body {
  background-color: #000;
  background-image: url('/img/welly-tile.jpg');
  background-size: auto;
  background-position: center bottom;
}

.grid {
  margin: 10px auto;
}

.grid-item {
  max-width: 500px;
  margin: 10px;
}

.grid-item img {
  width: 100%;
  height: auto;
  border-radius: 10px;
}