to rename the div you just change its name. It will say <div id=”something”> or <div class=”something”> you just change the word in between the quotes.
That in turn references you stylesheet (css)
div id=”something” will be #something in your css
div class=”something” will be .something
so you change the name of the div to anything you want that is not already in your css, then in your css make a matching entry for the div you just named, then apply your css.
The easiest way would be to just copy that other entire block of css, paste it right under itself, change the name to whatever you renamed the div to, and adjust its width accordingly
I hope that makes sense, I’m very tired….