body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #fefefe;
  color: #333;
}
header {
  background: #eeeeee;
  padding: 20px;
  text-align: center;
}
main {
  padding: 20px;
  max-width: 800px;
  margin: auto;
}
h1, h2 {
  color: #1a1a1a;
}
a.botao {
  display: inline-block;
  margin-top: 25px;
  background: #1976d2;
  color: #fff;
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 5px;
}
footer {
  margin-top: 40px;
  text-align: center;
  font-size: 0.9em;
  color: #888;
  padding: 20px;
  background: #fafafa;
}