:root {
    --teal: #1098AD;
    --teal-dark: #084C61;
    --teal-light: #E6F4F6;
    --charcoal: #1F2937;
    --muted: #6B7280;
    --white: #FFFFFF;
    --offwhite: #F8FAFC;
    --border: #E5EAF0;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.03);
    --shadow-md: 0 8px 30px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 20px 60px rgba(15, 23, 42, 0.10);
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    font-family: 'Inter', -apple-system, sans-serif;
    color: var(--charcoal);
    background: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  h1, h2, h3, .display {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--charcoal);
  }
  a { text-decoration: none; color: inherit; }
  img { max-width: 100%; display: block; }
  .container { max-width: 1120px; margin: 0 auto; padding: 0 32px; }
  @media (max-width: 640px) { .container { padding: 0 20px; } }
  .visually-hidden {
    position: absolute; width: 1px; height: 1px; overflow: hidden;
    clip: rect(0 0 0 0); white-space: nowrap;
  }
  .skip-link {
    position: absolute; top: -60px; left: 12px;
    background: var(--charcoal); color: var(--white);
    padding: 10px 16px; border-radius: 8px; z-index: 999;
    font-size: 14px; transition: top 0.2s ease;
  }
  .skip-link:focus { top: 12px; }

  .reveal {
    opacity: 0; transform: translateY(24px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .reveal.visible { opacity: 1; transform: translateY(0); }
  @media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
    html { scroll-behavior: auto; }
  }

  .nav {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
  }
  .nav.scrolled { border-bottom-color: var(--border); box-shadow: 0 1px 0 rgba(15,23,42,0.02); }
  .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
  .nav-logo { display: flex; align-items: center; gap: 10px; }
  .nav-logo-word {
    font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 23px;
    letter-spacing: -0.02em; color: var(--charcoal); line-height: 1;
  }
  .nav-links { display: flex; align-items: center; gap: 40px; }
  .nav-links a { font-size: 14.5px; font-weight: 500; color: var(--muted); transition: color 0.2s ease; }
  .nav-links a:hover, .nav-links a:focus-visible { color: var(--charcoal); }
  .nav-cta {
    background: var(--charcoal); color: var(--white) !important;
    padding: 10px 20px; border-radius: 8px; font-size: 14px; font-weight: 500;
    transition: background 0.2s ease, transform 0.2s ease;
  }
  .nav-cta:hover { background: var(--teal-dark); transform: translateY(-1px); }
  .nav-toggle { display: none; }
  @media (max-width: 860px) {
    .nav-links-desktop { display: none; }
    .nav-toggle {
      display: flex; align-items: center; justify-content: center;
      background: none; border: none; cursor: pointer; padding: 8px;
      width: 44px; height: 44px;
    }
  }
  .mobile-menu {
    position: fixed; top: 72px; left: 0; right: 0;
    background: var(--white); border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md); padding: 20px 24px 28px;
    display: flex; flex-direction: column; gap: 4px;
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: transform 0.25s cubic-bezier(0.16,1,0.3,1), opacity 0.25s ease;
    z-index: 99;
  }
  .mobile-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .mobile-menu a { padding: 14px 4px; font-size: 15.5px; font-weight: 500; color: var(--charcoal); border-bottom: 1px solid var(--border); }
  .mobile-menu a:last-child { border-bottom: none; }
  .mobile-menu .nav-cta { text-align: center; margin-top: 10px; border-bottom: none; }
  @media (min-width: 861px) { .mobile-menu { display: none; } }

  .pulse-mark { position: relative; width: 32px; height: 32px; flex-shrink: 0; }
  .pulse-mark svg { width: 100%; height: 100%; overflow: visible; }
  .pulse-ring { fill: none; stroke: var(--teal); transform-origin: center; animation: pulse-expand 3s cubic-bezier(0.16, 1, 0.3, 1) infinite; }
  .pulse-ring.r2 { animation-delay: 1s; }
  .pulse-ring.r3 { animation-delay: 2s; }
  .pulse-dot { fill: var(--teal); }
  @keyframes pulse-expand {
    0% { opacity: 0.9; transform: scale(0.35); }
    70% { opacity: 0; }
    100% { opacity: 0; transform: scale(1); }
  }
  @media (prefers-reduced-motion: reduce) { .pulse-ring { animation: none; opacity: 0.5; } }

