:root {
    --bg: #ffffff;
    --surface: #f6f7f9;
    --surface-2: #eef0f4;
    --text: #16181d;
    --muted: #5b6270;
    --accent: #2f6df6;
    --accent-dark: #1f52c4;
    --border: #e4e7ec;
    --radius: 14px;
    --maxw: 1080px;
  }

  *, *::before, *::after { box-sizing: border-box; }

  html { scroll-behavior: smooth; }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
  }

  h1, h2, h3 {
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin: 0 0 0.5em;
    font-weight: 650;
  }

  h1 { font-size: clamp(2rem, 5vw, 3.1rem); }
  h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); }
  h3 { font-size: 1.125rem; }

  p { margin: 0 0 1em; }

  a { color: var(--accent); text-decoration: none; }
  a:hover { text-decoration: underline; }

  .wrap {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
  }

  /* ---------- Header ---------- */

  header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 68px;
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: 0.02em;
  }
  .brand:hover { text-decoration: none; }

  nav ul {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  nav a {
    color: var(--muted);
    font-size: 0.95rem;
    font-weight: 500;
  }
  nav a:hover { color: var(--text); text-decoration: none; }

  .nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 8px 10px;
    cursor: pointer;
    color: var(--text);
  }

  /* ---------- Buttons ---------- */

  .btn {
    display: inline-block;
    padding: 11px 20px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  }
  .btn:hover { text-decoration: none; }

  .btn-primary {
    background: var(--accent);
    color: #fff;
  }
  .btn-primary:hover { background: var(--accent-dark); }

  .btn-secondary {
    background: transparent;
    color: var(--text);
    border-color: var(--border);
  }
  .btn-secondary:hover { border-color: #c9cfda; background: var(--surface); }

  /* ---------- Hero ---------- */

  .hero {
    padding: clamp(64px, 10vw, 112px) 0 clamp(56px, 8vw, 88px);
    background:
      radial-gradient(900px 420px at 12% -10%, rgba(47, 109, 246, 0.10), transparent 70%),
      radial-gradient(700px 360px at 92% 0%, rgba(47, 109, 246, 0.06), transparent 70%);
    border-bottom: 1px solid var(--border);
  }

  .hero p.lead {
    font-size: clamp(1.05rem, 2vw, 1.2rem);
    color: var(--muted);
    max-width: 620px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
  }

  .eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 650;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(47, 109, 246, 0.09);
    border-radius: 999px;
    padding: 5px 12px;
    margin-bottom: 20px;
  }

  /* ---------- Sections ---------- */

  section { padding: clamp(56px, 8vw, 88px) 0; }

  .section-head {
    max-width: 640px;
    margin-bottom: 40px;
  }
  .section-head p { color: var(--muted); margin-bottom: 0; }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
  }

  .card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px 24px;
  }

  .card p {
    color: var(--muted);
    margin-bottom: 0;
    font-size: 0.96rem;
  }

  .icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 11px;
    background: #fff;
    border: 1px solid var(--border);
    color: var(--accent);
    margin-bottom: 16px;
  }

  /* ---------- About ---------- */

  .about {
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }

  .about-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
    align-items: start;
  }

  .about p { color: var(--muted); }

  .facts {
    list-style: none;
    margin: 0;
    padding: 0;
    border-top: 1px solid var(--border);
  }

  .facts li {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
  }

  .facts span:first-child { color: var(--muted); }
  .facts span:last-child { font-weight: 600; }

  /* ---------- Contact ---------- */

  .contact-box {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(28px, 5vw, 48px);
    text-align: center;
    background: linear-gradient(180deg, #ffffff, var(--surface));
  }

  .contact-box p {
    color: var(--muted);
    max-width: 520px;
    margin: 0 auto 24px;
  }

  /* ---------- Footer ---------- */

  footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    font-size: 0.88rem;
    color: var(--muted);
  }

  .footer-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
  }

  .footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .footer-links a { color: var(--muted); }
  .footer-links a:hover { color: var(--text); text-decoration: none; }

  /* ---------- Responsive ---------- */

  @media (max-width: 780px) {
    .about-grid { grid-template-columns: 1fr; gap: 32px; }

    .nav-toggle { display: inline-flex; }

    nav {
      position: absolute;
      top: 68px;
      left: 0;
      right: 0;
      background: #fff;
      border-bottom: 1px solid var(--border);
      display: none;
    }

    nav.open { display: block; }

    nav ul {
      flex-direction: column;
      align-items: flex-start;
      gap: 0;
      padding: 8px 24px 16px;
    }

    nav li { width: 100%; }

    nav a {
      display: block;
      padding: 12px 0;
      border-bottom: 1px solid var(--border);
      font-size: 1rem;
    }

    nav li:last-child a { border-bottom: none; }
  }