div.explications, div#header, div.variantes, div.breakimg, div.etirement, div.depassement, div.liste_bloc {
width:98%;
}

div.left_column {width:33%}

div.article_box {
margin:0px 2% 10px 2%;
width:23%;
}

.header {height:110px}

body h1.a_la_une {margin-left:45px;}