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0;box-shadow:inset 0 0 0 2px #00000024;pointer-events:none}.game-board__row{display:contents}.board-cell{width:var(--stone-size);height:var(--stone-size);place-self:start;border-radius:50%;border:none;padding:0;background:transparent;font-size:0;line-height:0;cursor:pointer;touch-action:manipulation;transform:translate(-50%,-50%);position:relative;z-index:1}.board-cell:focus-visible,.board-cell.is-focused{outline:2px solid rgba(42,31,18,.7);outline-offset:2px}.board-cell[aria-disabled=true]{cursor:default}.board-cell:before{content:"";width:100%;height:100%;border-radius:50%;display:block;margin:auto;opacity:0;transform:scale(.4);transition:opacity .16s ease,transform .16s ease}.board-cell--black:before{opacity:1;transform:scale(1);background:radial-gradient(circle at 30% 30%,#5a5a5a,#1a1a1a 70%);box-shadow:0 0 10px #0000004d}.board-cell--white:before{opacity:1;transform:scale(1);background:radial-gradient(circle at 30% 30%,#fff,#d9d9d9 70%);box-shadow:0 0 10px #0003}.board-cell--none:after{content:"";position:absolute;top:50%;left:50%;width:30%;height:30%;border-radius:50%;background:#2a1f1233;transform:translate(-50%,-50%);opacity:0;transition:opacity .12s ease}.board-cell--none:hover:after{opacity:1}@media (max-width: 900px){.app__main{grid-template-columns:1fr}}@media (max-width: 600px){.game-board{--cell-size: calc(100% / var(--board-squares))}.game-board__row{gap:0}.board-cell{width:calc(var(--cell-size) * .82);height:calc(var(--cell-size) * .82)}}.app__learning-button{display:flex;align-items:center;justify-content:center;gap:6px;padding:8px 16px;margin-top:12px;background:linear-gradient(135deg,#9b59b6,#8e44ad);border:none;border-radius:12px;color:#fff;font-size:.875rem;font-weight:600;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 4px #0000001a}.app__learning-button:hover{transform:translateY(-1px);box-shadow:0 4px 8px #9b59b64d}.app__modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.app__modal-content{max-width:90vw;max-height:90vh;overflow-y:auto}.app__online-info{padding:12px;background:#4a90e21a;border-radius:8px;margin-bottom:12px}.app__online-info p{margin:4px 0;font-size:.875rem;color:#2a1f12}.app__online-turn{color:#27ae60;font-weight:600}.app__online-waiting{color:#f39c12;font-weight:600}.app__online-spectator{color:#9b59b6;font-weight:600}.app__online-spectators{color:#666;font-size:.875rem}@keyframes stone-pop{0%{transform:translate(-50%,-50%) scale(.2);opacity:.3}70%{transform:translate(-50%,-50%) scale(1.05);opacity:1}to{transform:translate(-50%,-50%) scale(1)}}@keyframes highlight-line{0%{box-shadow:0 0 #fffc}to{box-shadow:0 0 16px #fffc}}.board-cell.is-placed{animation:stone-pop .24s ease-out}.board-cell.is-winning{animation:highlight-line .8s ease-in-out infinite alternate}