:root {
    --bg: #0b0d12;
    --bg-2: #11141b;
    --card: #151924;
    --line: #232838;
    --text: #e8ebf2;
    --muted: #9aa3b8;
    --accent: #7c9cff;
    --accent-2: #4fe0b6;
    --warm: #ffb86b;
    --radius: 14px;
    --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
    --sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  }
  :root[data-theme="light"] {
    --bg: #f7f8fb;
    --bg-2: #eef1f6;
    --card: #ffffff;
    --line: #dde2ec;
    --text: #12151d;
    --muted: #5a6378;
    --accent: #3d5ce6;
    --accent-2: #0f9d76;
    --warm: #c56a00;
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0; background: var(--bg); color: var(--text);
    font: 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; text-decoration: none; }
  .wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
  .mono { font-family: var(--mono); }
  .eyebrow { font: 600 12px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--accent-2); }
  h1, h2, h3 { line-height: 1.15; margin: 0; letter-spacing: -.02em; }
  h2 { font-size: clamp(28px, 4vw, 40px); margin: 12px 0 16px; }
  .lead { color: var(--muted); font-size: 18px; max-width: 640px; }
  section { padding: 96px 0; border-top: 1px solid var(--line); }

  /* nav */
  body > nav { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(12px);
        background: color-mix(in srgb, var(--bg) 80%, transparent); border-bottom: 1px solid var(--line); }
  body > nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
  .logo { display: flex; align-items: center; gap: 10px; font: 700 20px/1 var(--sans); letter-spacing: -.02em; }
  .logo-mark { width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center;
               background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #0b0d12; font: 800 15px var(--mono); }
  .links { display: flex; gap: 28px; align-items: center; color: var(--muted); font-size: 15px; }
  .links a:hover { color: var(--text); }
  .btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border-radius: 10px;
         font-weight: 600; font-size: 15px; border: 1px solid var(--line); transition: .15s; cursor: pointer; background: none; color: var(--text); }
  .btn:hover { border-color: var(--muted); }
  .btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
  .btn-primary:hover { filter: brightness(1.1); border-color: var(--accent); }
  .theme-toggle { width: 38px; height: 38px; padding: 0; justify-content: center; }

  /* hero */
  .hero { padding: 120px 0 100px; border: 0; position: relative; overflow: hidden; }
  .hero::before { content: ""; position: absolute; inset: -40% -10% auto auto; width: 700px; height: 700px;
    background: radial-gradient(closest-side, color-mix(in srgb, var(--accent) 25%, transparent), transparent); pointer-events: none; }
  .hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; position: relative; }
  .hero h1 { font-size: clamp(38px, 6vw, 64px); margin: 18px 0 22px; }
  .hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--accent), var(--accent-2));
                -webkit-background-clip: text; background-clip: text; color: transparent; }
  .hero-cta { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
  .terminal { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
              font: 13.5px/1.75 var(--mono); box-shadow: 0 30px 60px -30px rgba(0,0,0,.5); }
  .terminal-bar { display: flex; gap: 7px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
  .terminal-bar span { width: 11px; height: 11px; border-radius: 50%; background: var(--line); }
  .terminal pre { margin: 0; padding: 18px 20px; white-space: pre-wrap; color: var(--muted); }
  .t-k { color: var(--accent); } .t-s { color: var(--accent-2); } .t-w { color: var(--warm); } .t-t { color: var(--text); }

  .trust { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 40px; }
  .badge { display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; border: 1px solid var(--line);
           border-radius: 999px; font: 500 13px var(--mono); color: var(--muted); background: var(--bg-2); }
  .badge i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-2); }

  /* services */
  .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
  .card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
  .card h3 { font-size: 19px; margin: 16px 0 8px; }
  .card p { color: var(--muted); margin: 0; font-size: 15px; }
  .icon { width: 42px; height: 42px; border-radius: 10px; display: grid; place-items: center;
          background: var(--bg-2); border: 1px solid var(--line); font: 600 16px var(--mono); color: var(--accent); }

