/* Mobile-specific fixes for navigation and hero section */

/* Improved mobile navigation */
@media (max-width: 768px) {
  /* Make header more compact */
  .page-header {
    padding: var(--space-md) 0;
  }
  
  .header-container {
    flex-direction: row !important;
    flex-wrap: wrap;
    gap: var(--space-md);
    position: relative;
  }
  
  /* Logo stays in top left, compact size */
  .header-logo {
    font-size: var(--font-size-base);
    gap: var(--space-sm);
  }
  
  .header-logo img {
    height: 32px;
    width: 32px;
  }
  
  .header-logo span {
    font-size: 0.9rem;
  }
  
  /* Hamburger menu button */
  .mobile-menu-toggle {
    display: flex !important;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10;
    order: 1;
    margin-left: auto;
    margin-right: var(--space-sm);
  }
  
  .mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background: var(--color-text-primary);
    border-radius: 10px;
    transition: all 0.3s linear;
    position: relative;
    transform-origin: 1px;
  }
  
  .mobile-menu-toggle.open span:first-child {
    transform: rotate(45deg);
  }
  
  .mobile-menu-toggle.open span:nth-child(2) {
    opacity: 0;
    transform: translateX(20px);
  }
  
  .mobile-menu-toggle.open span:nth-child(3) {
    transform: rotate(-45deg);
  }
  
  /* Hide navigation menu on mobile by default */
  .header-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    order: 3;
    background: var(--color-background);
    border-top: 1px solid var(--color-border);
    padding: var(--space-md) 0;
    animation: slideDown 0.3s ease-out;
  }
  
  .header-nav.mobile-open {
    display: flex !important;
  }
  
  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  .header-nav .nav {
    flex-direction: column;
    gap: 0;
  }
  
  .header-nav .nav-link {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
    text-decoration: none;
  }
  
  .header-nav .nav-link:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
  }
  
  /* Theme toggle button stays visible in top right */
  .header-actions {
    order: 2;
  }
  
  /* Hero section mobile improvements */
  .hero {
    padding: var(--space-2xl) var(--space-md);
    margin-bottom: var(--space-xl);
    border-radius: var(--radius-lg);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
    line-height: 1.2;
    margin-bottom: var(--space-md);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-lg);
    padding: 0 var(--space-sm);
  }
  
  /* Stack buttons vertically on small screens */
  .hero .flex {
    flex-direction: column;
    gap: var(--space-md);
    width: 100%;
    padding: 0 var(--space-md);
  }
  
  .hero .btn {
    width: 100%;
    max-width: 300px;
  }
  
  /* Fix About section gradient background on mobile */
  .section[style*="linear-gradient"] {
    padding: var(--space-lg) var(--space-md) !important;
    margin: var(--space-lg) 0 !important;
    border-radius: var(--radius-md) !important;
  }
  
  /* Reduce stat card minimum width */
  .stats {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-md);
  }
  
  .stat-value {
    font-size: var(--font-size-3xl);
  }
  
  .stat-label {
    font-size: var(--font-size-xs);
  }
  
  /* Fix card grid on mobile */
  .card-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  /* Reduce padding on cards for mobile */
  .card {
    padding: var(--space-lg);
  }
}

/* Extra small screens (< 375px) */
@media (max-width: 374px) {
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .header-logo span {
    display: none;
  }
  
  .stats {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   KNOWLEDGE GRAPH MOBILE FIXES
   ======================================== */

@media (max-width: 768px) {
  /* Make details panel a bottom sheet on mobile */
  #details-panel {
    position: fixed !important;
    top: auto !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    max-width: 100% !important;
    max-height: 70vh !important;
    height: auto !important;
    width: 100% !important;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0 !important;
    box-shadow: 0 -10px 25px rgba(0, 0, 0, 0.2) !important;
    transition: transform 0.3s ease-out !important;
    z-index: 1000 !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    -webkit-overflow-scrolling: touch !important;
  }
  
  /* Add a handle bar at the top for dragging down */
  #details-panel::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
  }
  
  /* Add close button for mobile */
  #details-panel::after {
    content: '✕';
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 24px;
    font-weight: 300;
    color: var(--color-text-secondary);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-background-alt);
    transition: all 0.2s ease;
    z-index: 10;
  }
  
  #details-panel:hover::after {
    background: var(--color-border);
    color: var(--color-text-primary);
  }
  
  /* Adjust content padding for handle */
  #details-content {
    padding-top: var(--space-lg);
  }
  
  /* Add overlay backdrop when panel is open */
  #details-panel:not(.hidden)::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: -1;
    pointer-events: all;
  }
  
  /* Hide graph legend on mobile when panel is open */
  #details-panel:not(.hidden) ~ .graph-legend {
    display: none !important;
  }
  
  /* Adjust graph viewport to account for bottom sheet */
  .graph-viewport {
    height: calc(100vh - 200px) !important;
  }
  
  /* Make graph controls stack better on mobile */
  .graph-controls {
    top: var(--space-sm);
    right: var(--space-sm);
    gap: var(--space-xs);
  }
  
  .graph-controls .btn-sm {
    padding: var(--space-xs);
    min-width: 36px;
    min-height: 36px;
  }
  
  /* Adjust legend position for mobile */
  .graph-legend {
    position: absolute;
    bottom: var(--space-md);
    left: var(--space-md);
    right: auto;
    max-width: 150px;
    font-size: 0.8rem;
    padding: var(--space-sm);
  }
  
  .graph-legend h4 {
    font-size: 0.75rem;
    margin-bottom: var(--space-xs);
  }
  
  .legend-item {
    margin-bottom: var(--space-xs);
  }
  
  .legend-color {
    width: 12px;
    height: 12px;
    margin-right: var(--space-xs);
  }
}