.cmo-options-page.cmb2-options-page {
    max-width: 100%;
}

.cmo-options-page.cmb2-options-page .cmb2-metabox > .cmb-row {
    border: none;
    box-shadow: none;
}

.cmo-options-page.cmb2-options-page .cmb2-metabox > .cmb-row:not(:first-of-type) {
    border-top: 1px solid #e9e9e9;
}