body{
    background:#f3f3f3
}
.main-form {
    max-width: 500px;
    margin: auto
}
.form {
    margin-top: 20px;
    border: 1px solid #f3f3f3;
    background:#fff
}
.btn-login {
    width: 100%;
    text-align: center;
    border-radius: 1.72rem;
}