@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");
:root{
  --bg:#ffffff; --surface:#f5f5f5; --text:#111111; --muted:#6b6b6b;
  --brand:#111111; --brand-ink:#ffffff; --line:#e4e4e4; --mark:#e9e9e9;
  --font-brand:"Google Sans Flex","Google Sans","Product Sans",Inter,system-ui,sans-serif;
  --font-text:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0e0e0e; --surface:#181818; --text:#f2f2f2; --muted:#9a9a9a;
    --brand:#f2f2f2; --brand-ink:#0e0e0e; --line:#2a2a2a; --mark:#333333;
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font-text);line-height:1.65;font-size:17px}
a{color:var(--text);text-decoration-color:var(--muted);text-underline-offset:3px}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}
header.site{border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;padding-top:16px;padding-bottom:16px}
.logo{font-family:var(--font-brand);font-weight:700;font-size:1.5rem;letter-spacing:-.03em;color:var(--text);text-decoration:none}
nav a{margin-left:18px;text-decoration:none;color:var(--muted);font-size:.95rem}
nav a:hover{color:var(--text)}
.hero{padding:56px 0 32px}
.hero h1{font-family:var(--font-brand);font-weight:700;font-size:clamp(1.9rem,5.5vw,2.8rem);line-height:1.15;letter-spacing:-.02em;margin:0 0 16px}
.hero p{color:var(--muted);font-size:1.15rem;max-width:34em;margin:0 0 24px}
.btn{display:inline-block;background:var(--brand);color:var(--brand-ink);padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;margin:8px 0 40px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px}
.card h3{font-family:var(--font-brand);font-weight:600;margin:0 0 6px;font-size:1.05rem}
.card p{margin:0;color:var(--muted);font-size:.97rem}
section.block{padding:8px 0 24px}
h2{font-family:var(--font-brand);font-weight:600;font-size:1.25rem;margin:2em 0 .5em;letter-spacing:-.01em}
article h1{font-family:var(--font-brand);font-weight:700;font-size:clamp(1.7rem,5vw,2.3rem);line-height:1.2;letter-spacing:-.02em;margin:40px 0 4px}
article p,article li{max-width:46em}
blockquote{margin:1em 0;padding:.4em 1.1em;border-left:4px solid var(--brand);background:var(--surface);border-radius:0 10px 10px 0}
mark,.mark{background:var(--mark);color:inherit;padding:0 .2em;border-radius:3px}
footer.site{border-top:1px solid var(--line);margin-top:56px;padding:24px 0;color:var(--muted);font-size:.92rem}
footer.site a{color:var(--muted)}
@media (max-width:520px){nav a{margin-left:12px}}