:root {
  /* Vieta Space Brand Colors */
  --brand-primary: #405d63;
  --brand-primary-rgb: 64, 93, 99;
  --brand-secondary: #55747c;
  --brand-tertiary: #759ea4;
  --brand-light: #99b2b3;
  --brand-lightest: #a7c2c8;

  /* Background colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #f1f3f5;
  --bg-hover: #f0f0f0;

  /* Border colors */
  --border-color: #dee2e6;
  --border-light: #e9ecef;

  /* Text colors */
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-tertiary: #adb5bd;

  /* Interactive states */
  --hover-bg: rgba(64, 93, 99, 0.1);
  --active-bg: rgba(64, 93, 99, 0.15);

  /* Shadow system */
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 0 8px rgba(0, 0, 0, 0.1);
  --shadow-medium-strong: 0 0 8px rgba(0, 0, 0, 0.25);
  --shadow-large: 0 4px 20px rgba(0, 0, 0, 0.12);

  /* Layout */
  --navbar-height: 60px;
  --sidebar-width: 280px;
  --footer-height: 120px;

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
}

/* Responsive footer height */
@media (max-width: 768px) {
  :root {
    --footer-height: 160px;
  }
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-base);
  line-height: 1.5;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-size: var(--font-size-base);
}

/* Utility classes */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.navbar {
  height: var(--navbar-height);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

.navbar-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  margin: 0 auto;
}

.navbar-top {
  padding: 0 var(--spacing-lg);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--navbar-height);
  position: relative;
  background-color: var(--brand-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 2;
}

.navbar-main-links {
  display: flex;
  align-items: center;
}

.navbar-main-links button {
  font-size: inherit;
}

.navbar-main-links .nav-list {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar-main-links .nav-link {
  color: white;
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.navbar-main-links .nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.navbar-top .navbar-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-left: auto;
  list-style: none;
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown ul {
  list-style: none;
}

.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  font: inherit;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.nav-dropdown-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-dropdown-icon {
  display: inline-block;
  transition: transform 0.25s ease;
}

.nav-dropdown-toggle[aria-expanded="true"] .nav-dropdown-icon {
  transform: rotate(180deg);
}

/* Dropdown menu base */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 0.4em);
  right: 0;
  min-width: 180px;
  background-color: white;
  box-shadow: var(--shadow-medium-strong);
  border-radius: 0.4em;
  z-index: 1000;
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

/* Visible state */
.dropdown-menu.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.dropdown-item {
  display: block;
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.dropdown-item:hover {
  background-color: var(--bg-hover);
}

.navbar-brand {
  display: flex;
  align-items: center;
}

.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: white;
}

.brand-logo {
  height: 40px;
  width: auto;
  filter: brightness(0) invert(1);
}

/* Hamburger menu */
.navbar-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.navbar-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: white;
  margin: 4px 0;
  transition: 0.3s;
  transform-origin: center;
}

.navbar-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(4.5px, 5px);
}

.navbar-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(3.5px, -4px);
}

/* Navigation */
.navbar-nav {
  display: none;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: 0;
}

.nav-item > a {
  display: block;
}

.navbar-nav .nav-link {
  color: white;
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  transition: background-color 0.2s ease;
  font-weight: 400;
}

.navbar-nav .nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
}

/* Main layout */
.content-container {
  overflow: clip;
  margin-top: var(--navbar-height);
  height: calc(100vh - var(--navbar-height));
}

.container.wiki {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0;
}

.row {
  display: flex;
  min-height: calc(100vh - var(--navbar-height));
}

.col-sidebar {
  width: var(--sidebar-width);
  margin-left: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-medium);
  overflow-y: auto;
}

.col-main {
  flex: 1;
  margin: var(--spacing-xl);
  background-color: var(--bg-secondary);
}

/* Sidebar navigation */
.sidebar-nav {
  padding: var(--spacing-lg);
}

.nav-content {
  /* Container for navigation content */
}

.nav-section {
  list-style: none;
  margin-bottom: var(--spacing-lg);
}

.nav-heading {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--brand-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 var(--spacing-sm) 0;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.nav-heading:first-child {
  margin-top: 0;
}

.sidebar-nav .nav-section {
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
}

.sidebar-nav .nav-section:last-child {
  border-bottom: none;
}

.sidebar-nav .nav-link {
  display: block;
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  margin: 2px 0;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.sidebar-nav .nav-link:hover:not(.nav-link--active) {
  background-color: var(--hover-bg);
  color: var(--brand-primary);
}

