:root{--primary-color: #2563eb;--primary-hover: #1d4ed8;--secondary-color: #64748b;--success-color: #10b981;--warning-color: #f59e0b;--danger-color: #ef4444;--background-color: #f1f5f9;--card-background: #ffffff;--text-color: #0f172a;--text-muted: #64748b;--border-color: #e2e8f0;--timer-green: #10b981;--timer-yellow: #f59e0b;--timer-red: #ef4444}[data-theme=dark]{--primary-color: #3b82f6;--primary-hover: #60a5fa;--secondary-color: #94a3b8;--success-color: #34d399;--warning-color: #fbbf24;--danger-color: #f87171;--background-color: #0f172a;--card-background: #1e293b;--text-color: #f8fafc;--text-muted: #94a3b8;--border-color: #334155}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--background-color);color:var(--text-color);margin:0;padding:0;line-height:1.6;transition:background-color .3s,color .3s}#app{max-width:1200px;margin:0 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auto;gap:20px;height:100%;overflow:hidden}.quiz-sticky-header{grid-column:1;grid-row:1;position:static;height:100%;border-right:1px solid var(--border-color);border-bottom:none;padding-right:20px;background:none;-webkit-backdrop-filter:none;backdrop-filter:none}#question-container{grid-column:2;grid-row:1;overflow-y:auto;padding-right:20px}.quiz-controls{grid-column:1 / -1;grid-row:2;position:static;border-top:1px solid var(--border-color);padding:15px 0;margin:0}}.view{display:none;flex:1}.view.active{display:block;animation:fadeIn .3s ease-in-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.hidden{display:none!important}h1,h2,h3{margin-top:0}.btn-block{display:block;width:100%}.btn{display:inline-flex;align-items:center;justify-content:center;font-weight:600;text-align:center;vertical-align:middle;-webkit-user-select:none;user-select:none;border:1px solid transparent;padding:.5rem 1rem;font-size:.9rem;line-height:1.5;border-radius:50px;transition:all .2s ease;cursor:pointer;box-shadow:0 1px 2px #0000001a}.btn:active{transform:translateY(1px);box-shadow:none}.btn-primary{color:#fff;background-color:var(--primary-color);border-color:var(--primary-color)}.btn-primary:hover{background-color:var(--primary-hover);border-color:var(--primary-hover);box-shadow:0 2px 4px #00000026}.btn-secondary{color:#fff;background-color:var(--secondary-color);border-color:var(--secondary-color)}.btn-outline{color:var(--primary-color);background-color:transparent;border-color:var(--primary-color)}.btn-outline:hover{background-color:#0056b30d}.btn-large{padding:.8rem;font-size:1rem;margin-bottom:0;width:100%;display:flex;flex-direction:column;align-items:center;border-radius:8px;height:100%}@media(min-width:768px){.btn-large{height:auto;min-height:200px;justify-content:center}}.btn-title{font-weight:700;margin-bottom:2px}.btn-subtitle{font-size:.75rem;opacity:.8}.btn-small{padding:.2rem .6rem;font-size:.75rem}.btn-text{background:none;border:none;color:var(--text-muted);text-decoration:underline;font-size:.85rem}.progress-card,.domain-performance,.explanation-card{background-color:var(--card-background);border:1px solid var(--border-color);border-radius:8px;padding:1rem;margin-bottom:0;box-shadow:0 2px 4px #0000000d}.progress-bar-container{height:.5rem;background-color:var(--border-color);border-radius:1rem;overflow:hidden;margin-bottom:.5rem}.progress-bar{height:100%;background-color:var(--success-color);transition:width .6s ease}.timer-container{text-align:center;margin-bottom:1rem}.timer-display{font-size:1.2rem;font-weight:700;font-variant-numeric:tabular-nums;color:var(--text-color)}.timer-bar-container{height:4px;background-color:var(--border-color);border-radius:2px;overflow:hidden;margin-top:.25rem}.timer-bar{height:100%;background-color:var(--timer-green);width:100%;transition:width 1s linear,background-color .3s}.time-bank-container{display:flex;justify-content:space-between;align-items:center;background-color:var(--card-background);padding:.4rem .8rem;border-radius:6px;border:1px solid var(--border-color);margin-bottom:.5rem;font-size:.85rem}.question-container{margin-bottom:60px}.question-text{font-size:1.1rem;font-weight:600;margin-bottom:1rem;line-height:1.4}.options-list{list-style:none;padding:0;display:grid;gap:8px}.option-item{background-color:var(--card-background);border:1px solid var(--border-color);border-radius:6px;margin-bottom:0;padding:.7rem .9rem;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;position:relative;font-size:.95rem}.option-item:hover{border-color:var(--primary-color);background-color:#00000005;transform:translateY(-1px)}.option-item.selected{border-color:var(--primary-color);background-color:#0056b30d;box-shadow:0 1px 3px #0056b326}.option-item input{position:absolute;opacity:0;cursor:pointer;height:0;width:0}.option-item label{display:flex;align-items:center;width:100%;cursor:pointer}.option-item label:before{content:"";display:inline-block;width:16px;height:16px;margin-right:10px;border:2px solid var(--text-muted);border-radius:50%;flex-shrink:0;transition:all .2s}.option-item input[type=checkbox]+label:before{border-radius:3px}.option-item.selected label:before{background-color:var(--primary-color);border-color:var(--primary-color);box-shadow:inset 0 0 0 2px var(--card-background)}.quiz-controls{position:sticky;bottom:0;left:0;right:0;background-color:var(--background-color);border-top:1px solid var(--border-color);margin:0 -15px -15px;padding:10px 15px;z-index:100;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background-color:#ffffffe6;display:flex;justify-content:space-between;align-items:center}.quiz-controls .btn-block{width:auto;flex:1;margin-right:10px}.secondary-controls{display:flex;gap:10px}[data-theme=dark] .quiz-controls{background-color:#222222e6}.feedback-header{padding:.8rem;border-radius:.25rem;margin-bottom:.8rem;font-weight:700;text-align:center;font-size:.95rem}.feedback-header.correct{background-color:#28a74533;color:var(--success-color)}.feedback-header.incorrect{background-color:#dc354533;color:var(--danger-color)}.option-item.correct-answer{border-color:var(--success-color);background-color:#28a7451a}.option-item.incorrect-selection{border-color:var(--danger-color);background-color:#dc35451a}.reference-box{margin-top:1rem;font-size:.9rem;color:var(--text-muted);border-top:1px solid var(--border-color);padding-top:.5rem}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000;opacity:1;transition:opacity .3s}.modal.hidden{display:none;opacity:0;pointer-events:none}.modal-content{background-color:var(--card-background);border-radius:.5rem;width:90%;max-width:500px;box-shadow:0 4px 6px #0000001a;display:flex;flex-direction:column;max-height:90vh}.modal-header{padding:1rem;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.modal-header h2{margin:0;font-size:1.25rem}.close-btn{background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text-muted)}.modal-body{padding:1rem;overflow-y:auto}.modal-footer{padding:1rem;border-top:1px solid var(--border-color);text-align:right}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-control{width:100%;padding:.5rem;border:1px solid var(--border-color);border-radius:.25rem;background-color:var(--background-color);color:var(--text-color);font-size:1rem}.btn-block{display:block;width:100%;margin-bottom:.5rem}.domain-list{display:flex;flex-direction:column;gap:10px}.quiz-sticky-header{position:sticky;top:0;background-color:var(--background-color);z-index:90;padding-bottom:5px;margin-bottom:15px;border-bottom:1px solid var(--border-color);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background-color:#fffffff2}[data-theme=dark] .quiz-sticky-header{background-color:#0f172af2}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:5px;padding-top:5px}.question-info{font-weight:600;font-size:.85rem;color:var(--text-muted);display:flex;align-items:center;gap:8px}.domain-tag{background-color:var(--primary-color);color:#fff;padding:1px 6px;border-radius:10px;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.quiz-sticky-header .timer-container{margin-bottom:.25rem}.quiz-sticky-header .time-bank-container{margin-bottom:0;padding:.25rem .75rem;font-size:.8rem}.toast-container{position:fixed;top:20px;left:50%;transform:translate(-50%);z-index:2000;display:flex;flex-direction:column;gap:10px;pointer-events:none}.toast{background-color:#333;color:#fff;padding:12px 24px;border-radius:50px;box-shadow:0 4px 12px #00000026;font-size:.9rem;font-weight:500;opacity:0;transform:translateY(-20px);transition:all .3s ease;pointer-events:auto;display:flex;align-items:center;gap:10px}.toast.show{opacity:1;transform:translateY(0)}.toast.error{background-color:var(--danger-color)}.toast.success{background-color:var(--success-color)}.toast.info{background-color:var(--primary-color)}[data-theme=dark] .toast{background-color:#fff;color:#333}