gnu-social/templates/sidepanel/left/left_stylesheets.html.twig

<link rel='stylesheet' type='text/css' href="{{ asset('assets/css/left/left.css') }}"
      media="screen and (min-width: 1300px)">
<link rel='stylesheet' type='text/css' href="{{ asset('assets/css/left/left_mid.css') }}"
      media="screen and (max-width: 1300px)">
<link rel='stylesheet' type='text/css' href="{{ asset('assets/css/left/left_small.css') }}"
      media="screen and (max-width: 750px)">