:root {
  /* Light Mode Colors */
  --color-primary: #3a86ff;
  --color-primary-darker: #2563eb;
  --color-secondary: #ff006e;
  --color-text: #111827;
  --color-text-secondary: #4b5563;
  --color-text-tertiary: #9ca3af;
  --color-background: #ffffff;
  --color-background-secondary: #f3f4f6;
  --color-border: #e5e7eb;
  --color-shadow: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
  /* Dark Mode Colors */
  --color-primary: #60a5fa;
  --color-primary-darker: #93c5fd;
  --color-text: #f3f4f6;
  --color-text-secondary: #d1d5db;
  --color-text-tertiary: #9ca3af;
  --color-background: #111827;
  --color-background-secondary: #1f2937;
  --color-border: #374151;
  --color-shadow: rgba(0, 0, 0, 0.25);
}

:root {
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', sans-serif;
  --font-serif: 'Playfair Display', Georgia, Cambria, 'Times New Roman', serif;
  --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
  
  /* Sizing */
  --container-width: 1200px;
  --header-height: 80px;
  --content-width: 950px;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-24: 6rem;
  
  /* Borders */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.5s ease;
}

/* Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.2;
  margin-top: 0;
  margin-bottom: var(--spacing-4);
  color: var(--color-text);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-top: 0;
  margin-bottom: var(--spacing-4);
}

blockquote {
  border-left: 4px solid var(--color-primary);
  margin-left: 0;
  padding-left: var(--spacing-4);
  font-style: italic;
  color: var(--color-text-secondary);
}

/* Header */
.site-header {
  height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 3px var(--color-shadow);
  position: sticky;
  top: 0;
  background-color: var(--color-background);
  z-index: 100;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-content {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  flex-direction: column;
}

.site-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
}

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

.site-description {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* Navigation */
.main-nav {
  display: flex;
  align-items: center;
}

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

.nav-links li {
  margin-left: var(--spacing-6);
}

.nav-links li a {
  color: var(--color-text);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-links li a:hover {
  color: var(--color-primary);
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
  margin-right: var(--spacing-2);
}

.menu-toggle .bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  margin: 4px 0;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle.active .bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle.active .bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active .bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
  margin-left: var(--spacing-4);
  padding: var(--spacing-1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--color-background-secondary);
}

.theme-toggle .sun-icon {
  display: none;
}

.theme-toggle .moon-icon {
  display: block;
}

body.dark-mode .theme-toggle .sun-icon {
  display: block;
}

body.dark-mode .theme-toggle .moon-icon {
  display: none;
}

/* Page Header */
.page-header {
  padding: var(--spacing-16) 0 var(--spacing-8);
  text-align: center;
  background-color: var(--color-background-secondary);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.page-title {
  margin: 0;
  font-size: 3rem;
  color: var(--color-text);
}

/* Page Content */
.page-content {
  padding: var(--spacing-8) 0 var(--spacing-16);
  flex: 1;
}

.content-wrapper {
  display: flex;
  margin: 0 auto;
  max-width: var(--content-width);
  width: 100%;
}

.markdown-content {
  width: 100%;
}

/* Table of Contents */
.toc-container {
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-8));
  width: 240px;
  margin-right: var(--spacing-8);
  font-size: 0.875rem;
  max-height: calc(100vh - var(--header-height) - var(--spacing-16));
  overflow-y: auto;
  visibility: hidden;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.toc-container.visible {
  visibility: visible;
  opacity: 1;
  transform: translateX(0);
}

.toc-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-2);
  color: var(--color-text);
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-list-item {
  margin-bottom: var(--spacing-2);
  position: relative;
}

.toc-list-item a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: block;
  padding: var(--spacing-1) 0 var(--spacing-1) var(--spacing-6);
  font-size: 0.875rem;
}

.toc-list-item a:hover {
  color: var(--color-primary);
}

.toc-list-item a.active {
  color: var(--color-primary);
  font-weight: 500;
}

.toc-list-item::before {
  content: '•';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-primary);
}

/* Add indentation for sub-headers */
.toc-list-item .toc-list {
  margin-left: var(--spacing-4);
}

.toc-list-item .toc-list .toc-list {
  margin-left: var(--spacing-8);
}

/* Footer */
.site-footer {
  background-color: var(--color-background-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-8) 0;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-info {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.footer-links {
  display: flex;
  gap: var(--spacing-4);
}

.footer-links a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

/* Markdown Content Styling */
.markdown-content {
  line-height: 1.8;
}

.markdown-content h1, 
.markdown-content h2, 
.markdown-content h3, 
.markdown-content h4, 
.markdown-content h5, 
.markdown-content h6 {
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-4);
  position: relative;
}

