body { font-family: Arial, sans-serif; margin:0; background:#f4f4f4; }
header { background:#222; color:#fff; padding:20px 0; text-align:center; }
main { max-width:600px; margin:40px auto; background:#fff; padding:30px; border-radius:8px; box-shadow:0 2px 8px #ccc; }
#email-address { font-weight:bold; margin-top:10px; font-size:1.2em; }
#inbox { margin-top:30px; }
footer { text-align:center; background:#eee; padding:15px 0; margin-top:40px; }
footer a { margin:0 8px; color:#444; text-decoration:none; }
button { padding:10px 20px; font-size:1em; background:#222; color:#fff; border:none; border-radius:5px; cursor:pointer; }
button:hover { background:#444; }