:root{--bg:#f4f6fb;--panel:#ffffff;--line:#e6e9ef;--text:#162033;--muted:#6b7280;--nav:#0f172a;--nav2:#111827;--primary:#2563eb;--primary-soft:#eff6ff;--ok:#16a34a;--ok-soft:#ecfdf5;--warn:#d97706;--warn-soft:#fff7ed;--danger:#dc2626;--shadow:0 8px 28px rgba(15,23,42,.07);--radius:14px}*{box-sizing:border-box}body,html{padding:0;margin:0}body{font-family:Segoe UI,Tahoma,Arial,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}button,input,select,textarea{font:inherit}a{color:var(--primary)}.app{display:grid;grid-template-columns:260px 1fr;min-height:100vh}.sidebar{background:linear-gradient(180deg,var(--nav),var(--nav2));color:#fff;padding:20px 14px;position:-webkit-sticky;position:sticky;top:0;height:100vh;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:10px}.logo{width:38px;height:38px;border-radius:12px;font-weight:800;background:linear-gradient(135deg,#2563eb,#7c3aed);display:grid;place-items:center}.brand b{font-size:20px}.sub{color:#94a3b8;font-size:12px;margin:4px 0 18px}.navbtn{display:block;width:100%;border:0;background:transparent;color:#cbd5e1;padding:10px 12px;border-radius:10px;margin:3px 0;cursor:pointer;text-align:right;text-decoration:none;font-size:14px}.navbtn.active,.navbtn:hover{background:#1e293b;color:#fff}.navsec{font-size:11px;color:#64748b;margin:16px 10px 6px}.userbox{margin-top:auto;border-top:1px solid #263244;padding-top:12px;display:flex;gap:10px;align-items:center}.avatar{width:34px;height:34px;border-radius:50%;background:#334155;display:grid;place-items:center}.userbox small{color:#94a3b8;display:block}.main{min-width:0;display:flex;flex-direction:column}.content{padding:22px;max-width:1100px;margin:0 auto;width:100%}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}.head{margin-bottom:16px}.head h1{font-size:24px;margin:0}.head p{margin:6px 0 0;color:var(--muted);font-size:14px}.btn{border:0;border-radius:10px;padding:9px 14px;cursor:pointer;font-weight:600}.btn.primary{background:var(--primary);color:#fff}.btn.ghost{background:#f8fafc;color:#475569;border:1px solid var(--line)}.btn.danger{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}.btn:disabled{opacity:.5;cursor:default}.input{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;outline:none;background:#fff}.input:focus{border-color:#93c5fd;box-shadow:0 0 0 3px #dbeafe}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.muted{color:var(--muted);font-size:13px}.badge{font-size:11px;border-radius:999px;padding:4px 9px;white-space:nowrap}.badge.ok{background:var(--ok-soft);color:#166534}.badge.warn{background:var(--warn-soft);color:#9a3412}.badge.info{background:var(--primary-soft);color:#1d4ed8}table{width:100%;border-collapse:collapse;font-size:13px}td,th{padding:10px;border-bottom:1px solid var(--line);text-align:right}th{background:#f8fafc;color:#475569;font-weight:600}.error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca;border-radius:10px}.error,.notice{padding:10px;font-size:14px}.notice{background:var(--ok-soft);color:#166534;border:1px solid #bbf7d0;border-radius:10px}.chat{display:flex;flex-direction:column;height:calc(100vh - 44px)}.messages{flex:1 1;overflow-y:auto;padding:4px}.msg{max-width:86%;padding:12px 14px;border-radius:14px;margin:10px 0;line-height:1.7;font-size:15px;white-space:pre-wrap}.msg.user{margin-right:auto;background:#eaf2ff;border-bottom-left-radius:4px}.msg.ai{margin-left:auto;background:#fff;border:1px solid var(--line);border-bottom-right-radius:4px}.msg .meta{font-size:11px;color:var(--muted);margin-bottom:6px}.sources{margin-top:12px;border-top:1px dashed var(--line);padding-top:10px}.sources b{font-size:12px;color:var(--muted)}.source{font-size:12px;background:#f8fafc;border:1px solid var(--line);border-radius:9px;padding:8px 10px;margin-top:6px}.source .name{color:#1d4ed8;font-weight:600}.source .excerpt{color:var(--muted);margin-top:4px;max-height:3.4em;overflow:hidden}.composer{border-top:1px solid var(--line);padding-top:12px;display:grid;grid-template-columns:1fr auto;grid-gap:8px;gap:8px}.composer textarea{min-height:62px;resize:none;border:1px solid var(--line);border-radius:12px;padding:12px;outline:none}.composer textarea:focus{border-color:#93c5fd;box-shadow:0 0 0 3px #dbeafe}.empty{color:var(--muted);text-align:center;padding:40px 20px}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:20px}.login-box{width:min(420px,100%)}.login-box .card{padding:26px}.login-box h1{margin:0 0 4px;font-size:22px}.field{margin-top:14px}.field label{color:var(--muted);margin-bottom:6px}.conv,.field label{display:block;font-size:13px}.conv{width:100%;text-align:right;border:0;background:transparent;color:#cbd5e1;padding:8px 10px;border-radius:8px;cursor:pointer;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv.active,.conv:hover{background:#1e293b;color:#fff}@media (max-width:900px){.app{grid-template-columns:1fr}.sidebar{position:relative;height:auto}.chat{height:auto;min-height:70vh}}