:root{
  --bg:#0e0e10; --bg2:#141417; --line:#2a2a2e;
  --fg:#ededed; --muted:#8a8a90; --dim:#5a5a60; --accent:#ededed;
  --sans:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:var(--sans);
  line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}
.label{font-family:var(--mono);font-size:.72rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--dim)}

/* nav */
nav{position:sticky;top:0;z-index:10;backdrop-filter:blur(8px);
  background:rgba(14,14,16,.7);border-bottom:1px solid var(--line);
  transition:border-color .2s}
nav.scrolled{border-bottom-color:#3a3a40}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{font-family:var(--mono);font-weight:600;letter-spacing:.12em}
.brand small{color:var(--dim);font-weight:400}
.btn{border:1px solid var(--line);padding:9px 16px;border-radius:8px;
  font-size:.9rem;transition:.15s;display:inline-block}
.btn:hover{border-color:var(--fg);background:var(--fg);color:var(--bg)}

/* hero */
.hero{padding:120px 0 90px;border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(2.4rem,6vw,4.2rem);line-height:1.05;
  font-weight:600;letter-spacing:-.02em;max-width:16ch}
.hero p{color:var(--muted);font-size:1.15rem;margin:24px 0 36px;max-width:54ch}
.cta{display:flex;gap:14px;flex-wrap:wrap}
.btn.primary{background:var(--fg);color:var(--bg);border-color:var(--fg)}
.btn.primary:hover{filter:brightness(.85)}
.scroll{margin-top:64px;color:var(--dim);font-size:.8rem;letter-spacing:.1em;
  transition:opacity .3s}

/* sections */
section{padding:80px 0;border-bottom:1px solid var(--line)}
.head{display:flex;align-items:baseline;gap:16px;margin-bottom:48px}
.head .num{font-family:var(--mono);color:var(--dim);font-size:.9rem}
.head h2{font-size:1.7rem;font-weight:600;letter-spacing:-.01em}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line)}
.card{background:var(--bg);padding:28px;transition:background .2s}
.card:hover{background:var(--bg2)}
.card .n{font-family:var(--mono);color:var(--dim);font-size:.8rem}
.card h3{margin:14px 0 8px;font-size:1.1rem;font-weight:600}
.card p{color:var(--muted);font-size:.95rem}

.tags{display:flex;flex-wrap:wrap;gap:10px}
.tag{font-family:var(--mono);font-size:.85rem;border:1px solid var(--line);
  border-radius:7px;padding:8px 13px;color:var(--fg)}
.tag span{color:var(--dim)}

pre{background:var(--bg2);border:1px solid var(--line);border-radius:10px;
  padding:20px;overflow:auto;font-family:var(--mono);font-size:.9rem;color:#d6d6d6}
pre .c{color:var(--dim)}
.lead{color:var(--muted);max-width:60ch;margin-bottom:28px}

.contact{display:flex;gap:14px;flex-wrap:wrap}

footer{padding:40px 0;color:var(--dim);font-size:.85rem}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
footer a{color:var(--muted);border-bottom:1px solid var(--line);transition:.15s}
footer a:hover{color:var(--fg);border-bottom-color:var(--fg)}

/* progressive reveal (через JS добавляется .in) */
.reveal{opacity:0;transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}