body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;margin:0}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.chaptered-video-player{margin:0 auto;max-width:960px;padding:0 20px}h1,h2,h3{text-align:center}.audio-permission-banner{background-color:#f8d7da;border-radius:4px;color:#721c24;margin-bottom:15px;padding:10px;text-align:center}.enable-audio-btn{background-color:#dc3545;border:none;border-radius:3px;color:#fff;cursor:pointer;margin-left:10px;padding:4px 8px}.day-navigation{align-items:center;display:flex;justify-content:space-between;margin:20px 0}.day-nav-btn{background-color:#6c757d;border:none;border-radius:3px;color:#fff;cursor:pointer;padding:6px 12px}.day-nav-btn:hover:not(:disabled){background-color:#5a6268}.day-nav-btn:disabled{cursor:not-allowed;opacity:.6}.day-display{font-weight:700}.progress-display{align-items:center;display:flex;justify-content:space-between;margin-bottom:15px}.reset-progress-btn{background-color:#f8f9fa;border:1px solid #ced4da;border-radius:3px;cursor:pointer;font-size:12px;padding:4px 8px}.reset-progress-btn:hover{background-color:#e9ecef}.video-container{margin-bottom:20px;position:relative;width:100%}.video-container iframe{display:block;margin:0 auto;max-width:600px;width:100%}.countdown-overlay{align-items:center;background-color:#000000b3;bottom:0;color:#fff;display:flex;flex-direction:column;justify-content:center;left:0;position:absolute;right:0;top:0;z-index:10}.countdown-text{font-size:18px;margin-bottom:20px}.countdown-buttons{display:flex;gap:10px}.continue-btn{background-color:#28a745;border:none;border-radius:3px;color:#fff;cursor:pointer;padding:6px 12px}.continue-btn:hover{background-color:#218838}.cancel-btn{background-color:#dc3545;border:none;border-radius:3px;color:#fff;cursor:pointer;padding:6px 12px}.cancel-btn:hover{background-color:#c82333}.attention-modal-overlay{align-items:center;background:#00000080;bottom:0;display:flex;justify-content:center;left:0;pointer-events:all;position:fixed;right:0;top:0;z-index:1000}.attention-modal{background:#fff;border-radius:10px;box-shadow:0 4px 20px #0000004d;max-width:400px;padding:30px;pointer-events:all;text-align:center;width:90%}.attention-modal h3{color:#333;font-size:24px;margin-bottom:15px}.attention-modal p{color:#666;font-size:16px;margin-bottom:10px}.modal-timer{color:#666;font-size:18px;font-weight:700;margin:15px 0}.attention-buttons{display:flex;gap:15px;justify-content:center;margin-top:20px}.attention-btn{border:none;border-radius:5px;cursor:pointer;font-size:16px;font-weight:600;padding:10px 20px;transition:all .3s}.attention-yes{background:#4caf50;color:#fff}.attention-yes:hover{background:#45a049;box-shadow:0 4px 8px #0003;transform:translateY(-2px)}.attention-no{background:#f44336;color:#fff}.attention-no:hover{background:#da190b;box-shadow:0 4px 8px #0003;transform:translateY(-2px)}.quiz-overlay{align-items:center;background-color:#000c;bottom:0;display:flex;justify-content:center;left:0;padding:20px;position:absolute;right:0;top:0;z-index:20}.quiz-container{background-color:#fff;border-radius:8px;box-shadow:0 5px 15px #0000004d;max-height:90vh;max-width:800px;overflow-y:auto;width:100%}.quiz-header{align-items:center;background-color:#3a5998;border-top-left-radius:8px;border-top-right-radius:8px;color:#fff;display:flex;justify-content:space-between;padding:15px 20px}.quiz-header h2{font-size:1.4rem;margin:0;text-align:left}.quiz-timer{background-color:#2a4278;border-radius:4px;font-weight:700;padding:6px 12px}.quiz-content{padding:20px}.quiz-question{margin-bottom:20px}.quiz-question h3{font-size:1.2rem;margin-bottom:10px;text-align:left}.quiz-question p{background-color:#f8f9fa;border-left:4px solid #3a5998;border-radius:4px;font-size:1.1rem;padding:15px}.quiz-choices{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}.quiz-choice{align-items:flex-start;border:1px solid #ced4da;border-radius:4px;cursor:pointer;display:flex;padding:12px 15px;transition:all .2s ease}.quiz-choice input{margin-right:12px;margin-top:3px}.quiz-choice:hover:not(.correct):not(.incorrect){background-color:#f8f9fa;border-color:#adb5bd}.quiz-choice.selected{background-color:#e6f2ff;border-color:#4d90fe}.quiz-choice.correct{background-color:#d4edda;border-color:#28a745}.quiz-choice.incorrect{background-color:#f8d7da;border-color:#dc3545}.quiz-feedback{background-color:#f8f9fa;border-left:4px solid #17a2b8;border-radius:4px;margin-bottom:20px;padding:15px}.quiz-feedback-correct{border-left-color:#28a745;color:#155724}.quiz-feedback-incorrect{border-left-color:#dc3545;color:#721c24}.quiz-feedback-partial{border-left-color:#ffc107;color:#856404}.quiz-navigation{display:flex;gap:10px;justify-content:space-between;margin-bottom:20px}.quiz-button{border:none;border-radius:4px;cursor:pointer;font-weight:500;padding:8px 16px;transition:background-color .2s}.quiz-prev-btn{background-color:#6c757d;color:#fff}.quiz-prev-btn:hover:not(:disabled){background-color:#5a6268}.quiz-prev-btn:disabled{cursor:not-allowed;opacity:.6}.quiz-submit-btn{background-color:#3a5998;color:#fff}.quiz-submit-btn:hover:not(:disabled){background-color:#2a4278}.quiz-submit-btn:disabled{cursor:not-allowed;opacity:.6}.quiz-next-btn{background-color:#28a745;color:#fff}.quiz-next-btn:hover{background-color:#218838}.quiz-skip-btn{background-color:#dc3545;color:#fff}.quiz-skip-btn:hover{background-color:#c82333}.quiz-progress{margin-top:20px}.quiz-progress-bar{background-color:#e9ecef;border-radius:4px;height:8px;overflow:hidden}.quiz-progress-fill{background-color:#3a5998;border-radius:4px;height:100%}.quiz-progress-text{color:#6c757d;display:flex;font-size:.9rem;justify-content:space-between;margin-top:8px}.quiz-reset-btn{background-color:#f8f9fa;border:1px solid #ced4da;border-radius:3px;cursor:pointer;display:block;font-size:.9rem;margin-left:auto;margin-top:15px;padding:5px 10px}.quiz-reset-btn:hover{background-color:#e9ecef}.chapter-row{display:flex;flex-direction:row;flex-wrap:nowrap;gap:5px;justify-content:space-between;margin-bottom:20px}.chapter-button{background-color:#3a5998;border:none;border-radius:4px;color:#fff;cursor:pointer;flex:1 1;font-size:14px;overflow:hidden;padding:8px 12px;text-align:center;text-align:left;text-overflow:ellipsis;white-space:nowrap}.chapter-button.active{background-color:#ffc107;color:#000;font-weight:700}.chapter-button:hover{background-color:#2a4278}.chapter-button.watched:after{content:" ✓";display:inline}.chapter-nav{display:flex;gap:10px;justify-content:center;margin:20px 0}.next-chapter-btn,.prev-chapter-btn{background-color:#6c757d;border:none;border-radius:3px;color:#fff;cursor:pointer;padding:6px 12px}.next-chapter-btn:hover:not(:disabled),.prev-chapter-btn:hover:not(:disabled){background-color:#5a6268}.next-chapter-btn:disabled,.prev-chapter-btn:disabled{cursor:not-allowed;opacity:.6}.play-btn{background-color:#28a745;border:none;border-radius:3px;color:#fff;cursor:pointer;padding:6px 12px}.play-btn:hover{background-color:#218838}.test-controls{background-color:#f8f9fa;border:1px solid #dee2e6;border-radius:4px;margin:20px 0;padding:15px}.test-buttons{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}.test-buttons button{background-color:#e9ecef;border:1px solid #ced4da;border-radius:3px;cursor:pointer;padding:5px 10px}.test-buttons button:hover{background-color:#dee2e6}.enabled{background-color:#28a745!important;color:#fff}.disabled{background-color:#dc3545!important;color:#fff}.debug-logs{background-color:#f8f9fa;border:1px solid #dee2e6;font-family:monospace;font-size:12px;height:200px;overflow-y:auto;padding:10px}.log-entry{margin-bottom:2px}body:not(.pdf-visible) h2:contains("Course Materials for Day"),body:not(.pdf-visible) h2[innertext*="Course Materials for Day"]{display:none!important}body:not(.pdf-visible) div:has(>h2:contains("Course Materials for Day")),body:not(.pdf-visible) div:has(>h2[innertext*="Course Materials for Day"]){display:none!important}body:not(.pdf-visible) :contains("specified key does not exist"),body:not(.pdf-visible) div:contains("NoSuchKeyThe"){display:none!important}.dynamic-pdf-section{display:block!important}.quiz-button-inline{align-items:center;background-color:#3a5998;border:none;border-radius:4px;color:#fff;cursor:pointer;display:flex;flex:1.2 1;font-size:14px;font-weight:700;gap:10px;justify-content:center;margin:5px;padding:8px 12px;text-align:center}.quiz-button-inline:hover{background-color:#2a4278}.quiz-score{background-color:#0000001a;border-radius:10px;font-size:12px;padding:2px 6px;white-space:nowrap}.chapter-buttons{display:flex;flex-wrap:wrap;gap:5px;justify-content:stretch;margin-bottom:20px}.quiz-access{display:none}.video-quiz-flex{align-items:flex-start;display:flex;gap:0;width:100%}.video-pane{min-width:0;transition:width .4s cubic-bezier(.4,0,.2,1)}.quiz-pane{background:#fff;box-shadow:-2px 0 8px #0000000a;display:flex;flex-direction:column;justify-content:center;min-width:0;overflow-y:auto;transition:width .4s cubic-bezier(.4,0,.2,1),opacity .3s}