:root{--bg:#0f1724;--panel:#0b1220;--muted:#9aa6b2;--accent:#4f46e5;--text:#e6eef6}*{box-sizing:border-box}body,html,#root{height:100%;margin:0;font-family:Inter,ui-sans-serif,system-ui,Segoe UI,Roboto,Helvetica Neue,Arial}body{background:linear-gradient(180deg,#071226,#071a2a);color:var(--text)}.app-root{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--panel);padding:20px;display:flex;flex-direction:column;gap:12px}.brand{font-weight:700;font-size:18px;color:var(--accent)}.nav-item{display:block;padding:10px 12px;border-radius:8px;color:var(--muted);margin:6px 0;text-decoration:none}.nav-item.active{background:#4f46e51f;color:var(--text)}.app-main{flex:1;padding:28px}.page h1{margin:0 0 12px}.chat-form textarea{width:100%;min-height:120px;padding:12px;border-radius:8px;border:1px solid rgba(255,255,255,.04);background:transparent;color:var(--text);resize:vertical}.actions{margin-top:8px}button{background:var(--accent);border:none;color:#fff;padding:8px 12px;border-radius:8px;cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}.chat-result{margin-top:18px}.reply{background:#ffffff08;padding:12px;border-radius:8px}.error{color:#ffb4b4}