/* ========================================
   Design Tokens
   ======================================== */

:root {
  /* Colors - Warm, cream palette */
  --color-primary: #2c3e50;
  --color-secondary: #7f8c8d;
  --color-accent: #e74c3c;
  --color-text: #2c3e50;
  --color-text-light: #7f8c8d;
  --color-bg: #faf8f5;
  --color-bg-alt: #f5f2ed;
  --color-border: #e8e4dd;
  --color-link: #3498db;
  --color-link-hover: #2980b9;
  
  /* Typography */
  --font-serif: 'Crimson Pro', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Typography scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1.125rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.5rem;
  --text-4xl: 3rem;
  
  /* Layout */
  --max-width: 1200px;
  --content-width: 42rem;
  --header-height: 4rem;
  
  /* Effects */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
  --transition: 0.2s ease;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #e8e6e1;
    --color-secondary: #a8a8a8;
    --color-accent: #ff6b6b;
    --color-text: #e8e6e1;
    --color-text-light: #a8a8a8;
    --color-bg: #1a1a1a;
    --color-bg-alt: #242424;
    --color-border: #333333;
    --color-link: #5dade2;
    --color-link-hover: #85c1e9;
  }
}

/* ========================================
   Reset & Base
   ======================================== */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--space-md);
  color: var(--color-primary);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin: 0 0 var(--space-lg);
}

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

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

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

/* ========================================
   Layout
   ======================================== */

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

.content {
  max-width: var(--content-width);
  margin: 0 auto;
}

/* ========================================
   Header
   ======================================== */

.site-header {
  position: sticky;
  top: 0;
  background: rgba(250, 248, 245, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  height: var(--header-height);
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background: rgba(26, 26, 26, 0.95);
  }
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.site-logo {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* Hamburger button */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  flex-direction: column;
  gap: 5px;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.is-open .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.is-open .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger.is-open .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========================================
   Main
   ======================================== */

.site-main {
  min-height: calc(100vh - var(--header-height) - 200px);
  padding: var(--space-3xl) 0;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
  text-align: center;
  margin-bottom: var(--space-3xl);
  padding: var(--space-2xl) 0;
}

.hero-title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-md);
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   Sections
   ======================================== */

.featured-section,
.recent-section,
.categories-section {
  margin-bottom: var(--space-3xl);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
}

.section-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-xl);
}

.view-all {
  font-size: var(--text-sm);
  color: var(--color-link);
  text-decoration: none;
  font-weight: 500;
}

/* ========================================
   Featured Grid
   ======================================== */

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}

.featured-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-xl);
  transition: transform var(--transition), box-shadow var(--transition);
}

.featured-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

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

.card-date {
  color: var(--color-text-light);
}

.card-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.card-excerpt {
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.card-tags {
  display: flex;
  gap: var(--space-xs);
}

.tag {
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg);
  border-radius: 4px;
  font-size: var(--text-xs);
}

/* ========================================
   Posts List
   ======================================== */

.posts-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.post-preview {
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.post-preview:last-child {
  border-bottom: none;
}

.preview-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.preview-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.preview-title {
  font-size: var(--text-xl);
  margin: 0;
  color: var(--color-primary);
  transition: color var(--transition);
}

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

.preview-date {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  white-space: nowrap;
}

.preview-excerpt {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.preview-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.preview-category {
  color: var(--color-accent);
  font-weight: 500;
}

.preview-separator {
  opacity: 0.5;
}

/* ========================================
   Categories
   ======================================== */

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
}

.category-card {
  display: block;
  padding: var(--space-lg);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
}

.category-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.category-name {
  font-size: var(--text-lg);
  margin: 0 0 var(--space-xs);
  color: var(--color-primary);
}

.category-count {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

/* ========================================
   Article
   ======================================== */

.post-article {
  margin-bottom: var(--space-3xl);
}

.article-header {
  max-width: var(--content-width);
  margin: 0 auto var(--space-3xl);
  text-align: center;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.article-category {
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
}

.meta-separator {
  opacity: 0.5;
}

.article-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

.article-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.article-tag {
  padding: var(--space-xs) var(--space-md);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: var(--text-sm);
}

.article-video {
  position: relative;
  width: 100%;
  max-width: var(--content-width);
  margin: var(--space-md) auto 0;
  aspect-ratio: 16 / 9;
}

.article-video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 8px;
}

.article-author {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

/* Article Content */
.article-content {
  max-width: var(--content-width);
  margin: 0 auto;
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  line-height: 1.8;
}

.article-content h2 {
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
}

.article-content h3 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.article-content p {
  margin-bottom: var(--space-xl);
}

.article-content a {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-color: rgba(52, 152, 219, 0.3);
  text-underline-offset: 0.2em;
  transition: text-decoration-color var(--transition);
}

.article-content a:hover {
  text-decoration-color: var(--color-link);
}

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: var(--space-xl) 0;
}

.article-content blockquote {
  margin: var(--space-xl) 0;
  padding-left: var(--space-xl);
  border-left: 4px solid var(--color-accent);
  font-style: italic;
  color: var(--color-text-light);
}

