Malte,
By default, when no style is defined for fieldset and legend, the fieldset has a border. The legend text appears in between fieldset borders. So, styles should be applied for both fieldset and legend to get what you want. I'm not a designer and I have very little knowledge with CSS but something like the following should work:
.fieldset-class {
border: 0px solid #FFFFFF;
border-top-width: 20px;
border-top-style: solid;
border-top-color: #DDDDDD;
}
.legend-class {
background: #DDDDDD;
font-weight: bold;
}
However, there's a style for fieldset in acs-templating/www/resources/forms.css that takes precedence and custom styles won't be applied:
.margin-form fieldset, .vertical-form fieldset, fieldset {
border: 0px solid #000;
}
We'll have to fix this for next release.
