CSS for a simple website

styles.css

/*
  Demo: https://henriquevianna.com/simple/
  Based on https://blog.koley.in/baserock/
*/
@import url('https://fonts.googleapis.com/css?family=Fira+Sans');
body {
  font-family: 'Fira Sans', sans-serif;
  line-height: 1.6;
  color: #222;
  max-width: 40rem;
  padding: 2rem;
  margin: auto;
  background: #fafafa;
}
img {
  max-width: 100%;
}
a {
  color: #04b71b;
  text-decoration: none;
}
h1, h2, strong {
  color: #111;
}
button, input, select, textarea {
  font: inherit;
  padding: .4rem;
}
button, input[type="button"] {
  padding: .2rem .4rem;
}