실습을 위한 준비를 한다. sunblocks home sub1sub1sub1 sub2 sub3 about sub1 sub2 sub3 sub4 sub5 sub6 contact sidemenu1 sidemenu2 sidemenu3 All Rights Reserved By Sunblocks. 푸터 하단에 scroll to top 버튼을 추가한다. html, body{ margin: 0; padding: 0; box-sizing: border-box; } body{ height: 200vh; display: flex; flex-direction: column; } header, footer{ height: 70px; flex: none; } main{ flex: 1; /* background: brown; */..