:root{--color-primary: #666;--border-style: solid 1px #777}html,body{position:relative;width:100%;height:100%}body{margin:0;padding:8px;box-sizing:border-box;font-family:Arial,sans-serif}main{text-align:center;padding:1em;margin:0 auto;color:#333}h1{color:var(--color-primary);font-size:4em;font-weight:100}