html{position:relative;min-height:100%}body{margin-top:60px;margin-bottom:60px}.header{position:absolute;top:0;width:100%;height:60px;display:flex;justify-content:center;align-items:center;background-color:#f5f5f5}.footer{position:absolute;bottom:0;width:100%;height:60px;display:flex;justify-content:center;align-items:center;background-color:#f5f5f5}abbr{-webkit-text-decoration:underline dotted;text-decoration:underline dotted;cursor:help;-webkit-text-decoration-skip-ink:none;text-decoration-skip-ink:none;text-underline-offset:4px}