No matter what I change in my .css file, the page remains the same - what\'s more, neither changing the link tag so that it points to another .css file nor deleting it completel
You css is getting cached. If you clear your cache, you will see a difference.
There are techniques you can apply to bust the cache, such as appending a timestamp or build number to your filename or link. If this is for development purposes and your production copy won't change much, I wouldn't bother, as clearing your browser's cache will suffice.