<resolved> CSS inherit

[JPicasso]

How do I actually CASCADE these things.

Or maybe I want to inherit... I'm not sure.

anyway.

Say I define a style as

.basictitle {font-size: 16;
			color: white;
			font-family: arial;
			font-weight: bold;
			border-style: solid;
			border-width: 1px;
			background-color: darkblue;
			}

Now, what I want to do is use this for my entire website.
BUT, for some pages I want to modify the font size
for this element.

This willl allow me to use a basic style, and then for each
page I want to put something like :

.advtitle {[somecodehere that references .basictitle];
           font-size:55;}

so that advtitle will use the bastitle, but be a bit bigger??

is there a way to do this?