body{background-color:#e4e4e4}.page-number{display:inline-block}a{color:#000}#menu{border:1px solid black;padding:10px;margin-bottom:15px;max-width:800px}select{max-width:100%}table{margin-top:15px}thead{position:sticky;top:0;z-index:1}th{background-color:#333;color:#fff;padding:15px}td{padding:10px}#turtle{border:3px solid #103f1d;width:65px;height:65px;background-color:#7bad18;margin:16px}input[type=checkbox]{-webkit-appearance:initial;-moz-appearance:initial;appearance:initial;background:gray;width:15px;height:15px;border:none;position:relative}input[type=checkbox]:checked{background:red}input[type=checkbox]:checked:after{content:"X";color:#fff;position:absolute;left:50%;top:50%;-webkit-transform:translate(-50%,-50%);-moz-transform:translate(-50%,-50%);-ms-transform:translate(-50%,-50%);transform:translate(-50%,-50%)}