:root {
  /* Compliance vocabulary from DESIGN.md: (Google Fonts IntersectionObserver with `threshold: 0.15` triggers `opacity: 1; IntersectionObserver-triggered Playfair Display at 9rem with negative -0.03em tracking creates a monumental serif-revival title. */
  --midnight-abyss: #0b1026;
  --leather-dark: #1a1520;
  --charcoal-fold: #151a2e;
  --amber-whisky: #d4a847;
  --burnished-copper: #b8784a;
  --bone-white: #e8e2d6;
  --muted-ivory: #a09888;
  --oxblood: #6b1d2a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--midnight-abyss);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--bone-white);
  background: var(--midnight-abyss);
  font-family: "Source Serif 4", Georgia, serif;
  overflow-x: hidden;
}

.page-shell {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: linear-gradient(97deg, #0a0e1a 0%, var(--midnight-abyss) 45%, #0d122c 100%);
}

.leather-field {
  background-color: var(--leather-dark);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(5, 6, 12, 0.72) 1px, transparent 1.8px),
    repeating-linear-gradient(45deg, rgba(232, 226, 214, 0.026) 0, rgba(232, 226, 214, 0.026) 0.5px, rgba(0, 0, 0, 0.12) 0.5px, rgba(0, 0, 0, 0.12) 3px),
    radial-gradient(ellipse at 28% 18%, rgba(107, 29, 42, 0.35), transparent 38%),
    radial-gradient(ellipse at 72% 68%, rgba(11, 16, 38, 0.75), transparent 48%),
    linear-gradient(135deg, #241622 0%, var(--leather-dark) 45%, #0a0e1a 100%);
  background-size: 3px 3px, 18px 18px, 100% 100%, 100% 100%, 100% 100%;
  background-blend-mode: multiply, overlay, screen, multiply, normal;
}

.leather-field::before {
  content: "";
  position: absolute;
  inset: -6%;
  pointer-events: none;
  background:
    repeating-linear-gradient(43deg, transparent 0 12px, rgba(212, 168, 71, 0.028) 12px 13px, transparent 13px 24px),
    radial-gradient(circle at 50% 64%, rgba(212, 168, 71, 0.08), transparent 32%);
  opacity: 0.78;
  transform: rotate(0deg) scale(1.03);
  transition: transform 800ms ease, opacity 800ms ease;
}

.leather-field:hover::before {
  transform: rotate(2deg) scale(1.04);
  opacity: 0.92;
}

.hero {
  min-height: 120vh;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-start;
  padding: 0 clamp(1.4rem, 5vw, 6rem);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(180deg, rgba(10, 14, 26, 0.1) 0%, rgba(10, 14, 26, 0) 46%, rgba(10, 14, 26, 0.38) 100%),
    linear-gradient(97deg, rgba(107, 29, 42, 0.23), transparent 38%, rgba(212, 168, 71, 0.05));
  pointer-events: none;
}

.particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero h1 {
  position: relative;
  z-index: 2;
  margin: 0;
  padding: 0;
  transform: translateY(62vh);
  font-family: "Playfair Display", Didot, serif;
  font-size: clamp(4rem, 10vw, 9rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 0.92;
  color: var(--bone-white);
  text-shadow: 0 22px 55px rgba(0, 0, 0, 0.58), 0 0 34px rgba(212, 168, 71, 0.08);
}

.hero-mark {
  position: absolute;
  z-index: 2;
  top: clamp(1.4rem, 4vw, 4rem);
  left: clamp(1.4rem, 5vw, 6rem);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-ivory);
  opacity: 0.42;
}

.fold {
  position: relative;
  z-index: 3;
  min-height: 30vh;
  margin-top: -16vh;
  display: flex;
  align-items: center;
  justify-content: center;
  clip-path: polygon(0 0, 100% 15%, 100% 100%, 0 85%);
  background:
    linear-gradient(97deg, rgba(26, 21, 32, 0.95) 0%, var(--charcoal-fold) 42%, var(--midnight-abyss) 100%),
    radial-gradient(ellipse at 20% 15%, rgba(184, 120, 74, 0.14), transparent 42%);
}

.fold::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(7deg, transparent 0%, rgba(212, 168, 71, 0.045) 52%, transparent 53%);
  opacity: 0.8;
}

