body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: #ddd;
}

img {
  vertical-align: bottom;
}

h1 {
  color: #666;
  font-size: 3rem;
  text-shadow: 1px 1px #fff;
  text-align: center;
}

.box {
  text-align: center;
}

.imgs {
  background-color: #fff;
  padding: 1em;
  display: inline-block;
}

.img-resp {
  max-width: 100%;
  height: auto;
}