/**
 * Responsive Styles - Mobile-First Approach
 * Breakpoints: Mobile (<768px), Tablet (768-1024px), Desktop (>1024px)
 */

/* ========== Tablet (768px - 1024px) ========== */
@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
    --spacing-3xl: 4rem;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .hero-image {
    order: -1;
  }

  .hero-photo {
    max-width: 300px;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .about-photo {
    max-width: 300px;
    margin: 0 auto;
  }

  .experience-summary {
    grid-template-columns: repeat(2, 1fr);
  }

  .courses-stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .talks-content {
    grid-template-columns: 1fr;
  }

  .talk-topics {
    position: static;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

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

/* ========== Mobile (<768px) ========== */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
    --spacing-3xl: 3rem;
    --spacing-2xl: 2rem;
    --spacing-xl: 1.5rem;
    --container-padding: var(--spacing-sm);
  }

  /* Navigation */
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }

  .nav-menu.active {
    transform: translateX(0);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding-top: 80px;
  }

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

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

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

  .hero-cta {
    flex-direction: column;
  }

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

  .hero-photo {
    max-width: 250px;
  }

  /* About */
  .about-intro {
    font-size: var(--font-size-lg);
  }

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

  /* Experience */
  .experience-item {
    flex-direction: column;
    padding: var(--spacing-lg);
  }

  .experience-summary {
    grid-template-columns: 1fr;
  }

  /* Courses */
  .courses-stats {
    grid-template-columns: 1fr;
  }

  .courses-grid {
    grid-template-columns: 1fr;
  }

  /* YouTube */
  .youtube-grid {
    grid-template-columns: 1fr;
  }

  /* Skills */
  .skill-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--spacing-sm);
  }

  /* Back to Top */
  .back-to-top {
    width: 45px;
    height: 45px;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
  }
}

/* ========== Small Mobile (<480px) ========== */
@media (max-width: 480px) {
  :root {
    --font-size-5xl: 1.75rem;
    --font-size-4xl: 1.5rem;
  }

  .hero-social a {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-lg);
  }

  .stat-card {
    padding: var(--spacing-md);
  }

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

/* ========== Print Styles ========== */
@media print {
  .navbar,
  .hero-cta,
  .hero-social,
  .contact-form,
  .back-to-top {
    display: none;
  }

  body {
    color: var(--color-black);
    background: var(--color-white);
  }

  section {
    page-break-inside: avoid;
  }
}