.local-json-library{padding:20px;max-width:1400px;margin:0 auto;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.library-header{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:16px;padding:24px;margin-bottom:24px;text-align:center;box-shadow:0 4px 16px #667eea33;position:relative;overflow:hidden}.library-header:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(45deg,rgba(255,255,255,.1) 0%,transparent 100%);pointer-events:none}.library-header h2{margin:0;color:#fff;font-size:28px;font-weight:700;text-shadow:0 2px 4px rgba(0,0,0,.2);position:relative;z-index:1}.library-header p{margin:8px 0 0;color:#ffffffe6;font-size:16px;font-weight:400;position:relative;z-index:1}.dark-mode .library-header{background:linear-gradient(135deg,#2d2d2d,#1a1a1a);border:1px solid #444}.dark-mode .library-header h2{color:#e0e0e0}.dark-mode .library-header p{color:#e0e0e0cc}.controls-section{background:linear-gradient(135deg,#fff,#f8f9fa);border-radius:16px;padding:24px;margin-bottom:24px;border:1px solid #e3e6f0;box-shadow:0 4px 16px #0000000f;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.search-row{margin-bottom:20px}.search-input-container{position:relative;display:flex;align-items:center;width:100%;max-width:100%}.search-icon{position:absolute;left:16px;font-size:18px;color:#6c757d;z-index:2}.search-input{width:100%;padding:16px 50px;border:2px solid #e9ecef;border-radius:12px;font-size:16px;transition:all .3s ease;background:#fff;box-shadow:0 2px 8px #0000000a}.search-input:focus{outline:none;border-color:#4caf50;box-shadow:0 0 0 4px #4caf501a,0 4px 12px #0000001a;transform:translateY(-1px)}.search-input::placeholder{color:#adb5bd}.search-actions{position:absolute;right:12px;display:flex;align-items:center;gap:4px}.add-filter-btn{background:#4caf50;border:none;font-size:14px;color:#fff;cursor:pointer;padding:6px;border-radius:50%;transition:all .3s ease;width:28px;height:28px;display:flex;align-items:center;justify-content:center;font-weight:700}.add-filter-btn:hover{background:#45a049;transform:scale(1.1)}.clear-search{background:#f8f9fa;border:none;font-size:14px;color:#6c757d;cursor:pointer;padding:6px;border-radius:50%;transition:all .3s ease;width:28px;height:28px;display:flex;align-items:center;justify-content:center}.clear-search:hover{color:#495057;background:#e9ecef;transform:scale(1.1)}.active-filters{background:linear-gradient(135deg,#f8f9fa,#e9ecef);border-radius:12px;padding:20px;margin-bottom:20px;border:1px solid #dee2e6;box-shadow:0 2px 8px #0000000a}.filters-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.filters-label{font-weight:600;color:#495057;font-size:15px}.clear-all-filters{background:#dc3545;color:#fff;border:none;padding:8px 16px;border-radius:8px;font-size:13px;font-weight:500;cursor:pointer;transition:all .3s ease}.clear-all-filters:hover{background:#c82333;transform:translateY(-1px);box-shadow:0 4px 8px #dc35454d}.filter-tags{display:flex;flex-wrap:wrap;gap:12px}.filter-tag{background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;padding:8px 16px;border-radius:25px;font-size:13px;font-weight:500;display:flex;align-items:center;gap:8px;box-shadow:0 3px 6px #4caf504d;animation:filterTagSlide .3s ease;border:2px solid transparent}.filter-tag:hover{transform:translateY(-1px);box-shadow:0 4px 12px #4caf5066}.remove-filter{background:#ffffff40;border:none;color:#fff;border-radius:50%;width:20px;height:20px;font-size:11px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.remove-filter:hover{background:#fff6;transform:scale(1.15)}.dark-mode .active-filters{background:#2d2d2d;border-color:#444}.dark-mode .filters-label{color:#e0e0e0}.dark-mode .add-filter-btn{background:#4caf50}.dark-mode .clear-search{background:#444;color:#e0e0e0}.dark-mode .clear-search:hover{background:#555}.filters-row{display:flex;justify-content:flex-end;align-items:center;gap:20px;flex-wrap:wrap}.filter-group{display:flex;align-items:center;gap:12px}.filter-label{font-weight:600;color:#495057;font-size:14px;white-space:nowrap}.filter-select{padding:8px 12px;border:2px solid #dee2e6;border-radius:8px;background:#fff;font-size:14px;min-width:120px;transition:all .3s ease}.filter-select:focus{outline:none;border-color:#4caf50;box-shadow:0 0 0 3px #4caf501a;transform:translateY(-1px)}.view-toggle{display:flex;border:2px solid #dee2e6;border-radius:8px;overflow:hidden;background:#fff}.view-btn{padding:8px 12px;border:2px solid #e9ecef;background:#fff;border-radius:8px;cursor:pointer;transition:all .3s ease;font-size:16px}.view-btn:hover{border-color:#4caf50;background:#f8f9fa}.view-btn.active{background:#4caf50;color:#fff;border-color:#4caf50}.refresh-btn{padding:8px 16px;border:2px solid #007bff;background:#fff;color:#007bff;border-radius:8px;cursor:pointer;transition:all .3s ease;font-size:14px;font-weight:600;display:flex;align-items:center;gap:4px}.refresh-btn:hover:not(:disabled){background:#007bff;color:#fff}.refresh-btn:disabled{opacity:.6;cursor:not-allowed}.quiz-time-section{margin-bottom:20px;padding:16px;background:#f8f9fa;border-radius:8px;border:1px solid #e0e0e0}.time-setting{display:flex;align-items:center;justify-content:space-between;gap:15px}.time-icon{font-size:18px}.time-input{padding:8px 12px;border:2px solid #ddd;border-radius:6px;font-size:16px;width:80px;text-align:center;transition:border-color .3s}.time-input:focus{outline:none;border-color:#4caf50}.selected-files-section{background:linear-gradient(135deg,#e8f5e8,#f0f8f0);border:2px solid #4CAF50;border-radius:16px;padding:20px;margin-bottom:24px;box-shadow:0 4px 16px #4caf5026}.selected-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.selected-header h3{margin:0;color:#2e7d32;font-size:18px;font-weight:700}.selected-files-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}.selected-file-card .selected-indicator{background:#ff6b6b;color:#fff}.selected-file-card:hover .selected-indicator{background:#ff5252;transform:scale(1.1)}.dark-mode .selected-files-section{background:linear-gradient(135deg,#1a4a1a,#0d3d0d);border-color:#4caf50}.dark-mode .selected-header h3{color:#81c784}.selection-summary{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding:12px 16px;background:#f8f9fa;border-radius:8px;border:1px solid #e0e0e0}.selection-info{display:flex;align-items:center;gap:12px}.selection-count{font-weight:500;color:#333}.select-all-btn{background:#2196f3;color:#fff;border:none;padding:6px 12px;border-radius:4px;font-size:12px;cursor:pointer;transition:background .3s}.select-all-btn:hover{background:#1976d2}.clear-selection-btn{background:#ff6b6b;color:#fff;border:none;padding:6px 12px;border-radius:4px;font-size:12px;cursor:pointer;transition:background .3s}.clear-selection-btn:hover{background:#ff5252}.files-container{margin-bottom:30px}.files-container.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}.files-container.list{display:flex;flex-direction:column;gap:8px}.file-card{background:#fff;border:2px solid #e0e0e0;border-radius:12px;padding:16px;cursor:pointer;transition:all .3s;position:relative;display:flex;align-items:center;gap:12px}.file-card:hover{border-color:#4caf50;transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.file-card.selected{border-color:#4caf50;background:linear-gradient(135deg,#f0f8f0,#e8f5e8);box-shadow:0 2px 8px #4caf5033}.file-card.list{padding:12px 16px;border-radius:8px}.file-card.list:hover{transform:translateY(0);transform:translate(4px)}.file-content{display:flex;align-items:stretch;flex:1;width:100%}.file-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:8px;align-items:stretch}.file-row{display:flex;align-items:center;gap:8px;width:100%}.file-name-row{justify-content:flex-start;align-items:center}.file-meta-row{justify-content:space-between;align-items:center;width:100%;display:flex;flex-direction:row}.file-images-center{display:flex;justify-content:center;align-items:center;flex:1}.image-info{font-size:12px;color:#667eea;font-weight:600;background:#667eea1a;padding:4px 12px;border-radius:12px;display:flex;align-items:center;gap:4px}.dark-mode .image-info{color:#8892f0;background:#8892f026}.file-questions-left{display:flex;align-items:center;gap:8px;justify-content:flex-start;flex:0 0 auto}.file-size-right{display:flex;align-items:center;justify-content:flex-end;flex:0 0 auto}.file-icon{font-size:14px;flex-shrink:0}.question-prefix{font-size:12px;color:#666;font-weight:700;flex-shrink:0}.dark-mode .question-prefix{color:#bbb;font-weight:700}.file-name{margin:0;font-size:16px;font-weight:600;color:#333;line-height:1.3;word-break:break-word}.question-count,.file-size{font-size:12px;color:#666;font-weight:500}.selected-indicator{position:absolute;top:8px;right:8px;background:#4caf50;color:#fff;border-radius:50%;width:24px;height:24px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;box-shadow:0 2px 4px #0003}.no-results{text-align:center;padding:60px 20px;color:#666}.no-results-icon{font-size:48px;margin-bottom:16px}.no-results h3{margin:0 0 8px;color:#333}.no-results p{margin:0;color:#666}.action-section{text-align:center;padding-top:20px;border-top:2px solid #e0e0e0}.continue-btn{background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;border:none;padding:16px 32px;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:all .3s;box-shadow:0 4px 8px #4caf504d}.continue-btn:hover:not(.disabled){transform:translateY(-2px);box-shadow:0 6px 12px #4caf5066}.continue-btn.disabled{background:#ccc;cursor:not-allowed;opacity:.6;box-shadow:none}.btn-icon{font-size:14px}.loading-state{text-align:center;padding:60px 20px}.loading-spinner{width:40px;height:40px;border:4px solid #f3f3f3;border-top:4px solid #4CAF50;border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 20px}.empty-state{text-align:center;padding:60px 20px;color:#666}.empty-icon{font-size:48px;margin-bottom:20px}.empty-state h3{margin:0 0 10px;color:#333}.empty-state p{margin:0;color:#666}.dark-mode .local-json-library{color:#e0e0e0}.dark-mode .library-stats{background:linear-gradient(135deg,#3a3a3a,#2d2d2d)}.dark-mode .controls-section{background:#2d2d2d;border-color:#444}.dark-mode .search-input,.dark-mode .filter-select,.dark-mode .time-input{background:#2d2d2d;border-color:#444;color:#e0e0e0}.dark-mode .view-btn{background:#2d2d2d;color:#e0e0e0;border-color:#444}.dark-mode .view-btn.active{background:#4caf50;color:#fff}.dark-mode .quiz-time-section,.dark-mode .selection-summary{background:#2d2d2d;border-color:#444}.dark-mode .file-card{background:#2d2d2d;border-color:#444;color:#e0e0e0}.dark-mode .file-card.selected{background:linear-gradient(135deg,#1a4a1a,#0d3d0d);border-color:#4caf50}.dark-mode .file-name{color:#e0e0e0}.dark-mode .question-count,.dark-mode .file-size{color:#bbb}.dark-mode .selection-count,.dark-mode .filter-label{color:#e0e0e0}.dark-mode .action-section{border-top-color:#444}.dark-mode .empty-state h3,.dark-mode .no-results h3{color:#e0e0e0}@media (max-width: 1200px){.files-container.grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}}@media (max-width: 768px){.files-container.grid{grid-template-columns:1fr;gap:16px}.file-card{padding:16px}.library-header{flex-direction:column;gap:16px;align-items:stretch}.time-setting{justify-content:space-between}}@media (max-width: 480px){.local-json-library{padding:8px}.controls-section{padding:16px 12px;border-radius:10px;margin-bottom:16px}.search-row{margin-bottom:14px}.search-input{padding:12px 40px;font-size:16px;border-radius:8px}.search-icon{left:12px;font-size:15px}.clear-search{right:8px;width:26px;height:26px;font-size:12px}.filters-row{gap:12px}.filter-group{gap:4px}.filter-label{font-size:11px;font-weight:700}.filter-select{padding:10px 30px 10px 12px;font-size:15px;border-radius:6px;background-size:12px;background-position:right 8px center}.view-toggle{max-width:100px;border-radius:8px}.view-btn{padding:8px 12px;font-size:12px;min-width:40px}.file-card{padding:12px;border-radius:10px}.file-meta-row{flex-direction:row;justify-content:space-between;align-items:center;width:100%}.file-questions-left{justify-content:flex-start;flex:0 0 auto}.file-images-center{justify-content:center;flex:1}.file-size-right{justify-content:flex-end;flex:0 0 auto}.time-setting{gap:10px}.time-label{font-size:14px}.time-input{font-size:16px;padding:10px 12px}.selection-summary,.quiz-time-section{padding:12px;border-radius:8px}.continue-btn{padding:14px 24px;font-size:15px;border-radius:10px}}.dark-mode .filter-select{background:#2d2d2d;border-color:#444;color:#e0e0e0}@media (max-width: 768px){.filter-select option{background:#fff;color:#333;padding:12px 16px;font-size:16px;line-height:1.4}.dark-mode .filter-select option{background:#2d2d2d;color:#e0e0e0}.filter-select{-webkit-border-radius:8px;-webkit-box-shadow:0 2px 4px rgba(0,0,0,.04)}}@media (max-width: 480px){.filter-select option{padding:14px 12px;font-size:16px}.filter-select{min-height:44px;touch-action:manipulation}}.files-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:20px}.files-grid-2-col{grid-template-columns:repeat(2,1fr)}.library-stats{display:flex;align-items:center;justify-content:center;gap:16px;margin:16px 0 24px;padding:12px 20px;background:linear-gradient(135deg,#f8f9fa,#e9ecef);border-radius:10px;border:1px solid #dee2e6;box-shadow:0 2px 8px #0000000a}.total-files{font-size:14px;color:#495057;font-weight:600;text-align:center}.dark-mode .library-stats{background:linear-gradient(135deg,#2d2d2d,#1a1a1a);border-color:#444}.dark-mode .total-files{color:#e0e0e0}.upload-page.dark-mode .total-files{color:#a0a0a0}.pagination-controls{display:flex;justify-content:center;align-items:center;gap:20px;margin-top:32px;margin-bottom:40px;padding:24px 20px;background:#fffc;border-radius:16px;border:1px solid rgba(102,126,234,.1);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.upload-page.dark-mode .pagination-controls{background:#1a1a2ecc;border-color:#ffffff1a}.pagination-btn{display:flex;align-items:center;gap:8px;padding:10px 16px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:12px;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s ease;min-width:100px;justify-content:center}.pagination-btn:disabled{background:linear-gradient(135deg,#ccc,#bbb);cursor:not-allowed;transform:none;box-shadow:none;opacity:.6}.pagination-pages{display:flex;gap:12px;align-items:center;flex-wrap:nowrap;max-width:none}.pagination-page{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:2px solid rgba(102,126,234,.2);background:#fffc;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;transition:all .3s ease;color:#667eea;flex-shrink:0}.upload-page.dark-mode .pagination-page{background:#1a1a2ecc;border-color:#ffffff1a;color:#8892f0}.pagination-page:hover{border-color:#667eea;background:#667eea1a;transform:translateY(-1px)}.pagination-page.active{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-color:#667eea;transform:scale(1.05);box-shadow:0 4px 12px #667eea4d}@media (max-width: 768px){.files-grid,.files-grid-2-col{grid-template-columns:1fr;gap:16px}.file-card{padding:16px}.library-header{flex-direction:column;gap:16px;align-items:stretch}.time-setting{justify-content:space-between}.library-stats{justify-content:center;margin-top:12px}.total-files{font-size:13px;text-align:center}.selected-files-grid{grid-template-columns:1fr;gap:12px}.selected-header{flex-direction:column;gap:12px;align-items:stretch}.selected-header h3{text-align:center;font-size:16px}.pagination-controls{flex-direction:row;gap:12px;padding:16px 12px;margin-bottom:30px;overflow-x:auto;justify-content:flex-start;scroll-snap-type:x mandatory}.pagination-pages{flex-wrap:nowrap;justify-content:center;gap:8px;flex-shrink:0}.pagination-page{width:38px;height:38px;font-size:14px;flex-shrink:0;scroll-snap-align:center}.pagination-btn{min-width:80px;max-width:120px;font-size:13px;padding:10px 12px;flex-shrink:0;scroll-snap-align:center}}@media (max-width: 480px){.files-grid,.files-grid-2-col{grid-template-columns:1fr;gap:12px}.pagination-controls{padding:14px 10px;gap:10px;margin-bottom:25px;overflow-x:auto;-webkit-overflow-scrolling:touch}.pagination-pages{gap:6px;flex-shrink:0}.pagination-page{width:34px;height:34px;font-size:13px;flex-shrink:0}.pagination-btn{font-size:12px;padding:8px 12px;min-width:75px;max-width:100px;flex-shrink:0}.total-files{font-size:12px}}.upload-page{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);background-attachment:fixed;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;display:flex;flex-direction:column;transition:background-color .3s ease,color .3s