body{font-family:'Roboto Mono', monospace;color:#333;margin:0;padding:0;background-color:#EEE;opacity:0.8;background:radial-gradient(circle, transparent 20%, #EEE 20%, #EEE 80%, transparent 80%, transparent),radial-gradient(circle, transparent 20%, #EEE 20%, #EEE 80%, transparent 80%, transparent) 37.5px 37.5px,linear-gradient(#DDD 3px, transparent 3px) 0 -1.5px,linear-gradient(90deg, #DDD 3px, #EEE 3px) -1.5px 0;background-size:75px 75px, 75px 75px, 37.5px 37.5px, 37.5px 37.5px}a{text-decoration:underline;color:#333}main{display:flex;justify-content:center;align-content:center;height:100vh}main h1{margin:0;line-height:100vh}footer{position:fixed;bottom:0;width:100%;text-align:center;margin:20px 0}