/* ==========================================================================
   4. Structural Layout & Containers
   ========================================================================== */
.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: min(calc(100% - 2.5rem), var(--epna-content-width));
  margin-inline: auto;
}

.container--narrow {
  width: min(calc(100% - 2.5rem), var(--epna-narrow-width));
  margin-inline: auto;
}

.site-main {
  flex: 1 0 auto;
  padding-block: var(--epna-space-2xl);
}

/* Section Rhythm */
.epna-section {
  padding-block: var(--epna-space-3xl);
  position: relative;
}

.epna-section--alt {
  background-color: var(--epna-dark-surface);
}

.epna-section--darker {
  background-color: #0b1120;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
  margin-block-end: var(--epna-space-2xl);
}

.section-header .section-eyebrow {
  display: inline-block;
  color: var(--epna-cyan);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-block-end: var(--epna-space-xs);
}

.section-header .section-title {
  margin-block-end: var(--epna-space-sm);
}

.section-header .section-desc {
  color: var(--epna-gray-light);
  font-size: 1rem;
  margin-block-end: 0;
}

/* Grids & Cards */
.epna-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--epna-space-xl);
}

.epna-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--epna-space-xl);
}

.epna-card {
  background-color: var(--epna-dark-surface);
  border: 1px solid var(--epna-slate-border);
  border-radius: var(--epna-radius-md);
  padding: var(--epna-space-xl);
  transition: transform var(--epna-transition-normal),
              border-color var(--epna-transition-normal),
              box-shadow var(--epna-transition-normal);
  position: relative;
  overflow: hidden;
}

.epna-card:hover {
  transform: translateY(-4px);
  border-color: var(--epna-cyan);
  box-shadow: var(--epna-shadow-lg), 0 0 20px var(--epna-cyan-glow);
}

.epna-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-block-end: var(--epna-space-md);
}

.schematic-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--epna-radius-sm);
  background-color: var(--epna-dark-card);
  border: 1px solid var(--epna-slate-border);
  color: var(--epna-cyan);
}

.schematic-icon-wrap svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

/* ==========================================================================
   5. Semantic Site Header & Brand Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 1000;
  background-color: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-block-end: 1px solid var(--epna-slate-border);
  transition: background-color var(--epna-transition-normal),
              box-shadow var(--epna-transition-normal);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--epna-header-height);
  gap: var(--epna-space-lg);
}

/* Branding */
.site-branding {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.site-brand-link {
  display: inline-flex;
  align-items: center;
  gap: var(--epna-space-sm);
  color: var(--epna-white);
  text-decoration: none;
}

.site-brand-link:hover {
  color: var(--epna-cyan);
}

.brand-logo-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
}

.brand-logo-svg {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-mark-shape {
  display: inline-block;
  width: 38px;
  height: 38px;
  border: 2px solid var(--epna-cyan);
  position: relative;
  transform: rotate(45deg);
  box-shadow: 0 0 12px var(--epna-cyan-glow);
}

.brand-mark-shape::after {
  content: '';
  position: absolute;
  inset: 6px;
  border: 2px solid var(--epna-white);
}

.site-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--epna-white);
  line-height: 1.2;
}

/* Main Navigation */
.main-navigation {
  display: flex;
  align-items: center;
}

.primary-nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--epna-space-xl);
}

.primary-nav-links li {
  position: relative;
}

.primary-nav-links a {
  display: inline-flex;
  align-items: center;
  color: var(--epna-gray-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  padding-block: var(--epna-space-sm);
  transition: color var(--epna-transition-fast);
  text-align: center;
}

.primary-nav-links a:hover,
.primary-nav-links .current-menu-item > a {
  color: var(--epna-cyan);
}

/* Dropdowns */
.primary-nav-links .sub-menu {
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 100%;
  background-color: var(--epna-dark-surface);
  border: 1px solid var(--epna-slate-border);
  border-radius: var(--epna-radius-md);
  padding: var(--epna-space-sm) 0;
  list-style: none;
  min-width: 200px;
  box-shadow: var(--epna-shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--epna-transition-fast),
              transform var(--epna-transition-fast),
              visibility var(--epna-transition-fast);
  z-index: 100;
}

.primary-nav-links li:hover > .sub-menu,
.primary-nav-links li:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.primary-nav-links .sub-menu li {
  padding-inline: var(--epna-space-md);
}

.primary-nav-links .sub-menu a {
  display: block;
  padding-block: 0.4rem;
  font-size: 0.875rem;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--epna-space-md);
}

.header-actions .header-cta {
  white-space: nowrap;
}

/* Modern Hamburger Toggle */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--epna-slate-border);
  border-radius: var(--epna-radius-sm);
  color: var(--epna-white);
  cursor: pointer;
  padding: 0;
  transition: all var(--epna-transition-fast);
}

