.signin-center {
    width: 425px;
}

.signin-link {
    font-size: 1em !important;
    font-weight: 400 !important;
    text-align: center;
}

@media only screen and (max-width: 600px) {
    .signin-center {
        width: 100% !important;
        min-height: 100vh !important;
    }
}