demo.css

* {
	box-sizing: border-box;
	outline: 0;
	text-decoration: none;
	word-wrap: break-word;
}
html {
	font-size: 100%;
	line-height: 1.5;
}
body {
  margin: 0;
  padding: 0;
	overflow-x: hidden;
}
section {
  color: #FFF;
  text-align: center;
  background-color: #358CA7;
  width: 100%;
  margin-bottom: 0.5rem;
}
.main {
  display: flex;
  flex-flow: column;
  align-items: center;
  width: 100%;
  padding: 1rem;
  background: #f5f5f5;
}
.showcase {
  flex: 1 1 auto;
  justify-content: center;
  padding: 0.75rem;
}