*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f8fafc;color:#1e293b;min-height:100vh}#root{min-height:100vh}:root{--primary: #2563eb;--primary-hover: #1d4ed8;--correct: #16a34a;--correct-bg: #dcfce7;--wrong: #dc2626;--wrong-bg: #fee2e2;--selected: #2563eb;--selected-bg: #dbeafe;--bg: #f8fafc;--card-bg: #ffffff;--text: #1e293b;--text-light: #64748b;--border: #e2e8f0;--radius: 12px}.app{min-height:100vh;display:flex;justify-content:center;padding:20px}.menu-container{max-width:600px;width:100%;padding-top:40px}.menu-container h1{font-size:2rem;font-weight:700;text-align:center;margin-bottom:4px}.subtitle{text-align:center;color:var(--text-light);margin-bottom:32px;font-size:1.1rem}.category-grid{display:flex;flex-direction:column;gap:12px}.category-card{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:20px;background:var(--card-bg);border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;text-align:left;transition:all .15s;color:var(--text);width:100%}.category-card:hover{border-color:var(--primary);box-shadow:0 2px 12px #2563eb1a;transform:translateY(-1px)}.category-card.all{background:linear-gradient(135deg,#eff6ff,#dbeafe);border-color:var(--primary)}.category-card.all:hover{box-shadow:0 4px 16px #2563eb26}.card-icon{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:var(--primary);color:#fff;font-weight:700;font-size:1rem}.card-title{font-weight:600;font-size:1rem;line-height:1.3}.card-count{font-size:.8rem;color:var(--text-light)}.back-btn{display:inline-flex;align-items:center;gap:4px;padding:8px 16px;border:1px solid var(--border);border-radius:8px;background:var(--card-bg);cursor:pointer;font-size:.9rem;color:var(--text-light);transition:all .15s;margin-bottom:24px}.back-btn:hover{border-color:var(--primary);color:var(--primary)}.menu-section{background:var(--card-bg);border-radius:var(--radius);padding:24px;margin-bottom:20px;border:1px solid var(--border)}.menu-section h2{font-size:1.1rem;font-weight:600;margin-bottom:16px}.count-options{display:flex;gap:8px;flex-wrap:wrap}.count-btn{padding:8px 20px;border:2px solid var(--border);border-radius:8px;background:var(--card-bg);cursor:pointer;font-size:.95rem;font-weight:500;transition:all .15s;color:var(--text)}.count-btn:hover{border-color:var(--primary);color:var(--primary)}.count-btn.active{border-color:var(--primary);background:var(--selected-bg);color:var(--primary)}.available-info{margin-top:12px;font-size:.85rem;color:var(--text-light)}.start-btn{width:100%;padding:16px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-size:1.1rem;font-weight:600;cursor:pointer;transition:background .15s}.start-btn:hover:not(:disabled){background:var(--primary-hover)}.start-btn:disabled{opacity:.5;cursor:not-allowed}.quiz-container{max-width:700px;width:100%;padding-top:20px}.quiz-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;gap:12px}.quiz-progress{font-weight:700;font-size:1rem;color:var(--primary);white-space:nowrap}.quiz-category{font-size:.8rem;color:var(--text-light);text-align:center;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.quit-btn{padding:6px 16px;border:1px solid var(--border);border-radius:6px;background:var(--card-bg);cursor:pointer;font-size:.85rem;color:var(--text-light);transition:all .15s;white-space:nowrap}.quit-btn:hover{border-color:var(--wrong);color:var(--wrong)}.progress-bar{height:4px;background:var(--border);border-radius:2px;margin-bottom:24px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);border-radius:2px;transition:width .3s ease}.question-card{background:var(--card-bg);border-radius:var(--radius);padding:28px;border:1px solid var(--border)}.question-text{font-size:1.15rem;font-weight:600;line-height:1.5;margin-bottom:24px}.no-answer-badge{display:inline-block;background:#fef3c7;color:#92400e;padding:4px 12px;border-radius:6px;font-size:.8rem;font-weight:500;margin-bottom:16px}.options-list{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}.option{display:flex;align-items:flex-start;gap:14px;padding:14px 