.nim-game-tree{display:flex;justify-content:center;padding:1.5rem 1rem;background-color:#f8f9fa;font-family:sans-serif;overflow-x:auto}.nim-node-wrapper{display:flex;flex-direction:column;align-items:center;position:relative}.node-content{position:relative;background-color:#fff;border-radius:12px;padding:12px 20px;text-align:center;cursor:pointer;border:2px solid;width:160px;box-shadow:0 1px 3px #00000014;transition:transform .2s,box-shadow .2s;z-index:1}.node-content:hover{transform:translateY(-2px);box-shadow:0 4px 8px #0000001f}.node-content.max-player{border-color:#4a90e2}.node-content.min-player{border-color:#50e3c2}.node-content.terminal{border-color:#f5a623;cursor:default}.node-state{font-size:1.05rem;font-weight:600;margin-bottom:4px}.winner{font-size:.9rem;font-weight:700;line-height:1.2}.terminal.max-player .winner,.terminal.min-player .winner{color:#f5a623}.expand-indicator{width:0;height:0;border-left:6px solid transparent;border-right:6px solid transparent;border-top:6px solid #aaa;margin:8px auto 0;transition:transform .2s}.expand-indicator.expanded{transform:rotate(180deg)}.children{display:inline-flex;width:fit-content;justify-content:center;align-items:flex-start;gap:12px;padding-top:40px;position:relative;margin:0 auto}.children:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%);width:2px;height:20px;background-color:#d1d5db}.children:after{content:"";position:absolute;top:20px;left:0;width:100%;height:2px;background-color:#d1d5db}.child-branch{position:relative;display:flex;align-items:flex-start;justify-content:center;flex:0 0 auto}.child-branch:before{display:none}.child-branch:after{content:"";position:absolute;top:20px;left:50%;transform:translate(-50%);width:2px;height:20px;background-color:#d1d5db}.child-branch>.node-content{margin-top:24px}.move-tooltip{visibility:hidden;width:140px;background-color:#333;color:#fff;text-align:center;border-radius:6px;padding:8px;position:absolute;z-index:10;bottom:115%;left:50%;margin-left:-70px;opacity:0;transition:opacity .2s ease-in-out;pointer-events:none}.node-content:hover .move-tooltip{visibility:visible;opacity:1}.move-tooltip:after{content:"";position:absolute;top:100%;left:50%;margin-left:-5px;border-width:5px;border-style:solid;border-color:#333 transparent transparent transparent}