:root {
  /* Light mode colors */
  --bg-color: #ffffff;
  --text-color: #333333;
  --heading-color: #2c3e50;
  --link-color: #007bff;
  --link-hover-color: #0056b3;
  --code-bg: #f8f9fa;
  --border-color: #e9ecef;
  --shadow-color: rgba(0, 0, 0, 0.05);
  --caption-color: #666666;
  --nav-bg: #f8f9fa;
  --nav-text: #2c3e50;
  --nav-hover: #007bff;
  --nav-border: #e9ecef;
  --site-title: #2c3e50;
  --toggle-bg: #e9ecef;
  --toggle-slider: #ffffff;
}

/* Dark mode variables */
[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --text-color: #e0e0e0;
  --heading-color: #ffffff;
  --link-color: #4dabf7;
  --link-hover-color: #6ab6f8;
  --code-bg: #2d2d2d;
  --border-color: #3d3d3d;
  --shadow-color: rgba(0, 0, 0, 0.2);
  --caption-color: #bdbdbd;
  --nav-bg: #2d2d2d;
  --nav-text: #e0e0e0;
  --nav-hover: #4dabf7;
  --nav-border: #3d3d3d;
  --site-title: #ffffff;
  --toggle-bg: #3d3d3d;
  --toggle-slider: #1a1a1a;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Category styling */
.categories-container {
  display: flex;
  gap: 20px;
  margin: 30px 0;
  flex-wrap: wrap;
}

.category-card {
  flex: 1;
  min-width: 250px;
  padding: 20px;
  border-radius: 8px;
  background-color: var(--code-bg);
  box-shadow: 0 2px 4px var(--shadow-color);
  transition: transform 0.2s, box-shadow 0.2s;
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 8px var(--shadow-color);
}

.category-card h2 {
  margin-top: 0;
}

.category-card a {
  text-decoration: none;
  color: var(--heading-color);
}

.category-card a:hover {
  color: var(--link-hover-color);
}

.category-card p {
  color: var(--text-color);
}

/* Archives page styling */
.archives ul {
  list-style-type: none;
  padding-left: 0;
}

.archives li {
  margin-bottom: 8px;
  padding: 8px;
  border-radius: 4px;
  transition: background-color 0.2s;
}

.archives li:hover {
  background-color: var(--code-bg);
}

.archives .post-meta {
  color: var(--caption-color);
  margin-right: 10px;
}

.archives .post-category {
  font-size: 0.85em;
  color: var(--caption-color);
  margin-left: 10px;
}

.archives .post-category a {
  color: var(--link-color);
}

.archives .post-category a:hover {
  color: var(--link-hover-color);
}

.archives h2 {
  margin-top: 30px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 5px;
}

/* Table of Contents styling */
.toc {
  margin: 40px 0;
  background-color: #f9f9f9;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.toc h2 {
  margin-top: 0;
  border-bottom: 1px solid #e5e5e5;
  padding-bottom: 10px;
}

.toc h3 {
  margin-top: 20px;
  margin-bottom: 10px;
  font-size: 1.2em;
}

.toc ul {
  list-style-type: none;
  padding-left: 0;
}

.toc li {
  margin-bottom: 8px;
  line-height: 1.4;
}

.toc a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
}

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

.post-date {
  color: var(--caption-color);
  font-size: 0.85em;
  margin-left: 8px;
}

/* Dark mode for TOC */
[data-theme="dark"] .toc {
  background-color: #252525;
}

[data-theme="dark"] .toc h2 {
  border-bottom-color: #444;
}

[data-theme="dark"] .toc a {
  color: #e0e0e0;
}

[data-theme="dark"] .toc a:hover {
  color: #4dabf7;
}

[data-theme="dark"] .post-date {
  color: #adb5bd;
}

/* Site header and navigation styles */
.site-header {
  border-top: 5px solid var(--heading-color);
  border-bottom: 1px solid var(--nav-border);
  background-color: var(--nav-bg);
  min-height: 55.95px;
}

