.container {
    width: 300px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ccc;
    text-align: center;
}

input[type=text], input[type=password] {
    margin-bottom: 10px;
    width: 100%;
    padding: 5px;
}

input[type=submit] {
    width: 100%;
    padding: 10px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}