.menu-toggle:hover,
.menu-toggle.is-active {
  border-color: #0284c7;
  background-color: rgba(2, 132, 199, 0.12);
  color: var(--epna-cyan);
}

.menu-toggle-bars {
  position: relative;
  width: 20px;
  height: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.menu-toggle-bars .bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.2s ease;
  transform-origin: center;
}

.menu-toggle.is-active .bar-1 {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle.is-active .bar-2 {
  opacity: 0;
  transform: scaleX(0);
}

.menu-toggle.is-active .bar-3 {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Navigation Drawer */
.mobile-navigation-drawer {
  position: fixed;
  inset-inline: 0;
  top: var(--epna-header-height, 68px);
  bottom: 0;
  height: calc(100vh - var(--epna-header-height, 68px));
  height: calc(100dvh - var(--epna-header-height, 68px));
  max-height: calc(100dvh - var(--epna-header-height, 68px));
  background-color: rgba(10, 16, 26, 0.98);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-block-start: 1px solid var(--epna-slate-border);
  z-index: 999;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-navigation-drawer.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.mobile-drawer-inner {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  min-height: 100%;
  box-sizing: border-box;
  padding: var(--epna-space-lg) var(--epna-space-xl) calc(var(--epna-space-2xl) + 24px);
  max-width: 600px;
  margin-inline: auto;
  width: 100%;
}

.mobile-drawer-nav {
  flex: 1 0 auto;
  margin-block-end: var(--epna-space-xl);
}

.mobile-nav-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.mobile-nav-links li {
  position: relative;
}

.mobile-nav-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.95rem;
  color: var(--epna-light);
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  border-block-end: 1px solid rgba(255, 255, 255, 0.08);
  transition: color var(--epna-transition-fast), padding var(--epna-transition-fast);
}

.mobile-nav-links a:hover,
.mobile-nav-links .current-menu-item > a {
  color: var(--epna-cyan);
  padding-inline-start: 0.35rem;
}

.mobile-nav-links .sub-menu {
  list-style: none;
  padding: 0;
  margin: 0;
  padding-inline-start: 1rem;
  background: rgba(255, 255, 255, 0.02);
}

.mobile-nav-links .sub-menu a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--epna-gray-muted);
  padding-block: 0.65rem;
}

.mobile-drawer-footer {
  margin-block-start: auto;
  padding-block-start: var(--epna-space-lg);
  border-block-start: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: var(--epna-space-lg);
}

.drawer-section-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--epna-gray-light);
  margin-block-end: 0.5rem;
}

.drawer-lang-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.drawer-lang-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 0.25rem;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--epna-slate-border);
  border-radius: var(--epna-radius-sm);
  color: var(--epna-light);
  text-decoration: none;
  transition: all var(--epna-transition-fast);
}

.drawer-lang-card:hover {
  border-color: #0284c7;
  color: var(--epna-cyan);
  background-color: rgba(2, 132, 199, 0.1);
}

.drawer-lang-card.is-active {
  background-color: var(--epna-cyan);
  color: var(--epna-dark);
  border-color: var(--epna-cyan);
  font-weight: 700;
}

.drawer-lang-code {
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1.2;
}

.drawer-lang-name {
  font-size: 0.7rem;
  opacity: 0.85;
  margin-block-start: 2px;
}

.drawer-cta-btn {
  width: 100%;
  padding-block: 0.85rem;
  font-size: 0.95rem;
  font-weight: 700;
  box-shadow: 0 4px 18px rgba(2, 132, 199, 0.35);
}

.mobile-drawer-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s ease, visibility 0.28s ease;
}

.mobile-drawer-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

body.mobile-menu-open {
  overflow: hidden !important;
}

/* ==========================================================================
   Breadcrumbs
   ========================================================================== */
.epna-breadcrumbs {
  padding-block: var(--epna-space-md);
  font-size: 0.875rem;
  color: var(--epna-gray-light);
  margin-block-end: var(--epna-space-xl);
}

.epna-breadcrumbs a {
  color: var(--epna-gray-light);
}

.epna-breadcrumbs a:hover {
  color: var(--epna-cyan-dark);
}

.epna-breadcrumbs .breadcrumb_last {
  color: var(--epna-cyan-dark);
  font-weight: 500;
}

.breadcrumb-separator {
  margin-inline: 0.35rem;
  color: #94a3b8;
}

/* ==========================================================================
   Semantic Industrial Footer
   ========================================================================== */
.site-footer {
  background-color: #0b1120;
  border-block-start: 1px solid var(--epna-slate-border);
  padding-block-start: var(--epna-space-3xl);
  padding-block-end: var(--epna-space-xl);
  color: var(--epna-gray-light);
  margin-block-start: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1.25fr 1.5fr;
  gap: var(--epna-space-2xl);
  margin-block-end: var(--epna-space-2xl);
}

