.App{text-align:center;margin:0;padding:0;box-sizing:border-box;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.square{height:7rem;width:7rem;border:6px solid rgba(0,0,0,.729);font-size:5rem;padding:5px;cursor:pointer;border-radius:20px 20px 0;-webkit-border-radius:20px 20px 0px 20px;-moz-border-radius:20px 20px 0px 20px;-ms-border-radius:20px 20px 0px 20px;-o-border-radius:20px 20px 0px 20px;box-shadow:#0e1e251f 0 2px 4px,#0e1e2552 0 2px 16px}.board{width:25rem;margin:50px auto auto;display:grid;grid-template-columns:repeat(3,auto);grid-gap:.1rem}.game-over{max-width:40%;padding:50px;display:flex;flex-direction:column;margin:auto;box-shadow:#0e1e251f 0 2px 4px,#0e1e2552 0 2px 16px}.game-over span{font-size:4rem;font-weight:600;margin-left:1rem;margin:10px}.btn{width:9rem;margin:auto;padding:10px;background-color:#000;color:#fff;font-size:1.5rem;border-radius:10px;font-weight:700;-webkit-border-radius:10px;-moz-border-radius:10px;-ms-border-radius:10px;-o-border-radius:10px}