There is NetSurf that supports CSS but it lacks many other features eg. JavaScript.
These are the problems we have today- Ports rather than specially written software. It's nobody's fault, I guess that most of the specialist 68x programers have moved on

Now most of the ported software is from more powerfull machines, and tries to pour a quart into a pint pot.
I think Javascript, CSS, and SSL are necesities.