body {
  background-color: rgba(115,130,140,0.4);
  font: 1.1em Arial, Helvetica, sans-serif;
}

img {
  max-width: 100%;
  display: block;
}

figure {
  margin: 0;
  display: grid;
  grid-template-rows: 1fr auto;
  margin-bottom: 10px;
  break-inside: avoid;
}

figure > img {
  grid-row: 1 / -1;
  grid-column: 1;
}

figure a {
  color: black;
  text-decoration: none;
}

figcaption {
  grid-row: 2;
  grid-column: 1;
  background-color: rgba(255,255,255,.5);
  padding: .2em .5em;
  justify-self: start;
}

.container-photos {
  column-count: 4;
  column-gap: 10px;
}

/* Portrait: */
@media (max-aspect-ratio: 1 / 1) {
    .container-photos {
	column-count: 2;
    }
}

/* narrow screens: */
@media (min-width: 480px) {
    .container-photos {
	column-count: 2;
    }
}

@media (min-width: 960px) {
    .container-photos {
	column-count: 4;
    }
}