:root{--bg:#0b1220;--card:#121a2c;--fg:#e5ecff;--muted:#9bb0ff}body,html{background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial}.wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:40px}.card{background:var(--card);border-radius:16px;padding:28px;max-width:720px;width:100%;box-shadow:0 10px 30px rgba(0,0,0,.25)}h1{margin:0 0 16px;font-size:28px}p{color:var(--muted)}.btn{display:inline-block;background:#4c7dff;color:#fff;padding:12px 18px;border-radius:12px;text-decoration:none;border:0;cursor:pointer;font-weight:600}input,textarea{width:100%;padding:10px 12px;border-radius:10px;border:1px solid #203054;background:#0f1627;color:#e5ecff}.row{display:grid;grid-gap:12px;gap:12px;grid-template-columns:1fr 1fr}.mt{margin-top:16px}code{background:#0f1627;padding:2px 6px;border-radius:6px}hr{border:0;border-top:1px solid #223159;margin:20px 0}small{color:#9bb0ff}