html, body {
    height: 100%;
    margin: 0;
}

body {
    background: black;
    display: flex;
    align-items: center;
    justify-content: center;
}

.button {
    background: blue;
    color: white;
    padding: 15px 20px;
    font-size: 32px;
    font-family: Arial, Helvetica, sans-serif;
    text-transform: uppercase;
    cursor: pointer;
    position: relative;
}