.site-title {
  color: var(--site-title);
  font-weight: 600;
  letter-spacing: -0.5px;
}

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

.site-nav {
  background-color: var(--nav-bg);
}

.site-nav .page-link {
  color: var(--nav-text);
  font-weight: 500;
}

.site-nav .page-link:hover {
  color: var(--nav-hover);
  text-decoration: none;
}

@media screen and (max-width: 600px) {
  .site-nav {
    background-color: var(--nav-bg);
    border-color: var(--nav-border);
  }
  
  .site-nav .menu-icon > svg path {
    fill: var(--nav-text);
  }
}

/* Post content styling */
.post img {
  display: block;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  max-width: 100%;
  height: auto;
  margin-left: auto;
  margin-right: auto;
  transition: transform 0.3s ease;
}

.post img:hover {
  transform: scale(1.02);
}

/* Post thumbnail styling for category pages */
.post-image-container {
  width: 100%;
  height: 200px;
  overflow: hidden;
  margin-bottom: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow-color);
  background-color: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.post-thumbnail {
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: center;
  transition: transform 0.3s ease;
}

.post-thumbnail:hover {
  transform: scale(1.05);
}

.post-item {
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.post-content-preview {
  padding: 0 10px;
}
  margin-left: auto;
  margin-right: auto;
  transition: transform 0.3s ease;
}

.post img:hover {
  transform: scale(1.02);
}

/* Post thumbnail styling for category pages */
.post-image-container {
  width: 100%;
  height: 200px;
  overflow: hidden;
  margin-bottom: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow-color);
  background-color: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
}

[data-theme="dark"] .post-image-container {
  background-color: #252525;
}

.post-thumbnail {
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: center;
  transition: transform 0.3s ease;
}

.post-thumbnail:hover {
  transform: scale(1.05);
}

.post-item {
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.post-content-preview {
  padding: 0 10px;
}
  margin-left: auto;
  margin-right: auto;
  transition: transform 0.3s ease;
}

.post img:hover {
  transform: scale(1.02);
}

.post figcaption {
  text-align: center;
  font-size: 0.8rem;
  font-style: italic;
  color: var(--caption-color);
  margin-top: 0.5rem;
}

/* Responsive design */
@media (max-width: 768px) {
  .post {
    padding: 1rem;
  }
  
  .theme-toggle-container {
    top: 0.5rem;
    right: 0.5rem;
  }
}

/* Dark mode adjustments */
[data-theme="dark"] .category-card {
  background-color: #2d2d2d;
}

[data-theme="dark"] .category-card a {
  color: #ffffff;
}

[data-theme="dark"] .category-card a:hover {
  color: #4dabf7;
}

/* Archives page styling */
.archives ul {
  list-style-type: none;
  padding-left: 0;
}

.archives li {
  margin-bottom: 8px;
  padding: 8px;
  border-radius: 4px;
  transition: background-color 0.2s;
}

.archives li:hover {
  background-color: #f8f9fa;
}

.archives .post-meta {
  color: #666666;
  margin-right: 10px;
}

.archives .post-category {
  font-size: 0.85em;
  color: #666666;
  margin-left: 10px;
}

.archives .post-category a {
  color: #007bff;
}

.archives .post-category a:hover {
  color: #0056b3;
}

.archives h2 {
  margin-top: 30px;
  border-bottom: 1px solid #e9ecef;
  padding-bottom: 5px;
}

/* Dark mode for archives */
[data-theme="dark"] .archives li:hover {
  background-color: #2d2d2d;
}

[data-theme="dark"] .archives .post-meta,
[data-theme="dark"] .archives .post-category {
  color: #bdbdbd;
}

[data-theme="dark"] .archives .post-category a {
  color: #4dabf7;
}

[data-theme="dark"] .archives .post-category a:hover {
  color: #6ab6f8;
}

[data-theme="dark"] .archives h2 {
  border-bottom-color: #3d3d3d;
}