/* Tablet Styles */
@media (max-width: 768px) {
    /* Navigation */
    .nav-menu {
      position: fixed;
      left: -100%;
      top: var(--header-height);
      flex-direction: column;
      background-color: var(--white);
      width: 100%;
      text-align: center;
      transition: 0.3s;
      box-shadow: var(--shadow-lg);
      padding: var(--space-8) 0;
      gap: var(--space-6);
      border-top: 1px solid var(--gray-200);
    }
  
    [data-theme="dark"] .nav-menu {
      background-color: var(--white);
      border-top-color: var(--gray-200);
    }
  
    .nav-menu.active {
      left: 0;
    }
  
    .hamburger {
      display: flex;
    }
  
    .hamburger.active .bar:nth-child(2) {
      opacity: 0;
    }
  
    .hamburger.active .bar:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }
  
    .hamburger.active .bar:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }
  
    /* Hero Section */
    .hero-container {
      grid-template-columns: 1fr;
      gap: var(--space-8);
      text-align: center;
    }
  
    .hero-title {
      font-size: var(--text-3xl);
    }
  
    .hero-buttons {
      justify-content: center;
    }
  
    /* Projects Grid */
    .projects-grid {
      grid-template-columns: 1fr;
      gap: var(--space-6);
    }
  
    /* Skills Grid */
    .skills-grid {
      grid-template-columns: 1fr;
      gap: var(--space-6);
    }
  
    /* Filter Controls */
    .filter-controls {
      gap: var(--space-4);
    }
  
    .filter-buttons {
      gap: var(--space-2);
    }
  
    .filter-btn {
      padding: var(--space-2) var(--space-3);
      font-size: var(--text-xs);
    }
  
    /* About Page */
    .about-content {
      grid-template-columns: 1fr;
      gap: var(--space-8);
      text-align: center;
    }
  
    .about-stats {
      justify-content: center;
      gap: var(--space-6);
    }
  
    /* Skills Matrix */
    .skills-categories {
      grid-template-columns: 1fr;
      gap: var(--space-6);
    }
  
    /* Timeline */
    .timeline::before {
      left: 15px;
    }
  
    .timeline-item {
      padding-left: var(--space-12);
    }
  
    .timeline-marker {
      left: 7px;
    }
  
    /* Contact Page */
    .contact-content {
      grid-template-columns: 1fr;
      gap: var(--space-8);
    }
  
    /* Footer */
    .footer-content {
      grid-template-columns: 1fr;
      gap: var(--space-6);
      text-align: center;
    }
  
    .social-links {
      justify-content: center;
    }
  
    /* Certifications */
    .cert-grid {
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: var(--space-4);
    }
  
    /* FAQ */
    .faq-grid {
      grid-template-columns: 1fr;
      gap: var(--space-6);
    }
  }
  
  /* Mobile Styles */
  @media (max-width: 480px) {
    /* Base */
    .container {
      padding: 0 var(--space-4);
    }
  
    /* Typography */
    .section-title {
      font-size: var(--text-2xl);
    }
  
    .page-title {
      font-size: var(--text-3xl);
    }
  
    .hero-title {
      font-size: var(--text-2xl);
    }
  
    /* Navigation */
    .nav-container {
      padding: 0 var(--space-4);
    }
  
    .nav-logo a {
      font-size: var(--text-lg);
    }
  
    /* Hero */
    .hero {
      padding: calc(var(--header-height) + var(--space-12)) 0 var(--space-12);
    }
  
    .hero-description {
      font-size: var(--text-base);
    }
  
    .hero-buttons {
      flex-direction: column;
      align-items: center;
      gap: var(--space-3);
    }
  
    .btn {
      width: 100%;
      max-width: 280px;
    }
  
    /* Sections */
    .section {
      padding: var(--space-12) 0;
    }
  
    .featured-projects,
    .skills-overview,
    .skills-matrix,
    .timeline-section,
    .certifications,
    .contact-section,
    .faq-section {
      padding: var(--space-12) 0;
    }
  
    /* Project Cards */
    .project-card {
      margin-bottom: var(--space-4);
    }
  
    .project-content {
      padding: var(--space-4);
    }
  
    .project-metrics {
      gap: var(--space-4);
    }
  
    /* Skills */
    .skill-category {
      padding: var(--space-6);
    }
  
    .about-stats {
      flex-direction: column;
      gap: var(--space-4);
    }
  
    /* Timeline */
    .timeline-content {
      padding: var(--space-4);
    }
  
    /* Contact Form */
    .contact-form-container {
      padding: var(--space-6);
    }
  
    .contact-method {
      flex-direction: column;
      text-align: center;
      gap: var(--space-2);
    }
  
    .contact-icon {
      margin: 0 auto;
    }
  
    /* Filter Controls */
    .search-container {
      max-width: 100%;
    }
  
    .filter-buttons {
      flex-direction: column;
      width: 100%;
    }
  
    .filter-btn {
      width: 100%;
    }
  
    .tech-select {
      width: 100%;
    }
  
    /* Floating Card */
    .floating-card {
      padding: var(--space-4);
    }
  
    .code-preview {
      font-size: var(--text-xs);
    }
  
    /* Page Headers */
    .page-header {
      padding: calc(var(--header-height) + var(--space-8)) 0 var(--space-8);
    }
  
    .page-subtitle {
      font-size: var(--text-base);
    }
  
    /* Utility adjustments */
    .space-responsive {
      margin-bottom: var(--space-4);
    }
  }
  
  /* Large Desktop Styles */
  @media (min-width: 1400px) {
    .hero-container {
      gap: var(--space-20);
    }
  
    .hero-title {
      font-size: var(--text-5xl);
    }
  
    .projects-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  
    .skills-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  
    .footer-content {
      grid-template-columns: 3fr 1fr 1fr;
    }
  }
  
  /* Print Styles */
  @media print {
    .navbar,
    .hamburger,
    .theme-toggle,
    .btn,
    .contact-form,
    .footer {
      display: none;
    }
  
    body {
      font-size: 12pt;
      line-height: 1.4;
      color: #000;
      background: #fff;
    }
  
    .hero {
      padding: var(--space-8) 0;
    }
  
    .section {
      padding: var(--space-6) 0;
    }
  
    .project-card,
    .skill-category,
    .timeline-content {
      box-shadow: none;
      border: 1px solid #ccc;
    }
  
    a {
      color: #000;
      text-decoration: underline;
    }
  
    .page-header {
      background: none;
      color: #000;
    }
  }
  
  /* Reduced Motion */
  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  
    .floating-card {
      animation: none;
    }
  
    .spinner {
      animation: none;
    }
  }
  
  /* High Contrast Mode */
  @media (prefers-contrast: high) {
    :root {
      --primary-color: #0000ff;
      --gray-600: #000000;
      --gray-700: #000000;
      --gray-800: #000000;
      --gray-900: #000000;
    }
  
    .btn-primary {
      border: 2px solid #000;
    }
  
    .btn-secondary,
    .btn-outline {
      border: 2px solid #000;
      color: #000;
    }
  
    .project-card,
    .skill-category,
    .timeline-content {
      border: 2px solid #000;
    }
  }
  
  /* Focus Styles for Accessibility */
  .btn:focus,
  .nav-link:focus,
  .search-input:focus,
  .filter-btn:focus,
  input:focus,
  select:focus,
  textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
  }
  
  /* Skip Link for Screen Readers */
  .skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius);
    z-index: 10000;
  }
  
  .skip-link:focus {
    top: 6px;
  }