:root{--bg:#f4f6f8;--panel:#fff;--ink:#1d2b36;--muted:#5b6b79;--accent:#0d6e8a;--accent-2:#f2a900;--border:#d8e0e6}*{box-sizing:border-box}body{color:var(--ink);background:radial-gradient(circle at 20% 0%, #eaf4ff 0%, transparent 40%), radial-gradient(circle at 100% 100%, #fff1d8 0%, transparent 50%), var(--bg);margin:0;font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}main{grid-template-columns:320px 1fr;gap:20px;min-height:100vh;padding:24px;display:grid}.card{background:var(--panel);border:1px solid var(--border);border-radius:14px;box-shadow:0 4px 14px #14233214}.sidebar{flex-direction:column;gap:12px;padding:16px;display:flex}.sidebar h1{margin:0;font-size:20px}.sidebar p{color:var(--muted);margin:0;font-size:14px}label{color:var(--muted);margin-bottom:4px;font-size:12px;display:block}input,textarea,button{width:100%;font:inherit}input,textarea{border:1px solid var(--border);background:#fff;border-radius:10px;padding:10px}button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:10px;padding:10px 12px;font-weight:600}button.secondary{background:#445766}.chat{flex-direction:column;min-height:calc(100vh - 48px);padding:0;display:flex}.chat-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:14px 16px;display:flex}.messages{flex-direction:column;flex:1;gap:10px;padding:16px;display:flex;overflow:auto}.msg{white-space:pre-wrap;border-radius:12px;max-width:80%;padding:10px 12px;line-height:1.4}.msg.user{background:#dff4ff;border:1px solid #b7e6ff;align-self:flex-end}.msg.bot{background:#fff8e7;border:1px solid #ffe0a4;align-self:flex-start}.composer{border-top:1px solid var(--border);grid-template-columns:1fr auto;gap:8px;padding:12px;display:grid}.status{color:var(--muted);font-size:12px}@media (max-width:900px){main{grid-template-columns:1fr}.chat{min-height:60vh}}