/* Civilization Systems Model Knowledge Base - Main Styles */

:root {
  /* Color scheme based on the diagram's color palette */
  --color-transform: #e1d5e7; /* Transformation drivers */
  --color-transform-light: #f4eef7;
  --color-transform-dark: #9673a6;
  
  --color-properties: #f5f5f5; /* System properties */
  --color-properties-light: #ffffff;
  --color-properties-dark: #666666;
  
  --color-applications: #ffe6cc; /* Analytical applications */
  --color-applications-light: #fff5e6;
  --color-applications-dark: #d79b00;
  
  --color-text: #333333;
  --color-background: #ffffff;
  --color-link: #0066cc;
  --color-link-hover: #004080;
  
  /* Accent colors for different subcategories */
  --color-accent-1: #f8cecc;
  --color-accent-2: #dae8fc;
  --color-accent-3: #d5e8d4;
  --color-accent-4: #fff2cc;
  
  /* Typography */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2.5rem;
  
  /* Container widths */
  --width-content: 800px;
  --width-full: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-background);
  line-height: 1.6;
  display: grid;
  grid-template-columns: 420px 1fr; /* Increased from 280px to 420px (1.5x) */
  min-height: 100vh;
  width: 100%;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
  line-height: 1.3;
}

h1 {
  font-size: 2.5rem;
  margin-top: var(--spacing-xl);
  color: var(--color-text);
  border-bottom: 3px solid var(--color-text);
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 1.8rem;
  margin-top: var(--spacing-xl);
  border-bottom: 1px solid #ddd;
  padding-bottom: var(--spacing-xs);
}

h3 {
  font-size: 1.5rem;
  margin-top: var(--spacing-lg);
}

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

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

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

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

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

img {
  max-width: 100%;
  height: auto;
}

/* Layout Components */
.sidebar {
  background-color: #f8f8f8;
  border-right: 1px solid #ddd;
  padding: var(--spacing-md);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

main {
  padding: var(--spacing-md) var(--spacing-xl);
  max-width: var(--width-full);
  overflow-x: hidden;
  width: 100%;
  justify-self: start;
}

.breadcrumbs {
  margin-bottom: var(--spacing-md);
  font-size: 0.9rem;
  color: #777;
}

.summary {
  font-size: 1.2rem;
  line-height: 1.5;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--color-properties-light);
  border-left: 4px solid var(--color-text);
  border-radius: 0 4px 4px 0;
}

.summary p {
  font-style: italic;
}

/* Navigation */
.sidebar-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid #ddd;
  font-weight: 600;
}

.sidebar-title a {
  color: #000;
  text-decoration: none;
}

.nav-section {
  margin-bottom: var(--spacing-md);
}

.nav-section-title {
  display: block;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

.nav-section-title a {
  color: #000;
  text-decoration: none;
}

.nav-links {
  list-style: none;
  margin-left: var(--spacing-md);
  margin-bottom: 0;
}

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

.nav-links a {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.nav-links a:hover {
  background-color: rgba(0,0,0,0.05);
  text-decoration: none;
}

.nav-links a.active {
  font-weight: 600;
  background-color: rgba(0,0,0,0.05);
}

/* Content Sections */
section {
  margin-bottom: var(--spacing-xl);
}

.section-intro {
  margin-bottom: var(--spacing-lg);
}

/* Card Grids */
.era-grid, .concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.era-card, .concept-card {
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: var(--spacing-md);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.era-card:hover, .concept-card:hover {
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  transform: translateY(-2px);
}

.era-card h3, .concept-card h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  font-size: 1.3rem;
}

/* Category styling */
.transform-bg {
  background-color: var(--color-transform-light);
}

.properties-bg {
  background-color: var(--color-properties-light);
}

.applications-bg {
  background-color: var(--color-applications-light);
}

.transform-border {
  border-color: var(--color-transform-dark);
}

.properties-border {
  border-color: var(--color-properties-dark);
}

.applications-border {
  border-color: var(--color-applications-dark);
}

/* Related Concepts Section */
.related-concepts {
  background-color: #f9f9f9;
  padding: var(--spacing-md);
  border-radius: 8px;
  margin-top: var(--spacing-xl);
}

