.glass-effect{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);box-shadow:0 8px 32px rgba(0,0,0,.1)}.glass-effect,.glass-effect-dark{backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.glass-effect-dark{background:rgba(0,0,0,.2);border:1px solid rgba(255,255,255,.1);box-shadow:0 8px 32px rgba(0,0,0,.3)}.gradient-bg{background:linear-gradient(135deg,#667eea,#764ba2)}.gradient-bg-dark{background:linear-gradient(135deg,#1a1a2e,#16213e 50%,#0f3460)}.board-glass{background:rgba(255,255,255,.05);backdrop-filter:blur(15px);-webkit-backdrop-filter:blur(15px);border:1px solid rgba(255,255,255,.1);box-shadow:0 8px 32px rgba(0,0,0,.1),inset 0 1px 0 rgba(255,255,255,.1)}.stone-3d{box-shadow:0 4px 8px rgba(0,0,0,.3),inset 0 2px 4px rgba(255,255,255,.2);border-radius:50%;transition:all .3s ease}.stone-3d:hover{transform:translateY(-2px);box-shadow:0 6px 12px rgba(0,0,0,.4),inset 0 2px 4px rgba(255,255,255,.3)}.button-glass{background:rgba(255,255,255,.1);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);box-shadow:0 4px 16px rgba(0,0,0,.1);transition:all .3s ease}.button-glass:hover{background:rgba(255,255,255,.2);transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,.15)}.card-glass{background:rgba(255,255,255,.08);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.15);box-shadow:0 8px 32px rgba(0,0,0,.1),inset 0 1px 0 rgba(255,255,255,.1)}.valid-move-highlight{background:radial-gradient(circle,rgba(59,130,246,.3) 0,rgba(59,130,246,.1) 70%);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);border:1px solid rgba(59,130,246,.3);animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:.6;transform:scale(1)}50%{opacity:1;transform:scale(1.05)}}.stone-place{animation:placeStone .5s ease-out}@keyframes placeStone{0%{transform:scale(0) rotate(180deg);opacity:0}50%{transform:scale(1.2) rotate(90deg);opacity:.8}to{transform:scale(1) rotate(0deg);opacity:1}}.stone-flip{animation:flipStone .6s ease-in-out}@keyframes flipStone{0%{transform:rotateY(0deg)}50%{transform:rotateY(90deg)}to{transform:rotateY(180deg)}}.victory-particle{position:absolute;width:4px;height:4px;background:linear-gradient(45deg,#ffd700,#ffed4e);border-radius:50%;animation:victoryFloat 3s ease-out infinite}@keyframes victoryFloat{0%{transform:translateY(0) scale(0);opacity:1}to{transform:translateY(-100px) scale(1);opacity:0}}.ai-thinking{animation:thinking 1.5s ease-in-out infinite}@keyframes thinking{0%,to{opacity:.5;transform:scale(1)}50%{opacity:1;transform:scale(1.1)}}@media (max-width:768px){.board-glass{backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.stone-3d{box-shadow:0 2px 4px rgba(0,0,0,.3),inset 0 1px 2px rgba(255,255,255,.2)}}