/*
  Frontend Course Documentation - Main Stylesheet
  Modern documentation styling with sidebar navigation
*/

:root {
  /* Color palette - Light Mode (Default) */
  --primary-color: #4a90e2;
  --primary-dark: #2e5f8e;
  --accent-color: #50c878;
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-code: #282c34;
  --text-primary: #2c3e50;
  --text-secondary: #5a6c7d;
  --border-color: #e1e4e8;
  --sidebar-bg: #1e2127;
  --sidebar-text: #abb2bf;
  --sidebar-hover: #2c313a;
  --code-inline-bg: #f6f8fa;
  --code-inline-color: #e83e8c;

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

  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-code: 'Consolas', 'Monaco', 'Courier New', monospace;

  /* Layout */
  --sidebar-width: 280px;
  --max-content-width: 1200px;

  /* Info boxes */
  --info-note-bg: #e3f2fd;
  --info-note-border: #2196f3;
  --info-note-text: #0d47a1;
  --info-warning-bg: #fff3e0;
  --info-warning-border: #ff9800;
  --info-warning-text: #e65100;
  --info-tip-bg: #e8f5e9;
  --info-tip-border: #4caf50;
  --info-tip-text: #1b5e20;
  --info-important-bg: #fce4ec;
  --info-important-border: #e91e63;
  --info-important-text: #880e4f;

  /* Code editor - Light Mode */
  --code-header-bg: #f6f8fa;
  --code-text-color: #383a42;
  --line-number-bg: #fafbfc;
  --line-number-color: #9ca3af;

  /* Syntax highlighting - Light Mode */
  --syntax-keyword: #a626a4;
  --syntax-string: #50a14f;
  --syntax-comment: #a0a1a7;
  --syntax-function: #4078f2;
  --syntax-number: #986801;
  --syntax-tag: #e45649;
  --syntax-attr: #986801;
  --syntax-operator: #0184bc;
  --syntax-constant: #c18401;
  --syntax-variable: #e45649;
  --syntax-class: #c18401;
  --syntax-property: #4078f2;
}

/* Dark Mode Colors */
body.dark-mode {
  --primary-color: #5ca3f5;
  --primary-dark: #4a8fd4;
  --accent-color: #5dd890;
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-code: #1e1e1e;
  --text-primary: #e8e8e8;
  --text-secondary: #b0b0b0;
  --border-color: #404040;
  --sidebar-bg: #0d0d0d;
  --sidebar-text: #b0b0b0;
  --sidebar-hover: #1a1a1a;
  --code-inline-bg: #2d2d2d;
  --code-inline-color: #ff6b9d;

  /* Info boxes - Dark mode */
  --info-note-bg: #1a2332;
  --info-note-border: #5ca3f5;
  --info-note-text: #90caf9;
  --info-warning-bg: #2d2416;
  --info-warning-border: #ffb74d;
  --info-warning-text: #ffcc80;
  --info-tip-bg: #1b2e1f;
  --info-tip-border: #66bb6a;
  --info-tip-text: #81c784;
  --info-important-bg: #2d1a24;
  --info-important-border: #f06292;
  --info-important-text: #f48fb1;

  /* Code editor - Dark Mode */
  --code-header-bg: #21252b;
  --code-text-color: #abb2bf;
  --line-number-bg: #282c34;
  --line-number-color: #636d83;

  /* Syntax highlighting - Dark Mode */
  --syntax-keyword: #c678dd;
  --syntax-string: #98c379;
  --syntax-comment: #5c6370;
  --syntax-function: #61afef;
  --syntax-number: #d19a66;
  --syntax-tag: #e06c75;
  --syntax-attr: #d19a66;
  --syntax-operator: #56b6c2;
  --syntax-constant: #e5c07b;
  --syntax-variable: #e06c75;
  --syntax-class: #e5c07b;
  --syntax-property: #61afef;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  line-height: 1.6;
  font-size: 16px;
}

/* Layout structure */
.docs-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar navigation */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--sidebar-bg);
  color: var(--sidebar-text);
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  padding: var(--spacing-md);
  z-index: 100;
}

.sidebar-header {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h1 {
  color: #ffffff;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
}

