* {
    font-family: Arial, Helvetica, sans-serif;
}

html,
body {
    background-color: #fff;
    border: 0;
    margin: 0;
    padding: 0;
}

.center {
    display: block;
    left: 50%;
    margin-right: -50%;
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 25%;
}