:root {
  --black: #080808;
  --charcoal: #111111;
  --ash: #6b6b6f;
  --bone: #ede7dc;
  --bone-soft: #d4cfc4;
  --gold: #c9a84c;
  --border: rgba(107, 107, 111, 0.2);

  --font-body: Inter, system-ui, sans-serif;
  --font-display: Georgia, serif;

  --hero-title: clamp(3rem, 6vw, 5.25rem);
  --section-heading: clamp(2rem, 4vw, 2.75rem);
  --subject-heading: clamp(2.5rem, 5vw, 3.25rem);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--black);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.72;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 76px;
  padding: 0 clamp(24px, 5vw, 72px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(8, 8, 8, 0.82);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
  z-index: 20;
}

.brand {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--bone);
}

.site-nav {
  display: flex;
  gap: clamp(0.9rem, 1.6vw, 1.4rem);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bone-soft);
}

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

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--bone);
  font-size: 1.4rem;
  padding: 0.35rem 0.65rem;
}

.hero {
  min-height: 88vh;
  padding: 20vh 7vw 10vh;
  max-width: 1080px;
}

.eyebrow {
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.78rem;
  margin-bottom: 2rem;
}

.eyebrow::after {
  content: "";
  display: block;
  width: 80px;
  height: 1px;
  background: var(--gold);
  margin-top: 1rem;
}

h1 {
  font-family: var(--font-display);
  font-size: var(--hero-title);
  font-weight: 400;
  line-height: 1.03;
  letter-spacing: 0;
  max-width: 900px;
  margin: 0 0 1.8rem;
  text-wrap: balance;
}

.hero-subline {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.2vw, 1.85rem);
  line-height: 1.42;
  color: var(--bone);
  max-width: 760px;
  margin-bottom: 1.25rem;
}

.hero-copy {
  color: var(--bone-soft);
  max-width: 720px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.2rem;
  border: 1px solid var(--border);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.button.primary {
  background: var(--gold);
  color: var(--black);
  border-color: var(--gold);
}

.button.secondary {
  color: var(--bone);
}

.book-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: clamp(40px, 7vw, 88px);
  align-items: center;
  max-width: 1180px;
}

.book-hero-copy {
  min-width: 0;
}

.book-author {
  margin: -0.25rem 0 1.5rem;
  color: var(--gold);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.book-cover {
  aspect-ratio: 0.68;
  width: 100%;
  max-width: 360px;
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    linear-gradient(145deg, rgba(201, 168, 76, 0.16), transparent 38%),
    linear-gradient(180deg, #151515, #080808);
  border: 1px solid rgba(201, 168, 76, 0.38);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.42);
}

.book-cover-kicker,
.book-cover-author {
  margin: 0;
  color: var(--gold);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.book-cover-title {
  margin: auto 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.35rem);
  line-height: 1;
  color: var(--bone);
  text-wrap: balance;
}

.book-cover-subtitle {
  margin: 0 0 auto;
  color: var(--bone-soft);
  font-size: 0.95rem;
  line-height: 1.5;
}

.book-list {
  max-width: 760px;
  margin: 0;
  padding-left: 1.2rem;
  color: var(--bone-soft);
}

.book-list li {
  margin-bottom: 0.75rem;
}

.book-cta {
  padding-bottom: 12px;
}

.content-section {
  max-width: 920px;
  padding: 78px 7vw 0;
}

.content-section .eyebrow {
  margin-bottom: 22px;
}

.content-section h2 {
  max-width: 760px;
  margin-bottom: 24px;
}

.content-section .hero-copy {
  max-width: 760px;
  margin-bottom: 20px;
}

.site-footer {
  margin-top: 96px;
  padding: 44px 7vw 48px;
  border-top: 1px solid var(--border);
  color: var(--bone-soft);
}

.footer-inner {
  max-width: 1080px;
}

.footer-brand {
  margin: 0 0 0.55rem;
  color: var(--bone);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.footer-line {
  max-width: 540px;
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.1rem;
  margin-bottom: 1.3rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-nav a:hover {
  color: var(--gold);
}

.footer-copy {
  margin: 0;
  color: var(--ash);
  font-size: 0.78rem;
}

@media (max-width: 900px) {
  .site-header {
    height: 72px;
  }

  .brand {
    letter-spacing: 0.14em;
  }

  .site-nav {
    gap: 0.72rem;
    font-size: 0.66rem;
  }

  .hero {
    min-height: 82vh;
    padding-top: 18vh;
  }

  .book-hero {
    grid-template-columns: 1fr;
  }

  .book-cover {
    max-width: 320px;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 72px;
    right: 0;
    width: 100%;
    padding: 2rem 8vw;
    display: none;
    flex-direction: column;
    background: var(--charcoal);
    border-bottom: 1px solid var(--border);
  }

  .site-nav.open {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 17vh 7vw 72px;
  }

  .content-section {
    padding-top: 58px;
  }

  .button {
    min-height: 46px;
    width: 100%;
  }

  .site-footer {
    margin-top: 72px;
    padding-top: 36px;
  }
}

@media (max-width: 480px) {
  :root {
    --hero-title: clamp(2.55rem, 12vw, 3.35rem);
  }

  body {
    font-size: 16px;
  }

  .hero {
    padding-top: 15vh;
  }

  .eyebrow {
    letter-spacing: 0.18em;
    margin-bottom: 1.5rem;
  }

  .footer-nav {
    flex-direction: column;
  }
}