:root {
    --navy-950: #0a1628;
    --navy-900: #0d1f36;
    --navy-800: #122b4a;
    --navy-700: #1a3a5c;
    --blue-500: #2f7de1;
    --blue-400: #4f97f5;
    --blue-300: #7fb4f7;
    --white: #ffffff;
    --gray-100: #f4f7fb;
    --gray-300: #c9d4e0;
    --gray-500: #7c8ba1;

    /* Semantic tokens: adapt automatically to the OS light/dark setting below */
    --bg-page: #ffffff;
    --surface: var(--gray-100);
    --field-bg: var(--gray-100);
    --text-heading: var(--navy-950);
    --text-default: var(--navy-900);
    --text-body: #4b5b72;
    --border-subtle: #e6ecf3;
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --bg-page: #0b1725;
      --surface: #13233a;
      --field-bg: #0a1628;
      --text-heading: #eef2f8;
      --text-default: #dbe3ee;
      --text-body: #aebbcd;
      --border-subtle: #253a54;
    }
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }

  html { scroll-behavior: smooth; }

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-default);
    background: var(--bg-page);
    line-height: 1.6;
  }

  a { color: inherit; text-decoration: none; }

  img { max-width: 100%; display: block; }

  .container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
  }

  /* Header */
  header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--navy-950);
    border-bottom: 1px solid var(--navy-700);
  }

  .nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    max-width: 1140px;
    margin: 0 auto;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--white);
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: 0.02em;
  }

  .logo-mark {
    width: 34px;
    height: 34px;
    flex-shrink: 0;
  }

  nav ul {
    list-style: none;
    display: flex;
    gap: 28px;
  }

  nav a {
    color: var(--gray-300);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.15s ease;
  }

  nav a:hover { color: var(--white); }

  nav a.active {
    color: var(--white);
    position: relative;
  }

  nav a.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -6px;
    height: 2px;
    background: var(--blue-500);
    border-radius: 2px;
  }

  .nav-cta.active::after { display: none; }

  .nav-cta {
    background: var(--blue-500);
    color: var(--white) !important;
    padding: 9px 18px;
    border-radius: 6px;
    font-weight: 600;
  }

  .nav-cta:hover { background: var(--blue-400); }

  .nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.6rem;
    line-height: 1;
    padding: 10px;
    margin: -10px;
    cursor: pointer;
  }

  /* Hero */
  .hero {
    background: linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 100%);
    color: var(--white);
    padding: 88px 0 96px;
    position: relative;
    overflow: hidden;
  }

  .hero::after {
    content: "";
    position: absolute;
    top: -120px;
    right: -120px;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(47,125,225,0.25) 0%, rgba(47,125,225,0) 70%);
  }

  .hero-inner {
    max-width: 680px;
    position: relative;
    z-index: 1;
  }

  .eyebrow {
    display: inline-block;
    color: var(--blue-300);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 18px;
  }

  .hero h1 {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
  }

  .hero h1 span { color: var(--blue-400); }

  .hero p {
    font-size: 1.15rem;
    color: var(--gray-300);
    margin-bottom: 34px;
    max-width: 560px;
  }

  .btn-row { display: flex; gap: 14px; flex-wrap: wrap; }

  .btn {
    display: inline-block;
    padding: 13px 26px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.98rem;
    transition: all 0.15s ease;
  }

  .btn-primary {
    background: var(--blue-500);
    color: var(--white);
  }

  .btn-primary:hover { background: var(--blue-400); }

  .btn-secondary {
    background: transparent;
    color: var(--white);
    border: 1px solid var(--navy-700);
  }

  .btn-secondary:hover { border-color: var(--blue-400); color: var(--blue-300); }

  .hero-platforms {
    margin-top: 40px;
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
    justify-content: center;
    color: var(--gray-500);
    font-size: 0.9rem;
  }

  .hero-platforms span {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--blue-400);
  }

  /* Section shared */
  section { padding: 80px 0; }

  .section-head {
    text-align: center;
    max-width: 620px;
    margin: 0 auto 52px;
  }

  .section-head .eyebrow { color: var(--blue-500); }

  .section-head h2 {
    font-size: 2.1rem;
    font-weight: 800;
    color: var(--text-heading);
    margin-bottom: 14px;
  }

