html, body {
    padding: 0;
    margin: 0;
    height: 100%;
    font-family: 'helvetica', sans-serif;
    font-size: 18px;
}

a {
    color: #0741DD;
}

.button {
    display: block;
}

.wrapper div {
    text-align: center;
}

.wrapper {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}