body {
    font-family: Arial, sans-serif;
    background: #f3f3f3;
}

.container {
    width: 400px;
    margin: 100px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 0 10px #ccc;
}

input, button {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
}