/* ==========================================================================
   Responsive Breakpoints & Mobile Adaptations
   ========================================================================== */

/* Tablet & Mobile Breakpoint: <= 860px */
@media screen and (max-width: 860px) {
  /* Grids collapse to single or two columns */
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .footer-grid > :first-child {
    grid-column: span 2;
  }

  .hero-title {
    font-size: 2.25rem;
  }
}

/* Mobile Devices Breakpoint: <= 680px */
@media screen and (max-width: 680px) {
  :root {
    --space-xl: 1.75rem;
    --space-2xl: 2.5rem;
  }

  /* Navigation: Mobile Drawer */
  .nav-toggle {
    display: inline-flex;
  }

  .nav-menu {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-md);
    gap: var(--space-xs);
    box-shadow: var(--shadow-lg);
    border-bottom: 2px solid var(--color-accent);
    display: none;
  }

  /* When mobile menu is active/opened */
  .nav-menu.is-active {
    display: flex;
  }

  .nav-link {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
  }

  .nav-link:hover,
  .nav-link:focus {
    background-color: var(--color-bg-subtle);
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-link.active {
    background-color: var(--color-accent-light);
    border-left: 3px solid var(--color-accent);
  }

  /* Mobile dropdown handling */
  .dropdown-menu {
    position: static;
    box-shadow: none;
    border-radius: 0;
    padding: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    background-color: var(--color-bg-subtle);
    display: none;
  }

  .nav-item-with-dropdown .dropdown-menu {
    display: none;
  }

  .nav-item-with-dropdown.active .dropdown-menu {
    display: block;
  }

  .nav-link-with-arrow::after {
    transform: translateY(-50%) rotate(0deg);
  }

  .nav-item-with-dropdown.active .nav-link-with-arrow::after {
    transform: translateY(-50%) rotate(180deg);
  }

  /* Grid layouts collapse to single column */
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-grid > :first-child {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .hero-description {
    font-size: 1.05rem;
  }

  .page-banner-title {
    font-size: 1.75rem;
  }

  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .contact-email-link {
    word-break: break-all;
    font-size: 1rem;
    padding: var(--space-sm) var(--space-md);
  }

  /* Disable complex animations on mobile for performance */
  .fade-in,
  .slide-up,
  .slide-in-left,
  .slide-in-right,
  .scale-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .card::before {
    display: none;
  }

  .btn::after {
    display: none;
  }
}