I'm trying to make a website that will work for everyone including people with very old systems that can use Arachne web browser for DOS to view pages.

I'm also trying to condense my HTML code and offload code into stylesheets but despite Arachne 1.70 claiming it would support CSS 1.0 standards, it seems to ignore some things. In particular, if I try to make a table fill a screen horizontally using this CSS code:

1TABLE {width: 100%}

then it is ignored by Arachne.

I'm not going to switch to Arachne 1.9x because I had issues running it on my older PC especially from a bootable CD. So I'm sticking with Arachne 1.70

So what exactly are my limits in terms of CSS with Arachne? Like what CSS 1.0 commands does it support and what does it NOT support?