.form-with-sidebar {
    display: block;
}


.form-with-sidebar .main-options {max-width: 100%;}

.form-with-sidebar .right-options {
    margin: -15px -15px 15px;
    border: none;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
}

.form-with-sidebar .main-options + .right-options {
    margin: 0 -15px -15px;
    border: none;
    border-top: 1px solid var(--border);
}