  .hero { padding: 128px 0 96px; position: relative; overflow: hidden; }
  .hero-inner { max-width: 780px; margin: 0 auto; text-align: center; position: relative; z-index: 2; }
  .eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--teal-light); color: var(--teal-dark);
    font-size: 13px; font-weight: 500; padding: 6px 14px; border-radius: 100px; margin-bottom: 28px;
  }
  .eyebrow-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); animation: dot-blink 2s ease-in-out infinite; }
  @keyframes dot-blink { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
  @media (prefers-reduced-motion: reduce) { .eyebrow-dot { animation: none; } }
  .hero h1 { font-size: clamp(38px, 6vw, 62px); line-height: 1.1; letter-spacing: -0.03em; margin-bottom: 24px; }
  .hero h1 .accent { color: var(--teal); }
  .hero p.sub { font-size: 19px; color: var(--muted); max-width: 600px; margin: 0 auto 40px; line-height: 1.55; }
  .hero-ctas { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-bottom: 88px; }
  .btn-primary, .btn-secondary {
    padding: 14px 28px; border-radius: 10px; font-size: 15px; font-weight: 500;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1); display: inline-flex; align-items: center; gap: 8px;
  }
  .btn-primary { background: var(--charcoal); color: var(--white); box-shadow: var(--shadow-sm); }
  .btn-primary:hover, .btn-primary:focus-visible { background: var(--teal-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
  .btn-secondary { background: var(--white); color: var(--charcoal); border: 1px solid var(--border); }
  .btn-secondary:hover, .btn-secondary:focus-visible { border-color: var(--charcoal); transform: translateY(-2px); }

  .hero-visual {
    position: relative; width: 100%; max-width: 640px; margin: 0 auto;
    aspect-ratio: 16/10; border-radius: 20px;
    background:
      radial-gradient(ellipse at 50% 40%, #EFF7F8 0%, var(--offwhite) 55%, #EEF3F5 100%);
    border: 1px solid var(--border); box-shadow: var(--shadow-lg); overflow: hidden;
  }
  .presence-field { position: absolute; inset: 0; }
  .presence-node {
    position: absolute; width: 6px; height: 6px; margin: -3px 0 0 -3px; border-radius: 50%;
    background: var(--teal); opacity: 0.28;
    box-shadow: 0 0 0 0 rgba(16,152,173,0);
    transition: opacity 1.6s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 1.6s cubic-bezier(0.16, 1, 0.3, 1), transform 1.6s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .presence-node.lit {
    opacity: 1;
    box-shadow: 0 0 0 5px rgba(16,152,173,0.10), 0 0 14px 2px rgba(16,152,173,0.35);
    transform: scale(1.35);
  }
  .presence-ring {
    position: absolute; border: 1px solid rgba(16,152,173,0.55); border-radius: 50%;
    opacity: 0; pointer-events: none;
  }
  @keyframes presence-expand {
    0% { opacity: 0.42; transform: scale(0.08); border-width: 1.5px; }
    65% { opacity: 0.14; }
    100% { opacity: 0; transform: scale(1); border-width: 0.5px; }
  }
  @media (prefers-reduced-motion: reduce) {
    .presence-ring { animation: none !important; display: none; }
    .presence-node { opacity: 0.5; box-shadow: none; transform: none; }
  }

  .proof-strip { padding: 40px 0 88px; text-align: center; }
  .proof-label { font-size: 12.5px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 20px; }
  .proof-pills { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
  .proof-pill { font-size: 13.5px; font-weight: 500; color: var(--teal-dark); background: var(--teal-light); padding: 8px 16px; border-radius: 100px; }

  section { padding: 108px 0; }
  .section-alt { background: var(--offwhite); }
  .section-head { max-width: 640px; margin: 0 auto 64px; text-align: center; }
  .section-eyebrow { font-size: 13px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--teal); margin-bottom: 14px; }
  .section-head h2 { font-size: clamp(28px, 4vw, 38px); line-height: 1.18; margin-bottom: 16px; }
  .section-head p { font-size: 17px; color: var(--muted); line-height: 1.6; }

