/* TechFlow Theme - Custom CSS with Light/Dark Mode Support */

/* ==========================================================================
   CSS Custom Properties - Light Mode (Default)
   ========================================================================== */

:root {
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-tertiary: #fafafa;

  /* Text Colors */
  --text-primary: #363636;
  --text-secondary: #4a4a4a;
  --text-muted: #7a7a7a;

  /* Brand Colors */
  --color-primary: #047857;  /* Emerald-700 */
  --color-link: #047857;
  --color-link-hover: #065f46;  /* Emerald-800 */

  /* UI Colors */
  --border-color: #dbdbdb;
  --shadow-color: rgba(10, 10, 10, 0.1);
  --hover-bg: #f5f5f5;
  --focus-ring: rgba(4, 120, 87, 0.25);

  /* Code Block Colors */
  --code-bg: #f5f5f5;
  --code-text: #4a4a4a;
  --code-border: #dbdbdb;

  /* State Colors */
  --success-color: #48c774;
  --danger-color: #f14668;
  --warning-color: #ffdd57;
  --info-color: #3298dc;
}

/* ==========================================================================
   CSS Custom Properties - Dark Mode
   ========================================================================== */

[data-theme="dark"] {
  /* Background Colors */
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #363636;

  /* Text Colors */
  --text-primary: #e0e0e0;
  --text-secondary: #b0b0b0;
  --text-muted: #8a8a8a;

  /* Brand Colors */
  --color-primary: #34d399;  /* Emerald-400 for dark mode */
  --color-link: #34d399;
  --color-link-hover: #6ee7b7;  /* Emerald-300 */

  /* UI Colors */
  --border-color: #404040;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --hover-bg: #363636;
  --focus-ring: rgba(52, 211, 153, 0.25);

  /* Code Block Colors */
  --code-bg: #161616;
  --code-text: #e0e0e0;
  --code-border: #404040;

  /* State Colors */
  --success-color: #58c774;
  --danger-color: #ff6b88;
  --warning-color: #ffd700;
  --info-color: #58a6ff;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Links */
a {
  color: var(--color-link);
  transition: color 0.2s ease;
}

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

/* Code Blocks: see the Typography section below for inline `code` and `pre` rules */

/* Blockquotes */
blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: 1.5em;
  margin-left: 0;
  font-style: italic;
  color: var(--text-secondary);
  background-color: var(--bg-secondary);
  padding: 1em 1.5em;
  border-radius: 0 4px 4px 0;
}

/* Tables */
table {
  border-color: var(--border-color);
}

table thead {
  background-color: var(--bg-secondary);
}

table tbody tr:hover {
  background-color: var(--hover-bg);
}

/* ==========================================================================
   Bulma Component Overrides for Theme Support
   ========================================================================== */

/* Navbar */
.navbar {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.navbar-item {
  color: var(--text-primary);
}

.navbar-item:hover {
  background-color: var(--hover-bg);
  color: var(--text-primary);
}

/* Cards */
.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  box-shadow: 0 2px 4px var(--shadow-color);
}

.card-content {
  color: var(--text-primary);
}

/* Buttons */
.button {
  border-color: var(--border-color);
  transition: all 0.2s ease;
}

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

/* Footer */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  color: var(--text-primary);
}

/* Tags */
.tag {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

/* Box */
.box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  box-shadow: 0 2px 4px var(--shadow-color);
}

/* Message */
.message {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

/* Input, Textarea, Select */
.input,
.textarea,
.select select {
  background-color: var(--bg-primary);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.input:focus,
.textarea:focus,
.select select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.125em var(--focus-ring);
}

/* Horizontal Rule */
hr {
  background-color: var(--border-color);
}

/* ==========================================================================
   Responsive Typography with Fluid Font Scaling
   ========================================================================== */

/* Base font size with responsive scaling using clamp() */
html {
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem); /* 16px to 18px */
}

body {
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Content wrapper for optimal reading width */
.content,
.section .content,
article {
  max-width: 75ch;
}

