:root{color-scheme:dark;--bg:#0b1220;--panel:#121d2e;--line:#26364c;--text:#edf3fb;--muted:#9aabc0;--accent:#70d6a2}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,-apple-system,Segoe UI,sans-serif}.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px max(18px,calc((100% - 900px)/2));border-bottom:1px solid var(--line);background:#101827;position:sticky;top:0}.topbar strong{display:block;letter-spacing:.04em}.topbar small{color:var(--muted)}main{width:min(900px,calc(100% - 28px));margin:36px auto}.intro{padding:12px 0 22px}.eyebrow{color:var(--accent);font-size:.75rem;font-weight:700;letter-spacing:.14em}.intro h1{font-size:clamp(2rem,7vw,3.2rem);line-height:1.1;margin:.3em 0}.intro p,.hint{color:var(--muted)}.toolbar{display:flex;justify-content:space-between;align-items:end;gap:12px;flex-wrap:wrap;padding:16px;background:var(--panel);border:1px solid var(--line);border-radius:14px}label{display:grid;gap:6px;color:var(--muted);font-size:.9rem}input,select,textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:9px;background:#0b1423;color:var(--text);font:inherit}select{min-width:220px}.status{font-size:.82rem;color:var(--accent)}.chat{display:grid;gap:12px;min-height:220px;padding:20px 0}.message{max-width:85%;padding:14px 16px;border:1px solid var(--line);border-radius:13px;background:var(--panel);overflow-wrap:anywhere}.message.user{justify-self:end;background:#17352e}.message p{margin:.4em 0 0;white-space:pre-wrap}.composer{display:flex;gap:10px;align-items:stretch}.composer textarea{resize:vertical;min-height:54px}button{border:0;border-radius:9px;padding:11px 17px;background:var(--accent);color:#092016;font-weight:700;font-size:1rem;cursor:pointer}button.secondary{background:#263449;color:var(--text)}.hint{font-size:.82rem}.warning{color:#e9c58a;font-size:.82rem}.dialog-head,.actions{display:flex;align-items:center;justify-content:space-between;gap:10px}.dialog-head h2{font-size:1.25rem}dialog{width:min(540px,calc(100% - 24px));border:1px solid var(--line);border-radius:16px;background:var(--panel);color:var(--text);padding:20px}dialog::backdrop{background:#000b}#settingsForm{display:grid;gap:14px}.check{display:flex;align-items:center;gap:8px}.check input{width:auto}.actions{justify-content:flex-end;flex-wrap:wrap}@media(max-width:560px){main{margin:22px auto}.topbar{padding:12px 14px}.composer{flex-direction:column}.composer button{width:100%}.message{max-width:96%}}