  .problem-block { max-width: 720px; margin: 0 auto; text-align: center; }
  .problem-block .lede {
    font-size: 22px; line-height: 1.55; font-family: 'Space Grotesk', sans-serif;
    font-weight: 500; color: var(--charcoal); margin-bottom: 28px;
  }
  .problem-block .body-text { font-size: 16.5px; color: var(--muted); line-height: 1.7; }
  .problem-block .closer {
    margin-top: 28px; font-size: 17px; font-weight: 600; color: var(--teal-dark);
    font-family: 'Space Grotesk', sans-serif;
  }

  .why-block { max-width: 780px; margin: 0 auto; text-align: center; }
  .why-block .lede {
    font-size: 22px; line-height: 1.5; color: var(--charcoal);
    font-family: 'Space Grotesk', sans-serif; font-weight: 500;
  }
  .why-block .lede .teal { color: var(--teal); }

  .split-section { max-width: 900px; margin: 0 auto; text-align: center; }
  .split-section .section-eyebrow { margin-bottom: 14px; }
  .split-section h2 { font-size: clamp(26px, 3.6vw, 34px); margin-bottom: 24px; }
  .split-section .body-text {
    font-size: 16.5px; color: var(--muted); line-height: 1.75;
    max-width: 620px; margin: 0 auto; text-align: center;
  }
  .split-section .body-text p { margin-bottom: 14px; }
  .split-section .body-text p:last-child { margin-bottom: 0; }

  .flow { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 0; max-width: 960px; margin: 0 auto; }
  .flow-step {
    background: var(--white); border: 1px solid var(--border); border-radius: 14px;
    padding: 24px 22px; width: 168px; text-align: center; box-shadow: var(--shadow-sm);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
  }
  .flow-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
  .flow-step .icon-wrap {
    width: 44px; height: 44px; border-radius: 12px; background: var(--teal-light);
    display: flex; align-items: center; justify-content: center; margin: 0 auto 14px;
  }
  .flow-step h5 { font-family: 'Space Grotesk', sans-serif; font-size: 15px; font-weight: 600; }
  .flow-arrow { color: var(--border); font-size: 20px; padding: 0 6px; flex-shrink: 0; }
  @media (max-width: 860px) {
    .flow { flex-direction: column; }
    .flow-arrow { transform: rotate(90deg); padding: 8px 0; }
  }

  .feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
  .feature-card {
    background: var(--white); border: 1px solid var(--border); border-radius: 16px; padding: 32px;
    transition: transform 0.25s cubic-bezier(0.16,1,0.3,1), box-shadow 0.25s ease, border-color 0.25s ease;
  }
  .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(16,152,173,0.3); }
  .feature-card .icon-wrap {
    width: 46px; height: 46px; border-radius: 12px; background: var(--teal-light);
    display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
  }
  .feature-card h4 { font-family: 'Space Grotesk', sans-serif; font-size: 17px; font-weight: 600; margin-bottom: 6px; }
  .feature-card .outcome {
    font-size: 12px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase;
    color: var(--teal); margin-bottom: 10px; display: block;
  }
  .feature-card p { font-size: 14.5px; color: var(--muted); line-height: 1.6; }

  .vision-section { background: var(--teal-dark); color: var(--white); position: relative; overflow: hidden; }
  .vision-inner { max-width: 700px; margin: 0 auto; text-align: center; position: relative; z-index: 2; }
  .vision-section .section-eyebrow { color: #7FC4D3; }
  .vision-section h2 { color: var(--white); }
  .vision-section p.lede {
    font-size: 22px; line-height: 1.6; color: #DCEEF1;
    font-family: 'Space Grotesk', sans-serif; font-weight: 500;
  }
  .vision-bg-ring { position: absolute; border: 1px solid rgba(255,255,255,0.08); border-radius: 50%; }

  .whynow-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 28px; max-width: 880px; margin: 0 auto; }
  .whynow-item { text-align: left; }
  .whynow-item .tick { color: var(--teal); font-weight: 700; margin-right: 6px; }
  .whynow-item h5 { font-family: 'Space Grotesk', sans-serif; font-size: 15.5px; font-weight: 600; margin-bottom: 6px; }
  .whynow-item p { font-size: 14px; color: var(--muted); line-height: 1.55; }

