:root{--navy:#0d2338;--blue:#176b9b;--cyan:#1bb6b2;--bg:#f3f6f8;--card:#fff;--text:#172635;--muted:#647482;--line:#dce4ea;--danger:#bd3434}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}button,input,textarea,select{font:inherit}.login{min-height:100vh;display:grid;place-items:center;background:linear-gradient(140deg,#081a2b,#164d68)}.login-card{width:min(420px,92vw);background:#fff;padding:38px;border-radius:18px;box-shadow:0 24px 70px #0005}.brand{display:flex;gap:12px;align-items:center;font-weight:800;font-size:22px}.logo{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(140deg,var(--cyan),var(--blue));color:#fff}.login-card h1{margin:28px 0 6px}.login-card p{color:var(--muted);margin-top:0}.field{display:grid;gap:7px;margin:16px 0}.field input,.field textarea,.field select{border:1px solid var(--line);border-radius:10px;padding:12px;background:#fff}.btn{border:0;border-radius:10px;padding:11px 16px;cursor:pointer;background:var(--blue);color:#fff;font-weight:700}.btn.secondary{background:#e6eef3;color:var(--navy)}.btn.danger{background:var(--danger)}.btn:disabled{opacity:.6}.error{color:var(--danger);min-height:22px}.shell{height:100vh;display:grid;grid-template-columns:250px 1fr}.sidebar{background:var(--navy);color:#fff;padding:24px 18px;display:flex;flex-direction:column}.sidebar nav{display:grid;gap:7px;margin-top:30px}.sidebar a{color:#cad7df;text-decoration:none;padding:12px;border-radius:9px}.sidebar a:hover,.sidebar a.active{background:#ffffff18;color:#fff}.sidebar .bottom{margin-top:auto}.main{display:flex;flex-direction:column;min-width:0}.topbar{height:72px;background:#fff;border-bottom:1px solid var(--line);padding:0 28px;display:flex;align-items:center;justify-content:space-between}.status{display:flex;align-items:center;gap:8px;color:#38785e}.dot{width:9px;height:9px;border-radius:50%;background:#31b978}.content{padding:25px;overflow:auto}.chat-wrap{height:calc(100vh - 122px);max-width:1000px;margin:auto;display:flex;flex-direction:column}.messages{flex:1;overflow:auto;padding:6px}.message{max-width:82%;padding:14px 16px;border-radius:14px;margin:10px 0;line-height:1.5;white-space:pre-wrap}.message.user{margin-left:auto;background:var(--blue);color:#fff}.message.assistant{background:#fff;border:1px solid var(--line)}.composer{display:flex;gap:10px;background:#fff;border:1px solid var(--line);padding:10px;border-radius:15px;box-shadow:0 7px 22px #17324d12}.composer textarea{flex:1;border:0;resize:none;padding:9px;outline:0;min-height:42px}.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:18px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.table{width:100%;border-collapse:collapse}.table th,.table td{text-align:left;padding:11px;border-bottom:1px solid var(--line)}.muted{color:var(--muted)}.result{margin-top:16px;padding:15px;border-radius:10px;background:#e9f6f5}.feedback{margin-top:10px}.feedback button{border:0;background:transparent;cursor:pointer}@media(max-width:760px){.shell{grid-template-columns:1fr}.sidebar{display:none}.topbar{padding:0 15px}.content{padding:12px}.message{max-width:94%}}