Stirling-PDF/src/main/resources/static/css/imageHighlighter.css

#image-highlighter {
    position: fixed;
    display:flex;
    inset: 0;
    z-index: 10000;
    background-color: rgba(0, 0, 0, 0);
    visibility: hidden;
    align-items: center;
    justify-content: center;
    transition: visbility 0.1s linear, background-color 0.1s linear;
}

#image-highlighter > * {
    max-width: 80vw;
    max-height: 80vh;
    animation: image-highlight .1s linear;
    transition: transform .1s linear, opacity .1s linear;
}

#image-highlighter > *.remove {
    transform: scale(0.8) !important;
    opacity: 0 !important;
}

#image-highlighter:not(:empty) {
    background-color: rgba(0, 0, 0, 0.37);
    visibility: visible;
}

@keyframes image-highlight {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}