You can use media query in your CSS in order to load the appropriate file accordingly to the device orientation.
In order to do this you can create a main.css file for your mobile web page and the use inside it media query combined with the import directive.
This sinppet is particulary tailored of iOS devices
In order to do this you can create a main.css file for your mobile web page and the use inside it media query combined with the import directive.
This sinppet is particulary tailored of iOS devices
@import url("portrait.css") all and (orientation:portrait);
@import url("landscape.css") all and (orientation:landscape);

