/* Hide ONLY the Guests Registration section */
#idGuestsRegistrationDivider {
    display: none !important;
}
/* Align Add Guest with other buttons visually */
#idSectionGuestListContainer {
    margin-bottom: 10px;
}

/* Make Add Guest sit closer to navigation buttons */
#idSectionGuestListContainer input {
    margin-bottom: -10px;
}