body{
    margin-top: 100px;
}
.form-container {
    float: none;
    margin: 0 auto;
    width: 400px;
}
.login-title{
    text-align: center;
}

@media (max-width: 480px) {
    body{
        margin-top: 0px;
    }
    .form-container {
        width: auto;
    }
}