:root {
    --ink: #0a0d14;
    --soft: #3d4560;
    --mist: #f6f7f9;
    --white: #ffffff;
    --accent: #0057ff;
    --border: rgba(10,13,20,0.08);
    --green: #00a854;
    --red: #d93025;
    --amber: #c47d00;
    --mono: 'SF Mono', 'Fira Code', 'Courier New', monospace;
    --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { font-size: 16px; scroll-behavior: smooth; }

  body {
    font-family: var(--sans);
    color: var(--ink);
    background: var(--white);
    line-height: 1.7;
    max-width: 780px;
    margin: 0 auto;
    padding: 48px 24px 80px;
  }

  /* ── HEADER ── */
  .site-header {
    display: flex; justify-content: space-between; align-items: center;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 56px;
  }
  .brand { font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--ink); text-decoration: none; }
  .brand span { color: var(--soft); font-weight: 400; }
  .header-cta {
    font-size: 13px; font-weight: 600; color: var(--accent);
    text-decoration: none; border-bottom: 1.5px solid var(--accent);
    padding-bottom: 1px;
  }

  /* ── EYEBROW ── */
  .eyebrow {
    font-family: var(--mono); font-size: 11px; font-weight: 700;
    letter-spacing: .1em; text-transform: uppercase;
    color: var(--accent); margin-bottom: 16px;
  }

  /* ── HERO TEXT ── */
  h1 {
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 700; line-height: 1.08;
    letter-spacing: -.03em;
    color: var(--ink);
    margin-bottom: 20px;
  }
  h1 em { font-style: normal; color: var(--accent); }

  .lead {
    font-size: 18px; color: var(--soft);
    max-width: 620px; margin-bottom: 36px; line-height: 1.65;
  }

  .cta-row { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; margin-bottom: 48px; }
  .btn {
    display: inline-block; font-size: 14px; font-weight: 600;
    padding: 12px 24px; border-radius: 6px; text-decoration: none;
    transition: opacity .2s;
  }
  .btn:hover { opacity: .85; }
  .btn-blue { background: var(--accent); color: #fff; }
  .btn-outline { border: 1.5px solid var(--border); color: var(--ink); }

  /* ── DIVIDER ── */
  hr { border: none; border-top: 1px solid var(--border); margin: 48px 0; }

  /* ── STATS ROW ── */
  .stats {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 1px; background: var(--border);
    border: 1px solid var(--border); border-radius: 8px;
    overflow: hidden; margin-bottom: 56px;
  }
  .stat { background: var(--mist); padding: 20px 16px; text-align: center; }
  .stat-num { font-family: var(--mono); font-size: 24px; font-weight: 700; color: var(--ink); }
  .stat-lbl { font-size: 11px; color: var(--soft); margin-top: 4px; text-transform: uppercase; letter-spacing: .05em; }

  /* ── SECTION HEADINGS ── */
  h2 {
    font-size: 22px; font-weight: 700; letter-spacing: -.02em;
    color: var(--ink); margin-bottom: 6px;
  }
  .section-intro { font-size: 15px; color: var(--soft); margin-bottom: 28px; }

  /* ── FEATURE LIST ── */
  .feature-list { list-style: none; display: flex; flex-direction: column; gap: 16px; margin-bottom: 48px; }
  .feature-list li {
    padding: 20px 20px 20px 56px;
    border: 1px solid var(--border); border-radius: 8px;
    background: var(--white); position: relative;
    font-size: 14px; color: var(--soft); line-height: 1.6;
  }
  .feature-list li::before {
    content: attr(data-icon);
    position: absolute; left: 16px; top: 18px;
    font-size: 18px;
  }
  .feature-list li strong { display: block; font-size: 15px; color: var(--ink); margin-bottom: 4px; }

  /* ── READING STATES ── */
  .states { display: flex; gap: 10px; flex-wrap: wrap; margin: 20px 0 40px; }
  .state {
    font-family: var(--mono); font-size: 12px; font-weight: 700;
    padding: 6px 14px; border-radius: 100px;
    display: flex; align-items: center; gap: 6px;
  }
  .state::before { content: ''; width: 7px; height: 7px; border-radius: 50%; }
  .state-ok { background: #e6f4ee; color: var(--green); border: 1px solid #b7dfca; }
  .state-ok::before { background: var(--green); }
  .state-hi { background: #fef7e0; color: var(--amber); border: 1px solid #f0d090; }
  .state-hi::before { background: var(--amber); }
  .state-lo { background: #f0f4ff; color: var(--accent); border: 1px solid #c0d0ff; }
  .state-lo::before { background: var(--accent); }
  .state-sc { background: #fce8e6; color: var(--red); border: 1px solid #f4c6c2; }
  .state-sc::before { background: var(--red); }

  /* ── CHIP TAGS ── */
  .chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 32px; }
  .chip {
    font-family: var(--mono); font-size: 11px; font-weight: 700;
    padding: 5px 12px; border-radius: 100px;
    border: 1.5px solid var(--border); color: var(--soft);
    background: var(--mist);
  }
  .chip.accent { border-color: rgba(0,87,255,0.25); color: var(--accent); background: rgba(0,87,255,0.05); }

  /* ── CABLE TABLE ── */
  table { width: 100%; border-collapse: collapse; font-size: 13px; margin-bottom: 48px; }
  thead tr { background: var(--ink); color: #fff; }
  thead th { padding: 12px 16px; text-align: left; font-family: var(--mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; font-weight: 700; }
  tbody tr { border-bottom: 1px solid var(--border); }
  tbody tr:last-child { border-bottom: none; }
  tbody tr:hover { background: var(--mist); }
  td { padding: 14px 16px; vertical-align: top; line-height: 1.5; color: var(--soft); }
  td:first-child { color: var(--ink); font-weight: 600; }
  .pin { font-family: var(--mono); font-size: 10px; font-weight: 700; color: var(--accent); background: rgba(0,87,255,0.08); padding: 2px 7px; border-radius: 4px; }

  /* ── SPEC GRID ── */
  .spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; margin-bottom: 48px; }
  .spec-row { background: var(--white); display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; }
  .spec-row:hover { background: var(--mist); }
  .spec-key { font-size: 12px; color: var(--soft); text-transform: uppercase; letter-spacing: .04em; font-weight: 600; }
  .spec-val { font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--ink); }
  @media(max-width:540px){ .spec-grid { grid-template-columns:1fr; } }

  /* ── KIT LIST ── */
  .kit { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 48px; }
  .kit li {
    display: flex; justify-content: space-between; align-items: center;
    padding: 14px 18px; border: 1px solid var(--border); border-radius: 8px;
    font-size: 14px; color: var(--ink); font-weight: 500;
  }
  .kit li:hover { background: var(--mist); }
  .kit-qty { font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--accent); background: rgba(0,87,255,0.08); padding: 3px 10px; border-radius: 100px; }



  /* ── FOOTER ── */
  footer { margin-top: 64px; padding-top: 24px; border-top: 1px solid var(--border); font-size: 12px; color: var(--soft); }

  @media(max-width:540px){
    .stats { grid-template-columns: 1fr; }
    .site-header { flex-direction: column; gap: 16px; align-items: flex-start; }
  }