I downloaded HTML5 Boilerplate today to use on a new project. In the CSS it has a section titled “Media queries”, I assume encouraging developers to put all their media queries here.
All media queries in one place?! I think it makes sense to put the media queries as close as possible to the rest of the styles. I don’t want to go hunting somewhere else for a media query about the navbar, keep it next to the styles for the navbar, surely? That way you’re keeping all relevant styles close together.