/* ==========================================================================
   Typography Hierarchy - Headings
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-top: 2em;
  margin-bottom: 0.75em;
  color: var(--text-primary);
}

h1:first-child,
h2:first-child,
h3:first-child,
h4:first-child,
h5:first-child,
h6:first-child {
  margin-top: 0;
}

h1 {
  font-size: clamp(1.75rem, 1.5rem + 1.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  font-weight: 700;
  line-height: 1.25;
}

h3 {
  font-size: clamp(1.3rem, 1.15rem + 0.75vw, 1.75rem);
  font-weight: 600;
}

h4 {
  font-size: clamp(1.15rem, 1.05rem + 0.5vw, 1.5rem);
  font-weight: 600;
}

h5 {
  font-size: clamp(1.05rem, 1rem + 0.25vw, 1.25rem);
  font-weight: 600;
}

h6 {
  font-size: clamp(1rem, 0.975rem + 0.125vw, 1.125rem);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   Body Text and Paragraphs
   ========================================================================== */

p {
  margin-bottom: 1.25em;
  line-height: 1.7;
}

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

/* Lead paragraph */
.lead,
p.lead {
  font-size: 1.15em;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Small text */
small,
.is-small {
  font-size: 0.875em;
  line-height: 1.5;
}

/* Strong and emphasis */
strong {
  font-weight: 600;
  color: var(--text-primary);
}

em {
  font-style: italic;
}

/* ==========================================================================
   Lists - Optimized Spacing
   ========================================================================== */

ul, ol {
  margin-bottom: 1.25em;
  padding-left: 2em;
}

ul li,
ol li {
  margin-bottom: 0.5em;
  line-height: 1.6;
}

ul li:last-child,
ol li:last-child {
  margin-bottom: 0;
}

/* Nested lists */
ul ul,
ol ol,
ul ol,
ol ul {
  margin-top: 0.5em;
  margin-bottom: 0.5em;
}

/* Definition lists */
dl {
  margin-bottom: 1.25em;
}

dt {
  font-weight: 600;
  margin-bottom: 0.25em;
  color: var(--text-primary);
}

dd {
  margin-left: 1.5em;
  margin-bottom: 0.75em;
}

/* ==========================================================================
   Code Blocks - Enhanced with WCAG AA Compliance
   ========================================================================== */

/* Inline code */
code {
  background-color: rgba(4, 120, 87, 0.09);
  color: var(--text-primary);
  border: none;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-family: 'SF Mono', 'Consolas', 'Monaco', 'Menlo', 'Courier New', monospace;
  font-size: 0.875em;
  font-weight: 500;
  white-space: nowrap;
}

[data-theme="dark"] code {
  background-color: rgba(52, 211, 153, 0.14);
}

/* Code blocks */
pre {
  background-color: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 6px;
  padding: 1.25em;
  overflow-x: auto;
  margin-bottom: 1.25em;
  line-height: 1.5;
}

pre code {
  background-color: transparent;
  border: none;
  padding: 0;
  font-size: 0.9em;
  white-space: pre;
}

/* Code block scrollbar styling */
pre::-webkit-scrollbar {
  height: 8px;
}

pre::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

pre::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

pre::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Keyboard input */
kbd {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  box-shadow: 0 2px 0 var(--border-color);
  color: var(--text-primary);
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
  font-size: 0.875em;
  padding: 0.2em 0.4em;
  display: inline-block;
  line-height: 1;
}

/* ==========================================================================
   Blockquotes - Enhanced Styling
   ========================================================================== */

blockquote {
  border-left: 4px solid var(--color-primary);
  padding: 1em 1.5em;
  margin: 1.5em 0;
  font-style: italic;
  color: var(--text-secondary);
  background-color: var(--bg-secondary);
  border-radius: 0 4px 4px 0;
  position: relative;
}

blockquote p {
  margin-bottom: 0.5em;
}

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

blockquote cite {
  display: block;
  font-style: normal;
  font-size: 0.875em;
  margin-top: 0.75em;
  color: var(--text-muted);
}

blockquote cite::before {
  content: "— ";
}

/* ==========================================================================
   Tables - Bulma Enhanced with WCAG Compliance
   ========================================================================== */

table {
  width: 100%;
  margin-bottom: 1.5em;
  border-collapse: collapse;
  border: 1px solid var(--border-color);
}

/* Apply Bulma table classes by default */
table:not([class]) {
  background-color: var(--bg-primary);
}

thead,
thead th {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 600;
  border-bottom: 2px solid var(--border-color);
}

th,
td {
  padding: 0.75em 1em;
  text-align: left;
  border: 1px solid var(--border-color);
  line-height: 1.5;
}

th {
  font-weight: 600;
  color: var(--text-primary);
}

tbody tr {
  background-color: var(--bg-primary);
  transition: background-color 0.15s ease;
}

tbody tr:nth-child(even) {
  background-color: var(--bg-tertiary);
}

tbody tr:hover {
  background-color: var(--hover-bg);
}

/* Responsive tables - wrap in container on mobile */
@media screen and (max-width: 768px) {
  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

