/**
 * GLOBAL STYLES & TYPOGRAPHY
 */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

.container-narrow {
  max-width: var(--container-narrow-width);
}

/* Sections */
.section {
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-16);
  position: relative;
}

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

.section-dark {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-text-inverse);
}

.section-dark h1,
.section-dark h2,
.section-dark h3 {
  color: var(--color-text-inverse);
}

.section-dark p {
  color: #CBD5E1;
}

/* Section Headers */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--spacing-12);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-1) var(--spacing-3);
  background-color: var(--color-secondary-bg);
  color: var(--color-secondary);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-3);
  border: 1px solid rgba(2, 132, 199, 0.2);
}

.section-tag.accent {
  background-color: var(--color-accent-light);
  color: #B45309;
  border-color: rgba(245, 158, 11, 0.3);
}

.section-tag.light {
  background-color: rgba(255, 255, 255, 0.15);
  color: #FCD34D;
  border-color: rgba(255, 255, 255, 0.2);
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: var(--spacing-4);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

/* Accessibilité: Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--spacing-4);
  background: var(--color-accent);
  color: var(--color-primary-dark);
  font-weight: 700;
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-md);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--spacing-4);
}

/* Main Content Wrapper */
main {
  flex: 1 0 auto;
}

/* Animations d'apparition */
.reveal-fade {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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