What are the items that used as a CSS Selector?

CSS selectors can target HTML elements using various criteria, including element types (e.g., div, p), classes (e.g., .classname), IDs (e.g., #idname), attribute values (e.g., [type="text"]), and pseudo-classes (e.g., :hover). Additionally, combinators like descendant ( ), child (>), and sibling (+, ~) selectors can establish relationships between elements. More advanced selectors also include pseudo-elements (e.g., ::before, ::after) and group selectors (e.g., h1, h2, h3). These selectors allow for precise targeting and styling of elements within a webpage.