/* ============================================================
   DER HEILIGE BAUM DER ZIVILISATION — Design Tokens
   Organic / editorial palette shared with the coaching PDF.
   ============================================================ */

:root,
[data-theme='light'] {
  /* Surfaces — warm parchment */
  --color-bg: #faf7ef;
  --color-surface: #f2eddd;
  --color-surface-2: #ece5d2;
  --color-surface-offset: #f6f2e6;
  --color-border: #d8cfb5;
  --color-divider: #e2dac2;

  /* Text — warm ink */
  --color-text: #2a2620;
  --color-text-muted: #746b5c;
  --color-text-faint: #a79e8b;
  --color-text-inverse: #faf7ef;

  /* Primary accent — forest green (Teil I / persönlich) */
  --color-primary: #2f5233;
  --color-primary-hover: #1e3a22;
  --color-primary-highlight: #dbe5d5;

  /* Secondary accent — terracotta (Teil II / gesellschaftlich) */
  --color-secondary: #ab5f1d;
  --color-secondary-hover: #7c4515;
  --color-secondary-highlight: #ecd9c2;

  --color-gold: #c99a3d;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 3px oklch(0.25 0.03 90 / 0.08);
  --shadow-md: 0 8px 24px oklch(0.25 0.03 90 / 0.1);
  --shadow-lg: 0 20px 48px oklch(0.25 0.03 90 / 0.14);

  --content-narrow: 640px;
  --content-default: 780px;
  --content-wide: 1180px;

  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'General Sans', 'Work Sans', sans-serif;
}

[data-theme='dark'] {
  --color-bg: #17150f;
  --color-surface: #1d1a13;
  --color-surface-2: #241f16;
  --color-surface-offset: #221e15;
  --color-border: #39331f;
  --color-divider: #2c271a;

  --color-text: #e9e4d5;
  --color-text-muted: #a89f8a;
  --color-text-faint: #756c58;
  --color-text-inverse: #201c14;

  --color-primary: #85ab88;
  --color-primary-hover: #a3c6a6;
  --color-primary-highlight: #2a3a2c;

  --color-secondary: #d79a5c;
  --color-secondary-hover: #e6b47f;
  --color-secondary-highlight: #3f2f1f;

  --color-gold: #e0b85c;

  --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.3);
  --shadow-md: 0 8px 24px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 20px 48px oklch(0 0 0 / 0.45);
}

/* ---------- Type scale ---------- */
:root {
  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.83rem + 0.25vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.03rem + 0.5vw, 1.375rem);
  --text-xl: clamp(1.4rem, 1.2rem + 1vw, 1.9rem);
  --text-2xl: clamp(1.9rem, 1.4rem + 2.2vw, 2.9rem);
  --text-hero: clamp(2.4rem, 1.4rem + 4.5vw, 4.6rem);
}

/* ---------- Spacing (4px base) ---------- */
:root {
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

/* ============================================================
   LAYOUT PRIMITIVES
   ============================================================ */

.wrap {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-10));
}

.wrap--narrow {
  max-width: var(--content-default);
}

.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}

.section--tight {
  padding-block: clamp(var(--space-10), 6vw, var(--space-20));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 600;
}

.eyebrow--secondary {
  color: var(--color-secondary);
}

.eyebrow::before {
  content: '';
  width: 18px;
  height: 1px;
  background: currentColor;
  display: inline-block;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.section-title {
  font-size: var(--text-2xl);
  margin-top: var(--space-4);
  max-width: 18ch;
}

.section-title--wide {
  max-width: 26ch;
}

.section-kicker {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  max-width: 60ch;
  margin-top: var(--space-5);
  font-family: var(--font-body);
}

/* ============================================================
   HEADER
   ============================================================ */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
  transition:
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.header--hidden {
  transform: translateY(-100%);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
  gap: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  text-decoration: none;
}

.brand svg {
  color: var(--color-primary);
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: 1.1;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-primary);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  background: var(--color-surface);
}

.icon-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--lg {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-base);
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  position: relative;
  padding-block: clamp(var(--space-16), 10vw, var(--space-24)) 0;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(var(--space-10), 6vw, var(--space-16));
  align-items: center;
}

.hero-copy .eyebrow {
  margin-bottom: var(--space-5);
}

.hero h1 {
  font-size: var(--text-hero);
  line-height: 1.04;
}

.hero-lead {
  margin-top: var(--space-6);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.hero-note {
  margin-top: var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.02em;
}

