/* ==========================================================================
   GZTONGCHEN.COM - Responsive Styles
   ========================================================================== */

/* Tablet and below (max-width: 1024px)
   ========================================================================== */
@media (max-width: 1024px) {
  :root {
    --header-h: 64px;
  }

  .container {
    padding: 0 24px;
  }

  .section {
    padding: 80px 0;
  }

  .section-lg {
    padding: 100px 0;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .header-cta .btn {
    display: none;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .footer-brand {
    grid-column: span 2;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .stat-item:nth-child(2)::after,
  .stat-item:nth-child(4)::after {
    display: none;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .news-featured {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    margin-bottom: 60px;
  }
}

/* Mobile (max-width: 768px)
   ========================================================================== */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .container {
    padding: 0 20px;
  }

  .section {
    padding: 64px 0;
  }

  .section-lg {
    padding: 80px 0;
  }

  h1 { font-size: clamp(2rem, 8vw, 3rem); }
  h2 { font-size: clamp(1.5rem, 6vw, 2.25rem); }
  h3 { font-size: 1.4rem; }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-bottom-links {
    justify-content: center;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    padding-top: 32px;
  }

  .hero-stat-value {
    font-size: 1.75rem;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

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

  .hero-scroll-indicator {
    display: none;
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    padding: 40px 0;
  }

  .stat-item::after {
    display: none !important;
  }

  .stat-value {
    font-size: 2.25rem;
  }

  .section-header {
    margin-bottom: 48px;
  }

  .section-eyebrow {
    font-size: 11px;
  }

  .contact-form-wrapper {
    padding: 24px;
  }

  .location-info-overlay {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }

  .process-item {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 24px;
  }

  .process-num {
    font-size: 36px;
  }

  .product-grid,
  .news-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }

  .cookie-banner {
    left: 16px;
    right: 16px;
    bottom: 16px;
    padding: 20px;
  }

  .cookie-banner-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .cookie-banner-actions {
    width: 100%;
  }

  .cookie-banner-actions .btn {
    flex: 1;
    justify-content: center;
  }

  .toast {
    left: 16px;
    right: 16px;
    max-width: none;
    bottom: 16px;
  }

  .page-header {
    padding: calc(var(--header-h) + 48px) 0 48px;
  }

  .marquee {
    padding: 24px 0;
  }

  .marquee-item {
    font-size: 12px;
  }
}

/* Small mobile (max-width: 480px)
   ========================================================================== */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 16px;
  }

  .section {
    padding: 48px 0;
  }

  .section-lg {
    padding: 64px 0;
  }

  .hero {
    padding: calc(var(--header-h) + 48px) 0 48px;
    min-height: 90vh;
  }

  .hero-badge {
    font-size: 11px;
    padding: 6px 14px;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .footer-bottom-links {
    flex-direction: column;
    gap: 12px;
  }

  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }

  .cta-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .btn {
    padding: 12px 22px;
    font-size: 14px;
  }

  .btn-lg {
    padding: 14px 28px;
    font-size: 15px;
  }

  .feature-card,
  .card {
    padding: 24px;
  }

  .product-content,
  .news-content,
  .team-card {
    padding: 20px;
  }

  .team-card {
    padding: 24px 20px;
  }

  .faq-question {
    padding: 16px 20px;
    font-size: 15px;
  }

  .faq-answer-content {
    padding: 0 20px 20px;
  }

  .form-control {
    padding: 12px 14px;
    font-size: 14px;
  }

  .legal-content h2 {
    font-size: 20px;
    margin: 32px 0 12px;
  }

  .legal-content h3 {
    font-size: 16px;
  }

  .location-map {
    height: 300px;
  }
}

/* Large screens (min-width: 1440px)
   ========================================================================== */
@media (min-width: 1440px) {
  :root {
    --container-w: 1400px;
  }

  .container {
    padding: 0 32px;
  }

  .section {
    padding: 140px 0;
  }
}

/* 2xl screens (min-width: 1920px)
   ========================================================================== */
@media (min-width: 1920px) {
  :root {
    --container-w: 1600px;
  }

  html {
    font-size: 18px;
  }
}

/* Print styles
   ========================================================================== */
@media print {
  .site-header,
  .site-footer,
  .cookie-banner,
  .menu-toggle,
  .mobile-nav,
  .hero-bg,
  .bg-glow,
  .marquee {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  a {
    text-decoration: underline;
  }
}

/* High contrast / accessibility
   ========================================================================== */
@media (prefers-contrast: high) {
  :root {
    --color-border: rgba(255, 255, 255, 0.3);
    --color-border-2: rgba(255, 255, 255, 0.5);
    --color-text-2: #d0d8ee;
    --color-text-3: #a8b2cc;
  }
}

/* Dark mode preference - already default */
@media (prefers-color-scheme: dark) {
  /* Already dark by default */
}

/* Focus visible for keyboard navigation
   ========================================================================== */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}