/* ============================================
   Responsive Styles & Mobile Navigation
   ============================================ */

/* --- Tablet: ≤1024px --- */
@media (max-width: 1024px) {
  .home-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .sidebar {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1.5rem;
  }

  .profile-photo-wrap {
    width: 220px;
  }

  .profile-photo-fallback {
    width: 180px;
    aspect-ratio: 1;
  }

  .sidebar .card {
    flex: 1;
    min-width: 250px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* --- Mobile: ≤768px --- */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  /* Show hamburger */
  .nav-toggle {
    display: block;
  }

  /* Mobile nav panel */
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    gap: 0;
    padding: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
    z-index: 999;
  }

  body.nav-open .nav-links {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border);
    border-left: 3px solid transparent;
    border-bottom-width: 1px;
  }

  .nav-links a:hover,
  .nav-links a.active {
    border-bottom: 1px solid var(--border);
    border-left-color: var(--uq-purple);
    background: var(--bg-secondary);
  }

  /* Hero */
  .hero h1 {
    font-size: 2rem;
  }

  .hero .tags {
    gap: 0.4rem;
  }

  /* Section titles */
  .section-title {
    font-size: 1.4rem;
  }

  /* Card grid */
  .card-grid {
    grid-template-columns: 1fr;
  }

  /* Sidebar */
  .sidebar {
    flex-direction: column;
  }

  .profile-photo-wrap {
    width: 200px;
    margin: 0 auto;
    border-width: 6px;
    border-radius: 24px;
  }

  .profile-photo-fallback {
    width: 150px;
    margin: 0 auto;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* Container padding */
  .container {
    padding: 0 1.25rem;
  }

  /* Page header */
  .page-header h1 {
    font-size: 1.6rem;
  }

  /* Media cards */
  .media-card {
    flex-direction: column;
  }

  .media-card .media-icon {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
  }

  /* Featured media */
  .featured-media {
    padding: 1.25rem;
  }

  /* Student items */
  .student-item {
    flex-direction: column;
    gap: 0.25rem;
  }

  .student-item .student-name {
    min-width: auto;
  }

  /* Blog callout */
  .blog-callout {
    flex-direction: column;
    text-align: center;
  }
}

/* --- Small Mobile: ≤480px --- */
@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.65rem;
  }

  .hero .subtitle {
    font-size: 1rem;
  }

  .tag {
    font-size: 0.72rem;
    padding: 0.2rem 0.65rem;
  }

  .section-title {
    font-size: 1.25rem;
  }

  .card {
    padding: 1.15rem;
  }

  .home-grid {
    padding-top: 2rem;
    padding-bottom: 2rem;
  }

  .page-content {
    padding: 2rem 0;
  }

  .grant-item {
    padding: 1rem;
  }

  .btn-primary {
    width: 100%;
    text-align: center;
  }
}