ease;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.upload-page.dark-mode{background:#1a1a1a!important;color:#e0e0e0!important}.upload-page:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 80%,rgba(120,119,198,.3) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(255,255,255,.1) 0%,transparent 50%),radial-gradient(circle at 40% 40%,rgba(120,119,198,.2) 0%,transparent 50%);pointer-events:none;z-index:0}.upload-header{background:#4b3ee6;color:#fff;padding:12px 20px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 10px #0000001a;position:sticky;top:0;z-index:100;height:8vh;min-height:60px}.upload-page.dark-mode .upload-header{background:#2d2d30!important;border-bottom:1px solid #404040!important}.page-title{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:600}.title-icon{font-size:24px}.connection-indicator{display:flex;align-items:center;gap:6px;padding:6px 12px;border-radius:20px;background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.status-dot{width:8px;height:8px;border-radius:50%;animation:pulse 2s infinite}.status-dot.online{background:#4caf50}.status-dot.offline{background:#ff5722}@keyframes pulse{0%{opacity:1}50%{opacity:.5}to{opacity:1}}.status-text{font-size:12px;font-weight:500}.theme-toggle-btn,.library-toggle-btn,.refresh-btn{background:#ffffff1a;color:#fff;border:none;border-radius:8px;padding:8px 12px;cursor:pointer;font-size:16px;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.theme-toggle-btn:hover,.library-toggle-btn:hover,.refresh-btn:hover{background:#fff3;transform:translateY(-2px)}.library-toggle-btn.active{background:#fff3;box-shadow:0 0 10px #ffffff4d}.upload-page.dark-mode .theme-toggle-btn,.upload-page.dark-mode .library-toggle-btn{background:#404040!important;color:#e0e0e0!important;border:1px solid #555!important}.upload-content{flex:1;padding:20px;max-width:1200px;margin:0 auto;width:100%}.section-header{text-align:center;margin-bottom:30px}.section-header h2{color:#fff;font-size:28px;font-weight:700;margin-bottom:8px;text-shadow:0 2px 4px rgba(0,0,0,.3)}.upload-page.dark-mode .section-header h2{color:#e0e0e0!important}.section-header p{color:#ffffffe6;font-size:16px;margin:0}.upload-page.dark-mode .section-header p{color:#e0e0e0e6!important}.upload-section{background:#fffffff2;border-radius:20px;padding:30px;box-shadow:0 10px 30px #0000001a;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.2)}.upload-page.dark-mode .upload-section,.upload-page.dark-mode .library-section{background:#2d2d30f2!important;border:1px solid rgba(64,64,64,.3)!important;color:#e0e0e0!important}.upload-area{margin-bottom:30px}.file-input-container{margin-bottom:20px}.file-input-label{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;border:2px dashed #4b3ee6;border-radius:15px;cursor:pointer;transition:all .3s ease;background:linear-gradient(145deg,#f8f9ff,#e8ebff)}.upload-page.dark-mode .file-input-label{background:linear-gradient(145deg,#2a2a2d,#3a3a3d)!important;border-color:#5a4fcf!important}.file-input-label:hover{border-color:#5a4fcf;background:linear-gradient(145deg,#f0f2ff,#e0e4ff);transform:translateY(-2px);box-shadow:0 5px 15px #4b3ee633}.file-input-label.drag-over{border-color:#4caf50!important;background:linear-gradient(145deg,#e8f5e8,#d4f4d4)!important;transform:scale(1.02);box-shadow:0 8px 25px #4caf504d!important}.upload-page.dark-mode .file-input-label.drag-over{background:linear-gradient(145deg,#2d4a2d,#3d5a3d)!important;border-color:#4caf50!important}.file-input-icon{font-size:48px;margin-bottom:15px;opacity:.7}.file-input-text{text-align:center}.primary-text{display:block;font-size:18px;font-weight:600;color:#4b3ee6;margin-bottom:5px}.upload-page.dark-mode .primary-text{color:#7c71e6!important}.secondary-text{font-size:14px;color:#666}.upload-page.dark-mode .secondary-text{color:#999!important}.file-input-hidden{display:none}.file-list{background:#f8f9ff;border-radius:12px;padding:20px;border:1px solid #e0e4ff}.upload-page.dark-mode .file-list{background:#2a2a2d!important;border-color:#404040!important}.file-list h3{margin:0 0 15px;color:#4b3ee6;font-size:16px;font-weight:600}.upload-page.dark-mode .file-list h3{color:#7c71e6!important}.file-items{display:flex;flex-direction:column;gap:10px}.file-item{display:flex;justify-content:space-between;align-items:center;padding:15px;background:#fff;border-radius:10px;border:1px solid #e0e4ff;transition:all .3s ease;animation:slideInUp .4s ease-out}@keyframes slideInUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.upload-page.dark-mode .file-item{background:#3a3a3d!important;border-color:#555!important}.file-item:hover{transform:translateY(-1px);box-shadow:0 4px 12px #0000001a}.file-info{display:flex;align-items:center;gap:12px;flex:1}.file-icon{font-size:24px;opacity:.7}.file-details{display:flex;flex-direction:column}.file-name{font-weight:600;color:#333;font-size:14px}.upload-page.dark-mode .file-name{color:#e0e0e0!important}.file-size{font-size:12px;color:#666}.upload-page.dark-mode .file-size{color:#999!important}.file-actions{display:flex;align-items:center;gap:8px}.image-upload-btn,.remove-file-btn{background:none;border:none;font-size:18px;cursor:pointer;padding:6px;border-radius:6px;transition:all .3s ease}.image-upload-btn:hover{background:#e8ebff;transform:scale(1.1)}.upload-page.dark-mode .image-upload-btn:hover{background:#404040!important}.remove-file-btn:hover{background:#ffebee;transform:scale(1.1)}.upload-page.dark-mode .remove-file-btn:hover{background:#4a2a2a!important}.image-count{background:#4b3ee6;color:#fff;font-size:10px;padding:2px 6px;border-radius:10px;font-weight:700;min-width:16px;text-align:center}.settings-section{margin-bottom:30px;padding:20px;background:#f8f9ff;border-radius:12px;border:1px solid #e0e4ff}.upload-page.dark-mode .settings-section{background:#2a2a2d!important;border-color:#404040!important}.settings-section h3{margin:0 0 20px;color:#4b3ee6;font-size:18px;font-weight:600}.upload-page.dark-mode .settings-section h3{color:#7c71e6!important}.time-setting{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px}.time-label{display:flex;align-items:center;gap:8px;font-weight:500;color:#333}.upload-page.dark-mode .time-label{color:#e0e0e0!important}.label-icon{font-size:20px}.time-input-container{display:flex;align-items:center;gap:10px}.time-input{padding:10px 15px;border:2px solid #e0e4ff;border-radius:8px;font-size:16px;width:80px;text-align:center;font-weight:600;transition:all .3s ease}.upload-page.dark-mode .time-input{background:#3a3a3d!important;border-color:#555!important;color:#e0e0e0!important}.time-input:focus{outline:none;border-color:#4b3ee6;box-shadow:0 0 0 3px #4b3ee61a}.time-display{padding:10px 15px;background:#4b3ee6;color:#fff;border-radius:8px;font-weight:600;min-width:60px;text-align:center}.success-section{margin-bottom:20px}.success-message{display:flex;align-items:center;gap:10px;padding:12px 16px;background:#e8f5e8;border:1px solid #4CAF50;border-radius:8px;margin-bottom:8px;animation:successSlideIn .5s ease-out}@keyframes successSlideIn{0%{transform:translateY(-10px);opacity:0}to{transform:translateY(0);opacity:1}}.upload-page.dark-mode .success-message{background:#2a4a2a!important;border-color:#4caf50!important}.success-icon{font-size:18px}.success-text{color:#2e7d32;font-weight:500}.upload-page.dark-mode .success-text{color:#81c784!important}.error-section{margin-bottom:20px}.error-message{display:flex;align-items:center;gap:10px;padding:12px 16px;background:#ffebee;border:1px solid #ffcdd2;border-radius:8px;margin-bottom:8px}.upload-page.dark-mode .error-message{background:#4a2a2a!important;border-color:#6a3a3a!important}.error-icon{font-size:18px}.error-text{color:#d32f2f;font-weight:500}.upload-page.dark-mode .error-text{color:#ff6b6b!important}.action-section{display:flex;justify-content:center}.next-btn{display:flex;align-items:center;gap:10px;padding:15px 30px;background:linear-gradient(135deg,#4b3ee6,#5a4fcf);color:#fff;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease;min-width:150px;justify-content:center}.next-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 25px #4b3ee64d}.next-btn:disabled{opacity:.6;cursor:not-allowed}.next-btn.loading{cursor:not-allowed}.upload-page{min-height:100vh;background:linear-gradient(135deg,#f8faff,#e8f2ff,#f0f7ff);background-attachment:fixed;font-family:Inter,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;display:flex;flex-direction:column;transition:all .3s ease;position:relative;overflow-x:hidden;color:#1a1a1a}.upload-page:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 80%,rgba(102,126,234,.08) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(240,147,251,.06) 0%,transparent 50%),radial-gradient(circle at 40% 40%,rgba(118,75,162,.05) 0%,transparent 50%);pointer-events:none;z-index:0}.upload-page.dark-mode{background:linear-gradient(135deg,#1a1a2e,#16213e,#0f3460);color:#e0e0e0}.upload-page.dark-mode:before{background:radial-gradient(circle at 20% 80%,rgba(26,26,46,.6) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(15,52,96,.4) 0%,transparent 50%),radial-gradient(circle at 40% 40%,rgba(22,33,62,.3) 0%,transparent 50%)}.upload-page>*{position:relative;z-index:1}.upload-header{background:linear-gradient(135deg,#667eea,#764ba2);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);color:#fff;padding:16px 24px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 8px 32px #00000014;border-bottom:1px solid rgba(102,126,234,.1);position:fixed;top:0;left:0;right:0;z-index:1000;overflow-x:auto;overflow-y:hidden;white-space:nowrap;width:100%;height:8vh;max-height:80px;min-height:60px}.upload-page.dark-mode .upload-header{background:#1a1a2ecc;border-bottom:1px solid rgba(255,255,255,.05);color:#fff}.page-title{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:700;letter-spacing:-.5px;color:#fff;flex:1}.header-controls{display:flex;align-items:center;gap:16px;flex-shrink:0;min-width:max-content}.connection-indicator{display:flex;align-items:center;gap:8px;padding:8px 16px;background:#4caf5033;border:1px solid rgba(76,175,80,.3);border-radius:20px;font-size:14px;font-weight:500}.status-dot{width:8px;height:8px;background:#4caf50;border-radius:50%;animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.refresh-data-btn{background:none;border:none;font-size:20px;cursor:pointer;padding:8px;border-radius:8px;transition:all .3s ease;display:flex;align-items:center;justify-content:center;color:#ff6b6b}.refresh-data-btn:hover{background-color:#ff6b6b1a;transform:rotate(180deg)}.theme-toggle-btn{background:none;border:none;font-size:20px;cursor:pointer;padding:8px;border-radius:8px;transition:all .3s ease;display:flex;align-items:center;justify-content:center}.theme-toggle-btn:hover{background-color:#ffffff1a;transform:scale(1.1)}.theme-toggle-btn,.library-toggle-btn{background:#667eea1a;color:#667eea;border:none;border-radius:12px;padding:10px 16px;cursor:pointer;font-size:16px;font-weight:500;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(102,126,234,.2)}.theme-toggle-btn:hover,.library-toggle-btn:hover{background:#667eea33;transform:translateY(-2px);box-shadow:0 4px 12px #667eea33}.library-toggle-btn.active{background:#667eea;color:#fff}.library-toggle-btn:hover{background:#fff3;transform:scale(1.05)}.clear-database-btn{background:#ff4757;color:#fff;border:none;padding:8px 12px;border-radius:8px;font-size:16px;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center}.clear-database-btn:hover{background:#ff3838;transform:scale(1.05)}.clear-database-btn.loading{background:#ff8a80;cursor:not-allowed;animation:pulse 1.5s ease-in-out infinite}.clear-database-btn:disabled{background:#ff8a80;cursor:not-allowed;opacity:.7}@keyframes pulse{0%{opacity:1}50%{opacity:.7}to{opacity:1}}.upload-page.dark-mode .clear-database-btn{background:#ff6b6b}.upload-page.dark-mode .clear-database-btn:hover{background:#ff5252}.upload-page.dark-mode .clear-database-btn.loading,.upload-page.dark-mode .clear-database-btn:disabled{background:#ff8a80}.upload-content{flex:1;padding:32px 24px;padding-top:calc(8vh + 32px);max-width:1200px;margin:0 auto;width:100%}.section-header{text-align:center;margin-bottom:40px}.section-header h2{color:#1a1a1a;font-size:32px;font-weight:800;margin-bottom:12px;text-shadow:0 2px 4px rgba(0,0,0,.1);letter-spacing:-1px}.upload-page.dark-mode .section-header h2{color:#f0f0f0;text-shadow:0 4px 8px rgba(0,0,0,.3)}.section-header p{color:#4a5568;font-size:18px;margin:0;font-weight:400}.upload-page.dark-mode .section-header p{color:#f0f0f0cc}.upload-section{background:#fffffffa;border-radius:24px;padding:40px;box-shadow:0 20px 60px #0000000f;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid rgba(102,126,234,.1);margin-bottom:32px;transition:all .3s ease}.upload-instructions{text-align:center;margin-bottom:24px;padding:16px}.upload-instructions h3{color:#667eea;font-size:20px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;justify-content:center;gap:8px}.upload-page.dark-mode .upload-instructions h3{color:#8892f0}.upload-instructions p{color:#666;font-size:14px;margin:0;font-weight:500}.upload-page.dark-mode .upload-instructions p{color:#a0a0a0}.upload-page.dark-mode .upload-section{background:#1a1a2ee6;border:1px solid rgba(255,255,255,.1);color:#e0e0e0}.upload-section:hover{transform:translateY(-4px);box-shadow:0 25px 70px #00000026}.upload-area{margin-bottom:32px}.file-input-container{margin-bottom:24px}.file-input-label{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 32px;border:3px dashed #667eea;border-radius:20px;cursor:pointer;transition:all .3s ease;background:linear-gradient(145deg,#fafbff,#f0f4ff);position:relative;overflow:hidden;box-shadow:0 8px 24px #667eea14}.upload-page.dark-mode .file-input-label{background:linear-gradient(145deg,#2a2a46,#1a1a2e);border-color:#4a5568;box-shadow:0 8px 24px #0003}.file-input-label:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:conic-gradient(from 0deg,transparent,rgba(102,126,234,.1),transparent);animation:rotate 6s linear infinite;opacity:0;transition:opacity .3s ease}.file-input-label:hover:before{opacity:1}@keyframes rotate{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.file-input-label:hover{border-color:#5a4fcf;background:linear-gradient(145deg,#e8ebff,#d8dbff);transform:translateY(-2px);box-shadow:0 8px 24px #667eea33}.upload-page.dark-mode .file-input-label:hover{background:linear-gradient(145deg,#3a3a56,#2a2a3e);border-color:#667eea}.file-input-label.drag-over{border-color:#4caf50!important;background:linear-gradient(145deg,#e8f5e8,#d4f4d4)!important;transform:scale(1.02);box-shadow:0 12px 32px #4caf504d!important}.upload-page.dark-mode .file-input-label.drag-over{background:linear-gradient(145deg,#2a4a2a,#1a3a1a)!important}.file-count-badge{position:absolute;top:16px;right:16px;background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;padding:8px 12px;border-radius:20px;font-size:12px;font-weight:600;display:flex;align-items:center;gap:4px;animation:slideInBounce .5s ease-out;box-shadow:0 4px 12px #4caf504d}@keyframes slideInBounce{0%{transform:translate(100%) scale(.8);opacity:0}60%{transform:translate(-10%) scale(1.1);opacity:1}to{transform:translate(0) scale(1);opacity:1}}.count-number{font-size:14px;font-weight:700}.count-text{font-size:10px;opacity:.9}.file-input-icon{font-size:48px;margin-bottom:16px;color:#667eea;filter:drop-shadow(0 4px 8px rgba(0,0,0,.1))}.primary-text{font-size:20px;font-weight:600;color:#1a1a1a;margin-bottom:8px;letter-spacing:-.3px}.upload-page.dark-mode .primary-text{color:#f0f0f0}.secondary-text{font-size:16px;color:#4a5568;text-align:center;line-height:1.5;margin-bottom:8px}.upload-page.dark-mode .secondary-text{color:#a0a0a0}.helper-text{font-size:12px;color:#999;text-align:center;font-style:italic;margin-top:4px}.upload-page.dark-mode .helper-text{color:#777}.file-input{display:none}.settings-section{margin-bottom:32px;padding:28px;background:linear-gradient(145deg,#fafbff,#f0f4ff);border-radius:20px;border:1px solid rgba(102,126,234,.15);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 8px 24px #667eea0f}.upload-page.dark-mode .settings-section{background:linear-gradient(145deg,#2a2a46,#1a1a2e);border:1px solid rgba(255,255,255,.1);box-shadow:0 8px 24px #0003}.settings-header{text-align:center;margin-bottom:28px}.settings-header h3{color:#667eea;font-size:22px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;justify-content:center;gap:12px}.upload-page.dark-mode .settings-header h3{color:#8892f0}.settings-header p{color:#666;font-size:14px;margin:0;font-weight:500}.upload-page.dark-mode .settings-header