Simple minimalist css to start with when building a web page

start-with-this.css

body {
  margin: 40px auto;
  padding: 0 20px;
  max-width: 650px;
  color: #444444;
  background-color: #f2f2f2;
  line-height: 1.6;
  font-size: 16px;
  font-family: sans-serif;
}
h1,h2,h3 {
  line-height: 1.3
}
/* this gives more spacing between the text and the underline */
a {
  border-bottom: 1px solid #444444;
  color: #444444;
  text-decoration: none;
  -webkit-transition: all 0.2s;
  -moz-transition: all 0.2s;
  -o-transition: all 0.2s;
  transition: all 0.2s;
}
a:hover {
  color: #2196F3;
  border-bottom: 1px solid rgba(68,68,68,0);
}