:root{
  --bg:#0b0c10;--bg2:#101218;--surface:#151821;--line:#232733;--fg:#f4f5f7;--fg2:#a6abb8;--muted:#7b8090;
  --accent:#4cd964;--accent-ink:#06210c;--radius:18px;--max:1080px;
}
@media(prefers-color-scheme:light){:root{--bg:#fbfbfc;--bg2:#f3f4f7;--surface:#fff;--line:#e6e8ee;--fg:#111318;--fg2:#4d5260;--muted:#767b89;--accent:#1f9d3d;--accent-ink:#fff}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 Inter,-apple-system,BlinkMacSystemFont,"SF Pro Text",system-ui,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{letter-spacing:-.02em;line-height:1.15;margin:0}
p{margin:0 0 1em}
.muted{color:var(--muted)}
.eyebrow{font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}

/* header */
header.site{max-width:var(--max);margin:0 auto;padding:22px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;color:var(--fg);font-size:1.02rem}
.brand:hover{text-decoration:none}
.mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--accent);color:var(--accent-ink)}
header nav{display:flex;gap:26px}
header nav a{color:var(--fg2);font-weight:500;font-size:.95rem}
header nav a:hover,header nav a.active{color:var(--fg);text-decoration:none}

/* layout */
main{max-width:var(--max);margin:0 auto;padding:0 24px 40px}
.section{padding:56px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:28px}
.section-head h2,.section h2{font-size:1.75rem}
.section h2{margin:32px 0 10px}
.section h2:first-child{margin-top:0}
.section h3{font-size:1.05rem;margin:22px 0 6px}

/* hero */
.hero{padding:72px 0 40px;max-width:720px}
.hero h1{font-size:clamp(2.4rem,6vw,4rem);font-weight:700;margin-bottom:18px}
.lead{font-size:1.2rem;color:var(--fg2);max-width:640px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 18px;border-radius:999px;font-weight:600;font-size:.95rem;border:1px solid var(--line);color:var(--fg);background:var(--surface)}
.btn:hover{text-decoration:none;border-color:var(--muted)}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn.disabled{color:var(--muted);cursor:default}

/* app grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.card{display:flex;flex-direction:column;gap:6px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;color:var(--fg);transition:transform .15s ease,border-color .15s ease}
.card:hover{text-decoration:none;transform:translateY(-2px);border-color:var(--muted)}
.card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:14px}
.glyph{display:inline-grid;place-items:center;width:52px;height:52px;border-radius:14px;background:var(--bg2);border:1px solid var(--line);color:var(--accent)}
.glyph.large{width:72px;height:72px;border-radius:20px;margin-bottom:22px}
.card h3{font-size:1.15rem}
.card p{color:var(--fg2);margin:0}
.card .meta{color:var(--muted);font-size:.85rem;margin-top:auto;padding-top:14px}
.pill{font-size:.72rem;font-weight:600;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:3px 9px;white-space:nowrap}

/* principles */
.principles{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:28px 32px}
.principles h3{font-size:1.05rem;margin:0 0 6px}
.principles p{color:var(--fg2);margin:0}

/* app page */
.app-hero{padding-top:48px}
.two-col{display:grid;grid-template-columns:1fr 280px;gap:40px;align-items:start}
@media(max-width:760px){.two-col{grid-template-columns:1fr}}
.features{padding-left:20px;margin:12px 0 0;color:var(--fg2)}
.features li{margin:6px 0}
.facts{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px}
.facts dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:10px 16px;font-size:.95rem}
.facts dt{color:var(--muted)}
.facts dd{margin:0;font-weight:500}

/* docs */
.doc{max-width:720px;padding:48px 0}
.doc h1{font-size:clamp(2rem,5vw,2.75rem);margin-bottom:10px}
.doc h2{font-size:1.25rem;margin:36px 0 8px}
.doc ul{padding-left:20px}
.doc li{margin:6px 0}
.linklist{list-style:none;padding:0}
.linklist li{padding:10px 0;border-bottom:1px solid var(--line)}
.linklist a{font-weight:600;color:var(--fg)}

/* footer */
footer.site{max-width:var(--max);margin:0 auto;padding:40px 24px 48px;border-top:1px solid var(--line)}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
@media(max-width:640px){footer .cols{grid-template-columns:1fr}}
footer h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:10px}
footer .cols a{display:block;color:var(--fg2);padding:3px 0;font-size:.95rem}
footer .cols a.brand{display:inline-flex;color:var(--fg);margin-bottom:12px}
footer .muted{max-width:320px;font-size:.95rem}
footer .legal{color:var(--muted);font-size:.8rem;margin:32px 0 0}