p{color:#a0a0a0}.settings-grid{display:flex;flex-direction:column;gap:24px}.setting-item{display:flex;justify-content:space-between;align-items:center;padding:20px;background:#fffc;border-radius:16px;border:1px solid rgba(102,126,234,.1);transition:all .3s ease}.upload-page.dark-mode .setting-item{background:#1a1a2ecc;border-color:#ffffff1a}.setting-item:hover{transform:translateY(-1px);box-shadow:0 4px 16px #667eea26}.setting-label{display:flex;align-items:center;gap:16px;flex:1;cursor:pointer}.label-icon{font-size:28px;filter:drop-shadow(0 2px 4px rgba(0,0,0,.1));flex-shrink:0}.label-content{display:flex;flex-direction:column;gap:2px}.label-title{font-weight:700;color:#333;font-size:16px}.upload-page.dark-mode .label-title{color:#f0f0f0}.label-subtitle{font-size:13px;color:#666;font-weight:400}.upload-page.dark-mode .label-subtitle{color:#a0a0a0}.time-input-container{display:flex;align-items:center;gap:12px;flex-shrink:0}.time-input{padding:14px 18px;border:2px solid rgba(102,126,234,.2);border-radius:12px;font-size:18px;width:80px;text-align:center;font-weight:600;transition:all .3s ease;background:#fff;box-shadow:0 2px 8px #0000000d}.upload-page.dark-mode .time-input{background:#3a3a56;border-color:#ffffff1a;color:#e0e0e0}.time-input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 4px #667eea1a;transform:scale(1.05)}.time-unit{font-size:14px;color:#667eea;font-weight:600;padding:8px 12px;background:#667eea1a;border-radius:8px}.upload-page.dark-mode .time-unit{color:#8892f0;background:#8892f033}.setting-info{margin-top:16px}.info-card{display:flex;align-items:center;gap:12px;padding:16px 20px;background:linear-gradient(135deg,#4caf501a,#43a0470d);border:1px solid rgba(76,175,80,.2);border-radius:12px;font-size:14px}.upload-page.dark-mode .info-card{background:linear-gradient(135deg,#4caf5026,#43a0471a);border-color:#4caf504d}.info-icon{font-size:20px;flex-shrink:0}.info-content{color:#2e7d32;line-height:1.4}.upload-page.dark-mode .info-content{color:#81c784}.file-list{display:flex;flex-direction:column;gap:16px;margin-bottom:32px}.file-item{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;background:linear-gradient(145deg,#fff,#f8f9ff);border-radius:16px;border:1px solid rgba(102,126,234,.1);transition:all .3s ease;box-shadow:0 4px 12px #0000000d}.upload-page.dark-mode .file-item{background:linear-gradient(145deg,#2a2a46,#1a1a2e);border:1px solid rgba(255,255,255,.1)}.file-item:hover{transform:translateY(-2px);box-shadow:0 8px 20px #0000001a;border-color:#667eea4d}.file-info{display:flex;align-items:center;gap:16px;flex:1}.file-icon{font-size:24px;color:#667eea}.file-details{flex:1}.file-name{font-weight:600;color:#333;margin-bottom:4px;font-size:16px}.upload-page.dark-mode .file-name{color:#f0f0f0}.file-meta{display:flex;gap:16px;font-size:14px;color:#666}.upload-page.dark-mode .file-meta{color:#a0a0a0}.file-actions{display:flex;gap:12px;align-items:center}.preview-btn,.remove-file-btn{padding:8px 16px;border:none;border-radius:8px;cursor:pointer;font-size:14px;font-weight:500;transition:all .3s ease;display:flex;align-items:center;gap:6px}.preview-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.preview-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #667eea4d}.remove-file-btn{background:linear-gradient(135deg,#ff6b6b,#ee5a52);color:#fff}.remove-file-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #ff6b6b4d}.image-count{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:12px;padding:4px 8px;border-radius:12px;font-weight:600;min-width:20px;text-align:center;box-shadow:0 2px 4px #0000001a}.next-btn{display:flex;align-items:center;justify-content:center;gap:12px;padding:16px 32px;background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;border:none;border-radius:16px;font-size:18px;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 8px 24px #4caf504d;margin:0 auto;min-width:200px}.next-btn:hover:not(:disabled){transform:translateY(-3px);box-shadow:0 12px 32px #4caf5066}.next-btn:disabled{background:linear-gradient(135deg,#ccc,#bbb);cursor:not-allowed;transform:none;box-shadow:none}.btn-text{font-size:18px;font-weight:600}.loading-spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top:2px solid white;border-radius:50%;animation:spin 1s linear infinite}.library-section{background:#fffffff2;border-radius:24px;padding:40px;box-shadow:0 20px 60px #0000001a;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.2);margin-top:32px}.upload-page.dark-mode .library-section{background:#1a1a2ee6;border:1px solid rgba(255,255,255,.1);color:#e0e0e0}@media (max-width: 768px){.upload-header{padding:12px 16px;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;-ms-overflow-style:none;height:8vh;max-height:70px;min-height:50px;min-width:100%}.upload-header::-webkit-scrollbar{display:none}.upload-content{padding:20px 16px;padding-top:calc(8vh + 40px)}.upload-section,.library-section{padding:24px 20px;border-radius:20px}.page-title{font-size:18px;white-space:nowrap;flex-shrink:0;min-width:max-content}.title-icon{font-size:22px}.title-text{font-size:18px;font-weight:700}.section-header h2{font-size:28px}.section-header p{font-size:15px}.upload-instructions{padding:12px;margin-bottom:20px}.upload-instructions h3{font-size:18px}.upload-instructions p{font-size:13px}.settings-section{padding:20px;margin-bottom:24px}.settings-header h3{font-size:20px}.settings-header p{font-size:13px}.setting-item{flex-direction:column;align-items:flex-start;gap:16px;padding:20px 16px}.setting-label{width:100%;justify-content:flex-start}.label-icon{font-size:24px}.label-title{font-size:15px}.label-subtitle{font-size:12px}.time-input-container{width:100%;justify-content:center;gap:16px}.time-input{width:100px;font-size:16px;padding:12px 16px}.time-unit{font-size:13px;padding:8px 16px}.info-card{padding:14px 16px;font-size:13px}.info-icon{font-size:18px}.file-item{flex-direction:column;gap:16px;align-items:stretch;text-align:center;padding:16px}.file-actions{justify-content:center}.file-input-label{padding:32px 20px}.file-input-icon{font-size:40px}.primary-text{font-size:18px}.secondary-text{font-size:14px}.helper-text{font-size:11px}.next-btn{width:100%;padding:16px 24px;font-size:16px}}@media (max-width: 480px){.upload-header{padding:12px 16px}.header-controls{gap:8px}.theme-toggle-btn,.library-toggle-btn{padding:8px 12px;font-size:14px}.connection-indicator{padding:6px 12px;font-size:12px}.status-text{display:none}.file-input-label{padding:32px 20px}.file-input-icon{font-size:40px}.primary-text{font-size:18px}.secondary-text{font-size:14px}.next-btn{padding:14px 24px;font-size:16px}.upload-section,.library-section{padding:20px;border-radius:16px}}@media (max-width: 480px){.upload-header{padding:10px 12px;gap:8px}.page-title{font-size:16px;gap:8px;flex-shrink:0;min-width:max-content}.title-icon{font-size:20px}.title-text{font-size:16px;font-weight:700;white-space:nowrap}.header-controls{gap:6px;flex-shrink:1;min-width:0}.theme-toggle-btn,.library-toggle-btn{padding:6px 8px;font-size:14px;min-width:32px;min-height:32px}.connection-indicator{padding:4px 8px;font-size:11px}.status-text{display:none}.clear-database-btn,.refresh-btn{padding:6px 8px;font-size:14px;min-width:32px;min-height:32px}.upload-content{padding:16px 12px;padding-top:calc(8vh + 35px)}.upload-section,.library-section{padding:20px 16px;border-radius:16px}.section-header h2{font-size:24px}.section-header p{font-size:14px}.upload-instructions h3{font-size:16px;flex-direction:column;gap:4px}.upload-instructions p{font-size:12px}.file-input-label{padding:28px 16px}.file-input-icon{font-size:32px;margin-bottom:12px}.primary-text{font-size:16px}.secondary-text{font-size:13px}.helper-text{font-size:10px}.settings-section{padding:16px;margin-bottom:20px}.settings-header h3{font-size:18px;flex-direction:column;gap:4px}.settings-header p{font-size:12px}.setting-item{padding:16px 12px;gap:12px}.label-icon{font-size:20px}.label-title{font-size:14px}.label-subtitle{font-size:11px}.time-input{width:80px;font-size:14px;padding:10px 12px}.time-unit{font-size:12px;padding:6px 12px}.info-card{padding:12px 14px;font-size:12px;gap:8px}.info-icon{font-size:16px}.next-btn{padding:14px 20px;font-size:15px;border-radius:12px}.file-item{padding:14px 12px;border-radius:12px}.file-name{font-size:14px}.file-size{font-size:11px}}.upload-container{background:var(--card-bg);border:2px dashed var(--border-color);border-radius:12px;padding:40px 20px;text-align:center;transition:all .3s ease;cursor:pointer;margin-bottom:30px}.data-management{margin-top:20px;padding-top:20px;border-top:1px solid var(--border-color)}.clear-data-btn{background:#ff4757;color:#fff;border:none;padding:10px 20px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s ease;display:inline-flex;align-items:center;gap:8px}.clear-data-btn:hover{background:#ff3838;transform:translateY(-2px);box-shadow:0 4px 12px #ff47574d}.developer-tools-compact{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:20px}.developer-tools-title{display:flex;align-items:center;gap:12px;font-weight:600;color:#333;font-size:16px}.upload-page.dark-mode .developer-tools-title{color:#e0e0e0}.tools-icon{font-size:20px}.tools-text{font-weight:700;letter-spacing:-.3px}.developer-tools-row,.cache-cleaner-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.compact-dev-btn{background:#fff;color:#333;border:2px solid #e0e4ff;padding:8px 16px;border-radius:10px;font-weight:600;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;gap:6px;font-size:14px;box-shadow:0 2px 8px #0000000d;min-width:70px;justify-content:center}.upload-page.dark-mode .compact-dev-btn{background:#3a3a56;color:#e0e0e0;border-color:#ffffff1a}.compact-dev-btn:disabled{opacity:.5;cursor:not-allowed}.compact-dev-btn:not(:disabled):hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.compact-dev-btn.fetch-btn{border-color:#10b981;color:#10b981}.compact-dev-btn.fetch-btn:not(:disabled):hover{background:#10b981;color:#fff}.compact-dev-btn.clear-btn{border-color:#ffc107;color:#f59e0b}.compact-dev-btn.clear-btn:not(:disabled):hover{background:#ffc107;color:#fff}.compact-dev-btn.storage-btn{border-color:#6f42c1;color:#6f42c1}.compact-dev-btn.storage-btn:not(:disabled):hover{background:#6f42c1;color:#fff}.compact-dev-btn.delete-btn{border-color:#ef4444;color:#ef4444}.compact-dev-btn.delete-btn:not(:disabled):hover{background:#ef4444;color:#fff}.compact-icon{font-size:16px}.compact-text{font-size:12px;font-weight:700}@media (max-width: 768px){.fixed-developer-footer{padding:10px 16px}.developer-tools-compact{flex-direction:column;gap:12px;align-items:center}.developer-tools-title{font-size:14px;gap:8px}.tools-icon{font-size:18px}.developer-tools-row{justify-content:center;gap:8px}}@media (max-width: 480px){.fixed-developer-footer{padding:8px 12px}.developer-tools-title{font-size:13px;gap:6px}.tools-icon{font-size:16px}.developer-tools-row{gap:6px;flex-wrap:nowrap;overflow-x:auto;padding:4px 0}}.custom-dialog-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:10000;animation:dialogFadeIn .3s ease-out}@keyframes dialogFadeIn{0%{opacity:0}to{opacity:1}}.custom-dialog-box{background:#fff;border-radius:16px;box-shadow:0 20px 60px #0000004d;max-width:500px;width:90%;max-height:80vh;overflow:hidden;animation:dialogSlideIn .3s ease-out}@keyframes dialogSlideIn{0%{transform:scale(.9) translateY(-20px);opacity:0}to{transform:scale(1) translateY(0);opacity:1}}.upload-page.dark-mode .custom-dialog-box{background:#2d2d30;color:#e0e0e0}.dialog-header{display:flex;justify-content:space-between;align-items:center;padding:20px 24px 16px;border-bottom:1px solid #e0e0e0}.upload-page.dark-mode .dialog-header{border-bottom-color:#404040}.dialog-title{display:flex;align-items:center;gap:12px;margin:0;font-size:18px;font-weight:600;color:#333}.upload-page.dark-mode .dialog-title{color:#f0f0f0}.dialog-icon{font-size:20px}.dialog-close-btn{background:none;border:none;font-size:20px;cursor:pointer;padding:4px;border-radius:4px;color:#666;transition:all .2s ease}.dialog-close-btn:hover{background:#f0f0f0;color:#333}.upload-page.dark-mode .dialog-close-btn{color:#a0a0a0}.upload-page.dark-mode .dialog-close-btn:hover{background:#404040;color:#f0f0f0}.dialog-content{padding:20px 24px;max-height:50vh;overflow-y:auto}.dialog-message{margin:0;line-height:1.6;color:#555;white-space:pre-line}.upload-page.dark-mode .dialog-message{color:#d0d0d0}.dialog-actions{padding:16px 24px 20px;display:flex;justify-content:flex-end;border-top:1px solid #e0e0e0}.upload-page.dark-mode .dialog-actions{border-top-color:#404040}.dialog-ok-btn{background:linear-gradient(135deg,#4b3ee6,#5a4fcf);color:#fff;border:none;border-radius:8px;padding:10px 24px;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s ease}.dialog-ok-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #4b3ee64d}.fixed-developer-footer{background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-top:1px solid rgba(102,126,234,.1);padding:12px 20px;box-shadow:0 -4px 20px #00000014;margin-top:32px}.upload-page.dark-mode .fixed-developer-footer{background:#1a1a2ef2;border-top:1px solid rgba(255,255,255,.1)}.section-page{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2,#f093fb 80%,#f5576c);background-attachment:fixed;font-family:Inter,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;display:flex;flex-direction:column;transition:all .3s ease;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;position:relative;overflow-x:hidden}.section-page.dark-mode{background:linear-gradient(135deg,#0f0f23,#1a1a2e,#16213e 80%,#0f3460);color:#e0e0e0}.section-page:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 80%,rgba(102,126,234,.4) 0%,transparent 60%),radial-gradient(circle at 80% 20%,rgba(240,147,251,.3) 0%,transparent 60%),radial-gradient(circle at 40% 40%,rgba(245,87,108,.2) 0%,transparent 60%),radial-gradient(circle at 60% 70%,rgba(118,75,162,.3) 0%,transparent 50%);pointer-events:none;z-index:0;animation:gradientFloat 20s ease-in-out infinite}.section-page.dark-mode:before{background:radial-gradient(circle at 20% 80%,rgba(15,15,35,.6) 0%,transparent 60%),radial-gradient(circle at 80% 20%,rgba(15,52,96,.4) 0%,transparent 60%),radial-gradient(circle at 40% 40%,rgba(26,26,46,.5) 0%,transparent 60%),radial-gradient(circle at 60% 70%,rgba(22,33,62,.4) 0%,transparent 50%)}@keyframes gradientFloat{0%,to{opacity:1;transform:scale(1) rotate(0)}33%{opacity:.8;transform:scale(1.1) rotate(1deg)}66%{opacity:.9;transform:scale(.95) rotate(-1deg)}}.section-page>*{position:relative;z-index:1}.section-header{background:linear-gradient(135deg,#667eea,#764ba2);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);color:#fff;padding:16px 24px;display:flex;justify-content:space-between;align-items:center;font-size:18px;font-weight:600;box-shadow:0 8px 32px #00000014;border-bottom:1px solid rgba(102,126,234,.1);position:fixed;top:0;left:0;right:0;z-index:1000;height:8vh;max-height:80px;min-height:60px;flex-shrink:0;margin:0;width:100%;overflow-x:auto;overflow-y:hidden;white-space:nowrap}.section-page.dark-mode .section-header{background:#1a1a2ecc!important;border-bottom:1px solid rgba(255,255,255,.05)!important;color:#fff!important}.section-page.dark-mode .page-title{color:#fff!important}.header-controls{display:flex;align-items:center;justify-content:center;gap:16px;height:100%}.selection-summary{display:flex;flex-direction:row;align-items:center;justify-content:center;gap:6px;padding:8px 16px;border-radius:16px;background:#ffffff26;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);min-width:70px;border:1px solid rgba(255,255,255,.1);transition:all .3s ease;height:fit-content;align-self:center}.selection-summary:hover{background:#fff3;transform:translateY(-1px)}.summary-text{font-size:18px;font-weight:800;line-height:1;background:linear-gradient(45deg,#fff,#f0f8ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.summary-label{font-size:11px;opacity:.9;text-transform:uppercase;letter-spacing:.8px;font-weight:500}.theme-toggle-btn{background:#667eea1a;color:#fff;border:none;border-radius:12px;padding:10px 16px;cursor:pointer;font-size:16px;font-weight:500;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);margin-left:10px}.theme-toggle-btn:hover{background:#667eea33;transform:translateY(-2px);box-shadow:0 4px 12px #667eea33}.section-page.dark-mode .theme-toggle-btn{background:#667eea1a!important;color:#fff!important;border:1px solid rgba(255,255,255,.1)!important}.section-content{flex:1;padding:20px;padding-top:calc(8vh + 20px);max-width:1200px;margin:0 auto;width:100%}.quiz-config-bar{background:#fffffff2;border-radius:16px;padding:20px 24px;margin-bottom:30px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 