I try to put a Exclusive CSS for a page, but i can't because if i change one it changes every page.
I love your theme!! Your are sensational.

Preface You CSS selectors with 'body.' and the unique class name for the page

You can also add CSS directly to a page from the page editor, so it affects just that page. Just make sure you're using the Text editor instead of the Visual editor, and enclose your CSS inside <script> ... </script> tags.

@CrouchingBruin don't you mean you can use the <style>...</style>

Oops, you're right!