:root{--bg:#0b1020;--panel:#121a33;--panel2:#0f1730;--text:#e9ecff;--muted:#b6bce6;--border:#ffffff1f;--good:#47d18c;--warn:#ffcf5a;--bad:#ff6b6b;--link:#82b1ff;--quizSurface:#f7f3ea;--quizSurface2:#fffdf7;--quizText:#0b0f1a;--quizMuted:#3a4256;--quizBorder:#0b0f1a24;--quizLink:#1f76f0}*{box-sizing:border-box}html,body{height:100%}body{background:radial-gradient(1200px 800px at 20% 0%,#18255a 0%,var(--bg)60%);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}a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1100px;margin:0 auto;padding:28px}.h1{letter-spacing:.2px;font-size:28px;font-weight:800}.sub{color:var(--muted);margin-top:6px}.row{flex-wrap:wrap;gap:16px;display:flex}.card{background:linear-gradient(180deg,var(--panel)0%,var(--panel2)100%);border:1px solid var(--border);border-radius:16px;padding:16px;box-shadow:0 10px 30px #00000040}.card h2{margin:0 0 10px;font-size:16px}.small{color:var(--muted);font-size:12px}.btn{border:1px solid var(--border);color:var(--text);cursor:pointer;background:#ffffff0f;border-radius:12px;padding:10px 12px;font-weight:700}.btn:hover{background:#ffffff1a}.btn:disabled{opacity:.45;cursor:not-allowed}.pill{border:1px solid var(--border);background:#ffffff0a;border-radius:999px;align-items:center;gap:8px;padding:6px 10px;display:inline-flex}.pill.good{border-color:#47d18c59}.pill.warn{border-color:#ffcf5a59}.pill.bad{border-color:#ff6b6b59}.grid{grid-template-columns:1.2fr 1fr;gap:16px;display:grid}@media (max-width:980px){.grid{grid-template-columns:1fr}}.table{border-collapse:collapse;width:100%}.table th,.table td{border-bottom:1px solid var(--border);text-align:left;vertical-align:top;padding:10px 8px;font-size:13px}.table th{color:var(--muted);font-weight:700}.kv{grid-template-columns:170px 1fr;gap:6px 12px;font-size:13px;display:grid}.kv div:nth-child(odd){color:var(--muted)}.code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace}.hr{background:var(--border);height:1px;margin:14px 0}.question{border:1px solid var(--border);background:#ffffff08;border-radius:12px;padding:12px}.choice{gap:10px;margin-top:6px;display:flex}.choice .tag{border:1px solid var(--border);min-width:28px;height:28px;color:var(--muted);border-radius:8px;justify-content:center;align-items:center;display:inline-flex}.choice.correct .tag{color:var(--good);border-color:#47d18c80}.notice{border:1px solid var(--border);background:#ffffff08;border-radius:12px;padding:12px}.notice b{margin-bottom:4px;display:block}.quizSurface{background:var(--quizSurface);color:var(--quizText);border:1px solid var(--quizBorder);border-radius:16px;box-shadow:0 14px 40px #0000004d}.quizSurface a{color:var(--quizLink)}.quizSurface a:hover{text-decoration:underline}.quizSurface .small{color:var(--quizMuted)}.quizSurface .hr{background:#0b0f1a1f}.quizSurface .question{background:#00000008;border:1px solid #0b0f1a24}.quizSurface .choice .tag{color:var(--quizMuted);background:#ffffffb3;border:1px solid #0b0f1a24}.quizSurface .choice.correct .tag{color:#1b6b3f;border-color:#47d18c8c}.quizSurface .notice{background:#ffffffb8;border:1px solid #0b0f1a24}