Page
Used to strucutre your page layout into sidebar and main content.
Usage
Use .o-page to strucutre your page layout into sidebar and main content.
Don’t forget to add .js-page-sidebar class for hiding / showing sidebar based
on the current screen size.

<body class="o-page">
<!-- Notice `.js-page-sidebar` used for toggling sidebar via javascript -->
<aside class="o-page__sidebar js-page-sidebar"></aside>
<main class="o-page__content"></main>
</body>