/* ===========================================
   MODERN DARK/LIGHT THEME
   A sleek, professional blog theme
   =========================================== */

/* ===========================================
   CSS CUSTOM PROPERTIES - DARK THEME (default)
   =========================================== */
:root,
[data-theme="dark"] {
  /* Background colors */
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-tertiary: #18181b;
  --bg-elevated: #1f1f23;
  --bg-hover: rgba(255, 255, 255, 0.05);

  /* Text colors - brighter for better readability */
  --text-primary: #f4f4f5;
  --text-secondary: #e4e4e7;
  --text-muted: #b4b4bc;

  /* Accent colors */
  --accent-primary: #3b82f6;
  --accent-secondary: #60a5fa;
  --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);

  /* Border colors */
  --border-primary: #27272a;
  --border-secondary: #3f3f46;

  /* Code block colors */
  --code-bg: #0d1117;
  --code-header-bg: #161b22;
  --code-border: #30363d;
  --code-text: #e6edf3;

  /* Syntax highlighting */
  --syn-keyword: #ff7b72;
  --syn-string: #a5d6ff;
  --syn-number: #79c0ff;
  --syn-function: #d2a8ff;
  --syn-comment: #8b949e;
  --syn-tag: #7ee787;
  --syn-attr: #79c0ff;
  --syn-builtin: #ffa657;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);

  /* Inline code */
  --inline-code-bg: rgba(110, 118, 129, 0.25);
  --inline-code-text: #79c0ff;
}

/* ===========================================
   CSS CUSTOM PROPERTIES - LIGHT THEME
   =========================================== */
[data-theme="light"] {
  /* Background colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-elevated: #ffffff;
  --bg-hover: rgba(0, 0, 0, 0.04);

  /* Text colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  /* Accent colors */
  --accent-primary: #2563eb;
  --accent-secondary: #3b82f6;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);

  /* Border colors */
  --border-primary: #e2e8f0;
  --border-secondary: #cbd5e1;

  /* Code block colors - keep dark for readability */
  --code-bg: #1e293b;
  --code-header-bg: #0f172a;
  --code-border: #334155;
  --code-text: #e2e8f0;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* Inline code */
  --inline-code-bg: #f1f5f9;
  --inline-code-text: #0369a1;
}

/* ===========================================
   BASE STYLES
   =========================================== */
html {
  scroll-behavior: smooth;
  overflow-y: scroll; /* Always show scrollbar to prevent layout shift between pages */
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ===========================================
   TYPOGRAPHY
   =========================================== */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

h1 { font-size: 2.25rem; letter-spacing: -0.025em; }
h2 { font-size: 1.75rem; letter-spacing: -0.02em; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

/* ===========================================
   PAGE HEADERS - Unified styling for all pages
   =========================================== */
/* Target first h1 in main content areas for consistent page headers */
.posts-page > h1:first-child,
.tags-page > h1:first-child,
.post-content > h1:first-child,
.page-content .wrapper > h1:first-child,
.page-content .wrapper > .post > h1:first-child,
.page-content .wrapper > article > h1:first-child {
  margin-top: 0 !important;
  margin-bottom: 2rem !important;
  padding-bottom: 1rem;
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  border-bottom: 3px solid var(--accent-primary);
}

/* Minima page layout header fix */
.post-header {
  margin-bottom: 0 !important;
}

.post-header .post-title {
  margin-top: 0 !important;
  margin-bottom: 2rem !important;
  padding-bottom: 1rem;
  font-size: 2.25rem !important;
  font-weight: 800 !important;
  letter-spacing: -0.025em;
  border-bottom: 3px solid var(--accent-primary);
}

/* Remove extra top padding from page content to prevent shifts */
.post-content {
  margin-top: 0;
}

p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

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

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

/* Article links */
article a:not(.site-title):not([class]) {
  text-decoration: underline;
  text-decoration-color: var(--accent-primary);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

article a:not(.site-title):not([class]):hover {
  text-decoration-thickness: 2px;
}

::selection {
  background: rgba(59, 130, 246, 0.3);
}

/* ===========================================
   LAYOUT - WRAPPER
   =========================================== */
.wrapper {
  max-width: 850px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.page-content {
  padding: 2rem 0 4rem;
  min-height: calc(100vh - 200px);
}