.markdown-content h2::before {
  content: "";
  display: block;
  height: 1px;
  width: 100%;
  background-color: var(--color-border);
  margin-bottom: var(--spacing-6);
}

.markdown-content ul, 
.markdown-content ol {
  padding-left: var(--spacing-6);
  margin-bottom: var(--spacing-6);
}

.markdown-content li {
  margin-bottom: var(--spacing-2);
}

.markdown-content img {
  border-radius: var(--radius-md);
  margin: var(--spacing-6) auto;
  max-width: 100%;
  height: auto;
}

.markdown-content code {
  font-family: var(--font-mono);
  background-color: var(--color-background-secondary);
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
  font-size: 0.875em;
}

.markdown-content pre {
  background-color: var(--color-background-secondary);
  padding: var(--spacing-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--spacing-6) 0;
}

.markdown-content pre code {
  background-color: transparent;
  padding: 0;
  font-size: 0.875rem;
  color: var(--color-text);
}

.markdown-content table {
  width: 100%;
  margin: var(--spacing-6) 0;
  border-collapse: collapse;
}

.markdown-content table th {
  background-color: var(--color-background-secondary);
  border-bottom: 2px solid var(--color-border);
  padding: var(--spacing-2) var(--spacing-4);
  text-align: left;
}

.markdown-content table td {
  padding: var(--spacing-2) var(--spacing-4);
  border-bottom: 1px solid var(--color-border);
}

/* Media Queries */
@media (max-width: 1024px) {
  :root {
    --header-height: 70px;
  }
  
  .content-wrapper {
    max-width: 100%;
  }
  
  .toc-container {
    display: none;
  }
}

@media (max-width: 768px) {
  .page-header {
    padding: var(--spacing-8) 0 var(--spacing-6);
  }
  
  .page-title {
    font-size: 2.25rem;
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: center;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    flex-direction: column;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
    z-index: 99;
  }
  
  .nav-links.active {
    max-height: 300px;
    overflow-y: auto;
  }
  
  .nav-links li {
    margin: 0;
    width: 100%;
    text-align: center;
  }
  
  .nav-links li a {
    display: block;
    padding: var(--spacing-4);
    border-bottom: 1px solid var(--color-border);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  :root {
    --header-height: 60px;
  }
  
  .page-title {
    font-size: 2rem;
  }
  
  .site-title {
    font-size: 1.25rem;
  }
  
  .site-description {
    font-size: 0.75rem;
  }
  
  .logo {
    max-width: 200px;
  }
}

/* Category Page Styles */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
  list-style: none;
  padding: 0;
}

.category-card {
  display: block;
  padding: 2rem;
  background-color: var(--color-background-secondary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--color-text);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-align: center;
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 12px var(--color-shadow);
}

.category-card-title {
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
  color: var(--color-primary);
  text-transform: capitalize;
}

.category-card-count {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin: 0;
}

/* Post Grid Styles */
.post-grid {
  margin-top: 2rem;
}

.post-card {
  background-color: var(--color-background-secondary);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  margin-bottom: 1.5rem;
  position: relative;
  overflow: hidden;
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.post-card:hover::before {
  transform: scaleX(1);
}

.post-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
  border-color: rgba(58, 134, 255, 0.3);
}

.post-card-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.post-card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
  line-height: 1.3;
}

.post-card-title a {
  text-decoration: none;
  color: var(--color-text);
}

.post-card-title a:hover {
  color: var(--color-primary);
}

.post-card-date {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: auto;
  padding-top: 1rem;
  font-weight: 500;
  letter-spacing: 0.025em;
}

/* Featured Post */
.featured-post {
  background: linear-gradient(135deg, var(--color-background-secondary) 0%, rgba(58, 134, 255, 0.05) 100%);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2.5rem;
  margin-bottom: 3rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.featured-post:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.featured-post::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
}

.featured-post-title {
  font-size: 2.25rem;
  margin: 0 0 0.75rem;
  font-weight: 700;
  line-height: 1.2;
}

.featured-post-title a {
  text-decoration: none;
  color: var(--color-primary);
}

.featured-post-date {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

.featured-post-excerpt p {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

body.dark-mode .featured-post-title a {
    color: #60a5fa; /* A light blue for the featured post title */
}

body.dark-mode .post-card-title a {
    color: #60a5fa; /* Match featured post title color */
}

body.dark-mode .post-card-title a:hover,
body.dark-mode .featured-post-title a:hover {
  color: #93c5fd; /* A lighter blue for hover */
}

/* Year Sections */
.year-section h2 {
  font-size: 2.25rem;
  margin: 3rem 0 1.5rem;
  color: var(--color-text);
  position: relative;
  padding-bottom: 0.5rem;
}