/* Bulma table modifiers support */
.table.is-striped tbody tr:not(.is-selected):nth-child(even) {
  background-color: var(--bg-tertiary);
}

.table.is-hoverable tbody tr:not(.is-selected):hover {
  background-color: var(--hover-bg);
}

.table.is-narrow th,
.table.is-narrow td {
  padding: 0.5em 0.75em;
}

.table.is-fullwidth {
  width: 100%;
}

/* ==========================================================================
   Additional Content Elements
   ========================================================================== */

/* Horizontal rule with spacing */
hr {
  margin: 2em 0;
  border: none;
  border-top: 1px solid var(--border-color);
  background-color: transparent;
}

/* Abbreviations */
abbr[title] {
  text-decoration: underline dotted;
  cursor: help;
  border-bottom: none;
}

/* Mark/highlight */
mark {
  background-color: #fff3cd;
  color: #000;
  padding: 0.1em 0.3em;
  border-radius: 2px;
}

[data-theme="dark"] mark {
  background-color: #664d03;
  color: #fff;
}

/* Subscript and superscript */
sub,
sup {
  font-size: 0.75em;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sup {
  top: -0.5em;
}

sub {
  bottom: -0.25em;
}

/* Figure and caption */
figure {
  margin: 1.5em 0;
}

figcaption {
  font-size: 0.875em;
  color: var(--text-muted);
  margin-top: 0.5em;
  text-align: center;
  font-style: italic;
}

/* ==========================================================================
   Theme Toggle Button
   ========================================================================== */

.theme-toggle-button {
  border: none;
  background: transparent !important;
  cursor: pointer;
  padding: 0.5rem;
  margin: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease;
}

.theme-toggle-button:hover {
  transform: rotate(15deg);
  background: transparent !important;
}

.theme-toggle-button:focus {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.theme-toggle-button .icon {
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle-button svg {
  color: var(--text-primary);
  transition: color 0.2s ease;
}

/* Show/hide icons based on theme */
[data-theme="light"] .theme-icon-sun {
  display: none;
}

[data-theme="dark"] .theme-icon-moon {
  display: none;
}

/* Smooth theme transition */
* {
  transition-property: background-color, border-color, color;
  transition-duration: 0.2s;
  transition-timing-function: ease;
}

/* Disable transitions on elements that shouldn't animate */
*:focus,
*:active,
pre,
code,
img,
video {
  transition: none;
}

/* ==========================================================================
   Post Meta Styling
   ========================================================================== */

.post-meta {
  font-size: 0.875em;
  color: var(--text-muted);
  margin-bottom: 1.5em;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5em;
}

.post-meta .separator {
  margin: 0 0.25em;
}

.post-content {
  margin-top: 2em;
}

/* Social icons in footer: see Footer Polish section below for the full styling. */
.social-icons {
  margin: 1.25em 0;
  display: flex;
  justify-content: center;
  gap: 0.75em;
  flex-wrap: wrap;
}

/* ==========================================================================
   Table of Contents Sidebar
   ========================================================================== */

.toc-sidebar {
  position: sticky;
  top: 2rem;
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
}

.toc-sidebar .box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.toc-sidebar .menu-label {
  font-size: 0.875em;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75em;
}

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

.toc-content ul ul {
  padding-left: 1em;
  margin-top: 0.25em;
}

.toc-content li {
  margin-bottom: 0.5em;
}

.toc-content a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875em;
  line-height: 1.5;
  display: block;
  transition: color 0.2s ease, padding-left 0.2s ease, border-left 0.2s ease;
  padding-left: 0.5em;
  border-left: 2px solid transparent;
}

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

/* Active TOC link (current section) */
.toc-content a.is-active {
  color: var(--color-primary);
  font-weight: 600;
  border-left-color: var(--color-primary);
  padding-left: 0.75em;
}

/* Scrollbar for TOC on overflow */
.toc-sidebar::-webkit-scrollbar {
  width: 6px;
}

.toc-sidebar::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

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

.toc-sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ==========================================================================
   Back to Top Button
   ========================================================================== */

/* Override button styles for back-to-top */
#back-to-top {
  /* Styles are applied via JavaScript for dynamic creation */
}