.sidebar-header p {
  font-size: 0.875rem;
  color: var(--sidebar-text);
}

/* Dark mode toggle button */
.theme-toggle {
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--sidebar-text);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s ease;
  margin-top: var(--spacing-sm);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.theme-toggle:active {
  transform: scale(0.98);
}

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

.nav-section-title {
  color: #61afef;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

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

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

.nav-list a {
  color: var(--sidebar-text);
  text-decoration: none;
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  transition: all 0.2s ease;
  font-size: 0.9375rem;
}

.nav-list a:hover {
  background-color: var(--sidebar-hover);
  color: #ffffff;
  transform: translateX(4px);
}

.nav-list a.active {
  background-color: var(--primary-color);
  color: #ffffff;
  font-weight: 500;
}

/* Main content area */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: var(--spacing-xl) var(--spacing-lg);
  background-color: var(--bg-primary);
  min-height: 100vh;
}

.content-wrapper {
  max-width: var(--max-content-width);
  margin: 0 auto;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
  line-height: 1.3;
}

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

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

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

h4 {
  font-size: 1.25rem;
  margin-top: var(--spacing-md);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  line-height: 1.7;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

a:hover {
  border-bottom-color: var(--primary-color);
}

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

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

/* Code blocks and inline code */
code {
  font-family: var(--font-code);
  font-size: 0.9em;
  background-color: var(--code-inline-bg);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  color: var(--code-inline-color);
}

/* Code Editor Styles */
.code-editor {
  background-color: var(--bg-code);
  border-radius: 8px;
  margin-bottom: var(--spacing-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.code-editor-header {
  background-color: var(--code-header-bg);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.code-editor-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-code);
  font-size: 1rem;
  color: var(--text-secondary);
}

.code-editor-dots {
  display: flex;
  gap: 6px;
}

.code-editor-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.code-editor-dot.red { background-color: #ff5f56; }
.code-editor-dot.yellow { background-color: #ffbd2e; }
.code-editor-dot.green { background-color: #27c93f; }

.code-editor-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.code-copy-btn {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-code);
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.code-copy-btn:hover {
  background-color: var(--sidebar-hover);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.code-copy-btn.copied {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
}

.code-editor-body {
  position: relative;
  overflow-x: auto;
}

.code-with-lines {
  display: flex;
  font-family: var(--font-code);
  font-size: 1rem;
  line-height: 1.7;
}

.line-numbers {
  padding: 1rem 0;
  padding-right: 1rem;
  padding-left: 1rem;
  text-align: right;
  color: var(--line-number-color);
  user-select: none;
  border-right: 1px solid var(--border-color);
  background-color: var(--line-number-bg);
  min-width: 3rem;
}

.line-numbers span {
  display: block;
  line-height: 1.7;
}

pre {
  margin: 0;
  padding: 1rem;
  flex: 1;
  background-color: var(--bg-code);
  color: var(--code-text-color);
  overflow-x: auto;
}

pre code {
  background-color: transparent;
  color: inherit;
  padding: 0;
  font-size: 1rem;
  line-height: 1.7;
  font-family: var(--font-code);
  display: block;
}

/* Fallback for legacy inline code (not in code editor) */
body > pre,
.content > pre:not(.code-editor pre),
pre.standalone {
  border-radius: 6px;
  margin-bottom: var(--spacing-md);
  border-left: 4px solid var(--primary-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  padding: var(--spacing-md);
  background-color: var(--bg-code);
  color: var(--code-text-color);
  overflow-x: auto;
}

/* Syntax highlighting classes (new token-based) */
.token.keyword,
.token.control,
.token.directive,
.token.unit,
.keyword {
  color: var(--syntax-keyword);
}

.token.string,
.token.regex,
.string {
  color: var(--syntax-string);
}

.token.comment,
.comment {
  color: var(--syntax-comment);
  font-style: italic;
}

.token.function,
.token.function-name,
.function {
  color: var(--syntax-function);
}

