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h2{font-size:1.5rem;font-weight:900;margin-bottom:25px;letter-spacing:-0.5px;border-left:8px solid var(--text-main);padding-left:18px;text-transform:uppercase}.top-navigation{display:flex;justify-content:flex-end;padding:10px 0;margin-bottom:0}.top-navigation .next-btn{font-size:0.7rem;font-weight:800;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);text-decoration:none;border-bottom:1px solid var(--border-color);padding-bottom:2px;transition:all 0.2s ease}.top-navigation .next-btn:hover{color:var(--text-main);border-color:var(--text-main)}.unit{margin-bottom:30px;background:#ffffff;padding:24px;border:1px solid var(--border-color);border-radius:8px}.unit h3{font-size:1.2rem;font-weight:800;margin-bottom:15px;display:flex;justify-content:space-between;align-items:center;letter-spacing:-0.3px}.unit .unit-hours{color:var(--text-muted);font-size:0.75rem;font-weight:700;background:#f5f5f5;padding:2px 8px;border-radius:4px;text-transform:uppercase}.unit 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.paper-header .marks-info{display:flex;justify-content:space-between;margin-top:10px;font-weight:700}.question-paper .group{margin-top:30px}.question-paper .group h3{text-align:center;text-decoration:underline;font-size:1.3rem;margin-bottom:15px;text-transform:uppercase}.question-paper .group .group-info{display:flex;justify-content:space-between;margin-bottom:20px;font-weight:700;border-bottom:1px solid #000;padding-bottom:5px}.question-paper .question{margin-bottom:20px;position:relative}.question-paper .question p{margin:10px 0}.question-paper .question .marks{float:right;font-weight:700;margin-left:10px}.question-paper .question ul{list-style:none;padding-left:25px}.question-paper .question ul li{margin-bottom:8px;position:relative}.question-paper hr{border:none;border-top:2px solid #000;margin:30px 0}.question-paper em{font-style:italic;font-size:0.9rem}.question-paper .mermaid{display:flex;justify-content:center;margin:20px 0;overflow:hidden}.old-questions-list{display:grid;grid-template-columns:repeat(auto-fill, minmax(180px, 1fr));gap:20px;margin-top:25px}.old-questions-list .year-card{padding:24px;background:#ffffff;border:1px solid var(--border-color);text-align:center;text-decoration:none;color:var(--text-main);font-weight:800;transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);border-radius:8px;font-size:1.1rem;letter-spacing:-0.5px}.old-questions-list .year-card:hover{background:var(--text-main);color:#fff;transform:translateY(-4px);box-shadow:0 8px 20px rgba(0,0,0,0.1)}.quiz-btn-container{display:flex;justify-content:flex-end;margin-top:20px}.unit-quiz-btn{background:#000;color:#fff;border:none;border-radius:6px;padding:8px 16px;font-size:0.85rem;font-weight:800;display:inline-flex;align-items:center;cursor:pointer;transition:all 0.2s ease;letter-spacing:0.5px;text-transform:uppercase}.unit-quiz-btn:hover{transform:translateY(-2px);box-shadow:0 4px 15px rgba(0,0,0,0.15);background:#222}#quiz-modal{position:fixed;top:0;right:-100%;width:100%;max-width:450px;height:100vh;background:#fff;box-shadow:-10px 0 50px rgba(0,0,0,0.1);transition:right 0.4s cubic-bezier(0.25, 1, 0.5, 1);display:flex;flex-direction:column;z-index:10000}#quiz-modal.open{right:0}#quiz-modal .quiz-header{background:#000;color:#fff;padding:25px;display:flex;justify-content:space-between;align-items:center}#quiz-modal .quiz-header h2{margin:0;font-size:1.2rem;font-weight:900;letter-spacing:-0.5px}#quiz-modal .quiz-header button.close-quiz{background:none;border:none;color:#fff;cursor:pointer;padding:5px;transition:transform 0.2s ease}#quiz-modal .quiz-header button.close-quiz:hover{transform:scale(1.2)}#quiz-modal .quiz-body{padding:30px;flex-grow:1;overflow-y:auto;background:#fafafa}#quiz-modal .quiz-stats{display:flex;justify-content:space-between;font-size:0.8rem;font-weight:700;color:var(--text-muted);margin-bottom:25px;text-transform:uppercase;letter-spacing:1px}#quiz-modal .quiz-stats .stat-passes{color:#10b981}#quiz-modal .quiz-stats .stat-fails{color:#ef4444}#quiz-modal .quiz-question-container{background:#fff;padding:25px;border-radius:12px;box-shadow:0 4px 15px rgba(0,0,0,0.03);border:1px solid var(--border-color);margin-bottom:20px}#quiz-modal .quiz-question-container .question-type{font-size:0.7rem;font-weight:800;background:#000;color:#fff;padding:4px 10px;border-radius:4px;display:inline-block;margin-bottom:15px;text-transform:uppercase;letter-spacing:0.5px}#quiz-modal .quiz-question-container .question-type.type-simple{background:#3b82f6}#quiz-modal .quiz-question-container .question-type.type-moderate{background:#f59e0b}#quiz-modal .quiz-question-container .question-type.type-difficult{background:#ef4444}#quiz-modal .quiz-question-container h3{font-size:1.15rem;margin-top:0;margin-bottom:20px;line-height:1.5}#quiz-modal .quiz-options{display:flex;flex-direction:column;gap:12px}#quiz-modal .quiz-options button{background:#fff;border:1px solid var(--border-color);padding:15px;text-align:left;font-size:0.95rem;border-radius:8px;cursor:pointer;transition:all 0.2s ease;font-family:'Inter', sans-serif;font-weight:500}#quiz-modal .quiz-options button:hover{border-color:#000;background:#fcfcfc}#quiz-modal .quiz-options button.selected{background:#000;color:#fff;border-color:#000}#quiz-modal .quiz-options button.correct{background:#10b981;color:#fff;border-color:#10b981}#quiz-modal .quiz-options button.wrong{background:#ef4444;color:#fff;border-color:#ef4444}#quiz-modal .quiz-options button[disabled]{cursor:not-allowed}#quiz-modal .quiz-actions{margin-top:25px;display:flex;justify-content:space-between;align-items:center}#quiz-modal .quiz-actions .hint-btn{background:none;border:none;color:var(--text-muted);font-size:0.85rem;text-decoration:underline;cursor:pointer;font-weight:600}#quiz-modal .quiz-actions .hint-btn:hover{color:#000}#quiz-modal .quiz-actions .next-btn{background:#000;color:#fff;border:none;padding:10px 20px;border-radius:6px;font-size:0.9rem;font-weight:700;cursor:pointer;text-transform:uppercase;letter-spacing:0.5px;transition:background 0.2s ease;display:none}#quiz-modal .quiz-actions .next-btn:hover{background:#333}#quiz-modal .hint-box,#quiz-modal .reasoning-box{margin-top:20px;padding:15px;border-radius:8px;font-size:0.9rem;line-height:1.5;display:none;animation:fadeIn 0.3s ease}#quiz-modal .hint-box{background:#fef9c3;border-left:4px solid #facc15;color:#854d0e}#quiz-modal .reasoning-box{background:#f0fdf4;border-left:4px solid #22c55e;color:#166534}#quiz-modal .reasoning-box.incorrect-reasoning{background:#fef2f2;border-left:4px solid #ef4444;color:#991b1b}#quiz-modal .quiz-finished{text-align:center;padding:40px 20px}#quiz-modal .quiz-finished h2{font-size:2rem;font-weight:900;margin-bottom:20px}#quiz-modal .quiz-finished .final-score{font-size:4rem;font-weight:900;line-height:1;margin-bottom:10px}#quiz-modal .quiz-finished .score-label{text-transform:uppercase;font-weight:700;color:var(--text-muted);letter-spacing:1px;margin-bottom:30px}#quiz-modal .quiz-finished .restart-btn{background:#000;color:#fff;border:none;padding:15px 30px;border-radius:8px;font-size:1rem;font-weight:800;cursor:pointer;text-transform:uppercase;letter-spacing:1px;width:100%}#quiz-modal .quiz-finished .restart-btn:hover{background:#333}@media (max-width: 600px){#quiz-modal{max-width:100%}#quiz-fab{bottom:20px;right:20px}}