* {margin:0; padding:0;}
body
{
text-align:center; /* dla wysrodkowania układu w IE6 */
font-family:lucida, arial, sans-serif;
}

/* Smartphones (portrait and landscape) ----------- */
@media only screen and (min-device-width : 320px) and (max-device-width : 480px) {
#main
{width:320px;
height:200px;
background:green;
}
}
/* Smartphones (landscape) ----------- */
@media only screen and (min-width : 321px) {
#main{
width:400px;
height:200px;
background:green;
}
}
/* Smartphones (portrait) ----------- */
@media only screen and (max-width : 320px) {
#main
{
width:320px;
height:200px;
background:#131313;
}
}
/* iPads (portrait and landscape) ----------- */
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) {
#main
{
width:320px;
height:200px;
background:#aac;
}
}
/* iPads (landscape) ----------- */
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : landscape) {
#main
{
width:320px;
height:200px;
background:#aac;
}
}
/* iPads (portrait) ----------- */
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : portrait) {
#main
{
width:320px;
height:200px;
background:#aac;
}
}
/* Desktops and laptops ----------- */
@media only screen and (min-width : 1224px) {
#main
{
width:320px;
height:200px;
background:yellow;
}
}