/* ===========================================
   HEADER
   =========================================== */
.site-header {
  background: var(--bg-secondary) !important;
  border-bottom: 1px solid var(--border-primary) !important;
  position: sticky !important;
  top: 0 !important;
  z-index: 100 !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-header {
  position: relative !important;
  padding: 1rem 0 !important;
}

.site-header .wrapper {
  display: none !important;
}

.site-title {
  position: absolute !important;
  left: 2rem !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  font-weight: 800 !important;
  font-size: 1.25rem !important;
  color: var(--text-primary) !important;
  letter-spacing: -0.02em !important;
}

.site-title:hover {
  color: var(--accent-primary) !important;
}

.site-logo {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-nav-wrapper {
  display: flex !important;
  justify-content: space-between !important;
  align-items: center !important;
  max-width: 850px !important;
  width: 100% !important;
  margin: 0 auto !important;
  padding: 0 1.5rem !important;
}

/* ===========================================
   NAVIGATION - Home icon and nav links
   =========================================== */
.site-nav-left {
  display: flex !important;
  align-items: center !important;
  gap: 0.25rem !important;
}

.nav-home {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.nav-home:hover {
  color: var(--accent-primary);
  background: var(--bg-hover);
}

.nav-home svg {
  width: 20px;
  height: 20px;
}

.nav-trigger {
  display: none !important;
}

.menu-toggle {
  display: none;
  cursor: pointer;
  color: var(--text-primary);
}

.nav-links {
  display: flex !important;
  align-items: center !important;
  gap: 0.25rem !important;
}

.page-link {
  display: inline-block !important;
  padding: 0.5rem 0.875rem !important;
  color: var(--text-secondary) !important;
  font-weight: 500 !important;
  font-size: 0.9rem !important;
  border-radius: 6px !important;
  transition: all 0.2s ease !important;
  line-height: 1.5 !important;
  margin: 0 !important;
  text-decoration: none !important;
}

.page-link:hover {
  color: var(--text-primary) !important;
  background: var(--bg-hover) !important;
}

.page-link[aria-current="page"],
.page-link.active {
  color: var(--accent-primary) !important;
  background: rgba(59, 130, 246, 0.1) !important;
}

/* Mobile navigation */
@media (max-width: 768px) {
  .site-header {
    padding: 1rem !important;
  }

  .site-title {
    position: relative !important;
    left: 0 !important;
    top: 0 !important;
    transform: none !important;
    font-size: 1rem !important;
    display: block !important;
    margin-bottom: 0.5rem !important;
  }

  .header-nav-wrapper {
    padding: 0 !important;
  }

  .menu-toggle {
    display: flex !important;
    padding: 0.5rem;
    z-index: 10;
  }

  .nav-links {
    position: absolute !important;
    top: 100% !important;
    right: 0 !important;
    left: 0 !important;
    flex-direction: column !important;
    background: var(--bg-secondary) !important;
    border-bottom: 1px solid var(--border-primary) !important;
    padding: 1rem !important;
    gap: 0.5rem !important;
    display: none !important;
    box-shadow: var(--shadow-lg) !important;
  }

  .nav-trigger:checked ~ .nav-links {
    display: flex !important;
  }

  .page-link {
    width: 100% !important;
    text-align: center !important;
    padding: 0.75rem !important;
  }
}

/* ===========================================
   THEME TOGGLE
   =========================================== */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border-secondary);
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  margin-left: 0.5rem;
}

.theme-toggle:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(59, 130, 246, 0.1);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

/* Dark mode: show sun, hide moon */
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }

/* Light mode: show moon, hide sun */
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }

/* ===========================================
   POST LIST
   =========================================== */
.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list li {
  padding: 1.5rem;
  margin: 0 -1.5rem;
  border-radius: 12px;
  transition: background-color 0.2s ease;
}

.post-list li:hover {
  background: var(--bg-hover);
}

.post-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-family: ui-monospace, monospace;
}

.post-meta .p-author {
  color: #f43f5e;
  font-weight: 600;
}

.post-link {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.5rem;
}

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

.post-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===========================================
   ARCHIVE LIST
   =========================================== */
.archive-list {
  list-style: none;
  padding: 0;
}

.archive-item {
  display: flex;
  gap: 1.5rem;
  padding: 0.75rem 1rem;
  margin: 0 -1rem;
  border-radius: 8px;
  align-items: center;
  transition: background-color 0.2s ease;
}

