$ig-small-screen: 768px !default;
$ig-xsmall-screen: 480px !default;
$ig-white: #fff !default;
$ig-black: #000 !default;
$ig-blue: #337ab7 !default;
$ig-background-black: rgba(0, 0, 0, 0.4) !default;
$ig-transparent: rgba(0, 0, 0, 0) !default;
$ig-shadow: 0 2px 2px lighten($ig-black, 10%);

@mixin vendor-prefix($name, $value) {
  @each $vendor in ('-webkit-', '-moz-', '-ms-', '-o-', '') {
    #{$vendor}#{$name}: #{$value};
  }
}

// SVG ICON STYLES
.image-gallery-icon {
  color: $ig-white;
  transition: all 0.3s ease-out;
  appearance: none;
  background-color: transparent;
  border: 0;
  cursor: pointer;
  outline: none;
  position: absolute;
  z-index: 4;
  filter: drop-shadow($ig-shadow);

  @media (hover: hover) and (pointer: fine) {
    &:hover {
      color: $ig-blue;

      .image-gallery-svg {
        transform: scale(1.1);
      }
    }
  }

  &:focus {
    // a11y support
    outline: 2px solid $ig-blue;
  }
}

.image-gallery-using-mouse {
  .image-gallery-icon {
    &:focus {
      outline: none;
    }
  }
}

.image-gallery-fullscreen-button {
  bottom: 0;
  padding: 20px;

  .image-gallery-svg {
    height: 28px;
    width: 28px;
  }

  @media (max-width: $ig-small-screen) {
    padding: 15px;

    .image-gallery-svg {
      height: 24px;
      width: 24px;
    }
  }

  @media (max-width: $ig-xsmall-screen) {
    padding: 10px;

    .image-gallery-svg {
      height: 16px;
      width: 16px;
    }
  }
}

.image-gallery-fullscreen-button {
  right: 0;
}

.image-gallery-left-nav,
.image-gallery-right-nav {
  padding: 50px 10px;
  top: 50%;
  transform: translateY(-50%);

  .image-gallery-svg {
    height: 120px;
    width: 60px;
  }

  @media (max-width: $ig-small-screen) {
    .image-gallery-svg {
      height: 72px;
      width: 36px;
    }
  }

  @media (max-width: $ig-xsmall-screen) {
    .image-gallery-svg {
      height: 48px;
      width: 24px;
    }
  }

  &[disabled] {
    cursor: disabled;
    opacity: 0.6;
    pointer-events: none;
  }
}

.image-gallery-left-nav {
  left: 0;
}

.image-gallery-right-nav {
  right: 0;
}
// End of Icon styles

.image-gallery {
  @include vendor-prefix('user-select', none);
  -webkit-tap-highlight-color: $ig-transparent;
  position: relative;

  &.fullscreen-modal {
    background: $ig-black;
    bottom: 0;
    height: 100%;
    left: 0;
    position: fixed;
    right: 0;
    top: 0;
    width: 100%;
    z-index: 5;

    .image-gallery-content {
      top: 50%;
      transform: translateY(-50%);
    }
  }
}

.image-gallery-content {
  position: relative;
  line-height: 0;
  top: 0;

  &.fullscreen {
    background: $ig-black;

    .image-gallery-slide .image-gallery-image {
      max-width: 100%;
    }
  }

  .image-gallery-slide .image-gallery-image {
    max-height: calc(100vh - 80px); // 80 px for the thumbnail space
    max-width: unset;
    object-fit: contain;
  }

  &.left,
  &.right,
  &.image-gallery-thumbnails-left,
  &.image-gallery-thumbnails-right {
    .image-gallery-slide .image-gallery-image {
      max-height: 100vh;
    }
  }
}

.image-gallery-slide-wrapper {
  position: relative;

  &.left,
  &.right,
  &.image-gallery-thumbnails-left,
  &.image-gallery-thumbnails-right {
    display: inline-block;
    width: calc(100% - 110px); // 100px + 10px for margin

    @media (max-width: $ig-small-screen) {
      width: calc(100% - 87px); // 81px + 6px for margin
    }
  }

  &.image-gallery-rtl {
    direction: rtl;
  }
}

.image-gallery-slides {
  line-height: 0;
  overflow: hidden;
  position: relative;
  white-space: nowrap;
  text-align: center;
}

.image-gallery-slide {
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;

  &.center,
  &.image-gallery-center {
    position: relative;
  }

  .image-gallery-image {
    width: 100%;
    object-fit: contain;
  }
}

.image-gallery-index {
  background: $ig-background-black;
  color: $ig-white;
  line-height: 1;
  padding: 10px 20px;
  position: absolute;
  right: 0;
  top: 0;
  z-index: 4;

  @media (max-width: $ig-small-screen) {
    font-size: 0.8em;
    padding: 5px 10px;
  }
}