@import "https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Work+Sans:wght@400;500;600&display=swap";:root{--bg:#f6f1ea;--panel:#fff;--surface:#f9f7f3;--ink:#1f1c1a;--muted:#5c5753;--accent:#0f766e;--accent-strong:#0b4f4a;--accent-soft:#0f766e1f;--border:#1f1c1a1f;--border-soft:#1f1c1a2e;--danger:#e11d48;--shadow-soft:0 12px 30px -26px #1f1c1a80;--shadow-strong:0 18px 30px -22px #0f766e99;--sans:"Work Sans", "Segoe UI", sans-serif;--heading:"Space Grotesk", "Segoe UI", sans-serif;font:16px/1.6 var(--sans);color:var(--muted);background:var(--bg);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{background:radial-gradient(circle at top, #0f766e1f, transparent 45%), radial-gradient(circle at 90% 10%, #f973162e, transparent 40%), var(--bg);min-height:100svh;margin:0}*{box-sizing:border-box}#root{width:min(1200px,100%);margin:0 auto}h1,h2,h3{font-family:var(--heading);color:var(--ink);margin:0}h1{letter-spacing:-.02em;font-size:clamp(2.2rem,4vw,3.6rem)}h2{font-size:1.5rem}h3{font-size:1.1rem}p{margin:0}button,input{font-family:inherit}.app{flex-direction:column;gap:28px;padding:36px 28px 60px;animation:.6s fade-in;display:flex}.hero{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.hero-title{flex:360px}.hero-title h1{margin:0}.tag{text-transform:uppercase;letter-spacing:.35em;color:var(--accent);font-size:12px;font-weight:600}.subtitle{max-width:540px}.title-sub{letter-spacing:.08em;text-transform:uppercase;color:var(--accent-strong);margin-left:10px;font-size:.7em;display:inline-block}.hero-meta{flex:0 auto}.author{color:var(--ink);text-transform:uppercase;letter-spacing:.2em;margin:0;font-size:12px;font-weight:600}.panel{background:var(--panel);border:1px solid var(--border);box-shadow:var(--shadow-soft);border-radius:20px;padding:28px}.setup{gap:20px;display:grid}.field{gap:10px;display:grid}label{color:var(--ink);font-weight:600}.input-row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}input[type=number]{border:1px solid var(--border);background:var(--surface);min-width:140px;color:var(--ink);border-radius:12px;padding:10px 14px;font-size:16px}.hint{color:var(--muted);font-size:14px}.dropdown-trigger{border:1px solid var(--border);background:var(--surface);color:var(--ink);cursor:pointer;border-radius:12px;justify-content:space-between;align-items:center;padding:12px 16px;display:flex}.dropdown{border:1px solid var(--border);background:var(--surface);border-radius:16px;gap:12px;max-height:320px;margin-top:12px;padding:16px;display:grid;overflow:auto}.dropdown-group{border-top:1px dashed var(--border-soft);padding-top:12px}.dropdown-group:first-of-type{border-top:none;padding-top:0}.group-title{color:var(--ink);flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 10px;font-weight:600;display:flex}.chapter-count{color:var(--accent);font-size:12px;font-weight:500}.checkbox-row{align-items:center;gap:10px;font-size:15px;display:flex}.checkbox-row span{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.topic-count{color:var(--muted);background:var(--bg);white-space:nowrap;border-radius:12px;padding:2px 8px;font-size:12px;font-weight:500}input[type=checkbox]{accent-color:var(--accent);width:18px;height:18px}.chevron{color:var(--muted);font-size:13px}.primary,.ghost{cursor:pointer;border:none;border-radius:999px;padding:12px 24px;font-weight:600;transition:transform .2s,box-shadow .2s}.primary{background:linear-gradient(135deg, var(--accent), var(--accent-strong));color:#fff;box-shadow:var(--shadow-strong)}.ghost{border:1px solid var(--border);color:var(--ink);background:0 