.archive-item:hover {
  background: var(--bg-hover);
}

.archive-item.hidden {
  display: none;
}

.archive-item time {
  font-family: ui-monospace, monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-shrink: 0;
  min-width: 5.5rem;
}

.archive-item a {
  flex: 1;
  color: var(--text-primary);
  font-weight: 500;
}

.archive-item a:hover {
  color: var(--accent-primary);
}

.year-heading {
  color: var(--accent-primary);
  font-size: 1.5rem;
  margin-top: 3rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-primary);
}

.month-heading {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

/* ===========================================
   SERIES BADGE (unified component)
   =========================================== */
.post-series-wrapper {
  margin-bottom: 1rem;
}

.series-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.65rem 0.35rem 0.5rem;
  background: #1e1e2e;
  border: 1px solid #313244;
  border-radius: 6px;
  font-size: 0.7rem;
  white-space: nowrap;
}

[data-theme="light"] .series-badge {
  background: #f1f5f9;
  border-color: #e2e8f0;
}

.series-badge__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  background: #10b981;
  border-radius: 4px;
}

.series-badge__icon svg {
  width: 11px;
  height: 11px;
  stroke: #fff;
  stroke-width: 2.5;
}

.series-badge__name {
  color: #cdd6f4;
  font-weight: 600;
  letter-spacing: 0.01em;
}

[data-theme="light"] .series-badge__name {
  color: #1e293b;
}

.series-badge__part {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 18px;
  padding: 0 0.4rem;
  background: #10b981;
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  border-radius: 4px;
}

/* Large variant for article pages */
.series-badge--large {
  padding: 0.5rem 0.85rem 0.5rem 0.65rem;
  font-size: 0.8rem;
  gap: 0.5rem;
  border-radius: 8px;
}

.series-badge--large .series-badge__icon {
  width: 24px;
  height: 24px;
  border-radius: 6px;
}

.series-badge--large .series-badge__icon svg {
  width: 14px;
  height: 14px;
}

.series-badge--large .series-badge__part {
  min-width: 28px;
  height: 22px;
  padding: 0 0.5rem;
  font-size: 0.75rem;
  border-radius: 5px;
}

/* ===========================================
   FILTER BUTTONS
   =========================================== */
.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.filter-btn {
  font-family: ui-monospace, monospace;
  font-size: 0.8rem;
  padding: 0.5rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 20px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.filter-btn.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
}

/* ===========================================
   CODE BLOCKS & SYNTAX HIGHLIGHTING
   =========================================== */
div.highlighter-rouge,
div.highlight {
  position: relative;
  margin: 2rem 0.5rem;
  border-radius: 12px;
  overflow: hidden;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  box-shadow: var(--shadow-md);
}

@media (min-width: 768px) {
  div.highlighter-rouge,
  div.highlight {
    margin: 2rem 1rem;
  }
}

/* Language label header */
div.highlighter-rouge::before {
  content: 'code';
  display: block;
  padding: 0.75rem 2.5rem;
  background: var(--code-header-bg);
  border-bottom: 1px solid var(--code-border);
  font-family: ui-monospace, monospace;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #7d8590;
}

/* Language-specific labels */
div.language-bash::before,
div.language-shell::before,
div.language-sh::before,
div.language-zsh::before,
div.language-console::before { content: 'terminal'; color: #3fb950; }

div.language-yaml::before,
div.language-yml::before { content: 'yaml'; color: #a371f7; }

div.language-python::before,
div.language-py::before { content: 'python'; color: #d29922; }

div.language-javascript::before,
div.language-js::before { content: 'javascript'; color: #f7df1e; }

div.language-typescript::before,
div.language-ts::before { content: 'typescript'; color: #3178c6; }

div.language-json::before { content: 'json'; color: #d29922; }
div.language-html::before { content: 'html'; color: #e34c26; }

div.language-css::before,
div.language-scss::before,
div.language-sass::before { content: 'css'; color: #264de4; }

div.language-ruby::before,
div.language-rb::before { content: 'ruby'; color: #cc342d; }

div.language-go::before { content: 'go'; color: #00add8; }
div.language-rust::before { content: 'rust'; color: #dea584; }

div.language-dockerfile::before,
div.language-docker::before { content: 'dockerfile'; color: #2496ed; }

div.language-sql::before { content: 'sql'; color: #e38c00; }

div.language-hcl::before,
div.language-terraform::before,
div.language-tf::before { content: 'terraform'; color: #7b42bc; }

div.language-markdown::before,
div.language-md::before { content: 'markdown'; color: #7d8590; }

div.language-plaintext::before,
div.language-text::before { content: 'output'; color: #7d8590; }

div.language-c::before { content: 'c'; color: #555555; }
div.language-cpp::before { content: 'c++'; color: #f34b7d; }
div.language-java::before { content: 'java'; color: #b07219; }
div.language-kotlin::before { content: 'kotlin'; color: #a97bff; }
div.language-swift::before { content: 'swift'; color: #f05138; }

