XHTML and CSS

Can anybody tell me the what is the difference between XHTML and CSS?

XHTML and CSS are both languages that are used to make web pages.

XHTML is very similar to HTML and serves the same purpose. XHTML & HTML are both used to set the structure of the page - to define images, links, text, headlines, and so on.

CSS (Cascading Style Sheets) is used to define the style of the page - colors, spacing, and so on.