for your issue with wanting to swap stylesheets when the user clicks (mobile | standard) or whatever, try doing all your media queries in the stylesheet <link>

for your issue with wanting to swap stylesheets when the user clicks (mobile | standard) or whatever, try doing all your media queries in the stylesheet <link> tags themselves, then using javascript to unset all the media="" parts, or change them so that the correct stylesheet applies, rather than faking browser width that might fuck around with other JS functions