body{font-family:system-ui,sans-serif;max-width:720px;margin:0 auto;padding:24px;line-height:1.6;color:#222}
.btn{display:inline-block;background:#4f46e5;color:#fff;padding:14px 28px;border-radius:8px;text-decoration:none;font-weight:600}
footer{margin-top:48px;font-size:.9rem;color:#666}