cube-gallery-custom-elements/cube.css at master · Danjohnsonnj/cube-gallery-custom-elements · GitHub

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.gallery {
  /* Set these from the properties on the `flip-gallery` */
  --gallery-color: #121212;
  --caption-bg-color: #4d4d4d;
  --caption-text-color: #b8b8b8;
}

/* Some day CSS4 color functions will be in browsers, and we can
    just use the `gallery-color` attribute on the `flip-gallery` */
@supports (color: color(var(--gallery-color) contrast(45%))) {
  .gallery {
    --caption-bg-color: color(var(--gallery-color) lightness(30%));
    --caption-text-color: color(var(--gallery-color) contrast(45%));
  }
}


.gallery {
  --item-width: 800px;
  --item-height: 600px;
  --trans-duration: 1s;
  --trans-duration-mod: 0.7s;
  --trans-curve: cubic-bezier(0.65, -0.25, 0.35, 1.25);
}

.gallery,
.gallery * {
  box-sizing: border-box;
}

.gallery {
  min-height: 100vh;
  background: var(--gallery-color);
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-evenly;
  align-items: center;
  font: 20px/2em sans-serif;

}

.gallery-item {
  flex-basis: var(--item-width);
  margin-bottom: calc(0.1 * var(--item-height));
  background-color: transparent;
}

.gallery figure {
  width: var(--item-width);
  height: var(--item-height);
  position: relative;
  transition-property: transform;
  transition-duration: var(--trans-duration);
  transition-timing-function: var(--trans-curve);
}

.gallery figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50%;
  backface-visibility: hidden;
  transition-property: filter;
  transition-duration: var(--trans-duration-mod);
  transition-timing-function: var(--trans-curve);
  filter: brightness(1);
}

.gallery figcaption {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--caption-bg-color);
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  text-align: center;
  border: 20px solid transparent;
}

.gallery figcaption > * {
  display: block;
  color: var(--caption-text-color);
}

@media screen and (max-width: 600px) {
  .gallery {
    font-size: 12px;
  }
}


/*    3-D stuff */
.gallery .gallery-item {
  perspective: var(--item-width);
}

.gallery figure {
  z-index: -1;
  transform-style: preserve-3d;
  transform: translateZ(calc(-0.5 * var(--item-height)));
}

.gallery img {
  transform: rotateY(0deg) translateZ(calc(0.5 * var(--item-height)));
}

.gallery figcaption {
  backface-visibility: hidden;
  transform: rotateX(90deg) translateZ(calc(0.5 * var(--item-height)));
}

.gallery .gallery-item:hover figure,
.gallery .gallery-item.show-caption figure {
  z-index: 2;
  transform: translateZ(calc(-0.5 * var(--item-height))) rotateX(-90deg);
}
.gallery .gallery-item:hover img,
.gallery .gallery-item.show-caption img {
  filter: brightness(0.2);
}