:root {
  --bg: #f5efe4;
  --surface: rgba(255, 250, 242, 0.82);
  --surface-strong: #fffaf0;
  --text: #1e1b16;
  --muted: #5f564b;
  --line: rgba(30, 27, 22, 0.12);
  --accent: #eb5b2a;
  --accent-strong: #c94418;
  --accent-soft: rgba(235, 91, 42, 0.12);
  --secondary: #0d5c4f;
  --shadow: 0 20px 60px rgba(44, 29, 12, 0.14);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(13, 92, 79, 0.18), transparent 24%),
    radial-gradient(circle at 85% 15%, rgba(235, 91, 42, 0.16), transparent 22%),
    linear-gradient(180deg, #f8f2e8 0%, #f3ebde 48%, #efe4d3 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(30, 27, 22, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(30, 27, 22, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 85%);
}

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

.page-shell {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 16px auto;
}

.hero,
.section,
.footer {
  position: relative;
  z-index: 1;
}

.hero {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius-xl) + 8px);
  background: linear-gradient(135deg, rgba(255, 251, 245, 0.9), rgba(246, 238, 224, 0.82));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -80px -100px auto;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(13, 92, 79, 0.18), transparent 70%);
  z-index: -1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  box-shadow: 0 0 0 8px rgba(235, 91, 42, 0.08);
}

.brand-text {
  font-size: 0.95rem;
  text-transform: uppercase;
}

.nav-cta {
  color: var(--secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 700;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 32px;
  align-items: center;
  padding-top: 48px;
}

.eyebrow,
.section-tag,
.book-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.02;
}

h1,
h2 {
  font-family: "Source Serif 4", serif;
}

h1 {
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  max-width: 11ch;
}

.subheadline {
  margin: 24px 0 0;
  max-width: 60ch;
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--muted);
}

.hero-actions {
  margin-top: 30px;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  padding: 16px 26px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #ff8a3c);
  color: #fffdf9;
  text-decoration: none;
  font-size: 0.96rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.03em;
  box-shadow: 0 18px 32px rgba(201, 68, 24, 0.24);
  transition: transform 180ms ease, box-shadow 180ms ease, filter 180ms ease;
}

.primary-button:hover,
.primary-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 22px 40px rgba(201, 68, 24, 0.28);
  filter: saturate(1.08);
}

.microcopy,
.cta-note,
.footer p {
  color: var(--muted);
}

.microcopy {
  margin: 12px 0 0;
  font-size: 0.94rem;
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 251, 245, 0.72);
  line-height: 1.55;
}

.hero-card {
  display: flex;
  justify-content: center;
}

.book-card {
  width: min(100%, 410px);
  padding: 28px;
  border-radius: 28px;
  background: linear-gradient(155deg, #143f38 0%, #0c5c4f 58%, #16322d 100%);
  color: #f8f3eb;
  box-shadow: 0 28px 50px rgba(13, 52, 45, 0.24);
  transform: rotate(2deg);
}

.book-card h2 {
  margin-top: 12px;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
}

.book-card p {
  margin: 18px 0 0;
  line-height: 1.7;
  color: rgba(248, 243, 235, 0.84);
}

.book-details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.detail-label {
  display: block;
  margin-bottom: 6px;
  color: rgba(248, 243, 235, 0.6);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.book-footer {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(248, 243, 235, 0.18);
  font-weight: 700;
}

.section {
  margin-top: 22px;
  padding: 42px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.section-heading {
  max-width: 740px;
}

.section h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

.problem-grid,
.ethics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.problem-grid p,
.ethics-grid p,
.checklist-panel > p,
.cta-panel > p {
  margin: 0;
  font-size: 1.03rem;
  line-height: 1.8;
  color: var(--muted);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
}

.pillar-card,
.timeline-item {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface-strong);
}

.pillar-number {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--accent-strong);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.pillar-card h3 {
  font-size: 1.4rem;
}

.pillar-card p {
  margin: 12px 0 0;
  line-height: 1.7;
  color: var(--muted);
}

.checklist-panel,
.cta-panel {
  display: grid;
  gap: 24px;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.timeline-item {
  display: grid;
  gap: 10px;
}

.timeline-item strong {
  font-size: 1.05rem;
}

.timeline-item span {
  color: var(--muted);
  line-height: 1.6;
}

.cta-section {
  background: linear-gradient(135deg, rgba(13, 92, 79, 0.1), rgba(235, 91, 42, 0.1));
}

.cta-panel .primary-button {
  width: fit-content;
}

.footer {
  padding: 24px 10px 40px;
  text-align: center;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal-delay {
  transition-delay: 120ms;
}

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

@media (max-width: 980px) {
  .hero-grid,
  .problem-grid,
  .ethics-grid,
  .pillars-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

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

  .book-card {
    transform: none;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(calc(100% - 18px), var(--max-width));
    margin: 9px auto;
  }

  .hero,
  .section {
    padding: 22px 18px;
    border-radius: 24px;
  }

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

  h1 {
    max-width: 100%;
  }

  .subheadline {
    font-size: 1.02rem;
  }

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

  .primary-button,
  .cta-panel .primary-button {
    width: 100%;
  }
}

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

  .reveal,
  .reveal-delay,
  .primary-button {
    transition: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}