zulip/static/styles/lightbox.scss

#lightbox_overlay {
    background-color: hsl(227, 40%, 16%);
}

#lightbox_overlay .image-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 100%;
    height: calc(100% - 65px - 95px);
    margin: 0px;

    background-size: contain;
    background-repeat: no-repeat;
    background-position: center center;

    img {
        max-height: 100%;
        max-width: 100%;

        background-color: hsl(0, 0%, 100%);
        background-image:
            -moz-linear-gradient(45deg, hsl(0, 0%, 80%) 25%, transparent 25%),
            -moz-linear-gradient(-45deg, hsl(0, 0%, 80%) 25%, transparent 25%),
            -moz-linear-gradient(45deg, transparent 75%, hsl(0, 0%, 0%) 75%),
            -moz-linear-gradient(-45deg, transparent 75%, hsl(0, 0%, 0%) 75%);
        background-image:
            -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.25, hsl(0, 0%, 80%)), color-stop(.25, transparent)),
            -webkit-gradient(linear, 0 0, 100% 100%, color-stop(.25, hsl(0, 0%, 80%)), color-stop(.25, transparent)),
            -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.75, transparent), color-stop(.75, hsl(0, 0%, 80%))),
            -webkit-gradient(linear, 0 0, 100% 100%, color-stop(.75, transparent), color-stop(.75, hsl(0, 0%, 80%)));

        -moz-background-size: 20px 20px;
        background-size: 20px 20px;
        -webkit-background-size: 20px 20px;

        background-position: 0 0, 50px 0, 50px -50px, 0px 50px;
    }

    canvas {
        cursor: pointer;
    }
}

#lightbox_overlay .exit {
    float: right;

    color: hsla(0, 0%, 100%, 0.8);
    font-size: 2rem;
    font-weight: 200;
    margin: 24px 20px 0px 0px;

    transform: scaleY(0.75);
    font-weight: 300;

    opacity: 0;
    pointer-events: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

#lightbox_overlay.show .exit {
    pointer-events: auto;
    opacity: 1;
}

#lightbox_overlay .image-info-wrapper {
    background-color: transparent;
}

#lightbox_overlay .image-description,
#lightbox_overlay .image-actions {
    float: left;
    margin: 20px 20px;
}

#lightbox_overlay .image-actions {
    float: right;
}

#lightbox_overlay .image-actions .lightbox-canvas-trigger {
    display: inline-block;
    vertical-align: top;

    min-width: 75px;

    margin: 0px;
    margin-right: 5px;
    padding: 0px 5px;

    border-radius: 4px;

    border: 1px solid rgba(255, 255, 255, 0.6);

    text-align: center;
    color: hsl(0, 0%, 100%);

    cursor: pointer;

    transition: all 0.3s ease;
}

#lightbox_overlay .image-actions .lightbox-canvas-trigger:hover {
    background-color: hsl(0, 0%, 100%);
    border: 1px solid hsl(0, 0%, 100%);
    color: hsl(227, 40%, 16%);
    opacity: 1;
}

#lightbox_overlay .image-actions .lightbox-canvas-trigger .status::after {
    content: attr(data-disabled);
    text-transform: uppercase;

    opacity: 0.7;
}

#lightbox_overlay .image-actions .lightbox-canvas-trigger.enabled .status::after {
    content: attr(data-enabled);
}

#lightbox_overlay .image-actions .lightbox-canvas-trigger .title {
    font-weight: 600;
}

#lightbox_overlay .image-actions .lightbox-canvas-trigger .status {
    margin-top: -7px;
}

#lightbox_overlay .image-actions a {
    margin: 0px 5px;
}

#lightbox_overlay .image-actions .icon {
    font-size: 1.1rem;
    display: inline-block;
}

#lightbox_overlay .image-actions .icon .text {
    font-size: 0.9rem;
}

#lightbox_overlay .image-actions span:nth-of-type(2) {
    position: relative;
    top: 1px;
}

#lightbox_overlay .image-actions .open span:nth-of-type(2) {
    top: 2px;
}

#lightbox_overlay .image-description {
    width: 100%;
    /* approx width of screen minus action buttons on the side. */
    max-width: calc(100% - 450px);
    /* add some extra margin top and remove some bottom to keep the
       height the same. and vertically center the text with the buttons. */
    margin-top: 25px;
    margin-bottom: 15px;

    font-size: 1.3rem;
    color: hsl(0, 0%, 100%);

    .title {
        display: inline-block;
        vertical-align: top;

        font-weight: 400;
        line-height: normal;
        max-width: calc(100% - 110px);

        /* Required for text-overflow */
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .user {
        max-width: 200px;
        display: inline-block;
        vertical-align: top;
        font-weight: 300;
        line-height: normal;
        text-overflow: ellipsis;
        overflow: hidden;
        white-space: pre;

        &::before {
            margin-right: 5px;
            content: "\2014";
        }
    }
}

#lightbox_overlay .player-container {
    height: calc(100% - 65px - 95px);
    display: flex;
    text-align: center;
    justify-content: center;
    align-items: center;

    iframe {
        /* maintain 16:9 ratio. */
        width: calc((100vh - 65px - 95px) * 16 / 9);
        height: 100%;
        margin: auto;
    }
}

#lightbox_overlay .center .arrow {
    display: inline-block;
    vertical-align: top;
    margin-top: 25px;
    padding: 5px 10px;

    color: hsl(0, 0%, 100%);
    font-size: 1.8em;
    font-weight: 100;

    transform: scaleY(2);
    cursor: pointer;

    opacity: 0.5;
    transition: all 0.3s ease;
}

#lightbox_overlay .center .arrow:hover {
    opacity: 1;
}

#lightbox_overlay .center .image-list {
    position: relative;
    display: inline-block;
    padding: 15px 0px 12px 0px;
    height: 50px;
    font-size: 0px;

    max-width: 40vw;
    overflow: hidden;
    white-space: nowrap;
}

#lightbox_overlay .center .image-list .image {
    display: inline-block;
    vertical-align: top;
    width: 50px;
    height: 50px;
    margin: 0px 2px;

    background-color: hsla(0, 0%, 94%, 0.2);
    opacity: 0.5;

    background-size: cover;
    background-position: center;
    cursor: pointer;
}

#lightbox_overlay .center .image-list .image.selected {
    opacity: 1;
}

#lightbox_overlay .image-actions .button {
    font-size: 0.8rem;
    min-width: inherit;
    padding: 4px 10px;
    border: 1px solid hsla(0, 0%, 100%, 0.6);
    background-color: transparent;
    color: hsl(0, 0%, 100%);
    border-radius: 4px;
}

#lightbox_overlay .image-actions .button:hover {
    background-color: hsl(0, 0%, 100%);
    border-color: hsl(0, 0%, 100%);
    color: hsl(227, 40%, 16%);
}

#lightbox_overlay .image-actions a.button {
    text-decoration: none;
}

#lightbox_overlay .button .download {
    top: 1px;
}

#lightbox_overlay .clear-float {
    clear: both;
}

@media only screen and (min-width: 320px) and (max-width: 736px) {
    #lightbox_overlay {
        .image-actions {
            float: left;
            margin-top: 0;
        }

        .image-description {
            max-width: calc(100% - 100px);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 5px;

            .title {
                max-width: calc(100% - 70px);
            }
        }

        .center .image-list {
            max-width: 80vw;
        }

        .player-container iframe {
            /* maintain 16:9 ratio. */
            width: 100%;
            height: calc((100vw) * 9 / 16);
            margin: auto;
        }

        .image-preview {
            height: calc(100% - 101px - 95px);
        }
    }
}