body {
  margin: 0;
  padding: 0;
}

section {
  font-size: 3rem;
  position: relative;
  height: 100vh;
}
section h1 {
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
}

section:nth-child(odd) {
  color: white;
  background-color: #b61924;
}