.board-3d{transform:perspective(1100px) rotateX(2deg);box-shadow:0 24px 40px #18352735,0 10px 0 #704724;transition:transform .25s ease,box-shadow .25s ease}.board-3d:hover{transform:perspective(1100px) rotateX(5deg) translateY(-2px)}.board-3d .square{position:relative;text-shadow:0 3px 1px #0005;transition:filter .15s ease,transform .15s ease}.board-3d .square:hover{filter:brightness(1.08);transform:translateZ(2px)}.board-3d .light{background:linear-gradient(145deg,#f0dfc1,#d3b78b)}.board-3d .dark{background:linear-gradient(145deg,#b77f47,#87572f)}