:root{
  --ground:#F4F6FA; --card:#FFFFFF; --sunk:#F7F9FC;
  --ink:#101426; --muted:#5B6478; --faint:#8A93A6;
  --line:#E2E7F0; --line-soft:#EDF1F7;
  --accent:#3B5BF6; --accent-soft:#EEF1FE;
  --gold:#F7B500; --gold-soft:#FFF7E2; --gold-ink:#6B4E00;
  --logo-red:#FF4D3A;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --ground:#0E1117; --card:#171B26; --sunk:#11151E;
  --ink:#E8ECF5; --muted:#98A2B8; --faint:#6E778C;
  --line:#252B3A; --line-soft:#1F2431;
  --accent:#7C93FF; --accent-soft:#1B2136;
  --gold:#F7B500; --gold-soft:#2A2312; --gold-ink:#F0C55C;
}}
:root[data-theme="dark"]{
  --ground:#0E1117; --card:#171B26; --sunk:#11151E;
  --ink:#E8ECF5; --muted:#98A2B8; --faint:#6E778C;
  --line:#252B3A; --line-soft:#1F2431;
  --accent:#7C93FF; --accent-soft:#1B2136;
  --gold:#F7B500; --gold-soft:#2A2312; --gold-ink:#F0C55C;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--ground);color:var(--ink);margin:0;padding:40px 20px 72px;
  font-family:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:22px}
a{color:var(--accent)}
header{display:flex;flex-direction:column;gap:13px}
.mark{display:inline-flex;align-items:center;gap:11px;font-weight:800;font-size:14px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--accent);text-decoration:none}
.mark img{width:32px;height:32px;border-radius:9px;background:var(--logo-red);display:block}
h1{font-weight:800;font-size:clamp(28px,6vw,40px);line-height:1.14;letter-spacing:-.02em;
  margin:0;text-wrap:balance}
.lede{color:var(--muted);margin:0;max-width:60ch}
.apps{display:flex;flex-wrap:wrap;gap:8px}
.app-chip{background:var(--card);border:1px solid var(--line);border-radius:999px;
  padding:7px 15px;font-size:14px;font-weight:500;display:inline-flex;align-items:center;gap:8px}
.app-chip img{width:20px;height:20px;border-radius:6px;display:block}
.app-chip code{font-size:12px;color:var(--muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
nav.langs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:14px}
nav.langs button{font:inherit;font-weight:700;font-size:14.5px;background:transparent;
  color:var(--muted);border:1px solid transparent;border-radius:999px;padding:8px 16px;
  cursor:pointer;transition:.15s}
nav.langs button:hover{color:var(--ink);background:var(--card)}
nav.langs button[aria-selected="true"]{background:var(--accent);color:#fff;border-color:var(--accent)}
nav.langs button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
section.pane[hidden]{display:none}
section.pane{display:flex;flex-direction:column;gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;
  padding:22px 25px;display:flex;flex-direction:column;gap:10px}
.card h2{font-weight:800;font-size:18.5px;letter-spacing:-.01em;margin:0}
.card p{margin:0}
.card p.sub{color:var(--muted);font-size:15px}
ul{margin:0;padding-left:1.15em;display:flex;flex-direction:column;gap:7px}
li::marker{color:var(--accent)}
.hero-card{background:var(--accent-soft);border-color:transparent;
  flex-direction:row;align-items:center;gap:18px}
.hero-card .big{font-weight:800;font-size:40px;line-height:1;color:var(--accent);letter-spacing:-.03em}
.hero-card strong{font-size:17px;font-weight:700;display:block}
.hero-card p{font-size:15px;color:var(--muted);margin:4px 0 0}
.note{background:var(--gold-soft);border:1px solid var(--gold);border-radius:14px;
  padding:13px 17px;font-size:14.5px}
.note strong{font-weight:700}
.steps{counter-reset:s;list-style:none;padding:0;gap:9px}
.steps li{counter-increment:s;display:flex;gap:11px;align-items:flex-start}
.steps li::before{content:counter(s);flex:none;width:22px;height:22px;border-radius:7px;
  background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:800;
  display:flex;align-items:center;justify-content:center;margin-top:3px}
footer{color:var(--faint);font-size:13.5px;text-align:center;border-top:1px solid var(--line);
  padding-top:20px;line-height:1.7}
footer a{color:var(--muted)}