0}.primary:disabled,.ghost:disabled{opacity:.6;cursor:not-allowed;box-shadow:none}.primary:hover:not(:disabled),.ghost:hover:not(:disabled){transform:translateY(-1px)}.quiz{gap:18px;display:grid}.quiz-header{grid-template-columns:repeat(3,minmax(0,1fr)) auto;align-items:center;gap:16px;display:grid}.meta-label{text-transform:uppercase;letter-spacing:.2em;color:var(--muted);margin:0 0 6px;font-size:12px}.meta-value,.timer{margin:0;font-size:22px;font-weight:600}.meta-sub{color:var(--muted);margin:4px 0 0;font-size:13px}.timer.urgent{color:var(--danger)}.notice{text-align:center;border-radius:14px;padding:14px 18px;font-weight:600}.notice.success{color:#065f46;background:#10b98129}.notice.danger{color:#881337;background:#f43f5e29}.question-single{gap:16px;display:grid}.question-card{border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-soft);border-radius:20px;padding:20px;animation:.5s slide-up}.question-card h3{margin:10px 0 16px}.question-nav{justify-content:space-between;gap:12px;display:flex}.question-meta{text-transform:uppercase;letter-spacing:.14em;color:var(--muted);justify-content:space-between;font-size:13px;display:flex}.options{gap:10px;display:grid}.option{background:var(--panel);cursor:pointer;text-align:left;-webkit-user-select:text;user-select:text;border:1px solid #0000;border-radius:14px;align-items:center;gap:12px;padding:12px 14px;font-weight:400;transition:border .2s,transform .2s;display:flex}.option:hover:not(:disabled){border-color:var(--accent);transform:translate(2px)}.option.correct{background:#10b9811f;border-color:#10b98199}.option.wrong{background:#f43f5e1f;border-color:#f43f5e99}.option.picked{box-shadow:0 0 0 2px #0f766e33}.option:disabled{cursor:default;opacity:1}.opt-key{background:var(--accent-soft);text-transform:uppercase;width:34px;height:34px;color:var(--accent-strong);border-radius:50%;place-items:center;font-weight:700;display:grid}.opt-text{flex:1;font-weight:400}.explain{border:1px dashed var(--border-soft);background:#0f766e0f;border-radius:12px;margin-top:12px;padding:10px 12px}.explain summary{cursor:pointer;color:var(--accent-strong);font-weight:600}.quiz-actions{flex-wrap:wrap;justify-content:flex-end;gap:12px;display:flex}.review h2{margin-top:0}.review-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px;margin-top:16px;display:grid}.review-summary{background:var(--surface);border:1px solid var(--border);border-radius:16px;flex-wrap:wrap;gap:16px;margin-bottom:16px;padding:20px;display:flex}.summary-item{text-align:center;background:var(--bg);border-radius:12px;flex:120px;padding:12px}.summary-item.correct{background:#d1fae5}.summary-item.wrong{background:#fce7f3}.summary-item.score{background:#dbeafe}.summary-label{color:var(--muted);margin-bottom:4px;font-size:.85em;display:block}.summary-value{font-size:1.5em;font-weight:700;display:block}.summary-item.correct .summary-value{color:#065f46}.summary-item.wrong .summary-value{color:#881337}.summary-item.score .summary-value{color:#1e40af}.review-filters{flex-wrap:wrap;gap:8px;margin-bottom:16px;display:flex}.filter-btn{border:1px solid var(--border);background:var(--surface);cursor:pointer;border-radius:20px;padding:8px 16px;font-size:.9em;transition:all .2s}.filter-btn:hover{background:var(--bg)}.filter-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.filter-btn.filter-correct.active{background:#10b981;border-color:#10b981}.filter-btn.filter-wrong.active{background:#f43f5e;border-color:#f43f5e}.review-item{border:1px solid var(--border);background:var(--surface);border-radius:16px;padding:14px}.review-item.review-correct{border-left:4px solid #10b981}.review-item.review-wrong{border-left:4px solid #f43f5e}.review-index{margin:0 0 8px;font-weight:600}.review-question{color:var(--muted);margin:0 0 8px}.review-answer{margin:0 0 6px;font-weight:600}.review-answer.correct{color:#065f46}.review-answer.wrong{color:#881337}.correct-answer{color:#065f46;font-weight:600}.history-home{margin-top:8px}.history-home-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.history-home-header h3{color:var(--muted);margin:0;font-size:1.1em}.clear-history-btn{color:var(--muted);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:4px 8px;font-size:.85em;transition:all .2s}.clear-history-btn:hover{color:#881337;background:#fce7f3}.history-cards{flex-wrap:wrap;gap:12px;display:flex}.history-card{border:1px solid var(--border);cursor:pointer;background:linear-gradient(135deg,#f8fafc 0%,#f1f5f9 100%);border-radius:12px;align-items:center;gap:12px;min-width:180px;padding:12px 16px;transition:all .2s;display:flex;position:relative}.history-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.history-card.pass{border-left:4px solid #10b981}.history-card.fail{border-left:4px solid #f43f5e}.card-score{text-align:center;min-width:50px;font-size:1.8em;font-weight:700}.history-card.pass .card-score{color:#059669}.history-card.fail .card-score{color:#e11d48}.card-info{flex:1}.card-date{color:var(--muted);margin:0 0 4px;font-size:.8em}.card-stats{gap:6px;margin:0;font-size:.85em;display:flex}.card-stats .correct{color:#059669;font-weight:600}.card-stats .wrong{color:#e11d48;font-weight:600}.card-stats .total{color:var(--muted)}.card-delete{color:var(--muted);cursor:pointer;opacity:0;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;font-size:1.2em;transition:all .2s;display:flex;position:absolute;top:4px;right:4px}.history-card:hover .card-delete{opacity:1}.card-delete:hover{color:#e11d48;background:#fce7f3}.history-section{max-width:800px;margin:0 auto}.history-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px;display:flex}.history-header h2{margin:0}.history-actions{gap:8px;display:flex}.history-list{flex-direction:column;gap:12px;display:flex}.history-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:16px;transition:all .2s;display:flex}.history-item:hover{border-color:var(--accent)}.history-info{flex-direction:column;gap:4px;display:flex}.history-date{color:var(--text);margin:0;font-weight:600}.history-stats{gap:12px;margin:0;font-size:.9em;display:flex}.stat-correct{color:#065f46;font-weight:600}.stat-wrong{color:#881337;font-weight:600}.stat-total{color:var(--muted)}.history-score{margin:0;font-size:1.1em;font-weight:700}.history-score.pass{color:#065f46}.history-score.fail{color:#881337}.history-buttons{gap:8px;display:flex}.empty-history{text-align:center;color:var(--muted);padding:40px 20px}.secondary{background:var(--surface);color:var(--text);border:1px solid var(--border);cursor:pointer;border-radius:12px;width:100%;margin-top:12px;padding:12px 20px;font-size:1em;transition:all .2s}.secondary:hover{background:var(--bg);border-color:var(--accent)}.danger-btn{color:#881337;cursor:pointer;background:#fce7f3;border:1px solid #f9a8d4;border-radius:8px;padding:8px 16px;font-size:.9em;transition:all .2s}.danger-btn:hover{background:#fdf2f8;border-color:#f472b6}.ghost.danger{color:#881337}.ghost.danger:hover{background:#fce7f3}.history-detail .history-header{margin-bottom:20px}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes slide-up{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@media (width<=900px){.hero,.quiz-header{grid-template-columns:1fr}.quiz-actions{justify-content:flex-start}}@media (width<=600px){.app{padding:28px 18px 48px}.panel{padding:20px}}