/* ============================================
   RESPONSIVE STYLES
   ============================================
   Mobile-first responsive design
   Breakpoints:
   - Base: 320px+ (Mobile)
   - Small: 640px+ (Large mobile)
   - Medium: 768px+ (Tablet)
   - Large: 1024px+ (Desktop)
   - XLarge: 1280px+ (Wide desktop)
   ============================================ */


/* ========== TABLET (768px and up) ========== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: var(--text-5xl);
  }

  .section-title {
    font-size: var(--text-3xl);
  }

  .portfolio-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

/* ========== TABLET (768px and below) ========== */
@media (max-width: 768px) {
  /* Typography adjustments */
  h1 {
    font-size: var(--text-4xl);
  }

  h2 {
    font-size: var(--text-3xl);
  }

  .hero-title {
    font-size: var(--text-4xl);
  }

  .hero-subtitle {
    font-size: var(--text-xl);
  }

  /* Spacing adjustments */
  .section {
    padding: var(--spacing-4xl) 0;
  }

  /* Navigation - Mobile menu */
  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 72px);
    background-color: white;
    flex-direction: column;
    padding: var(--spacing-2xl);
    transition: left var(--transition-base);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    left: 0;
  }

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

  /* About section - stack vertically */
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }

  /* Timeline adjustments for mobile */
  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    padding-left: 60px;
  }

  .timeline-item::before {
    left: 12px;
  }

  /* Portfolio grid - 1 column */
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  /* Certifications grid */
  .cert-grid {
    grid-template-columns: 1fr;
  }

  /* Skills grid */
  .skills-grid {
    grid-template-columns: 1fr;
  }

  /* Grid utilities */
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  /* Modal adjustments */
  .modal {
    padding: var(--spacing-md);
  }

  .modal-body {
    padding: var(--spacing-xl);
  }

  .modal-image {
    height: 250px;
  }

  .modal-embed {
    height: 400px;
  }

  /* Experience modal adjustments */
  .experience-modal {
    padding: var(--spacing-md);
  }

  .experience-modal-header {
    padding: var(--spacing-xl);
  }

  .experience-modal-body {
    padding: var(--spacing-xl);
  }

  .experience-modal-title {
    font-size: var(--text-2xl);
  }

  .experience-modal-company {
    font-size: var(--text-lg);
  }

  /* Contact links */
  .contact-links {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-link {
    justify-content: center;
  }

  /* Hero buttons */
  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .hero .btn {
    width: 100%;
  }
}

/* ========== MOBILE (640px and below) ========== */
@media (max-width: 640px) {
  /* Further typography reductions */
  .hero-title {
    font-size: var(--text-3xl);
  }

  .hero-subtitle {
    font-size: var(--text-lg);
  }

  .hero-description {
    font-size: var(--text-base);
  }

  .section-title {
    font-size: var(--text-2xl);
  }

  /* Reduce spacing */
  .section {
    padding: var(--spacing-3xl) 0;
  }

  .section-heading {
    margin-bottom: var(--spacing-2xl);
  }

  /* Hero image smaller */
  .hero-image {
    width: 150px;
    height: 150px;
  }

  /* Container padding */
  .container {
    padding: 0 var(--spacing-md);
  }

  /* Timeline more compact */
  .timeline-item {
    padding-left: 50px;
    margin-bottom: var(--spacing-2xl);
  }

  /* Cards less padding */
  .card,
  .experience-card,
  .cert-card,
  .skill-category {
    padding: var(--spacing-lg);
  }

  /* Project cards */
  .project-content {
    padding: var(--spacing-lg);
  }

  .project-thumbnail {
    height: 200px;
  }

  /* Modal */
  .modal-title {
    font-size: var(--text-2xl);
  }

  .modal-meta {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .modal-section h3 {
    font-size: var(--text-xl);
  }

  /* Filter buttons */
  .portfolio-filters {
    gap: var(--spacing-sm);
  }

  .filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--text-sm);
  }

  /* Experience header */
  .experience-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ========== SMALL MOBILE (480px and below) ========== */
@media (max-width: 480px) {
  .hero-title {
    font-size: var(--text-2xl);
  }

  .modal-image {
    height: 200px;
  }

  .modal-embed {
    height: 300px;
  }
}

/* ========== LANDSCAPE PHONE FIX ========== */
@media (max-height: 600px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: var(--spacing-3xl) var(--spacing-lg);
  }

  .hero-image {
    width: 120px;
    height: 120px;
    margin-bottom: var(--spacing-lg);
  }
}