.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(.88)saturate(.95)}.z-layer-0 .mahjong-tile-inner{box-shadow:1px 1px #bbb6a4,2px 2px 1px #a09b8a,0 3px 6px #0006}.z-layer-1{filter:brightness(.93)saturate(.98)}.z-layer-1 .mahjong-tile-inner{box-shadow:1px 1px #ccc7b4,2px 2px #b5b09e,3px 3px 1px #9a9588,0 4px 10px #0006}.z-layer-2{filter:brightness(.98)}.z-layer-2 .mahjong-tile-inner{box-shadow:1px 1px #d8d3c0,2px 2px #c4bfac,3px 3px #b0ab98,4px 4px 1px #989384,0 6px 14px #0006}.z-layer-3{filter:brightness(1.04)}.z-layer-3 .mahjong-tile-inner{box-shadow:1px 1px #e2ddcc,2px 2px #cec9b8,3px 3px #bab5a4,4px 4px #a6a192,5px 5px 1px #928d7e,0 8px 18px #0006}.z-layer-4{filter:brightness(1.1)}.z-layer-4 .mahjong-tile-inner{box-shadow:1px 1px #ece7d8,2px 2px #d8d3c4,3px 3px #c4bfb0,4px 4px #b0ab9c,5px 5px #9c9788,6px 6px 1px #888374,0 10px 22px #0006}.z-layer-5{filter:brightness(1.14)}.z-layer-5 .mahjong-tile-inner{box-shadow:1px 1px #f0ebe0,2px 2px #dcd7c8,3px 3px #c8c3b4,4px 4px #b4afa0,5px 5px #a09b8c,6px 6px #8c877a,7px 7px 1px #787368,0 12px 26px #0006}.z-layer-6{filter:brightness(1.18)}.z-layer-6 .mahjong-tile-inner{box-shadow:1px 1px #f4efe4,2px 2px #e0dbcc,3px 3px #ccc7b8,4px 4px #b8b3a4,5px 5px #a4a090,6px 6px 1px #908b7c,0 14px 30px #00000073}.z-layer-7{filter:brightness(1.22)}.z-layer-7 .mahjong-tile-inner{box-shadow:1px 1px #f8f3e8,2px 2px #e4dfd0,3px 3px #d0cbbc,4px 4px #bcb7a8,5px 5px #a8a394,6px 6px 1px #949080,0 16px 34px #00000073}.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(-3px,-3px,10px)}.z-layer-2{transform:translate3d(-6px,-6px,20px)}.z-layer-3{transform:translate3d(-9px,-9px,30px)}.z-layer-4{transform:translate3d(-12px,-12px,40px)}.z-layer-5{transform:translate3d(-15px,-15px,50px)}.z-layer-6{transform:translate3d(-18px,-18px,60px)}.z-layer-7{transform:translate3d(-21px,-21px,70px)}.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}