/* ==========================================================================
   TypesetOK — Main Layout, Header, Navigation & Responsive Utilities
   ========================================================================== */

/* --------------------------------------------------------------------------
   Container & Layout Structure
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
  box-sizing: border-box;
}

.container-editorial {
  width: 100%;
  max-width: var(--container-editorial);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
  box-sizing: border-box;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
  box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   Editorial Background
   -------------------------------------------------------------------------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(37, 99, 235, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(217, 160, 75, 0.04) 0%, transparent 50%);
  z-index: -1;
}

/* --------------------------------------------------------------------------
   Sticky Top Navigation Bar
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(11, 14, 20, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border-subtle);
  z-index: var(--z-sticky);
  transition: background-color var(--motion-normal), border-color var(--motion-normal);
}

[data-theme="light"] .site-header {
  background-color: rgba(252, 251, 249, 0.94);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-3);
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-ink-primary);
  flex-shrink: 0;
}

.brand-logo-img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: var(--font-size-base);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-ink-primary);
  letter-spacing: -0.01em;
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-ink-muted);
}

/* Primary Desktop Nav Menu */
.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav-link {
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-ink-secondary);
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--motion-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-brand-blue-hover);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-brand-blue);
  transition: width var(--motion-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

[dir="ltr"] .nav-link::after {
  right: auto;
  left: 0;
}

/* Header Controls & Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Language Switcher Dropdown/Pills */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 2px;
  gap: 2px;
}

.lang-btn {
  padding: 3px 8px;
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 700;
  border-radius: var(--radius-xs);
  color: var(--color-ink-muted);
  background: transparent;
  transition: all var(--motion-fast);
  cursor: pointer;
  min-height: 28px;
}

.lang-btn:hover {
  color: var(--color-ink-primary);
}

.lang-btn.active {
  background: var(--color-brand-blue);
  color: #FFFFFF;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-bg-subtle);
  color: var(--color-ink-secondary);
  transition: all var(--motion-fast);
  cursor: pointer;
}

.icon-btn:hover {
  background-color: var(--color-bg-elevated);
  color: var(--color-brand-blue);
  border-color: var(--color-brand-blue);
}

.icon-btn.active {
  background-color: var(--color-brand-blue-light);
  color: var(--color-brand-blue);
  border-color: var(--color-brand-blue);
}

/* Reading Progress Bar */
.scroll-progress-bar {
  position: absolute;
  bottom: 0;
  right: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-brand-blue), var(--color-accent-gold));
  z-index: 10;
  transition: width 0.05s linear;
}

[dir="ltr"] .scroll-progress-bar {
  right: auto;
  left: 0;
}

/* Mobile Hamburger Toggle */
.mobile-nav-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg-subtle);
  color: var(--color-ink-primary);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* Mobile Navigation Drawer */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background-color: var(--color-bg-paper);
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-3);
  border-top: 1px solid var(--color-border-subtle);
  z-index: var(--z-drawer);
  box-shadow: var(--shadow-floating);
  overflow-y: auto;
}

.mobile-nav-drawer.open {
  display: flex;
}

.mobile-nav-link {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-ink-primary);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-subtle);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   Editorial Badges & Chips
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  background-color: var(--color-bg-subtle);
  color: var(--color-ink-secondary);
  border: 1px solid var(--color-border-subtle);
  letter-spacing: 0.02em;
}

.badge-brand {
  background-color: var(--color-brand-blue-light);
  color: var(--color-brand-blue-hover);
  border-color: rgba(37, 99, 235, 0.3);
}

.badge-accent {
  background-color: var(--color-accent-gold-light);
  color: var(--color-accent-gold);
  border-color: rgba(217, 160, 75, 0.3);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: currentColor;
}

/* --------------------------------------------------------------------------
   Editorial Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  transition: all var(--motion-fast);
  white-space: nowrap;
  box-sizing: border-box;
}

.btn-primary {
  background-color: var(--color-brand-blue);
  color: #FFFFFF;
  border: 1px solid var(--color-brand-blue);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-brand-blue-hover);
  color: #FFFFFF;
  box-shadow: 0 4px 12px var(--color-brand-blue-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-bg-subtle);
  color: var(--color-ink-primary);
  border: 1px solid var(--color-border-medium);
  box-shadow: var(--shadow-subtle);
}

.btn-secondary:hover {
  background-color: var(--color-bg-elevated);
  border-color: var(--color-brand-blue);
  color: var(--color-brand-blue);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-ink-secondary);
  border: 1px solid var(--color-border-medium);
}

.btn-outline:hover {
  background: var(--color-brand-blue-light);
  color: var(--color-brand-blue);
  border-color: var(--color-brand-blue);
}

.btn-ghost {
  background: transparent;
  color: var(--color-ink-secondary);
}

.btn-ghost:hover {
  background: var(--color-bg-subtle);
  color: var(--color-ink-primary);
}

.btn-lg {
  padding: 14px 24px;
  font-size: var(--font-size-base);
  border-radius: var(--radius-md);
}

.btn-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* --------------------------------------------------------------------------
   Editorial Section Layout & Headers
   -------------------------------------------------------------------------- */
.editorial-section {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
  position: relative;
  border-bottom: 1px solid var(--color-border-subtle);
}

.section-lead-header {
  margin-bottom: var(--space-12);
  text-align: center;
}

.section-pretitle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--color-accent-gold);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-ink-primary);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-ink-secondary);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  line-height: var(--line-height-snug);
}

/* --------------------------------------------------------------------------
   Paper Sheet Container (Editorial Document Aesthetic)
   -------------------------------------------------------------------------- */
.paper-sheet {
  background-color: var(--color-bg-paper);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-paper);
  position: relative;
  overflow: hidden;
}

.paper-sheet-crops::before,
.paper-sheet-crops::after {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  pointer-events: none;
  z-index: 10;
}

.paper-sheet-crops::before {
  top: 8px;
  right: 8px;
  border-top: 1.5px solid var(--color-ink-faint);
  border-right: 1.5px solid var(--color-ink-faint);
}

.paper-sheet-crops::after {
  bottom: 8px;
  left: 8px;
  border-bottom: 1.5px solid var(--color-ink-faint);
  border-left: 1.5px solid var(--color-ink-faint);
}

[dir="ltr"] .paper-sheet-crops::before {
  right: auto;
  left: 8px;
  border-right: none;
  border-left: 1.5px solid var(--color-ink-faint);
}

[dir="ltr"] .paper-sheet-crops::after {
  left: auto;
  right: 8px;
  border-left: none;
  border-right: 1.5px solid var(--color-ink-faint);
}

/* --------------------------------------------------------------------------
   Responsive Rules for Main & Header
   -------------------------------------------------------------------------- */
@media (max-width: 980px) {
  .primary-nav {
    display: none;
  }
  
  .mobile-nav-toggle {
    display: inline-flex;
  }

  .editorial-section {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }
  
  .section-lead-header {
    margin-bottom: var(--space-8);
  }
}

@media (max-width: 600px) {
  .container,
  .container-editorial,
  .container-narrow {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .site-header {
    height: 60px;
  }

  .brand-logo-img {
    width: 32px;
    height: 32px;
  }

  .brand-name {
    font-size: 15px;
  }

  .brand-tagline {
    display: none;
  }

  .editorial-section {
    padding-top: var(--space-10);
    padding-bottom: var(--space-10);
  }

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

  .btn-group {
    flex-direction: column;
    width: 100%;
  }
}