react-image-gallery/styles/image-gallery.css

React carousel image gallery component with thumbnail and mobile support

/**
 * React Image Gallery - Styles
 * 
 * Design System: Base-4 spacing scale
 * Spacing: 2, 4, 8, 12, 16, 20, 24, 32, 48, 64, 80, 96, 120px
 * 
 * CSS Custom Properties for theming:
 * --ig-primary-color: Primary/accent color (default: #337ab7)
 * --ig-white: Icon and text color (default: #fff)
 * --ig-black: Background color in fullscreen (default: #000)
 * --ig-background-overlay: Overlay background (default: rgba(0, 0, 0, 0.4))
 * --ig-thumbnail-size: Thumbnail dimensions (default: 96px)
 * --ig-thumbnail-size-small: Thumbnail size on small screens (default: 80px)
 * --ig-thumbnail-border-width: Thumbnail border width (default: 4px)
 * --ig-thumbnail-border-width-small: Thumbnail border on small screens (default: 3px)
 * --ig-bullet-size: Bullet size (default: 4px)
 * --ig-bullet-size-small: Bullet size on small screens (default: 3px)
 */

:root {
  --ig-primary-color: #337ab7;
  --ig-white: #fff;
  --ig-black: #000;
  --ig-background-overlay: rgba(0, 0, 0, 0.4);
  --ig-thumbnail-size: 96px;
  --ig-thumbnail-size-small: 80px;
  --ig-thumbnail-border-width: 4px;
  --ig-thumbnail-border-width-small: 3px;
  --ig-bullet-size: 4px;
  --ig-bullet-size-small: 3px;
}

/* ==========================================================================
   SVG Icon Styles
   ========================================================================== */

.image-gallery-icon {
  color: var(--ig-white, #fff);
  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(0 2px 2px rgba(0, 0, 0, 0.5));
}

@media (hover: hover) and (pointer: fine) {
  .image-gallery-icon:hover {
    color: var(--ig-primary-color, #337ab7);
  }
  .image-gallery-icon:hover .image-gallery-svg {
    transform: scale(1.1);
  }
}

.image-gallery-icon:focus {
  outline: 2px solid var(--ig-primary-color, #337ab7);
}

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

/* Fullscreen & Play buttons */
.image-gallery-fullscreen-button,
.image-gallery-play-button {
  bottom: 0;
  padding: 20px;
}

.image-gallery-fullscreen-button .image-gallery-svg,
.image-gallery-play-button .image-gallery-svg {
  height: 32px;
  width: 32px;
}

@media (max-width: 768px) {
  .image-gallery-fullscreen-button,
  .image-gallery-play-button {
    padding: 16px;
  }
  .image-gallery-fullscreen-button .image-gallery-svg,
  .image-gallery-play-button .image-gallery-svg {
    height: 24px;
    width: 24px;
  }
}

@media (max-width: 480px) {
  .image-gallery-fullscreen-button,
  .image-gallery-play-button {
    padding: 12px;
  }
  .image-gallery-fullscreen-button .image-gallery-svg,
  .image-gallery-play-button .image-gallery-svg {
    height: 16px;
    width: 16px;
  }
}

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

.image-gallery-play-button {
  left: 0;
}

/* Top & Bottom navigation */
.image-gallery-top-nav,
.image-gallery-bottom-nav {
  padding: 12px;
  left: 50%;
  transform: translateX(-50%);
}

.image-gallery-top-nav .image-gallery-svg,
.image-gallery-bottom-nav .image-gallery-svg {
  height: 120px;
  width: 96px;
}

@media (max-width: 768px) {
  .image-gallery-top-nav .image-gallery-svg,
  .image-gallery-bottom-nav .image-gallery-svg {
    height: 72px;
    width: 48px;
  }
}

@media (max-width: 480px) {
  .image-gallery-top-nav .image-gallery-svg,
  .image-gallery-bottom-nav .image-gallery-svg {
    height: 48px;
    width: 32px;
  }
}

.image-gallery-top-nav[disabled],
.image-gallery-bottom-nav[disabled] {
  cursor: not-allowed;
  opacity: 0.6;
  pointer-events: none;
}

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

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

/* Left & Right navigation */
.image-gallery-left-nav,
.image-gallery-right-nav {
  padding: 48px 12px;
  top: 50%;
  transform: translateY(-50%);
}

