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var(--chat-line);border-radius:6px;cursor:pointer}.chat-header-nickname-btn:hover{background:#f0f6f8;color:#1f2b2d}.chat-header-nickname-label{max-width:72px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-header-close{width:32px;height:32px;display:flex;align-items:center;justify-content:center;padding:0;font-size:1.1rem;color:#5c6d74;background:transparent;border:none;border-radius:8px;cursor:pointer}.chat-header-close:hover{background:#f0f6f8;color:#1f2b2d}.chat-body{flex:1;min-height:0;display:flex;flex-direction:column}.chat-participant-notice{flex-shrink:0;position:relative;padding:.2em 1rem;background:#bcd6e7;border-bottom:1px solid var(--chat-line);font-size:.85rem;color:#555}.chat-participant-trigger{display:flex;align-items:center;justify-content:center;gap:.35rem;width:100%;padding:.25rem 0;font-size:.85rem;color:inherit;background:transparent;border:none;border-radius:6px;cursor:pointer;transition:background .15s ease}.chat-participant-trigger:hover{background:#0000000f;color:#1f2b2d}.chat-participant-trigger:focus{outline:none;box-shadow:0 0 0 2px var(--chat-accent)}.chat-participant-trigger-text strong{color:#1f2b2d}.chat-participant-trigger-icon{font-size:.65rem;opacity:.8}.chat-participant-popup{position:absolute;top:100%;left:.5rem;right:.5rem;margin-top:.25rem;padding:0;background:var(--chat-bubble-others);border:1px solid var(--chat-line);border-radius:10px;box-shadow:0 4px 16px #0000001f;z-index:10;max-height:220px;display:flex;flex-direction:column}.chat-participant-popup-header{display:flex;align-items:center;justify-content:space-between;padding:.5rem .75rem;border-bottom:1px solid var(--chat-line);flex-shrink:0}.chat-participant-popup-title{font-size:.8rem;font-weight:600;color:#1f2b2d}.chat-participant-popup-close{width:28px;height:28px;padding:0;display:flex;align-items:center;justify-content:center;font-size:.9rem;color:#666;background:transparent;border:none;border-radius:6px;cursor:pointer}.chat-participant-popup-close:hover{background:#0000000f;color:#1f2b2d}.chat-participant-popup-list{margin:0;padding:.35rem 0;list-style:none;overflow-y:auto;flex:1;min-height:0}.chat-participant-popup-item{padding:.4rem 1rem;font-size:.9rem;color:#1f2b2d;border-bottom:1px solid transparent}.chat-participant-popup-item:last-child{border-bottom:none}.chat-messages{flex:1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:.75rem}.chat-messages-empty{margin:0;font-size:.9rem;color:var(--text-subtle, 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1rem;font-size:.9rem;font-weight:500;color:#fff;background:var(--chat-accent);border:none;border-radius:10px;cursor:pointer}.chat-send-btn:hover:not(:disabled){filter:brightness(1.08)}.chat-send-btn:disabled{opacity:.6;cursor:not-allowed}