:root {
      --bg: #0a0f1a;
      --card: #111827;
      --text: #e5e7eb;
      --muted: #94a3b8;
      --accent: #38bdf8;
      --accent2: #22c55e;
      --max: 1120px;
      --radius: 18px;
      --shadow: 0 10px 35px rgba(0,0,0,.28);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: Arial, Helvetica, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(56,189,248,.08), transparent 28%),
        radial-gradient(circle at top right, rgba(34,197,94,.08), transparent 24%),
        linear-gradient(180deg, var(--bg), #050814 100%);
      line-height: 1.6;
    }
    a { color: var(--accent); text-decoration: none; }
    a:hover { text-decoration: underline; }
    .wrap { width: min(100% - 32px, var(--max)); margin: 0 auto; }
    header {
      position: sticky;
      top: 0;
      z-index: 20;
      backdrop-filter: blur(12px);
      background: rgba(5,8,20,.75);
      border-bottom: 1px solid rgba(148,163,184,.12);
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding: 16px 0;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: var(--text);
      font-weight: 700;
      letter-spacing: .2px;
    }
    .mark {
      width: 12px;
      height: 12px;
      border-radius: 999px;
      background: linear-gradient(135deg, var(--accent), var(--accent2));
      box-shadow: 0 0 20px rgba(56,189,248,.55);
    }
    nav ul {
      list-style: none;
      display: flex;
      gap: 18px;
      padding: 0;
      margin: 0;
      flex-wrap: wrap;
      align-items: center;
    }
    nav a {
      color: var(--muted);
      font-size: 14px;
    }
    .cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid rgba(56,189,248,.35);
      background: linear-gradient(180deg, rgba(56,189,248,.14), rgba(56,189,248,.06));
      color: #eaf8ff;
      padding: 12px 16px;
      border-radius: 12px;
      font-weight: 700;
      box-shadow: var(--shadow);
      text-align: center;
    }
    .hero {
      padding: 84px 0 40px;
    }
    .eyebrow {
      display: inline-block;
      margin-bottom: 14px;
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(56,189,248,.1);
      color: #b9ebff;
      border: 1px solid rgba(56,189,248,.18);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: .3px;
      text-transform: uppercase;
    }
    h1, h2, h3 { line-height: 1.15; margin: 0 0 16px; }
    h1 {
      font-size: clamp(40px, 6vw, 68px);
      max-width: 980px;
      letter-spacing: -1.2px;
    }
    h2 {
      font-size: clamp(28px, 3.5vw, 42px);
      letter-spacing: -.5px;
    }
    h3 {
      font-size: 22px;
      margin-top: 24px;
    }
    .lead {
      font-size: clamp(18px, 2.2vw, 22px);
      max-width: 900px;
      color: #d1d5db;
    }
    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-top: 28px;
    }
    .ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 16px;
      border-radius: 12px;
      border: 1px solid rgba(148,163,184,.22);
      color: var(--text);
      background: rgba(255,255,255,.02);
      text-align: center;
    }
    .grid {
      display: grid;
      gap: 18px;
    }
    .grid-3 {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .grid-2 {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .section {
      padding: 34px 0;
    }
    .card {
      background: linear-gradient(180deg, rgba(17,24,39,.88), rgba(12,18,31,.92));
      border: 1px solid rgba(148,163,184,.12);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow);
    }
    .muted { color: var(--muted); }
    ul.clean {
      margin: 0;
      padding-left: 20px;
    }
    ul.clean li { margin: 8px 0; }
    .topics {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 18px;
    }
    .pill {
      padding: 9px 12px;
      border-radius: 999px;
      background: rgba(148,163,184,.08);
      border: 1px solid rgba(148,163,184,.12);
      color: #dbe3ee;
      font-size: 14px;
    }
    .quote {
      font-size: clamp(22px, 3vw, 30px);
      padding: 28px;
      border-left: 4px solid var(--accent);
      background: rgba(56,189,248,.06);
      border-radius: 16px;
    }
    .faq details {
      border: 1px solid rgba(148,163,184,.12);
      border-radius: 14px;
      padding: 16px 18px;
      background: rgba(255,255,255,.02);
    }
    .faq details + details { margin-top: 12px; }
    .faq summary {
      cursor: pointer;
      font-weight: 700;
    }
    footer {
      border-top: 1px solid rgba(148,163,184,.12);
      margin-top: 40px;
      padding: 28px 0 56px;
      color: var(--muted);
    }
    @media (max-width: 900px) {
      .grid-3, .grid-2 { grid-template-columns: 1fr; }
      nav ul { display: none; }
      .hero { padding-top: 56px; }
    }
    @media (max-width: 640px) {
      .wrap { width: min(100% - 20px, var(--max)); }
      header { position: static; }
      .nav { padding: 12px 0; }
      .hero { padding: 34px 0 22px; }
      .hero-actions { flex-direction: column; }
      .hero-actions a, .cta, .ghost { width: 100%; }
      .card { padding: 18px; border-radius: 14px; }
      .quote { padding: 20px; font-size: clamp(20px, 6vw, 26px); }
      .topics { gap: 8px; }
      .pill { font-size: 13px; }
    }