/* ==========================================================================
   RustPress Enterprise Theme - Responsive Styles
   ========================================================================== */

/* ========== Large Screens (1400px+) ========== */
@media (min-width: 1400px) {
  .container {
    max-width: 1400px;
  }

  .hero-title {
    font-size: 5rem;
  }
}

/* ========== Desktop (1024px - 1200px) ========== */
@media (max-width: 1200px) {
  .mega-menu {
    width: 700px;
  }

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

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

/* ========== Tablet Landscape (768px - 1024px) ========== */
@media (max-width: 1024px) {
  :root {
    --header-height: 70px;
  }

  /* Hide desktop navigation */
  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .hidden-mobile {
    display: none !important;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + var(--space-12));
    padding-bottom: var(--space-12);
  }

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

  .hero-stats {
    gap: var(--space-8);
  }

  /* Two Column Layouts */
  .layout-two-col,
  .ai-showcase-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  /* Features */
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  /* Comparison */
  .comparison-table {
    font-size: var(--text-sm);
  }

  .comparison-table th,
  .comparison-table td {
    padding: var(--space-3) var(--space-4);
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

  .footer-brand {
    grid-column: span 2;
    max-width: none;
  }

  /* Donation */
  .donation-tiers {
    grid-template-columns: 1fr;
  }

  .donation-tier.featured {
    transform: none;
    order: -1;
  }

  .donation-tier.featured:hover {
    transform: translateY(-4px);
  }
}

/* ========== Tablet Portrait (640px - 768px) ========== */
@media (max-width: 768px) {
  :root {
    --section-padding: 4rem;
  }

  /* Typography */
  .display-1 {
    font-size: var(--text-4xl);
  }

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

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

  /* Hero */
  .hero-title {
    font-size: var(--text-3xl);
  }

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

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

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

  .hero-stats {
    flex-direction: column;
    gap: var(--space-6);
    text-align: center;
  }

  .hero-stat {
    text-align: center;
  }

  /* Features */
  .features-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    padding: var(--space-6);
  }

  /* Stats */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .stat-value {
    font-size: var(--text-3xl);
  }

  .stat-item {
    padding: var(--space-4);
  }

  /* Ecosystem */
  .ecosystem-cards {
    grid-template-columns: 1fr;
  }

  /* Comparison Table */
  .comparison-table-wrapper {
    overflow-x: auto;
    margin: 0 calc(var(--container-padding) * -1);
    padding: 0 var(--container-padding);
  }

  .comparison-table {
    min-width: 600px;
  }

  /* Contact */
  .contact-form {
    padding: var(--space-6);
  }

  /* CTA */
  .cta-title {
    font-size: var(--text-3xl);
  }

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

  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

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

  .footer-brand .logo {
    justify-content: center;
  }

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

  .footer-column {
    text-align: center;
  }

  .footer-links {
    align-items: center;
  }

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

  .footer-legal {
    justify-content: center;
  }

  /* Gallery */
  .gallery-nav {
    width: 40px;
    height: 40px;
  }

  .gallery-caption {
    padding: var(--space-4);
  }

  .gallery-caption h4 {
    font-size: var(--text-lg);
  }
}

/* ========== Mobile (up to 640px) ========== */
@media (max-width: 640px) {
  :root {
    --header-height: 64px;
    --section-padding: 3rem;
    --container-padding: 1rem;
  }

  /* Header */
  .header-actions {
    gap: var(--space-2);
  }

  .header-actions .btn--primary {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }

  .header-actions .btn--primary svg {
    display: none;
  }

  /* Hero */
  .hero {
    padding-top: calc(var(--header-height) + var(--space-8));
    padding-bottom: var(--space-8);
  }

  .hero-badge {
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-3);
  }

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

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

  /* Buttons */
  .btn--lg {
    padding: var(--btn-padding-y) var(--btn-padding-x);
    font-size: var(--text-sm);
  }

