.ui-dialog-titlebar-close {
    visibility: hidden;
}

.loader {
    border: 4px solid #DEDB00;
    border-top: 4px solid #52514F;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 2s linear infinite;
    margin: 30px;
    z-index: 1;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}