stacker.news/styles/login.module.css

.login .providerButton {
    width: 100%;
    justify-content: center;
    align-items: center;
    display: flex;
}

.page {
    position: absolute;
    width: 100%;
    height: 100%;
    display: table;
    margin: 0;
    padding: 0;
    top: 0;
    z-index: -1;
}

.login {
    display: table-cell;
    vertical-align: middle;
    padding: .5rem;
}

.login > * {
    max-width: 300px;
    margin: auto;
}