.modal-center {
    display: table;
    height: 100%;
    width: 100%;
}

.modal-align-center {
    vertical-align: middle;
}

.modal-content {
    height: inherit;
    margin: 0 auto;
}

.modal-header {
    background-color: black;
}

.modal-title {
    color: white;
}

.modal-dialog {
    max-width: 800px;
    margin: 1.75rem auto;
}