body{display:flex;justify-content:center;font-family:"Courier New",Courier,monospace;background-color:#000;height:100vh}#mainMenu{display:none;height:100%}#mainMenu.active{display:block}.menu{display:none;flex-direction:column;justify-content:center;height:100%;gap:50px}.menu.active{display:flex}button{display:block;background-color:transparent;border:none;color:#0f0;font-size:20px;cursor:pointer}button:hover{color:#ff0}#loading{display:none}#loading.active{display:flex;color:#0f0;font-size:20px;flex-direction:column;justify-content:center;gap:50px}#btnLoadingReturn{cursor:pointer;text-align:center}