:root{--bg:#fff;--panel:#fff;--text:#0f172a;--muted:#64748b;--border:#e2e8f0;--border2:#cbd5e1;--shadow:0 1px 2px #0000000f,0 8px 24px #0000000f;--primary:#2563eb;--primary-hover:#1d4ed8;--danger:#ef4444;--danger-hover:#dc2626;--radius:12px;--radius-sm:10px;--ring:0 0 0 3px #2563eb2e}*{box-sizing:border-box}html,body{height:100%}body{background:radial-gradient(1200px 600px at 20% -10%,#2563eb14,transparent 60%),radial-gradient(1000px 600px at 90% 0%,#0ea5e90f,transparent 55%),var(--bg);color:var(--text);margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,Apple Color Emoji,Segoe UI Emoji;line-height:1.5}a{color:inherit;text-decoration:none}h1{letter-spacing:-.02em;margin:0 0 12px;font-size:28px}h2{color:var(--muted);margin:0;font-size:16px;font-weight:600}p{margin:0}small{color:var(--muted)}button,input,textarea,select{font:inherit}input,textarea,select{border:1px solid var(--border);border-radius:var(--radius-sm);background:#fff;outline:none;width:100%;padding:10px 12px;transition:box-shadow .15s,border-color .15s,transform 50ms}textarea{resize:vertical;min-height:90px}input:focus,textarea:focus,select:focus{box-shadow:var(--ring);border-color:#2563eb8c}button{border-radius:var(--radius-sm);background:var(--primary);color:#fff;cursor:pointer;border:1px solid #0000;padding:10px 12px;font-weight:600;transition:transform 50ms,background .15s,box-shadow .15s;box-shadow:0 1px 2px #00000014}button:hover{background:var(--primary-hover)}button:active{transform:translateY(1px)}button:disabled{cursor:not-allowed;opacity:.55;box-shadow:none}.btn-secondary{color:var(--text);border-color:var(--border2);box-shadow:none;background:#fff}.btn-secondary:hover{background:#f8fafc}.btn-danger{background:var(--danger)}.btn-danger:hover{background:var(--danger-hover)}.nav{z-index:50;-webkit-backdrop-filter:saturate(180%)blur(10px);backdrop-filter:saturate(180%)blur(10px);border-bottom:1px solid var(--border);background:#ffffffd9;position:sticky;top:0}.nav-inner{justify-content:space-between;align-items:center;max-width:980px;margin:0 auto;padding:10px 16px;display:flex}.nav-logo{letter-spacing:-.01em;font-weight:700}.nav-right{gap:6px;display:flex}.nav-link{color:var(--muted);border-radius:999px;padding:8px 12px;font-weight:600;transition:background .15s,color .15s}.nav-link:hover{color:var(--text);background:#f1f5f9}.nav-link-active{color:var(--text);background:#2563eb1a;border:1px solid #2563eb40}.container{max-width:980px;margin:0 auto;padding:18px 16px 48px}.topbar{justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:14px;display:flex}.kicker{color:var(--muted);font-size:13px}.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px}.stack{gap:12px;display:grid}.row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.grid-2{grid-template-columns:1fr 1fr;gap:10px;display:grid}@media (max-width:720px){.grid-2{grid-template-columns:1fr}}.meta{color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px;display:flex}.card{border:1px solid var(--border);border-radius:var(--radius);background:#fff;padding:12px}.badge{border:1px solid var(--border);color:var(--muted);border-radius:999px;align-items:center;gap:6px;padding:4px 8px;font-size:12px;display:inline-flex}.hr{background:var(--border);height:1px;margin:10px 0}.code{border:1px solid var(--border);background:#f8fafc;border-radius:8px;padding:2px 6px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:12px}.reviewBox{border:1px dashed var(--border2);border-radius:var(--radius);background:#f8fafcb3;padding:14px}.answerHidden{color:var(--muted);font-size:13px}.w-auto{width:auto}.flex-1{flex:1}