.gris {
font-family:Arial, Helvetica, sans-serif;
font-size:1em;
background-color:#EDEDED;
padding:1em 1em .3em 1em;
}

#mainContent img {
padding-top:1em;
padding-bottom:1em;
width:98%;
}

.marg {
margin-top:1em;
margin-bottom:1em;
}