.image-gallery-left-nav .image-gallery-svg,
.image-gallery-right-nav .image-gallery-svg {
  height: 120px;
  width: 64px;
}

@media (max-width: 768px) {
  .image-gallery-left-nav .image-gallery-svg,
  .image-gallery-right-nav .image-gallery-svg {
    height: 72px;
    width: 32px;
  }
}

@media (max-width: 480px) {
  .image-gallery-left-nav .image-gallery-svg,
  .image-gallery-right-nav .image-gallery-svg {
    height: 48px;
    width: 24px;
  }
}

.image-gallery-left-nav[disabled],
.image-gallery-right-nav[disabled] {
  cursor: not-allowed;
  opacity: 0.6;
  pointer-events: none;
}

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

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

/* ==========================================================================
   Gallery Container
   ========================================================================== */

.image-gallery {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  /* Prevent mobile overscroll/pull-to-refresh */
  overscroll-behavior: none;
  -webkit-overflow-scrolling: touch;
}

.image-gallery.fullscreen-modal {
  background: var(--ig-black, #000);
  bottom: 0;
  height: 100%;
  left: 0;
  position: fixed;
  right: 0;
  top: 0;
  width: 100%;
  z-index: 5;
}

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

/* ==========================================================================
   Gallery Content
   ========================================================================== */

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

.image-gallery-content.fullscreen {
  background: var(--ig-black, #000);
}

.image-gallery-content .image-gallery-slide .image-gallery-image {
  max-height: calc(100vh - 80px);
}

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

/* ==========================================================================
   Slide Wrapper
   ========================================================================== */

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

.image-gallery-slide-wrapper.image-gallery-thumbnails-left,
.image-gallery-slide-wrapper.image-gallery-thumbnails-right {
  display: inline-block;
  width: calc(100% - 112px);
}

@media (max-width: 768px) {
  .image-gallery-slide-wrapper.image-gallery-thumbnails-left,
  .image-gallery-slide-wrapper.image-gallery-thumbnails-right {
    width: calc(100% - 88px);
  }
}

.image-gallery-slide-wrapper.image-gallery-rtl {
  direction: rtl;
}

.image-gallery-swipe {
  overflow: hidden;
  /* GPU acceleration */
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  touch-action: pan-y pinch-zoom;
}

/* ==========================================================================
   Slides
   ========================================================================== */

.image-gallery-slides {
  overflow: hidden;
  position: relative;
  /* Allow vertical scroll and pinch-zoom; block horizontal pan so JS handles swipe.
     The browser's built-in direction detection prevents vertical scroll during
     horizontal swipes. On desktop, wheel/trackpad scroll passes through normally. */
  touch-action: pan-y pinch-zoom;
  /* GPU acceleration for smooth swiping */
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  contain: layout style paint;
  isolation: isolate;
}

/* Flex container that holds all slides and gets transformed */
.image-gallery-slides-container {
  display: flex;
  /* GPU acceleration for smooth swiping */
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
  will-change: transform;
}

.image-gallery-slides-container.vertical {
  flex-direction: column;
  height: 100%;
}

.image-gallery-slides-container.vertical .image-gallery-slide {
  flex: 0 0 100%;
  height: 100%;
  min-height: 0;
}

.image-gallery-slides-container.vertical
  .image-gallery-slide
  .image-gallery-image {
  height: 100%;
  width: auto;
  max-width: 100%;
}

.image-gallery-slide {
  flex: 0 0 100%;
  min-width: 0;
  position: relative;
  /* GPU acceleration for smooth swiping */
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

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

.image-gallery-slide .image-gallery-description {
  background: var(--ig-background-overlay, rgba(0, 0, 0, 0.4));
  bottom: 72px;
  color: var(--ig-white, #fff);
  left: 0;
  line-height: 1;
  padding: 12px 20px;
  position: absolute;
  white-space: normal;
}

@media (max-width: 768px) {
  .image-gallery-slide .image-gallery-description {
    bottom: 48px;
    font-size: 0.8em;
    padding: 8px 16px;
  }
}

/* ==========================================================================
   Bullets
   ========================================================================== */

.image-gallery-bullets {
  bottom: 20px;
  left: 0;
  margin: 0 auto;
  position: absolute;
  right: 0;
  width: 80%;
  z-index: 4;
  text-align: center;
}

.image-gallery-bullets .image-gallery-bullets-container {
  margin: 0 auto;
  padding: 0;
  display: inline-block;
}

