.previewurl_dialog_background { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.85); z-index: 10000; }
.previewurl_dialog_main { position: absolute; top: 10%; left: 10%; width: 80%; height: 80%; text-align: center; }
.previewurl_dialog_main img { position: relative; top: 50%; transform: perspective(1px) translateY(-50%); max-width: 100%; max-height: 100%; }
.previewurl_dialog_main audio { position: relative; top: 50%; transform: perspective(1px) translateY(-50%); width: 100%; }
.previewurl_dialog_main video { position: relative; top: 50%; transform: perspective(1px) translateY(-50%); max-width: 100%; max-height: 100%; }
.previewurl_dialog_main iframe { position: relative; width: 100%; height: 100%; }