*{box-sizing:border-box} body{margin:0;font-family:Inter,Arial,sans-serif;background:#fff;color:#171717}.app{display:flex;height:100vh}.sidebar{width:280px;background:#f7f7f8;border-right:1px solid #e5e5e5;padding:18px;display:flex;flex-direction:column;gap:16px}.brand{font-weight:700;font-size:18px}.newchat{border:1px solid #ddd;background:white;border-radius:10px;padding:12px;text-align:left;cursor:pointer}.small{font-size:13px;color:#666;line-height:1.4;margin-top:auto}.chat{flex:1;display:flex;flex-direction:column;background:#fff}.topbar{height:58px;border-bottom:1px solid #eee;display:flex;align-items:center;gap:12px;padding:0 22px}.topbar span{font-size:13px;color:#777}.messages{flex:1;overflow:auto;padding:28px 16px 120px;max-width:900px;width:100%;margin:0 auto}.msg{display:flex;gap:12px;margin:18px 0;align-items:flex-start}.msg.user{flex-direction:row-reverse}.avatar{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;background:#10a37f;color:white;flex:none}.user .avatar{background:#ececec;color:#333}.bubble{line-height:1.55;white-space:pre-wrap;background:#f7f7f8;padding:14px 16px;border-radius:16px;max-width:720px}.user .bubble{background:#e8f0fe}.suggestions{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin:20px 46px}.suggestions button{border:1px solid #e4e4e4;background:#fff;border-radius:14px;padding:14px;text-align:left;cursor:pointer}.composer{position:fixed;bottom:0;left:280px;right:0;background:linear-gradient(transparent,#fff 30%);padding:28px 20px}.composer{display:flex;justify-content:center;gap:10px}.composer textarea{width:min(820px,100%);resize:none;border:1px solid #ddd;border-radius:18px;padding:15px 18px;font-size:15px;outline:none;max-height:140px}.composer button{width:48px;height:48px;border-radius:50%;border:0;background:#10a37f;color:white;font-size:18px;cursor:pointer}@media(max-width:760px){.sidebar{display:none}.composer{left:0}.messages{padding:18px 12px 110px}.bubble{max-width:calc(100vw - 90px)}}