#login-main {
    margin-top: 50px;
    margin-bottom: 100px;
}
.section-title {
    text-align: center;
}
form .mdl-card {
    width: 100%;
}

@media (min-width: 400px) {
    #login-main {
        margin-top: 100px;
    }
    .section-title {
        text-align: left;
    }
}