Typically, I have found that there are at least some issues when not using Tables for forms. The general things I have not been able to solve:
- Background-color for fields/inputs is not really possible without a faux background
- Auto-sizing columns, but I think this is OK
- Field hover with CSS, you could use JS but Tables can do this with pure CSS
I might be missing a few things, but the most flexible mark-up if you are using CSS is as below:
<div class='form-field'>
<label>Name</label>
<input />
</div>
You have issues if you want multiple fields per label section, so you have to introduce another div to hold the inputs (to allow the label to still float left etc):
<div class='form-field'>
<label>Name</label>
<div class='form-inputs'>
<input />
<input />
</div>
</div>
With the above mark-up you can achieve very flexible forms, I won't post the CSS as it's very similar to a 2 Column-Layout.
I still need to sit down and try and figure out if pure CSS forms are viable for all occasions but tbh it's very unlikely!
Forms are the worst thing to style using CSS. The only major Cross Browser problems i've had are when styling the FieldSet and Legend elements. No real hacks, but they take some work to look good.