@keyframes shake-piece{0%{transform:translate(0)}20%{transform:translate(-5px)}40%{transform:translate(5px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}to{transform:translate(0)}}.shake-error{transform-origin:50%;animation:.3s ease-in-out shake-piece}@keyframes shake-check{0%{transform:translate(0)}20%{transform:translate(-4px)}40%{transform:translate(4px)}60%{transform:translate(-3px)}80%{transform:translate(3px)}to{transform:translate(0)}}.in-check-warning{transform-origin:50%;animation:.4s ease-in-out infinite shake-check}.chess-piece{will-change:transform;transition:transform .15s cubic-bezier(.25,.46,.45,.94)}@keyframes slide-up{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.result-sheet{animation:.28s cubic-bezier(.34,1.05,.64,1) forwards slide-up}@keyframes pop-in{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.confirm-popup{animation:.2s cubic-bezier(.34,1.1,.64,1) forwards pop-in}@keyframes highlight-fade{0%{opacity:.5}to{opacity:.25}}.last-move-highlight{animation:.3s ease-out forwards highlight-fade}svg{touch-action:none;-webkit-tap-highlight-color:transparent}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#ccc;border-radius:2px}@keyframes piece-enter{0%{opacity:0}to{opacity:1}}@keyframes piece-select{0%{opacity:1}40%{opacity:.6}to{opacity:1}}.piece-select-pulse{animation:.15s ease-out forwards piece-select}@media (prefers-reduced-motion:reduce){.piece-enter,.piece-select-pulse{animation:none}}@keyframes piece-flip{0%{transform:rotateY(0)scaleX(1)}50%{transform:rotateY(90deg)scaleX(.1)}to{transform:rotateY(0)scaleX(1)}}.piece-flip{transform-origin:50%;transform-box:fill-box;animation:.32s ease-in-out forwards piece-flip}.piece-enter{animation:.18s ease-out forwards piece-enter}@keyframes piece-capture{0%{opacity:1;transform:scale(1)}to{opacity:0;transform:scale(.5)}}.piece-capture{transform-origin:50%;transform-box:fill-box;animation:.2s ease-out forwards piece-capture}@keyframes valid-move-pulse{0%,to{opacity:.45;r:14}50%{opacity:.7;r:16}}@media (prefers-reduced-motion:reduce){.piece-flip,.piece-enter,.piece-capture{animation:none}}