/* ========================================
   DUAL TERMINAL — Precision Interface
   SQL Server → PostgreSQL Migration Guide
   ======================================== */

/* ========================================
   CSS VARIABLES
   ======================================== */

:root {
  /* Dark Theme (Default) */
  --bg-body:      #080d16;
  --bg-primary:   #0e1520;
  --bg-secondary: #111a28;
  --bg-tertiary:  #182233;
  --bg-divider:   #1e2d42;

  --text-primary:   #bfcfde;
  --text-secondary: #7a9ab8;
  --text-muted:     #2c3f52;
  --text-accent:    #6aa8d0;

  --code-bg:   #060b12;
  --code-text: #9bbfd8;

  /* SQL Server — warm amber/orange */
  --sql-badge-bg:      #c97a38;
  --sql-badge-text:    #ffffff;
  --sql-accent-bg:     rgba(201, 122, 56, 0.07);
  --sql-accent-border: rgba(201, 122, 56, 0.28);
  --sql-accent-text:   #d4924e;
  --sql-color:         #c97a38;
  --sql-glow:          rgba(201, 122, 56, 0.12);

  /* PostgreSQL — cool blue */
  --pg-badge-bg:      #2e7ab5;
  --pg-badge-text:    #ffffff;
  --pg-accent-bg:     rgba(46, 122, 181, 0.07);
  --pg-accent-border: rgba(46, 122, 181, 0.28);
  --pg-accent-text:   #4a9cd4;
  --pg-color:         #2e7ab5;
  --pg-glow:          rgba(46, 122, 181, 0.12);

  /* Category accent colors */
  --category-fundamentals: #4a8fd4;
  --category-database:     #8060c8;
  --category-backup:       #28a870;
  --category-security:     #c89040;
  --category-performance:  #c84848;

  /* Alerts */
  --note-bg:     rgba(74, 143, 212, 0.07);
  --note-border: rgba(74, 143, 212, 0.28);
  --note-text:   #5aa0cc;

  --warn-bg:     rgba(201, 144, 64, 0.08);
  --warn-border: rgba(201, 144, 64, 0.35);
  --warn-text:   #c99040;

  /* UI surfaces */
  --card-shadow:  0 1px 3px rgba(0, 0, 0, 0.5);
  --hover-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

/* Light Theme */
[data-theme="light"] {
  --bg-body:      #ede8e0;
  --bg-primary:   #f8f4ee;
  --bg-secondary: #f2ece3;
  --bg-tertiary:  #e8e0d4;
  --bg-divider:   #d0c8ba;

  --text-primary:   #1a2432;
  --text-secondary: #3a4e62;
  --text-muted:     #8a9aaa;
  --text-accent:    #2a6898;

  --code-bg:   #18222e;
  --code-text: #9bbfd8;

  --sql-badge-bg:      #c97a38;
  --sql-badge-text:    #ffffff;
  --sql-accent-bg:     rgba(201, 122, 56, 0.06);
  --sql-accent-border: rgba(201, 122, 56, 0.22);
  --sql-accent-text:   #a05820;
  --sql-color:         #c97a38;
  --sql-glow:          rgba(201, 122, 56, 0.08);

  --pg-badge-bg:      #2e7ab5;
  --pg-badge-text:    #ffffff;
  --pg-accent-bg:     rgba(46, 122, 181, 0.06);
  --pg-accent-border: rgba(46, 122, 181, 0.22);
  --pg-accent-text:   #1a5e96;
  --pg-color:         #2e7ab5;
  --pg-glow:          rgba(46, 122, 181, 0.08);

  --note-bg:     rgba(46, 122, 181, 0.06);
  --note-border: rgba(46, 122, 181, 0.22);
  --note-text:   #1a5e96;

  --warn-bg:     rgba(201, 144, 64, 0.06);
  --warn-border: rgba(201, 144, 64, 0.28);
  --warn-text:   #8a5818;

  --card-shadow:  0 1px 2px rgba(0, 0, 0, 0.08);
  --hover-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

/* ========================================
   BASE STYLES
   ======================================== */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-body);
  background-image:
    radial-gradient(circle, var(--bg-divider) 1px, transparent 1px);
  background-size: 32px 32px;
  min-height: 100vh;
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 15px;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

[data-theme="light"] body {
  background-image:
    radial-gradient(circle, var(--bg-divider) 1px, transparent 1px);
}

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 16px 32px;
}

/* ========================================
   HEADER
   ======================================== */

.header {
  padding: 28px 0 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--bg-divider);
  position: relative;
  background: transparent;
  box-shadow: none;
  border-radius: 0;
  transition: border-color 0.3s ease;
}

/* Gradient accent line at very bottom of header */
.header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--sql-color) 0%,
    transparent 35%,
    transparent 65%,
    var(--pg-color) 100%
  );
  opacity: 0.6;
}

.header-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 10px;
}

.header-title-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-icon {
  width: 28px;
  height: 28px;
  color: var(--text-accent);
  flex-shrink: 0;
  opacity: 0.85;
}

.header-title {
  font-family: 'Syne', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  margin: 0;
}

.header-subtitle {
  color: var(--text-secondary);
  font-size: 15px;
  letter-spacing: 0.01em;
  margin: 0;
  padding-left: 0;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-divider);
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-secondary);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.theme-icon {
  width: 14px;
  height: 14px;
}

/* ========================================
   BREADCRUMBS
   ======================================== */

.breadcrumbs {
  padding: 0;
  margin-bottom: 16px;
  background: transparent;
  box-shadow: none;
  border-radius: 0;
  border: none;
  transition: none;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  flex-wrap: wrap;
  font-family: 'Syne', sans-serif;
  letter-spacing: 0.03em;
}

.breadcrumb-icon {
  font-size: 13px;
  opacity: 0.5;
  margin-right: 2px;
}

.breadcrumb-item {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  padding: 4px 6px;
  border-radius: 4px;
  transition: all 0.15s ease;
}

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

.breadcrumb-separator {
  color: var(--text-muted);
  font-size: 13px;
}

.breadcrumb-category {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 4px;
  color: white;
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  opacity: 0.85;
}

.breadcrumb-category:hover {
  opacity: 1;
  transform: none;
  box-shadow: none;
}

.breadcrumb-current {
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
}

.breadcrumb-count {
  margin-left: auto;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: 'Syne', sans-serif;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-divider);
  border-radius: 4px;
}

/* ========================================
   DROPDOWN NAVIGATION
   ======================================== */

.dropdown-nav {
  padding: 12px 0;
  background: transparent;
  border-bottom: 1px solid var(--bg-divider);
  border-radius: 0;
  box-shadow: none;
  margin-bottom: 24px;
  transition: border-color 0.3s ease;
  position: relative;
}

/* Hamburger trigger button */
.hamburger-button {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 18px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--bg-divider);
  border-radius: 5px;
  cursor: pointer;
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all 0.15s ease;
  user-select: none;
}

.hamburger-button:hover,
.hamburger-button.active {
  background: var(--bg-tertiary);
  border-color: var(--text-muted);
}

.hamburger-lines {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
  flex-shrink: 0;
}

.hamburger-lines span {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: all 0.2s ease;
}

.hamburger-arrow {
  font-size: 10px;
  opacity: 0.6;
  margin-left: 2px;
  transition: transform 0.2s ease;
}

.hamburger-button.active .hamburger-arrow {
  transform: rotate(180deg);
}

/* Floating panel containing the category dropdowns */
.hamburger-panel {
  display: none;
  position: absolute;
  top: calc(100% - 12px);
  left: 0;
  z-index: 200;
  background: var(--bg-primary);
  border: 1px solid var(--bg-divider);
  border-radius: 6px;
  padding: 14px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  max-width: calc(100vw - 48px);
}

[data-theme="light"] .hamburger-panel {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.hamburger-panel.active {
  display: block;
}

.dropdown-container {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.dropdown-wrapper {
  position: relative;
}

.dropdown-button {
  padding: 8px 16px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--bg-divider);
  border-radius: 5px;
  cursor: pointer;
  font-family: 'Syne', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: all 0.15s ease;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

/* Colored left accent using --cat-color CSS custom property set inline */
.dropdown-button::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cat-color, var(--text-muted));
  border-radius: 2px 0 0 2px;
}

.dropdown-button:hover {
  background: var(--bg-tertiary);
  border-color: var(--text-muted);
  transform: none;
}

.dropdown-button.active {
  background: var(--cat-color, var(--bg-tertiary));
  color: white;
  border-color: transparent;
}

