How to detect the device orientation using CSS media queries?

In JavaScript the orientation mode can be detected using:

if (window.innerHeight > window.innerWidth) {
    portrait = true;
} else {
    portrait = false;
}

However, is there a way to detect the orientation using CSS only?

Eg. something like:

@media only screen and (width > height) { ... }

Solution 1:

CSS to detect screen orientation:

 @media screen and (orientation:portrait) { … }
 @media screen and (orientation:landscape) { … }

The CSS definition of a media query is at http://www.w3.org/TR/css3-mediaqueries/#orientation

Solution 2:

@media all and (orientation:portrait) {
/* Style adjustments for portrait mode goes here */
}

@media all and (orientation:landscape) {
  /* Style adjustments for landscape mode goes here */
}

but it still looks like you have to experiment