:root{--bg: #0f172a;--panel: #1e293b;--panel-alt: #334155;--text: #e2e8f0;--muted: #94a3b8;--accent: #2563eb;--accent-hover: #1d4ed8;--error: #f87171;--user: #1d4ed8;--assistant: #334155;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}.app{min-height:100vh;display:flex;align-items:stretch;justify-content:center;padding:1.5rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}.signin{width:100%;max-width:380px;margin:auto;background:var(--panel);padding:2rem;border-radius:12px}.signin h1{margin:0 0 .25rem;font-size:1.35rem}.signin-subtitle{margin:0 0 1.5rem;color:var(--muted)}.field{display:flex;flex-direction:column;margin-bottom:1rem}.field label{margin-bottom:.35rem;font-size:.85rem;color:var(--muted)}.field input{padding:.6rem .7rem;border-radius:8px;border:1px solid var(--panel-alt);background:var(--bg);color:var(--text);font-size:.95rem}button{cursor:pointer;border:none;border-radius:8px;background:var(--accent);color:#fff;padding:.6rem 1rem;font-size:.95rem}button:hover:not(:disabled){background:var(--accent-hover)}button:disabled{opacity:.6;cursor:not-allowed}.signin button{width:100%;margin-top:.5rem}.signin-error,.chat-error{color:var(--error);font-size:.9rem;margin:.5rem 0}.chat{width:100%;max-width:720px;margin:auto;display:flex;flex-direction:column;background:var(--panel);border-radius:12px;overflow:hidden;height:min(80vh,720px)}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;border-bottom:1px solid var(--panel-alt)}.chat-header h1{margin:0;font-size:1.15rem}.signout{background:transparent;border:1px solid var(--panel-alt);color:var(--muted);padding:.4rem .8rem}.signout:hover:not(:disabled){background:var(--panel-alt)}.escalation-banner{margin:0;padding:.6rem 1.25rem;background:#78350f;color:#fde68a;font-size:.9rem}.transcript{flex:1;overflow-y:auto;padding:1.25rem;display:flex;flex-direction:column;gap:1rem}.turn{padding:.75rem 1rem;border-radius:10px;max-width:85%}.turn-role{display:block;font-size:.7rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:.3rem}.turn-text{margin:0;white-space:pre-wrap;line-height:1.4}.turn-user{align-self:flex-end;background:var(--user)}.turn-user .turn-role{color:#bfdbfe}.turn-assistant{align-self:flex-start;background:var(--assistant)}.turn-error{align-self:flex-start;background:#7f1d1d}.turn-agents,.turn-ticket,.turn-escalated{margin:.5rem 0 0;font-size:.8rem;color:var(--muted)}.turn-escalated{color:#fbbf24}.turn-sources{margin-top:.6rem;font-size:.8rem}.turn-sources-label{display:block;color:var(--muted);margin-bottom:.2rem}.turn-sources ul{margin:0;padding-left:1.1rem}.composer{display:flex;gap:.6rem;padding:1rem 1.25rem;border-top:1px solid var(--panel-alt)}.composer textarea{flex:1;resize:none;padding:.6rem .7rem;border-radius:8px;border:1px solid var(--panel-alt);background:var(--bg);color:var(--text);font-family:inherit;font-size:.95rem}.composer button{align-self:flex-end}