#shikumin-chat { display:flex; gap:20px; }
#shikumin-chat .left { width:60%; }
#shikumin-chat .right { width:40%; background:#fafafa; padding:10px; }
#chat-log { height:300px; overflow:auto; border:1px solid #ddd; padding:10px; }
#chat-log .user { text-align:right; margin:5px 0; }
#chat-log .ai { text-align:left; margin:5px 0; }