<prompt> Kuandika darasa css kwa ajili ya kipengele na mstari wa mviringo  <response>: Here is an example of a CSS class for an element with a rounded border:css.rounded-border border: 1px solid 000000; border-radius: 10px;This will create a border around any element that has the rounded-border class assigned. The border property sets the width, style, and color of the elements border. In this case, it is set to 1 pixel wide, a solid line, and black color. The border-radius property defines the radius of the elements corners, giving it rounded edges. In this example, the radius is set to 10 pixels. You can adjust the values of both properties to customize the appearance of the rounded border. 