body,header{display:flex}.logo,.topic-badge{color:var(--primary)}body,h2{color:var(--text-main)}.btn,.option-label{cursor:pointer;transition:.2s}:root{--primary:#4F46E5;--primary-hover:#4338ca;--secondary:#111827;--background:#F3F4F6;--card-bg:#FFFFFF;--text-main:#1F2937;--text-muted:#6B7280;--border:#E5E7EB;--success-bg:#ECFDF5;--success-text:#065F46;--success-border:#34D399;--error-bg:#FEF2F2;--error-text:#991B1B;--error-border:#F87171;--radius:12px;--shadow:0 4px 6px -1px rgba(0, 0, 0, 0.1),0 2px 4px -1px rgba(0, 0, 0, 0.06)}*{box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background-color:var(--background);margin:0;padding:0;line-height:1.5;min-height:100vh;justify-content:center}.card,header{margin-bottom:1.5rem}.app-container{width:100%;max-width:600px;padding:20px;display:flex;flex-direction:column}header{justify-content:space-between;align-items:center;padding:0 .5rem}.logo{font-weight:800;font-size:1.25rem}.badge,.btn,.topic-badge{font-weight:600}.topic-badge{background:#e0e7ff;padding:4px 12px;border-radius:20px;font-size:.875rem}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem;border:1px solid rgba(0,0,0,.05)}h2{margin-top:0;font-size:1.5rem}.subtitle{color:var(--text-muted);margin-top:-.5rem;font-size:.95rem}.hidden{display:none!important}.fade-in{animation:.3s ease-in-out fadeIn}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}textarea{width:100%;height:120px;padding:1rem;border:2px solid var(--border);border-radius:var(--radius);font-family:Monaco,monospace;font-size:.9rem;resize:vertical;transition:border-color .2s}input:focus,textarea:focus{outline:0;border-color:var(--primary)}input[type=number],input[type=text]{padding:.75rem 1rem;border:2px solid var(--border);border-radius:var(--radius);font-size:1rem;width:100%;transition:border-color .2s}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.875rem 1.5rem;border-radius:var(--radius);font-size:1rem;border:none;margin-bottom:.75rem}.full-width{width:100%}.btn.primary{background:var(--primary);color:#fff;box-shadow:0 2px 4px rgba(79,70,229,.3)}.btn.primary:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-1px)}.btn.secondary{background:var(--secondary);color:#fff}.btn.secondary:hover:not(:disabled){background:#000}.btn.warning{background:#f59e0b;color:#fff}.btn.ghost,.btn.outline{background:0 0}.btn.outline{border:2px solid var(--border);color:var(--text-main)}.badge,.btn.ghost{color:var(--text-muted)}.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.quiz-header{margin-bottom:1.5rem}.progress-track{background:#e5e7eb;height:8px;border-radius:10px;overflow:hidden;margin-bottom:.5rem}#progress-fill{background:var(--primary);height:100%;width:0%;transition:width .3s}.badge{font-size:.85rem}.question-text{font-size:1.25rem;font-weight:700;margin-bottom:1.5rem;line-height:1.4}.options-container{display:flex;flex-direction:column;gap:.75rem}.option-label{display:flex;align-items:center;padding:1rem;border:2px solid var(--border);border-radius:var(--radius);background:#fff}.option-label input{accent-color:var(--primary);width:1.2rem;height:1.2rem;margin-right:1rem;flex-shrink:0}.option-label:hover{border-color:#a5b4fc;background:#f9fafb}.option-label:has(input:checked){border-color:var(--primary);background:#eef2ff;color:var(--primary)}.option-label.correct{background:var(--success-bg)!important;border-color:var(--success-border)!important;color:var(--success-text)!important}.option-label.wrong{background:var(--error-bg)!important;border-color:var(--error-border)!important;color:var(--error-text)!important}.cloze-input{display:inline-block;width:auto;min-width:80px;max-width:150px;margin:0 4px;padding:4px 8px!important;text-align:center;border:none!important;border-bottom:2px solid var(--primary)!important;border-radius:0!important;background:#f3f4f6}.cloze-input:focus{background:#e0e7ff}.feedback-card{padding:1rem;border-radius:var(--radius);margin-bottom:1.5rem;font-size:.95rem;line-height:1.6;animation:.3s fadeIn}.feedback-correct{background:var(--success-bg);border:1px solid var(--success-border);color:var(--success-text)}.feedback-wrong{background:var(--error-bg);border:1px solid var(--error-border);color:var(--error-text)}.explanation{display:block;margin-top:.5rem;font-size:.9rem;opacity:.9}.result-card{text-align:center;padding:3rem 1.5rem}.score-circle{width:120px;height:120px;border-radius:50%;background:var(--primary);color:#fff;display:flex;flex-direction:column;justify-content:center;align-items:center;margin:0 auto 1.5rem;box-shadow:0 10px 15px -3px rgba(79,70,229,.4);transition:transform .3s cubic-bezier(.175, .885, .32, 1.275)}.score-circle.pulse{animation:2s infinite scorePulse;background:linear-gradient(135deg,#6366f1,#8b5cf6)}@keyframes scorePulse{0%{transform:scale(1);box-shadow:0 0 0 0 rgba(99,102,241,.7)}70%{transform:scale(1.05);box-shadow:0 0 0 15px rgba(99,102,241,0)}100%{transform:scale(1);box-shadow:0 0 0 0 rgba(99,102,241,0)}}.result-message{font-size:1.1rem;font-weight:600;margin-bottom:1.5rem;color:var(--text-main)}#score-percent{font-size:2rem;font-weight:800;line-height:1}.score-detail{font-size:.9rem;opacity:.9;margin-top:4px}.time-badge{display:inline-block;background:#f3f4f6;padding:.5rem 1rem;border-radius:20px;color:var(--text-muted);font-weight:500;margin-bottom:2rem}@media (max-width:480px){.app-container{padding:15px}.card{padding:1.25rem}.question-text{font-size:1.1rem}.option-label{padding:.875rem}h2{font-size:1.3rem}.action-bar button{margin-bottom:.5rem}}