:root{height:100%}body{height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:10px;margin:0}*{box-sizing:border-box}.box{padding:10px;border:2px solid black;border-radius:4px;display:flex;flex-direction:column;gap:4px;justify-content:center;align-items:center}a{text-decoration:none;color:#000}