body{background-color:gray;font-family:sans-serif}.debug-tools{position:fixed;top:0;right:0;background-color:#00000080;padding:10px;z-index:1000;color:#fff}.debug-tools h2{margin:0 0 12px}.debug-tools ul{margin:0;padding:0}.debug-tools li{list-style-type:none;cursor:pointer}