*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;background:#f6f8fb;color:#0b172a}a{color:#123b78;text-decoration:none}input,select,textarea,button{font:inherit}label{display:grid;gap:6px;margin:12px 0}input,select,textarea{width:100%;border:1px solid #ccd6e4;border-radius:8px;padding:12px;background:#fff}.container{max-width:1100px;margin:0 auto;padding:20px}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;background:#061a3a;color:#fff}.topbar a{color:#fff;margin-left:14px}.brand{font-weight:800}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid #c6d2e3;border-radius:8px;padding:10px 14px;background:#fff;color:#061a3a;cursor:pointer}.btn.primary{background:#0d47a1;color:#fff;border-color:#0d47a1}.panel{max-width:520px;margin:32px auto;background:#fff;border:1px solid #e1e8f2;border-radius:8px;padding:20px}.alert{background:#fff8df;border:1px solid #f3d98b;border-radius:8px;padding:12px;margin-bottom:12px}.hero{min-height:70vh;display:flex;align-items:center;background:#061a3a;color:#fff;border-radius:0;padding:40px}.hero h1{font-size:clamp(32px,6vw,64px);line-height:1;margin:10px 0}.hero p{max-width:620px;color:#dbe7ff}.eyebrow{font-weight:700;text-transform:uppercase;letter-spacing:0}.actions{display:flex;gap:12px;flex-wrap:wrap}.tabs{display:flex;gap:12px;margin-bottom:16px}.chat-shell{display:grid;grid-template-columns:280px 1fr;gap:16px}.conversation-list,.thread{background:#fff;border:1px solid #e1e8f2;border-radius:8px;min-height:70vh}.messages{padding:16px;display:grid;gap:8px}.composer{display:grid;grid-template-columns:140px 1fr auto;gap:8px;padding:12px;border-top:1px solid #e1e8f2}.typing{padding:0 16px;color:#52637a}@media(max-width:760px){.topbar{display:block}.topbar nav{margin-top:10px}.chat-shell{grid-template-columns:1fr}.conversation-list{min-height:120px}.composer{grid-template-columns:1fr}.hero{margin:-20px;padding:28px;min-height:78vh}}