#back-to-top:hover {
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

#back-to-top:focus {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* Dark mode adjustments for back-to-top button */
[data-theme="dark"] #back-to-top {
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] #back-to-top:hover {
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.7);
}

/* ==========================================================================
   Breadcrumb Styling
   ========================================================================== */

.breadcrumb {
  margin-bottom: 2rem;
  font-size: 0.875em;
}

.breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "/";
  padding: 0 0.5em;
  color: var(--text-muted);
}

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

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

.breadcrumb .is-active a {
  color: var(--text-muted);
  pointer-events: none;
}

/* ==========================================================================
   Pagination Enhancements
   ========================================================================== */

.pagination-previous small,
.pagination-next small {
  font-size: 0.75em;
  color: var(--text-muted);
  font-weight: normal;
}

.pagination-link.is-current {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* ==========================================================================
   404 Error Page
   ========================================================================== */

.error-content {
  max-width: 600px;
  margin: 0 auto;
}

.error-content .title.is-1 {
  color: var(--color-primary);
}

/* ==========================================================================
   Category Filter
   ========================================================================== */

.category-filter {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

.category-filter .menu-label {
  font-size: 0.875em;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.category-filter .buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.category-filter button {
  transition: all 0.2s ease;
  cursor: pointer;
}

.category-filter button:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 4px var(--shadow-color);
}

.category-filter button .tag {
  margin-left: 0.25rem;
  background-color: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 0.75em;
}

/* Filtered post animation */
[data-category] {
  transition: opacity 0.3s ease;
}

/* ==========================================================================
   Code Copy Button and Syntax Highlighting
   ========================================================================== */

/* Code block wrapper for positioning context */
.code-block-wrapper {
  position: relative;
  margin-bottom: 1.5em;
}

/* Copy button styling */
.copy-code-button {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 10;
  font-size: 0.75rem;
  padding: 0.375em 0.75em;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  opacity: 0.7;
  font-family: inherit;
}

.copy-code-button:hover {
  opacity: 1;
  transform: translateY(-1px);
}

.copy-code-button:focus {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* Light theme button colors */
[data-theme="light"] .copy-code-button {
  background-color: rgba(255, 255, 255, 0.9);
  color: #4a4a4a;
  border: 1px solid #dbdbdb;
}

[data-theme="light"] .copy-code-button:hover {
  background-color: #ffffff;
  border-color: #b5b5b5;
}

/* Dark theme button colors */
[data-theme="dark"] .copy-code-button {
  background-color: rgba(45, 45, 45, 0.9);
  color: #e0e0e0;
  border: 1px solid #404040;
}

[data-theme="dark"] .copy-code-button:hover {
  background-color: #2d2d2d;
  border-color: #5a5a5a;
}

/* Success state (Copied!) */
.copy-code-button.is-success {
  background-color: var(--success-color) !important;
  color: white !important;
  border-color: var(--success-color) !important;
}

/* Error state (Failed) */
.copy-code-button.is-danger {
  background-color: var(--danger-color) !important;
  color: white !important;
  border-color: var(--danger-color) !important;
}

/* Enhanced Chroma syntax highlighting container */
.chroma,
.highlight {
  position: relative;
  background-color: var(--code-bg);
  border-radius: 6px;
  overflow-x: auto;
}

/* Ensure code blocks within Chroma have proper styling */
.chroma pre,
.highlight pre {
  margin: 0;
  padding: 1.25em;
  background-color: transparent;
  border: none;
}

.chroma code,
.highlight code {
  background-color: transparent;
  border: none;
  padding: 0;
  color: inherit;
}

/* Line numbers in Chroma */
.chroma .lntable {
  border-spacing: 0;
  padding: 0;
  margin: 0;
  border: 0;
  width: 100%;
}

.chroma .lntd {
  vertical-align: top;
  padding: 0;
  margin: 0;
  border: 0;
}

.chroma .lnt,
.chroma .ln {
  margin-right: 0.75em;
  padding: 0 0.5em;
  color: var(--text-muted);
  user-select: none;
}

/* Mobile responsiveness for code blocks */
@media screen and (max-width: 768px) {
  .copy-code-button {
    font-size: 0.7rem;
    padding: 0.3em 0.6em;
    top: 0.4rem;
    right: 0.4rem;
  }