4px 20px #00000014;border:1px solid rgba(102,126,234,.15);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.section-page.dark-mode .quiz-config-bar{background:#28282cf2;border-color:#ffffff1a;color:#e0e0e0}.config-title{display:flex;align-items:center;gap:8px;font-size:18px;font-weight:600;color:#2d3748}.section-page.dark-mode .config-title{color:#e2e8f0}.config-controls{display:flex;align-items:center;gap:32px}.config-item{display:flex;align-items:center;gap:8px}.config-icon{font-size:18px;min-width:20px}.time-input-mini{width:60px;padding:6px 8px;border:2px solid #e2e8f0;border-radius:8px;font-size:14px;font-weight:600;text-align:center;background:#fff;color:#2d3748;transition:all .2s ease}.time-input-mini:focus{outline:none;border-color:#4caf50;box-shadow:0 0 0 3px #4caf501a}.section-page.dark-mode .time-input-mini{background:#2d3748;border-color:#4a5568;color:#e2e8f0}.config-unit{font-size:12px;color:#718096;font-weight:500;text-transform:uppercase;letter-spacing:.5px}.section-page.dark-mode .config-unit{color:#a0aec0}.config-checkbox{display:flex;align-items:center;gap:6px;cursor:pointer;-webkit-user-select:none;user-select:none}.config-checkbox input[type=checkbox]{position:absolute;opacity:0;width:0;height:0}.checkbox-custom{width:18px;height:18px;border:2px solid #cbd5e0;border-radius:4px;background:#fff;transition:all .2s ease;position:relative}.section-page.dark-mode .checkbox-custom{background:#2d3748;border-color:#4a5568}.config-checkbox input:checked+.checkbox-custom{background:#4caf50;border-color:#4caf50}.config-checkbox input:checked+.checkbox-custom:after{content:"✓";position:absolute;top:-2px;left:2px;color:#fff;font-size:12px;font-weight:700}.config-label{font-size:14px;font-weight:500;color:#4a5568}.section-page.dark-mode .config-label{color:#e2e8f0}.sections-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;margin-bottom:40px}.section-card{background:#fffffffa;border-radius:16px;padding:24px;box-shadow:0 4px 20px #00000014,0 1px 3px #0000000a;border:1px solid rgba(0,0,0,.05);transition:all .3s ease;position:relative;overflow:hidden}.section-page.dark-mode .section-card{background:#28282cf2;border:1px solid rgba(255,255,255,.08);color:#e0e0e0;box-shadow:0 4px 20px #0003,0 1px 3px #0000001a}.section-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px #0000001f,0 3px 8px #0000000f;border-color:#667eea33}.section-page.dark-mode .section-card:hover{box-shadow:0 8px 30px #0000004d,0 3px 8px #00000026;border-color:#8892f04d}.section-card-header{display:flex;flex-direction:column;gap:12px;margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid rgba(0,0,0,.08)}.section-page.dark-mode .section-card-header{border-bottom-color:#ffffff1f}.section-name-row,.section-controls-row{display:flex;justify-content:space-between;align-items:center;width:100%}.section-name{font-size:18px;font-weight:600;color:#2d3748;margin:0;display:flex;align-items:center;gap:10px;line-height:1.2}.section-page.dark-mode .section-name{color:#fff}.section-name:before{content:"📚";font-size:16px;opacity:.8}.section-stats{display:flex;gap:12px;align-items:center;font-size:13px}.total-questions{color:#718096;font-weight:500}.section-page.dark-mode .total-questions{color:#a0aec0}.selected-count{color:#4c51bf;font-weight:600;padding:4px 10px;background:#4c51bf1a;border-radius:16px;border:1px solid rgba(76,81,191,.15);font-size:12px}.section-page.dark-mode .selected-count{color:#a78bfa;background:#a78bfa26;border-color:#a78bfa33}.preview-images-btn{background:#4c51bf;color:#fff;border:none;border-radius:8px;padding:6px 12px;font-size:11px;font-weight:500;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:4px;box-shadow:0 2px 4px #00000014}.preview-images-btn:hover{background:#553c9a;transform:translateY(-1px);box-shadow:0 4px 8px #0000001f}.section-shuffle-toggle{display:flex;align-items:center}.shuffle-checkbox{display:flex;align-items:center;gap:8px;cursor:pointer;-webkit-user-select:none;user-select:none;font-weight:500}.shuffle-checkbox input[type=checkbox]{position:absolute;opacity:0;width:0;height:0}.shuffle-checkbox .checkbox-custom{width:18px;height:18px;border:2px solid #667eea;border-radius:4px;background:#fff;transition:all .2s ease;position:relative}.section-page.dark-mode .shuffle-checkbox .checkbox-custom{background:#2d3748;border-color:#a78bfa}.shuffle-checkbox input:checked+.checkbox-custom{background:#667eea;border-color:#667eea}.section-page.dark-mode .shuffle-checkbox input:checked+.checkbox-custom{background:#a78bfa;border-color:#a78bfa}.shuffle-checkbox input:checked+.checkbox-custom:after{content:"✓";position:absolute;top:-2px;left:2px;color:#fff;font-size:12px;font-weight:700}.shuffle-label{font-size:14px;color:#4a5568;font-weight:500}.section-page.dark-mode .shuffle-label{color:#e2e8f0}.difficulty-controls{display:grid;gap:16px}.difficulty-group{background:#00000005;border-radius:10px;padding:16px;border:1px solid rgba(0,0,0,.06);transition:all .2s ease}.section-page.dark-mode .difficulty-group{background:#ffffff08;border-color:#ffffff14}.difficulty-group:hover{background:#0000000a;border-color:#00000014}.section-page.dark-mode .difficulty-group:hover{background:#ffffff0d;border-color:#ffffff1f}.difficulty-header{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px;flex-wrap:nowrap}.difficulty-icon{font-size:14px;flex-shrink:0;order:1}.difficulty-info{display:flex;align-items:center;justify-content:center;gap:8px;flex:1;min-width:0;order:2}.difficulty-name{font-weight:500;color:#4a5568;font-size:14px;flex-shrink:0;text-align:center}.section-page.dark-mode .difficulty-name{color:#e2e8f0}.difficulty-counter{font-size:12px;color:#718096;font-weight:500;background:#0000000d;padding:4px 8px;border-radius:8px;border:1px solid rgba(0,0,0,.1);flex-shrink:0;order:3}.section-page.dark-mode .difficulty-counter{color:#a0aec0;background:#ffffff0d;border-color:#ffffff1a}.slider-container{display:flex;align-items:center;gap:12px}.control-button{width:28px;height:28px;border:none;border-radius:50%;background:#4c51bf;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:14px;font-weight:700;transition:all .2s ease;flex-shrink:0}.control-button:hover:not(:disabled){background:#553c9a;transform:scale(1.1)}.control-button:disabled{background:#cbd5e0;cursor:not-allowed;transform:none}.section-page.dark-mode .control-button{background:#a78bfa}.section-page.dark-mode .control-button:hover:not(:disabled){background:#8b5cf6}.section-page.dark-mode .control-button:disabled{background:#4a5568}.question-slider{flex:1;height:4px;border-radius:2px;background:#e2e8f0;outline:none;transition:all .2s ease;cursor:pointer}.section-page.dark-mode .question-slider{background:#4a5568}.question-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:#4c51bf;cursor:pointer;transition:all .2s ease;box-shadow:0 1px 3px #0003}.question-slider::-webkit-slider-thumb:hover{background:#553c9a;transform:scale(1.1);box-shadow:0 2px 6px #00000040}.question-slider::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:#4c51bf;cursor:pointer;border:none;transition:all .2s ease;box-shadow:0 1px 3px #0003}.question-slider::-moz-range-thumb:hover{background:#553c9a;transform:scale(1.1);box-shadow:0 2px 6px #00000040}.range-selection{background:#00000005;border-radius:10px;padding:16px;border:1px solid rgba(0,0,0,.06);transition:all .2s ease}.section-page.dark-mode .range-selection{background:#ffffff08;border-color:#ffffff14}.range-header{display:flex;align-items:center;gap:12px;margin-bottom:16px}.range-icon{font-size:16px}.range-info{flex:1;display:flex;flex-direction:column;gap:4px}.range-name{font-weight:600;font-size:14px;color:#2d3748}.section-page.dark-mode .range-name{color:#e2e8f0}.range-counter{font-size:12px;color:#718096;font-weight:500}.section-page.dark-mode .range-counter{color:#a0aec0}.range-controls{display:flex;flex-direction:column;gap:16px}.range-group{display:flex;flex-direction:column;gap:8px}.range-label{font-size:12px;font-weight:600;color:#4a5568;text-transform:uppercase;letter-spacing:.5px}.section-page.dark-mode .range-label{color:#cbd5e0}.range-value{font-size:12px;font-weight:600;color:#4c51bf;text-align:center;min-width:40px}.section-page.dark-mode .range-value{color:#a78bfa}.action-section-top{display:flex;justify-content:center;padding:20px 0;margin-bottom:30px}.action-section{display:flex;justify-content:center;padding:20px 0}.start-exam-btn{display:flex;align-items:center;gap:16px;padding:20px 48px;background:linear-gradient(135deg,#4caf50,#45a049,#2e7d32);color:#fff;border:none;border-radius:20px;font-size:20px;font-weight:700;cursor:pointer;transition:all .4s cubic-bezier(.25,.46,.45,.94);box-shadow:0 8px 32px #4caf504d;position:relative;overflow:hidden;letter-spacing:.5px;text-transform:uppercase}.start-exam-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .6s ease}.start-exam-btn:hover:not(:disabled):before{left:100%}.start-exam-btn:hover:not(:disabled){transform:translateY(-4px) scale(1.05);box-shadow:0 12px 40px #4caf5066}.start-exam-btn:disabled{background:linear-gradient(135deg,#ccc,#bbb);cursor:not-allowed;transform:none;box-shadow:none;opacity:.6}.start-exam-btn:disabled:before{display:none}.btn-text{font-size:18px}.btn-icon{font-size:16px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.modal-content{background:#fff;border-radius:20px;max-width:90vw;max-height:90vh;overflow:hidden;box-shadow:0 20px 60px #0000004d;display:flex;flex-direction:column}.section-page.dark-mode .modal-content{background:#2d2d30;color:#e0e0e0}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px 25px;border-bottom:1px solid #eee;background:#f8f9ff}.section-page.dark-mode .modal-header{background:#3a3a3d;border-bottom-color:#555}.modal-title{margin:0;font-size:18px;font-weight:600;color:#333}.section-page.dark-mode .modal-title{color:#e0e0e0}.modal-close-btn{background:none;border:none;font-size:24px;cursor:pointer;color:#666;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .3s ease}.modal-close-btn:hover{background:#f0f0f0;color:#333}.section-page.dark-mode .modal-close-btn{color:#999}.section-page.dark-mode .modal-close-btn:hover{background:#4a4a4d;color:#e0e0e0}.modal-body{flex:1;display:flex;align-items:center;justify-content:center;padding:20px;overflow:hidden}.modal-image{max-width:100%;max-height:100%;object-fit:contain;border-radius:10px;box-shadow:0 5px 20px #0003}.modal-footer{padding:20px 25px;border-top:1px solid #eee;background:#f8f9ff}.section-page.dark-mode .modal-footer{background:#3a3a3d;border-top-color:#555}.image-navigation{display:flex;justify-content:space-between;align-items:center}.nav-btn{background:#4b3ee6;color:#fff;border:none;border-radius:8px;padding:8px 16px;cursor:pointer;font-size:14px;font-weight:500;transition:all .3s ease}.nav-btn:hover:not(:disabled){background:#5a4fcf;transform:translateY(-1px)}.nav-btn:disabled{background:#ccc;cursor:not-allowed;transform:none}.image-counter{font-size:14px;color:#666;font-weight:500}.section-page.dark-mode .image-counter{color:#999}@media (max-width: 768px){.section-header{padding:12px 16px;overflow-x:auto;overflow-y:hidden;white-space:nowrap;scrollbar-width:none;-ms-overflow-style:none;height:8vh;max-height:70px;min-height:50px}.section-header::-webkit-scrollbar{display:none}.quiz-config-bar{flex-direction:column;gap:16px;align-items:stretch}.config-controls{justify-content:space-between;gap:16px}.sections-grid{grid-template-columns:1fr;gap:16px}.section-content{padding:16px;padding-top:calc(8vh + 35px)}.section-card{padding:20px}.page-title{font-size:18px}.title-icon{font-size:20px}.section-card-header{flex-direction:column;gap:12px;align-items:stretch}.difficulty-controls{gap:12px}.difficulty-group{padding:12px}.start-exam-btn{padding:15px 30px;font-size:16px}.modal-content{margin:10px;max-width:calc(100vw - 20px);max-height:calc(100vh - 20px)}}@media (max-width: 480px){.section-header{padding:12px 16px;height:8vh;max-height:60px;min-height:50px}.header-controls{gap:8px}.selection-summary{padding:6px 10px;min-width:60px}.summary-text{font-size:14px}.summary-label{font-size:9px}.theme-toggle-btn{padding:8px 12px;font-size:14px}.quiz-config-bar{padding:16px}.config-controls{flex-direction:column;gap:12px}.config-item{justify-content:space-between;width:100%}.section-content{padding:16px 12px;padding-top:calc(8vh + 30px)}.section-card{padding:16px}.section-name{font-size:16px}.difficulty-header{flex-wrap:nowrap;gap:6px}.difficulty-info{gap:6px}.difficulty-name{font-size:13px}.difficulty-counter{font-size:11px;padding:2px 6px}.slider-container{gap:8px}.control-button{width:24px;height:24px;font-size:12px}.start-exam-btn{padding:14px 28px;font-size:16px}.btn-text{font-size:16px}.modal-header,.modal-footer{padding:15px 20px}.modal-body{padding:15px}.image-navigation{flex-direction:column;gap:10px}.nav-btn{padding:6px 12px;font-size:12px}}@font-face{font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff) format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf) format("truetype")}@font-face{font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf) format("truetype")}@font-face{font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf) format("truetype")}@font-face{font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff) format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf) format("truetype")}@font-face{font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff) format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff) format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff) format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff) format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff) format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf) format("truetype")}@font-face{font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff) format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf) format("truetype")}@font-face{font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff) format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf) format("truetype")}@font-face{font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff) format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf) format("truetype")}@font-face{font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff) format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf) format("truetype")}@font-face{font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff) format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf) format("truetype")}@font-face{font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff) format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf) format("truetype")}@font-face{font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff) format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf) format("truetype")}@font-face{font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff) format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf) format("truetype")}@font-face{font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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) format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff) format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf) format("truetype")}@font-face{font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff) format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf) format("truetype")}@font-face{font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff) format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.22"}.katex .katex-mathml{clip:rect(1px,1px,1px,1px);border:0;height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.6666666667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}.question-box{background:#fff;border-radius:12px;box-shadow:0 4px 20px #0000001a;height:100%;overflow:hidden;display:flex;flex-direction:column;transition:background-color .3s ease,color .3s ease;will-change:transform;contain:content}.dark-mode .question-box{background:#2d2d30;color:#e0e0e0;box-shadow:0 4px 20px #0000004d}.dark-mode .q-header{background:transparent;color:#e0e0e0}.dark-mode .mark-review{color:#e0e0e0}.dark-mode .mark-review:hover{background:#555}.dark-mode .q-text{color:#e0e0e0}.dark-mode .option{background:#404040;border:1px solid #555;color:#e0e0e0}.dark-mode .option:hover{background:#4a4a4a}.dark-mode .option.active{background:#5a4fcf;border-color:#5a4fcf;color:#fff}.option.correct-answer{background:#d4edda!important;border-color:#28a745!important;color:#155724!important;font-weight:600}.dark-mode .option.correct-answer{background:#155724!important;border-color:#28a745!important;color:#d4edda!important}.correct-indicator{font-weight:700;color:#28a745;margin-left:auto;margin-right:8px;float:right}.option-tick{color:#4b3ee6;font-size:20px;font-weight:700;margin-left:auto;display:flex;align-items:center;justify-content:center;width:24px;height:24px;background:#4b3ee61a;border-radius:50%;transition:all .2s ease}.dark-mode .option-tick{color:#a78bfa;background:#a78bfa1a}.explanation-section{background:#e8f7e9;padding:16px;margin-top:20px;border-radius:10px;border-left:4px solid #28a745;box-shadow:0 2px 8px #0000001a}.dark-mode .explanation-section{background:#1a4d1a;border-left:4px solid #28a745;color:#e0e0e0}.explanation-header{font-size:16px;color:#155724;font-weight:700;margin-bottom:10px}.dark-mode .explanation-header{color:#d4edda}.explanation-content{font-size:14px;line-height:1.6;color:#333;text-align:left!important}.explanation-content *{text-align:left!important}.dark-mode .explanation-content{color:#e0e0e0}.question-scroll{flex:1;overflow-y:auto;padding:8px 28px 28px;animation:fadeIn .3s ease;scroll-behavior:smooth;transform:translateZ(0);-webkit-overflow-scrolling:touch}.question-scroll::-webkit-scrollbar{width:0;height:0;display:none}.question-scroll{scrollbar-width:none;-ms-overflow-style:none}.question-box.bold-mode .q-text,.question-box.bold-mode .q-text *,.question-box.bold-mode .option,.question-box.bold-mode .option *,.question-box.bold-mode .explanation-content,.question-box.bold-mode .explanation-content *{font-weight:700!important}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.q-header{background:transparent;color:#333;padding:10px 15px;font-weight:700;display:flex;justify-content:space-between;align-items:center;transition:background-color .3s ease,color .3s ease}.header-actions{display:flex;gap:10px;align-items:center}.q-number{font-size:18px;font-weight:700;color:#333}.dark-mode .q-number{color:#fff}.show-answer{background:#4caf50;color:#fff;padding:5px 10px;border-radius:15px;cursor:pointer;font-size:14px;border:none;transition:background .3s}.show-answer:hover{background:#45a049}.fifty-fifty{background:#ff9800;color:#fff;padding:5px 10px;border-radius:15px;cursor:pointer;font-size:12px;font-weight:700;border:none;transition:background .3s;margin:0 5px}.fifty-fifty:hover:not(.used){background:#f57c00}.fifty-fifty.used{background:#9e9e9e;cursor:not-allowed;opacity:.6}.hidden-option{position:relative}.crossed-out{color:#f44336;font-size:16px;margin-left:10px}.dark-mode .show-answer{color:#4dabf7;border:1px solid #4dabf7}.dark-mode .show-answer:hover{background:#4dabf71a}.mark-review{background:transparent;color:#333;border:1px solid #333;padding:6px 12px;border-radius:6px;cursor:pointer;font-size:12px;font-weight:700;transition:all .2s ease}.dark-mode .mark-review{color:#fff;border:1px solid white}.mark-review:hover{background:#0000001a}.dark-mode .mark-review:hover{background:#ffffff1a}.q-text{font-size:18px;line-height:1.6;margin-bottom:24px;color:#333;text-align:left!important}.q-text *{text-align:left!important}.options{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media (max-width: 768px){.options{display:flex;flex-direction:column;gap:14px}}.option{position:relative;padding:16px 18px;border-radius:10px;background:#f5f7fa;border:2px solid transparent;cursor:pointer;font-size:16px;transition:all .2s ease-in-out;color:#333;box-shadow:0 1px 4px #0000000d;will-change:transform,background-color}.option *{text-align:left!important}.option:hover{background:#eaf0ff;transform:translateY(-1px);box-shadow:0 2px 8px #0000000f}.option.active{background:#e0e7ff;border-color:#4b3ee6;font-weight:600;box-shadow:0 2px 10px #4b3ee626}.section-name-display{position:sticky;top:0;z-index:90;padding:10px 15px;background:#fffffff2;border-bottom:1px solid #eee;display:flex;justify-content:flex-start;width:100%;min-height:50px;align-items:center;overflow:hidden}.section-navigation-horizontal{display:flex;gap:8px;overflow-x:auto;overflow-y:hidden;scrollbar-width:thin;scrollbar-color:rgba(0,0,0,.2) transparent;flex-wrap:nowrap;width:100%;padding:2px 0;scroll-behavior:smooth}.section-navigation-horizontal::-webkit-scrollbar{height:4px}.section-navigation-horizontal::-webkit-scrollbar-track{background:transparent}.section-navigation-horizontal::-webkit-scrollbar-thumb{background:#0003;border-radius:2px}.section-navigation-horizontal::-webkit-scrollbar-thumb:hover{background:#0006}.section-nav-item-horizontal{background:transparent;color:#333;border:1px solid #333;padding:6px 12px;border-radius:6px;cursor:pointer;font-size:12px;font-weight:700;transition:all .2s ease;white-space:nowrap;flex-shrink:0;display:flex;flex-direction:row;align-items:center;gap:6px}.section-nav-item-horizontal:hover{background:#0000001a}.section-nav-item-horizontal.active{background:#007bff;color:#fff;border-color:#007bff}.section-nav-item-horizontal .section-nav-name{font-weight:700;font-size:11px;line-height:1.2}.section-nav-item-horizontal .section-nav-range{font-size:10px;opacity:.8;font-weight:400}.section-nav-item-horizontal.active .section-nav-range{opacity:1}.dark-mode .section-name-display{background:transparent;border-bottom-color:#555}.dark-mode .section-nav-item-horizontal{color:#e0e0e0;border:1px solid #e0e0e0}.dark-mode .section-nav-item-horizontal:hover{background:#ffffff1a}.dark-mode .section-nav-item-horizontal.active{background:#007bff;color:#fff;border-color:#007bff}.section-placeholder{display:none}.dark-mode .section-name-display{background:#3a3a3d;border-bottom-color:#555}.dark-mode .section-navigation-horizontal{scrollbar-color:rgba(255,255,255,.3) transparent}.dark-mode .section-navigation-horizontal::-webkit-scrollbar-thumb{background:#ffffff4d}.dark-mode .section-navigation-horizontal::-webkit-scrollbar-thumb:hover{background:#ffffff80}.control-buttons{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.dark-mode .fifty-fifty-btn{background:linear-gradient(135deg,#ff9800,#f57c00)}.dark-mode .fifty-fifty-used{background:#66bb6a}.dark-mode .option-fifty-fifty-hidden{background:linear-gradient(135deg,#4d1a1a,#5a2a2a)!important;border-color:#f44336!important}.dark-mode .option-fifty-fifty-hidden .option-label{background:#f44336!important;color:#fff!important}.dark-mode .red-fifty{color:#ff5252}.dark-mode .hidden-text{color:#666}.show-answer-btn,.review-btn{padding:8px 14px;border-radius:6px;font-size:14px;font-weight:700;cursor:pointer;border:none;background:#4b3ee6;color:#fff;transition:all .3s ease}.show-answer-btn:hover,.review-btn:hover{background:#372cb0}.option.wrong-option,.option.previous-answer{background:linear-gradient(135deg,#ffeaea,#fdd4d4)!important;border-color:#f44336!important}.dark-mode .option.wrong-option,.dark-mode .option.previous-answer{background:#404040!important;border-color:#f44336!important;border-width:2px!important;color:#e0e0e0!important}.question-viewer.dark-mode .option-fifty-fifty-hidden{background:#404040!important;border-color:#f44336!important;border-width:2px!important}.question-viewer.dark-mode .option-fifty-fifty-hidden .option-label{background:#f44336!important;color:#fff!important}.question-viewer.dark-mode .red-fifty{color:#ff5252}.q-text{font-size:1.1rem;line-height:1.6;color:#2c3e50;margin-bottom:1.5rem;padding:.5rem 0}.q-text p{margin-bottom:1rem}.q-text p:last-child{margin-bottom:0}.q-text img,.explanation-content img{max-width:100%;height:auto;min-height:200px;max-height:400px;width:auto;margin:15px 0;border:2px solid #ddd;border-radius:8px;display:block;object-fit:contain;background-color:#f8f9fa;box-shadow:0 2px 8px #0000001a}.option span img{max-width:100%;height:auto;min-height:80px;max-height:200px;width:auto;margin:8px 0;border:1px solid #ddd;border-radius:6px;display:block;object-fit:contain;background-color:#f8f9fa;box-shadow:0 1px 4px #0000001a}.dark-mode .q-text img,.dark-mode .explanation-content img{border-color:#555!important;background-color:#404040!important;box-shadow:0 2px 8px #0000004d!important}.dark-mode .option span img{border-color:#555!important;background-color:#404040!important;box-shadow:0 1px 4px #0000004d!important}.question-navigator{display:flex;flex-direction:column;height:100%;overflow:hidden;background:#fffffff2;border-radius:12px;border:1px solid rgba(102,126,234,.1);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.navigator-grid{overflow-y:auto;min-height:0;flex:1;padding:16px;display:grid;grid-template-columns:repeat(auto-fill,minmax(40px,1fr));gap:12px;justify-content:center;scrollbar-width:none;-ms-overflow-style:none}.navigator-grid::-webkit-scrollbar{width:0;height:0;display:none}.nav-dot{width:40px;height:40px;border-radius:50%;font-weight:700;font-size:14px;border:2px solid transparent;color:#fff;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;position:relative;box-shadow:0 2px 8px #0000001a}.nav-dot:hover{transform:scale(1.1);box-shadow:0 4px 12px #0003}.nav-dot.answered{background:linear-gradient(135deg,#28a745,#20c997)}.nav-dot.not-visited{background:linear-gradient(135deg,#6c757d,#495057)}.nav-dot.review{background:linear-gradient(135deg,#007bff,#0056b3)}.nav-dot.review-answered{background:linear-gradient(135deg,#fd7e14,#e55a4e)}.nav-dot.active{background:linear-gradient(135deg,#6f42c1,#5a32a3);border-color:#fff;box-shadow:0 0 20px #6f42c180}.legend{margin-top:auto;padding:16px;border-top:1px solid rgba(102,126,234,.1);background:#f8f9facc}.legend-row{display:flex;gap:8px;justify-content:center;align-items:center;flex-wrap:wrap;margin-bottom:8px}.legend-row:last-child{margin-bottom:0}.legend-pill{font-size:11px;padding:6px 12px;border-radius:20px;font-weight:600;color:#fff;white-space:nowrap;transition:all .2s ease;display:flex;align-items:center;gap:6px;cursor:pointer;-webkit-user-select:none;user-select:none;box-shadow:0 2px 4px #0000001a}.legend-pill.answered{background:linear-gradient(135deg,#28a745,#20c997)}.legend-pill.review{background:linear-gradient(135deg,#007bff,#0056b3)}.legend-pill.review-answered{background:linear-gradient(135deg,#fd7e14,#e55a4e)}.legend-pill.not-visited{background:linear-gradient(135deg,#6c757d,#495057)}.legend-pill.current,.legend-pill.active{background:linear-gradient(135deg,#6f42c1,#5a32a3);cursor:default}.legend-pill input[type=checkbox]{width:14px;height:14px;cursor:pointer;accent-color:white;margin:0}.legend-pill:hover:not(.active):not(.current){opacity:.8;transform:translateY(-1px);box-shadow:0 4px 8px #00000026}.dark-mode .question-navigator{background:#1a1a2ef2;border-color:#ffffff1a}.dark-mode .legend{background:#202036cc;border-top-color:#ffffff1a}@media (max-width: 768px){.navigator-grid{grid-template-columns:repeat(auto-fill,minmax(36px,1fr));gap:10px;padding:12px}.nav-dot{width:36px;height:36px;font-size:12px}.legend{padding:12px}.legend-pill{font-size:10px;padding:4px 8px}}#scratchpad{position:fixed;top:0;left:0;z-index:998;width:100vw;height:100vh;background:transparent}.drawing-toggle{position:fixed;top:50%;left:5px;transform:translateY(-50%);z-index:1000;display:flex;flex-direction:column;gap:6px;transition:background-color .3s ease,color .3s ease}.dark-mode .drawing-toggle button{background:#404040;color:#e0e0e0;border:1px solid #555}.dark-mode .drawing-toggle button:hover{background:#4a4a4a}.dark-mode .drawing-panel{background:#2d2d30;border:1px solid #555;box-shadow:0 4px 20px #0000004d}.dark-mode .drawing-panel button{background:#404040;color:#e0e0e0;border:1px solid #555}.dark-mode .drawing-panel button:hover{background:#4a4a4a}.dark-mode .color-picker button{border:2px solid #555}.dark-mode #scratchpad{background:transparent}.drawing-toggle>button{background:#ffffffe6;border:none;padding:8px;border-radius:50%;cursor:pointer;font-size:18px;box-shadow:0 1px 5px #00000026;width:40px;height:40px;display:flex;align-items:center;justify-content:center;z-index:9999}.drawing-panel{opacity:0;max-height:0;overflow:hidden;display:flex;flex-direction:column;gap:6px;transition:all .3s ease-in-out;align-items:center}.drawing-panel.open{opacity:1;max-height:300px}.drawing-panel button{background:#fff;border:1px solid #ccc;padding:6px;border-radius:50%;font-size:16px;width:36px;height:36px;display:flex;align-items:center;justify-content:center}.drawing-panel button:hover{background:#eee}.color-picker{display:flex;flex-direction:column;gap:5px;margin:4px 0}.color-picker button{width:24px;height:24px;border-radius:50%;border:2px solid #aaa;cursor:pointer;padding:0}.drawing-panel.open{opacity:1;max-height:450px}.exam-ui{background:transparent;min-height:100vh;max-height:100vh;font-family:Segoe UI,sans-serif;display:flex;flex-direction:column;overflow:hidden;transition:background-color .3s ease,color .3s ease}.exam-ui.dark-mode{background:#1a1a1a!important;color:#e0e0e0!important;min-height:100vh!important;max-height:100vh!important;overflow:hidden!important}.exam-ui.dark-mode .exam-header{background:#1a1a2ecc!important;border-bottom:1px solid rgba(255,255,255,.05)!important;color:#fff!important}.exam-ui.dark-mode .page-title,.exam-ui.dark-mode .title-text{color:#fff!important}.exam-ui.dark-mode .timer-box{background:#e0e0e0!important;color:#2d2d30!important}.exam-ui.dark-mode .timer-box.timer-normal{background:linear-gradient(135deg,#2e7d32,#1b5e20)!important;color:#fff!important;border:1px solid rgba(76,175,80,.4)!important}.exam-ui.dark-mode .timer-box.timer-warning{background:linear-gradient(135deg,#f57c00,#e65100)!important;color:#fff!important;border:1px solid rgba(255,152,0,.4)!important}.exam-ui.dark-mode .timer-box.timer-critical{background:linear-gradient(135deg,#d32f2f,#b71c1c)!important;color:#fff!important;border:1px solid rgba(244,67,54,.4)!important}.exam-ui.dark-mode .exam-right{background:#2d2d30!important;border:2px solid #404040!important;color:#e0e0e0!important;overflow:hidden!important}.exam-ui.dark-mode .exam-footer{background:#2d2d30!important;border-top:1px solid #404040!important;color:#e0e0e0!important}.exam-ui.dark-mode .exam-footer button{background:#404040!important;color:#e0e0e0!important;border:1px solid #555!important}.exam-ui.dark-mode .primary{background:#5a4fcf!important;color:#fff!important}.exam-ui.dark-mode .submit{background:#28a745!important;color:#fff!important}.exam-ui.dark-mode .toggle-btn,.exam-ui.dark-mode .theme-toggle-btn{background:#404040!important;color:#e0e0e0!important;border:1px solid #555!important}.exam-ui.dark-mode .time-warning{border:1px solid rgba(255,255,255,.2)!important}.exam-ui.dark-mode .half-time-warning{background:#1a2a4a!important;color:#a0c0f0!important}.exam-ui.dark-mode .quarter-time-warning{background:#4a3a1a!important;color:#f0c0a0!important}.exam-ui.dark-mode .critical-time-warning{background:#4a1a1a!important;color:#f0a0a0!important}.exam-ui.dark-mode .tab-leave-warning{background:#3a1a4a!important;color:#d0a0f0!important}.exam-ui.dark-mode .exam-main-layout{background:#1a1a1a!important}.exam-header{background:linear-gradient(135deg,#667eea,#764ba2);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);color:#fff;padding:16px 24px;display:flex;justify-content:space-between;align-items:center;font-size:18px;font-weight:600;box-shadow:0 8px 32px #00000014;border-bottom:1px solid rgba(102,126,234,.1);position:sticky;top:0;z-index:100;height:8vh;max-height:80px;min-height:60px;flex-shrink:0;margin:0;width:100%;overflow-x:auto;overflow-y:hidden;white-space:nowrap;min-width:100%}@media (max-width: 768px){.section-name{max-width:50%}}@media (max-width: 480px){.section-name{max-width:40%;font-size:16px}}.timer-box{background:#667eea1a;color:#fff;padding:8px 16px;border-radius:20px;font-weight:600;font-size:14px;flex-shrink:0;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);transition:all .3s ease}.timer-box.timer-normal{background:linear-gradient(135deg,#4caf50,#2e7d32);color:#fff;border:1px solid rgba(76,175,80,.3);box-shadow:0 0 10px #4caf5033}.timer-box.timer-warning{background:linear-gradient(135deg,#ff9800,#f57c00);color:#fff;border:1px solid rgba(255,152,0,.3);box-shadow:0 0 10px #ff98004d;animation:timerWarningPulse 2s infinite}.timer-box.timer-critical{background:linear-gradient(135deg,#f44336,#d32f2f);color:#fff;border:1px solid rgba(244,67,54,.3);box-shadow:0 0 15px #f4433666;animation:timerCriticalPulse 1s infinite}@keyframes timerWarningPulse{0%,to{transform:scale(1);box-shadow:0 0 10px #ff98004d}50%{transform:scale(1.05);box-shadow:0 0 15px #ff980080}}@keyframes timerCriticalPulse{0%,to{transform:scale(1);box-shadow:0 0 15px #f4433666}50%{transform:scale(1.08);box-shadow:0 0 20px #f4433699}}@media (max-width: 480px){.timer-box{font-size:12px;padding:4px 