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

.pdf-actions_button-container {
    z-index: 2;
    display:flex;
    opacity: 0;
    transition: opacity 0.1s linear;
}

.pdf-actions_container:hover .pdf-actions_button-container {
    opacity: 1;
}

.pdf-actions_button-container > * {
    padding: 0.25rem 0.5rem;
    margin: 3px;
    display: block;
}

.pdf-actions_container svg {
    width: 16px;
    height: 16px;
}
.pdf-actions_container:nth-child(1) .pdf-actions_move-left-button {
    display: none;
}
.pdf-actions_container:last-child .pdf-actions_move-right-button {
    display: none;
}

/* "insert pdf" buttons that appear on the right when hover */
.pdf-actions_insert-file-button-container {
    translate: 0 -50%;
    width: 80px;
    height: 100%;

    z-index: 1;
    opacity: 0;
    transition: opacity 0.2s;
}

.pdf-actions_insert-file-button-container.left {
    left: -20px;
}

.pdf-actions_insert-file-button-container.right {
    right: -20px;
}

html[lang-direction=ltr] .pdf-actions_insert-file-button-container.right {
    display:none;
}

html[lang-direction=rtl] .pdf-actions_insert-file-button-container.left {
    display:none;
}

.pdf-actions_insert-file-button-container.left .pdf-actions_insert-file-button {
    left: 0;
    translate: 0 -50%;
}

.pdf-actions_insert-file-button-container.right .pdf-actions_insert-file-button {
    right: 0;
    translate: 0 -50%;
}

html[lang-direction=ltr] .pdf-actions_container:last-child > .pdf-actions_insert-file-button-container.right {
    display: block;
}


html[lang-direction=rtl] .pdf-actions_container:last-child > .pdf-actions_insert-file-button-container.left {
    display: block;
}

.pdf-actions_insert-file-button-container:hover {
    opacity: 1;
    transition: opacity 0.05s;
}
.pdf-actions_insert-file-button {
    position: absolute;
    top: 50%;
    right: 50%;
    translate: 50% -50%;
    aspect-ratio: 1;
    border-radius: 100px;
}