.hidden {
    display: none!important;
}

.slideshow .button {
    font-size: 2.5em;
    cursor: pointer;
    text-shadow: 0 0 0.2em #000;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.slideshow {
    text-align: center;
    max-width: 100vw;
}

.slideshow .slide {
    max-height: 20em;
    max-width: 100%;
    display: block;
    margin: auto;
    box-shadow: #989898 0.1em 0.1em 0.5em 0.2em;
}