css - How do I combine two media queries?

Question

How do I combine two media queries? One is for smaller devices and one for bigger devices, but only in portrait mode!

 @media only screen 
and (min-device-width : 320px) 
and (max-device-width : 480px) 
and (orientation : landscape){
#div {margin-top: 20px;}
}

}
@media only screen 
and (min-device-width : 481px) 
and (max-device-width : 1024px) 
and (orientation : portrait){
{margin-top: 20px;}
}

Answer 1

Not fully clear what you want to combine, but basically you separate them with a comma

eg

@media only screen and (orientation : landscape) , only screen and (min-device-width : 481px) and (orientation : portrait) { ...