*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#0f1115;color:#e6e6e6}.chat-container{display:flex;flex-direction:column;height:100vh;max-width:720px;margin:0 auto}.chat-messages{flex:1 1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}.message{padding:10px 14px;border-radius:12px;max-width:80%;white-space:pre-wrap;line-height:1.4}.message.user{align-self:flex-end;background:#2563eb;color:#fff}.message.assistant{align-self:flex-start;background:#1f2430;color:#e6e6e6}.chat-input-bar{display:flex;gap:8px;padding:16px;border-top:1px solid #262a35}.chat-input-bar textarea{flex:1 1;resize:none;border-radius:10px;border:1px solid #333;background:#1a1d24;color:#e6e6e6;padding:10px 12px;font-size:14px;font-family:inherit}.chat-input-bar button{border:none;border-radius:10px;background:#2563eb;color:#fff;padding:0 20px;cursor:pointer;font-size:14px}.chat-input-bar button:disabled{background:#444;cursor:not-allowed}