Is the detail card displayed as an itemTpl? What I do is create a normal css class which I insert in my index html with:
Code:
<link rel="stylesheet" type="text/css" href="mystyle.css" />
For example, I create a css file with something like this:
Code:
.headertext {
font-family: "Arial Black", Gadget, sans-serif;
font-size: 18px;
font-weight: bold;
}
Then in the item tpl you can do something like
Code:
<div class="header text">{title}</div>
For more complex ones or if my brain is fried I do a mockup in Dreamwevar or similar web editor then I can apply the CSS easily.
:-)