body {font-family: Verdana, Arial, sans-serif;font-size:12px;}
div {margin:0 0 10px 0; padding:0;}
h1 {font-size:16px; margin:0 0 10px 0;}
h2 {font-size:14px; margin:0 0 10px 0;}
p {margin:0 0 10px 0;}
a {text-decoration:none;}

div#c1 {float:left;width:50%}
div#c2 {float:right;width:50%}

div#nautisme , div#genealogie , div#immobilier {border: 1px solid #999;background-color:#ccd;padding:10px;margin:10px;}
div#immobilier {background-color:#ddc;}
div#genealogie {background-color:#cdc;}