:root{--bg: #f6f5f1;--card: #ffffff;--ink: #16181d;--muted: #6b6f78;--line: #e2e0d8;--brand: #14213d;--accent: #c8102e;--user: #14213d;--userInk: #ffffff;color-scheme:light dark}@media (prefers-color-scheme: dark){:root{--bg: #111317;--card: #1a1d23;--ink: #eceae4;--muted: #9a9ea8;--line: #2b2f37;--brand: #9fb4e6;--user: #2a3a60;--userInk: #eef2ff}}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}button{font:inherit;cursor:pointer}a{color:var(--brand)}.top{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;padding-top:max(12px,env(safe-area-inset-top));border-bottom:1px solid var(--line);background:var(--card);position:sticky;top:0;z-index:5}.brand{font-weight:700;text-decoration:none;color:var(--ink)}.link{background:none;border:0;color:var(--brand);padding:4px}.btn{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:12px 18px;font-weight:600}.btn.dark{background:#000}.btn:disabled{opacity:.5}.muted{color:var(--muted)}.small{font-size:13px}.error{color:var(--accent)}.center{display:grid;place-items:center;min-height:60vh}.page{padding:16px;max-width:900px;margin:0 auto}.login{max-width:380px;margin:12vh auto;padding:16px;display:grid;gap:12px;text-align:center}.login h1{margin:0}.project{max-width:900px;margin:0 auto}.ptitle{padding:14px 16px 4px;font-size:20px;font-weight:700}.tabs{display:flex;gap:4px;padding:0 12px;border-bottom:1px solid var(--line);overflow-x:auto}.tabs a{padding:10px 12px;text-decoration:none;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap}.tabs a.active{color:var(--ink);border-color:var(--brand);font-weight:600}.disclaimer{font-size:13px;color:var(--muted);background:var(--card);border:1px solid var(--line);border-radius:8px;padding:8px 10px;margin:12px 0}.chat{padding:0 16px 16px;display:flex;flex-direction:column;min-height:calc(100vh - 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