h1,h1 a{color:#fff}.pannel,h1{width:800px}body,html{margin:12px;padding:0;background-color:grey}.pannel,.pannel .dead{background-color:#000}h1{display:block;text-align:center;margin:0 auto;text-shadow:#000 2px 2px}h1 a{font-size:20px;text-shadow:#000 0 0}.pannel{display:flex;flex-wrap:wrap;margin:18px auto;height:600px;border:6px solid #ccc}.pannel .cell{width:9px;height:9px;border-right:1px #333 solid;border-bottom:1px #333 solid}.pannel .young{background-color:pink}.pannel .old{background-color:red}