body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
}

header {
  background-color: #f2f2f2;
  padding: 20px;
}

h1 {
  margin: 0;
}

main {
  padding: 20px;
}

footer {
  background-color: #f2f2f2;
  padding: 10px;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
}
/* styles pour le menu nav */
nav {
  background-color: #f2f2f2;
  padding: 10px;
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

nav ul li {
  display: inline-block;
  margin-right: 10px;
}

nav ul li a {
  display: block;
  padding: 8px;
  text-decoration: none;
  color: #000;
  font-weight: bold;
}

nav ul li a:hover {
  background-color: #ccc;
}