:root {
  --teal: #1F4E5B;
  --teal-dark: #12323B;
  --white: #FFFFFF;
  --neutral-50: #F7FAFA;
  --neutral-100: #EEF4F4;
  --neutral-200: #DCE8EA;
  --neutral-700: #385761;
  --shadow: 0 24px 60px rgba(31, 78, 91, 0.16);
  --radius: 24px;
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--teal);
  background: var(--white);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
}

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

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 10;
  padding: 10px 14px;
  color: var(--white);
  background: var(--teal);
  border-radius: 999px;
}

.skip-link:focus {
  top: 16px;
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.narrow {
  max-width: 900px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--neutral-200);
  backdrop-filter: blur(16px);
}

.nav-shell {
  width: 100%;
  max-width: 1200px;
  min-height: 86px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand img {
  width: 330px;
}

.nav-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 900;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.nav-cta,
.btn-primary {
  color: var(--white);
  background: var(--teal);
  box-shadow: 0 14px 34px rgba(31, 78, 91, 0.22);
}

.btn-secondary {
  color: var(--teal);
  background: transparent;
  border: 2px solid var(--teal);
}

.nav-cta:hover,
.btn:hover {
  transform: translateY(-2px);
}

.hero {
  padding: 78px 0 76px;
  background:
    radial-gradient(circle at 80% 16%, rgba(31, 78, 91, 0.12), transparent 32%),
    linear-gradient(180deg, var(--white), var(--neutral-50));
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.78fr);
  gap: clamp(36px, 5vw, 64px);
  align-items: center;
}

.hero-copy {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 0.72rem;
  font-weight: 950;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 620px;
  margin-bottom: 20px;
  color: var(--teal-dark);
  font-size: clamp(2.25rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: 0;
}

h2 {
  color: var(--teal-dark);
  font-size: clamp(1.8rem, 3vw, 2.25rem);
  line-height: 1.16;
  letter-spacing: 0;
}

h3 {
  color: var(--teal-dark);
  font-size: clamp(1.35rem, 1.8vw, 1.5rem);
  line-height: 1.2;
}

.lede {
  max-width: 600px;
  color: var(--neutral-700);
  font-size: clamp(1.05rem, 1.35vw, 1.125rem);
  line-height: 1.62;
}

.price-callout,
.price-lock {
  display: inline-flex;
  width: fit-content;
  max-width: 100%;
  padding: 11px 15px;
  border: 1px solid rgba(31, 78, 91, 0.18);
  border-radius: 999px;
  color: var(--teal-dark);
  background: var(--white);
  box-shadow: var(--shadow);
  font-size: 0.98rem;
  font-weight: 950;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.hero-visual {
  display: grid;
  gap: 18px;
  min-height: 440px;
  padding: 28px;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
}

.phone-card,
.pc-card,
.vault-card {
  display: grid;
  place-items: center;
  min-height: 110px;
  border-radius: 20px;
  color: var(--white);
  background: var(--teal);
  font-size: 1.08rem;
  font-weight: 950;
}

.pc-card {
  color: var(--teal);
  background: var(--neutral-100);
  border: 2px solid var(--teal);
}

.vault-card {
  background: var(--teal-dark);
}

.signal-line {
  width: 3px;
  height: 46px;
  margin: -4px auto;
  background: var(--teal);
  border-radius: 999px;
}

.story-section,
.antidote-section,
.vault-section,
.proof-section,
.closing-section {
  padding: 92px 0;
}

.story-copy {
  display: grid;
  gap: 20px;
  color: var(--neutral-700);
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: 1.65;
}

.antidote-section,
.closing-section {
  background: var(--neutral-50);
}

.section-heading {
  max-width: 800px;
  margin-bottom: 42px;
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.benefit-grid article {
  padding-top: 26px;
  border-top: 4px solid var(--teal);
}

.benefit-grid p,
.vault-panel p,
.proof-grid p,
.closing-card p {
  color: var(--neutral-700);
  font-size: 1.05rem;
  line-height: 1.62;
}

.vault-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.1fr);
  gap: 48px;
  padding: 48px;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--neutral-50), var(--neutral-100));
}

.proof-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(360px, 1fr);
  gap: 64px;
  align-items: start;
}

.proof-list {
  display: grid;
  gap: 24px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.proof-list li {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--neutral-200);
}

.proof-list strong,
.proof-list span {
  display: block;
}

.proof-list strong {
  color: var(--teal-dark);
  font-size: 1.05rem;
}

.proof-list span {
  margin-top: 6px;
  color: var(--neutral-700);
  font-size: 1rem;
  line-height: 1.6;
}

.store-actions {
  display: grid;
  gap: 12px;
  justify-items: start;
  margin-top: 24px;
}

.app-store-badge {
  display: inline-grid;
  min-width: 176px;
  min-height: 56px;
  padding: 8px 18px;
  border-radius: 14px;
  color: var(--white);
  background: #000000;
  text-decoration: none;
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.18);
}

.app-store-badge span {
  font-size: 0.72rem;
  line-height: 1;
}

.app-store-badge strong {
  font-size: 1.45rem;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.app-store-badge-disabled {
  cursor: not-allowed;
  opacity: 0.72;
}

.store-actions p {
  max-width: 360px;
  margin: 0;
  color: var(--neutral-700);
  font-size: 0.95rem;
}

.closing-card {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

.closing-card .btn {
  margin-top: 18px;
}

.site-footer {
  padding: 34px 0;
  color: var(--white);
  background: var(--teal-dark);
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-grid p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.95rem;
}

.footer-brand-line {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand-line img {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.92;
}

.footer-brand-line a {
  color: var(--white);
  font-weight: 800;
  text-decoration-color: rgba(255, 255, 255, 0.45);
  text-underline-offset: 3px;
}

@media (max-width: 900px) {
  .hero-grid,
  .benefit-grid,
  .vault-panel,
  .proof-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 62px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero-visual {
    min-height: auto;
  }

  .footer-grid {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-brand-line {
    align-items: flex-start;
  }
}

@media (max-width: 620px) {
  .nav-shell {
    min-height: 78px;
  }

  .brand img {
    width: 190px;
  }

  .nav-cta {
    min-height: 40px;
    padding: 0 12px;
    font-size: 0.82rem;
  }

  h1 {
    font-size: clamp(2rem, 9vw, 2.65rem);
  }

  .actions,
  .btn {
    width: 100%;
  }

  .story-section,
  .antidote-section,
  .vault-section,
  .proof-section,
  .closing-section {
    padding: 66px 0;
  }

  .vault-panel {
    padding: 30px;
  }
}