/* ===================================
   etisone Responsive Styles
   Apple-Inspired Light Theme
   =================================== */

/* ===== Mobile (< 768px) ===== */

@media (max-width: 767px) {
  .nav-center {
    display: none;
  }

  .nav-actions {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  /* Hero stats mobile */
  .hero-stats {
    gap: var(--spacing-lg);
  }

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

  /* About features mobile */
  .about-features {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  /* Contact mobile */
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  /* Services grid mobile */
  .services-grid {
    grid-template-columns: 1fr;
  }

  .hero-symbol-img {
    width: 40px;
    height: 40px;
  }

  .hero-headline {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero-subheadline br {
    display: none;
  }

  /* Division grid: single column */
  .divisions-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }

  /* Pillar grid: single column */
  .pillars-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }

  .pillar-card {
    min-height: auto;
  }

  .pillar-visual {
    height: 160px;
  }

  /* Network grid: single column */
  .network-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }

  .network-card {
    min-height: auto;
  }

  .network-visual {
    height: 160px;
  }

  /* Platform grid: single column */
  .platform-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }

  /* Apps grid: single column */
  .apps-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }

  /* Industries grid: single column on mobile */
  .industries-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }

  /* Services grid: single column on mobile */
  .services-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }

  /* Brands grid: single column on mobile */
  .brands-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }

  /* Sub-hero spacing */
  .sub-hero {
    padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-2xl);
  }

  .footer-links-row {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .footer-legal-row {
    flex-direction: column;
    align-items: center;
  }

  .footer-legal-row a + a::before {
    display: none;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .footer-quote p {
    margin-bottom: var(--spacing-lg);
  }

  /* Floating buttons mobile */
  .floating-buttons {
    bottom: 16px;
    right: 16px;
  }

  .float-btn {
    width: 36px;
    height: 36px;
  }

  .float-btn svg {
    width: 16px;
    height: 16px;
  }

  .float-divider {
    height: 16px;
  }
}

/* ===== Tablet (768px - 1023px) ===== */

@media (min-width: 768px) and (max-width: 1023px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu-mobile {
    display: none;
  }

  .divisions-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
  }

  .division-visual {
    height: 180px;
  }

  .pillars-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
  }

  .pillar-visual {
    height: 180px;
  }

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

  .network-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }

  .network-visual {
    height: 180px;
  }

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

  /* Platform grid: 2 columns on tablet */
  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }

  /* Apps grid: 2 columns on tablet */
  .apps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }

  /* Industries grid: 4 columns on tablet */
  .industries-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
  }
}

/* ===== Desktop (1024px+) ===== */

@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu-mobile {
    display: none;
  }

  .division-card {
    min-height: 420px;
  }

  .division-visual {
    height: 240px;
  }

  .pillar-card {
    min-height: 520px;
  }

  .pillar-visual {
    height: 240px;
  }

  .network-card {
    min-height: 420px;
  }

  .network-visual {
    height: 240px;
  }

  .hero-symbol-img {
    width: 64px;
    height: 64px;
  }
}

/* ===== Large Desktop (1280px+) ===== */

@media (min-width: 1280px) {
  .container {
    max-width: 1200px;
  }

  .hero-headline {
    font-size: 4.5rem;
  }
}

/* ===== Extra Large Desktop (1536px+) ===== */

@media (min-width: 1536px) {
  .container {
    max-width: 1280px;
  }
}

/* ===== Landscape Mobile ===== */

@media (max-width: 767px) and (orientation: landscape) {
  .hero-section {
    min-height: auto;
    padding: var(--spacing-3xl) 0;
  }

  .hero-symbol-img {
    width: 36px;
    height: 36px;
  }
}

/* ===== Print Styles ===== */

@media print {
  .site-header,
  .site-footer {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .hero-section {
    min-height: auto;
    background: white;
  }

  .hero-headline,
  .hero-subheadline,
  .pillar-title,
  .pillar-label,
  .division-title,
  .network-title,
  .network-label {
    color: black;
  }

  .pillar-tagline,
  .pillar-link,
  .brand-name,
  .brand-desc,
  .division-tagline,
  .network-tagline,
  .network-desc,
  .app-card-desc,
  .platform-card-desc,
  .industry-item-desc {
    color: #333;
  }

  .pillar-card,
  .division-card,
  .network-card,
  .app-card,
  .platform-card,
  .industry-item {
    background: white;
    border: 1px solid #ccc;
    opacity: 1;
    transform: none;
    box-shadow: none;
  }

  .pillar-visual,
  .division-visual,
  .network-visual {
    display: none;
  }

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

/* ===== Touch Device Optimizations ===== */

@media (hover: none) and (pointer: coarse) {
  .btn {
    min-height: 44px;
    min-width: 44px;
  }

  .nav-list-mobile a {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .division-card:hover {
    transform: none;
    box-shadow: var(--shadow-card);
  }

  .division-card:active {
    transform: scale(0.99);
  }

  .pillar-card:hover {
    box-shadow: var(--shadow-card);
  }

  .pillar-card:active {
    box-shadow: var(--shadow-card-hover);
  }

  .network-card:hover {
    box-shadow: var(--shadow-card);
  }

  .network-card:active {
    box-shadow: var(--shadow-card-hover);
  }

  .app-card:hover {
    transform: none;
    box-shadow: var(--shadow-card);
  }

  .app-card:active {
    transform: scale(0.99);
  }

  .btn:active {
    transform: scale(0.97);
  }
}

/* ===== Accessibility: High Contrast ===== */

@media (prefers-contrast: high) {
  .pillar-card,
  .division-card,
  .network-card,
  .app-card,
  .platform-card,
  .industry-item {
    border: 2px solid var(--color-gray-400);
  }

  .btn-ghost {
    border-width: 2px;
  }

  .pillar-link,
  .division-link {
    text-decoration: underline;
  }
}

/* ===== Accessibility: Reduced Transparency ===== */

@media (prefers-reduced-transparency) {
  .site-header {
    background-color: #ffffff;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav-menu-mobile {
    background-color: #ffffff;
  }
}

/* ===== Accessibility: Reduced Motion ===== */

@media (prefers-reduced-motion: reduce) {
  .hero-symbol-img,
  .hero-headline,
  .hero-subheadline,
  .hero-cta {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }

  .pillar-card,
  .division-card,
  .network-card {
    opacity: 1 !important;
    transform: none !important;
  }

  .hero-slide img {
    transform: none !important;
    transition: none !important;
  }

  .hero-slide {
    transition: none !important;
  }

  .hero-label,
  .hero-headline,
  .hero-subheadline {
    animation: none !important;
    opacity: 1 !important;
  }
}

/* ===== Utility: Show/Hide ===== */

.hide-mobile {
  display: none;
}

@media (min-width: 768px) {
  .hide-mobile {
    display: block;
  }

  .show-mobile {
    display: none;
  }
}

@media (min-width: 1024px) {
  .hide-desktop {
    display: none;
  }
}