/* Reset and base styles */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #666666;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-border: #e5e7eb;
  --color-code-bg: #f3f4f6;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, Monaco, monospace;
  --max-width: 1200px;
  --spacing: 1.5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f172a;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-primary: #60a5fa;
    --color-primary-hover: #93c5fd;
    --color-border: #334155;
    --color-code-bg: #1e293b;
  }
}

html {
  font-size: 16px;
  line-height: 1.6;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: linear-gradient(180deg, var(--color-bg) 0%, color-mix(in srgb, var(--color-bg) 85%, var(--color-primary)) 100%);
  background-attachment: fixed;
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

/* Header */
.site-header {
  padding: var(--spacing) 0;
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.logo:hover {
  color: var(--color-primary);
}

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

.nav a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

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

/* Main content */
.main {
  padding: calc(var(--spacing) * 2) 0;
}

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

/* Home page */
.home,
.list-page,
.post {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing);
}

.hero {
  text-align: center;
  margin-bottom: calc(var(--spacing) * 2);
}

.hero h1 {
  font-size: 2.5rem;
  margin: 0 0 0.5rem;
}

.site-description {
  color: var(--color-text-muted);
  font-size: 1.125rem;
  margin: 0;
}

/* Tags cloud */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: calc(var(--spacing) * 1.5);
  padding-bottom: calc(var(--spacing) * 1.5);
  border-bottom: 1px solid var(--color-border);
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.4rem 0.75rem;
  background-color: var(--color-code-bg);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  transition: all 0.2s ease;
}

.tag-chip:hover {
  background-color: var(--color-primary);
  color: #ffffff;
}

.tag-chip span {
  font-size: 0.7rem;
  opacity: 0.7;
}

.tag-chip:hover span {
  opacity: 1;
}

/* Posts section */
.posts h2 {
  font-size: 1.25rem;
  margin: 0 0 var(--spacing);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing);
}

.post-preview {
  display: flex;
  flex-direction: column;
  background-color: var(--color-code-bg);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.post-preview:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.post-image {
  width: 100%;
  height: 160px;
  overflow: hidden;
}

.post-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.2s ease;
}

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

.post-content-preview {
  padding: var(--spacing);
  flex: 1;
  display: flex;
  flex-direction: column;
}

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

.post-content-preview p {
  flex: 1;
}

.post-content-preview .read-more-btn {
  align-self: flex-start;
}

.post-preview header {
  margin-bottom: 0.5rem;
}

.post-preview h3 {
  font-size: 1.25rem;
  margin: 0 0 0.25rem;
}

.post-preview h3 a {
  color: var(--color-text);
}

.post-preview h3 a:hover {
  color: var(--color-primary);
}

.post-preview time {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.post-preview p {
  margin: 0.5rem 0;
  color: var(--color-text-muted);
}

.read-more {
  font-size: 0.875rem;
  font-weight: 500;
}

.read-more-btn {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.5rem 1rem;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 6px;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.read-more-btn:hover {
  background-color: var(--color-primary-hover);
  color: #ffffff;
  transform: translateY(-1px);
}

/* Single post */
.post-header {
  margin-bottom: calc(var(--spacing) * 2);
}

.post-header h1 {
  font-size: 2rem;
  margin: 0 0 0.75rem;
  line-height: 1.3;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.tags {
  margin-top: 0.75rem;
}

.tag {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  margin-right: 0.5rem;
  font-size: 0.75rem;
  background-color: var(--color-code-bg);
  border-radius: 4px;
  color: var(--color-text-muted);
}

.tag:hover {
  color: var(--color-primary);
}

/* Post content */
.post-content {
  line-height: 1.8;
}

.post-content h2,
.post-content h3,
.post-content h4 {
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.post-content h2 {
  font-size: 1.5rem;
}

.post-content h3 {
  font-size: 1.25rem;
}

.post-content p {
  margin: 1rem 0;
}

.post-content ul,
.post-content ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.post-content li {
  margin: 0.5rem 0;
}

.post-content blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-code-bg);
  font-style: italic;
}

.post-content blockquote p {
  margin: 0;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.2em 0.4em;
  background-color: var(--color-code-bg);
  border-radius: 4px;
}

.post-content pre {
  margin: 1.5rem 0;
  padding: 1rem;
  background-color: var(--color-code-bg);
  border-radius: 8px;
  overflow-x: auto;
}

.post-content pre code {
  padding: 0;
  background: none;
}

.post-content table {
  width: 100%;
  margin: 1.5rem 0;
  border-collapse: collapse;
}

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

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

/* Post footer navigation */
.post-footer {
  display: flex;
  justify-content: space-between;
  margin-top: calc(var(--spacing) * 2);
  padding-top: var(--spacing);
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.prev-post,
.next-post {
  max-width: 45%;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: calc(var(--spacing) * 2);
  font-size: 0.875rem;
}

.pagination span {
  color: var(--color-text-muted);
}

/* Footer */
.site-footer {
  padding: calc(var(--spacing) * 2) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.site-footer p {
  margin: 0 0 0.5rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.social-links a {
  color: var(--color-text-muted);
}

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

/* List page header */
.list-header {
  margin-bottom: calc(var(--spacing) * 2);
}

.list-header h1 {
  font-size: 2rem;
  margin: 0 0 0.5rem;
}

.list-header p {
  color: var(--color-text-muted);
  margin: 0;
}

/* Responsive */
@media (max-width: 900px) {
  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  html {
    font-size: 15px;
  }

  .site-header .container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav {
    gap: 1rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .posts-grid {
    grid-template-columns: 1fr;
  }

  .post-header h1 {
    font-size: 1.5rem;
  }

  .post-footer {
    flex-direction: column;
    gap: 1rem;
  }

  .prev-post,
  .next-post {
    max-width: 100%;
  }
}