.text-center { text-align: center; }
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.bg-surface { background: var(--surface); }
.rounded { border-radius: var(--radius); }
.shadow { box-shadow: var(--shadow); }

@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
}
@media (min-width: 769px) {
  .show-mobile-only { display: none !important; }
}

img[loading="lazy"] { background: var(--color-light-gray); }

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-navy);
  color: #fff;
  padding: 0.75rem 1.25rem;
  z-index: 999;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }