padding-block-start

The padding-block-start CSS property defines the logical block start padding of an element, which maps to a physical padding depending on the element’s writing mode, directionality, and text orientation.

The padding-block-start property takes the same values as physical padding properties such as padding-top. However, it can be equivalent to padding-top, padding-bottom, padding-left, or padding-right depending on the values set for writing-mode, direction, and text-orientation.

It relates to padding-block-end, padding-inline-start, and padding-inline-end, which define the other padding values of the element.

Values: <length> The size of the padding as a fixed value. Must be non-negative. <percentage> The size of the padding as a percentage, relative to the inline-size (width in a horizontal language) of the containing block. Must be non-negative.

Syntax example: padding-block-start: 10px; /* An absolute length */