/* MDC v2.1.8.5 — Accessibility & SEO */

/* Skip link */
.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 10000;
  padding: .8rem 1rem;
  border-radius: .65rem;
  color: #fff;
  background: #0b3c5d;
  box-shadow: 0 12px 28px rgba(8,44,74,.24);
  transform: translateY(-180%);
  transition: transform .18s ease;
}
.skip-link:focus {
  transform: translateY(0);
}

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

/* Strong focus states */
:focus-visible {
  outline: 3px solid #2d7a4f !important;
  outline-offset: 3px !important;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  box-shadow: 0 0 0 5px rgba(45,122,79,.14);
}

/* Accessible link distinction */
main p a,
main li a,
main td a {
  text-decoration: underline;
  text-decoration-thickness: .08em;
  text-underline-offset: .18em;
}

/* Form messaging */
.field-error {
  display: block;
  margin-top: .35rem;
  color: #9b1c1c;
  font-size: .88rem;
  font-weight: 700;
}
[aria-invalid="true"] {
  border-color: #b42318 !important;
  box-shadow: 0 0 0 4px rgba(180,35,24,.10) !important;
}

/* Motion-safe */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

/* High contrast support */
@media (forced-colors: active) {
  .btn,
  .button,
  .cta-button,
  .card,
  .service-card,
  .research-card,
  .project-card,
  .expert-card,
  .course-card,
  .publication-card {
    forced-color-adjust: auto;
    border: 1px solid CanvasText !important;
  }
}

/* Better text scaling */
@media (max-width: 680px) {
  body {
    line-height: 1.65;
  }
}