.mahjong-board-container{perspective:1200px;transform-style:preserve-3d}.mahjong-board{background:radial-gradient(circle,#1a4a2f 0%,#0c2618 100%);border:12px solid #2e1d11;border-radius:16px;transition:transform .5s;position:relative;overflow:hidden;box-shadow:inset 0 0 40px #000c,0 10px 30px #00000080}.mahjong-tile{-webkit-user-select:none;user-select:none;cursor:default;width:72px;height:96px;transform-style:preserve-3d;flex-direction:column;justify-content:center;align-items:center;font-family:Segoe UI Emoji,Apple Color Emoji,Noto Color Emoji,sans-serif;transition:all .2s cubic-bezier(.25,.8,.25,1);display:flex;position:absolute}.mahjong-tile-inner{color:#111;background:#fdfcf7;border:1px solid #dcd8c8;border-radius:6px;justify-content:center;align-items:center;width:100%;height:100%;font-size:3.8rem;line-height:1;transition:all .15s;display:flex;position:relative}.mahjong-tile.tile-open{cursor:pointer}.mahjong-tile.tile-open:hover .mahjong-tile-inner{background:#fff;transform:translateY(-2px)}.mahjong-tile.tile-selected .mahjong-tile-inner{background:#fffdf5;border-color:#f59e0b;outline:2px solid #f59e0b;transform:translateY(-3px)}.mahjong-tile.tile-locked{filter:brightness(.8)contrast(.9)grayscale(.2);pointer-events:none}.mahjong-tile.tile-locked .mahjong-tile-inner{background:#f1ede2;border-color:#d1ccbc}@keyframes hint-pulse{0%{box-shadow:0 0 #3b82f6,1px 1px #e0dbcb,2px 2px #ccc7b6,3px 3px #1e5a36,4px 4px #17472a,5px 5px #0e2f1b,6px 6px 4px #0006}50%{transform:translate(-2px,-2px);box-shadow:0 0 20px #3b82f6,0 0 35px #3b82f699,1px 1px #fff,2px 2px #e0dbcb,3px 3px #246d41,4px 4px #1d5734,5px 5px #123d24,8px 8px 10px #3b82f666}to{box-shadow:0 0 #3b82f6,1px 1px #e0dbcb,2px 2px #ccc7b6,3px 3px #1e5a36,4px 4px #17472a,5px 5px #0e2f1b,6px 6px 4px #0006}}.mahjong-tile.tile-hint .mahjong-tile-inner{animation:1.2s ease-in-out infinite hint-pulse}.z-layer-0{filter:brightness(.9);box-shadow:0 2px 4px #0006}.z-layer-1{filter:brightness(.95);box-shadow:0 4px 8px #00000073}.z-layer-2{filter:brightness();box-shadow:0 8px 16px #00000080}.z-layer-3{filter:brightness(1.03);box-shadow:0 12px 24px #0000008c}.z-layer-4{filter:brightness(1.06);box-shadow:0 16px 32px #0009}.z-layer-5{filter:brightness(1.09);box-shadow:0 20px 40px #000000a6}.z-layer-6{filter:brightness(1.12);box-shadow:0 24px 48px #000000b3}.z-layer-7{filter:brightness(1.15);box-shadow:0 28px 56px #000000bf}.mahjong-tile.tile-hint .mahjong-tile-inner{border-color:#3b82f6;animation:1.2s ease-in-out infinite hint-pulse}.tile-symbol-character{color:#c2185b}.tile-symbol-bamboo{color:#2e7d32}.tile-symbol-circle{color:#1565c0}.tile-symbol-wind{color:#37474f}.tile-symbol-dragon{color:#d32f2f}.tile-symbol-flower{color:#8e24aa}.tile-symbol-season{color:#e65100}.z-layer-0{transform:translate(0,0)}.z-layer-1{transform:translate3d(-2px,-2px,8px)}.z-layer-2{transform:translate3d(-4px,-4px,16px)}.z-layer-3{transform:translate3d(-6px,-6px,24px)}.z-layer-4{transform:translate3d(-8px,-8px,32px)}.z-layer-5{transform:translate3d(-10px,-10px,40px)}.z-layer-6{transform:translate3d(-12px,-12px,48px)}.z-layer-7{transform:translate3d(-14px,-14px,56px)}.mahjong-tile-inner:before{content:"";pointer-events:none;background:linear-gradient(135deg,#fff6 0%,#fff0 50%,#00000008 100%);border-radius:4px;position:absolute;inset:0}