[html] How can I get two form fields side-by-side, with each field’s label above the field, in CSS?

How about something like this?

<div id="leftContainer">
  <span>Company Name</span>
  <br><input type="text" value="John Lewis Partnership">
</div>
<div id="rightContainer">
  <span>Contact Name</span>
  <br><input type="text" value="Timothy Patten">
</div>

Then, you can align the 2 divs by floating them left and right:-

#leftContainer {
   float:left;
}

#rightContainer {
   float:right;
}