:root,:root[data-theme=dark]{--bg: #0f172a;--panel: #1e293b;--panel2: #273449;--border: #334155;--text: #e2e8f0;--muted: #94a3b8;--primary: #6366f1;--primary-hover: #4f46e5;--good: #16a34a;--bad: #dc2626;--answer: #a5b4fc;--err-text: #fca5a5;--err-bg: rgba(220, 38, 38, .12);--err-border: rgba(220, 38, 38, .35);--ok-text: #86efac;--ok-bg: rgba(22, 163, 74, .12);--ok-border: rgba(22, 163, 74, .35)}:root[data-theme=light]{--bg: #f1f5f9;--panel: #ffffff;--panel2: #eef2f7;--border: #d3dbe6;--text: #1e293b;--muted: #64748b;--primary: #6366f1;--primary-hover: #4f46e5;--good: #16a34a;--bad: #dc2626;--answer: #4338ca;--err-text: #b91c1c;--err-bg: rgba(220, 38, 38, .1);--err-border: rgba(220, 38, 38, .3);--ok-text: #15803d;--ok-bg: rgba(22, 163, 74, .1);--ok-border: rgba(22, 163, 74, .3)}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}button{cursor:pointer;border:none;border-radius:8px;padding:9px 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