:root, [data-theme="dark"] {
  --bg-color: #000000;
  --bg-color-secondary: #0a0a0a;
  --text-color: #e5e5e5;
  --text-color-heading: #ffffff;
  --border-color: #222222;
  --card-header-bg: rgba(255, 255, 255, 0.05);
  --card-header-border: rgba(255, 255, 255, 0.08);
  
  --color-blue: #3B82F6;
  --color-purple: #8B5CF6;
  --color-green: #10B981;
  --color-orange: #F97316;
  --color-amber: #F59E0B;
  --color-pink: #EC4899;
  
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg-color: #faf9f6;
  --bg-color-secondary: #f2f0eb;
  --text-color: #333333;
  --text-color-heading: #111111;
  --border-color: #e5e3dc;
  --card-header-bg: rgba(0, 0, 0, 0.03);
  --card-header-border: rgba(0, 0, 0, 0.05);
  
  --color-blue: #2563EB;
  --color-purple: #7C3AED;
  --color-green: #059669;
  --color-orange: #EA580C;
  --color-amber: #D97706;
  --color-pink: #DB2777;
  color-scheme: light;
}

[data-theme="light"] .shiki,
[data-theme="light"] .shiki span {
  color: var(--shiki-light) !important;
  background-color: var(--shiki-light-bg) !important;
  font-style: var(--shiki-light-font-style) !important;
  font-weight: var(--shiki-light-font-weight) !important;
  text-decoration: var(--shiki-light-text-decoration) !important;
}

[data-theme="dark"] .shiki,
[data-theme="dark"] .shiki span,
:root:not([data-theme="light"]) .shiki,
:root:not([data-theme="light"]) .shiki span {
  color: var(--shiki-dark) !important;
  background-color: var(--shiki-dark-bg) !important;
  font-style: var(--shiki-dark-font-style) !important;
  font-weight: var(--shiki-dark-font-weight) !important;
  text-decoration: var(--shiki-dark-text-decoration) !important;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-sans);
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-color-heading);
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

code {
  font-family: var(--font-mono);
  background-color: var(--bg-color-secondary);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

pre {
  background-color: var(--bg-color-secondary);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--border-color);
}

pre code {
  background-color: transparent;
  padding: 0;
}

.app-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.sidebar, .toc-sidebar {
  background-color: var(--bg-color-secondary);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem;
}

.toc-sidebar {
  border-right: none;
  border-left: 1px solid var(--border-color);
}

.sidebar-header h2, .toc-header h3 {
  margin-top: 0;
  color: var(--text-color-heading);
}

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

.sidebar-nav a, .toc-nav a {
  display: block;
  padding: 0.5rem 0;
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.2s;
}

.sidebar-nav a:hover, .toc-nav a:hover {
  color: var(--color-blue);
}

.sidebar-nav a.active {
  color: var(--color-blue);
  font-weight: 600;
}

.main-content {
  padding: 2rem 4rem;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.mermaid {
  background-color: var(--bg-color-secondary);
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
  margin: 1.5rem 0;
  border: 1px solid var(--border-color);
}


  .toc-sidebar {
    display: none;
  }
}

@media (max-width: 768px) {
  .app-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
  }
  .main-content {
    padding: 1.5rem;
  }
}

.top-nav {
  display: none;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background-color: var(--bg-color-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

#menu-toggle, #theme-toggle {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
}

.mobile-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-color-heading);
}

@media (max-width: 768px) {
  .app-layout {
    display: flex;
    flex-direction: column;
  }
  .top-nav {
    display: flex; /* Show top nav on mobile */
  }
  .sidebar {
    position: fixed;
    top: 60px; /* Below top nav */
    bottom: 0;
    left: -100%; /* Hidden by default */
    width: 280px;
    z-index: 99;
    transition: left 0.3s ease;
    background-color: var(--bg-color);
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
  }
  .sidebar.open {
    left: 0; /* Slide in */
  }
  .main-content {
    padding: 1.5rem 1rem; /* Better mobile padding */
  }
  
  /* Hide desktop sidebar header stuff on mobile */
  .sidebar-header {
    display: none !important;
  }
}