Include Modernizr.
Add .no-js to layouts.

Also, lang="en".
Improve header/nav responsiveness via .no-touch class (Modernizr).
Darken blog post image.

For readability. (Suggestion by DJ.)
Change .scroll to .scrollable in stylesheet and markup.

1. Make way for smooth-scroll. 2. More meaningful.
Implement smooth-scroll.
Update URL by default when smooth scrolling.