/* ============================================
   Utilities — Helper Classes
   ============================================ */

/* Screen reader only — visually hidden but accessible */
.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-to-content link — hidden until focused */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-md);
  font-weight: var(--weight-semibold);
  z-index: 100;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-md);
}

/* Text balance — better line breaks for headings */
.text-balance {
  text-wrap: balance;
}

/* Text center */
.text-center {
  text-align: center;
}

/* Flex utilities */
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

/* Margin utilities */
.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

/* Padding utilities */
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.px-md { padding-inline: var(--space-md); }
.px-lg { padding-inline: var(--space-lg); }
.py-sm { padding-block: var(--space-sm); }
.py-md { padding-block: var(--space-md); }
.py-lg { padding-block: var(--space-lg); }

/* Reduced motion — disable animations, show everything immediately */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-stagger > * {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .reveal-stagger.visible > *:nth-child(1),
  .reveal-stagger.visible > *:nth-child(2),
  .reveal-stagger.visible > *:nth-child(3),
  .reveal-stagger.visible > *:nth-child(4) {
    transition-delay: 0ms;
  }
}