/* ==========================================================================
   Design System: ResponsibleTechLabs (Vanilla CSS)
   ========================================================================== */

/* Font Import: Outfit (headings) and Inter (body text) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  /* HSL Color Palette (Earth & Forest Tones) */
  --primary-h: 145;
  --primary-s: 30%;
  --primary-l: 25%;
  --primary: hsl(var(--primary-h), var(--primary-s), var(--primary-l)); /* Forest Green */
  --primary-light: hsl(var(--primary-h), var(--primary-s), 95%);
  --primary-dark: hsl(var(--primary-h), var(--primary-s), 15%);
  
  --accent-h: 38;
  --accent-s: 45%;
  --accent-l: 50%;
  --accent: hsl(var(--accent-h), var(--accent-s), var(--accent-l)); /* Ochre / Warm Gold */

  --text-main: #2b302c;
  --text-muted: #5e6660;
  --bg-main: #f9fbf9;
  --bg-card: #ffffff;
  --border-color: #e2e8e3;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.03);

  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 70px;
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --text-main: #e2e9e4;
  --text-muted: #9bb0a1;
  --bg-main: #0e120f;
  --bg-card: #161c18;
  --border-color: #27302a;
  --primary-light: hsl(var(--primary-h), var(--primary-s), 12%);
  --primary-dark: hsl(var(--primary-h), var(--primary-s), 85%);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 20px rgba(0,0,0,0.4);
}

/* CSS Resets & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.65;
  font-size: 1.1rem; /* ~17.6px base font size for readability */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--primary-dark);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 0.8rem;
}

h1 { font-size: 2.6rem; font-weight: 700; }
h2 { font-size: 1.8rem; border-bottom: 2px solid var(--border-color); padding-bottom: 0.5rem; margin-top: 2rem; }
h3 { font-size: 1.4rem; margin-top: 1.5rem; }
h4 { font-size: 1.15rem; }

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

/* Accessibility Focus States */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

/* Base Layout Grid */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* Header & Sticky Menu */
.site-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  background-color: hsla(var(--primary-h), var(--primary-s), var(--primary-l), 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--primary-dark);
  color: #ffffff;
}

/* For users with system light/dark settings, base styling handles headers */
.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo a {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-leaf {
  color: #4ade80;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: #e2e9e4;
  font-weight: 500;
  font-size: 1rem;
}

.nav-links a:hover, .nav-links a:focus {
  color: #ffffff;
}

/* Mega Menu Dropdowns */
.has-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 250px;
  display: none;
  list-style: none;
  padding: 0.8rem 0;
  z-index: 1100;
}

.dropdown-menu a {
  color: var(--text-main) !important;
  padding: 0.5rem 1.5rem;
  display: block;
}

.dropdown-menu a:hover {
  background-color: var(--primary-light);
  color: var(--primary) !important;
}

.has-dropdown:hover .dropdown-menu,
.has-dropdown:focus-within .dropdown-menu {
  display: block;
}

/* Header Utilities */
.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Button UI */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-family: var(--font-heading);
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
  font-size: 0.95rem;
}

.btn-primary {
  background-color: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: hsl(var(--accent-h), var(--accent-s), 42%);
  color: #ffffff;
}

.btn-outline {
  background-color: transparent;
  border: 1.5px solid var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  background-color: var(--border-color);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  color: inherit;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.4rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  transition: var(--transition-smooth);
}

.theme-toggle:hover {
  background-color: rgba(255,255,255,0.1);
}

/* Search Bar in Header */
.search-form {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  padding: 0.4rem 0.8rem 0.4rem 2rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-main);
  font-size: 0.9rem;
  width: 180px;
  transition: var(--transition-smooth);
}

.search-input:focus {
  width: 250px;
  border-color: var(--accent);
}

.search-icon-btn {
  position: absolute;
  left: 0.6rem;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
  margin: 1.2rem 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.breadcrumb-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  padding-right: 0.5rem;
  color: var(--border-color);
}

.breadcrumb-item a {
  color: var(--text-muted);
}

.breadcrumb-item.active {
  color: var(--text-main);
  font-weight: 500;
}

/* Homepage Styles */
.hero {
  padding: 4.5rem 0;
  background: linear-gradient(135deg, var(--primary-light), var(--bg-main));
  text-align: center;
  border-radius: var(--radius-lg);
  margin: 1.5rem 0 3rem 0;
  border: 1px solid var(--border-color);
}

.hero-h1 {
  font-size: 3.2rem;
  color: var(--primary);
  max-width: 800px;
  margin: 0 auto 1.2rem auto;
}

.hero-subtitle {
  font-size: 1.3rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2rem auto;
}

