tweb/src/scss/partials/_mediaViewer.scss

$open-duration: .2s;
//$open-duration: 10s;
$move-duration: .35s;

.media-viewer {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, .88);
  /* color: $color-gray; */
  display: flex;
  align-items: center;
  justify-content: center;

  &-author {
    position: absolute;
    top: 0;
    left: 0;
    height: 60px;
    padding: 8px 8px 8px 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: #8b8b8b;
    transition: $open-duration;

    &:hover {
      color: #fff;
    }
  }

  &-userpic {
    width: 44px;
    height: 44px;
    position: absolute;
    top: 8px;
    left: 20px;
  }

  &-name {
    font-weight: 500;
  }
  
  &-date {
    font-size: 15px;
  }

  &-buttons {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    flex-flow: row nowrap;
    padding: 8px;

    .btn-icon {
      margin: 0 .25rem;
      transition: $open-duration;

      &:hover {
        color: #fff;
      }
    }
  }

  &-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    max-height: 100%;
    max-width: 100%;
    overflow: hidden;
  }

  &-stub {
    flex: 1;
  }

  &-container {
    align-self: center;
    position: relative;
    max-width: 100%;
    max-height: 100%;
    overflow: hidden;
    flex: 1 1 auto;
    display: flex;
    align-items: center;
  }

  &-media {
    visibility: hidden;
  }

  &-caption {
    flex: 1;
    text-align: center;
    color: $color-gray;
    transition: $open-duration;
    max-width: 50vw;
    word-break: break-word;
    overflow: hidden;
    text-overflow: ellipsis;

    &:hover {
      color: #fff;
    }
  }

  &-switcher-left, &-switcher-right {
    position: absolute;
    left: 0;
    top: 0;
    width: 10rem;
    height: 100%;
    cursor: pointer;
    z-index: 5;

    &:hover {
      > span {
        opacity: 1;
      }
    }
  }

  &-switcher-right {
    left: auto;
    right: 0;
  }

  &-prev-button, &-next-button {
    cursor: pointer;
    position: absolute;
    color: #fff;
    font-size: 3rem;
    left: 2rem;
    top: 50%;
    transform: translateY(-50%) rotate(90deg);
    opacity: 0;
    transition: $open-duration opacity;
    z-index: 5;
    /* box-shadow: 0 1px 2px 0 rgba(16, 35, 47, 0.07); */
  }

  &-next-button {
    left: auto;
    right: 2rem;
    transform: translateY(-50%) rotate(-90deg);
  }

  &-mover {
    position: fixed!important;
    z-index: 4;
    display: flex;
    justify-content: center;
    align-items: center; // mb net
    min-height: auto!important;
    //transition: .5s all;
    left: 0;
    top: 0;
    transform-origin: top left;
    overflow: hidden;
    //border-radius: 0;

    .ckin__player {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
    }

    img, video {
      width: 100%;
      height: 100%;
      user-select: none;
      object-fit: cover;
      opacity: 1;
    }

    &.active {
      transition: $open-duration transform;
    }

    &.moving {
      transition: $move-duration transform ease;
    }

    &.hiding {
      img, video {
        transition: $open-duration opacity;
        opacity: 0;
      }
    }
  }

  // возможно тут это вообще не нужно
  &-aspecter {
    width: 100%;
    height: 100%;
    transform: scale(1);
    overflow: hidden;
    position: absolute;
  }

  &-mover.active &-aspecter {
    transition: $open-duration all;
  }
}