.sidebar-nav .nav-link--active {
  background-color: var(--brand-primary);
  color: #fff;
  font-weight: 500;
}

/* Disabled link styling */
.sidebar-nav .nav-link--disabled {
  color: var(--text-tertiary);
  cursor: not-allowed;
  background: none !important;
}

/* Nested sidebar subsections */
.nav-subsection {
  list-style: none;
  margin: 0.25rem 0 0.5rem 0;
  padding-left: var(--spacing-md); /* indent from parent */
}

.nav-sublink {
  display: block;
  padding: var(--spacing-xs) var(--spacing-md);
  margin: 2px 0;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-sublink:hover {
  background-color: var(--hover-bg);
  color: var(--brand-secondary);
}

.nav-sublink--active,
.nav-sublink--active:hover {
  background-color: var(--brand-light);
  color: #fff;
  font-weight: 500;
}

.nav-subsection.collapsed { display: none; }
.nav-subsection.expanded { display: block; }

.navbar-nav .nav-link--disabled {
  color: var(--text-tertiary);
  cursor: not-allowed;
}

.navbar-nav .nav-link--disabled:hover {
  background-color: transparent;
  color: var(--text-tertiary);
}

.navbar-nav .nav-link--active {
  background-color: var(--active-bg);
  color: var(--brand-primary);
  font-weight: 500;
}

.navbar-nav .nav-link--active:hover {
  background-color: var(--active-bg);
  color: var(--brand-primary);
}

.content-page {
  overflow-y: scroll;
  height: calc(100vh - var(--footer-height));
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-medium);
}

/* Keyboard keys */
kbd {
  display: inline-block;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.45em;
  margin: 0 0.1em;
  font-family: 'Menlo', 'Consolas', 'Courier New', monospace;
  font-size: 0.9em;
  line-height: 1.2;
  color: var(--text-primary);
  box-shadow: inset 0 -1px 0 var(--border-light);
}

/* For grouped key combinations like Ctrl + Shift + Z */
kbd + kbd {
  margin-left: 0.2em;
}

/* Placeholder squares */
.wiki-content strong:has(> .placeholder),
.placeholder {
  font-weight: 600;
  color: var(--brand-primary);
}

.placeholder--selection {
  background-color: rgba(64, 93, 99, 0.2); /* brand primary tint */
  color: var(--brand-primary);
}

.placeholder--slot {
  background-color: rgba(0, 0, 0, 0.05);
  color: var(--text-secondary);
}

/* MathML elements */
math {
  vertical-align: middle;
  margin: 0 0.15em;
  font-size: 1.05em;
}

math mi, math mo, math mn, math mtext {
  color: var(--text-primary);
}

/* Fraction and root examples slightly larger for clarity */
.wiki-content math mfrac,
.wiki-content math msqrt,
.wiki-content math mroot {
  font-size: 1.05em;
}

.wiki-container {
  /* Container for wiki content */
}

/* Search section */
.wiki-search {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.search-form {
}

.search-group {
  position: relative;
}

.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: var(--spacing-md);
  color: var(--text-secondary);
  z-index: 2;
}

.search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 2.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  background-color: var(--bg-primary);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 2px rgba(64, 93, 99, 0.1);
}

.search-clear {
  position: absolute;
  right: var(--spacing-md);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
}

.search-clear:hover {
  background-color: var(--bg-hover);
}

/* Search results */
.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-medium);
  z-index: 10;
  max-height: 400px;
  overflow-y: auto;
}

.search-results-content {
  padding: var(--spacing-md);
}

.search-results-header {
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--spacing-sm);
}

.search-results-count {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.search-results-list {
  /* Container for search results */
}

.search-result-item {
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-xs);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.search-result-item:hover {
  background-color: var(--bg-hover);
}

.search-result-title {
  font-weight: 500;
  color: var(--brand-primary);
  margin-bottom: var(--spacing-xs);
}

.search-result-excerpt {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.4;
}

.search-highlight {
  background-color: rgba(64, 93, 99, 0.2);
  padding: 1px 2px;
  border-radius: 2px;
}

/* Main wiki content */
.wiki-main {
  padding: var(--spacing-xl);
}

.page-header {
  margin-bottom: var(--spacing-xl);
}

.page-header h1 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: var(--spacing-md);
}

.wiki-content {
}

.wiki-content p {
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
  color: var(--text-primary);
}

.wiki-content h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--brand-primary);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.section-heading {
  /* Wrapper for section headings */
}

