Playing with CSS

I'm adding some style elements for presenting source code. Here's what I have so far:

/**
* Welcome to the canonical First C Program
* that every larval programmer writes.
*/
#include <stdio.h>

int main(void)
{
printf("This is a test of the Emergency Broadcast System\n");
return 0;
}

I've had to widen the content part of the template to accommodate.