sevenforums 98% width

i made a userstyle where sevenforums is not 1000px wide.

sevenforums 98% width - Themes and Skins for Sevenforums - userstyles.org

I fail to see what the userstyle does.

Sevenforums renders fine on my Blackberry cure (despite the promps to use the crummy mobile app), so I can't see how this is useful.