I think that might work. Thank you.
My goal was to change the base font size that would cause the children to properly scale without actually changing the child measurements within the CSS code. I think Ralph's suggestion will accomplish this.
I actually did go for pixel-perfection using em's. Since I calculated measurements exactly to 3 decimal points, my em setup would look exactly the same as if pixels were used, assuming the user left his browser font size at the default. Anyway, there'll probably be some pixel imperfections using em's here and there, but I'll just have to deal with it.
You're correct. That's what I was looking to achieve. It looks like Ralph's 75% body font size change will achieve that.
Well, I want the font size to change visually in the browser without actually having to dig in the code and alter every instance of em's within the CSS file.
The way I have it now, the body has a width of 100% and I calculate all em measurements from that. By using 75% in the body it looks like I can scale things up from 11px to 12px while leaving the hundreds of em measurements as-is. I'll essentially be faking it in the style sheet, but it may work.
Thanks to everyone for their feedback in this matter.