/*
 * AXIOMHOST.NG NAVIGATION STANDARDIZED CSS
 * Global navigation, breadcrumbs, and layout system
 */

:root {
  /* Navigation Colors */
  --nav-bg: #ffffff;
  --nav-border: #e2e8f0;
  --nav-text-primary: #1a1a2a;
  --nav-text-secondary: #475569;
  --nav-text-muted: #64748b;
  --nav-accent: #3b82f6;
  --nav-accent-hover: #6366f1;
  
  /* Dropdown Colors */
  --dropdown-bg: #ffffff;
  --dropdown-border: #e2e8f0;
  --dropdown-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --dropdown-shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.12);
  
  /* Breadcrumb Colors */
  --breadcrumb-text: #64748b;
  --breadcrumb-active: #3b82f6;
  --breadcrumb-separator: #cbd5e1;
  
  /* Content Wrapper */
  --content-wrapper-bg: #ffffff;
  --content-max-width: 820px;
  
  /* Sidebar Colors */
  --sidebar-bg: #f8fafc;
  --sidebar-border: #e2e8f0;
  --sidebar-heading: #1a1a2a;
  
  /* Page Navigation */
  --page-nav-bg: #f8fafc;
  --page-nav-border: #e2e8f0;
  --page-nav-text: #64748b;
  
  /* Footer Colors */
  --footer-bg: #0f172a;
  --footer-text: #94a3b8;
  --footer-link: #cbd5e1;
  --footer-link-hover: #e2e8f0;
}

/* ==========================================================================
   GLOBAL HEADER COMPONENT
   ========================================================================== */

.site-header {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* Navigation Container */
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 16px;
}

/* Site Identity */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-link {
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--nav-text-primary);
  margin: 0;
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.875rem;
  color: var(--nav-text-muted);
  font-weight: 400;
  margin: 0;
  line-height: 1.3;
}

/* Primary Navigation */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  color: var(--nav-text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

.nav-link-primary {
  color: var(--nav-text-primary);
  background: var(--nav-accent);
  font-weight: 600;
}

.nav-link-primary:hover {
  background: var(--nav-accent-hover);
}

.nav-link-text {
  display: inline;
}

.nav-link-arrow {
  font-size: 0.75rem;
  margin-left: 4px;
}

/* Dropdown Navigation */
.nav-dropdown {
  position: relative;
  display: inline-block;
}

.nav-link-dropdown {
  padding: 10px 16px;
  border-radius: 6px;
}

.nav-link-dropdown::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 4px solid var(--nav-border);
  border-top: 4px solid var(--nav-border);
  transition: border 0.2s ease;
  transform: rotate(45deg);
  display: inline-block;
  margin-left: 8px;
}

.nav-link-dropdown[aria-expanded="true"]::after {
  transform: rotate(-135deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--dropdown-bg);
  border: 1px solid var(--dropdown-border);
  border-radius: 8px;
  box-shadow: var(--dropdown-shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: 200;
  padding: 8px 0;
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  box-shadow: var(--dropdown-shadow-hover);
}

.nav-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  box-shadow: var(--dropdown-shadow-hover);
}

.dropdown-link {
  display: block;
  padding: 8px 12px;
  color: var(--nav-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  border-radius: 4px;
  transition: color 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.dropdown-link:hover {
  color: var(--nav-text-primary);
  background: var(--sidebar-bg);
}

/* ==========================================================================
   BREADCRUMB NAVIGATION
   ========================================================================== */

.content-breadcrumbs {
  padding: 24px 0;
  border-bottom: 1px solid var(--nav-border);
}

.breadcrumb {
  display: flex;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
}

.breadcrumb-link {
  color: var(--breadcrumb-text);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 8px 12px;
  border-radius: 4px;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb-link:hover {
  color: var(--breadcrumb-active);
  text-decoration: underline;
}

.breadcrumb-text {
  font-weight: 500;
}

.breadcrumb-item.active .breadcrumb-link,
.breadcrumb-item.active .breadcrumb-text {
  color: var(--breadcrumb-active);
  font-weight: 600;
}

/* ==========================================================================
   CONTENT WRAPPER
   ========================================================================== */

.content-wrapper {
  background: var(--content-wrapper-bg);
  min-height: calc(100vh - 200px);
  display: flex;
  flex-direction: column;
}

.content-breadcrumbs {
  padding: 0;
}

.content-main {
  flex: 1;
}

.content-container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 48px 24px;
  line-height: 1.75;
}

/* ==========================================================================
   SIDEBAR - RELATED TOPICS
   ========================================================================== */

