Boilerplate CSS.

boilerplate.css

*,
*:before,
*:after {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

html,
body {
  height: 100%;
}

html {
  font-size: 62.5%;
}

body {
  font: 300 1.8rem/1.6875 sans-serif;
}

h1,
h2,
h3,
h4,
h5,
h6,
ul,
ol,
blockquote,
p {
  margin: 0 0 2rem 0;
}

ul,
ol {
  padding-left: 4rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 300;
}

h1 {
  font-size: 3.6rem;
}

h2 {
  font-size: 3.2rem;
}

h3 {
  font-size: 2.6rem;
}

h4 {
  font-size: 2.4rem;
}

img {
  display: block;
  width: 100%;

  margin: 0 auto 2rem auto;
}