discourse/app/assets/stylesheets/common/base/lightbox.scss

.d-lazyload-hidden {
  box-sizing: border-box;
}

.onebox img.d-lazyload-hidden:not(.ytp-thumbnail-image) {
  border: 1px solid var(--content-border-color);
}

.cooked img.d-lazyload:not(.animated) {
  transition: opacity 0.4s 0.75s ease;
}

.lightbox-wrapper {
  display: inline-block;
  vertical-align: middle;

  img {
    object-fit: cover;
    object-position: top;
  }

  &,
  * {
    outline: 0;
  }

  .lightbox {
    position: relative;
    display: inline-block;
    overflow: hidden;

    &:hover .meta {
      user-select: none;
      opacity: 0.9;
      transition: opacity 0.5s;
    }

    .meta {
      --meta-element-margin: 0.375em;
      position: absolute;
      bottom: 0;
      width: 100%;
      color: var(--secondary);
      background: var(--primary);
      opacity: 0;
      transition: opacity 0.2s;
      display: flex;
      align-items: center;

      @media (pointer: coarse) {
        align-items: center;
        background: var(--secondary);
        color: var(--primary-high);
        height: 25px;
        width: 25px;
        bottom: 0;
        right: 0;
        opacity: 0.8;
        transition: opacity 500ms;

        &.open {
          opacity: 0;
        }
      }
    }
  }

  .filename {
    margin: var(--meta-element-margin);

    @include ellipsis;

    @media (pointer: coarse) {
      display: none;
    }
  }

  .d-icon {
    margin: var(--meta-element-margin);
    opacity: 0.8;
    color: var(--secondary);

    + .filename {
      margin-left: 0;
    }

    &.d-icon-far-image {
      @media (pointer: coarse) {
        display: none;
      }
    }
  }

  .informations {
    margin: var(--meta-element-margin);
    padding-right: 20px;
    color: var(--secondary-high);
    font-size: var(--font-0);
    flex-shrink: 0;
    flex-grow: 3;

    @media (pointer: coarse) {
      display: none;
    }
  }

  @media (pointer: coarse) {
    .d-icon-discourse-expand {
      color: var(--primary-high);
    }
  }
}

.discourse-no-touch {
  a.lightbox {
    transition: all 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
  }

  a.lightbox:hover {
    box-shadow:
      0 2px 5px 0 rgb(var(--always-black-rgb), 0.2),
      0 2px 10px 0 rgb(var(--always-black-rgb), 0.2);
  }
}

.rtl {
  .pswp__scroll-wrap,
  .pswp__bg,
  .pswp__container,
  .pswp__item,
  .pswp__content,
  .pswp__img,
  .pswp__zoom-wrap {
    right: 0;
    left: unset;
  }

  .pswp .pswp__top-bar .pswp__button .pswp__icn {
    right: 6px;
    left: unset;
  }

  .pswp__button--arrow--next {
    left: 0 !important;
    right: unset !important;

    .pswp__icn {
      right: unset;
      left: 6px;
    }
  }

  .pswp__button--arrow--prev {
    left: unset !important;
    right: 0 !important;

    .pswp__icn {
      left: unset;
      right: 6px;
    }
  }
}

.pswp.pswp--behind-header {
  z-index: z("header") - 1;
}

// photoswipe custom caption
.pswp__caption {
  left: 0;
  bottom: var(--safe-area-inset-bottom);
  width: 100%;
  text-align: center;
  position: absolute;

  .pswp__caption-title {
    left: 50%;
    bottom: 0;
    color: #fff;
    line-height: 1.25em;
    position: relative;
    max-width: 800px;
    padding: 0 1em 0.25em;
    transform: translateX(-50%);
    transition: transform 0.4s ease;
  }

  .pswp__caption-details {
    position: relative;
    left: 50%;
    bottom: 0;
    color: #000;
    background: #fff;
    border-radius: 4px;
    max-width: 200px;
    font-size: var(--font-down-1);
    transform: translate(-50%, 100%);
    opacity: 0;
    transition:
      transform 0.4s ease,
      opacity 0.4s ease;
  }
}

.pswp--caption-expanded .pswp__caption-title {
  transform: translate(-50%, -5px);
}

.pswp--caption-expanded .pswp__caption-details {
  transform: translate(-50%, -5px);
  opacity: 1;
}

.pswp .pswp__top-bar .pswp__button {
  width: 45px;

  .pswp__icn {
    left: 6px;
  }
}

.pswp__button--original-image svg,
.pswp__button--image-info svg,
.pswp__button--quote-image svg {
  padding: 0.32em;
}

.pswp__custom-counter {
  height: 30px;
  margin-top: 15px;
  margin-inline-start: 20px;
  font-size: 14px;
  line-height: 30px;
  color: var(--pswp-icon-color);
  text-shadow: 1px 1px 3px var(--pswp-icon-color-secondary);
  opacity: 0.85;
}

.pswp--one-slide .pswp__custom-counter {
  display: none;
}