*{box-sizing:border-box}body{font-family:system-ui,Arial,sans-serif;margin:0;color:#222;background:#fafafa;line-height:1.6}
header{background:#2e7d32;color:#fff;padding:24px 16px}h1{margin:0;font-size:22px}
main{max-width:720px;margin:0 auto;padding:24px 16px}h2{color:#2e7d32}
.btn{display:inline-block;margin-top:16px;padding:10px 20px;background:#2e7d32;color:#fff;text-decoration:none;border-radius:6px}
footer{max-width:720px;margin:0 auto;padding:24px 16px;color:#888}