There's only one HTML change:
Replacing:
<meta name="viewport" content="width=500, minimum-scale=0.45" />
...with:
<meta name="viewport" content="width=device-width, initial-scale=1">
The rest of the changes are all in fireball_screen.css
Given the high amount of edits it's probably easiest to just do a full copy and paste rather than cherry picking each change