Yes. According to the MDN docs:
orientation
Value: landscape | portrait
Media: visual
Accepts min/max prefixes: no
Indicates whether the viewport is in landscape (the display is wider
than it is tall) or portrait (the display is taller than it is wide)
mode.
Example
To apply a style sheet only in portrait orientation:
@media all and (orientation: portrait) { ... }
Note: This value does
not correspond to actual device orientation. Opening the soft keyboard
on most devices in portrait orientation will cause the viewport to
become wider than it is tall, thereby causing the browser to use
landscape styles instead of portrait.