seperate functions per file
change button color relative to its hover state
use `$color-dark` on "Google CSE" focus color

"Google CSE" form will be more legible on a browser without focus ring.
fix variable name
rebuild Data URI

All SVG images are optimized and encoded with [SVGO](https://github.com/svg/svgo).
add `$margin-mini` variable
remove "Google AdSense"'s `ins` bottom border

For async AdSense code.
use `class` instead of `id`
use `em` for "Site Navigation" border
indent `pre`
rename `.buttons` to `.social-buttons`
stop outdenting "Read Older"
version 6.38