:root{--bg:#f6f5f1;--fg:#1c1c1a;--muted:#6b6a64;--card:#fff;--user:#1f4d3a;--user-fg:#fff;--line:#e2e0d8;--accent:#1f4d3a}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--fg);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}.neutral{max-width:32rem;margin:15vh auto;padding:0 1rem}.chat{flex-direction:column;max-width:40rem;height:100dvh;margin:0 auto;padding:0 .75rem;display:flex}.chat-head{border-bottom:1px solid var(--line);padding:1rem 0 .5rem}.chat-head h1{margin:0;font-size:1.15rem}.chat-head p{color:var(--muted);margin:.25rem 0 0;font-size:.9rem}.chat-log{flex-direction:column;flex:1;gap:.6rem;padding:1rem 0;display:flex;overflow-y:auto}.bubble{white-space:pre-wrap;overflow-wrap:anywhere;border-radius:1rem;max-width:88%;padding:.65rem .85rem;font-size:1rem}.bubble.assistant{background:var(--card);border:1px solid var(--line);border-bottom-left-radius:.3rem;align-self:flex-start}.bubble.user{background:var(--user);color:var(--user-fg);border-bottom-right-radius:.3rem;align-self:flex-end}.typing{color:var(--muted)}.done{text-align:center;color:var(--muted);margin:1rem 0}.error{color:#9b2c1f;margin:0 0 .5rem;font-size:.9rem}.chat-form{padding:.5rem 0 max(.75rem, env(safe-area-inset-bottom));border-top:1px solid var(--line);gap:.5rem;display:flex}.chat-form textarea{resize:none;border:1px solid var(--line);font:inherit;background:var(--card);color:inherit;border-radius:.75rem;flex:1;padding:.6rem .75rem}.chat-form button{background:var(--accent);color:#fff;font:inherit;cursor:pointer;border:0;border-radius:.75rem;padding:0 1.1rem;font-weight:600}.chat-form button:disabled{opacity:.5;cursor:default}@media (prefers-color-scheme:dark){:root{--bg:#161614;--fg:#ecebe6;--muted:#9c9b93;--card:#222220;--line:#34332f;--user:#2f7a5a}}