10px}.theme-toggle-btn,.toggle-btn{padding:4px 8px;font-size:14px}}.header-gap{height:2vh;min-height:10px;max-height:20px}.exam-main-layout{flex:1;display:flex;gap:20px;overflow:hidden;padding:0 20px;height:80vh;margin-top:1vh;margin-bottom:1vh;transition:background-color .3s ease}.exam-left{flex:1;overflow-y:auto;overflow-x:hidden}.exam-right{width:365px;background:#fff;padding:20px;border-radius:12px;box-shadow:0 4px 20px #0000001a;display:flex;flex-direction:column;border:2px solid #e0e0e0;transition:all .3s ease-in-out;overflow:hidden}.exam-right:hover{box-shadow:0 4px 25px #0003}.exam-right.closed{display:none;opacity:0}.layout-footer-gap{height:2vh;min-height:10px;max-height:20px}.exam-footer{background:#fff;padding:12px 24px;display:flex;justify-content:space-between;align-items:center;border-top:1px solid #ccc;position:relative;z-index:10;height:10vh;flex-shrink:0}.footer-left{display:flex;gap:10px}.exam-footer button{padding:10px 18px;font-weight:700;border-radius:6px;border:none;cursor:pointer;transition:background .2s ease}.primary{background:#4b3ee6;color:#fff}.submit{background:#28a745;color:#fff}.toggle-btn,.theme-toggle-btn{background:#667eea1a;color:#fff;border:none;border-radius:12px;padding:10px 16px;cursor:pointer;font-size:16px;font-weight:500;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);margin-left:10px}.toggle-btn:hover,.theme-toggle-btn:hover{background:#667eea33;transform:translateY(-2px);box-shadow:0 4px 12px #667eea33}.time-warning{padding:12px;text-align:center;font-weight:700;border-radius:8px;margin:10px 20px;position:relative;width:calc(100% - 40px);z-index:20;box-shadow:0 4px 12px #00000026;display:flex;align-items:center;justify-content:center;gap:10px}.half-time-warning{background:#cce7ff;color:#004085;border-left:4px solid #007bff}.quarter-time-warning{background:#ffe6cc;color:#c40;border-left:4px solid #ff8800}.tab-leave-warning{background:#e6ccff!important;color:#60c!important;border-left:4px solid #8800ff!important;animation:tabLeaveWarningPulse 1.5s infinite!important}@keyframes tabLeaveWarningPulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.9;transform:scale(1.03);box-shadow:0 6px 20px #8800ff4d}}.critical-time-warning{background:#fcc!important;color:#c00!important;border-left:4px solid #ff0000!important;animation:criticalWarningPulse 1s infinite!important}@keyframes warningPulse{0%,to{opacity:1}50%{opacity:.8}}@keyframes criticalWarningPulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.9;transform:scale(1.02);box-shadow:0 6px 20px #ff00004d}}.time-warning .close-btn{background:transparent;border:none;font-size:18px;cursor:pointer;color:#856404;padding:0;margin-left:auto;transition:transform .2s ease}.time-warning .close-btn:hover{transform:scale(1.2)}@media (max-width: 768px){.exam-header{padding:12px 16px;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;-ms-overflow-style:none;height:8vh;max-height:70px;min-height:50px}.exam-header::-webkit-scrollbar{display:none}.exam-main-layout{gap:10px;padding:0 10px}.exam-right{width:100%;height:50%;position:fixed;bottom:0;left:0;z-index:99;border-radius:16px 16px 0 0;transform:translateY(100%);transition:transform .3s ease-in-out}.exam-right.open{transform:translateY(0)}.exam-footer{flex-direction:column;align-items:center;height:17vh}.footer-left,.footer-right{width:100%;display:flex;justify-content:center;gap:10px;margin-top:10px}.exam-footer button{width:100%}}.fullscreen-btn-container{display:flex;justify-content:center;align-items:center;position:absolute;right:10px;top:50%;transform:translateY(-50%)}.submit-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000b3;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);display:flex;align-items:center;justify-content:center;z-index:10000;animation:fadeIn .2s ease}.submit-modal-content{background:var(--bg-primary, #ffffff);border-radius:12px;box-shadow:0 20px 40px #0000004d;max-width:400px;width:90%;animation:slideIn .3s ease}.submit-modal-header{padding:20px 24px 0;text-align:center}.submit-modal-title{margin:0;font-size:20px;font-weight:600;color:var(--text-primary, #333)}.submit-modal-body{padding:16px 24px;text-align:center}.submit-modal-body p{margin:0;color:var(--text-secondary, #666);font-size:14px;line-height:1.5}.submit-modal-footer{padding:0 24px 24px;display:flex;gap:12px;justify-content:center}.submit-modal-btn{padding:12px 24px;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .2s ease;min-width:100px;justify-content:center}.cancel-btn{background:#f8f9fa;color:#6c757d;border:1px solid #dee2e6}.cancel-btn:hover{background:#e9ecef;color:#495057;transform:translateY(-1px)}.confirm-btn{background:#dc3545;color:#fff}.confirm-btn:hover{background:#c82333;transform:translateY(-1px)}.submit-modal-btn .btn-icon{font-size:16px}.dark-mode .submit-modal-content{background:var(--bg-primary, #2d2d2d);border:1px solid rgba(255,255,255,.1)}.dark-mode .submit-modal-title{color:var(--text-primary, #ffffff)}.dark-mode .submit-modal-body p{color:var(--text-secondary, #cccccc)}.dark-mode .cancel-btn{background:#495057;color:#fff;border:1px solid #6c757d}.dark-mode .cancel-btn:hover{background:#5a6268}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideIn{0%{opacity:0;transform:translateY(-20px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.theme-toggle-btn,.bold-toggle-btn{background:#6f42c11a;border:2px solid #6f42c1;color:#6f42c1;padding:8px 12px;border-radius:8px;cursor:pointer;font-size:16px;font-weight:600;transition:all .2s ease;display:flex;align-items:center;justify-content:center;min-width:44px;height:44px;box-shadow:0 2px 4px #6f42c133}.dark-mode .theme-toggle-btn,.dark-mode .bold-toggle-btn{border-color:#a78bfa}.dark-mode .theme-toggle-btn{color:#a78bfa}.dark-mode .bold-toggle-btn{color:#fff}.dark-mode .theme-toggle-btn:hover{background:#a78bfa;color:#1a1a1a}.dark-mode .bold-toggle-btn.active{background:#a78bfa;color:#fff}.result-page{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);background-attachment:fixed;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;padding:0;position:relative;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.result-page.dark-mode{background:#1a1a1a!important;color:#e0e0e0!important;min-height:100vh!important}.result-page:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 80%,rgba(120,119,198,.3) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(255,255,255,.1) 0%,transparent 50%),radial-gradient(circle at 40% 40%,rgba(120,119,198,.2) 0%,transparent 50%);pointer-events:none;z-index:0}.result-page>*{position:relative;z-index:1}.result-header{background:linear-gradient(135deg,#667eea,#764ba2);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);color:#fff;padding:16px 24px;display:flex;justify-content:space-between;align-items:center;font-size:18px;font-weight:600;box-shadow:0 8px 32px #00000014;border-bottom:1px solid rgba(102,126,234,.1);position:fixed;top:0;left:0;right:0;z-index:100;height:8vh;max-height:8vh;flex-shrink:0;margin:0;width:100%;overflow-x:auto;overflow-y:hidden;white-space:nowrap;min-width:100%}.result-page.dark-mode .result-header{background:#1a1a2ecc!important;border-bottom:1px solid rgba(255,255,255,.05)!important;color:#fff!important}.result-page.dark-mode .page-title,.result-page.dark-mode .title-text{color:#fff!important}.result-page.dark-mode .score-box{background:#e0e0e0!important;color:#2d2d30!important}.result-page.dark-mode .theme-toggle-btn,.result-page.dark-mode .bold-toggle-btn{border-color:#a78bfa!important;-webkit-backdrop-filter:blur(10px)!important;backdrop-filter:blur(10px)!important}.result-page.dark-mode .theme-toggle-btn{color:#a78bfa!important}.result-page.dark-mode .bold-toggle-btn{color:#fff!important}.result-page.dark-mode .theme-toggle-btn:hover{background:#a78bfa!important;color:#1a1a1a!important}.result-page.dark-mode .bold-toggle-btn.active{background:#a78bfa!important;color:#fff!important}.page-title{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:700;letter-spacing:-.5px;color:#fff}.title-icon{font-size:28px;filter:drop-shadow(0 2px 4px rgba(0,0,0,.2))}.title-text{max-width:60%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.score-box{background:#667eea1a;color:#fff;padding:8px 16px;border-radius:20px;font-weight:600;font-size:14px;flex-shrink:0;display:flex;align-items:center;gap:8px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1)}.score-percentage{font-size:1.2rem;font-weight:700}.score-text{font-size:.7rem;opacity:.8;text-transform:uppercase;letter-spacing:.5px}.header-controls{display:flex;align-items:center;gap:12px}.theme-toggle-btn,.bold-toggle-btn{background:#6f42c11a;border:2px solid #6f42c1;color:#6f42c1;padding:8px 12px;border-radius:8px;cursor:pointer;font-size:16px;font-weight:600;transition:all .2s ease;display:flex;align-items:center;justify-content:center;min-width:44px;height:44px;box-shadow:0 2px 4px #6f42c133;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);margin-left:10px}.theme-toggle-btn:hover{background:#6f42c1;color:#fff;transform:translateY(-1px);box-shadow:0 4px 8px #6f42c14d}.bold-toggle-btn{color:#fff}.bold-toggle-btn.active{background:#6f42c1;color:#fff;box-shadow:0 4px 8px #6f42c166}.retry-indicator{display:flex;align-items:center;justify-content:center;gap:12px;padding:16px 24px;background:linear-gradient(135deg,#e3f2fd,#bbdefb);border-radius:12px;border:2px solid #2196f3;margin-bottom:20px;box-shadow:0 4px 12px #2196f333}.retry-icon{font-size:20px;animation:spin 2s linear infinite}.retry-text{font-weight:600;color:#1976d2;font-size:16px}.retry-count{background:#2196f3;color:#fff;padding:4px 12px;border-radius:20px;font-weight:600;font-size:14px}.fifty-fifty-btn{background:linear-gradient(135deg,#ff9800,#f57c00);color:#fff;border:none;padding:8px 16px;border-radius:20px;font-weight:600;font-size:12px;cursor:pointer;transition:all .3s ease;box-shadow:0 2px 8px #ff98004d}.fifty-fifty-btn:hover{background:linear-gradient(135deg,#f57c00,#e65100);transform:translateY(-2px);box-shadow:0 4px 12px #ff980066}.fifty-fifty-used{background:#4caf50;color:#fff;padding:8px 12px;border-radius:20px;font-weight:600;font-size:12px;display:flex;align-items:center;gap:4px}.option-fifty-fifty-hidden{background:linear-gradient(135deg,#ffeaea,#fdd4d4)!important;border-color:#f44336!important;cursor:not-allowed!important;-webkit-user-select:none!important;user-select:none!important;pointer-events:none!important}.option-fifty-fifty-hidden .option-label{background:#f44336!important;color:#fff!important}.red-fifty{font-weight:700;color:#f44336;font-size:16px;margin-left:auto;display:flex;align-items:center;justify-content:center}.hidden-text{font-style:italic;color:#999;font-size:14px}.result-page.dark-mode .fifty-fifty-btn{background:linear-gradient(135deg,#ff9800,#f57c00)}.result-page.dark-mode .fifty-fifty-used{background:#66bb6a}.result-page.dark-mode .option-fifty-fifty-hidden{background:linear-gradient(135deg,#4d1a1a,#5a2a2a)!important;border-color:#f44336!important}.result-page.dark-mode .option-fifty-fifty-hidden .option-label{background:#f44336!important;color:#fff!important}.result-page.dark-mode .red-fifty{color:#ff5252}.result-page.dark-mode .hidden-text{color:#666}.result-page.dark-mode .retry-indicator{background:linear-gradient(135deg,#1a237e,#283593);border-color:#3f51b5}.result-page.dark-mode .retry-text{color:#90caf9}.fixed-controls{position:sticky;top:8vh;z-index:90;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);padding:12px 20px;margin:0;box-shadow:0 2px 15px #0000001a;display:flex;justify-content:center;width:100%}.result-page.dark-mode .fixed-controls{-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);box-shadow:0 2px 15px #0000004d!important}.filter-tabs{display:flex;background:#fff;border-radius:25px;padding:4px;box-shadow:0 8px 25px #0000001a,0 2px 8px #0000000d,inset 0 1px #fffc;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;gap:3px;position:relative}.result-page.dark-mode .filter-tabs{background:#404040!important;box-shadow:0 8px 25px #0000004d,0 2px 8px #0003,inset 0 1px #ffffff1a!important}.result-page.dark-mode .filter-tab{color:#e0e0e0!important}.result-page.dark-mode .filter-tab:hover{color:#f0f0f0!important}.result-page.dark-mode .filter-tab.active{background:linear-gradient(135deg,#5a4fcf,#4a3bb8)!important;color:#fff!important}.filter-tabs::-webkit-scrollbar{display:none}.filter-tab{padding:10px 18px;border:none;background:transparent;border-radius:20px;cursor:pointer;font-weight:600;color:#666;white-space:nowrap;flex-shrink:0;font-size:.9rem;position:relative;overflow:hidden}.filter-tab:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,#f8f9fa,#e9ecef);opacity:0}.filter-tab:hover:before{opacity:1}.filter-tab:hover{color:#333}.filter-tab.active{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;box-shadow:0 4px 15px #667eea4d,0 1px 3px #0000001a}.filter-tab.active:before{opacity:0}.main-content{flex:1;padding:20px}.performance-dashboard{max-width:1200px;margin:0 auto 40px;background:#fff;border-radius:20px;padding:30px;box-shadow:0 8px 25px #00000014,0 3px 8px #00000008,inset 0 1px #fffc}.result-page.dark-mode .performance-dashboard{background:#2d2d30!important;color:#e0e0e0!important;box-shadow:0 8px 25px #0000004d,0 3px 8px #0003,inset 0 1px #ffffff1a!important}.performance-charts{display:grid;grid-template-columns:auto 1fr auto;gap:40px;align-items:center}.circular-progress-container{display:flex;flex-direction:column;align-items:center;gap:15px}.circular-progress{position:relative;display:flex;align-items:center;justify-content:center}.progress-ring{transform:rotate(-90deg)}.progress-ring-background{opacity:.2}.result-page.dark-mode .progress-ring-background{stroke:#555!important}.progress-ring-progress{stroke-linecap:round}.progress-text{position:absolute;display:flex;flex-direction:column;align-items:center;justify-content:center}.progress-percentage{font-size:24px;font-weight:700;color:#4caf50}.result-page.dark-mode .progress-percentage{color:#66bb6a!important}.progress-label{font-size:12px;color:#666;text-transform:uppercase;letter-spacing:1px}.result-page.dark-mode .progress-label{color:#b0b0b0!important}.progress-title{font-weight:600;color:#333;text-align:center}.result-page.dark-mode .progress-title{color:#e0e0e0!important}.performance-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;min-width:200px}.stat-item{display:flex;align-items:center;gap:12px;padding:15px;border-radius:12px}.stat-item:hover{box-shadow:0 4px 12px #0000001a}.correct-stat{background:linear-gradient(135deg,#e8f5e8,#d4f6d4)}.incorrect-stat{background:linear-gradient(135deg,#ffeaea,#fdd4d4)}.skipped-stat{background:linear-gradient(135deg,#fff3e0,#ffe0b2)}.total-stat{background:linear-gradient(135deg,#e3f2fd,#bbdefb)}.result-page.dark-mode .correct-stat{background:linear-gradient(135deg,#1a4d1a,#2a5a2a)!important}.result-page.dark-mode .incorrect-stat{background:linear-gradient(135deg,#4d1a1a,#5a2a2a)!important}.result-page.dark-mode .skipped-stat{background:linear-gradient(135deg,#4d3a1a,#5a4a2a)!important}.result-page.dark-mode .total-stat{background:linear-gradient(135deg,#1a3a4d,#2a4a5a)!important}.stat-icon{font-size:20px;opacity:.8}.stat-content{display:flex;flex-direction:column}.stat-number{font-size:18px;font-weight:700;color:#333}.result-page.dark-mode .stat-number{color:#e0e0e0!important}.stat-label{font-size:12px;color:#666;text-transform:uppercase;letter-spacing:.5px}.result-page.dark-mode .stat-label{color:#b0b0b0!important}.breakdown-bar-container{display:flex;flex-direction:column;gap:15px;min-width:300px}.breakdown-title{font-weight:600;color:#333;text-align:center}.result-page.dark-mode .breakdown-title{color:#e0e0e0!important}.breakdown-bar{height:12px;border-radius:6px;overflow:hidden;display:flex;background:#f0f0f0;box-shadow:inset 0 1px 3px #0000001a}.result-page.dark-mode .breakdown-bar{background:#404040!important}.breakdown-segment{height:100%}.breakdown-segment:hover{filter:brightness(1.1)}.correct-segment{background:linear-gradient(135deg,#4caf50,#45a049)}.incorrect-segment{background:linear-gradient(135deg,#f44336,#d32f2f)}.skipped-segment{background:linear-gradient(135deg,#ff9800,#f57c00)}.breakdown-legend{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}.legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#666}.result-page.dark-mode .legend-item{color:#b0b0b0!important}.legend-color{width:12px;height:12px;border-radius:2px}.correct-color{background:#4caf50}.incorrect-color{background:#f44336}.skipped-color{background:#ff9800}.performance-chart-toggle{max-width:1200px;margin:40px