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.2s;display:flex;align-items:center;justify-content:center;gap:6px}.chat-tab:hover{background:var(--bg-hover);color:var(--text-primary)}.chat-tab.active{color:var(--accent);border-bottom:2px solid var(--accent);font-weight:500}.participant-count{background:var(--accent);color:#fff;font-size:11px;padding:2px 6px;border-radius:10px;min-width:18px;text-align:center}.tab-content{flex:1;display:flex;flex-direction:column;overflow:hidden}#chat-content{display:flex;flex-direction:column;height:100%}#chat-content .chat-messages{flex:1}.participants-list{padding:10px;overflow-y:auto;height:100%}.participant-section{margin-bottom:15px}.participant-section-header{font-size:12px;color:var(--text-secondary);font-weight:600;margin-bottom:8px;padding-bottom:5px;border-bottom:1px solid var(--border-color)}.participant-items{display:flex;flex-direction:column;gap:6px}.participant-item{display:flex;align-items:center;gap:10px;padding:8px 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