.form-signin {
    width: 100%;
    max-width: 420px;
    padding: 15px;
    margin: 0 auto;
    border: 1px solid #dadce0;
    border-radius: 8px;
}

.content-form::before {
    min-height: 30px;

}

.content-form::before, .content-form::after {
    box-flex: 1;
    flex-grow: 1;
    content: '';
    display: block;
    height: 110px;
}