  .section-head p { color: var(--text-body); font-size: 1.05rem; }

  /* Services grid */
  .services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .service-card {
    background: var(--surface);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 30px 26px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
  }

  .service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(10,22,40,0.08);
  }

  .service-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--navy-800), var(--blue-500));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.35rem;
    margin-bottom: 18px;
  }

  .service-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 10px;
  }

  .service-card p {
    color: var(--text-body);
    font-size: 0.94rem;
  }

  .service-tag {
    display: inline-block;
    margin-top: 14px;
    background: rgba(47,125,225,0.08);
    color: var(--blue-500);
    font-size: 0.78rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 999px;
    letter-spacing: 0.02em;
  }

  .referral-note {
    margin-top: 36px;
    background: var(--surface);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 22px 28px;
    text-align: center;
    color: var(--text-body);
    font-size: 0.98rem;
  }

  .referral-note strong { color: var(--text-heading); }

  .referral-note a {
    color: var(--blue-500);
    font-weight: 700;
    text-decoration: underline;
  }

  .referral-note a:hover { color: var(--blue-400); }

  /* Platforms */
  .platforms {
    background: var(--navy-950);
    color: var(--white);
  }

  .platforms .section-head p { color: var(--gray-300); }
  .platforms .section-head h2 { color: var(--white); }

  .platform-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(220px, 300px));
    justify-content: center;
    gap: 20px;
  }

  .platform-card {
    background: var(--navy-900);
    border: 1px solid var(--navy-700);
    border-radius: 12px;
    padding: 34px 24px;
    text-align: center;
  }

  .platform-card .glyph {
    font-size: 2.2rem;
    margin-bottom: 14px;
  }

  .platform-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .platform-card p { color: var(--gray-300); font-size: 0.9rem; }

  .os-tags {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 44px;
    flex-wrap: wrap;
  }

  .os-tag {
    background: var(--navy-800);
    border: 1px solid var(--navy-700);
    color: var(--blue-300);
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 600;
  }

  /* Pricing */
  .pricing-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .price-card {
    background: var(--surface);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 32px 30px;
  }

  .price-card h3 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-heading);
    margin-bottom: 6px;
  }

  .price-card-sub {
    color: var(--text-body);
    font-size: 0.9rem;
    margin-bottom: 22px;
  }

  .price-list { list-style: none; }

  .price-list li {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 16px;
    padding: 12px 0;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-heading);
    font-size: 0.95rem;
  }

  .price-list li:first-child { border-top: none; padding-top: 0; }

  .price-list li em {
    display: block;
    color: var(--text-body);
    font-style: normal;
    font-size: 0.82rem;
    margin-top: 2px;
  }

  .price-value {
    font-weight: 700;
    color: var(--blue-500);
    white-space: nowrap;
  }

  .price-rate {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-body);
    font-size: 0.9rem;
  }

  .price-rate strong { color: var(--text-heading); }

  #pricing .referral-note { text-align: left; }

  /* Why us / about */
  .about {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
  }

  .about-text, .about-stats { min-width: 0; }

  .about-text .eyebrow { color: var(--blue-500); }

  .about-text h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-heading);
    margin-bottom: 18px;
  }

  .about-text p {
    color: var(--text-body);
    font-size: 1.02rem;
    margin-bottom: 16px;
  }

  .about-list { list-style: none; margin-top: 24px; }

  .about-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
    color: var(--text-heading);
    font-weight: 500;
  }

  .check {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--blue-500);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
    margin-top: 2px;
  }

  .about-stats {
    background: var(--surface);
    border-radius: 16px;
    padding: 36px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .about-stats > div { min-width: 0; }

  .stat-num {
    font-size: 2.1rem;
    font-weight: 800;
    color: var(--blue-500);
    overflow-wrap: break-word;
  }

  .stat-label {
    color: var(--text-body);
    font-size: 0.9rem;
    margin-top: 4px;
  }

  /* Process */
  .process {
    background: var(--surface);
  }

  .process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    counter-reset: step;
  }

  .process-card {
    position: relative;
    background: var(--bg-page);
    border-radius: 12px;
    padding: 30px 22px;
    border: 1px solid var(--border-subtle);
  }

  .process-num {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--blue-500);
    letter-spacing: 0.05em;
    margin-bottom: 14px;
  }