auto;display:flex;justify-content:center;padding:0 20px}.toggle-slider-container{display:flex;align-items:center;gap:15px;background:#fff;padding:15px 25px;border-radius:25px;box-shadow:0 8px 25px #00000014,0 3px 8px #00000008,inset 0 1px #fffc;cursor:pointer}.result-page.dark-mode .toggle-slider-container{background:#2d2d30!important;color:#e0e0e0!important;box-shadow:0 8px 25px #0000004d,0 3px 8px #0003,inset 0 1px #ffffff1a!important}.toggle-slider-container:hover{box-shadow:0 12px 30px #0000001f,0 6px 12px #0000000d}.result-page.dark-mode .toggle-slider-container:hover{box-shadow:0 12px 30px #0006,0 6px 12px #0000004d!important}.toggle-label{font-weight:600;color:#333;font-size:1.1rem}.result-page.dark-mode .toggle-label{color:#e0e0e0!important}.slider-toggle{position:relative;width:60px;height:30px;background:linear-gradient(135deg,#e0e0e0,#f0f0f0);border-radius:25px;cursor:pointer;box-shadow:inset 0 2px 4px #0000001a}.result-page.dark-mode .slider-toggle{background:linear-gradient(135deg,#404040,#505050)!important}.slider-thumb{position:absolute;top:3px;left:3px;width:24px;height:24px;background:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 4px #0003}.result-page.dark-mode .slider-thumb{background:#f0f0f0!important}.slider-thumb.active{transform:translate(30px);background:linear-gradient(135deg,#4caf50,#45a049);box-shadow:0 4px 8px #4caf504d}.result-page.dark-mode .slider-thumb.active{background:linear-gradient(135deg,#66bb6a,#4caf50)!important}.slider-icon{font-size:10px;color:#666}.slider-thumb.active .slider-icon{color:#fff}.toggle-status{font-size:.9rem;color:#666;font-weight:500;min-width:40px}.result-page.dark-mode .toggle-status{color:#b0b0b0!important}.performance-dashboard-wrapper{transform-origin:top}@media (max-width: 768px){.performance-charts{grid-template-columns:1fr;gap:30px;text-align:center}.performance-stats{grid-template-columns:repeat(2,1fr);gap:15px}.breakdown-bar-container{min-width:auto}.breakdown-legend{justify-content:center}.toggle-slider-container{padding:12px 20px;gap:12px}.toggle-label{font-size:1rem}.slider-toggle{width:50px;height:26px}.slider-thumb{width:20px;height:20px;top:3px}.slider-thumb.active{transform:translate(24px)}}@media (max-width: 480px){.performance-dashboard{padding:20px 15px}.performance-stats{grid-template-columns:1fr;gap:12px}.stat-item{padding:12px}.breakdown-legend{flex-direction:column;align-items:center}.performance-chart-toggle{padding:0 15px;margin:30px auto}.toggle-slider-container{padding:10px 15px;gap:10px;flex-wrap:wrap;justify-content:center}.toggle-label{font-size:.9rem}.slider-toggle{width:45px;height:24px}.slider-thumb{width:18px;height:18px}.slider-thumb.active{transform:translate(21px)}.toggle-status{font-size:.8rem}}.single-question-container{max-width:1200px;margin:0 auto;padding-top:20px}.question-navigation-header{display:flex;justify-content:space-between;align-items:center;margin-top:20px;margin-bottom:20px;padding:0 20px}.nav-arrow{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 24px;border-radius:25px;font-weight:600;cursor:pointer;font-size:16px;transition:all .3s ease;box-shadow:0 4px 15px #667eea4d}.nav-arrow:hover:not(:disabled){background:linear-gradient(135deg,#5a67d8,#6b46c1);box-shadow:0 6px 20px #667eea66;transform:translateY(-2px)}.nav-arrow:disabled{background:#ccc;cursor:not-allowed;box-shadow:none;transform:none}.result-page.dark-mode .nav-arrow{background:linear-gradient(135deg,#4a5568,#2d3748)}.result-page.dark-mode .nav-arrow:hover:not(:disabled){background:linear-gradient(135deg,#5a67d8,#6b46c1)}.result-page.dark-mode .nav-arrow:disabled{background:#4a5568;color:#a0aec0}.question-counter{background:#fff;padding:12px 24px;border-radius:25px;font-weight:600;color:#333;box-shadow:0 4px 15px #0000001a;border:2px solid rgba(102,126,234,.1)}.result-page.dark-mode .question-counter{background:#2d2d30;color:#e0e0e0;border:2px solid rgba(255,255,255,.1)}.current-question-wrapper{animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}.questions-container{max-width:1200px;margin:0 auto;display:grid;gap:25px;padding-top:20px}.question-card,.result-card{background:#fff;border-radius:20px;padding:30px;box-shadow:0 8px 25px #00000014,0 3px 8px #00000008,inset 0 1px #fffc;position:relative;overflow:hidden;border:1px solid rgba(255,255,255,.2)}.result-page.dark-mode .question-card{background:#2d2d30!important;color:#e0e0e0!important;box-shadow:0 8px 25px #0000004d,0 3px 8px #0003,inset 0 1px #ffffff1a!important;border:1px solid rgba(255,255,255,.1)!important}.result-page.dark-mode .question-text,.result-page.dark-mode .question-text *{color:#e0e0e0!important}.result-page.dark-mode .option{background:#404040!important;color:#e0e0e0!important}.result-page.dark-mode .option-text,.result-page.dark-mode .option-text *{color:#e0e0e0!important}.result-page.dark-mode .no-results{background:#2d2d30!important;color:#e0e0e0!important}.result-page.dark-mode .no-results-text{color:#b0b0b0!important}.result-page.dark-mode .explanation{background:linear-gradient(135deg,#1a4d4d,#2a5555)!important;border:2px solid #4a8080!important;color:#e0e0e0!important}.result-page.dark-mode .explanation-header{color:#6db3f2!important}.result-page.dark-mode .explanation-text,.result-page.dark-mode .explanation-text *{color:#e0e0e0!important}.result-page.dark-mode .review-note{background:linear-gradient(135deg,#4a3d1a,#5a4d2a)!important;border:2px solid #8a7a3a!important;color:#f0e0a0!important}.question-text img,.explanation-text img{max-width:100%;height:auto;min-height:200px;max-height:400px;width:auto;margin:15px 0;border:2px solid #ddd;border-radius:8px;display:block;object-fit:contain;background-color:#f8f9fa;box-shadow:0 2px 8px #0000001a}.option-text img{max-width:100%;height:auto;min-height:80px;max-height:200px;width:auto;margin:8px 0;border:1px solid #ddd;border-radius:6px;display:block;object-fit:contain;background-color:#f8f9fa;box-shadow:0 1px 4px #0000001a}.result-page.dark-mode .question-text img,.result-page.dark-mode .explanation-text img{border-color:#555!important;background-color:#404040!important;box-shadow:0 2px 8px #0000004d!important}.result-page.dark-mode .option-text img{border-color:#555!important;background-color:#404040!important;box-shadow:0 1px 4px #0000004d!important}.result-page.dark-mode .katex,.result-page.dark-mode .katex *,.result-page.dark-mode .katex .base,.result-page.dark-mode .katex-display,.result-page.dark-mode .katex-display *{color:#e0e0e0!important}.result-page.bold-mode .question-text,.result-page.bold-mode .question-text *,.result-page.bold-mode .option-text,.result-page.bold-mode .option-text *,.result-page.bold-mode .explanation-text,.result-page.bold-mode .explanation-text *{font-weight:700!important}.question-card:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.4),transparent)}.question-card:hover{box-shadow:0 20px 40px #0000001f,0 8px 16px #0000000f,0 2px 4px #00000008}.question-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:20px;flex-wrap:nowrap;gap:10px}.status-badges{display:flex;gap:10px;align-items:center;flex-wrap:nowrap}.question-number{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:8px 16px;border-radius:20px;font-weight:700;font-size:1.1rem}.status-badge{padding:8px 16px;border-radius:20px;font-weight:600;font-size:.9rem;position:relative;overflow:hidden;text-shadow:0 1px 2px rgba(0,0,0,.1)}.status-badge:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(45deg,transparent 30%,rgba(255,255,255,.2) 50%,transparent 70%);transform:translate(-100%)}.status-badge.correct{background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;box-shadow:0 4px 12px #4caf504d,0 2px 4px #0000001a}.status-badge.correct:hover{box-shadow:0 6px 16px #4caf5066,0 0 20px #4caf5033}.status-badge.incorrect{background:linear-gradient(135deg,#f44336,#d32f2f);color:#fff;box-shadow:0 4px 12px #f443364d,0 2px 4px #0000001a}.status-badge.incorrect:hover{box-shadow:0 6px 16px #f4433666,0 0 20px #f4433633}.status-badge.skipped{background:linear-gradient(135deg,#ffc107,#ffb300);color:#333}.status-badge.retry{background:linear-gradient(135deg,#2196f3,#1976d2);color:#fff}.retry-badge{padding:8px;border-radius:50%;font-weight:600;font-size:1.2rem;display:flex;align-items:center;justify-content:center;border:none;order:-1;height:36px;width:36px;background:transparent}.retry-badge.spinning{color:#ff9800}.retry-badge.completed{color:#4caf50}.retry-badge.spinning .retry-icon{animation:spin 1s linear infinite}.retry-badge.completed .retry-icon{animation:none}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.result-page.dark-mode .retry-badge.spinning{color:#ff9800}.result-page.dark-mode .retry-badge.completed{color:#42a5f5}.previous-mark{color:#9e9e9e;font-weight:700;margin-left:8px}.retry-mark{display:flex;align-items:center;gap:4px;margin-left:auto;font-size:1.2rem}.retry-mark span{display:inline-flex;align-items:center}.question-text{font-size:1.2rem;font-weight:600;color:#333;margin-bottom:25px;line-height:1.5;text-align:left!important}.question-text *{text-align:left!important}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-bottom:20px}@media (max-width: 768px){.options-grid{display:flex;flex-direction:column;gap:15px}}.option{display:flex;align-items:center;gap:15px;padding:15px 20px;border-radius:15px;background:#f8f9fa;border:2px solid transparent;position:relative}.option-label{background:#667eea;color:#fff;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.option-text{flex:1;font-size:1rem;color:#333;text-align:left!important}.option-text *{text-align:left!important}.correct-option{background:linear-gradient(135deg,#e8f5e8,#d4f6d4);border-color:#4caf50}.correct-option .option-label{background:#4caf50}.wrong-option{background:linear-gradient(135deg,#ffeaea,#fdd4d4)!important;border-color:#f44336!important;border-width:2px!important}.wrong-option .option-label{background:#f44336!important}.previous-answer{background:linear-gradient(135deg,#ffeaea,#fdd4d4)!important;border-color:#f44336!important;border-width:2px!important}.previous-answer .option-label{background:#f44336!important}.result-page.dark-mode .correct-option{background:#404040!important;border-color:#4caf50!important;border-width:2px!important;color:#e0e0e0!important}.result-page.dark-mode .correct-option .option-label{background:#4caf50!important;color:#fff!important}.result-page.dark-mode .wrong-option{background:#404040!important;border-color:#f44336!important;border-width:2px!important;color:#e0e0e0!important}.result-page.dark-mode .wrong-option .option-label{background:#f44336!important;color:#fff!important}.result-page.dark-mode .previous-answer{background:#404040!important;border-color:#f44336!important;border-width:2px!important;color:#e0e0e0!important}.result-page.dark-mode .previous-answer .option-label{background:#f44336!important;color:#fff!important}.user-mark,.correct-mark{font-size:1.2rem;margin-left:auto}.correct-mark{color:#4caf50;background:#fff;border-radius:50%;width:25px;height:25px;display:flex;align-items:center;justify-content:center}.review-note{background:linear-gradient(135deg,#fff3e0,#ffe0b2);border:2px solid #ff9800;border-radius:10px;padding:12px 16px;margin-bottom:20px;font-weight:600;color:#e65100}.explanation{background:linear-gradient(135deg,#e3f2fd,#bbdefb);border:2px solid #2196F3;border-radius:15px;padding:20px;margin-top:20px}.explanation-header{font-weight:700;color:#1976d2;margin-bottom:10px;font-size:1.1rem}.explanation-text{color:#333;line-height:1.6;text-align:left!important}.explanation-text *{text-align:left!important}.no-results{text-align:center;padding:60px 20px;background:#fff;border-radius:20px;box-shadow:0 8px 25px #0000001a}.no-results-icon{font-size:4rem;margin-bottom:20px;opacity:.5}.no-results-text{font-size:1.2rem;color:#666;font-weight:600}.fullscreen-btn-container{display:flex;justify-content:center;align-items:center;position:fixed;right:10px;top:50%;transform:translateY(-50%);z-index:999}.fullscreen-btn{background:#0000001a;border:1px solid rgba(0,0,0,.2);border-radius:6px;padding:6px 8px;font-size:14px;cursor:pointer;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.fullscreen-btn:hover{background-color:#3a2ecb;color:#fff;transform:scale(1.05)}.fullscreen-icon{font-size:16px;display:inline-block}.action-buttons{margin-top:30px;display:flex;gap:15px;justify-content:center}.btn-primary,.btn-secondary{padding:16px 32px;border:none;border-radius:28px;font-size:1.1rem;font-weight:600;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:10px;position:relative;overflow:hidden;text-shadow:0 1px 2px rgba(0,0,0,.1)}.btn-primary:before,.btn-secondary:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent)}.btn-primary{background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;box-shadow:0 6px 20px #4caf504d,0 2px 8px #0000001a,inset 0 1px #fff3}.btn-primary:hover{box-shadow:0 10px 30px #4caf5066,0 4px 12px #00000026}.btn-secondary{background:#fff;color:#667eea;box-shadow:0 6px 20px #00000014,0 2px 8px #0000000d,inset 0 1px #fffc;border:2px solid rgba(102,126,234,.1)}.btn-secondary:hover{box-shadow:0 10px 30px #0000001f,0 4px 12px #667eea1a;border-color:#667eea33}@media (max-width: 768px){.question-navigation-header{flex-direction:row;gap:10px;padding:0 15px;align-items:center;justify-content:space-between}.nav-arrow{padding:8px 16px;font-size:14px;min-width:90px;flex-shrink:0}.question-counter{padding:8px 16px;font-size:14px;flex-shrink:0}.result-header{padding:12px 15px;font-size:16px;width:100%;height:8vh;max-height:70px;min-height:50px;position:sticky;top:0;z-index:1000;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;-ms-overflow-style:none}.result-header::-webkit-scrollbar{display:none}.section-name{max-width:55%;font-size:16px}.score-box{padding:8px 12px;font-size:14px;min-width:80px}.score-percentage{font-size:1.1rem}.score-text{font-size:.7rem}.theme-toggle-btn{padding:8px 12px;font-size:16px;min-width:44px;min-height:44px;touch-action:manipulation}.fixed-controls{padding:12px 15px;width:100%;position:sticky;top:60px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.filter-tabs{gap:6px;padding:6px;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}.filter-tab{padding:12px 16px;font-size:14px;min-width:100px;flex-shrink:0;scroll-snap-align:start;touch-action:manipulation;border-radius:15px}.main-content{padding:15px}.result-page{padding:0;overflow-x:hidden}.question-card{padding:20px 16px;margin-bottom:16px;border-radius:16px;touch-action:manipulation}.question-header{flex-direction:row;align-items:flex-start;justify-content:space-between;gap:8px;margin-bottom:16px;flex-wrap:nowrap}.status-badges{align-items:flex-start;flex-shrink:0;justify-content:flex-end}.retry-badge{font-size:16px;padding:6px;height:32px;width:32px}.fifty-fifty-btn{padding:6px 12px;font-size:11px}.fifty-fifty-used{padding:6px 10px;font-size:10px}.question-number{padding:6px 12px;font-size:14px;align-self:flex-start}.status-badge{padding:6px 12px;font-size:12px}.question-text{font-size:16px;line-height:1.6;margin-bottom:20px}.options-grid{gap:12px}.option{padding:16px;border-radius:12px;min-height:60px;touch-action:manipulation}.option-label{width:32px;height:32px;font-size:14px;flex-shrink:0}.option-text{font-size:15px;line-height:1.4}.explanation{padding:16px;border-radius:12px;margin-top:16px}.explanation-header{font-size:16px;margin-bottom:8px}.explanation-text{font-size:14px;line-height:1.6}.review-note{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px}.action-buttons{flex-direction:row;gap:12px;padding:0 15px;margin:30px auto 20px;justify-content:center}.btn-primary,.btn-secondary{flex:1;max-width:180px;padding:16px 20px;font-size:16px;min-height:56px;border-radius:28px;touch-action:manipulation}.performance-chart-toggle{padding:0 15px;margin:30px auto}.toggle-slider-container{padding:16px 20px;gap:12px;border-radius:20px;touch-action:manipulation}.toggle-label{font-size:15px}.slider-toggle{width:52px;height:28px;touch-action:manipulation}.slider-thumb{width:22px;height:22px;top:3px}.slider-thumb.active{transform:translate(24px)}.toggle-status{font-size:14px}.performance-dashboard{padding:20px 16px;margin:0 auto 30px;border-radius:16px}@media (max-width: 480px){.question-navigation-header{gap:8px;padding:0 12px;flex-direction:row;justify-content:space-between;align-items:center}.nav-arrow{padding:8px 12px;font-size:13px;min-width:80px;flex-shrink:0}.question-counter{padding:6px 12px;font-size:13px;flex-shrink:0}.result-page{padding:0;min-height:100vh;font-size:14px}.result-header{padding:12px;width:100%;margin:0;min-height:56px;position:sticky;top:0;z-index:1000}.section-name{font-size:15px;max-width:65%}.score-box{padding:8px 