CSS is actually quite simple, but getting it to work in multiple browsers is a challenge. This is where TopStyle shines!
TopStyle Pro's Style Checker is a powerful tool which validates your style sheets against multiple browsers, flagging any invalid properties or values it finds. It also warns if bugs in popular browsers may cause problems even when your style sheets are perfectly valid.
What's more, TopStyle Pro enables you to pass your style sheets directly to the W3C's CSS Validation Service, so you can quickly check against the official CSS specifications.