:root{--bg:#fafaf9;--fg:#1c1917;--muted:#78716c;--line:#e7e5e4;--accent:#2563eb;--danger:#b91c1c;--card:#ffffff;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--bg:#0c0a09;--fg:#f5f5f4;--muted:#a8a29e;--line:#292524;--accent:#60a5fa;--danger:#f87171;--card:#1c1917}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.5 system-ui,-apple-system,Segoe UI,sans-serif}a{color:var(--accent)}.top{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid var(--line)}.brand{font-weight:700;color:var(--fg);text-decoration:none}.page{max-width:760px;margin:0 auto;padding:24px 16px 64px}.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px;margin:16px 0}.card h2{margin:0 0 8px;font-size:17px}.muted{color:var(--muted)}.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.stack{display:grid;grid-gap:8px;gap:8px;max-width:360px}button,input,select{font:inherit;padding:8px 10px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--fg)}button{cursor:pointer}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.danger{color:var(--danger);border-color:var(--danger)}button:disabled{opacity:.6;cursor:default}.error{color:var(--danger)}ul.plain{list-style:none;padding:0;margin:0}ul.plain li{display:flex;justify-content:space-between;gap:8px;padding:8px 0;border-top:1px solid var(--line)}ul.plain li:first-child{border-top:0}.qr{max-width:220px;width:100%;height:auto}code.copy{display:block;word-break:break-all;font-size:12px;padding:8px;border:1px dashed var(--line)}