Dreamwidth style system discussion

Hi everyone! I hope this is the right place to ask the questions -

How do I make my comment pages appear in light style like LJ? I remember in LJ I can choose whether or not all my comment pages appear in light style... But here on DW I haven't been able to find that.

Also, is there any way I can customize the light style, I don't like the font DW is using, I think sans serif fonts are better for reading on screen. With DW's serif font it's really difficult to read.

Thank you in advance! :)