.modal-title {
    margin: 0 !important;
}
.modal-dialog.modal-fullHeight {
    margin: 30px auto; /* marge identique haut/bas */
    width: auto;
    max-width: 900px;   /* optionnel, comme modal-lg */
    height: calc(100% - 60px); /* hauteur dispo en tenant compte de la marge */
    display: flex;
    flex-direction: column;
}

.modal-dialog.modal-fullHeight .modal-content {
    flex: 1 1 auto;
    max-height: 100%;
    display: flex;
    flex-direction: column;
}

.modal-dialog.modal-fullHeight .modal-header,
.modal-dialog.modal-fullHeight .modal-footer {
    flex: 0 0 auto;
}

.modal-dialog.modal-fullHeight .modal-body {
    flex: 1 1 auto;
    overflow-y: auto;
    min-height: 0; /* crucial pour le scroll */
    -webkit-overflow-scrolling: touch;
}