/* ================================
   CSS Variables - Design System
   ================================ */
:root {
  --color-primary: #4CAF50;
  --color-light: #B9E4BB;
  --color-dark: #193A1B;
  --color-text: #333333;
  --color-bg: #FFFFFF;
  --color-border: #e0e0e0;
  
  --font-heading: 'DM Serif Display', serif;
  --font-body: 'DM Sans', sans-serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  --container-width: 1200px;
  --content-width: 800px;
}

/* ================================
   Reset & Base Styles
   ================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  line-height: 1.6;
}

body {
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  color: var(--color-dark);
  line-height: 1.3;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.5rem;
  margin-top: 0;
}

h2 {
  font-size: 2rem;
  border-bottom: 2px solid var(--color-light);
  padding-bottom: var(--spacing-xs);
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-dark);
  text-decoration: underline;
}

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

li {
  margin-bottom: var(--spacing-xs);
}

code {
  background: var(--color-light);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
  font-family: 'Monaco', 'Courier New', monospace;
}

pre {
  background: var(--color-light);
  padding: var(--spacing-md);
  border-radius: 5px;
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

pre code {
  background: none;
  padding: 0;
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-md);
  margin-left: 0;
  margin-bottom: var(--spacing-md);
  font-style: italic;
  color: #555;
}

/* ================================
   Layout Components
   ================================ */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.main-content {
  flex: 1;
  padding: var(--spacing-lg) 0;
}

.content {
  max-width: var(--content-width);
}

/* ================================
   Header
   ================================ */
.site-header {
  background: var(--color-dark);
  color: var(--color-bg);
  padding: var(--spacing-lg) 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.site-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-bg);
  text-decoration: none;
  display: block;
  margin-bottom: var(--spacing-xs);
}

.site-title:hover {
  color: var(--color-light);
  text-decoration: none;
}

.site-tagline {
  color: var(--color-light);
  font-size: 1rem;
  margin: 0;
}

/* ================================
   Navigation
   ================================ */
.main-nav {
  background: var(--color-primary);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-bg);
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-link:hover {
  background: var(--color-light);
  color: var(--color-dark);
  text-decoration: none;
}

.sub-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-bg);
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  min-width: 200px;
  list-style: none;
  margin: 0;
  padding: var(--spacing-xs) 0;
  z-index: 1000;
}

.nav-item.has-children:hover .sub-nav {
  display: block;
}

.sub-nav li {
  margin: 0;
}

.sub-nav a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--color-text);
  text-decoration: none;
}

.sub-nav a:hover {
  background: var(--color-light);
  color: var(--color-dark);
  text-decoration: none;
}

/* Third level navigation */
.sub-nav li.has-children {
  position: relative;
}

.sub-nav li.has-children > a::after {
  content: ' \25B6';
  font-size: 0.7em;
  margin-left: 0.5em;
}

.sub-sub-nav {
  display: none;
  position: absolute;
  top: 0;
  left: 100%;
  background: var(--color-bg);
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  min-width: 220px;
  list-style: none;
  margin: 0;
  padding: var(--spacing-xs) 0;
  z-index: 1001;
}

.sub-nav li.has-children:hover > .sub-sub-nav {
  display: block;
}

.sub-sub-nav li {
  margin: 0;
}

.sub-sub-nav a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
}

.sub-sub-nav a:hover {
  background: var(--color-light);
  color: var(--color-dark);
  text-decoration: none;
}

/* ================================
   Breadcrumbs
   ================================ */
.breadcrumbs {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  font-size: 0.9rem;
}

.breadcrumb-list li {
  margin: 0;
}

.breadcrumb-list li::after {
  content: '/';
  margin-left: var(--spacing-xs);
  color: #999;
}

.breadcrumb-list li:last-child::after {
  content: '';
}

.breadcrumb-list a {
  color: var(--color-primary);
}

.breadcrumb-list li[aria-current="page"] {
  color: #666;
}

/* ================================
   Page Title
   ================================ */
.page-title {
  color: var(--color-dark);
  border-bottom: 3px solid var(--color-primary);
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

/* ================================
   Project Layout (with sidebar)
   ================================ */
.project-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: var(--spacing-xl);
  max-width: var(--container-width);
}

.project-sidebar {
  background: #f9f9f9;
  padding: var(--spacing-md);
  border-radius: 5px;
  border: 1px solid var(--color-border);
  align-self: start;
  position: sticky;
  top: var(--spacing-md);
}

.project-sidebar h3 {
  font-size: 1.1rem;
  margin-top: 0;
  color: var(--color-dark);
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: var(--spacing-xs);
}

.sidebar-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar-nav li {
  margin-bottom: var(--spacing-xs);
}