.image-gallery-bullets .image-gallery-bullets-inner {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  white-space: nowrap;
  padding: 2px 0;
}

.image-gallery-bullets .image-gallery-bullet {
  appearance: none;
  background-color: transparent;
  border: 1px solid var(--ig-white, #fff);
  border-radius: 50%;
  box-shadow: 0 2px 2px rgba(0, 0, 0, 0.6);
  cursor: pointer;
  margin: 0 4px;
  outline: none;
  width: calc(var(--ig-bullet-size, 4px) * 2 + 2px);
  height: calc(var(--ig-bullet-size, 4px) * 2 + 2px);
  padding: 0;
  flex-shrink: 0;
  transition: all 0.2s ease-out;
}

@media (max-width: 768px) {
  .image-gallery-bullets .image-gallery-bullet {
    margin: 0 3px;
    width: calc(var(--ig-bullet-size-small, 3px) * 2 + 2px);
    height: calc(var(--ig-bullet-size-small, 3px) * 2 + 2px);
  }
}

@media (max-width: 480px) {
  .image-gallery-bullets .image-gallery-bullet {
    width: 8px;
    height: 8px;
  }
}

.image-gallery-bullets .image-gallery-bullet:focus {
  transform: scale(1.2);
  background: var(--ig-primary-color, #337ab7);
  border: 1px solid var(--ig-primary-color, #337ab7);
}

.image-gallery-bullets .image-gallery-bullet.active {
  transform: scale(1.2);
  border: 1px solid var(--ig-white, #fff);
  background: var(--ig-white, #fff);
}

@media (hover: hover) and (pointer: fine) {
  .image-gallery-bullets .image-gallery-bullet:hover {
    background: var(--ig-primary-color, #337ab7);
    border: 1px solid var(--ig-primary-color, #337ab7);
  }
  .image-gallery-bullets .image-gallery-bullet.active:hover {
    background: var(--ig-primary-color, #337ab7);
  }
}

/* Vertical bullets */
.image-gallery-bullets.image-gallery-bullets-vertical {
  left: 20px;
  right: auto;
  bottom: auto;
  width: auto;
  top: 50%;
  transform: translateY(-50%);
}

.image-gallery-bullets.image-gallery-bullets-vertical
  .image-gallery-bullets-inner {
  flex-direction: column;
  padding: 0 2px;
}

.image-gallery-bullets.image-gallery-bullets-vertical .image-gallery-bullet {
  display: block;
  margin: 4px 0;
}

@media (max-width: 768px) {
  .image-gallery-bullets.image-gallery-bullets-vertical .image-gallery-bullet {
    margin: 3px 0;
  }
}

@media (max-width: 480px) {
  .image-gallery-bullets.image-gallery-bullets-vertical .image-gallery-bullet {
    margin: 3px 0;
  }
}

/* ==========================================================================
   Thumbnails Wrapper
   ========================================================================== */

.image-gallery-thumbnails-wrapper {
  position: relative;
}

.image-gallery-thumbnails-wrapper.thumbnails-swipe-horizontal {
  touch-action: pan-y;
}

.image-gallery-thumbnails-wrapper.thumbnails-swipe-vertical {
  touch-action: pan-x;
}

.image-gallery-thumbnails-wrapper.thumbnails-wrapper-rtl {
  direction: rtl;
}

.image-gallery-thumbnails-wrapper.image-gallery-thumbnails-left,
.image-gallery-thumbnails-wrapper.image-gallery-thumbnails-right {
  display: inline-block;
  vertical-align: top;
  width: var(--ig-thumbnail-size, 96px);
}

@media (max-width: 768px) {
  .image-gallery-thumbnails-wrapper.image-gallery-thumbnails-left,
  .image-gallery-thumbnails-wrapper.image-gallery-thumbnails-right {
    width: var(--ig-thumbnail-size-small, 80px);
  }
}

.image-gallery-thumbnails-wrapper.image-gallery-thumbnails-left
  .image-gallery-thumbnails,
.image-gallery-thumbnails-wrapper.image-gallery-thumbnails-right
  .image-gallery-thumbnails {
  height: 100%;
  width: 100%;
  left: 0;
  padding: 0;
  position: absolute;
  top: 0;
}

