What if you don't want the border thickness to be the same on all four sides?
In that case, another version of the
border-width property allows you to specify the width for each side of the border.
border-width: 3px 1px 2px 1px;
The values in the example above refer to the border width in clockwise order (top: 3 pixels, right: 1 pixel, bottom: 2 pixels, left: 1 pixel).