.box {
  margin: 10vh auto;
  padding: 2rem 4rem;
  background-color: hsl(210, 83%, 75%); /* blue */
}

@media (min-width: 720px) {
  .box {
	background-color: hsl(34, 90%, 65%); /* orange */
  }
}

@media (min-width: 960px) {
  .box {
	background-color: hsl(107, 80%, 70%); /* green */
  }
}