10px;gap:6px;min-width:70px}.score-percentage{font-size:1rem}.score-text{font-size:.6rem}.theme-toggle-btn{padding:8px 10px;font-size:16px;min-width:40px;min-height:40px;touch-action:manipulation}.fixed-controls{padding:10px 12px;width:100%;margin:0;position:sticky;top:56px}.filter-tabs{width:100%;justify-content:flex-start;padding:4px;gap:4px}.filter-tab{padding:10px 12px;font-size:13px;min-width:80px;border-radius:12px;touch-action:manipulation}.main-content{padding:12px}.question-card{padding:16px 12px;margin-bottom:12px;border-radius:14px}.question-header{margin-bottom:12px;gap:8px}.question-number{padding:4px 10px;font-size:13px}.status-badge{padding:4px 8px;font-size:11px}.retry-badge{font-size:14px;padding:4px;height:28px;width:28px}.question-text{font-size:15px;line-height:1.5;margin-bottom:16px}.options-grid{gap:10px}.option{padding:14px 12px;border-radius:10px;min-height:54px;touch-action:manipulation}.option-label{width:28px;height:28px;font-size:13px;flex-shrink:0}.option-text{font-size:14px;line-height:1.4}.user-mark,.correct-mark{font-size:16px;width:22px;height:22px}.explanation{padding:12px;border-radius:10px;margin-top:12px}.explanation-header{font-size:14px;margin-bottom:6px}.explanation-text{font-size:13px;line-height:1.5}.review-note{padding:10px 12px;border-radius:6px;margin-bottom:12px;font-size:13px}.action-buttons{flex-direction:row;gap:10px;padding:0 12px;margin:20px auto 15px;justify-content:center}.btn-primary,.btn-secondary{flex:1;max-width:160px;padding:14px 16px;font-size:15px;min-height:50px;border-radius:25px;touch-action:manipulation}.performance-chart-toggle{padding:0 12px;margin:20px auto}.toggle-slider-container{padding:12px 16px;gap:10px;border-radius:18px;flex-wrap:wrap;justify-content:center;touch-action:manipulation}.toggle-label{font-size:14px;text-align:center;width:100%;margin-bottom:8px}.slider-toggle{width:48px;height:26px;touch-action:manipulation}.slider-thumb{width:20px;height:20px;top:3px}.slider-thumb.active{transform:translate(22px)}.toggle-status{font-size:13px;margin-top:4px}.performance-dashboard{padding:16px 12px;margin:0 auto 20px;border-radius:14px}.performance-stats{grid-template-columns:repeat(2,1fr);gap:8px}.stat-item{padding:10px 12px;border-radius:8px}.stat-number{font-size:16px}.stat-label{font-size:11px}.stat-icon{font-size:18px}.breakdown-bar-container{min-width:auto}.breakdown-title{font-size:14px;margin-bottom:10px}.breakdown-bar{height:10px;border-radius:5px}.breakdown-legend{flex-direction:column;align-items:center;gap:6px;margin-top:10px}.legend-item{font-size:11px;gap:4px}.legend-color{width:10px;height:10px}.circular-progress-container{gap:8px}.progress-title{font-size:13px}.progress-percentage{font-size:20px}.progress-label{font-size:10px}.no-results{padding:40px 16px;border-radius:16px}.no-results-icon{font-size:3rem;margin-bottom:16px}.no-results-text{font-size:15px}*{-webkit-tap-highlight-color:rgba(0,0,0,.1)}}body{background-color:#fff!important}.extractor-page{min-height:100vh;background:#fff;background-attachment:fixed;font-family:Inter,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;display:flex;flex-direction:column;transition:all .3s ease;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;position:relative;overflow-x:hidden;color:#333}.extractor-page.dark-mode{background:#fff;color:#333}.extractor-page:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 80%,rgba(102,126,234,.08) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(240,147,251,.06) 0%,transparent 50%),radial-gradient(circle at 40% 40%,rgba(118,75,162,.05) 0%,transparent 50%);pointer-events:none;z-index:0}.extractor-page.dark-mode:before{background:radial-gradient(circle at 20% 80%,rgba(26,26,46,.6) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(15,52,96,.4) 0%,transparent 50%),radial-gradient(circle at 40% 40%,rgba(22,33,62,.3) 0%,transparent 50%)}.extractor-page>*{position:relative;z-index:1}.extractor-header{background:linear-gradient(135deg,#667eea,#764ba2);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);color:#fff;padding:16px 24px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 8px 32px #00000014;border-bottom:1px solid rgba(102,126,234,.1);position:fixed;top:0;left:0;right:0;z-index:1000;height:8vh;max-height:80px;min-height:60px;overflow-x:auto;overflow-y:hidden;white-space:nowrap;width:100%}.extractor-page.dark-mode .extractor-header{background:#1a1a2ecc;border-bottom:1px solid rgba(255,255,255,.05);color:#fff}.page-title{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:700;letter-spacing:-.5px;color:#fff}.title-icon{font-size:28px;filter:drop-shadow(0 2px 4px rgba(0,0,0,.2))}.title-text{max-width:60%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.header-controls{display:flex;align-items:center;gap:16px}.theme-toggle-btn,.back-btn{background:#667eea1a;color:#fff;border:none;border-radius:12px;padding:10px 16px;cursor:pointer;font-size:16px;font-weight:500;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1)}.theme-toggle-btn:hover,.back-btn:hover{background:#667eea33;transform:translateY(-2px);box-shadow:0 4px 12px #667eea33}.extractor-content{flex:1;padding:32px 24px;padding-top:calc(8vh + 32px);max-width:1200px;margin:0 auto;width:100%}.instructions-section{background:#ffffff1a;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:24px;padding:40px;margin-bottom:32px;border:1px solid rgba(255,255,255,.2);box-shadow:0 20px 60px #0000000f;transition:all .3s ease}.extractor-page.dark-mode .instructions-section{background:#1a1a2e66;border:1px solid rgba(255,255,255,.1)}.instructions-section h2{margin:0 0 16px;font-size:32px;font-weight:800;text-align:center;letter-spacing:-1px}.instructions-section p{margin:0 0 32px;font-size:18px;text-align:center;opacity:.9}.format-examples{margin-bottom:32px}.format-example{background:#0003;border-radius:16px;padding:24px;margin-bottom:20px;border-left:4px solid #4CAF50;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.format-example h3{margin:0 0 16px;font-size:18px;font-weight:600;color:#4caf50}.example-content code{font-family:Courier New,monospace;font-size:14px;line-height:1.6;color:#ffffffe6;display:block;white-space:pre-line}.feature-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}.feature-item{display:flex;align-items:center;gap:12px;padding:16px 20px;background:#ffffff1a;border-radius:12px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1)}.feature-icon{font-size:20px;flex-shrink:0}.upload-section{background:#ffffff1a;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:24px;padding:40px;margin-bottom:32px;border:1px solid rgba(255,255,255,.2);box-shadow:0 20px 60px #0000000f}.extractor-page.dark-mode .upload-section{background:#1a1a2e66;border:1px solid rgba(255,255,255,.1)}.upload-section h3{margin:0 0 24px;font-size:24px;font-weight:700;text-align:center}.file-input-container{position:relative;margin-bottom:24px}.file-input-label{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 32px;border:3px dashed rgba(255,255,255,.3);border-radius:20px;cursor:pointer;transition:all .3s ease;background:#ffffff0d;position:relative;overflow:hidden}.file-input-label:hover{border-color:#ffffff80;background:#ffffff1a;transform:translateY(-2px);box-shadow:0 8px 24px #0000001a}.file-input-label.drag-over{border-color:#4caf50;background:#4caf5033;transform:scale(1.02);box-shadow:0 12px 32px #4caf504d}.upload-icon{font-size:48px;margin-bottom:16px;opacity:.8}.upload-text{text-align:center;display:flex;flex-direction:column;gap:8px}.primary-text{font-size:20px;font-weight:600;margin-bottom:8px}.secondary-text{font-size:16px;opacity:.8}.file-input{display:none}.file-count-badge{position:absolute;top:16px;right:16px;background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;padding:8px 12px;border-radius:20px;font-size:12px;font-weight:600;display:flex;align-items:center;gap:4px;box-shadow:0 4px 12px #4caf504d}.count-number{font-size:14px;font-weight:700}.count-text{font-size:10px;opacity:.9}.file-list{background:#ffffff1a;border-radius:16px;padding:24px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1)}.file-list h4{margin:0 0 16px;font-size:18px;font-weight:600;text-align:center}.file-items{display:flex;flex-direction:column;gap:12px}.file-item{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:#ffffff1a;border-radius:12px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);transition:all .3s ease}.file-item:hover{transform:translateY(-1px);box-shadow:0 4px 12px #0000001a}.file-info{display:flex;align-items:center;gap:12px;flex:1}.file-icon{font-size:24px;opacity:.8}.file-details{display:flex;flex-direction:column;gap:4px}.file-name{font-weight:600;font-size:14px}.file-size{font-size:12px;opacity:.7}.remove-file-btn{background:none;border:none;font-size:16px;cursor:pointer;padding:8px;border-radius:8px;transition:all .3s ease;opacity:.7}.remove-file-btn:hover{background:#ff6b6b33;opacity:1;transform:scale(1.1)}.action-section{display:flex;justify-content:center;margin-bottom:32px}.extract-btn{display:flex;align-items:center;justify-content:center;gap:12px;padding:16px 32px;background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;border:none;border-radius:16px;font-size:18px;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 8px 24px #4caf504d;min-width:200px}.extract-btn:hover:not(:disabled){transform:translateY(-3px);box-shadow:0 12px 32px #4caf5066}.extract-btn:disabled{background:linear-gradient(135deg,#ccc,#bbb);cursor:not-allowed;transform:none;box-shadow:none}.loading-spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top:2px solid white;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.btn-icon{font-size:16px}.results-section{background:#ffffff1a;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:24px;padding:40px;border:1px solid rgba(255,255,255,.2);box-shadow:0 20px 60px #0000000f}.extractor-page.dark-mode .results-section{background:#1a1a2e66;border:1px solid rgba(255,255,255,.1)}.results-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;flex-wrap:wrap;gap:16px}.results-header h3{margin:0;font-size:24px;font-weight:700}.export-btn{display:flex;align-items:center;gap:8px;padding:12px 20px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:12px;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s ease}.export-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #667eea4d}.questions-preview{display:grid;gap:20px}.more-questions{text-align:center;padding:24px;background:#ffffff0d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:16px;border:1px solid rgba(255,255,255,.1);display:flex;flex-direction:column;gap:8px}.extractor-page.dark-mode .more-questions{background:#1a1a2e33;border:1px solid rgba(255,255,255,.05)}.more-questions-text{font-size:18px;font-weight:600;color:#667eea}.extractor-page.dark-mode .more-questions-text{color:#8fa5ff}.more-questions-hint{font-size:14px;color:#888;font-style:italic}.extractor-page.dark-mode .more-questions-hint{color:#aaa}.fullscreen-btn-container{display:flex;justify-content:center;align-items:center;position:fixed;right:10px;top:50%;transform:translateY(-50%);z-index:999}.fullscreen-btn{background:#0000001a;border:1px solid rgba(0,0,0,.2);border-radius:6px;padding:6px 8px;font-size:14px;cursor:pointer;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.fullscreen-btn:hover{background-color:#3a2ecb;color:#fff;transform:scale(1.05)}.fullscreen-icon{font-size:16px;display:inline-block}.extractor-header{padding:12px 16px;height:8vh;max-height:70px;min-height:50px}.extractor-content{padding:20px 16px;padding-top:calc(8vh + 40px)}.instructions-section,.upload-section,.results-section{padding:24px 20px;border-radius:20px}.page-title{font-size:18px}.title-icon{font-size:22px}.instructions-section h2{font-size:28px}.instructions-section p{font-size:15px}.file-input-label{padding:32px 20px}.upload-icon{font-size:40px}.primary-text{font-size:18px}.secondary-text{font-size:14px}.extract-btn{width:100%;padding:16px 24px;font-size:16px}.feature-list{grid-template-columns:1fr}.results-header{flex-direction:column;align-items:stretch}.export-btn{width:100%;justify-content:center}.options-preview{grid-template-columns:1fr}@media (max-width: 480px){.extractor-header{padding:10px 12px}.header-controls{gap:8px}.theme-toggle-btn,.back-btn{padding:8px 12px;font-size:14px}.extractor-content{padding:16px 12px;padding-top:calc(8vh + 30px)}.instructions-section,.upload-section,.results-section{padding:20px 16px;border-radius:16px}.instructions-section h2{font-size:24px}.upload-section h3,.results-header h3{font-size:20px}.file-input-label{padding:28px 16px}.upload-icon{font-size:32px}.primary-text{font-size:16px}.secondary-text{font-size:13px}.extract-btn{padding:14px 20px;font-size:15px}.file-item{padding:14px 16px}.file-name{font-size:13px}.file-size{font-size:11px}.question-preview,.format-example{padding:16px}.example-content code{font-size:12px}}.no-results{text-align:center;padding:60px 20px;color:#666}.no-results-icon{font-size:4rem;margin-bottom:20px;opacity:.5}.no-results-text{font-size:1.2rem;font-weight:500}.extracted-question-card{background:linear-gradient(135deg,#e8f5e8,#f0f8f0);border-radius:20px;padding:30px;margin-bottom:20px;box-shadow:0 8px 25px #4caf5026,0 3px 8px #4caf5014,inset 0 1px #fffc;border:2px solid #4CAF50;position:relative;overflow:hidden}.extracted-question-card .question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.extracted-question-card .question-number{background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;padding:8px 16px;border-radius:20px;font-weight:700;font-size:1.1rem}.level-badge{display:flex;align-items:center;gap:8px;background:#4caf50;color:#fff;padding:8px 16px;border-radius:20px;font-weight:600;font-size:.9rem;box-shadow:0 4px 12px #4caf504d}.level-icon{font-size:1rem}.level-text{font-weight:600}.extracted-question-card .question-text{font-size:1.2rem;font-weight:600;margin-bottom:25px;color:#2e7d32;line-height:1.6}.extracted-question-card .options-grid{display:grid;gap:15px;margin-bottom:25px}.extracted-question-card .option{display:flex;align-items:center;padding:15px 20px;background:#fff;border:2px solid #e0e0e0;border-radius:15px;cursor:default;transition:all .3s ease;position:relative}.extracted-question-card .option.correct-option{background:linear-gradient(135deg,#e8f5e8,#f0f8f0);border-color:#4caf50;border-width:3px}.extracted-question-card .option-label{background:#f5f5f5;color:#333;width:35px;height:35px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1rem;margin-right:15px;flex-shrink:0}.extracted-question-card .correct-option .option-label{background:#4caf50;color:#fff}.extracted-question-card .option-text{flex:1;font-size:1rem;line-height:1.5;color:#333}.extracted-question-card .correct-mark{font-size:1.2rem;margin-left:auto;color:#4caf50;background:#fff;border-radius:50%;width:25px;height:25px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 5px #4caf504d}.extracted-question-card .explanation{background:#4caf501a;border-radius:15px;padding:20px;border-left:4px solid #4CAF50}.extracted-question-card .explanation-header{font-weight:600;color:#2e7d32;margin-bottom:10px;font-size:1rem}.extracted-question-card .explanation-text{color:#2e7d32;line-height:1.6;font-size:.95rem}.extractor-page.dark-mode .extracted-question-card{background:linear-gradient(135deg,#1e3a1e,#2d4a2d);border-color:#4caf50;color:#e8f5e8}.extractor-page.dark-mode .extracted-question-card .question-text{color:#a5d6a7}.extractor-page.dark-mode .extracted-question-card .option{background:#2d2d30;border-color:#555;color:#e0e0e0}.extractor-page.dark-mode .extracted-question-card .option.correct-option{background:#1e3a1e;border-color:#4caf50}.extractor-page.dark-mode .extracted-question-card .option-text{color:#e0e0e0}.extractor-page.dark-mode .extracted-question-card .explanation{background:#4caf5033}.extractor-page.dark-mode .extracted-question-card .explanation-header,.extractor-page.dark-mode .extracted-question-card .explanation-text{color:#a5d6a7}.App{text-align:center}.App-logo{height:40vmin;pointer-events:none}@media (prefers-reduced-motion: no-preference){.App-logo{animation:App-logo-spin infinite 20s linear}}.App-header{background-color:#282c34;min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:calc(10px + 2vmin);color:#fff}.App-link{color:#61dafb}@keyframes App-logo-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}body{margin:0;font-family:Segoe UI,sans-serif;background:#f5f6fa}.page{padding:30px}h1{color:#4b3ee6}}