.image-gallery-thumbnails-wrapper.image-gallery-thumbnails-left
  .image-gallery-thumbnails
  .image-gallery-thumbnail,
.image-gallery-thumbnails-wrapper.image-gallery-thumbnails-right
  .image-gallery-thumbnails
  .image-gallery-thumbnail {
  display: block;
  margin-right: 0;
  padding: 0;
}

.image-gallery-thumbnails-wrapper.image-gallery-thumbnails-left
  .image-gallery-thumbnails
  .image-gallery-thumbnail
  + .image-gallery-thumbnail,
.image-gallery-thumbnails-wrapper.image-gallery-thumbnails-right
  .image-gallery-thumbnails
  .image-gallery-thumbnail
  + .image-gallery-thumbnail {
  margin-left: 0;
  margin-top: 2px;
}

.image-gallery-thumbnails-wrapper.image-gallery-thumbnails-left,
.image-gallery-thumbnails-wrapper.image-gallery-thumbnails-right {
  margin: 0 4px;
}

@media (max-width: 768px) {
  .image-gallery-thumbnails-wrapper.image-gallery-thumbnails-left,
  .image-gallery-thumbnails-wrapper.image-gallery-thumbnails-right {
    margin: 0 4px;
  }
}

/* ==========================================================================
   Thumbnails
   ========================================================================== */

.image-gallery-thumbnails {
  overflow: hidden;
  padding: 4px 0;
}

@media (max-width: 768px) {
  .image-gallery-thumbnails {
    padding: 4px 0;
  }
}

.image-gallery-thumbnails .image-gallery-thumbnails-container {
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
}

.image-gallery-thumbnail {
  display: inline-block;
  border: var(--ig-thumbnail-border-width, 4px) solid transparent;
  transition: border 0.3s ease-out;
  width: var(--ig-thumbnail-size, 96px);
  background: transparent;
  padding: 0;
}

@media (max-width: 768px) {
  .image-gallery-thumbnail {
    border: var(--ig-thumbnail-border-width-small, 3px) solid transparent;
    width: var(--ig-thumbnail-size-small, 80px);
  }
}

.image-gallery-thumbnail + .image-gallery-thumbnail {
  margin-left: 2px;
}

.image-gallery-thumbnail .image-gallery-thumbnail-inner {
  display: block;
  position: relative;
}

.image-gallery-thumbnail .image-gallery-thumbnail-image {
  vertical-align: middle;
  width: 100%;
  line-height: 0;
}

.image-gallery-thumbnail.active,
.image-gallery-thumbnail:focus {
  outline: none;
  border: var(--ig-thumbnail-border-width, 4px) solid
    var(--ig-primary-color, #337ab7);
}

@media (max-width: 768px) {
  .image-gallery-thumbnail.active,
  .image-gallery-thumbnail:focus {
    border: var(--ig-thumbnail-border-width-small, 3px) solid
      var(--ig-primary-color, #337ab7);
  }
}

@media (hover: hover) and (pointer: fine) {
  .image-gallery-thumbnail:hover {
    outline: none;
    border: var(--ig-thumbnail-border-width, 4px) solid
      var(--ig-primary-color, #337ab7);
  }
}

@media (hover: hover) and (pointer: fine) and (max-width: 768px) {
  .image-gallery-thumbnail:hover {
    border: var(--ig-thumbnail-border-width-small, 3px) solid
      var(--ig-primary-color, #337ab7);
  }
}

/* ==========================================================================
   Thumbnail Label
   ========================================================================== */

.image-gallery-thumbnail-label {
  box-sizing: border-box;
  color: var(--ig-white, #fff);
  font-size: 1em;
  left: 0;
  line-height: 1em;
  padding: 5%;
  position: absolute;
  top: 50%;
  text-shadow: 0 2px 2px rgba(0, 0, 0, 0.6);
  transform: translateY(-50%);
  white-space: normal;
  width: 100%;
}

@media (max-width: 768px) {
  .image-gallery-thumbnail-label {
    font-size: 0.8em;
    line-height: 0.8em;
  }
}

/* ==========================================================================
   Index Display
   ========================================================================== */

.image-gallery-index {
  background: var(--ig-background-overlay, rgba(0, 0, 0, 0.4));
  color: var(--ig-white, #fff);
  line-height: 1;
  padding: 10px 20px;
  position: absolute;
  right: 0;
  top: 0;
  z-index: 4;
}

@media (max-width: 768px) {
  .image-gallery-index {
    font-size: 0.8em;
    padding: 5px 10px;
  }
}