body {
    background-color: rgb(10, 159, 234);
}

.container {
    text-align: center;
    margin: 100px auto;
    max-width: 500px;
    height: 200px;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: blueviolet;
    font-size: 20px;
}

button {
    margin-top: 10px;
    color: #000;
    border-color: blue;
}