Update main.css

Hi Ben
I hope you're well.
I thought we could lose a little of the size and weight of the h2s and h3s - main point was to get the main heading on one line... only thing we might need to still do is make the 'and' an '&' ie
Makers of Traditional Sofas, Chairs & Armchairs
Fastidiously Handmade in England Since 1987
Only other change was to make the text colour the same as the olive green used in the footer... not SEO but might make the site a tad prettier!
Kind regards
G