/**
 * ARCHE — layout (en-tête, pied, contenu)
 */

.site-header {
  background: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header__inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: calc(var(--space-unit) * 2) calc(var(--space-unit) * 3);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: calc(var(--space-unit) * 2);
  justify-content: space-between;
}

.site-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
}

.site-logo:hover {
  color: var(--color-brand);
}

.site-logo__tagline {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0;
}

[data-theme="high-contrast"] .site-logo__tagline {
  color: var(--color-text);
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space-unit) * 2);
}

.site-nav a {
  text-decoration: none;
  font-weight: 500;
  padding: calc(var(--space-unit) * 1) calc(var(--space-unit) * 1.5);
  border-radius: var(--radius-sm);
}

.site-nav a[aria-current="page"] {
  background: var(--color-surface-alt);
  color: var(--color-text);
  font-weight: 700;
}

.site-main {
  max-width: 72rem;
  margin: 0 auto;
  padding: calc(var(--space-unit) * 4) calc(var(--space-unit) * 3);
  flex: 1;
}

.site-footer {
  background: var(--color-surface);
  border-top: 2px solid var(--color-border);
  margin-top: auto;
}

.site-footer__inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: calc(var(--space-unit) * 3);
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space-unit) * 2);
  justify-content: space-between;
  align-items: center;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

[data-theme="high-contrast"] .site-footer__inner {
  color: var(--color-text);
}

.page-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Hero accueil */
.hero {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: calc(var(--space-unit) * 4);
  box-shadow: var(--shadow-md);
  margin-bottom: calc(var(--space-unit) * 4);
}

.hero__lead {
  font-size: 1.125rem;
  max-width: 40rem;
  color: var(--color-text-muted);
}

[data-theme="high-contrast"] .hero__lead {
  color: var(--color-text);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space-unit) * 2);
  margin-top: calc(var(--space-unit) * 3);
}

.cards {
  display: grid;
  gap: calc(var(--space-unit) * 3);
  grid-template-columns: 1fr;
}

@media (min-width: 40rem) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }

  h1 {
    font-size: 2rem;
  }
}

@media (min-width: 64rem) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: calc(var(--space-unit) * 3);
  box-shadow: var(--shadow-sm);
}

.card h2 {
  margin-bottom: calc(var(--space-unit) * 1);
  color: var(--color-brand);
}

[data-theme="high-contrast"] .card h2 {
  color: var(--color-text);
}

.prose {
  max-width: 45rem;
}

.prose h2 {
  margin-top: calc(var(--space-unit) * 4);
}

.badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}