:root{color-scheme:light;--bg: #ffffff;--fg: #0b0b0b;--muted: #6b7280;--border: #e5e7eb;--card: #f7f7f8}*{box-sizing:border-box}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial;background:var(--bg);color:var(--fg)}.container{max-width:980px;margin:0 auto;padding:16px}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border:1px solid var(--border);border-radius:14px}.logo{width:28px;height:28px;border-radius:10px;border:1px solid var(--border)}.card{margin-top:12px;border:1px solid var(--border);border-radius:14px;padding:14px}.note{color:var(--muted);font-size:12px}.btn{margin-top:10px;padding:10px 12px;border-radius:12px;border:1px solid #111827;background:#111827;color:#fff;cursor:pointer}