/* CSS Variables for consistent theming */
:root {
  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --bg-tertiary: #2a2a2a;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --accent: #bb86fc;
  --accent-hover: #9965f4;
  --border-radius: 8px;
  --transition: 0.3s ease;
  --spacing-unit: 8px;
  --max-width: 800px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:visited {
  color: var(--accent);
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 calc(var(--spacing-unit) * 3);
}

/* Header */
header {
  padding: calc(var(--spacing-unit) * 6) 0;
  text-align: center;
  border-bottom: 1px solid var(--bg-secondary);
}

header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: calc(var(--spacing-unit) * 2);
  letter-spacing: -0.02em;
}

header h1 a {
  color: var(--text-primary);
  text-decoration: none;
}

header h1 a:hover {
  color: var(--accent);
}

header p {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* Main content */
main {
  flex: 1;
  padding: calc(var(--spacing-unit) * 4) 0;
}

/* Posts list */
.posts {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-unit) * 6);
}

.post-preview {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 4);
  transition: transform var(--transition), box-shadow var(--transition);
}

.post-preview:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.post-preview h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.post-preview h2 a {
  color: var(--text-primary);
  text-decoration: none;
}

.post-preview h2 a:hover {
  color: var(--accent);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 2);
  margin-bottom: calc(var(--spacing-unit) * 2);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.hero-image-container {
  margin-bottom: calc(var(--spacing-unit) * 4);
}

.hero-image {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: var(--border-radius);
}

.post-thumbnail {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--border-radius);
  float: left;
  margin-right: calc(var(--spacing-unit) * 3);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.tags {
  display: flex;
  gap: calc(var(--spacing-unit));
}

.tag {
  background-color: var(--bg-tertiary);
  color: var(--accent);
  padding: calc(var(--spacing-unit) / 2) var(--spacing-unit);
  border-radius: calc(var(--border-radius) / 2);
  font-size: 0.75rem;
  font-weight: 500;
}

.excerpt {
  color: var(--text-secondary);
  margin-bottom: calc(var(--spacing-unit) * 2);
  line-height: 1.7;
}

.read-more {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

.read-more:hover {
  color: var(--accent-hover);
}

/* Search */
.search-container {
  margin-bottom: calc(var(--spacing-unit) * 4);
}

#search-input {
  width: 100%;
  padding: calc(var(--spacing-unit) * 2);
  border: 1px solid var(--bg-secondary);
  border-radius: var(--border-radius);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 1rem;
}

#search-input:focus {
  outline: none;
  border-color: var(--accent);
}

/* Tabs */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--bg-secondary);
  margin-bottom: calc(var(--spacing-unit) * 4);
}

.tab-button {
  background: none;
  border: none;
  padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition), border-bottom-color var(--transition);
  border-bottom: 2px solid transparent;
}

.tab-button.active {
  color: var(--text-primary);
  border-bottom-color: var(--accent);
}

.tab-button:hover {
  color: var(--accent);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: calc(var(--spacing-unit) * 4);
  margin-top: calc(var(--spacing-unit) * 6);
  padding-top: calc(var(--spacing-unit) * 4);
  border-top: 1px solid var(--bg-secondary);
}

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

.pagination a:hover {
  color: var(--accent-hover);
}

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

/* Individual post */
.post {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 4);
}

.post-header {
  margin-bottom: calc(var(--spacing-unit) * 4);
}

.post-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: calc(var(--spacing-unit) * 2);
  line-height: 1.2;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 2);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.post-content {
  line-height: 1.8;
  margin-bottom: calc(var(--spacing-unit) * 4);
}

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

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

.post-content a:visited {
  color: var(--accent);
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  margin-top: calc(var(--spacing-unit) * 4);
  margin-bottom: calc(var(--spacing-unit) * 2);
  line-height: 1.3;
}

.post-content h1 { font-size: 1.75rem; }
.post-content h2 { font-size: 1.5rem; }
.post-content h3 { font-size: 1.25rem; }

.post-content p {
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.post-content ul,
.post-content ol {
  margin-bottom: calc(var(--spacing-unit) * 2);
  padding-left: calc(var(--spacing-unit) * 3);
}

.post-content li {
  margin-bottom: calc(var(--spacing-unit));
}

.post-content blockquote {
  border-left: 4px solid var(--accent);
  padding-left: calc(var(--spacing-unit) * 2);
  margin: calc(var(--spacing-unit) * 2) 0;
  font-style: italic;
  color: var(--text-secondary);
}

.post-content code {
  background-color: var(--bg-tertiary);
  padding: 2px 4px;
  border-radius: 3px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875em;
}

.post-content pre {
  background-color: var(--bg-tertiary);
  padding: calc(var(--spacing-unit) * 2);
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin: calc(var(--spacing-unit) * 2) 0;
}

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

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  margin: calc(var(--spacing-unit) * 2) 0;
}

.post-image {
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: calc(var(--spacing-unit) * 2) 0;
}

.post-content th,
.post-content td {
  padding: calc(var(--spacing-unit));
  border: 1px solid var(--bg-tertiary);
  text-align: left;
}

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

.post-footer {
  display: flex;
  justify-content: space-between;
  padding-top: calc(var(--spacing-unit) * 4);
  border-top: 1px solid var(--bg-tertiary);
}

.post-footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

.post-footer a:hover {
  color: var(--accent-hover);
}

/* Footer */
footer {
  padding: calc(var(--spacing-unit) * 4) 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  border-top: 1px solid var(--bg-secondary);
}

/* Focus states for accessibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Mobile responsiveness */
@media (max-width: 640px) {
  .tabs {
    flex-direction: column;
  }

  .tab-button {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
  }

  header h1 {
    font-size: 2rem;
  }

  header p {
    font-size: 1rem;
  }

  .post-preview {
    padding: calc(var(--spacing-unit) * 3);
  }

  .post {
    padding: calc(var(--spacing-unit) * 3);
  }

  .post-title {
    font-size: 1.5rem;
  }

  .container {
    padding: 0 calc(var(--spacing-unit) * 2);
  }

  .post-footer {
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 2);
  }
}

/* Print styles */
@media print {
  body {
    background: white;
    color: black;
  }

  .post-preview,
  .post {
    background: white;
    border: 1px solid #ccc;
    box-shadow: none;
  }
}