.hero-media {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 3 / 4;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, oklch(0.15 0.02 90 / 0.35));
}

.hero-divider {
  margin-top: clamp(var(--space-16), 8vw, var(--space-24));
  border: none;
  border-top: 1px solid var(--color-divider);
}

/* ============================================================
   INTRO / IDEE
   ============================================================ */

.idee-grid {
  margin-top: clamp(var(--space-10), 6vw, var(--space-16));
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.idee-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.idee-card h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
}

.idee-card .idee-mark {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  margin-bottom: var(--space-5);
}

.idee-card--yes .idee-mark {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}

.idee-card--no .idee-mark {
  background: var(--color-secondary-highlight);
  color: var(--color-secondary);
}

.idee-card--who .idee-mark {
  background: var(--color-surface-2);
  color: var(--color-text-muted);
}

.idee-card p {
  margin-top: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ============================================================
   TWO-PART SECTIONS (Für dich / Für morgen)
   ============================================================ */

.part {
  border-top: 1px solid var(--color-divider);
}

.part-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: center;
}

.part--reverse .part-grid {
  grid-template-columns: 1fr 1fr;
}

.part--reverse .part-media {
  order: 2;
}

.part-media {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.part-media img {
  width: 100%;
  display: block;
}

.part-list {
  margin-top: var(--space-8);
  display: grid;
  gap: var(--space-4);
}

.part-list li {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  font-size: var(--text-base);
}

.part-list .bullet {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  margin-top: 0.55em;
}

.part--personal .bullet {
  background: var(--color-primary);
}

.part--society .bullet {
  background: var(--color-secondary);
}

.part-quote {
  margin-top: var(--space-8);
  padding-left: var(--space-6);
  border-left: 3px solid var(--color-border);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  font-style: italic;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.tag {
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.callout-panel {
  margin-top: var(--space-10);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-8);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.callout-panel strong {
  color: var(--color-text);
}

/* ============================================================
   SEED / MULTIPLIER SECTION
   ============================================================ */

.seed {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.seed-grid {
  margin-top: clamp(var(--space-10), 6vw, var(--space-16));
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.seed-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.seed-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
}

.seed-card h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-base);
}

.seed-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ============================================================
   DOWNLOAD
   ============================================================ */

.download {
  border-top: 1px solid var(--color-divider);
}

.download-card {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-10), 6vw, var(--space-16));
  color: var(--color-text-inverse);
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: var(--space-10);
  align-items: center;
  box-shadow: var(--shadow-lg);
}

.download-card h2 {
  font-size: var(--text-2xl);
  max-width: 16ch;
}

.download-card p {
  margin-top: var(--space-4);
  opacity: 0.85;
  max-width: 46ch;
}

.download-facts {
  margin-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  font-size: var(--text-xs);
  opacity: 0.75;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.download-action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}

.download-card .btn--primary {
  background: var(--color-text-inverse);
  color: var(--color-primary-hover);
}

.download-card .btn--primary:hover {
  background: color-mix(in oklab, var(--color-text-inverse) 88%, var(--color-primary));
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
  padding-block: var(--space-16) var(--space-10);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-10);
  flex-wrap: wrap;
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-divider);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
}

.footer-brand svg {
  width: 26px;
  height: 26px;
  color: var(--color-primary);
}

.footer-note {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  max-width: 46ch;
}

.footer-links {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}

.footer-col a {
  display: block;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  margin-bottom: var(--space-2);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  margin-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 900px) {
  .hero-grid,
  .part-grid,
  .download-card {
    grid-template-columns: 1fr;
  }

  .part--reverse .part-media {
    order: 0;
  }

  .hero-media {
    aspect-ratio: 16 / 10;
  }

  .idee-grid,
  .seed-grid {
    grid-template-columns: 1fr;
  }

  .download-action {
    align-items: flex-start;
  }
}

.mobile-menu {
  border-top: 1px solid var(--color-divider);
  background: var(--color-bg);
}

.mobile-menu ul {
  display: flex;
  flex-direction: column;
  padding-block: var(--space-4);
}

.mobile-menu a {
  display: block;
  padding: var(--space-3) 0;
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--text-base);
  border-bottom: 1px solid var(--color-divider);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

@media (max-width: 720px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .brand-name {
    font-size: var(--text-base);
  }
}

@media (min-width: 721px) {
  .mobile-menu {
    display: none !important;
  }
}