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

:root {
  --primary-color: #2563eb;
  --text-color: #1f2937;
  --text-light: #6b7280;
  --bg-color: #ffffff;
  --bg-secondary: #f9fafb;
  --border-color: #e5e7eb;
  --code-bg: #f3f4f6;
  --link-color: #2563eb;
  --link-hover: #1d4ed8;
}

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

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
  margin-bottom: 3rem;
}

.site-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

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

.site-title a:hover {
  color: var(--link-hover);
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

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

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

/* Home page */
.intro {
  margin-bottom: 3rem;
  text-align: center;
}

.intro h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.intro p {
  font-size: 1.125rem;
  color: var(--text-light);
}

.posts-list h2 {
  font-size: 1.75rem;
  margin-bottom: 2rem;
  color: var(--text-color);
}

.posts-grid {
  display: grid;
  gap: 2rem;
}

.post-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  transition: box-shadow 0.2s;
}

.post-card:hover {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.post-card-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

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

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

.post-card-meta {
  color: var(--text-light);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.post-card-excerpt {
  color: var(--text-light);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.post-card-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Post page */
.post {
  margin-bottom: 3rem;
}

.post-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.post-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-light);
  font-size: 0.875rem;
}

.post-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--code-bg);
  border-radius: 0.25rem;
  font-size: 0.875rem;
  color: var(--text-color);
}

/* Post content */
.post-content {
  font-size: 1.0625rem;
  line-height: 1.75;
}

.post-content h2 {
  font-size: 1.875rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.post-content h3 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text-color);
}

.post-content h4 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.post-content p {
  margin-bottom: 1.5rem;
}

.post-content ul,
.post-content ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

.post-content li {
  margin-bottom: 0.5rem;
}

.post-content a {
  color: var(--link-color);
  text-decoration: underline;
}

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

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  margin: 2rem 0;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.post-content video {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  margin: 2rem 0;
}

.post-content blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: 1.5rem;
  margin: 2rem 0;
  color: var(--text-light);
  font-style: italic;
}

.post-content code {
  background-color: var(--code-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
  font-family: 'Courier New', Courier, monospace;
}

.post-content pre {
  margin: 2rem 0;
  padding: 1.5rem;
  background-color: #1e293b;
  border-radius: 0.5rem;
  overflow-x: auto;
}

.post-content pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: #e2e8f0;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}

.post-content th,
.post-content td {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.post-content th {
  background-color: var(--bg-secondary);
  font-weight: 600;
}

/* Post navigation */
.post-navigation {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

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

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

/* Footer */
.site-footer {
  margin-top: 4rem;
  padding: 2rem 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-light);
}

/* Responsive */
@media (max-width: 768px) {
  .post-title {
    font-size: 2rem;
  }
  
  .intro h2 {
    font-size: 1.5rem;
  }
  
  .post-content {
    font-size: 1rem;
  }
  
  .post-content pre {
    padding: 1rem;
  }
}