.somier{background: url(../images/sommier/sommier.jpg) no-repeat bottom right; height: 300px;} @media only screen and (max-width:995px){.somier{background: url(../images/sommier/768/sommier.jpg) no-repeat bottom right; height: 247px;} } @media only screen and (max-width:767px){.somier{background: url(../images/sommier/420/sommier.jpg) no-repeat bottom right; height: 132px;} } @media only screen and (max-width:479px){.somier{background: url(../images/sommier/300/sommier.jpg) no-repeat bottom right; height: 95px;} }