force landscape mode css
// ID/class based landscape mode on/off
#container { display:block; }
@media only screen and (orientation:portrait){
#container {
height: 100vw;
-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-o-transform: rotate(90deg);
-ms-transform: rotate(90deg);
transform: rotate(90deg);
}
}
@media only screen and (orientation:landscape){
#container {
-webkit-transform: rotate(0deg);
-moz-transform: rotate(0deg);
-o-transform: rotate(0deg);
-ms-transform: rotate(0deg);
transform: rotate(0deg);
}
}