img {
    max-width: 100%;
    height: auto;
    transform-origin: top left;
  }
  
  .gallery {
    /* https://tobiasahlin.com/blog/masonry-with-css/ */
    display: flex;
    flex-flow: column wrap;
    align-content: space-between;
    overflow: hidden;
    flex-direction: row-reverse;
    /*height: 133vw;*/
    /* Re-order items into rows */
    /* Force new columns */
  }
  .gallery .gallery-image {
    width: 33.3%;
  }
  .gallery .gallery-image[data-flipping] {
    opacity: 1;
    z-index: 3;
  }
  .gallery .gallery-image:nth-child(3n+1) {
    order: 1;
  }
  .gallery .gallery-image:nth-child(3n+2) {
    order: 2;
  }
  .gallery .gallery-image:nth-child(3n) {
    order: 3;
  }
  /*.gallery::before, .gallery::after {
    content: "";
    flex-basis: 100%;
    width: 0;
    order: 2;
  }*/
  
  .gallery-image {
    margin: 0;
    display: block;
    position: relative;
  }
  .gallery-image img {
    display: block;
    width: 100%;
  }
  /*.gallery-image figcaption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    color: #FFF;
    text-shadow: 0 0 1px #000;
    opacity: 0.8;
    padding: 1em;
    text-align: left;
    transition: opacity 0.4s linear;
    font-family: monospace;
  }
  .gallery-image:hover figcaption {
    opacity: 1;
  }*/
  
  .detail {
    z-index: 999;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(25, 25, 25, 0);
    /*box-shadow: 0 0 30px #000;*/
    display: flex;
    pointer-events: none;
    transition: background 0.3s linear;
  }
  .detail .gallery-image {
    padding: 1vmin;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .detail .gallery-image img {
    width: auto;
    height: auto;
    max-width: 100%;
    max-height: 100%;
  }
  /*.detail .gallery-image figcaption {
    display: none;
  }*/
  
  [data-state=detail] .detail {
    background: rgba(25, 25, 25, 0.85);
    pointer-events: auto;
  }
  [data-state=detail] .detail .gallery-image {
    opacity: 1;
  }
  
  [data-state=gallery] .detail .gallery-image {
    opacity: 0;
    transition: none;
  }
  
  /* ---------------------------------- */ 
  #app {
    pointer-events: none;
  }
  #app .gallery .gallery-image {
    pointer-events: auto;
    cursor: pointer;
    padding: 2px;
  }
  
  .gallery-image {
    transition: opacity 0.5s linear;
  }
  
  #app:hover .gallery .gallery-image {
    /*opacity: 0.3;*/
  }
  #app:hover .gallery .gallery-image[data-flipping],
  #app:hover .gallery .gallery-image:hover {
    opacity: 1;
    transition-duration: 0.3s;
  }

  @media (max-width: 991.98px) {
    /*.gallery {
      height: 231vw;
    }*/
    .gallery .gallery-image {
      width: 50%;
    }
}