.article-list {
  list-style: none;
  margin-bottom: var(--spacing-xl);
}

.article-list li {
  margin-bottom: var(--spacing-sm);
}

.article-link {
  color: var(--brand-primary);
  text-decoration: none;
  font-weight: 500;
}

.article-link:hover {
  text-decoration: underline;
}

.coming-soon {
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
  font-style: italic;
  margin-left: var(--spacing-sm);
}

.contact-link {
  color: var(--brand-primary);
  text-decoration: none;
  font-weight: 500;
}

.contact-link:hover {
  text-decoration: underline;
}

/* Card layout for main page */
.docs-sections {
  margin-bottom: var(--spacing-2xl);
}

.docs-section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.docs-section-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all 0.2s ease;
  box-shadow: var(--shadow-subtle);
}

.docs-section-card:hover {
  box-shadow: var(--shadow-medium);
  border-color: var(--brand-light);
}

.docs-section-card h2 {
  margin-top: 0;
}

.product-item {
  display: flex;
  flex-direction: column;
}

.docs-section-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--brand-primary);
  margin-bottom: var(--spacing-sm);
}

.docs-section-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.docs-section-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.docs-section-link {
  color: var(--brand-primary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--brand-primary);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  font-size: var(--font-size-sm);
  text-align: center;
  display: inline-block;
}

.docs-link-note {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: 0.25rem;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.docs-section-link:hover {
  background-color: var(--brand-primary);
  color: white;
}

.docs-section-link--disabled {
  color: var(--text-tertiary);
  border-color: var(--border-color);
  cursor: not-allowed;
}

.docs-section-link--disabled:hover {
  background-color: transparent;
  color: var(--text-tertiary);
  border-color: var(--border-color);
}

/* Contact section */
.docs-contact {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  box-shadow: var(--shadow-subtle);
}

.docs-contact h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--brand-primary);
  margin-bottom: var(--spacing-md);
}

.docs-contact p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Footer */
.docs-footer {
  height: var(--footer-height);
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xl) 0;
  margin-top: auto;
  position: relative;
}

.docs-footer-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.docs-footer-info {
  flex: 1;
}

.docs-footer-text {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-xs);
}

.docs-footer-links {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.docs-footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color 0.2s ease;
}

.docs-footer-link:hover {
  color: var(--brand-primary);
}

/* Legal document styling */
.wiki-content h1 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: var(--spacing-lg);
}

.wiki-content h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.wiki-content ul, .wiki-content ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.wiki-content li {
  margin-bottom: var(--spacing-xs);
  line-height: 1.6;
}

.wiki-content a {
  color: var(--brand-primary);
  text-decoration: none;
}

.wiki-content a:hover {
  text-decoration: underline;
}

.wiki-content strong {
  font-weight: 600;
  color: var(--text-primary);
}

.wiki-content em {
  font-style: italic;
  color: var(--text-secondary);
}

.wiki-content hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: var(--spacing-xl) 0;
}

/* Responsive design */
@media (max-width: 768px) {
  .navbar-toggle {
    display: block;
  }

  .navbar-main-links {
    display: none;
  }

  .docs-products-grid {
    grid-template-columns: 1fr;
  }

  .navbar-top .nav-dropdown {
    display: none;
  }
  
  .navbar-nav {
    position: absolute;
    display: flex;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background-color: var(--brand-primary);
    z-index: 1; /* below the top row */
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }
  
  .navbar-nav.show {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-list {
    flex-direction: column;
    width: 100%;
  }
  
  .col-sidebar {
    display: none;
  }
  
  .content-page {
    margin: var(--spacing-md);
  }
  
  .wiki-search {
    padding: var(--spacing-md);
  }
  
  .wiki-main {
    padding: var(--spacing-lg);
  }
  
  .page-header h1 {
    font-size: var(--font-size-2xl);
  }
  
  .docs-footer-content {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .navbar-container {
  }

  .col-main {
    margin: 0;
  }

  .content-container {
    height: auto;
  }
  
  .content-page {
    margin: var(--spacing-sm);
    font-size: 0.9em;
    height: auto;
  }
  
  .wiki-search {
    padding: var(--spacing-sm);
  }
  
  .wiki-main {
    padding: var(--spacing-md);
  }
}

/* View transitions */
@view-transition {
  navigation: auto;
}

/* Legal document styling */
.effective-date {
  font-style: italic;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bg-tertiary);
  border-left: 3px solid var(--brand-primary);
  border-radius: var(--radius-md);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}