[Plugin: Contact Form 7] class not recognized

I’ve added this CSS to the style:
.field_align{
float:right;
margin-right:48em;
width: 20em}

and then use it in the form fields to align things.

Thus, [text testelement class:field_align]

although I see the class in Firebug, the CSS is being ignored? I would normally attribute that to missing or bad syntax, so I’m at a loss.

It all comes out looking like this:
<span class=”wpcf7-form-control-wrap testelement”>
<input class=”wpcf7-form-control wpcf7-text field_align” type=”text” size=”40″ value=”” name=”testelement”>