:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f5f7f8;--panel:#fff;--text:#172026;--muted:#63707a;--line:#d8e0e5;--accent:#157f76;--accent-strong:#0e625b;--danger:#b3261e;--soft:#e8f4f2}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:Arial,Helvetica,sans-serif}button,input,textarea{font:inherit}button{background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:6px;justify-content:center;align-items:center;min-height:42px;padding:0 18px;font-weight:700;display:inline-flex}button:hover{background:var(--accent-strong)}button:disabled{cursor:not-allowed;opacity:.55}input,textarea{border:1px solid var(--line);color:var(--text);background:#fff;border-radius:6px;outline:none;width:100%;padding:12px}input:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #157f7624}.auth-shell{place-items:center;min-height:100vh;padding:24px;display:grid}.auth-panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;gap:24px;width:100%;max-width:420px;padding:28px;display:grid;box-shadow:0 16px 40px #17202614}.eyebrow{color:var(--accent-strong);letter-spacing:0;text-transform:uppercase;margin:0 0 8px;font-size:12px;font-weight:800}h1,h2,p{margin-top:0}h1{margin-bottom:8px;font-size:30px;line-height:1.08}h2{font-size:16px}.muted{color:var(--muted);line-height:1.45}.login-form{gap:16px;display:grid}.login-form label{color:var(--muted);gap:8px;font-size:14px;font-weight:700;display:grid}.form-error,.chat-error{color:var(--danger);margin:0;font-weight:700}.form-note{color:var(--muted);margin:0;line-height:1.45}.chat-shell{grid-template-rows:auto 1fr auto;gap:16px;height:100vh;padding:18px;display:grid}.topbar{background:var(--panel);border:1px solid var(--line);border-radius:8px;justify-content:space-between;align-items:center;min-height:80px;padding:16px 18px;display:flex}.topbar h1{margin-bottom:0;font-size:24px}.staff-block{color:var(--muted);align-items:center;gap:12px;font-size:14px;display:flex}.secondary-button{color:var(--text);background:#eef3f4}.secondary-button:hover{background:#dfe8ea}.workspace{grid-template-columns:minmax(0,1fr) 320px;gap:16px;min-height:0;display:grid}.conversation,.sources-panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;min-height:0;overflow:auto}.conversation{flex-direction:column;gap:14px;padding:18px;display:flex}.message{border:1px solid var(--line);border-radius:8px;max-width:860px;padding:12px 14px}.message span{color:var(--muted);text-transform:uppercase;margin-bottom:6px;font-size:12px;font-weight:800;display:block}.message p{white-space:pre-wrap;margin-bottom:0;line-height:1.5}.message.user{background:var(--soft);align-self:flex-end}.message.assistant{background:#fff;align-self:flex-start}.sources-panel{padding:16px}.sources-panel ul{gap:12px;margin:0;padding:0;list-style:none;display:grid}.sources-panel li{border-bottom:1px solid var(--line);gap:4px;padding-bottom:12px;display:grid}.sources-panel a{color:var(--accent-strong);font-weight:800}.sources-panel span,.sources-panel small{color:var(--muted)}.composer{background:var(--panel);border:1px solid var(--line);border-radius:8px;grid-template-columns:minmax(0,1fr) 92px;align-items:stretch;gap:12px;padding:12px;display:grid}.composer textarea{resize:vertical;min-height:72px}@media (max-width:860px){.chat-shell{height:auto;min-height:100vh}.topbar,.staff-block{flex-direction:column;align-items:flex-start}.workspace,.composer{grid-template-columns:1fr}.sources-panel{max-height:260px}}