.year-section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
}

.year-section {
  margin-bottom: 2rem;
}

.year-section:first-of-type h2 {
  margin-top: 2rem;
}

.year-section:last-of-type {
  margin-bottom: 0;
}

/* Add subtle fade-in animation for posts */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.post-card {
  animation: fadeInUp 0.6s ease-out;
}

.featured-post {
  animation: fadeInUp 0.6s ease-out;
}

/* Stagger animation delays for a nice cascading effect */
.post-card:nth-child(1) { animation-delay: 0.1s; }
.post-card:nth-child(2) { animation-delay: 0.2s; }
.post-card:nth-child(3) { animation-delay: 0.3s; }
.post-card:nth-child(4) { animation-delay: 0.4s; }
.post-card:nth-child(5) { animation-delay: 0.5s; }
.post-card:nth-child(6) { animation-delay: 0.6s; }

/* Improve readability with better line spacing */
.markdown-content {
  line-height: 1.7;
}

/* Add a subtle background pattern for visual interest */
body {
  background-image: radial-gradient(circle at 1px 1px, rgba(58, 134, 255, 0.03) 1px, transparent 0);
  background-size: 20px 20px;
}

/* Years TOC Styling */
.toc-container.visible {
  background: var(--color-background-secondary);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.toc-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  list-style: none !important;
  margin: 0;
  padding: 0;
}

.toc-list-item {
  list-style: none !important;
  list-style-type: none !important;
}

.toc-list-item::before {
  display: none !important;
}

.toc-list-item::marker {
  display: none !important;
}

.toc-list-item a {
  display: block;
  padding: 0.75rem 1rem;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  transition: all 0.2s ease;
  text-align: center;
}

.toc-list-item a:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .post-card-content {
    padding: 1.5rem;
  }
  
  .featured-post {
    padding: 1.5rem;
  }
  
  .year-section h2 {
    font-size: 1.875rem;
  }
}

/* Anonymity Series Floating Sidebar */
.anonymity-sidebar {
  position: fixed;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 280px;
  max-height: 80vh;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 25px var(--color-shadow);
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  padding: var(--spacing-6);
  overflow-y: auto;
  font-size: 0.875rem;
}

.anonymity-sidebar.visible {
  opacity: 1;
  pointer-events: auto;
}

.anonymity-sidebar-header {
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-3);
  border-bottom: 1px solid var(--color-border);
}

.anonymity-sidebar-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 var(--spacing-2) 0;
  color: var(--color-text);
}

.anonymity-sidebar-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin: 0;
  font-style: italic;
}

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

.anonymity-sidebar-nav li {
  margin-bottom: var(--spacing-2);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.anonymity-sidebar-nav li:hover {
  background-color: var(--color-background-secondary);
}

.anonymity-sidebar-nav li.current {
  background-color: rgba(58, 134, 255, 0.1);
  border-left: 3px solid var(--color-primary);
  padding-left: var(--spacing-2);
}

.anonymity-sidebar-nav a {
  display: block;
  padding: var(--spacing-2) var(--spacing-3);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 400;
  line-height: 1.4;
  transition: color var(--transition-fast);
}

.anonymity-sidebar-nav li.current a {
  color: var(--color-primary);
  font-weight: 500;
}

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

.anonymity-sidebar-nav .chapter-number {
  font-weight: 600;
  color: var(--color-primary);
}

.anonymity-sidebar-nav .chapter-title {
  display: block;
  font-size: 0.8rem;
}

.anonymity-sidebar-nav .chapter-subtitle {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-tertiary);
  margin-top: var(--spacing-1);
}

.anonymity-sidebar-toggle {
  position: fixed;
  left: 20px;
  top: 120px;
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(58, 134, 255, 0.3);
  z-index: 51;
  transition: all var(--transition-normal);
  font-size: 1.2rem;
}

.anonymity-sidebar-toggle:hover {
  background: var(--color-primary-darker);
  transform: scale(1.1);
}

.anonymity-sidebar-toggle.sidebar-open {
  left: 320px;
}

/* Responsive behavior */
@media (max-width: 1400px) {
  .anonymity-sidebar {
    width: 260px;
  }
}

@media (max-width: 1200px) {
  .anonymity-sidebar {
    width: 240px;
    left: 10px;
  }
  
  .anonymity-sidebar-toggle {
    left: 10px;
  }
  
  .anonymity-sidebar-toggle.sidebar-open {
    left: 260px;
  }
}

@media (max-width: 768px) {
  .anonymity-sidebar {
    width: 100%;
    left: 0;
    top: var(--header-height);
    transform: none;
    max-height: calc(100vh - var(--header-height));
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
  
  .anonymity-sidebar-toggle {
    left: 10px;
    top: calc(var(--header-height) + 10px);
  }
  
  .anonymity-sidebar-toggle.sidebar-open {
    left: 10px;
  }
}