  /* products */
  .products { display: grid; gap: 20px; margin-top: 48px; }
  .product { display: grid; grid-template-columns: 1fr 1.1fr; background: var(--card); border: 1px solid var(--line);
             border-radius: var(--radius); overflow: hidden; transition: .2s; }
  .product:hover { border-color: color-mix(in srgb, var(--p) 60%, var(--line)); transform: translateY(-2px); }
  .product-body { padding: 36px; display: flex; flex-direction: column; }
  .product-tag { font: 600 12px var(--mono); color: var(--p); letter-spacing: .1em; text-transform: uppercase; }
  .product h3 { font-size: 30px; margin: 10px 0 12px; }
  .product p { color: var(--muted); margin: 0 0 20px; }
  .chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
  .chip { font: 12px var(--mono); padding: 4px 10px; border-radius: 6px; background: var(--bg-2); border: 1px solid var(--line); color: var(--muted); }
  .product-link { margin-top: auto; font-weight: 600; color: var(--p); display: inline-flex; gap: 6px; }
  .product-visual { background: linear-gradient(140deg, color-mix(in srgb, var(--p) 22%, var(--bg-2)), var(--bg-2));
                    display: grid; place-items: center; min-height: 280px; position: relative; }
  .phone { width: 170px; height: 300px; border-radius: 26px; background: var(--bg); border: 6px solid var(--line);
           padding: 18px 14px; display: flex; flex-direction: column; gap: 10px; box-shadow: 0 30px 50px -20px rgba(0,0,0,.5); transform: translateY(30px); }
  .ph-title { font: 700 14px var(--sans); }
  .ph-big { font: 800 26px var(--sans); color: var(--p); letter-spacing: -.02em; }
  .ph-row { height: 30px; border-radius: 8px; background: var(--bg-2); display: flex; align-items: center; padding: 0 10px;
            font: 11px var(--mono); color: var(--muted); justify-content: space-between; }
  .ph-bar { height: 6px; border-radius: 3px; background: var(--bg-2); overflow: hidden; }
  .ph-bar b { display: block; height: 100%; background: var(--p); }
  .bubble { font: 11px/1.4 var(--sans); padding: 7px 10px; border-radius: 12px; max-width: 85%; }
  .bubble.in { background: var(--bg-2); color: var(--muted); align-self: flex-start; }
  .bubble.out { background: var(--p); color: #0b0d12; align-self: flex-end; }

  /* stack */
  .stack-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 48px; }
  .stack-col h4, .stack-col .visually-h4 { margin: 0 0 14px; font: 600 12px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
  .stack-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
  .stack-col li { padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); font-size: 15px;
                  display: flex; justify-content: space-between; align-items: center; }
  .stack-col li small { font: 11px var(--mono); color: var(--muted); }

  /* certs */
  .certs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 48px; }
  .cert { padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--card); }
  .cert-seal { width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; font: 800 14px var(--mono);
               border: 2px solid var(--c); color: var(--c); margin-bottom: 18px; }
  .cert h3 { font-size: 16px; margin-bottom: 6px; }
  .cert p { margin: 0; color: var(--muted); font-size: 14px; }
  .cloud-strip { margin-top: 20px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .cloud { padding: 28px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--bg-2); }
  .cloud h3 { font-size: 20px; margin-bottom: 10px; display: flex; gap: 10px; align-items: center; }
  .cloud p { color: var(--muted); margin: 0 0 14px; font-size: 15px; }

  /* process */
  .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px; counter-reset: s; }
  .step { position: relative; padding-top: 22px; border-top: 2px solid var(--line); }
  .step::before { counter-increment: s; content: "0" counter(s); font: 600 13px var(--mono); color: var(--accent); }
  .step h3 { font-size: 18px; margin: 10px 0 8px; }
  .step p { color: var(--muted); font-size: 15px; margin: 0; }

  /* contact */
  .contact { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
  form { display: grid; gap: 14px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
  label { font-size: 13px; color: var(--muted); display: grid; gap: 6px; }
  input, textarea, select { font: 15px var(--sans); color: var(--text); background: var(--bg-2); border: 1px solid var(--line);
                            border-radius: 9px; padding: 11px 13px; outline: none; }
  input:focus, textarea:focus, select:focus { border-color: var(--accent); }
  textarea { min-height: 110px; resize: vertical; }
  .row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
  .facts { display: grid; gap: 14px; margin-top: 28px; }
  .fact { display: flex; gap: 14px; align-items: baseline; color: var(--muted); }
  .fact b { color: var(--text); font: 700 22px var(--sans); min-width: 70px; }
  .sent { display: none; padding: 14px; border-radius: 9px; background: color-mix(in srgb, var(--accent-2) 15%, transparent);
          color: var(--accent-2); font-size: 14px; }

  footer { border-top: 1px solid var(--line); padding: 48px 0; color: var(--muted); font-size: 14px; }
  footer .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
  footer a:hover { color: var(--text); }
  .foot-links { display: flex; gap: 22px; flex-wrap: wrap; }