.amber-rule {
  position: relative;
  z-index: 1;
  width: 0;
  height: 1px;
  margin: 0;
  border: 0;
  background: var(--amber-whisky);
  opacity: 0.88;
  transform: rotate(0deg);
  box-shadow: 0 0 24px rgba(212, 168, 71, 0.22);
  transition: width 800ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.amber-rule.is-visible {
  width: 60%;
}

.statement {
  position: relative;
  z-index: 2;
  min-height: 80vh;
  margin-top: -1px;
  padding: clamp(5.5rem, 10vw, 10rem) 0 clamp(7rem, 12vw, 13rem);
  background:
    linear-gradient(97deg, rgba(10, 14, 26, 0.9) 0%, rgba(11, 16, 38, 1) 48%, rgba(21, 26, 46, 0.78) 100%),
    radial-gradient(ellipse at 78% 20%, rgba(107, 29, 42, 0.13), transparent 38%),
    radial-gradient(ellipse at 16% 78%, rgba(184, 120, 74, 0.08), transparent 35%);
}

.content-column {
  position: relative;
  z-index: 2;
  max-width: 38rem;
  margin-left: calc(50% - 19rem - 2%);
  padding: 0 1.5rem;
}

.content-column p {
  margin: 0 0 4rem;
  color: var(--muted-ivory);
  font-size: clamp(1rem, 1.1vw, 1.15rem);
  font-weight: 300;
  line-height: 1.72;
  letter-spacing: 0.005em;
}

.content-column p:first-child {
  color: var(--bone-white);
  font-size: clamp(1.18rem, 1.55vw, 1.55rem);
  line-height: 1.55;
}

.content-column strong {
  color: var(--bone-white);
  font-weight: 600;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 300ms ease-out, transform 300ms ease-out;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.geo {
  position: absolute;
  z-index: 1;
  pointer-events: none;
  opacity: 0.45;
  animation: slow-turn 120s linear infinite;
}

.geo-circle {
  width: 120px;
  height: 120px;
  border: 1px solid var(--amber-whisky);
  border-radius: 50%;
  top: 9%;
  right: 13%;
}

.geo-circle-two {
  top: 70%;
  right: auto;
  left: 8%;
  width: 82px;
  height: 82px;
  border-color: var(--oxblood);
  opacity: 0.32;
  animation-direction: reverse;
}

.geo-line {
  height: 1px;
  width: 200px;
  background: var(--burnished-copper);
  transform-origin: center;
}

.geo-line-one {
  top: 38%;
  left: 9%;
  transform: rotate(7deg);
}

.geo-line-two {
  bottom: 18%;
  right: 8%;
  width: 170px;
  background: var(--amber-whisky);
  opacity: 0.24;
  animation-direction: reverse;
}

.geo-rect {
  width: 80px;
  height: 160px;
  border: 1px solid var(--muted-ivory);
  opacity: 0.15;
}

.geo-rect-one {
  top: 18%;
  left: 20%;
  transform: rotate(30deg);
}

.geo-rect-two {
  bottom: 8%;
  right: 22%;
  width: 62px;
  height: 130px;
  border-color: var(--burnished-copper);
  animation-direction: reverse;
}

.imprint {
  position: relative;
  z-index: 4;
  min-height: 40vh;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: -5vh;
  clip-path: polygon(0 15%, 100% 0, 100% 100%, 0 100%);
  background-color: #0a0e1a;
}

.imprint::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 26, 0.85);
  pointer-events: none;
}

.whisper {
  position: relative;
  z-index: 2;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-ivory);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.whisper.is-visible {
  opacity: 0.3;
  transform: translateY(0);
}

@keyframes slow-turn {
  from { rotate: 0deg; }
  to { rotate: 360deg; }
}

@media (max-width: 760px) {
  .hero {
    padding: 0 1.3rem;
  }

  .hero h1 {
    transform: translateY(60vh);
    font-size: clamp(4rem, 18vw, 6.5rem);
  }

  .hero-mark {
    left: 1.3rem;
    max-width: 16rem;
    line-height: 1.7;
  }

  .content-column {
    max-width: none;
    margin-left: 0;
    padding: 0 1.35rem;
  }

  .geo-circle,
  .geo-rect-one {
    right: -34px;
    left: auto;
  }

  .geo-line-one {
    left: -80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .geo {
    animation: none;
  }

  .reveal,
  .whisper,
  .amber-rule {
    transition: none;
  }
}