CSS failure when using INCLUDE Function

[Prakash]

I downloaded a Template + CSS File for a Website that I'm Building, the template worked well until I tried to break it down and put every code in its own file (for easy modification and editing in the future).So, when I cut the head part which included (Title + Meta Data .. etc ), and put it in its own file, and replaced it (for sure) with an \[code\]include()\[/code\] function, I lost the CSS styles and returned to the basic & standard style (Black & white with no extra format .. etc)Where did I Go wrong? Knowing that here is the include function that I've used:\[code\]<?phpinclude 'files/head.php';?>\[/code\]