#pdfViewerFrame, #wordViewerFrame, #pptViewerFrame, #videoViewer {
    position: absolute;
    top: 10%;
    left: 10%;
    width: 80%;
    height: 80%;
    border: 2px solid black;
    display: none;
    object-fit: fill;
}

.hidden {
    visibility: hidden;
}

.visible {
    visibility: visible;
}

.canvas-full-mode {
    width: 100vw !important;
    height: 100vh !important;
}