  .code-block-wrapper pre {
    padding: 1em;
  }
}

/* ==========================================================================
   Emerald accent: Bulma is-primary overrides
   ========================================================================== */

.tag.is-primary,
.button.is-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}

.tag.is-primary:hover,
.button.is-primary:hover {
  background-color: var(--color-link-hover);
  border-color: var(--color-link-hover);
  color: #ffffff;
}

[data-theme="dark"] .tag.is-primary,
[data-theme="dark"] .button.is-primary {
  color: #0a1f17;
}

/* Breadcrumb: Bulma styles .is-active a with --bulma-primary by default; lock it to ours. */
.breadcrumb a {
  color: var(--color-link);
}

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

.breadcrumb li.is-active a {
  color: var(--text-muted);
  pointer-events: none;
}

/* ==========================================================================
   Card hover lift (Recent Posts on the homepage)
   ========================================================================== */

.card {
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px var(--shadow-color);
  border-color: var(--color-primary);
}

/* ==========================================================================
   Code block language label
   The label is attached to .code-block-wrapper via copy-code.js, which
   propagates data-lang from the Chroma-emitted <code data-lang="..."> element.
   ========================================================================== */

.code-block-wrapper[data-lang]::before {
  content: attr(data-lang);
  position: absolute;
  top: 0.4rem;
  right: 4.25rem;
  font-size: 0.7em;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
  pointer-events: none;
  user-select: none;
  z-index: 1;
}

.code-block-wrapper[data-lang=""]::before,
.code-block-wrapper[data-lang="text"]::before,
.code-block-wrapper[data-lang="plain"]::before,
.code-block-wrapper[data-lang="plaintext"]::before {
  content: none;
}

@media screen and (max-width: 768px) {
  .code-block-wrapper[data-lang]::before {
    right: 3.75rem;
    font-size: 0.65em;
  }
}

/* ==========================================================================
   Header polish: brand mark, active state, hover underline
   ========================================================================== */

.navbar {
  border-bottom: 1px solid var(--border-color);
  box-shadow: inset 0 -2px 0 0 var(--color-primary);
}

.navbar-item.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5em;
  font-size: 1.05rem;
}

.navbar-item.brand .brand-mark {
  color: var(--color-primary);
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
  font-weight: 700;
  font-size: 0.95em;
  letter-spacing: -0.05em;
  opacity: 0.85;
}

.navbar-item.brand strong {
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.navbar-item.brand:hover {
  background-color: transparent;
}

.navbar-item.brand:hover .brand-mark {
  opacity: 1;
}

/* Nav-item hover/active: animated emerald underline */
.navbar-start .navbar-item {
  position: relative;
}

.navbar-start .navbar-item::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.35rem;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.18s ease;
  pointer-events: none;
}

.navbar-start .navbar-item:hover::after,
.navbar-start .navbar-item.is-active::after {
  transform: scaleX(1);
}

.navbar-start .navbar-item.is-active {
  color: var(--text-primary);
  font-weight: 600;
  background-color: transparent;
}

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

.footer {
  border-top: 1px solid var(--border-color);
  box-shadow: inset 0 2px 0 0 var(--color-primary);
  padding: 3rem 1.5rem 2.5rem;
}

.footer .footer-brand {
  margin-bottom: 0.25em;
}

.footer .footer-brand strong {
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.footer .footer-description {
  color: var(--text-secondary);
  font-size: 0.95em;
}

/* Social icon buttons */
.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 8px;
  color: var(--text-secondary);
  background-color: transparent;
  border: 1px solid var(--border-color);
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.social-icon:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background-color: rgba(4, 120, 87, 0.08);
  transform: translateY(-1px);
}

[data-theme="dark"] .social-icon:hover {
  background-color: rgba(52, 211, 153, 0.12);
}

.social-icon svg {
  display: block;
}

.social-icon-text {
  font-size: 0.75rem;
  padding: 0 0.5em;
}

/* Footer meta line: copyright + credit */
.footer .footer-meta {
  color: var(--text-muted);
  margin-top: 0.5em;
}

.footer .footer-meta .footer-sep {
  margin: 0 0.5em;
  color: var(--text-muted);
  opacity: 0.6;
}

.footer .footer-meta a {
  color: var(--color-link);
}

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

/* On mobile, give the nav-item underline less side padding */
@media screen and (max-width: 768px) {
  .navbar-start .navbar-item::after {
    left: 0.5rem;
    right: 0.5rem;
  }
}