/* Home Section Layouts */
.section-title {
  font-size: 2.1rem;
  text-align: center;
  margin-bottom: 2rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 4px;
  background-color: var(--accent);
  margin: 0.6rem auto 0 auto;
  border-radius: 2px;
}

.home-section {
  padding: 3rem 0;
}

.home-intro {
  max-width: 850px;
  margin: 0 auto;
  text-align: center;
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* Category Grid & Cards */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.category-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

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

.category-card h3 {
  margin-bottom: 0.6rem;
  color: var(--primary);
}

.category-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.2rem;
  flex-grow: 1;
}

/* Article Lists and Grids */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

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

.article-card-image {
  background-color: var(--primary-light);
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border-color);
  font-weight: 500;
  text-align: center;
  padding: 1rem;
}

.article-card-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-card-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  display: flex;
  gap: 0.8rem;
}

.article-card-title {
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
  line-height: 1.35;
}

.article-card-title a {
  color: var(--text-main);
}

.article-card-title a:hover {
  color: var(--primary);
}

.article-card-description {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.2rem;
  flex-grow: 1;
}

/* FAQ Accordion UI */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.2rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  padding: 0 1.5rem 1.2rem 1.5rem;
  color: var(--text-muted);
  display: none;
  font-size: 1rem;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-icon::after {
  content: '+';
  font-size: 1.4rem;
  transition: var(--transition-smooth);
}

.faq-item.active .faq-icon::after {
  content: '−';
}

/* Newsletter & Footer */
.newsletter-section {
  background-color: var(--primary-light);
  border-radius: var(--radius-lg);
  padding: 3rem;
  text-align: center;
  border: 1px solid var(--border-color);
  max-width: 800px;
  margin: 2rem auto;
}

.newsletter-form {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  max-width: 500px;
  margin: 1.5rem auto 0 auto;
}

.newsletter-input {
  flex-grow: 1;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-main);
}

/* Trust / Why Us Badges */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.trust-badge {
  text-align: center;
  padding: 1.5rem;
}

.trust-badge-icon {
  font-size: 2.2rem;
  color: var(--accent);
  margin-bottom: 0.8rem;
}

.trust-badge h3 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}

.trust-badge p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Article Template Structure */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 2.5rem;
  margin-top: 2rem;
}

.article-content {
  min-width: 0; /* Prevent flex/grid overflow */
}

/* Post Metadata Header */
.post-header {
  margin-bottom: 2rem;
}

.post-header h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.post-meta-details {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.post-meta-details a {
  color: var(--primary);
  font-weight: 500;
}

/* Sticky Sidebar Table of Contents */
.sidebar-toc {
  position: sticky;
  top: calc(var(--header-height) + 20px);
  height: fit-content;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.toc-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--primary-dark);
  margin-bottom: 0.8rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4rem;
}

.toc-list {
  list-style: none;
  font-size: 0.95rem;
}

.toc-item {
  margin-bottom: 0.5rem;
}

.toc-item a {
  color: var(--text-muted);
  display: block;
}

.toc-item a:hover,
.toc-item.active a {
  color: var(--primary);
  font-weight: 500;
  padding-left: 4px;
  border-left: 2px solid var(--accent);
}

/* Inline Elements inside Articles */
.article-body {
  line-height: 1.8;
  font-size: 1.15rem;
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body ul, .article-body ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

.article-body li {
  margin-bottom: 0.4rem;
}

.article-body blockquote {
  border-left: 4px solid var(--primary);
  background-color: var(--primary-light);
  padding: 1.2rem 1.8rem;
  margin: 2rem 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
}

/* Callout Boxes (Tips, Warnings, Examples) */
.callout {
  padding: 1.2rem 1.5rem;
  border-radius: var(--radius-md);
  margin: 1.8rem 0;
  border-left: 4px solid;
  font-size: 1.05rem;
}

.callout-title {
  font-family: var(--font-heading);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.callout-tip {
  background-color: #f0fdf4;
  border-color: #22c55e;
  color: #14532d;
}
.callout-tip .callout-title { color: #15803d; }

.callout-warning {
  background-color: #fef2f2;
  border-color: #ef4444;
  color: #7f1d1d;
}
.callout-warning .callout-title { color: #b91c1c; }

.callout-example {
  background-color: #eff6ff;
  border-color: #3b82f6;
  color: #1e3a8a;
}
.callout-example .callout-title { color: #1d4ed8; }

/* Image Placeholders with Captions */
.media-container {
  margin: 2rem 0;
}

.image-placeholder {
  background-color: var(--primary-light);
  border: 1px dashed var(--primary);
  border-radius: var(--radius-md);
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 500;
  flex-direction: column;
  gap: 0.5rem;
  padding: 2rem;
  text-align: center;
}