  .process-card h3 {
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 8px;
  }

  .process-card p { color: var(--text-body); font-size: 0.9rem; }

  /* Contact / CTA */
  .contact {
    background: linear-gradient(135deg, var(--navy-950), var(--navy-800));
    color: var(--white);
  }

  .contact-inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: start;
  }

  .contact-info, .contact-inner form { min-width: 0; }

  .contact-info h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 16px;
  }

  .contact-info p {
    color: var(--gray-300);
    margin-bottom: 28px;
    max-width: 460px;
  }

  .contact-detail {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
    color: var(--gray-100);
    font-size: 0.98rem;
  }

  .contact-detail .ico {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    background: var(--navy-700);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }

  form {
    background: var(--surface);
    border-radius: 14px;
    padding: 32px;
    color: var(--text-heading);
  }

  .form-row { margin-bottom: 16px; }

  .form-row label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-heading);
  }

  .form-row input,
  .form-row textarea,
  .form-row select {
    width: 100%;
    padding: 11px 13px;
    border: 1px solid var(--border-subtle);
    border-radius: 7px;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-default);
    background: var(--field-bg);
  }

  .form-row textarea { resize: vertical; min-height: 90px; }

  form .btn-primary {
    width: 100%;
    border: none;
    cursor: pointer;
    font-size: 1rem;
  }

  .form-note {
    font-size: 0.8rem;
    color: var(--text-body);
    margin-top: 12px;
    text-align: center;
  }

  /* Footer */
  footer {
    background: var(--navy-950);
    color: var(--gray-500);
    padding: 40px 0 28px;
    border-top: 1px solid var(--navy-700);
  }

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

  .footer-logo {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--white);
    font-weight: 700;
  }

  .footer-logo-mark {
    width: 46px;
    height: 46px;
    flex-shrink: 0;
  }

  .footer-logo-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 0.01em;
  }

  .footer-logo-sub {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--gray-500);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    margin-top: 3px;
  }

  .footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 22px;
    list-style: none;
    font-size: 0.9rem;
  }

  .footer-bottom {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--navy-800);
    font-size: 0.82rem;
    text-align: center;
  }

  .footer-logo-sub a,
  .footer-bottom a {
    text-decoration: underline;
    text-underline-offset: 2px;
  }

  .footer-logo-sub a:hover,
  .footer-bottom a:hover {
    color: var(--blue-300);
  }

  /* Responsive */
  @media (max-width: 1000px) {
    nav ul:not(.mobile-open) { display: none; }
    .nav-toggle { display: block; }
    nav { position: absolute; top: 100%; left: 0; right: 0; background: var(--navy-950); border-bottom: 1px solid var(--navy-700); }
    nav ul { flex-direction: column; padding: 20px 24px; gap: 18px; }
  }

  @media (max-width: 860px) {
    .hero h1 { font-size: 2.1rem; }
    .services-grid, .platform-grid, .process-grid, .pricing-grid { grid-template-columns: 1fr 1fr; }
    .about, .contact-inner { grid-template-columns: 1fr; }
  }

  @media (max-width: 560px) {
    .services-grid, .platform-grid, .process-grid, .pricing-grid { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: 1fr 1fr; padding: 24px; gap: 20px; }
    .btn-row { flex-direction: column; }
    .btn { text-align: center; }
    section { padding: 56px 0; }
    .hero { padding: 64px 0 72px; }
    .hero h1 { font-size: 1.85rem; }
    .hero p { font-size: 1.05rem; }
    .section-head { margin-bottom: 36px; }
    .section-head h2 { font-size: 1.7rem; }
    .about-text h2 { font-size: 1.6rem; }
    .contact-info h2 { font-size: 1.6rem; }
    .stat-num { font-size: 1.7rem; }
    form { padding: 24px; }
  }

  @media (max-width: 420px) {
    .about-stats { grid-template-columns: 1fr; }
  }

  @media (max-width: 365px) {
    .logo-text { display: none; }
  }

  /* Meet the owner */
  #owner {
    border-top: 1px solid var(--border-subtle);
  }

  #owner .about-text p a {
    color: var(--blue-500);
    text-decoration: underline;
    text-underline-offset: 2px;
  }

  #owner .about-text p a:hover {
    color: var(--blue-400);
  }