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14px;border:none;border-radius:7px;background:transparent;color:#ffffff80;font-size:.85rem;font-weight:500;cursor:pointer;transition:all .15s ease;white-space:nowrap;text-align:center}.opening-tab:hover{background:#ffffff12;color:#ffffffd9}.opening-tab.active{background:var(--accent-color, #bf5af2);color:#fff;font-weight:600}.opening-commentary-panel{display:flex;flex-direction:column;gap:12px;padding:24px;flex:1 1 0;width:100%;min-width:0;max-width:100%;overflow-wrap:anywhere;background:#ffffff0a;border-radius:12px;border:1px solid rgba(255,255,255,.08);box-sizing:border-box;align-self:flex-start}.opening-commentary-label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--accent-color, #bf5af2)}.opening-commentary-heading{font-size:1.05rem;font-weight:600;color:var(--text-color, #fff);line-height:1.3}.opening-commentary-move-badge{display:inline-block;font-family:Courier New,Courier,monospace;font-size:1.1rem;font-weight:700;color:var(--accent-color, #bf5af2);background:#bf5af21a;border:1px solid rgba(191,90,242,.25);border-radius:6px;padding:4px 12px;align-self:flex-start}.opening-commentary-text{font-size:.97rem;color:#ffffffd1;line-height:1.75;margin:0}.opening-commentary-hint{font-size:.82rem;color:#ffffff4d;font-style:italic;margin:auto 0 0}.opening-key-ideas-section{margin-bottom:48px}.opening-key-ideas-section h2{font-size:1.4rem;font-weight:600;color:var(--text-color, #fff);margin:0 0 20px;padding-bottom:10px;border-bottom:1px solid rgba(255,255,255,.1)}.opening-key-ideas-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}.opening-key-idea-item{display:flex;flex-direction:column;padding:14px 18px;background:#ffffff0a;border-radius:10px;border:1px solid rgba(255,255,255,.07);font-size:.97rem;color:#fffc;line-height:1.6;transition:border-color .15s ease}.opening-key-idea-item:hover{border-color:#bf5af240}.opening-key-idea-bullet{color:var(--accent-color, #bf5af2);font-size:1rem;flex-shrink:0;margin-top:1px}.opening-key-idea-row{display:flex;align-items:flex-start;gap:14px;width:100%}.opening-key-idea-text{flex:1;min-width:0}.idea-expand-btn{flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;background:#bf5af21f;border:1px solid rgba(191,90,242,.3);color:var(--accent-color, #bf5af2);border-radius:6px;padding:2px 10px;font-size:.7rem;transition:all .15s ease;margin-top:1px;pointer-events:none}.opening-key-idea-row:hover .idea-expand-btn,.idea-expand-btn.open{background:var(--accent-color, #bf5af2);color:#fff}.idea-board-panel{margin-top:14px;display:flex;justify-content:flex-start}.idea-board-wrap{width:260px;height:260px;border-radius:0;overflow:hidden;box-shadow:0 3px 16px #00000073;flex-shrink:0}.idea-board-inner{width:260px;height:260px}[dir=rtl] .opening-board-wrap,[dir=rtl] 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