immich-public-proxy/app/public/style.css

html {
    background: #191919;
}

#lightgallery a {
    position: relative;
    display: inline-block;
    text-decoration: none;
    margin: 0;
    padding: 0;
    cursor: pointer;
}

#lightgallery img {
    max-height: 250px;
    margin: 4px;
}

@media (max-width: 800px) {
    #lightgallery a {
        width: calc(100vw / 3 - 10px);
        height: calc(100vw / 3 - 10px);
        overflow: hidden;
    }

    #lightgallery img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center;
    }
}

.play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background-image: url('/images/play.png');
    background-size: contain;
    background-repeat: no-repeat;
    opacity: 0.5;
}

#lightgallery a:has(.play-icon):hover .play-icon {
    opacity: 1;
}

#password {
    color: white;
}

#header {
    font-family: system-ui, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, Helvetica, Arial, "Helvetica Neue", sans-serif;
    color: white;
    width: 100%;
    display: flex;
}

#header h1 {
    font-size: 18pt;
    font-weight: bold;
    margin: 4px;
}

#download-all {
    margin: auto 4px auto auto;
}