.media-caption {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.6rem;
}

/* Key Takeaways UI Box */
.key-takeaways {
  background-color: var(--bg-card);
  border: 2px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 2rem 0;
}

.key-takeaways h3 {
  color: var(--primary);
  margin-top: 0;
  border: none;
  padding: 0;
}

.key-takeaways ul {
  padding-left: 1.5rem;
  margin: 0;
}

.key-takeaways li {
  margin-bottom: 0.5rem;
}

/* Sources & Citations list */
.post-sources {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.post-sources h3 {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.post-sources ol {
  padding-left: 1.5rem;
}

/* Author Bio Cards */
.author-bio-card {
  display: flex;
  gap: 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  margin: 3rem 0;
  align-items: center;
}

.author-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background-color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 2rem;
  font-weight: bold;
  flex-shrink: 0;
}

.author-bio-details h3 {
  margin: 0 0 0.4rem 0;
}

.author-bio-details p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Navigation Links (Next/Prev Article) */
.prev-next-links {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
  margin: 2rem 0;
}

.prev-next-card {
  width: 50%;
  display: flex;
  flex-direction: column;
}

.prev-next-card.next {
  text-align: right;
}

.prev-next-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.prev-next-title {
  font-weight: 600;
  font-size: 1.05rem;
}

/* Comment Box UI */
.comments-section {
  margin: 3rem 0;
}

.comments-section h3 {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4rem;
  margin-bottom: 1.5rem;
}

.comment-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 600px;
  margin-bottom: 2rem;
}

.comment-textarea {
  min-height: 100px;
  padding: 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-main);
  font-family: var(--font-body);
}

.comment-inputs-row {
  display: flex;
  gap: 1rem;
}

.comment-inputs-row input {
  width: 50%;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-main);
}

/* Post Action / Utility buttons */
.post-utilities {
  display: flex;
  gap: 0.8rem;
  margin-bottom: 2rem;
  align-items: center;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.share-btn:hover {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

/* Site Footer */
.site-footer {
  background-color: var(--primary-dark);
  color: #cbd5e1;
  padding: 4rem 0 2rem 0;
  margin-top: 4rem;
  border-top: 4px solid var(--accent);
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-heading {
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.2rem;
  font-family: var(--font-heading);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  color: #94a3b8;
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: #64748b;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom-links {
  display: flex;
  gap: 1rem;
}

.footer-bottom-links a {
  color: #64748b;
}

.footer-bottom-links a:hover {
  color: #ffffff;
}

/* Search Page Layout */
.search-results-page {
  padding: 2rem 0;
}

.search-results-header {
  margin-bottom: 2rem;
}

.search-results-count {
  font-size: 1rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

/* Search bar styling inside a page */
.search-hero-bar {
  max-width: 600px;
  margin: 2rem 0;
  position: relative;
}

.search-hero-input {
  width: 100%;
  padding: 1rem 1rem 1rem 2.8rem;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-main);
  font-size: 1.1rem;
  transition: var(--transition-smooth);
}

.search-hero-input:focus {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.search-hero-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

/* Cookie Notice Bar */
.cookie-banner {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 1.2rem 1.8rem;
  width: 90%;
  max-width: 550px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  z-index: 10000;
  font-size: 0.9rem;
}

.cookie-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.8rem;
}

/* Responsive Breakpoints */
@media (max-width: 968px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .sidebar-toc {
    display: none; /* Hide TOC on mobile/tablet or render inline */
  }
}

@media (max-width: 768px) {
  body {
    font-size: 1rem;
  }
  h1 { font-size: 2.1rem; }
  h2 { font-size: 1.55rem; }
  
  .site-header {
    height: auto;
    padding: 0.5rem 0;
  }
  .header-container {
    flex-wrap: wrap;
    gap: 0.8rem;
  }
  .main-nav {
    display: none; /* Hidden by default, toggled via JS */
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 0;
  }
  .main-nav.active {
    display: flex;
  }
  .nav-links {
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1rem;
  }
  .mobile-nav-toggle {
    display: block;
  }
  .search-form {
    width: 100%;
  }
  .search-input {
    width: 100%;
  }
  .search-input:focus {
    width: 100%;
  }
  
  .hero-h1 {
    font-size: 2.2rem;
  }
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  .prev-next-links {
    flex-direction: column;
  }
  .prev-next-card {
    width: 100%;
  }
  .prev-next-card.next {
    text-align: left;
    margin-top: 1rem;
  }
  .author-bio-card {
    flex-direction: column;
    text-align: center;
  }
  .comment-inputs-row {
    flex-direction: column;
  }
  .comment-inputs-row input {
    width: 100%;
  }
}