.token.number,
.token.boolean,
.number {
  color: var(--syntax-number);
}

.token.tag,
.tag {
  color: var(--syntax-tag);
}

.token.attr-name,
.token.attribute,
.attr {
  color: var(--syntax-attr);
}

.token.operator,
.token.entity,
.token.url {
  color: var(--syntax-operator);
}

.token.constant,
.token.builtin {
  color: var(--syntax-constant);
}

.token.variable {
  color: var(--syntax-variable);
}

.token.class-name {
  color: var(--syntax-class);
}

.token.property {
  color: var(--syntax-property);
}

.token.punctuation {
  color: var(--code-text-color);
}

/* Selection in code blocks */
pre::selection,
code::selection,
pre *::selection,
code *::selection {
  background-color: rgba(92, 163, 245, 0.3);
}

/* Info boxes and callouts */
.info-box {
  padding: var(--spacing-md);
  border-radius: 6px;
  margin-bottom: var(--spacing-md);
  border-left: 4px solid;
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.info-box.note {
  background-color: var(--info-note-bg);
  border-color: var(--info-note-border);
  color: var(--info-note-text);
}

.info-box.warning {
  background-color: var(--info-warning-bg);
  border-color: var(--info-warning-border);
  color: var(--info-warning-text);
}

.info-box.tip {
  background-color: var(--info-tip-bg);
  border-color: var(--info-tip-border);
  color: var(--info-tip-text);
}

.info-box.important {
  background-color: var(--info-important-bg);
  border-color: var(--info-important-border);
  color: var(--info-important-text);
}

.info-box-title {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: inherit;
}

.info-box p,
.info-box ul,
.info-box li {
  color: inherit;
}

/* Demo/Example sections */
.demo-section {
  background-color: var(--bg-secondary);
  border: 2px dashed var(--border-color);
  padding: var(--spacing-lg);
  border-radius: 8px;
  margin: var(--spacing-lg) 0;
}

.demo-title {
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--primary-dark);
}

/* Code example with result */
.code-example {
  margin-bottom: var(--spacing-lg);
}

.example-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-md);
  background-color: var(--bg-primary);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

thead {
  background-color: var(--primary-color);
  color: #ffffff;
}

th {
  padding: var(--spacing-sm);
  text-align: left;
  font-weight: 600;
}

td {
  padding: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

tr:hover {
  background-color: var(--bg-secondary);
}

/* Navigation buttons */
.page-navigation {
  display: flex;
  justify-content: space-between;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 2px solid var(--border-color);
}

.nav-button {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--primary-color);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-button:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Mobile hamburger menu */
.mobile-menu-toggle {
  display: none;
  position: fixed;
  top: var(--spacing-md);
  left: var(--spacing-md);
  z-index: 200;
  background-color: var(--primary-color);
  color: #ffffff;
  border: none;
  padding: var(--spacing-sm);
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.5rem;
}

/* Responsive design */
@media (max-width: 968px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  .sidebar.active {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .content-wrapper {
    padding-top: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  :root {
    --sidebar-width: 100%;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

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

/* Dashboard specific styles */
.dashboard {
  padding: var(--spacing-xl);
}

.hero-section {
  text-align: center;
  padding: var(--spacing-xl) 0;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: #ffffff;
  border-radius: 12px;
  margin-bottom: var(--spacing-xl);
}

.hero-section h1 {
  color: #ffffff;
  border: none;
  margin-bottom: var(--spacing-md);
}

.hero-section p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
}

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

.course-card {
  background-color: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: var(--spacing-lg);
  transition: all 0.3s ease;
  cursor: pointer;
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  border-color: var(--primary-color);
}

.course-card h3 {
  color: var(--primary-color);
  margin-top: 0;
}

.course-card ul {
  margin-left: var(--spacing-md);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.project-card {
  background-color: var(--bg-primary);
  padding: var(--spacing-md);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.project-card:hover {
  border-color: var(--accent-color);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.project-card h4 {
  color: var(--accent-color);
  margin-top: 0;
  margin-bottom: var(--spacing-xs);
}

/* Smooth theme transitions */
body,
.sidebar,
.main-content,
.course-card,
.project-card,
.info-box,
.demo-section,
table,
pre,
code,
.code-editor,
.code-editor-header,
.line-numbers {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Utility classes */
.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

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