/* CSS Variables for theming */
:root {
  --bg-color: #ffffff;
  --text-color: #24292e;
  --pre-bg: #f6f8fa;
  --border-color: #d0d7de;
  --heading-border: #d8dee4;
  --link-color: #0969da;
  --blockquote-border: #d0d7de;
  --blockquote-text: #57606a;
}

[data-theme="dark"] {
  --bg-color: #0d1117;
  --text-color: #c9d1d9;
  --pre-bg: #161b22;
  --border-color: #30363d;
  --heading-border: #21262d;
  --link-color: #58a6ff;
  --blockquote-border: #3b434b;
  --blockquote-text: #8b949e;
}

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

body, h1, h2, h3, h4, h5, h6, a, blockquote, .theme-toggle {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
  line-height: 1.6;
  background-color: var(--bg-color);
  color: var(--text-color);
  display: flex;
  min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
  width: 280px;
  background-color: var(--pre-bg);
  border-right: 1px solid var(--border-color);
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 20px;
  z-index: 100;
}

.sidebar h2 {
  font-size: 1.2rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar ul {
  list-style: none;
}

.sidebar li {
  margin: 8px 0;
}

.sidebar a {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--text-color);
  text-decoration: none;
  transition: background-color 0.2s ease;
}

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

.sidebar a.active {
  background-color: var(--link-color);
  color: white;
  font-weight: 600;
}

/* Navigation Folder Styles */
.sidebar .nav-root {
  margin-bottom: 16px;
}

.sidebar .nav-folder {
  margin-bottom: 12px;
}

.sidebar .folder-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  border-radius: 6px;
  transition: background-color 0.2s ease;
  user-select: none;
}

.sidebar .folder-header:hover {
  background-color: var(--bg-color);
}

.sidebar .folder-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.sidebar .folder-name {
  flex: 1;
  font-weight: 600;
  font-size: 0.95rem;
}

.sidebar .folder-toggle {
  font-size: 12px;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.sidebar .folder-header.collapsed .folder-toggle {
  transform: rotate(-90deg);
}

.sidebar .folder-content {
  list-style: none;
  margin-left: 20px;
  margin-top: 4px;
  overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.3s ease;
  max-height: 1000px;
  opacity: 1;
}

.sidebar .folder-content.collapsed {
  max-height: 0;
  opacity: 0;
  margin-top: 0;
}

/* Date Group Styles - Distinctive styling for date-based groupings */
.sidebar .date-group .folder-header {
  background-color: transparent;
  border-left: 3px solid var(--link-color);
  padding-left: 9px;
}

.sidebar .date-group .folder-header:hover {
  background-color: rgba(88, 166, 255, 0.1);
}

.sidebar .date-group .folder-name {
  color: var(--link-color);
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

/* Custom Group Styles - Distinctive styling for GRP- based groupings */
.sidebar .custom-group .folder-header {
  background-color: transparent;
  border-left: 3px solid #8b949e;
  padding-left: 9px;
}

.sidebar .custom-group .folder-header:hover {
  background-color: rgba(139, 148, 158, 0.1);
}

.sidebar .custom-group .folder-name {
  color: #8b949e;
  font-size: 0.9rem;
  font-weight: 500;
  text-transform: capitalize;
}

/* Main Content Area */
.main-content {
  flex: 1;
  padding: 60px 40px 40px;
}

.content-wrapper {
  max-width: 900px;
}

/* Theme Toggle Button */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 10px 16px;
  background: var(--pre-bg);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 1000;
}

.theme-toggle:hover {
  opacity: 0.8;
}

.theme-icon {
  font-size: 18px;
}

pre {
  background: var(--pre-bg);
  padding: 16px;
  border-radius: 6px;
  overflow-x: auto;
  border: 1px solid var(--border-color);
}

code:not(pre code) {
  background: var(--pre-bg);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.9em;
}

h1, h2, h3, h4, h5, h6 {
  margin-top: 24px;
  margin-bottom: 16px;
  font-weight: 600;
  line-height: 1.25;
}

h1 {
  border-bottom: 1px solid var(--heading-border);
  padding-bottom: 8px;
}

h2 {
  border-bottom: 1px solid var(--heading-border);
  padding-bottom: 8px;
}

a {
  color: var(--link-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

blockquote {
  margin: 0;
  padding: 0 16px;
  border-left: 4px solid var(--blockquote-border);
  color: var(--blockquote-text);
}

/* Disable transition for syntax highlighted code */
pre, pre *, code, code * {
  transition: none !important;
}

/* Shiki dual-theme support
   Note: Shiki generates inline colors for light theme and CSS variables for dark theme
   Light theme: style="color:#D73A49" (inline)
   Dark theme: --shiki-dark:#F97583 (CSS variable)
*/

/* Dark theme: override with CSS variables */
[data-theme="dark"] .shiki,
[data-theme="dark"] .shiki span {
  color: var(--shiki-dark) !important;
  background-color: var(--shiki-dark-bg) !important;
}

/* Respect system preference when no explicit theme is set */
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) .shiki,
  html:not([data-theme="light"]) .shiki span {
    color: var(--shiki-dark) !important;
    background-color: var(--shiki-dark-bg) !important;
  }
}

/* Responsive Design for Mobile */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
  }

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

  .main-content {
    margin-left: 0 !important;
    padding: 60px 20px 20px;
  }

  .theme-toggle {
    top: 10px;
    right: 10px;
    padding: 8px 12px;
    font-size: 0.9rem;
  }

  .menu-toggle {
    display: block !important;
    position: fixed;
    top: 10px;
    left: 10px;
    padding: 8px 12px;
    background: var(--pre-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    z-index: 1001;
    font-size: 1.2rem;
  }

  .content-wrapper {
    max-width: 100%;
  }
}

.menu-toggle {
  display: none;
}