:root{--bg:#0b132b;--text:#0f172a;--muted:#475569;--card:#ffffff;--border:#e2e8f0;--primary:#0B5ED7;--primary-600:#0a53be;--ring:#cfe0ff}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,system-ui,Segoe UI,Roboto,Ubuntu,Cantarell,Helvetica Neue,Arial,Noto Sans,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f8fafc;color:var(--text)}.container{max-width:960px;margin:0 auto;padding:24px}.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.brand{font-weight:800;font-size:22px;color:var(--primary)}.glass{position:sticky;top:0;padding:8px 0;background:#f8fafc99;-webkit-backdrop-filter:saturate(180%) blur(10px);backdrop-filter:saturate(180%) blur(10px);z-index:10}.banner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-radius:12px;border:1px solid var(--border);margin-top:12px}.banner .text{flex:1}.banner.error{background:#fef2f2;border-color:#fecaca;color:#b91c1c}.banner.info{background:#eff6ff;border-color:#bfdbfe;color:#1d4ed8}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;box-shadow:0 6px 18px #0f172a0f}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.layout-2{display:grid;grid-template-columns:260px 1fr;gap:16px}.sidebar{position:sticky;top:16px}.sidebar .item{display:flex;flex-direction:column;gap:6px;justify-content:center;align-items:stretch;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--card);margin-bottom:8px}.sidebar .item.active{border-color:var(--primary);box-shadow:0 0 0 3px var(--ring)}.sidebar .item.warn{border-color:#ea580c;box-shadow:0 0 0 3px #ea580c33}.mini-progress{height:6px;background:#e5e7eb;border-radius:6px;overflow:hidden}.mini-progress>div{height:100%;background:var(--primary);transition:width .35s cubic-bezier(.2,.8,.2,1)}.mobile-nav{position:fixed;left:0;right:0;bottom:0;display:none;gap:10px;align-items:center;justify-content:space-between;padding:12px 16px calc(12px + env(safe-area-inset-bottom));background:#f8fafcd9;-webkit-backdrop-filter:saturate(180%) blur(10px);backdrop-filter:saturate(180%) blur(10px);border-top:1px solid var(--border)}.mobile-nav .btn{flex:1}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 16px;border-radius:8px;border-width:1px;border-style:solid;border-color:#cbd5e1;background:#fff;color:#0f172a;cursor:pointer;transition:all .15s}.btn:hover{background:#f1f5f9}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-600)}.btn>svg{margin-right:8px}.btn-group{display:flex;gap:10px;flex-wrap:wrap}.btn-active{background:var(--primary);color:#fff;border-color:var(--primary)}.input{padding:10px;border-radius:8px;border:1px solid #cbd5e1;background:#fff;outline:none}.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--ring)}.title{font-size:18px;font-weight:700;margin-bottom:8px}.subtitle{color:var(--muted);margin-bottom:16px}.question{margin-bottom:12px;font-weight:600}.question-help{color:var(--muted);margin:6px 0 12px;line-height:1.4}.actions{display:flex;justify-content:space-between;margin-top:16px}.legend{font-size:12px;color:var(--muted);margin-top:10px}.score{font-size:80px;font-weight:800;color:var(--primary);line-height:1}[data-theme=dark]{--text:#e2e8f0;--muted:#94a3b8;--card:#0f172a;--border:#1f2937;--ring:#1e3a8a}[data-theme=dark] body{background:#0b132b}[data-theme=dark] .btn{background:#0f172a;border-color:#334155;color:#e2e8f0}[data-theme=dark] .btn:hover{background:#0b1b34}[data-theme=dark] .input{background:#0f172a;color:#e2e8f0;border-color:#334155}[data-theme=dark] .card{box-shadow:none}[data-theme=dark] .mobile-nav{background:#0b132bd9}[data-theme=dark] .banner.error{background:#be123c26;border-color:#7f1d1d;color:#fecaca}[data-theme=dark] .banner.info{background:#1d4ed826;border-color:#1e3a8a;color:#bfdbfe}@media (max-width: 900px){.container{padding:16px}.grid-2,.layout-2{grid-template-columns:1fr}.sidebar{position:static}}@media (max-width: 640px){.btn{padding:12px 18px;border-radius:12px}.title{font-size:16px}.score{font-size:64px}.mobile-nav{display:flex}}