@charset "UTF-8";#container {    width: 100%;    max-width: 1200px;    margin-left: auto;    margin-right: auto;    color: hsla(0,0%,100%,1.00);    background-color: hsla(0,0%,0%,1.00);    display: block;    background-image: url(url);    text-align: center;}#container #titre h1 {    color: hsla(216,68%,53%,1.00);    font-size: 2.5vw;    font-weight: 700;}#nav ul li {	display: inline;	color: #FFFFFF;	text-align: center;	line-height: 1.8em;}ul li a {    margin-left: 15px;    margin-right: 15px;    text-decoration: none;    color: #FFFFFF;	font-style: 2.5vw;}a:hover {	background-color: #3476D9;}#nav ul .en_cours {	background-color: #3476D9;}#container hr {	height: 2px;	background-color: #3476D9;}#container #principal {    margin-left: 5px;    width: 100%;    font-size: 2.5vw;}#container #pied {    clear: left;    padding-top: 26px;}#container #pied h2 {    color: #3476D9;    text-align: center;    font-size: 2.2vw;    font-weight: 700;}#container #principal p {    font-size: 1.8vw;    color: #FFFFFF;    font-weight: 500;}