gallery/style/gallery.css

@import url(base.css);

body {
  max-width: 50em;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, var(--image-size));
  grid-gap: 1.5em;
  justify-content: center;
  justify-items: center;
  align-items: start;

  --image-size: 200px;
  --border-thickness: 2px;
  padding: 0;
  margin: 0;
}

.item {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
  width: var(--image-size);
  height: var(--image-size);
  box-shadow: 0 0 10px var(--shadow);
  border: 2px solid var(--text);
  overflow: hidden;
}

figure {
  margin: 0;
  padding: 0;
}

.item figcaption {
  width: calc(100% - 2 * var(--border-thickness));
  margin: 0;
  padding: var(--border-thickness);

  position: absolute;
  left: 0;
  bottom: 0;

  font-size: 80%;
  text-align: center;

  background: hsl(0, 0%, 100%, 75%);
  text-shadow:
    -1px -1px 1px white,
     1px -1px 1px white,
    -1px  1px 1px white,
     1px  1px 1px white;
  border-top: 2px solid var(--text);
}


@media (hover) {
  .item:hover figcaption {
    opacity: 20%;
  }

  @media (prefers-reduced-motion) {
    .item:hover figcaption {
      transform: translateY(80%);
    }
  }

  @media (prefers-reduced-motion: no-preference) {
    .item:hover img {
      filter: contrast(120%);
    }

    .item:hover figcaption {
      transform: translate(-20%, 80%) rotateZ(7deg);
    }

    .item * {
      transition: all 0.2s ease-in-out;
    }
  }
}

@media (hover: none) {
  .item a {
    display: block;
    margin: 0;
    height: var(--image-size);
  }

  .item img {
    margin-bottom: 0;
  }

  .item figcaption {
    position: static;
    background: hsl(0, 0%, 100%, 50%);
  }

  .item {
    height: auto;
  }
}