:root {
  --bg: #ffffff;
  --surface: #fffdfa;
  --ink: #171314;
  --muted: #5d5754;
  --line: #e8dfd8;
  --rust: #b34029;
  --rust-deep: #8d2c1a;
  --leaf: #7ea047;
  --leaf-deep: #506d28;
  --shadow: 0 18px 48px rgba(46, 26, 18, 0.08);
  --radius: 28px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(126, 160, 71, 0.14), transparent 28%),
    radial-gradient(circle at top right, rgba(179, 64, 41, 0.1), transparent 30%),
    var(--bg);
  color: var(--ink);
  font-family: "Avenir Next", "Trebuchet MS", "Segoe UI", sans-serif;
}

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

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

.page-shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
  position: sticky;
  top: 1rem;
  z-index: 10;
  backdrop-filter: blur(14px);
}

.brand-mark {
  font-family: "Avenir Next Condensed", "Arial Narrow", sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 700;
  transition: background 180ms ease, color 180ms ease;
}

.nav-link:hover,
.nav-link-current {
  background: rgba(179, 64, 41, 0.1);
  color: var(--rust-deep);
}

.nav-dropdown {
  position: relative;
  display: inline-block;
}

.nav-dropdown summary {
  list-style: none;
  cursor: pointer;
}

.nav-dropdown summary::-webkit-details-marker {
  display: none;
}

.nav-dropdown summary::after {
  content: "▾";
  margin-left: 0.45rem;
  font-size: 0.8em;
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 0.55rem);
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  width: max-content;
  max-width: min(280px, calc(100vw - 3rem));
  padding: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow);
  display: grid;
  gap: 0.25rem;
  z-index: 25;
}

.nav-dropdown-link {
  display: block;
  padding: 0.8rem 0.95rem;
  border-radius: 14px;
  color: var(--muted);
  font-weight: 700;
  transition: background 180ms ease, color 180ms ease;
}

.nav-dropdown-link:hover,
.nav-dropdown-link-current {
  background: rgba(179, 64, 41, 0.1);
  color: var(--rust-deep);
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
  min-height: 92vh;
}

.eyebrow,
.section-kicker,
.timeline-label {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  color: var(--rust);
  font-weight: 700;
}

h1,
h2,
h3 {
  font-family: "Avenir Next Condensed", "Arial Narrow", "Avenir Next", sans-serif;
  line-height: 0.95;
  margin: 0;
}

h1 {
  font-size: clamp(3.5rem, 8vw, 6.7rem);
  max-width: 9ch;
  margin-top: 0.75rem;
}

h2 {
  font-size: clamp(2.2rem, 4vw, 3.3rem);
  max-width: 12ch;
}

.section-heading h2 {
  max-width: none;
}

h3 {
  font-size: 1.55rem;
}

.subtitle,
.lede,
.card p,
.timeline-card p,
.author-panel p,
.buy-card,
.extract-card p {
  font-size: 1.08rem;
  line-height: 1.7;
  color: var(--muted);
}

.subtitle {
  font-size: 1.4rem;
  max-width: 28rem;
  margin: 1.5rem 0 1rem;
  color: var(--rust-deep);
}

.lede {
  max-width: 40rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.4rem;
  padding: 0 1.4rem;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover,
.buy-card:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--rust);
  color: #fff;
  box-shadow: var(--shadow);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
}

.hero-art {
  position: relative;
}

.cover-frame {
  position: relative;
  padding: 1.1rem;
  border: 1px solid rgba(232, 223, 216, 0.95);
  border-radius: calc(var(--radius) + 10px);
  background: linear-gradient(180deg, #fff, #fbf7f2);
  box-shadow: var(--shadow);
}

.cover-frame::after {
  content: "";
  position: absolute;
  inset: auto -1rem -1rem auto;
  width: 8rem;
  height: 8rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(126, 160, 71, 0.22), transparent 65%);
  pointer-events: none;
}

