title: How to apply css only for desktop view in wordpress
body: <p>I working on a website which has vertical navigation menu on left side. now i have to reduce the width of navigation menu but when i reduce width with normal css for desktop view it also affect the mobile view, it also reduce the width in mobile view. 
  So is there any other solution from which the css should apply only for desktop view. it should not affect the mobile view menu header.
  Thanks</p>