  @media (max-width: 900px) {
    .hero-grid, .product, .contact, .cloud-strip { grid-template-columns: 1fr; }
    .grid-3, .stack-grid, .certs, .steps { grid-template-columns: 1fr 1fr; }
    .links a:not(.btn) { display: none; }
    .product-visual { min-height: 240px; order: -1; }
    section { padding: 72px 0; }
  }
  @media (max-width: 560px) {
    .wrap { padding: 0 16px; }
    .grid-3, .stack-grid, .certs, .steps, .row { grid-template-columns: 1fr; }
    .hero { padding: 72px 0; }
    .product-body { padding: 26px; }
  }

  /* inner pages */
  .page-hero { padding: 88px 0 56px; border: 0; }
  .page-hero h1 { font-size: clamp(34px, 5vw, 52px); margin: 16px 0 20px; max-width: 820px; }
  .crumbs { font: 13px var(--mono); color: var(--muted); }
  .crumbs a:hover { color: var(--text); }
  .prose { max-width: 760px; }
  .prose h2 { font-size: clamp(24px, 3vw, 30px); margin: 48px 0 14px; }
  .prose h3 { font-size: 19px; margin: 28px 0 8px; }
  .prose p, .prose li { color: var(--muted); font-size: 17px; }
  .prose strong { color: var(--text); }
  .prose a, .inline-link { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
  .prose ul { padding-left: 20px; }
  .two-col { display: grid; grid-template-columns: 1fr 320px; gap: 56px; align-items: start; }
  .aside { position: sticky; top: 88px; display: grid; gap: 16px; }
  .aside .card h3 { margin-top: 0; }
  .facts-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; font-size: 14px; }
  .facts-list li { display: flex; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); padding-bottom: 10px; color: var(--muted); }
  .facts-list li b { color: var(--text); font-weight: 600; text-align: right; }
  .cta-band { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 40px;
              display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
  .cta-band h2 { margin: 0 0 6px; font-size: 26px; }
  .cta-band p { margin: 0; color: var(--muted); }
  .product-links { display: flex; gap: 18px; flex-wrap: wrap; margin-top: auto; }
  .product-links a { font-weight: 600; color: var(--p); }
  .product-links a.secondary { color: var(--muted); }
  .product-links a:hover { text-decoration: underline; text-underline-offset: 3px; }
  .card-link { display: block; transition: .15s; }
  .card-link:hover { border-color: var(--accent); }
  .card-link .more { display: inline-block; margin-top: 14px; color: var(--accent); font-weight: 600; font-size: 15px; }
  details { border-bottom: 1px solid var(--line); padding: 18px 0; }
  details summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
  details summary::after { content: "+"; color: var(--accent); font: 600 20px var(--mono); }
  details[open] summary::after { content: "−"; }
  details p { color: var(--muted); margin: 12px 0 0; }
  .faq { max-width: 820px; margin-top: 32px; }
  .stars { font-size: 11px; color: var(--muted); font-family: var(--mono); }
  .muscle { display: grid; grid-template-columns: 54px 1fr 26px; gap: 6px; align-items: center; font: 10px var(--mono); color: var(--muted); }
  .lesson { padding: 8px 10px; border-radius: 8px; background: var(--bg-2); font: 11px/1.4 var(--sans); color: var(--muted); }
  .lesson b { color: var(--text); }
  .gap { display: inline-block; min-width: 38px; border-bottom: 2px solid var(--p); color: var(--p); font-weight: 700; text-align: center; }
  .ok { color: var(--accent-2); font: 11px var(--mono); }
  @media (max-width: 900px) {
    .two-col { grid-template-columns: 1fr; }
    .aside { position: static; }
  }
  @media (max-width: 560px) { .cta-band { padding: 26px; } }
  .foot-cols { display: flex; gap: 56px; flex-wrap: wrap; }
  .foot-cols h4 { margin: 0 0 12px; font: 600 12px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--text); }
  .foot-cols div { display: grid; gap: 8px; align-content: start; }
  .foot-cols a:hover { color: var(--text); }