body { font-family: Arial, sans-serif; margin: 20px; }
form { max-width: 360px; margin-bottom: 20px; }
label { display: block; margin-top: 10px; }
input { width: 100%; padding: 8px; box-sizing: border-box; }
button { margin-top: 15px; padding: 8px 12px; }
pre { background: #f4f4f4; padding: 10px; }