:root{--ink:#1d2426;--muted:#5c6b70;--brand:#0f7c8a;--brand-dark:#0b5d68;--bg:#fbf8f3;--card:#ffffff;--line:#e6e0d6;--accent:#d97a2b;--bubble:#e9f4f6;--code:#f3efe8}
@media (prefers-color-scheme:dark){:root{--ink:#eef2f3;--muted:#a7b4b8;--brand:#4fc3d1;--brand-dark:#7ad6e1;--bg:#141a1c;--card:#1d2528;--line:#2c3639;--accent:#f0a05a;--bubble:#1f3338;--code:#182022}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--brand-dark)}a:hover{color:var(--brand)}
.wrap{max-width:900px;margin:0 auto;padding:0 20px}
header.site{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
header.site .logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:700;font-size:20px}
header.site .logo img{width:40px;height:40px;border-radius:10px}
header.site nav{display:flex;flex-wrap:wrap;gap:4px 18px}header.site nav a{text-decoration:none;color:var(--muted);font-size:15px}header.site nav a:hover{color:var(--brand)}
.hero{position:relative;padding:60px 0 36px;display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center}
.hero::before{content:"";position:absolute;inset:-40px -40vw 0;background:radial-gradient(60% 70% at 70% 20%,rgba(15,124,138,.12),transparent 70%);pointer-events:none;z-index:-1}
.hero h1{font-size:44px;line-height:1.1;margin:0 0 16px;letter-spacing:-.015em}
.hero p.lead{font-size:19px;color:var(--muted);margin:0 0 24px;max-width:34em}
.hero img{width:100%;max-width:320px;border-radius:32px;box-shadow:0 24px 60px rgba(0,0,0,.2);justify-self:end}
.btn{display:inline-block;background:var(--brand);color:#fff !important;text-decoration:none;padding:13px 22px;border-radius:12px;font-weight:600}
.btn:hover{background:var(--brand-dark)}
.btn.ghost{background:transparent;color:var(--brand-dark) !important;border:1px solid var(--line);margin-left:10px}
.stats{display:flex;gap:28px;flex-wrap:wrap;margin:22px 0 0;padding:0;list-style:none;color:var(--muted);font-size:14px}
.stats b{display:block;color:var(--ink);font-size:24px;line-height:1.2}
section{padding:40px 0;border-top:1px solid var(--line)}
section h2{font-size:28px;margin:0 0 8px;letter-spacing:-.01em}section p.sub{color:var(--muted);margin:0 0 22px;max-width:40em}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}
.card h3{margin:0 0 6px;font-size:17px}.card p{margin:0;color:var(--muted);font-size:15px}
.demo{display:grid;gap:22px}
.chat{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px 20px}
.chat .u{background:var(--bubble);border-radius:14px 14px 4px 14px;padding:10px 14px;margin:0 0 14px auto;max-width:85%;width:fit-content;font-size:15px}
.chat .b{font-size:15px}.chat .b p{margin:0 0 8px}.chat .b ol,.chat .b ul{margin:6px 0 8px;padding-left:22px}.chat .b li{margin:2px 0}
.chat .b table{border-collapse:collapse;font-size:14px;margin:6px 0 8px;width:100%}.chat .b td,.chat .b th{border-bottom:1px solid var(--line);padding:5px 8px;text-align:left}
.chat .b .note{color:var(--muted);font-size:13px}
.chat .cap{color:var(--muted);font-size:13px;margin-top:10px;border-top:1px solid var(--line);padding-top:8px}
.prompts{display:grid;gap:10px}
.prompts div{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px 16px;font-size:15px}
.prompts div::before{content:"→ ";color:var(--accent)}
figure{margin:18px 0 0}figure img{width:100%;border-radius:14px;border:1px solid var(--line)}
figcaption{color:var(--muted);font-size:14px;margin-top:8px}
details{border:1px solid var(--line);border-radius:12px;padding:10px 16px;margin:0 0 10px;background:var(--card)}
summary{cursor:pointer;font-weight:600}details p{margin:8px 0 4px;color:var(--muted);font-size:15px}
.legal h1{font-size:34px;margin:40px 0 6px}.legal .updated{color:var(--muted);margin:0 0 26px}
.legal h2{font-size:21px;margin:30px 0 10px}.legal h3{font-size:17px;margin:20px 0 6px}.legal p,.legal li{font-size:16px}
.legal table{border-collapse:collapse;width:100%;font-size:15px}.legal td,.legal th{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
footer{padding:30px 0 40px;border-top:1px solid var(--line);color:var(--muted);font-size:14px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
footer a{color:var(--muted);text-decoration:none;margin-right:16px}footer a:hover{color:var(--brand)}
@media (max-width:720px){.hero{grid-template-columns:1fr;padding-top:34px}.hero img{justify-self:start;max-width:160px;order:-1;border-radius:24px}.hero h1{font-size:33px}.btn.ghost{margin-left:0;margin-top:10px}.chat .u{max-width:100%}}