:root{color-scheme:light dark;--accent: #2563eb;--bg: #0f172a;--card: #1e293b;--fg: #e2e8f0;--muted: #94a3b8}*{box-sizing:border-box}body{margin:0;font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--fg)}a{color:#93c5fd}button{background:var(--accent);color:#fff;border:0;border-radius:6px;padding:8px 14px;font:inherit;cursor:pointer}button.secondary{background:#334155}.card{background:var(--card);border-radius:10px;padding:20px;margin:16px 0}.muted{color:var(--muted)}code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px}pre{background:#0b1220;padding:12px;border-radius:8px;overflow:auto}