.modal-dialog {
    margin: calc(115px + 2vh) auto 20px !important;
    width: 90%;
    max-width: 900px;
}

.modal-content {
    max-height: 80vh;
    overflow-y: auto;
}

 .modal-body {
    max-height: calc(80vh - 120px);
    overflow-y: auto;
}