td.person{border:solid 1px black;background-color:white;text-align:center;}td.mar_l{border-top-style:solid;border-right-style:solid;}td.mar_r{border-top-style:solid;}td.mar_b{border-right-style:solid;}td.sibling_r{border-top-style:solid;border-left-style:solid;}td.sibling_l{border-left-style:solid;}