body {
  background: #fff;
  color: #000;
  margin: 0 10%;
  font-family: Tahoma, Arial, Helvetica, sans-serif;
  font-size: 62.5%;
}

h1 {
  margin-top: 0;
  font-size: 2.0em;
  line-height: 0.9em;
}
h2 { font-size: 1.7em; }

.subtitulo { 
  font-size: 0.7em;
  margin-top: 0;
}