:root{color-scheme:dark;--bg:#0b0d10;--fg:#e6e9ef;--muted:#8b93a1;--accent:#4f9cf9;--line:#1e242c}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.6 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.wrap{max-width:720px;margin:0 auto;padding:48px 24px}h1{font-size:1.7rem;letter-spacing:-.02em}a{color:var(--accent)}.muted{color:var(--muted)}.card{border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin-top:24px}button,input{font:inherit}input{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--line);background:#10151b;color:var(--fg);margin:8px 0 16px}button{padding:10px 18px;border-radius:8px;border:0;background:var(--accent);color:#04101f;font-weight:600;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}pre{white-space:pre-wrap;word-break:break-word;background:#10151b;border:1px solid var(--line);border-radius:8px;padding:16px;overflow-x:auto}.err{color:#ff6b6b}