body{font-family:Arial,Helvetica,sans-serif;margin:20px;background:#f6f7fb;color:#111}
header{margin-bottom:20px}
header h1{margin:0}
a{color:#0b67ff}
form label{display:block;margin-bottom:10px}
input,textarea{width:100%;padding:8px;margin-top:4px;border:1px solid #ccc;border-radius:4px}
button{background:#0b67ff;color:#fff;padding:8px 12px;border:none;border-radius:4px}
.rule{border:1px solid #ddd;padding:10px;margin:8px 0;background:#fff}