  .security-wrap {
    max-width: 720px; margin: 0 auto; background: var(--white); border: 1px solid var(--border);
    border-radius: 20px; padding: 48px; box-shadow: var(--shadow-md); text-align: center;
  }
  .security-wrap .icon-wrap {
    width: 52px; height: 52px; border-radius: 14px; background: var(--teal-light);
    display: flex; align-items: center; justify-content: center; margin: 0 auto 22px;
  }
  .security-wrap p { color: var(--muted); font-size: 15.5px; line-height: 1.65; max-width: 540px; margin: 0 auto; }

  .faq-list { max-width: 720px; margin: 0 auto; }
  .faq-item { border-bottom: 1px solid var(--border); }
  .faq-item:first-child { border-top: 1px solid var(--border); }
  .faq-q {
    width: 100%; text-align: left; background: none; border: none; padding: 24px 4px;
    font-family: 'Space Grotesk', sans-serif; font-size: 16.5px; font-weight: 500; color: var(--charcoal);
    cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 20px;
  }
  .faq-q .plus { flex-shrink: 0; width: 22px; height: 22px; position: relative; transition: transform 0.3s ease; }
  .faq-q .plus::before, .faq-q .plus::after { content: ''; position: absolute; background: var(--muted); transition: background 0.2s ease; }
  .faq-q .plus::before { top: 50%; left: 0; width: 100%; height: 1.5px; transform: translateY(-50%); }
  .faq-q .plus::after { left: 50%; top: 0; height: 100%; width: 1.5px; transform: translateX(-50%); }
  .faq-item.open .plus { transform: rotate(45deg); }
  .faq-item.open .plus::before, .faq-item.open .plus::after { background: var(--teal); }
  .faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s cubic-bezier(0.16,1,0.3,1); }
  .faq-a-inner { padding: 0 4px 24px; font-size: 14.5px; color: var(--muted); line-height: 1.65; max-width: 600px; }

  .waitlist-section { text-align: center; }
  .waitlist-wrap { max-width: 540px; margin: 0 auto; }
  .waitlist-form { display: flex; gap: 10px; margin-top: 32px; }
  .waitlist-form input {
    flex: 1; padding: 14px 18px; border-radius: 10px; border: 1px solid var(--border);
    font-family: 'Inter', sans-serif; font-size: 14.5px; color: var(--charcoal); background: var(--white);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }
  .waitlist-form input:focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px rgba(16,152,173,0.14); }
  .waitlist-form button {
    background: var(--charcoal); color: var(--white); border: none; padding: 14px 26px; border-radius: 10px;
    font-family: 'Inter', sans-serif; font-size: 14.5px; font-weight: 500; cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease; white-space: nowrap;
  }
  .waitlist-form button:hover { background: var(--teal-dark); transform: translateY(-1px); }
  .waitlist-note { font-size: 12.5px; color: var(--muted); margin-top: 14px; }
  .waitlist-error {
    font-size: 13px; color: #B91C1C; margin-top: 12px; min-height: 0;
    display: none;
  }
  .waitlist-error.visible { display: block; }
  .waitlist-form button:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
  @media (max-width: 520px) { .waitlist-form { flex-direction: column; } }

  footer { border-top: 1px solid var(--border); padding: 56px 0 40px; }
  .footer-top { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 40px; margin-bottom: 40px; }
  .footer-brand { max-width: 280px; }
  .footer-brand p { font-size: 13.5px; color: var(--muted); margin-top: 12px; line-height: 1.6; }
  .footer-logo-word { font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 19px; letter-spacing: -0.02em; }
  .footer-cols { display: flex; gap: 64px; flex-wrap: wrap; }
  .footer-col h6 { font-size: 12.5px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--charcoal); margin-bottom: 16px; }
  .footer-col a { display: block; font-size: 14px; color: var(--muted); margin-bottom: 12px; transition: color 0.2s ease; }
  .footer-col a:hover { color: var(--teal); }
  .footer-bottom {
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
    padding-top: 28px; border-top: 1px solid var(--border); font-size: 13px; color: var(--muted);
  }
  .footer-social { display: flex; gap: 16px; }
  .footer-social a { color: var(--muted); transition: color 0.2s ease; }
  .footer-social a:hover { color: var(--teal); }