/* Inner highlight div */
div.highlighter-rouge .highlight {
  margin: 0;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
}

div.highlighter-rouge .highlight::before {
  display: none;
}

/* Pre element inside code blocks */
div.highlighter-rouge pre,
div.highlight pre {
  margin: 0 !important;
  padding: 1.75rem 2.5rem !important;
  overflow-x: auto !important;
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, monospace !important;
  font-size: 0.85rem !important;
  line-height: 1.8 !important;
  background: transparent !important;
  color: var(--code-text) !important;
  tab-size: 2;
  border: none !important;
  border-radius: 0 !important;
}

/* Ensure code element doesn't override padding */
div.highlighter-rouge pre code,
div.highlight pre code {
  display: block;
  padding: 0 !important;
  margin: 0;
  background: none !important;
  border: none !important;
  border-radius: 0;
  color: inherit;
  font-size: inherit;
  font-weight: normal;
  white-space: pre;
}


/* Scrollbar styling */
div.highlighter-rouge pre::-webkit-scrollbar {
  height: 8px;
  background: transparent;
}

div.highlighter-rouge pre::-webkit-scrollbar-track {
  background: #21262d;
  border-radius: 4px;
}

div.highlighter-rouge pre::-webkit-scrollbar-thumb {
  background: #484f58;
  border-radius: 4px;
}

div.highlighter-rouge pre::-webkit-scrollbar-thumb:hover {
  background: #6e7681;
}

/* ===========================================
   SYNTAX HIGHLIGHTING TOKENS
   =========================================== */

/* Comments */
.highlight .c,
.highlight .c1,
.highlight .cm,
.highlight .cs,
.highlight .cp,
.highlight .ch { color: var(--syn-comment); font-style: italic; }

/* Keywords */
.highlight .k,
.highlight .kd,
.highlight .kn,
.highlight .kp,
.highlight .kr,
.highlight .kt,
.highlight .kc,
.highlight .kv { color: var(--syn-keyword); font-weight: 500; }

/* Strings */
.highlight .s,
.highlight .s1,
.highlight .s2,
.highlight .sb,
.highlight .sc,
.highlight .sd,
.highlight .se,
.highlight .sh,
.highlight .si,
.highlight .sx,
.highlight .sr,
.highlight .dl { color: var(--syn-string); }

/* Numbers */
.highlight .m,
.highlight .mb,
.highlight .mf,
.highlight .mh,
.highlight .mi,
.highlight .mo,
.highlight .mx,
.highlight .il { color: var(--syn-number); }

/* Names */
.highlight .n { color: var(--code-text); }
.highlight .na { color: var(--syn-attr); }
.highlight .nb { color: var(--syn-builtin); }
.highlight .nc { color: var(--syn-builtin); font-weight: 500; }
.highlight .nd { color: var(--syn-function); }
.highlight .ne { color: var(--syn-builtin); }
.highlight .nf { color: var(--syn-function); font-weight: 500; }
.highlight .ni { color: var(--code-text); }
.highlight .nl { color: var(--syn-attr); }
.highlight .nn { color: var(--syn-builtin); }
.highlight .no { color: var(--syn-attr); }
.highlight .nt { color: var(--syn-tag); }
.highlight .nv { color: var(--syn-builtin); }
.highlight .bp { color: var(--syn-attr); }
.highlight .vc,
.highlight .vg,
.highlight .vi,
.highlight .vm { color: var(--syn-builtin); }

/* Operators */
.highlight .o,
.highlight .ow { color: var(--syn-keyword); }

/* Punctuation */
.highlight .p,
.highlight .pi { color: var(--code-text); }

/* Diff */
.highlight .gd { color: #ffa198; background: rgba(248, 81, 73, 0.15); }
.highlight .gi { color: #7ee787; background: rgba(63, 185, 80, 0.15); }
.highlight .ge { font-style: italic; }
.highlight .gs { font-weight: bold; }
.highlight .gh { color: var(--syn-number); font-weight: bold; }
.highlight .gu { color: var(--syn-comment); }
.highlight .gp { color: var(--syn-tag); font-weight: 600; }

