.glass-effect{background:rgba(255,255,255,.1);border-radius:16px;box-shadow:0 4px 30px rgba(0,0,0,.1);backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px);border:1px solid rgba(255,255,255,.3)}.chessboard-bg{background-color:#fff;background-image:linear-gradient(45deg,#ccc 25%,transparent 0),linear-gradient(-45deg,#ccc 25%,transparent 0),linear-gradient(45deg,transparent 75%,#ccc 0),linear-gradient(-45deg,transparent 75%,#ccc 0);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0}