.footer-col h3,
.footer-col .footer-title {
  color: var(--epna-white);
  font-size: 1.05rem;
  font-weight: 600;
  margin-block-end: var(--epna-space-lg);
  position: relative;
  padding-block-end: var(--epna-space-xs);
}

.footer-col h3::after,
.footer-col .footer-title::after {
  content: '';
  position: absolute;
  inset-inline-start: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  background-color: var(--epna-cyan);
}

.footer-col p {
  color: var(--epna-gray-light);
  font-size: 0.875rem;
  line-height: 1.8;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-block-end: var(--epna-space-xs);
}

.footer-links a {
  color: var(--epna-gray-light);
  font-size: 0.875rem;
  transition: color var(--epna-transition-fast),
              padding-inline-start var(--epna-transition-fast);
}

.footer-links a:hover {
  color: var(--epna-cyan);
  padding-inline-start: 4px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--epna-space-sm);
  margin-block-end: var(--epna-space-sm);
  font-size: 0.875rem;
}

.footer-contact-item svg,
.footer-contact-item .contact-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-block-start: 3px;
  color: var(--epna-cyan);
}

.footer-bottom {
  border-block-start: 1px solid var(--epna-slate-border);
  padding-block-start: var(--epna-space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--epna-space-md);
  font-size: 0.8125rem;
}

.footer-copy {
  margin: 0;
  color: var(--epna-gray);
}

.footer-menu {
  display: flex;
  gap: var(--epna-space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-menu a {
  color: var(--epna-gray);
}

.footer-menu a:hover {
  color: var(--epna-cyan);
}

/* ==========================================================================
   WordPress Core Alignments & Utility Classes
   ========================================================================== */
.alignwide {
  margin-inline: auto;
  max-width: min(100%, 1320px);
}

.alignfull {
  margin-inline: calc(50% - 50vw);
  max-width: 100vw;
  width: 100vw;
}

.aligncenter {
  margin-inline: auto;
  display: block;
}

.alignleft {
  float: inline-start;
  margin-inline-end: var(--epna-space-md);
  margin-block-end: var(--epna-space-md);
}

.alignright {
  float: inline-end;
  margin-inline-start: var(--epna-space-md);
  margin-block-end: var(--epna-space-md);
}

.wp-caption {
  margin-block-end: var(--epna-space-md);
  max-width: 100%;
}

.wp-caption-text {
  font-size: 0.8125rem;
  color: var(--epna-gray);
  margin-block-start: 0.25rem;
  text-align: center;
}

/* Pagination */
.pagination,
.posts-navigation {
  display: flex;
  justify-content: center;
  gap: var(--epna-space-xs);
  margin-block-start: var(--epna-space-2xl);
}

.page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding-inline: 0.5rem;
  border-radius: var(--epna-radius-sm);
  background-color: var(--epna-dark-surface);
  border: 1px solid var(--epna-slate-border);
  color: var(--epna-light);
  font-size: 0.875rem;
  font-weight: 500;
}

.page-numbers.current {
  background-color: var(--epna-cyan);
  color: var(--epna-dark);
  border-color: var(--epna-cyan);
  font-weight: 700;
}

.page-numbers:hover:not(.current) {
  border-color: var(--epna-cyan);
  color: var(--epna-cyan);
}

/* Back to Top Button */
.scroll-top {
  position: fixed;
  inset-inline-end: 1.5rem;
  inset-block-end: 1.5rem;
  width: 42px;
  height: 42px;
  border-radius: var(--epna-radius-sm);
  background-color: var(--epna-dark-card);
  border: 1px solid var(--epna-cyan);
  color: var(--epna-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--epna-transition-normal);
  z-index: 99;
  box-shadow: var(--epna-shadow-md);
}

.scroll-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--epna-cyan);
  color: var(--epna-dark);
  box-shadow: 0 0 15px var(--epna-cyan-glow);
  transform: translateY(-3px);
}

/* ==========================================================================
   Responsive Adaptations for Layout Elements
   ========================================================================== */
@media (max-width: 1024px) {
  :root {
    --epna-header-height: 68px;
  }

  .main-navigation {
    display: none !important;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .header-container {
    gap: var(--epna-space-md);
  }

  .header-actions {
    gap: var(--epna-space-sm);
  }

  .header-actions .header-cta {
    padding-inline: 0.75rem;
    font-size: 0.8125rem;
  }

  .epna-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-col:first-child {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .epna-grid-3,
  .epna-grid-2 {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--epna-space-xl);
  }
  
  .footer-col:first-child {
    grid-column: span 1;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .header-actions .header-cta {
    display: none !important;
  }

  .site-brand-link {
    max-width: 190px;
  }

  .site-title {
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

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

@media (max-width: 380px) {
  .site-brand-link {
    max-width: 150px;
  }

  .site-title {
    font-size: 0.85rem;
  }

  .menu-toggle {
    width: 36px;
    height: 36px;
  }
}