html, body {
  margin: 0; padding: 0;
  width: 100vw;
  height: 100vh;
  background: black;
  text-align: center;
}

#c {
  display: block;
  background: #533;
  margin: auto;
  height: calc(100% - 100px);
}

.content {
	height: 100vh;
}

p {
	color: white;
}