:root{--yellow: #fcdb00;--blue: #0061a5;--blue-dark: #004a7f;--bg: #f4f7fa;--text: #17222d;--muted: #667785;--border: #d9e2ea;--danger: #c0392b}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--blue)}.app{min-height:100vh;display:flex;flex-direction:column}main{flex:1;width:100%;max-width:1100px;margin:0 auto;padding:16px;display:flex;flex-direction:column;min-height:0}.topbar{display:flex;align-items:center;gap:24px;padding:10px 24px;background:var(--blue);color:#fff;border-bottom:4px solid var(--yellow);flex-wrap:wrap}.topbar a{color:#fff;text-decoration:none;opacity:.85}.topbar a:hover,.topbar a.active{opacity:1;color:var(--yellow)}.topbar nav,.topbar .user{display:flex;gap:16px;align-items:center}.brand{display:flex;align-items:center;gap:10px;font-size:1.3rem;font-weight:700;opacity:1!important}.spacer{flex:1}.btn{background:var(--yellow);color:#111;border:0;border-radius:8px;padding:10px 16px;font-weight:600;cursor:pointer;display:inline-flex;gap:8px;align-items:center;justify-content:center}.btn:hover:not(:disabled){filter:brightness(.95)}.btn:disabled{opacity:.5;cursor:default}.btn.ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5)}.icon{background:none;border:0;color:var(--danger);cursor:pointer}.card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:24px;display:flex;flex-direction:column;gap:12px}.card h1{margin:0 0 4px;font-size:1.4rem;color:var(--blue)}label{display:flex;flex-direction:column;gap:4px;font-size:.9rem;color:var(--muted)}input,select,textarea{font:inherit;padding:10px 12px;border:1px solid var(--border);border-radius:8px;color:var(--text);background:#fff}input:focus,select:focus,textarea:focus{outline:2px solid var(--blue);border-color:transparent}.auth{max-width:380px;margin:40px auto}.error{color:var(--danger);margin:0}.muted{color:var(--muted)}.center{text-align:center;margin-top:40px}.chat-layout{flex:1;display:flex;gap:16px;min-height:0;height:calc(100vh - 100px)}.sidebar{width:240px;display:flex;flex-direction:column;gap:12px;overflow-y:auto}.sidebar ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}.sidebar li button{width:100%;text-align:left;background:#fff;border:1px solid var(--border);border-radius:8px;padding:8px 10px;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar li button.active{border-color:var(--blue);background:#e8f2fa}.chat{flex:1;display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);border-radius:12px;min-width:0}.notice{margin:0;padding:10px 16px;background:#fff9d6;border-bottom:1px solid var(--yellow);border-radius:12px 12px 0 0;font-size:.9rem}.messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px}.msg{max-width:75%;padding:10px 14px;border-radius:14px;white-space:pre-wrap}.msg p{margin:0}.msg.user{align-self:flex-end;background:var(--blue);color:#fff;border-bottom-right-radius:4px}.msg.assistant{align-self:flex-start;background:#eef2f6;border-bottom-left-radius:4px}.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:6px;margin-top:8px}.gallery img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:8px}.composer{display:flex;gap:8px;padding:12px;border-top:1px solid var(--border)}.composer input{flex:1}.knowledge{display:grid;grid-template-columns:360px 1fr;gap:16px;align-items:start}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:8px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:500;font-size:.85rem}@media (max-width: 720px){.sidebar{display:none}.knowledge{grid-template-columns:1fr}.msg{max-width:90%}}