CSS Border Properties allow you to define the boundaries of HTML elements. You can control width, style, color, radius, and use shorthand to make your styling efficient and visually appealing.

The border-width property sets the thickness of the border. It can accept values like thin, medium, thick, or specific lengths in px, em, etc.

The border-style property sets the type of border. Options include solid, dotted, dashed, double, groove, and ridge.

The border-color property sets the color of the border. You can use named colors, HEX, RGB, or RGBA values.

The border-radius property allows you to round the corners of an element.

The border shorthand lets you set width, style, and color all in one declaration.