.article-content code {
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
  padding: 0.2em 0.4em;
  background: var(--color-bg-alt);
  border-radius: 3px;
}

.article-content pre {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-lg);
  overflow-x: auto;
  margin: var(--space-xl) 0;
}

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

.article-content ul,
.article-content ol {
  margin: var(--space-lg) 0;
  padding-left: var(--space-xl);
}

.article-content li {
  margin-bottom: var(--space-sm);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-xl) 0;
}

.article-content th,
.article-content td {
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  text-align: left;
}

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

/* Article Footer */
.article-footer {
  max-width: var(--content-width);
  margin: var(--space-3xl) auto 0;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.article-keywords {
  margin-bottom: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.article-share {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--text-sm);
}

.share-label {
  font-weight: 600;
  color: var(--color-text-light);
}

.share-link {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  text-decoration: none;
  transition: all var(--transition);
}

.share-link:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* Related Posts */
.related-posts {
  background: var(--color-bg-alt);
  padding: var(--space-3xl) 0;
  margin-top: var(--space-3xl);
}

.related-title {
  font-size: var(--text-2xl);
  text-align: center;
  margin-bottom: var(--space-xl);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.related-card {
  padding: var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: transform var(--transition);
}

.related-card:hover {
  transform: translateY(-2px);
}

.related-card a {
  text-decoration: none;
  color: inherit;
}

.related-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  font-size: var(--text-xs);
}

.related-category {
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
}

.related-date {
  color: var(--color-text-light);
}

.related-card-title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.related-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  line-height: 1.6;
}

/* Back Link */
.back-link {
  margin-top: var(--space-2xl);
  text-align: center;
}

.back-link a {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

/* ========================================
   Search
   ======================================== */

.search-container {
  max-width: var(--content-width);
  margin: 0 auto;
}

.search-box {
  position: relative;
  margin-bottom: var(--space-xl);
}

.search-input {
  width: 100%;
  padding: var(--space-lg);
  font-size: var(--text-lg);
  font-family: var(--font-sans);
  background: var(--color-bg-alt);
  border: 2px solid var(--color-border);
  border-radius: 8px;
  transition: border-color var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-link);
}

.search-clear {
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: var(--text-2xl);
  color: var(--color-text-light);
  cursor: pointer;
  padding: var(--space-sm);
  line-height: 1;
}

.search-stats {
  margin-bottom: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.search-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.search-result {
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.search-result:last-child {
  border-bottom: none;
}

.search-result a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.search-result-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.search-result mark {
  background: rgba(52, 152, 219, 0.2);
  color: inherit;
  padding: 0.1em 0.2em;
  border-radius: 2px;
}

.search-result-excerpt {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.search-result-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.search-result-category {
  color: var(--color-accent);
  font-weight: 500;
}

.search-empty {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-text-light);
}

/* ========================================
   Page
   ======================================== */

.page-article {
  max-width: var(--content-width);
  margin: 0 auto;
}

.page-header {
  margin-bottom: var(--space-3xl);
}

.page-title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-md);
}

.page-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-light);
}

.page-content {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  line-height: 1.8;
}

.breadcrumb {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.breadcrumb a {
  color: var(--color-link);
  text-decoration: none;
}

/* ========================================
   Footer
   ======================================== */

.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-3xl);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer-info {
  flex: 1;
}

.footer-copy,
.footer-author {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.footer-copy {
  margin-bottom: var(--space-xs);
}

.footer-nav {
  display: flex;
  gap: var(--space-lg);
}

.footer-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* ========================================
   Category Page
   ======================================== */

.categories-overview {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
}

.category-section {
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid var(--color-border);
}

.category-section:last-child {
  border-bottom: none;
}

.category-section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
}

.category-section-title {
  font-size: var(--text-2xl);
  margin: 0;
}

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

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

.category-section-count {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.category-posts-preview {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.mini-post a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-md);
  text-decoration: none;
  color: inherit;
  padding: var(--space-md);
  border-radius: 6px;
  transition: background var(--transition);
}

.mini-post a:hover {
  background: var(--color-bg-alt);
}

.mini-post-title {
  font-size: var(--text-base);
  margin: 0;
  color: var(--color-primary);
}

.mini-post-date {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  white-space: nowrap;
}

.view-more {
  display: inline-block;
  margin-top: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-link);
  text-decoration: none;
  font-weight: 500;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
  :root {
    --text-4xl: 2rem;
    --text-3xl: 1.75rem;
    --text-2xl: 1.5rem;
    --space-3xl: 3rem;
  }

  .hamburger {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-link {
    font-size: var(--text-base);
    padding: var(--space-sm) 0;
  }

  .preview-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-nav {
    justify-content: center;
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .hero {
    padding: var(--space-xl) 0;
  }
  
  .site-main {
    padding: var(--space-xl) 0;
  }
}