body {
  background-color: black;
  color: white;
  text-align: center;
}
h2{
	border-style: ridge;
	border-color: purple;
	border-width: 7px;
	color: white;
}
h1{
	color: white;
}

ul {
  /*width: 1200px;*/
  padding: 10px;
  border: 5px solid purple;
  margin: 0;
}

img {
	width : auto;
	height : 300px;
}

/* barre de navigation */

.nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: black;
}

.nav li {
  float: left;
}

.nav li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.nav li a:hover:not(.active) {
  background-color: purple;
}

.nav .active {
  background-color:purple ;
}
.center {
  margin: auto;
  width: 50%;
  border: 3px solid green;
  padding: 10px;
}
a {
	color: pink;
}