body { background: #111; color: #fff; font-family: sans-serif; padding: 
    20px;
}
form { display: flex; flex-direction: column; max-width: 400px;
}
input, textarea { margin: 5px 0; padding: 8px;
}
button { padding: 10px; background: #00ff88; border: none; cursor: pointer;
}