Snippets/Tablets and Smartphones in Desktop mode

There exist a Wikipedia App on Android. However it does not allow for all functions like they are available in desktop mode.

Therefore a user might like to use desktop mode, even on a tablet or a smartphone. But this has some GUI inconvenients, e.g, the characters are too small, and menus are too close to other GUI objects.

Description
This small CSS code allows to use desktop mode on a tablet or a smartphone without having the difficulty that the address-bar is opened when trying to access the top Wiki page user menu.

Usage
It should work for all types and versions of MediaWiki and all browsers.
 * Copy the below code to your Special:MyPage/common.css.
 * You can activate it centrally for all the sister projects on m:Special:MyPage/global.css

Code
Allow a somewhat larger margin-top to avoid touching the address bar when accessing the user menu.

Known problems
It takes action for all kinds of browsers. It would have been better if it would be only active for e.g. Chrome on a tablet or a smartphone. But it seems not possible (or difficult) to distinguish amongst browsers in a CSS?