We will take a brief tangent at this point to consider some of the different approaches that authors can take when writing and organizing their media queries. Each approach offers some benefits and some tradeoffs so it's worth at least knowing about these factors, even if you decide they are largely irrelevant for your needs.
From a browser perspective, CSS is considered to be a 'render blocking' asset. The browser needs to fetch and parse a linked CSS file before rendering of the page can complete.
However, modern browsers are smart enough to discern which style sheets (linked with media queries in the head) need to be analyzed immediately and which can be deferred until after the initial page rendering.
For these browsers, CSS files linked to with non-applicable media queries (for example if the screen is too small for the media query to apply) can be 'deferred' until after the initial...