/* MOSAIC */

.mosaic {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  width: 100%;
}

.mosaic-item {
  flex-shrink: 0;
  background-color: var(--text-color);
  position: relative;
}

.mosaic-item--col-1 { width: 25%; }
.mosaic-item--col-2 { width: 50%; }
.mosaic-item--col-3 { width: 75%; }
.mosaic-item--col-4 { width: 100%; }

.mosaic-item picture {
  display: block;
  width: 100%;
}

.mosaic-media {
  display: block;
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  overflow: hidden;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.mosaic-media.is-loaded {
  opacity: 1;
}

.mosaic-caption {
  margin: 0;
  padding: 0.4em 0 0.4em 0.3em;
  font-size: 0.75em;
  color: var(--text-color);
  line-height: 1.3;
  background: var(--bg-color);
}

/* Mobile: two columns */
@media (max-width: 768px) {
  .mosaic {
    padding-top: var(--navbar-height);
    padding-bottom: calc(var(--navbar-x-mobile) + var(--navbar-item-y-mobile) * 2 + 1em + 10px);
  }
  .mosaic-item--col-1,
  .mosaic-item--col-2 { width: 50%; }

  .mosaic-item--col-3,
  .mosaic-item--col-4 { width: 100%; }

  .mosaic-item--mobile-half { width: 50%; }
  .mosaic-item--mobile-full { width: 100%; }

  .mosaic-caption { font-size: 0.6em; }
}