.concept-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  list-style: none;
  margin-left: 0;
}

.concept-links li a {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: #f0f0f0;
  border-radius: 4px;
  font-size: 0.9rem;
  transition: background-color 0.2s ease;
}

.concept-links li a:hover {
  background-color: #e0e0e0;
  text-decoration: none;
}

/* Navigation Buttons */
.navigation-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid #ddd;
}

.prev-button, .next-button {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: #f5f5f5;
  border-radius: 4px;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.prev-button:hover, .next-button:hover {
  background-color: #e0e0e0;
  text-decoration: none;
}

.prev-button::before {
  content: "← ";
}

.next-button::after {
  content: " →";
}

/* Timeline Styling */
.timeline-container {
  margin: var(--spacing-lg) 0;
  position: relative;
}

.timeline {
  position: relative;
  padding: var(--spacing-md) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  width: 4px;
  background-color: #ddd;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}

.timeline-item {
  padding: 10px 40px;
  position: relative;
  width: 50%;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  right: -8px;
  top: 15px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid #ddd;
}

.timeline-item:nth-child(odd) {
  left: 0;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-item:nth-child(even)::after {
  left: -8px;
}

.timeline-content {
  padding: var(--spacing-md);
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.timeline-date {
  font-weight: bold;
  margin-bottom: var(--spacing-xs);
}

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

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

th {
  background-color: #f5f5f5;
  font-weight: 600;
}

tr:nth-child(even) {
  background-color: #f9f9f9;
}

/* Callout Boxes */
.callout {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md);
  border-radius: 8px;
  background-color: #f9f9f9;
  border-left: 4px solid #ddd;
}

.callout-title {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.callout-example {
  border-color: #4CAF50;
  background-color: rgba(76, 175, 80, 0.1);
}

.callout-caution {
  border-color: #FFC107;
  background-color: rgba(255, 193, 7, 0.1);
}

.callout-insight {
  border-color: #2196F3;
  background-color: rgba(33, 150, 243, 0.1);
}

/* Menu Toggle (hidden on desktop) */
.menu-toggle {
  display: none; /* Hidden by default on desktop */
}

/* Responsive Design */
@media (max-width: 900px) {
  body {
    display: block; /* Change from grid to block for mobile */
  }
  
  .sidebar {
    position: fixed;
    top: 0;
    left: -420px; /* Increased from -280px to match new width */
    transition: left 0.3s ease;
    z-index: 1000;
    width: 420px; /* Increased from 280px to 420px (1.5x) */
    height: 100%;
    overflow-y: auto;
  }
  
  .sidebar.open {
    left: 0;
    box-shadow: 0 0 15px rgba(0,0,0,0.2);
  }
  
  /* Body style when sidebar is open on mobile */
  body.sidebar-open::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3);
    z-index: 90;
  }
  
  .menu-toggle {
    display: block;
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 1001;
    background-color: var(--color-background);
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    cursor: pointer;
    border: 1px solid #ddd;
  }
  
  .menu-toggle.active {
    left: 290px;
  }
  
  main {
    padding-top: 60px;
    margin-left: 0;
    width: 100%;
  }
  
  .timeline::before {
    left: 40px;
  }
  
  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
  }
  
  .timeline-item::after {
    left: 32px;
  }
  
  .timeline-item:nth-child(even) {
    left: 0;
  }
  
  .timeline-item:nth-child(even)::after {
    left: 32px;
  }
}

@media (max-width: 600px) {
  html {
    font-size: 14px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  main {
    padding: var(--spacing-md);
  }
  
  .era-grid, .concept-grid {
    grid-template-columns: 1fr;
  }
}

/* Print Styles */
@media print {
  body {
    display: block;
  }
  
  .sidebar, .navigation-buttons, .menu-toggle {
    display: none;
  }
  
  main {
    max-width: 100%;
    padding: 0;
  }
  
  a {
    color: var(--color-text);
    text-decoration: none;
  }
  
  h1 {
    break-before: page;
  }
  
  h2, h3 {
    break-after: avoid;
  }
  
  .callout, table, figure {
    break-inside: avoid;
  }
}