several .css files used on one page?
as i'm working on a rather large site at the moment, i wanted to know whether it is reasonable to use several .css files.
for example, as i'm coding in php, i would create a bottom.php file, which i can call in from every page, which is supposed to include this.
now, instead of having to include the whoée lot of css into one single file, is it any better to create a bottom.css apart from the main.css?
-will i still have to call in the css in the <head> section of the page, or is there another trick? as i might end up calling 5/6 different css files from the start...?
-can i add a <head> section to every single .php file?