/* ========================================
   Responsive Design - Mobile First
   ======================================== */

/* Tablet and Mobile (768px and below) */
@media (max-width: 768px) {
  /* Typography adjustments */
  :root {
    --font-size-3xl: 2rem;
    --font-size-2xl: 1.5rem;
    --font-size-xl: 1.25rem;
  }

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

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-background);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
    gap: var(--spacing-sm);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-menu a {
    padding: var(--spacing-xs) 0;
    display: block;
  }

  /* Hero section */
  .hero-newsletter {
    padding: var(--spacing-xl) 0;
  }

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

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

  /* Newsletter form */
  .form-group {
    flex-direction: column;
  }

  .form-group button {
    width: 100%;
  }

  /* About page */
  .about-header {
    flex-direction: column;
    text-align: center;
  }

  .about-image img {
    width: 150px;
    height: 150px;
  }

  /* Blog grid */
  .blog-grid {
    grid-template-columns: 1fr;
  }

  /* Skills grid */
  .skills-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }

  /* Author bio */
  .author-bio {
    flex-direction: column;
    text-align: center;
  }

  .author-social {
    justify-content: center;
  }

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

  .about-content,
  .blog-content,
  .section-youtube {
    padding: var(--spacing-xl) 0;
  }
}

/* Small Mobile (576px and below) */
@media (max-width: 576px) {
  /* Typography */
  :root {
    --font-size-base: 0.875rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.35rem;
    --font-size-xl: 1.125rem;
    --container-padding: 0.75rem;
  }

  /* Navigation brand */
  .nav-brand a {
    font-size: var(--font-size-lg);
  }

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

  /* Buttons */
  .btn-primary,
  .btn-youtube {
    font-size: var(--font-size-base);
    padding: var(--spacing-sm) var(--spacing-md);
  }

  /* Hero */
  .hero-newsletter {
    padding: var(--spacing-md) 0;
  }

  /* About image */
  .about-image img {
    width: 120px;
    height: 120px;
  }

  /* Skills grid - smaller on mobile */
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Post card images */
  .post-card-image img {
    height: 180px;
  }

  /* Author image in post */
  .author-image {
    width: 60px;
    height: 60px;
  }

  /* Error page */
  .error-content h1 {
    font-size: 3rem;
  }

  /* Footer */
  .footer-social {
    gap: var(--spacing-sm);
  }

  .footer-social a {
    font-size: var(--font-size-lg);
  }
}

/* Large Desktop (1200px and up) */
@media (min-width: 1200px) {
  :root {
    --font-size-3xl: 3rem;
    --font-size-2xl: 2.25rem;
  }

  .hero-title {
    font-size: 3rem;
  }

  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Print styles */
@media print {
  .site-header,
  .site-footer,
  .mobile-menu-toggle,
  .newsletter-form,
  .btn-primary,
  .btn-youtube {
    display: none;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
    color: black;
  }

  a {
    color: black;
    text-decoration: underline;
  }
}

/* Accessibility: Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Dark mode is now the default theme */