Word not reading style sheet properly

[BPB]

I created a Cascading Style Sheet and linked it to my Word document (saved as
a web page). The problem is that the font faces and sizes are correct for
some of the declarations, while others are wrong when I look at the document
in Word. However, when I create an identical document in Front Page and
preview it in my browser everything is correct. Any ideas?

Here's my style sheet:
body {margin-top: 10px;
margin-right: 10px;
margin-bottom: 0;
margin-left: 10px;
background-color: white;
}

..maintext {font-family: Verdana, Helvetica, Arial, sans-serif;
font-size: 10px;
font-weight: normal;
}


h1 {font-family: Verdana, Helvetica, Arial, sans-serif;
font-size: 16px;
font-weight: bold;
font-variant: small-caps;
}


h2 {font-family: Verdana, Helvetica, Arial, sans-serif;
font-size: 12px;
font-weight: bold;
}


h3 {font-family: Verdana, Helvetical, Arial, sans-serif;
font-size: 11px;
font-weight: normal;
font-variant: small-caps;
}

..highlighted {
font-family: Verdana, Helvetical, Arial, sans-serif;
font-size: 10pt;
font-weight: bold;
font-variant: small-caps;
background-color: yellow;
}

--
BPB

PS This is for a company Intranet and the people writing the pages will be
creating them in Word, so I have to get this to work. Otherwise I'd use
Dreamweaver or FP.