.sidebar-nav a {
  display: block;
  padding: var(--spacing-xs);
  color: var(--color-text);
  border-left: 3px solid transparent;
  transition: all 0.2s ease;
}

.sidebar-nav a:hover {
  border-left-color: var(--color-primary);
  background: var(--color-bg);
  text-decoration: none;
}

.project-content {
  min-width: 0;
}

/* ================================
   Footer
   ================================ */
.site-footer {
  background: var(--color-dark);
  color: var(--color-light);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-xl);
}

.site-footer p {
  margin-bottom: var(--spacing-sm);
}

.footer-note {
  font-size: 0.9rem;
  color: var(--color-light);
  opacity: 0.8;
}

/* ================================
   Tables
   ================================ */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-md);
}

th, td {
  padding: var(--spacing-sm);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  background: var(--color-light);
  color: var(--color-dark);
  font-weight: 700;
}

tr:hover {
  background: #f9f9f9;
}

/* ================================
   Coming Soon Page
   ================================ */
.coming-soon {
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.coming-soon-icon {
  font-size: 4rem;
  color: var(--color-light);
  margin-bottom: var(--spacing-md);
}

/* ================================
   Document Category Badges
   ================================ */
.doc-category-badge {
  display: inline-block;
  padding: 0.25em 0.75em;
  border-radius: 3px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.doc-category-badge.raw-data {
  background: #e3f2fd;
  color: #1565c0;
  border: 1px solid #90caf9;
}

.doc-category-badge.deliverable {
  background: #e8f5e9;
  color: #2e7d32;
  border: 1px solid #a5d6a7;
}

/* ================================
   Raw Data Page Styles
   ================================ */
.raw-data-page {
  max-width: 100%;
}

.raw-data-header {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.raw-data-notice {
  margin-top: var(--spacing-sm);
  color: #666;
  font-style: italic;
}

.raw-data-code {
  background: #1e1e1e;
  color: #d4d4d4;
  padding: var(--spacing-lg);
  border-radius: 5px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
  max-height: 80vh;
  overflow-y: auto;
}

.raw-data-code code {
  background: none;
  color: inherit;
  padding: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ================================
   Deliverable Page Styles
   ================================ */
.deliverable-page {
  max-width: var(--content-width);
}

.deliverable-header {
  margin-bottom: var(--spacing-md);
}

.deliverable-meta {
  background: var(--color-light);
  padding: var(--spacing-md);
  border-radius: 5px;
  margin-bottom: var(--spacing-lg);
}

.deliverable-description {
  margin-bottom: 0;
}

/* ================================
   Navigation Toggle Buttons
   ================================ */
.nav-toggle,
.sub-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
}

.nav-toggle-icon {
  display: block;
  width: 10px;
  height: 10px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.is-expanded > .nav-toggle .nav-toggle-icon,
.is-expanded > .sub-nav-toggle .nav-toggle-icon {
  transform: rotate(-135deg);
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 768px) {
  .nav-list {
    flex-direction: column;
  }

  .nav-item {
    position: relative;
  }

  .nav-item.has-children {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
  }

  .nav-item.has-children > .nav-link {
    flex: 1;
  }

  /* Show toggle buttons on mobile */
  .nav-toggle,
  .sub-nav-toggle {
    display: block;
    position: static;
    transform: none;
    color: var(--color-bg);
    padding: var(--spacing-md);
  }

  .sub-nav-toggle {
    color: var(--color-text);
    padding: var(--spacing-sm) var(--spacing-md);
  }

  /* Hide submenus by default on mobile */
  .nav-item.has-children .sub-nav {
    display: none;
    position: static;
    width: 100%;
    box-shadow: none;
    background: rgba(0,0,0,0.1);
  }

  /* Show submenus when expanded */
  .nav-item.has-children.is-expanded > .sub-nav {
    display: block;
  }

  .sub-nav li {
    position: relative;
  }

  .sub-nav li.has-children {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
  }

  .sub-nav li.has-children > a {
    flex: 1;
  }

  /* Third level navigation on mobile */
  .sub-nav-nested {
    display: none;
    width: 100%;
    position: static;
    box-shadow: none;
    background: rgba(0,0,0,0.05);
    padding-left: var(--spacing-md);
  }

  .sub-nav li.has-children.is-expanded > .sub-nav-nested {
    display: block;
  }

  /* Remove hover arrow indicator on mobile */
  .sub-nav li.has-children > a::after {
    display: none;
  }

  .project-layout {
    grid-template-columns: 1fr;
  }

  .project-sidebar {
    position: static;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
  }
  
  .site-title {
    font-size: 1.5rem;
  }
  
  h1 {
    font-size: 1.75rem;
  }
}