body { font-family: sans-serif; margin: 0; padding: 0; background: #f4f4f4; color: #222; }
header { background: #222; color: #fff; padding: 20px; text-align: center; }
main { padding: 20px; max-width: 800px; margin: auto; }
h2 { color: #444; }
footer { background: #eee; text-align: center; padding: 10px; font-size: 12px; }
form input[type="email"] { padding: 8px; margin-right: 8px; }
form button { padding: 8px 12px; }
ul li { margin-bottom: 8px; }