This works:

p {font-size: 12pt;
     font-weight: normal;
     font-style: normal;
     margin-top: 0;
     margin-bottom: 10}
Tags specified in uppercase in style sheets are not recognized:
This does not work:

P {font-size: 12pt;
     font-weight: normal;
     font-style: normal;
     margin-top: 0;
     margin-bottom: 10}

I checked the W3C CSS1 recommendation and all their examples are in
uppercase.

Many help authoring tools generate style sheets with uppercase tags