File: assets/gallerytypes/viewerjs/src/css/viewer.css

.viewer-zoom-in::before,
.viewer-zoom-out::before,
.viewer-one-to-one::before,
.viewer-reset::before,
.viewer-prev::before,
.viewer-play::before,
.viewer-next::before,
.viewer-rotate-left::before,
.viewer-rotate-right::before,
.viewer-flip-horizontal::before,
.viewer-flip-vertical::before,
.viewer-fullscreen::before,
.viewer-fullscreen-exit::before,
.viewer-close::before {
  background-image: url('../images/icons.png');
  background-repeat: no-repeat;
  color: transparent;
  display: block;
  font-size: 0;
  height: 20px;
  line-height: 0;
  width: 20px;
}

.viewer-zoom-in::before {
  background-position: 0 0;
  content: 'Zoom In';
}

.viewer-zoom-out::before {
  background-position: -20px 0;
  content: 'Zoom Out';
}

.viewer-one-to-one::before {
  background-position: -40px 0;
  content: 'One to One';
}

.viewer-reset::before {
  background-position: -60px 0;
  content: 'Reset';
}

.viewer-prev::before {
  background-position: -80px 0;
  content: 'Previous';
}

.viewer-play::before {
  background-position: -100px 0;
  content: 'Play';
}

.viewer-next::before {
  background-position: -120px 0;
  content: 'Next';
}

.viewer-rotate-left::before {
  background-position: -140px 0;
  content: 'Rotate Left';
}

.viewer-rotate-right::before {
  background-position: -160px 0;
  content: 'Rotate Right';
}

.viewer-flip-horizontal::before {
  background-position: -180px 0;
  content: 'Flip Horizontal';
}

.viewer-flip-vertical::before {
  background-position: -200px 0;
  content: 'Flip Vertical';
}

.viewer-fullscreen::before {
  background-position: -220px 0;
  content: 'Enter Full Screen';
}

.viewer-fullscreen-exit::before {
  background-position: -240px 0;
  content: 'Exit Full Screen';
}

.viewer-close::before {
  background-position: -260px 0;
  content: 'Close';
}

.viewer-container {
  bottom: 0;
  direction: ltr;
  font-size: 0;
  left: 0;
  line-height: 0;
  overflow: hidden;
  position: absolute;
  right: 0;
  -webkit-tap-highlight-color: transparent;
  top: 0;
  -webkit-touch-callout: none;
  touch-action: none;
  user-select: none;

  &::selection,
  & *::selection {
    background-color: transparent;
  }

  & img {
    display: block;
    height: auto;
    max-height: none !important;
    max-width: none !important;
    min-height: 0 !important;
    min-width: 0 !important;
    width: 100%;
  }
}

.viewer-canvas {
  bottom: 0;
  left: 0;
  overflow: hidden;
  position: absolute;
  right: 0;
  top: 0;

  & > img {
    height: auto;
    margin: 15px auto;
    max-width: 90% !important;
    width: auto;
  }
}

.viewer-footer {
  bottom: 0;
  left: 0;
  overflow: hidden;
  position: absolute;
  right: 0;
  text-align: center;
}

.viewer-navbar {
  background-color: rgba(0, 0, 0, .5);
  overflow: hidden;
}

.viewer-list {
  box-sizing: content-box;
  height: 50px;
  margin: 0;
  overflow: hidden;
  padding: 1px 0;

  & > li {
    color: transparent;
    cursor: pointer;
    float: left;
    font-size: 0;
    height: 50px;
    line-height: 0;
    opacity: .5;
    overflow: hidden;
    transition: opacity .15s;
    width: 30px;

    &:hover {
      opacity: .75;
    }

    & + li {
      margin-left: 1px;
    }
  }

  & > .viewer-loading {
    position: relative;

    &::after {
      border-width: 2px;
      height: 20px;
      margin-left: -10px;
      margin-top: -10px;
      width: 20px;
    }
  }

  & > .viewer-active,
  & > .viewer-active:hover {
     opacity: 1;
  }
}

.viewer-player {
  background-color: #000;
  bottom: 0;
  cursor: none;
  display: none;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;

  & > img {
    left: 0;
    position: absolute;
    top: 0;
  }
}

.viewer-toolbar {
  & ul {
    display: inline-block;
    margin: 0 auto 5px;
    overflow: hidden;
    padding: 3px 0;
  }

  & li {
    background-color: rgba(0, 0, 0, .5);
    border-radius: 50%;
    cursor: pointer;
    float: left;
    height: 24px;
    overflow: hidden;
    transition: background-color .15s;
    width: 24px;

    &:hover {
      background-color: rgba(0, 0, 0, .8);
    }

    &::before {
      margin: 2px;
    }

    & + li {
      margin-left: 1px;
    }
  }

  & .viewer-small {
    height: 18px;
    margin-bottom: 3px;
    margin-top: 3px;
    width: 18px;

    &::before {
      margin: -1px;
    }
  }

  & .viewer-large {
    height: 30px;
    margin-bottom: -3px;
    margin-top: -3px;
    width: 30px;

    &::before {
      margin: 5px;
    }
  }
}

.viewer-tooltip {
  background-color: rgba(0, 0, 0, 0.8);
  border-radius: 10px;
  color: #fff;
  display: none;
  font-size: 12px;
  height: 20px;
  left: 50%;
  line-height: 20px;
  margin-left: -25px;
  margin-top: -10px;
  position: absolute;
  text-align: center;
  top: 50%;
  width: 50px;
}

.viewer-title {
  color: #ccc;
  display: inline-block;
  font-size: 12px;
  line-height: 1;
  margin: 0 5% 5px;
  max-width: 90%;
  opacity: .8;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: opacity .15s;
  white-space: nowrap;

  &:hover {
    opacity: 1;
  }
}

.viewer-button {
  background-color: rgba(0, 0, 0, .5);
  border-radius: 50%;
  cursor: pointer;
  height: 80px;
  overflow: hidden;
  position: absolute;
  right: -40px;
  top: -40px;
  transition: background-color .15s;
  width: 80px;

  &:focus,
  &:hover {
    background-color: rgba(0, 0, 0, .8);
  }

  &::before {
    bottom: 15px;
    left: 15px;
    position: absolute;
  }
}

.viewer-fixed {
  position: fixed;
}

.viewer-open {
  overflow: hidden;
}

.viewer-show {
  display: block;
}

.viewer-hide {
  display: none;
}

.viewer-backdrop {
  background-color: rgba(0, 0, 0, .5);
}

.viewer-invisible {
  visibility: hidden;
}

.viewer-move {
  cursor: move;
  cursor: grab;
}

.viewer-fade {
  opacity: 0;
}

.viewer-in {
  opacity: 1;
}

.viewer-transition {
  transition: all .3s;
}

@keyframes viewer-spinner {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

.viewer-loading {
  &::after {
    animation: viewer-spinner 1s linear infinite;
    border: 4px solid rgba(255, 255, 255, .1);
    border-left-color: rgba(255, 255, 255, .5);
    border-radius: 50%;
    content: '';
    display: inline-block;
    height: 40px;
    left: 50%;
    margin-left: -20px;
    margin-top: -20px;
    position: absolute;
    top: 50%;
    width: 40px;
    z-index: 1;
  }
}

@media (max-width: 767px) {
  .viewer-hide-xs-down {
    display: none;
  }
}

@media (max-width: 991px) {
  .viewer-hide-sm-down {
    display: none;
  }
}

@media (max-width: 1199px) {
  .viewer-hide-md-down {
    display: none;
  }
}