:root{
    --bg:#090D16;
    --panel:#101625;
    --panel-2:#161D2E;
    --border: rgba(231,236,243,0.10);
    --border-strong: rgba(231,236,243,0.24);
    --text:#E7ECF3;
    --text-dim:#97A1B3;
    --cyan:#3ECFFF;
    --violet:#9B6BFF;
    --green:#6EE7A8;
    --amber:#FFC163;
    --font-head:'Space Grotesk', sans-serif;
    --font-body:'Manrope', sans-serif;
    --font-mono:'JetBrains Mono', monospace;
    color-scheme: dark;
  }
  :root[data-theme="light"]{ }
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){ } }

  *{ box-sizing:border-box; }
  html,body{ margin:0; padding:0; height:100%; }
  html{ scroll-padding-top: env(safe-area-inset-top,0px); }
  body{
    background:var(--bg); color:var(--text);
    font-family:var(--font-body); font-size:17px; line-height:1.7;
    padding-top: env(safe-area-inset-top,0px);
    padding-bottom: env(safe-area-inset-bottom,0px);
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img,svg{ max-width:100%; }
  a{ color:var(--text); text-decoration:none; }
  a:hover{ color:var(--cyan); }
  ::selection{ background:var(--cyan); color:#05131c; }

  .wrap{ max-width:1200px; margin:0 auto; padding:0 32px; position:relative; }

  /* faint dot-grid tech backdrop */
  .dotgrid{
    position:absolute; inset:0; pointer-events:none;
    background-image: radial-gradient(var(--border-strong) 1px, transparent 1px);
    background-size: 26px 26px;
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black 40%, transparent 85%);
    mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black 40%, transparent 85%);
  }

  h1,h2,h3,h4{ font-family:var(--font-head); color:var(--text); margin:0 0 20px; }
  h1{ font-weight:600; font-size:clamp(2.4rem,6.6vw,4.4rem); line-height:1.08; letter-spacing:-0.01em; max-width:16ch; }
  h2{ font-weight:600; font-size:clamp(1.8rem,3.4vw,2.4rem); line-height:1.2; max-width:18ch; }
  h3{ font-weight:600; font-size:1.34rem; line-height:1.3; }
  p{ margin:0 0 16px; max-width:60ch; color:var(--text-dim); }
  p.lead{ font-size:1.14rem; max-width:52ch; color:var(--text); }

  .tag{
    display:inline-flex; align-items:center; gap:8px;
    font-family:var(--font-mono); font-size:0.78rem; color:var(--cyan);
    letter-spacing:0.02em; margin-bottom:18px;
  }
  .tag::before{ content:""; width:6px; height:6px; background:var(--cyan); border-radius:50%; box-shadow:0 0 8px var(--cyan); }

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex; align-items:center; gap:10px;
    font-family:var(--font-body); font-weight:600; font-size:0.97rem;
    padding:15px 30px; background:var(--cyan); color:#031019; border:none;
    cursor:pointer; transition: transform .15s ease, box-shadow .15s ease;
  }
  .btn:hover{ transform:translateY(-2px); box-shadow:0 10px 26px -10px rgba(62,207,255,0.55); color:#031019; }
  .btn.ghost{ background:transparent; color:var(--text); border:1px solid var(--border-strong); }
  .btn.ghost:hover{ border-color:var(--cyan); color:var(--cyan); box-shadow:none; transform:translateY(-2px); }
  @media (max-width:544px){ .btn{ padding:14px 24px; font-size:0.92rem; } }

  /* ---------- header ---------- */
  header{
    background:rgba(9,13,22,0.82); backdrop-filter:blur(10px);
    border-bottom:1px solid var(--border);
    position:sticky; top:0; z-index:50;
  }
  .nav-row{
    display:flex; align-items:center; justify-content:space-between;
    max-width:1200px; margin:0 auto; padding:18px 32px; min-height:76px;
  }
  .logo{ display:flex; align-items:center; gap:10px; }
  .logo .mark{
    font-family:var(--font-mono); font-weight:500; font-size:1.1rem;
    color:var(--cyan);
  }
  .logo .name{ font-family:var(--font-head); font-weight:600; font-size:1.05rem; color:var(--text); letter-spacing:0.01em; }

  nav.links{ display:flex; gap:2px; }
  nav.links button{
    font-family:var(--font-mono); font-size:0.86rem;
    color:var(--text-dim); background:none; border:none; cursor:pointer; padding:10px 16px;
    position:relative;
  }
  nav.links button::before{ content:"";}
  nav.links button:hover, nav.links button.active{ color:var(--cyan); }
  nav.links button.active::after{
    content:""; position:absolute; left:16px; right:16px; bottom:2px; height:2px; background:var(--cyan);
  }
  .burger{ display:none; background:none; border:1px solid var(--border-strong); color:var(--text); padding:8px 12px; cursor:pointer; }

  @media (max-width:860px){
    nav.links{
      display:none; position:absolute; top:100%; left:0; right:0;
      flex-direction:column; background:var(--bg); border-bottom:1px solid var(--border);
      padding:6px 32px 18px;
    }
    nav.links.open{ display:flex; }
    nav.links button{ text-align:left; padding:12px 0; border-bottom:1px solid var(--border); }
    nav.links button.active::after{ display:none; }
    .burger{ display:inline-block; }
  }

  /* ---------- page switching ---------- */
  main{ position:relative; }
  .page{ display:none; }
  .page.active{ display:block; animation: rise .45s ease both; }
  @keyframes rise{ from{opacity:0; transform:translateY(8px);} to{opacity:1; transform:none;} }
  @media (prefers-reduced-motion: reduce){ .page.active{ animation:none; } }

  section{ padding:92px 0; position:relative; }
  section.alt{ background:var(--panel); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }

