.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 1rem;
  text-align: center;
  background-color: #fff;
  border-radius: 0.5em;
}

header > h1 {
  margin-top: 0;
  font-family: 'Catamaran', sans-serif;
  font-size: 2.5rem;
  border-bottom: 1px solid #eee;
}

.gallery {
  display: grid;
  margin: 3em 0;
  grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
  grid-template-rows: 1fr;
  grid-gap: 1em;
  grid-auto-flow: dense;
}

figure {
  display: flex;
  margin: 0;
}

img {
  flex: 1;
  max-width: 100%;
  -o-object-fit: cover;
     object-fit: cover;
}