.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 24px clamp(24px, 4vw, 64px);
  pointer-events: none;
}

.site-brand,
.site-nav a {
  pointer-events: auto;
}

.site-brand {
  display: none;
}

.site-nav {
  display: flex;
  gap: clamp(18px, 2.4vw, 36px);
  font-family: var(--font-sans);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav a {
  color: var(--color-muted);
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--color-ink);
}

.opening-spread {
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  padding: clamp(214px, 21vh, 280px) clamp(28px, 4vw, 72px) clamp(72px, 9vw, 128px);
}

.opening-copy {
  position: relative;
  z-index: 2;
  width: min(43vw, 650px);
}

.brand-mark {
  position: absolute;
  top: clamp(28px, 4vw, 58px);
  left: 0;
  margin-bottom: 0;
}

.brand-name {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-ink);
}

.brand-rule {
  width: 56px;
  height: 2px;
  margin-top: 13px;
  background: var(--color-gold);
}

.opening-headline {
  margin: 0;
  font-size: clamp(4.25rem, 7.1vw, 8.4rem);
  line-height: 0.88;
  letter-spacing: -0.072em;
  font-weight: 400;
}

.opening-headline span {
  color: var(--color-muted);
}

.opening-line {
  max-width: 470px;
  margin: clamp(28px, 4vh, 48px) 0 0;
  font-size: clamp(1.28rem, 1.55vw, 1.78rem);
  line-height: 1.28;
  color: var(--color-muted);
}

.opening-image {
  position: absolute;
  z-index: 1;
  top: clamp(128px, 15vh, 190px);
  left: clamp(500px, 38vw, 610px);
  width: clamp(900px, 62vw, 1160px);
}

.opening-image img {
  display: block;
  width: 100%;
  height: auto;
  filter: brightness(1.04) contrast(1.02) saturate(1.02);
  -webkit-mask-image:
    linear-gradient(to right, transparent 0%, rgba(0,0,0,0.28) 2%, rgba(0,0,0,0.88) 7%, black 12%, black 100%),
    linear-gradient(to bottom, black 0%, black 93%, rgba(0,0,0,0.75) 98%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image:
    linear-gradient(to right, transparent 0%, rgba(0,0,0,0.28) 2%, rgba(0,0,0,0.88) 7%, black 12%, black 100%),
    linear-gradient(to bottom, black 0%, black 93%, rgba(0,0,0,0.75) 98%, transparent 100%);
  mask-composite: intersect;
}

.chapter {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(320px, 1fr);
  gap: clamp(42px, 7vw, 112px);
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(92px, 11vw, 164px) clamp(28px, 4vw, 72px);
}

.chapter-narrow {
  display: block;
  max-width: 860px;
}

.chapter-label {
  margin: 0 0 18px;
  font-family: var(--font-sans);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold-deep);
}

.chapter h2,
.trust-section h2,
.final-cta h2 {
  margin: 0;
  font-size: clamp(2.8rem, 5.1vw, 6rem);
  line-height: 0.96;
  letter-spacing: -0.055em;
  font-weight: 400;
}

.chapter-body {
  font-size: clamp(1.28rem, 1.7vw, 1.72rem);
  line-height: 1.52;
  color: var(--color-muted);
}

.chapter-body p {
  margin: 0 0 1.15em;
}

.chapter-body p:last-child {
  margin-bottom: 0;
}

.large-body {
  max-width: 760px;
  margin-top: 34px;
  font-size: clamp(1.45rem, 2.1vw, 2.18rem);
}

.statement-band {
  max-width: 1120px;
  margin: 0 auto;
  padding: clamp(78px, 10vw, 136px) clamp(28px, 4vw, 72px);
  border-top: 1px solid rgba(47, 41, 34, 0.16);
  border-bottom: 1px solid rgba(47, 41, 34, 0.16);
}

.statement-band p {
  margin: 0;
  font-size: clamp(2.6rem, 5.7vw, 7rem);
  line-height: 0.96;
  letter-spacing: -0.06em;
}

.statement-band p + p {
  margin-top: 0.12em;
  color: var(--color-muted);
}

.mapcorum-chapter {
  display: block;
  max-width: 1050px;
}

.feature-list {
  display: grid;
  gap: 34px;
}

.feature-list article {
  padding-top: 30px;
  border-top: 1px solid rgba(47, 41, 34, 0.16);
}

.feature-list h3 {
  margin: 0 0 12px;
  font-size: clamp(1.4rem, 1.8vw, 2rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 400;
}

.feature-list p,
.trust-section p,
.final-cta p {
  margin: 0;
  font-size: clamp(1.08rem, 1.28vw, 1.32rem);
  line-height: 1.58;
  color: var(--color-muted);
}

.trust-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(320px, 1fr);
  gap: clamp(42px, 7vw, 112px);
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(78px, 9vw, 136px) clamp(28px, 4vw, 72px);
  border-top: 1px solid rgba(47, 41, 34, 0.16);
}

.final-cta {
  max-width: 980px;
  margin: 0 auto;
  padding: clamp(96px, 12vw, 184px) clamp(28px, 4vw, 72px) clamp(80px, 10vw, 148px);
  text-align: center;
}

.final-cta p {
  margin-bottom: 18px;
}

.cta-link {
  display: inline-block;
  margin-top: 38px;
  padding: 15px 24px 16px;
  border: 1px solid rgba(47, 41, 34, 0.28);
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.24);
}

.cta-link:hover {
  border-color: rgba(47, 41, 34, 0.54);
}

@media (max-width: 1100px) {
  .opening-copy {
    width: min(48vw, 560px);
  }

  .opening-image {
    top: clamp(128px, 17vh, 190px);
    left: clamp(420px, 42vw, 520px);
    width: clamp(760px, 72vw, 1080px);
  }
}

@media (max-width: 820px) {
  .site-header {
    position: absolute;
  }

  .site-nav {
    display: none;
  }

  .opening-spread {
    min-height: auto;
    overflow: visible;
    padding: 86px 22px 52px;
  }

  .opening-copy {
    width: 100%;
  }

  .brand-mark {
    display: none;
  }

  .opening-headline {
    font-size: clamp(4rem, 17vw, 7.4rem);
  }

  .opening-line {
    margin-top: 30px;
  }

  .opening-image {
    position: relative;
    top: auto;
    left: auto;
    width: 1456px;
    max-width: none;
    margin-top: 42px;
  }

  .opening-image img {
    -webkit-mask-image:
      linear-gradient(to bottom, black 0%, black 94%, transparent 100%);
    mask-image:
      linear-gradient(to bottom, black 0%, black 94%, transparent 100%);
  }

  .chapter,
  .trust-section {
    display: block;
    padding-left: 22px;
    padding-right: 22px;
  }

  .chapter-body,
  .feature-list,
  .trust-section p {
    margin-top: 30px;
  }

  .statement-band {
    padding-left: 22px;
    padding-right: 22px;
  }

  .final-cta {
    padding-left: 22px;
    padding-right: 22px;
    text-align: left;
  }
}