/* Errors */
.highlight .err { color: #ffa198; background: transparent; }
.highlight .w { color: var(--code-text); }

/* ===========================================
   COPY BUTTON FOR CODE BLOCKS
   =========================================== */
.code-copy-btn {
  position: absolute;
  top: 8px;
  right: 10px;
  padding: 6px 12px;
  font-family: ui-monospace, monospace;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: #21262d;
  color: #7d8590;
  border: 1px solid #30363d;
  border-radius: 6px;
  cursor: pointer;
  opacity: 0;
  transition: all 0.2s ease;
}

.code-copy-btn:hover {
  background: #30363d;
  color: #e6edf3;
}

div.highlighter-rouge:hover .code-copy-btn {
  opacity: 1;
}

.code-copy-btn.copied {
  color: #3fb950;
  border-color: #3fb950;
}

/* ===========================================
   INLINE CODE
   =========================================== */
:not(pre) > code {
  padding: 0.2em 0.45em;
  background: var(--inline-code-bg);
  border-radius: 6px;
  color: var(--inline-code-text);
  font-size: 0.875em;
  font-weight: 500;
  font-family: ui-monospace, monospace;
}

/* ===========================================
   BLOCKQUOTES
   =========================================== */
blockquote {
  border-left: 4px solid var(--accent-primary);
  background: var(--bg-tertiary);
  border-radius: 0 12px 12px 0;
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  color: var(--text-secondary);
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* ===========================================
   TABLES - Modern card-style design
   =========================================== */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1.75rem 0;
  font-size: 0.875rem;
  background: linear-gradient(145deg, rgba(30, 34, 44, 0.7), rgba(20, 24, 32, 0.9));
  border-radius: 12px;
  overflow: hidden;
  border-left: 3px solid var(--accent-primary);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 4px 20px rgba(0, 0, 0, 0.4),
    0 1px 3px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

[data-theme="light"] table {
  background: linear-gradient(145deg, #ffffff, #f8fafc);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.05),
    0 4px 20px rgba(0, 0, 0, 0.08),
    0 1px 3px rgba(0, 0, 0, 0.05);
}

thead {
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.15), rgba(59, 130, 246, 0.05));
}

[data-theme="light"] thead {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.1), rgba(37, 99, 235, 0.03));
}

th {
  font-weight: 700 !important;
  font-size: 0.7rem !important;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #60a5fa !important;
  padding: 0.875rem 1.25rem !important;
  text-align: left !important;
  border-bottom: 2px solid rgba(59, 130, 246, 0.3) !important;
  position: relative;
}

[data-theme="light"] th {
  color: #2563eb !important;
  border-bottom: 2px solid rgba(37, 99, 235, 0.25) !important;
}

td {
  padding: 1rem 1.25rem !important;
  color: #c9d1d9 !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04) !important;
  vertical-align: middle;
  line-height: 1.5;
  transition: all 0.15s ease;
}

[data-theme="light"] td {
  color: #334155 !important;
  border-bottom: 1px solid rgba(0, 0, 0, 0.04) !important;
}

/* Last row no border */
tbody tr:last-child td {
  border-bottom: none !important;
}

/* Alternating rows - subtle */
tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.015);
}

[data-theme="light"] tbody tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.015);
}

/* Hover effect */
tbody tr {
  transition: all 0.2s ease;
}

tbody tr:hover {
  background: rgba(59, 130, 246, 0.08) !important;
}

tbody tr:hover td {
  color: #ffffff !important;
}

[data-theme="light"] tbody tr:hover td {
  color: #0f172a !important;
}

/* Table links */
table a {
  color: #58a6ff !important;
  text-decoration: none !important;
  font-weight: 500;
  transition: all 0.15s ease;
}

table a:hover {
  color: #79b8ff !important;
  text-decoration: underline !important;
}

[data-theme="light"] table a {
  color: #2563eb !important;
}

[data-theme="light"] table a:hover {
  color: #1d4ed8 !important;
}

/* Code in tables */
table code {
  background: rgba(110, 118, 129, 0.15) !important;
  padding: 0.25rem 0.5rem;
  border-radius: 5px;
  font-size: 0.8rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  color: #7ee787 !important;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

