/* ===== MozoWiki Blog - AI-Friendly Static Blog ===== */
/* Design: Clean, semantic, fast-loading, AI-crawler optimized */

:root {
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-bg-card: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #6c757d;
  --color-text-muted: #adb5bd;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-border: #e5e7eb;
  --color-border-light: #f0f0f0;
  --color-accent: #f59e0b;
  --color-success: #10b981;
  --color-tag-bg: #f1f5f9;
  --color-tag-text: #475569;
  --color-code-bg: #f6f8fa;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1200px;
  --content-width: 780px;
  --transition: 0.2s ease;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-card: #1e293b;
    --color-text: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-primary: #60a5fa;
    --color-primary-hover: #93bbfd;
    --color-primary-light: #1e3a5f;
    --color-border: #334155;
    --color-border-light: #1e293b;
    --color-tag-bg: #334155;
    --color-tag-text: #cbd5e1;
    --color-code-bg: #1e293b;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.4);
  }
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ===== Layout ===== */
.site-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  background: var(--color-bg);
  z-index: 100;
  backdrop-filter: blur(8px);
  background: rgba(255,255,255,0.9);
}
@media (prefers-color-scheme: dark) {
  .site-header { background: rgba(15,23,42,0.9); }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.site-logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.site-logo:hover { color: var(--color-primary); }

.site-nav { display: flex; align-items: center; gap: 24px; }
.site-nav a {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}
.site-nav a:hover, .site-nav a.active { color: var(--color-primary); }

.nav-search {
  position: relative;
  display: flex;
  align-items: center;
}
.nav-search input {
  width: 200px;
  padding: 8px 12px 8px 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-secondary);
  color: var(--color-text);
  font-size: 0.9rem;
  outline: none;
  transition: all var(--transition);
}
.nav-search input:focus {
  border-color: var(--color-primary);
  width: 280px;
  box-shadow: 0 0 0 3px var(--color-primary-light);
}
.nav-search .search-icon {
  position: absolute;
  left: 10px;
  color: var(--color-text-muted);
  width: 18px;
  height: 18px;
}

/* ===== Main Content ===== */
.main-content {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding: 40px 0;
}

@media (max-width: 900px) {
  .main-content {
    grid-template-columns: 1fr;
  }
}

/* ===== Post List (Home) ===== */
.post-list { list-style: none; }

.post-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-bottom: 20px;
  background: var(--color-bg-card);
  transition: all var(--transition);
}
.post-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.post-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.post-card-title a { color: var(--color-text); }
.post-card-title a:hover { color: var(--color-primary); }

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}
.post-card-meta .meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.post-card-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  transition: all var(--transition);
}
.tag:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* ===== Sidebar ===== */
.sidebar { position: sticky; top: 80px; align-self: start; }

.sidebar-section {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
  background: var(--color-bg-card);
}

.sidebar-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-primary);
}

.category-list { list-style: none; }
.category-list li { margin-bottom: 8px; }
.category-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.category-list a:hover {
  background: var(--color-bg-secondary);
  color: var(--color-primary);
}
.category-count {
  background: var(--color-tag-bg);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }

/* ===== Single Post ===== */
.post-article {
  max-width: var(--content-width);
}

.post-header { margin-bottom: 32px; }

.post-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

/* Article content */
.post-content {
  font-size: 1.05rem;
  line-height: 1.85;
}

.post-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 2.5em 0 0.8em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
}

.post-content h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 2em 0 0.6em;
}

.post-content p { margin-bottom: 1.2em; }

.post-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding: 12px 20px;
  margin: 1.5em 0;
  background: var(--color-bg-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.post-content pre {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  overflow-x: auto;
  margin: 1.5em 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
}

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

.post-content ul, .post-content ol {
  margin: 1em 0;
  padding-left: 1.5em;
}
.post-content li { margin-bottom: 0.4em; }

.post-content img {
  border-radius: var(--radius-md);
  margin: 1.5em 0;
  box-shadow: var(--shadow-sm);
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.95rem;
}
.post-content th, .post-content td {
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
}
.post-content th {
  background: var(--color-bg-secondary);
  font-weight: 600;
}

/* ===== Post Footer ===== */
.post-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.post-tags-section {
  margin-bottom: 24px;
}
.post-tags-section .tag { margin-right: 6px; }

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}
.post-nav a {
  display: block;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.post-nav a:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.post-nav .nav-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}
.post-nav .nav-title {
  font-weight: 600;
  color: var(--color-text);
}

/* ===== Comments ===== */
.comments-section {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.comments-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin: 40px 0;
}
.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}
.pagination a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.pagination .current {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ===== Category/Tag Page ===== */
.archive-header {
  margin-bottom: 32px;
}
.archive-title {
  font-size: 1.8rem;
  font-weight: 700;
}
.archive-desc {
  color: var(--color-text-secondary);
  margin-top: 8px;
}

/* ===== Search Results ===== */
.search-results-container {
  min-height: 400px;
}
.search-result-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border-light);
}
.search-result-item:last-child { border-bottom: none; }
.search-result-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.search-result-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}
.search-result-excerpt mark {
  background: var(--color-accent);
  color: #000;
  padding: 1px 3px;
  border-radius: 2px;
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  margin-top: 60px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}
.site-footer a { color: var(--color-text-secondary); }

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb .separator { color: var(--color-text-muted); }

/* ===== Reading Progress ===== */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--color-primary);
  z-index: 1000;
  transition: width 0.1s linear;
}

/* ===== TOC (Table of Contents) ===== */
.toc {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 20px;
  background: var(--color-bg-card);
}
.toc-title {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}
.toc-list { list-style: none; }
.toc-list li { margin-bottom: 6px; }
.toc-list a {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  display: block;
  padding: 2px 0;
  border-left: 2px solid transparent;
  padding-left: 10px;
  transition: all var(--transition);
}
.toc-list a:hover, .toc-list a.active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}
.toc-list .toc-h3 { padding-left: 24px; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .header-inner { flex-wrap: wrap; gap: 12px; }
  .site-nav { gap: 16px; }
  .nav-search input { width: 160px; }
  .nav-search input:focus { width: 200px; }
  .post-title { font-size: 1.6rem; }
  .post-nav { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}

/* ===== Print ===== */
@media print {
  .site-header, .site-footer, .sidebar, .comments-section,
  .post-nav, .reading-progress, .nav-search { display: none; }
  .main-content { grid-template-columns: 1fr; }
  .post-content { font-size: 12pt; }
}