16px;border:2px solid var(--border);border-radius:10px;background:var(--card-bg);cursor:pointer;text-align:left;font-size:.95rem;transition:all .15s;line-height:1.4;color:var(--text)}.option:hover:not(:disabled){border-color:var(--primary);background:#f8faff}.option.selected{border-color:var(--selected);background:var(--selected-bg)}.option.correct{border-color:var(--correct);background:var(--correct-bg)}.option.wrong{border-color:var(--wrong);background:var(--wrong-bg)}.option:disabled{cursor:default}.option-letter{display:flex;align-items:center;justify-content:center;min-width:32px;height:32px;border-radius:8px;background:var(--bg);font-weight:700;font-size:.85rem;color:var(--text-light);flex-shrink:0}.option.selected .option-letter{background:var(--primary);color:#fff}.option.correct .option-letter{background:var(--correct);color:#fff}.option.wrong .option-letter{background:var(--wrong);color:#fff}.option-text{padding-top:4px}.confirm-btn,.next-btn{padding:12px 32px;border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .15s;color:#fff}.confirm-btn{background:var(--primary)}.confirm-btn:hover:not(:disabled){background:var(--primary-hover)}.confirm-btn:disabled{opacity:.4;cursor:not-allowed}.next-btn{background:var(--correct)}.next-btn:hover{background:#15803d}.results-container{max-width:500px;width:100%;padding-top:40px;text-align:center}.results-container h1{font-size:2rem;margin-bottom:24px}.score-circle{position:relative;width:160px;height:160px;margin:0 auto 32px}.score-circle svg{width:100%;height:100%}.score-text{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:2.2rem;font-weight:700}.stats-grid{display:flex;justify-content:center;gap:16px;margin-bottom:24px;flex-wrap:wrap}.stat{display:flex;flex-direction:column;align-items:center;padding:16px 24px;border-radius:var(--radius);min-width:100px}.stat.correct{background:var(--correct-bg);color:var(--correct)}.stat.wrong{background:var(--wrong-bg);color:var(--wrong)}.stat.unanswered{background:#fef3c7;color:#92400e}.stat.no-key{background:var(--bg);color:var(--text-light)}.stat-num{font-size:1.8rem;font-weight:700}.stat-label{font-size:.8rem;font-weight:500;margin-top:4px}.results-note{color:var(--text-light);font-size:.85rem;margin-bottom:24px}.results-actions{display:flex;flex-direction:column;gap:12px}.review-btn{width:100%;padding:16px;background:var(--card-bg);color:var(--primary);border:2px solid var(--primary);border-radius:var(--radius);font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .15s}.review-btn:hover{background:var(--selected-bg)}.skip-btn{padding:12px 32px;border:2px solid var(--border);border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .15s;color:var(--text-light);background:var(--card-bg)}.skip-btn:hover{border-color:var(--text-light);color:var(--text)}.action-buttons{display:flex;justify-content:flex-end;gap:12px}.review-option{cursor:default!important}.review-badge{margin-left:auto;padding:2px 10px;border-radius:6px;font-size:.75rem;font-weight:600;white-space:nowrap;flex-shrink:0}.review-badge.correct-answer{background:var(--correct);color:#fff}.review-badge.your-answer{background:var(--wrong);color:#fff}.review-skipped{text-align:center;color:#92400e;background:#fef3c7;padding:8px 16px;border-radius:8px;font-size:.85rem;font-weight:500;margin-bottom:16px}.review-nav{display:flex;justify-content:space-between;gap:12px}.review-nav-btn{flex:1;padding:12px 24px;border:2px solid var(--border);border-radius:10px;background:var(--card-bg);cursor:pointer;font-size:.95rem;font-weight:600;color:var(--text);transition:all .15s}.review-nav-btn:hover:not(:disabled){border-color:var(--primary);color:var(--primary)}.review-nav-btn:disabled{opacity:.35;cursor:not-allowed}@media(max-width:600px){.app{padding:12px}.menu-container h1{font-size:1.5rem}.question-card{padding:20px 16px}.question-text{font-size:1.05rem}.stats-grid{gap:8px}.stat{padding:12px 16px;min-width:80px}}