[data-theme="light"] table code {
  background: rgba(0, 0, 0, 0.05) !important;
  color: #16a34a !important;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

/* Strong text in tables */
table strong {
  color: #ffffff !important;
  font-weight: 600;
}

[data-theme="light"] table strong {
  color: #0f172a !important;
}

/* First column styling */
td:first-child {
  font-weight: 500;
}

/* ===========================================
   HORIZONTAL RULE
   =========================================== */
hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-secondary), transparent);
  margin: 3rem 0;
}

/* ===========================================
   IMAGES
   =========================================== */
article img {
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  max-width: 100%;
  height: auto;
}

/* ===========================================
   FOOTER
   =========================================== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
  padding: 3rem 0;
  margin-top: 4rem;
}

.footer-heading {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.footer-col-wrapper {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}

.footer-col {
  flex: 1;
  min-width: 200px;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-list li {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.site-footer a {
  color: var(--text-secondary);
}

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

.social-media-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.social-media-list li {
  display: inline-block;
  margin-right: 1rem;
}

.social-media-list a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.social-media-list svg {
  width: 18px;
  height: 18px;
  fill: var(--text-muted);
  transition: fill 0.2s ease;
}

.social-media-list a:hover svg {
  fill: var(--accent-primary);
}

/* ===========================================
   SERIES NAVIGATION BOX
   =========================================== */
.series-navigation {
  margin-top: 3rem;
  padding: 1.5rem;
  background: var(--bg-tertiary);
  border-radius: 12px;
  border-left: 4px solid var(--accent-primary);
}

.series-navigation h3 {
  margin-top: 0;
  font-size: 1rem;
  color: var(--text-primary);
}

.series-navigation ul {
  margin-bottom: 0;
  padding-left: 1.25rem;
}

.series-navigation li {
  margin: 0.5rem 0;
  color: var(--text-secondary);
}

.series-navigation li.current {
  font-weight: 600;
  color: var(--accent-primary);
}

.series-navigation li.current a {
  color: var(--accent-primary);
}

/* ===========================================
   TAGS
   =========================================== */
.post-tags {
  margin: 0.75rem 0 1.25rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.tag:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* ===========================================
   ARTICLE HEADER
   =========================================== */
article header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-primary);
}

article header h1 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

article header mark {
  background: var(--accent-gradient);
  color: #fff;
  padding: 0.3rem 0.9rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.85rem;
}

/* ===========================================
   MERMAID DIAGRAMS
   =========================================== */
.mermaid {
  background: var(--bg-tertiary);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 1.75rem 0;
  border: 1px solid var(--border-primary);
}

/* ===========================================
   FOCUS STYLES
   =========================================== */
a:focus-visible,
button:focus-visible,
.filter-btn:focus-visible,
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* ===========================================
   TRANSITIONS
   =========================================== */
a, button, .filter-btn, .theme-toggle, .tag, .archive-item, .post-list li {
  transition: all 0.2s ease;
}

/* Smooth theme transition */
body,
.site-header,
.site-footer,
.series-navigation,
blockquote,
table,
.mermaid,
.filter-btn,
.series-indicator {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

/* ===========================================
   READING PROGRESS BAR - Left side indicator
   =========================================== */
.reading-progress-container {
  display: none;
}

@media (min-width: 1300px) {
  .reading-progress-container {
    display: block;
    position: fixed;
    left: calc((100vw - 850px) / 2 - 40px);
    top: 100px;
    width: 3px;
    height: calc(100vh - 200px);
    background: var(--border-primary);
    border-radius: 3px;
    z-index: 50;
  }

  .reading-progress-bar {
    width: 100%;
    height: 0%;
    background: var(--accent-primary);
    border-radius: 3px;
    transition: height 0.1s ease-out;
  }
}

/* ===========================================
   BACK TO TOP BUTTON
   =========================================== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: 50%;
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.2s ease;
  z-index: 100;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* Position back-to-top in left margin on large screens */
@media (min-width: 1300px) {
  .back-to-top {
    left: calc((100vw - 850px) / 2 - 60px);
    bottom: auto;
    top: calc(100vh - 100px);
  }
}

/* ===========================================
   TABLE OF CONTENTS - Right sidebar navigation
   =========================================== */
.post-layout-wrapper {
  position: relative;
}

