.excel-gpt-chat { border:1px solid #ddd; padding:12px; max-width:820px; background:#fff; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial; }
.ega-header { font-size:16px; margin-bottom:8px; }
.ega-conversation { height:360px; overflow:auto; border:1px solid #f0f0f0; padding:8px; background:#fafafa; margin-bottom:8px;}
.ega-message { margin-bottom:10px; padding:8px; border-radius:6px; max-width:100%; box-sizing:border-box; }
.ega-user { background:#e8f4ff; text-align:right; }
.ega-assistant { background:#fff; border:1px solid #eee; text-align:left; }
.ega-message pre { white-space:pre-wrap; word-break:break-word; background:#f6f6f6; padding:8px; border-radius:4px; overflow:auto; }
.ega-copy { margin-top:6px; display:inline-block; }
.ega-form textarea { width:100%; min-height:70px; padding:8px; box-sizing:border-box; }