.cover-frame img {
  width: 100%;
  border-radius: calc(var(--radius) - 8px);
}

.hero-secondary {
  min-height: auto;
  padding-bottom: 0.5rem;
}

.concept-frame {
  display: grid;
  place-items: center;
  min-height: 28rem;
}

.concept-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.95rem;
}

.concept-chip {
  min-width: 13rem;
  padding: 1rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  text-align: center;
  font-family: "Avenir Next Condensed", "Arial Narrow", sans-serif;
  font-size: 1.5rem;
  box-shadow: var(--shadow);
}

.concept-plus {
  color: var(--rust);
  font-size: 2rem;
  font-weight: 700;
}

.section {
  padding: 3rem 0;
}

.section-heading {
  margin-bottom: 1.6rem;
}

.info-grid,
.extract-grid,
.buy-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.buy-grid-two {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card,
.extract-card,
.buy-card,
.author-panel,
.timeline-card,
.toc-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.card,
.extract-card,
.timeline-card,
.toc-card {
  padding: 1.6rem;
}

.toc-card {
  display: grid;
  gap: 0.8rem;
  background:
    linear-gradient(180deg, rgba(126, 160, 71, 0.08), rgba(179, 64, 41, 0.04)),
    var(--surface);
}

.toc-card p {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.6;
  color: var(--ink);
}

.video-heading {
  margin-top: 2rem;
}

.video-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.video-frame iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
}

.card h3,
.timeline-card h3 {
  margin-bottom: 0.75rem;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.timeline-card {
  position: relative;
  overflow: hidden;
}

.timeline-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 8px;
  background: linear-gradient(180deg, var(--rust), var(--leaf));
}

.timeline-card > * {
  position: relative;
  left: 0.5rem;
}

.extract-card {
  background:
    linear-gradient(180deg, rgba(126, 160, 71, 0.12), transparent 40%),
    var(--surface);
}

.extract-card p {
  color: var(--ink);
  font-size: 1.24rem;
  margin: 0 0 1rem;
}

.extract-card cite {
  font-style: normal;
  color: var(--rust);
  font-weight: 700;
}

.author-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2rem;
  padding: 2rem;
  background:
    linear-gradient(120deg, rgba(179, 64, 41, 0.08), rgba(126, 160, 71, 0.08)),
    #fff;
}

.intro .author-panel,
.highlights .author-panel,
.extracts .author-panel,
.buy .author-panel,
.resources .author-panel,
.toc-section .author-panel,
.activities .author-panel {
  grid-template-columns: 1fr;
}

.author-photo-frame {
  padding: 0.8rem;
  align-self: start;
}

.author-photo {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 60% center;
  border-radius: calc(var(--radius) - 8px);
}

.author-title {
  font-size: clamp(2.7rem, 5vw, 4.2rem);
  max-width: none;
}

.author-links {
  margin-top: 1.25rem;
}

.buy-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.5rem;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.store-name {
  font-family: "Avenir Next Condensed", "Arial Narrow", sans-serif;
  font-size: 1.85rem;
  color: var(--ink);
}

.store-copy {
  color: var(--muted);
}

.buy-card:first-child {
  border-color: rgba(179, 64, 41, 0.35);
}

.buy-card:last-child {
  border-color: rgba(126, 160, 71, 0.5);
}

@media (max-width: 920px) {
  .site-nav,
  .hero,
  .author-panel,
  .timeline,
  .info-grid,
  .extract-grid,
  .buy-grid {
    grid-template-columns: 1fr;
  }

  .site-nav {
    display: grid;
    justify-content: stretch;
    border-radius: 28px;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .nav-dropdown-menu {
    left: 50%;
    transform: translateX(-50%);
    max-width: min(260px, calc(100vw - 2rem));
  }

  .hero,
  .author-panel,
  .timeline,
  .info-grid,
  .extract-grid,
  .buy-grid,
  .buy-grid-two {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 1rem;
  }

  h1 {
    max-width: 11ch;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 1.25rem, 1120px);
    padding-top: 1rem;
  }

  h1 {
    font-size: clamp(3rem, 16vw, 4.6rem);
  }

  h2 {
    max-width: none;
  }

  .button {
    width: 100%;
  }
}
.section.author {
  padding-top: 1.25rem;
}