body {
	background-color: #eee;
  height: 100vh;
  line-height: 150%;
}

body {
	background-color: #eee;
  height: 100vh;
  line-height: 150%;
  box-sizing: border-box;
}

*, :after, :before {
  box-sizing: inherit;
}

Add box-sizing for all elements
Add box-sizing for all elements