.toc-nav {
  display: none;
}

/* Show TOC only on large screens - positioned in right margin */
@media (min-width: 1300px) {
  .toc-nav {
    display: block;
    position: fixed;
    top: 100px;
    right: calc((100vw - 850px) / 2 - 220px);
    width: 200px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    padding-right: 0.5rem;
  }

  .toc-header {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-primary);
  }

  .toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .toc-list li {
    margin: 0;
    padding: 0;
  }

  .toc-list a {
    display: block;
    padding: 0.4rem 0;
    padding-left: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all 0.15s ease;
    line-height: 1.4;
  }

  .toc-list a:hover {
    color: var(--text-primary);
    border-left-color: var(--border-secondary);
  }

  .toc-list a.active {
    color: var(--accent-primary);
    border-left-color: var(--accent-primary);
    font-weight: 500;
  }

  /* Custom scrollbar for TOC */
  .toc-nav::-webkit-scrollbar {
    width: 3px;
  }

  .toc-nav::-webkit-scrollbar-track {
    background: transparent;
  }

  .toc-nav::-webkit-scrollbar-thumb {
    background: var(--border-secondary);
    border-radius: 3px;
  }
}

/* Hide TOC in print */
@media print {
  .toc-nav {
    display: none !important;
  }
}

/* ===========================================
   HEADER RIGHT SECTION
   =========================================== */
.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ===========================================
   NAV SEARCH BAR
   =========================================== */
.nav-search {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-muted);
  pointer-events: none;
  z-index: 1;
}

.nav-search-input {
  width: 160px;
  padding: 0.5rem 0.75rem 0.5rem 2rem;
  font-size: 0.85rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 8px;
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.nav-search-input:focus {
  outline: none;
  width: 220px;
  border-color: var(--accent-primary);
  background: var(--bg-elevated);
}

.nav-search-input::placeholder {
  color: var(--text-muted);
}

.nav-search-results {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 320px;
  max-height: 400px;
  overflow-y: auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border-secondary);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  display: none;
  z-index: 200;
}

.nav-search-results.visible {
  display: block;
}

.nav-search-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 1rem;
  text-decoration: none;
  border-bottom: 1px solid var(--border-primary);
  transition: background-color 0.15s ease;
}

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

.nav-search-item:hover {
  background: var(--bg-hover);
}

.nav-search-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.nav-search-item:hover .nav-search-title {
  color: var(--accent-primary);
}

.nav-search-date {
  font-family: ui-monospace, monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.nav-search-empty {
  padding: 1rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.nav-search-more {
  display: block;
  padding: 0.75rem 1rem;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent-primary);
  text-decoration: none;
  border-top: 1px solid var(--border-primary);
  background: var(--bg-tertiary);
  transition: background-color 0.15s ease;
}

.nav-search-more:hover {
  background: var(--bg-hover);
}

/* Mobile: hide search bar, show simpler version */
@media (max-width: 768px) {
  .nav-search-input {
    width: 120px;
  }

  .nav-search-input:focus {
    width: 160px;
  }

  .nav-search-results {
    width: 280px;
    right: -40px;
  }
}

@media (max-width: 480px) {
  .nav-search {
    display: none;
  }
}

/* ===========================================
   SOCIAL SHARING BUTTONS
   =========================================== */
.post-sharing {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-primary);
}

.share-buttons {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.share-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-right: 0.5rem;
}

.share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border-primary);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.share-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.share-btn svg {
  width: 18px;
  height: 18px;
}

/* Twitter/X button */
.share-twitter:hover {
  color: #fff;
  background: #000;
  border-color: #000;
}

[data-theme="light"] .share-twitter:hover {
  color: #fff;
  background: #14171a;
  border-color: #14171a;
}

/* LinkedIn button */
.share-linkedin:hover {
  color: #fff;
  background: #0077b5;
  border-color: #0077b5;
}

/* Copy Link button */
.share-copy:hover {
  color: #fff;
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.share-copy.copied {
  color: #fff;
  background: #22c55e;
  border-color: #22c55e;
}

/* ===========================================
   PRINT STYLES
   =========================================== */
@media print {
  .site-nav,
  .theme-toggle,
  .nav-search,
  .code-copy-btn,
  .site-footer,
  .toc-nav,
  .post-sharing {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }
}