.container { max-width: 600px; margin: 20px auto; }
form { display: flex; flex-direction: column; gap: 10px; }
input, textarea { padding: 8px; border: 1px solid #ccc; border-radius: 5px; }
button { padding: 10px; background: #0077cc; color: #fff; border: none; border-radius: 5px; cursor: pointer; }
.success { margin-top: 15px; color: green; }