  /* ---------- hero ---------- */
  .hero{ padding-top:96px; padding-bottom:96px; overflow:hidden; }
  .hero-inner{ display:grid; grid-template-columns:1.05fr 0.95fr; gap:56px; align-items:center; }
  @media (max-width:940px){ .hero-inner{ grid-template-columns:1fr; } }
  .hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-top:10px; }

  /* code editor mock */
  .editor{
    background:var(--panel); border:1px solid var(--border-strong);
    box-shadow: 0 30px 60px -30px rgba(0,0,0,0.6);
  }
  .editor-bar{
    display:flex; align-items:center; gap:8px; padding:12px 16px;
    border-bottom:1px solid var(--border);
  }
  .editor-bar .dot{ width:10px; height:10px; border-radius:50%; }
  .editor-bar .dot.r{ background:#FF6159; }
  .editor-bar .dot.y{ background:#FFBD2E; }
  .editor-bar .dot.g{ background:#28C840; }
  .editor-bar .file{ margin-left:14px; font-family:var(--font-mono); font-size:0.78rem; color:var(--text-dim); }
  .editor-body{ padding:22px 22px 26px; font-family:var(--font-mono); font-size:0.86rem; line-height:1.85; overflow-x:auto; }
  .editor-body .ln{ color:#4A5468; display:inline-block; width:22px; user-select:none; }
  .kw{ color:var(--violet); }
  .fn{ color:var(--cyan); }
  .str{ color:var(--green); }
  .cm{ color:#5C6579; }
  .num{ color:var(--amber); }
  .cursor{
    display:inline-block; width:7px; height:1.1em; background:var(--cyan); vertical-align:text-bottom;
    animation: blink 1.1s steps(1) infinite;
  }
  @keyframes blink{ 50%{ opacity:0; } }
  @media (prefers-reduced-motion: reduce){ .cursor{ animation:none; } }

  /* ---------- offerings cards (file-tab style) ---------- */
  .offer-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:28px; margin-top:52px; }
  @media (max-width:940px){ .offer-grid{ grid-template-columns:1fr; } }
  .offer{ background:var(--panel); border:1px solid var(--border); }
  .offer-head{
    display:flex; align-items:center; gap:8px; padding:12px 18px; border-bottom:1px solid var(--border);
    font-family:var(--font-mono); font-size:0.78rem; color:var(--text-dim);
  }
  .offer-head .dot{ width:8px; height:8px; border-radius:50%; background:var(--cyan); opacity:0.7; }
  .offer-content{ padding:26px 26px 30px; }
  .offer-content svg{ width:30px; height:30px; stroke:var(--cyan); margin-bottom:18px; }
  .offer h3{ margin-bottom:10px; }
  .offer p{ margin:0; font-size:0.97rem; max-width:none; }

  /* ---------- two column split ---------- */
  .split{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
  @media (max-width:940px){ .split{ grid-template-columns:1fr; gap:32px; } }

  .spec-card{ background:var(--bg); border:1px solid var(--border-strong); font-family:var(--font-mono); font-size:0.9rem; }
  .spec-row{ display:flex; justify-content:space-between; gap:16px; padding:16px 22px; border-bottom:1px solid var(--border); }
  .spec-row:last-child{ border-bottom:none; }
  .spec-row .k{ color:var(--text-dim); }
  .spec-row .v{ color:var(--cyan); text-align:right; }

  /* ---------- services page blocks ---------- */
  .service-block{ display:grid; grid-template-columns:0.4fr 1fr; gap:56px; padding:54px 0; border-bottom:1px solid var(--border); align-items:start; }
  .service-block:first-of-type{ padding-top:0; }
  .service-block:last-child{ border-bottom:none; }
  @media (max-width:940px){ .service-block{ grid-template-columns:1fr; gap:20px; } }
  .service-block .idx{ font-family:var(--font-mono); font-size:0.85rem; color:var(--cyan); }
  .service-block svg{ width:34px; height:34px; stroke:var(--cyan); margin-top:10px; }

  /* ---------- CTA banner ---------- */
  .cta-banner{
    background: linear-gradient(120deg, #0E2A38, #14203A 45%, #1B1533);
    border-top:1px solid var(--border); border-bottom:1px solid var(--border);
  }
  .cta-inner{ display:flex; justify-content:space-between; align-items:center; gap:32px; flex-wrap:wrap; }
  .cta-inner p{ color:var(--text-dim); }

  /* ---------- contact ---------- */
  .contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:64px; }
  @media (max-width:940px){ .contact-grid{ grid-template-columns:1fr; gap:36px; } }
  .contact-line{ display:flex; flex-direction:column; gap:6px; padding:20px 0; border-bottom:1px solid var(--border); }
  .contact-line .k{ font-family:var(--font-mono); font-size:0.76rem; letter-spacing:1px; color:var(--cyan); }
  .contact-line .v{ color:var(--text); font-size:1.06rem; }

  /* ---------- footer ---------- */
  footer{ background:var(--bg); border-top:1px solid var(--border); padding:34px 0; }
  .foot-row{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:14px; }
  .foot-nav{ display:flex; gap:22px; flex-wrap:wrap; }
  .foot-nav a{ font-family:var(--font-mono); font-size:0.82rem; color:var(--text-dim); }
  .foot-nav a:hover{ color:var(--cyan); }
  .foot-copy{ color:#5C6579; font-size:0.82rem; font-family:var(--font-mono); }