탭메뉴 갯수마다 다른 width값 CSS로만 구하기
/* one item */div:nth-child(1):nth-last-child(1) {width: 100%;} /* two items */div:nth-child(1):nth-last-child(2),div:nth-child(2):nth-last-child(1) {width: 50%;} /* four items */div:nth-child(1):nth-last-child(4),div:nth-child(2):nth-last-child(3),div:nth-child(3):nth-last-child(2),div:nth-child(4):nth-last-child(1) {width: 25%;}
