body {
  font-family: Verdana, Arial, sans-serif;
  font-size: 14px;
  background-color: white;
}

h1 {
  color: red;
  font-size: 1.4rem;
  text-align: center;
}

h2 {
  color: grey;
  font-size: 1.2rem;
  text-align: center;
}

h3 {
  color: blue;
  font-size: 1.5rem;
  text-align: center;
}

#tete {
  text-align: center;
}

nav {
  float: left;
  display: inline-block;
  min-width: 150px;
  max-width: 300px;
  min-height: 500px;
  border: 3px black solid;
  padding: 5px;
  overflow: auto;
  margin: 20px;
  text-align: left;
  vertical-align: top;
  background-color: white;
}

section {
  width: 540px;
  display: inline-block;
  min-height: 500px;
  max-height: 700px;
  border: 3px navy solid;
  padding: 5px;
  overflow: auto;
  margin: 20px;
  text-align: left;
  vertical-align: top;
  background-color: white;
}

a {
  color: #139;
  text-decoration: none;
  text-align: left;
}

a:hover {
  color: #D41;
  text-decoration: none;
}

section a:visited {
  color: #049701;
  text-decoration: none;
}