.content-sidebar {
  background: var(--sidebar-bg);
  border-left: 1px solid var(--sidebar-border);
  padding: 24px;
  order: 1;
}

.sidebar-section {
  margin-bottom: 32px;
}

.sidebar-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--sidebar-heading);
  margin: 0 0 16px 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-link {
  color: var(--page-nav-text);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 8px 0;
  border-left: 2px solid var(--nav-border);
  transition: color 0.2s ease, border-color 0.2s ease;
  display: block;
}

.sidebar-link:hover {
  color: var(--nav-text-primary);
  border-left-color: var(--nav-accent);
  transform: translateX(4px);
}

/* ==========================================================================
   PAGE NAVIGATION
   ========================================================================== */

.content-nav-footer {
  border-top: 1px solid var(--nav-border);
  padding: 24px 0;
  margin-top: 48px;
  background: var(--page-nav-bg);
}

.page-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.page-nav-link {
  color: var(--page-nav-text);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 12px 20px;
  border: 1px solid var(--nav-border);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.page-nav-link:hover {
  color: var(--nav-text-primary);
  background: var(--nav-bg);
  border-color: var(--nav-accent);
  transform: translateY(-2px);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.1);
}

.page-nav-prev:focus,
.page-nav-next:focus {
  outline: 2px solid var(--nav-accent);
  outline-offset: 2px;
}

.nav-icon {
  font-size: 1rem;
  color: var(--nav-text-muted);
}

.nav-text {
  font-weight: 500;
}

/* ==========================================================================
   GLOBAL FOOTER COMPONENT
   ========================================================================== */

.site-footer {
  background: var(--footer-bg);
  border-top: 4px solid var(--nav-accent);
  padding: 48px 0;
  margin-top: auto;
}

.footer-content {
  max-width: var(--content-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.footer-disclaimer {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--footer-text);
  margin: 0;
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-link {
  color: var(--footer-link);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--footer-link-hover);
  text-decoration: underline;
}

.footer-copyright {
  text-align: center;
  font-size: 0.875rem;
  color: var(--footer-text);
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 1024px) {
  .nav-container {
    padding: 0 16px;
  }
  
  .nav-menu {
    gap: 6px;
  }
  
  .nav-link {
    padding: 8px 12px;
    font-size: 0.875rem;
  }
  
  .dropdown-menu {
    min-width: 180px;
  }
}

@media (max-width: 768px) {
  .nav-container {
    padding: 0 12px;
    height: auto;
    min-height: 64px;
  }
  
  .nav-menu {
    gap: 4px;
    flex-wrap: wrap;
  }
  
  .nav-link {
    font-size: 0.8125rem;
  padding: 6px 10px;
  }
  
  .nav-link-text,
  .breadcrumb-text {
    display: none;
  }
  
  .nav-link-arrow,
  .nav-icon {
    margin: 0;
  }
  
  /* Hide dropdowns on mobile - use alternative navigation */
  .dropdown-menu {
    display: none;
  }
  
  .nav-dropdown::after {
    display: none;
  }
  
  .content-sidebar {
    order: 0;
    border-left: none;
    border-right: 1px solid var(--nav-border);
    margin: 0 0 24px;
    padding: 24px 0;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 12px;
  }
  
  .page-nav {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .content-container {
    padding: 32px 16px;
  }
  
  .site-header {
    padding: 12px 0;
  }
  
  .nav-brand {
    gap: 8px;
  }
  
  .brand-name {
    font-size: 1rem;
  }
  
  .brand-subtitle {
    font-size: 0.8125rem;
  }
  
  .footer-content {
    padding: 32px 16px;
  }
  
  .footer-disclaimer {
    font-size: 0.8125rem;
  }
  
  .page-nav-link {
    width: 100%;
    justify-content: center;
  }
}

/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--nav-accent);
  color: #ffffff;
  padding: 12px 24px;
  font-weight: 600;
  text-decoration: none;
  z-index: 1000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

/* Focus States */
a:focus-visible,
button:focus-visible,
.nav-link:focus {
  outline: 2px solid var(--nav-accent);
  outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .dropdown-menu {
    transition: none;
  }
  
  .nav-link,
  .dropdown-link,
  .page-nav-link,
  .footer-link,
  .sidebar-link {
    transition: none;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --nav-border: #1a1a2a;
    --nav-text-secondary: #1a1a2a;
    --breadcrumb-separator: #475569;
  }
  
  .nav-link,
  .page-nav-link {
    border-width: 2px;
  }
}