  /* Cards */
  .card {
    padding: var(--space-4);
  }

  .feature-card {
    padding: var(--space-4);
  }

  .feature-card__icon {
    width: 56px;
    height: 56px;
  }

  /* Stats */
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
  }

  .stat-item {
    padding: var(--space-3);
  }

  .stat-value {
    font-size: var(--text-2xl);
  }

  .stat-label {
    font-size: var(--text-xs);
  }

  /* AI Showcase */
  .ai-demo-content {
    padding: var(--space-4);
  }

  .ai-tool-item {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }

  /* Donation */
  .donation-tier {
    padding: var(--space-6);
  }

  .donation-amount {
    font-size: var(--text-3xl);
  }

  /* Contact */
  .contact-form {
    padding: var(--space-4);
  }

  .contact-item {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }

  /* Back to Top */
  .back-to-top {
    width: 40px;
    height: 40px;
    bottom: var(--space-4);
    right: var(--space-4);
  }

  /* Scroll Progress */
  .scroll-progress {
    height: 2px;
  }
}

/* ========== Small Mobile (up to 375px) ========== */
@media (max-width: 375px) {
  :root {
    --container-padding: 0.75rem;
  }

  .hero-title {
    font-size: 1.75rem;
  }

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

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

/* ========== Mobile Menu Styles ========== */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  visibility: hidden;
}

.mobile-menu.active {
  visibility: visible;
}

.mobile-menu-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.mobile-menu.active .mobile-menu-backdrop {
  opacity: 1;
}

.mobile-menu-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 400px;
  background: var(--color-bg-primary);
  transform: translateX(100%);
  transition: transform var(--duration-normal) var(--ease-out);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

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

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.mobile-menu-close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-lg);
  transition: all var(--duration-fast) var(--ease-out);
}

.mobile-menu-close:hover {
  background: var(--color-glass);
  color: var(--color-text-primary);
}

.mobile-nav {
  flex: 1;
  padding: var(--space-4) var(--space-6);
}

.mobile-nav-group {
  border-bottom: 1px solid var(--border-color);
}

.mobile-nav-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  cursor: pointer;
}

.mobile-nav-toggle .toggle-icon {
  transition: transform var(--duration-fast) var(--ease-out);
}

.mobile-nav-group.active .toggle-icon {
  transform: rotate(180deg);
}

.mobile-nav-submenu {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal) var(--ease-out);
}

.mobile-nav-group.active .mobile-nav-submenu {
  max-height: 500px;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-1);
  transition: all var(--duration-fast) var(--ease-out);
}

.mobile-nav-link:hover {
  background: var(--color-glass);
  color: var(--color-text-primary);
}

.mobile-nav-link svg {
  width: 18px;
  height: 18px;
  color: var(--color-rust);
}

.mobile-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--border-color);
}

.mobile-nav-item svg {
  width: 20px;
  height: 20px;
  color: var(--color-rust);
}

.mobile-nav-badge {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  background: var(--color-rust);
  color: white;
  border-radius: var(--radius-full);
  margin-left: auto;
}

.mobile-menu-footer {
  padding: var(--space-6);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.mobile-menu-social {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  padding-top: var(--space-4);
}

.mobile-menu-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.mobile-menu-social a:hover {
  background: var(--color-rust);
  color: white;
}

/* ========== Print Styles ========== */
@media print {
  .site-header,
  .mobile-menu,
  .back-to-top,
  .scroll-progress,
  .bg-effects {
    display: none !important;
  }

  .main-content {
    padding-top: 0;
  }

  body {
    background: white;
    color: black;
  }

  a {
    text-decoration: underline;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
  }
}

/* ========== High Contrast Mode ========== */
@media (prefers-contrast: high) {
  :root {
    --border-color: rgba(255, 255, 255, 0.3);
    --color-text-secondary: #D0D0D0;
  }

  .btn--primary {
    border: 2px solid white;
  }

  .card {
    border-width: 2px;
  }
}

/* ========== Landscape Mobile ========== */
@media (max-height: 500px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + var(--space-4));
    padding-bottom: var(--space-4);
  }

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

  .hero-stats {
    display: none;
  }
}