:root{--bg:#f5f7f9;--surface:#fff;--border:#dfe5ea;--text:#1c2733;--text-muted:#5b6b7b;--primary:#1f5c8b;--primary-dark:#174766;--accent:#2e7d5b;--danger:#b3261e;--warning:#8a5a00;--radius:8px;--shadow:0 1px 3px rgba(16,24,40,.08);--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:15px;line-height:1.5}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.layout{display:flex;min-height:100vh}.sidebar{width:232px;background:var(--surface);border-right:1px solid var(--border);padding:20px 14px;flex-shrink:0}.sidebar .brand{gap:10px;font-weight:650;font-size:17px;padding:4px 10px 18px}.brand-mark,.sidebar .brand{display:flex;align-items:center}.brand-mark{width:28px;height:28px;border-radius:7px;background:var(--primary);color:#fff;justify-content:center;font-size:14px}.nav-item{display:block;padding:8px 10px;border-radius:6px;color:var(--text);margin-bottom:2px;font-weight:500}.nav-item:hover{background:#eef2f5;text-decoration:none}.nav-item.active{background:#e3edf5;color:var(--primary-dark)}.main{flex:1 1;padding:28px 36px;max-width:1100px}h1{font-size:22px;margin:0 0 4px}h2{font-size:17px;margin:24px 0 12px}.sub{color:var(--text-muted);margin:0 0 20px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:16px}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));grid-gap:14px;gap:14px}.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.stat .label{color:var(--text-muted);font-size:13px}.stat .value{font-size:24px;font-weight:650;margin-top:4px}table{width:100%;border-collapse:collapse;font-size:14px}td,th{text-align:left;padding:9px 10px;border-bottom:1px solid var(--border)}th{color:var(--text-muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.03em}button{font-family:var(--font);font-size:14px;border-radius:6px;border:1px solid var(--border);background:var(--surface);color:var(--text);padding:8px 14px;cursor:pointer;transition:background .15s}button:hover{background:#eef2f5}button.primary{background:var(--primary);border-color:var(--primary);color:#fff}button.primary:hover{background:var(--primary-dark)}button:disabled{opacity:.55;cursor:not-allowed}button.danger{border-color:#f0c4c1;color:var(--danger)}input,select,textarea{font-family:var(--font);font-size:14px;padding:8px 10px;border:1px solid var(--border);border-radius:6px;background:#fff;color:var(--text);width:100%}label{display:block;font-size:13px;color:var(--text-muted);margin:10px 0 4px}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;font-weight:600}.badge.ready{background:#e3f2e9;color:var(--accent)}.badge.failed{background:#fdecea;color:var(--danger)}.badge.pending{background:#fff4dc;color:var(--warning)}.badge.low{background:#e3edf5;color:var(--primary)}.badge.medium{background:#fff4dc;color:var(--warning)}.badge.high{background:#fdecea;color:var(--danger)}.chat-window{display:flex;flex-direction:column;height:calc(100vh - 120px);max-height:720px}.chat-messages{flex:1 1;overflow-y:auto;padding:8px 2px 16px}.message{margin-bottom:16px}.message.user{text-align:right}.message .bubble{display:inline-block;text-align:left;max-width:78%;padding:10px 14px;border-radius:10px;border:1px solid var(--border);background:var(--surface);white-space:pre-wrap}.message.user .bubble{background:var(--primary);border-color:var(--primary);color:#fff}.citations{margin-top:10px}.citation{border:1px solid var(--border);border-left:3px solid var(--primary);background:var(--surface);border-radius:6px;padding:8px 12px;margin-top:8px;font-size:13px}.citation .name{font-weight:600}.citation .excerpt{color:var(--text-muted);margin-top:4px}.confidence{font-size:12px;color:var(--text-muted);margin-top:6px}.actions{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap}.chat-input{display:flex;gap:10px}.chat-input input{flex:1 1}.feedback{display:inline-flex;gap:6px;margin-top:8px}.feedback button{padding:3px 10px;font-size:13px}.alert{padding:10px 14px;border-radius:6px;margin:8px 0;font-size:14px}.alert.info{background:#e3edf5;color:var(--primary-dark)}.alert.error{background:#fdecea;color:var(--danger)}.muted{color:var(--text-muted)}.small{font-size:13px}.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:18px}.tabs button{background:none;border-radius:0;padding:8px 14px;border:none;border-bottom:2px solid transparent}.tabs button.active{border-bottom-color:var(--primary);color:var(--primary);font-weight:600}.auth-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#eef4f8,#f5f7f9)}.auth-box{width:360px}