body { font-family: Arial, sans-serif; max-width: 600px; margin: 20px auto; }
h1, h2 { color: #333; }
label { display: block; margin-top: 10px; }
input { width: 100%; padding: 5px; margin-top: 5px; }
button { margin-top: 10px; padding: 8px 15px; background: #28a745; color: #fff; border: none; cursor: pointer; }
.success { color: green; }