body, html {
  margin: 0;
  padding: 0;
}

.thumbnail-gallery {
  font: 0/0 a;
  max-width: 1400px;
  margin: 0 auto 5vh;
}

.thumbnail-gallery > div {
  display: inline-block;
  width: 25%;
}

.thumbnail-gallery img {
  max-width: 100%;
}