.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0;
}

.lightbox.active {
    opacity: 1;
    pointer-events: initial;
}

.lightbox-content {
    position: absolute;
    top: 50%;
    left: 50%;
    max-height: calc(100%-8em);
    max-width: calc(100%-8em);
    transform: translate(-50%, -50%);
}

.lightbox-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    cursor: pointer;
}

.lightbox-content img {
    max-height: 100%;
    max-width: 100%;
}

.lightbox-content::after {
    /*creates an element after another*/
    content: '\2715';
    position: absolute;
    top: -1em;
    right: -1em;
    width: 2em;
    height: 2em;
    line-height: 2em;
    text-align: center;
    background-color: white;
    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
    border-radius: 2em;
    pointer-events: none;
}