:root{
  --bg:#f5f8f8;
  --surface:#ffffff;
  --surface-2:#eef3f3;
  --text:#16211f;
  --muted:#5c716f;
  --accent:#2e7d89;
  --accent-strong:#22636e;
  --border:#e2eaea;
  --radius:16px;
  --maxw:720px;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0e1618;
    --surface:#15211f;
    --surface-2:#1a2624;
    --text:#e9f1f0;
    --muted:#94a9a7;
    --accent:#63b7c3;
    --accent-strong:#8acdd6;
    --border:#243230;
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.62;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-strong);text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* header */
.site-header{
  position:sticky;top:0;z-index:10;
  backdrop-filter:saturate(1.4) blur(12px);
  -webkit-backdrop-filter:saturate(1.4) blur(12px);
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom:1px solid var(--border);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:28px;height:28px;border-radius:7px;display:block}
.brand .name{font-family:ui-rounded,"SF Pro Rounded",system-ui,sans-serif;font-weight:700;font-size:19px;letter-spacing:-0.01em;color:var(--text)}
nav.links{display:flex;gap:18px;font-size:15px}
nav.links a{color:var(--muted)}
nav.links a:hover{color:var(--accent);text-decoration:none}
@media(max-width:560px){ nav.links{gap:14px;font-size:14px} .brand .name{font-size:18px} }

/* hero */
.hero{text-align:center;padding:64px 0 26px}
.hero img.mark{width:92px;height:92px;border-radius:22px;box-shadow:0 12px 34px rgba(46,125,137,.28);margin-bottom:22px}
.hero h1{font-family:ui-rounded,"SF Pro Rounded",system-ui,sans-serif;font-weight:700;font-size:44px;line-height:1.05;letter-spacing:-0.02em;margin:0 0 14px}
.hero p.tag{font-size:19px;color:var(--muted);max-width:26ch;margin:0 auto;text-wrap:balance}

/* content */
main{padding:8px 0 56px}
.page-title{font-family:ui-rounded,"SF Pro Rounded",system-ui,sans-serif;font-weight:700;font-size:32px;letter-spacing:-0.02em;margin:40px 0 4px;text-wrap:balance}
.updated{color:var(--muted);font-size:14px;margin:0 0 26px}
h2{font-size:21px;letter-spacing:-0.01em;margin:34px 0 10px}
h3{font-size:17px;margin:22px 0 6px}
.lede{font-size:18px;color:var(--muted)}
ul{padding-left:22px}
li{margin:5px 0}
hr{border:none;border-top:1px solid var(--border);margin:34px 0}
strong{font-weight:600}

/* callout */
.note{
  background:var(--surface-2);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px 18px;
  margin:22px 0;
  font-size:15.5px;
  color:var(--muted);
}
.note strong{color:var(--text)}
.todo{border-color:#d9a441;background:color-mix(in srgb,#d9a441 13%,var(--surface));color:var(--text)}

/* feature cards */
.features{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:30px 0}
@media(max-width:560px){.features{grid-template-columns:1fr}}
.feature{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.feature h3{margin:0 0 4px;font-size:16px}
.feature p{margin:0;font-size:15px;color:var(--muted)}

/* buttons */
.cta{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;padding:11px 20px;border-radius:12px;font-weight:600;margin-top:8px}
.cta:hover{background:var(--accent-strong);color:#fff;text-decoration:none}
.pill{display:inline-block;font-size:13px;color:var(--muted);border:1px solid var(--border);border-radius:999px;padding:5px 12px;margin-top:18px}

/* footer */
.site-footer{border-top:1px solid var(--border);padding:28px 0;color:var(--muted);font-size:14px}
.site-footer .wrap{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;justify-content:space-between}
.site-footer nav{display:flex;flex-wrap:wrap;gap:14px}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:var(--accent)}
.disc{max-width:var(--maxw);margin:12px auto 0;padding:0 20px;color:var(--muted);font-size:13px;text-align:center;opacity:.9}