.dropdown-icon {
  font-size: 11px;
  opacity: 0.6;
  margin-left: 2px;
  transition: transform 0.2s ease;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  background: var(--bg-primary);
  border: 1px solid var(--bg-divider);
  border-radius: 6px;
  padding: 6px;
  min-width: 260px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  z-index: 100;
  display: none;
}

[data-theme="light"] .dropdown-menu {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.dropdown-menu.active {
  display: block;
}

.dropdown-topic {
  width: 100%;
  padding: 9px 12px;
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-align: left;
  margin-bottom: 2px;
  color: var(--text-secondary);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  transition: all 0.15s ease;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dropdown-topic:last-child {
  margin-bottom: 0;
}

.dropdown-topic:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.dropdown-topic.selected,
.dropdown-topic.active {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-weight: 500;
}

.dropdown-topic.active::before {
  content: none; /* remove old checkmark */
}

.topic-badge {
  font-family: 'Syne', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--bg-divider);
  padding: 2px 7px;
  border-radius: 3px;
  flex-shrink: 0;
}

.new-badge {
  display: inline-block;
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #fff;
  background: #2a9d5c;
  border-radius: 3px;
  padding: 1px 5px;
  margin-left: 6px;
  vertical-align: middle;
  flex-shrink: 0;
}

.content-header .new-badge {
  font-size: 13px;
  padding: 2px 8px;
  margin-left: 0;
  vertical-align: middle;
}

/* ========================================
   HOMEPAGE
   ======================================== */

.homepage {
  background: transparent;
  padding: 0;
  border-radius: 0;
  box-shadow: none;
  transition: none;
}

.homepage-hero {
  text-align: center;
  margin-bottom: 40px;
  padding: 32px 0 0;
  position: relative;
}

/* Ambient glow behind title */
.homepage-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse at center top,
    rgba(74, 143, 212, 0.06) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.homepage-title {
  font-family: 'Syne', sans-serif;
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 20px;
  position: relative;
}

[data-theme="light"] .homepage-title {
  color: #0e1c2c;
}

.homepage-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.75;
  font-weight: 400;
}

/* Categories grid */
.homepage-categories {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

/* ========================================
   CATEGORY CARDS
   ======================================== */

.categories-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 0;
}

.category-card {
  background: var(--bg-primary);
  padding: 28px;
  border-radius: 6px;
  border: 1px solid var(--bg-divider);
  border-top: 3px solid transparent; /* will be overridden by inline style */
  transition: all 0.2s ease;
  cursor: pointer;
  position: relative;
}

/* Override the default border-top with the category color from inline style */
.category-card[style*="border-color"] {
  border-top-color: inherit;
}

.category-card::after {
  content: 'Explore →';
  position: absolute;
  bottom: 18px;
  right: 20px;
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.category-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--hover-shadow);
  border-color: var(--bg-divider);
  background: var(--bg-secondary);
}

.category-card:hover::after {
  opacity: 1;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.category-icon {
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
}

.category-title {
  font-family: 'Syne', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.2px;
  margin: 0;
}

.category-description {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.65;
  margin-bottom: 18px;
}

.category-topics {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.category-topic-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-divider);
  border-radius: 4px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.category-card:hover .category-topic-item {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.topic-count {
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--bg-divider);
  padding: 1px 6px;
  border-radius: 3px;
}

/* ========================================
   CONTRIBUTION SECTION
   ======================================== */

.contribution-section {
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--bg-divider);
}

.contribution-grid {
  display: grid;
  grid-template-columns: 1fr;
  max-width: 100%;
  margin: 0 auto;
}

.contribution-header {
  text-align: center;
  margin-bottom: 28px;
  padding: 0 20px;
}

.contribution-title {
  font-family: 'Syne', sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.contribution-subtitle {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

.contribution-callout {
  margin-top: 28px;
  padding: 18px 24px;
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  border-left: 3px solid var(--pg-color);
  border-radius: 6px;
  text-align: center;
}

.contribution-callout p {
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.65;
}

/* JSON Builder Card overrides */
.json-builder-card {
  border-top: 3px solid #28a870 !important;
}

/* GitHub Repo Card */
.github-repo-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border-top: 3px solid #6e7681 !important;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

[data-theme="light"] .github-repo-card {
  border-top-color: #24292f !important;
}

.github-repo-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
  text-decoration: none;
  color: inherit;
}

.github-repo-card .category-icon svg {
  display: block;
}

/* GitHub footer link */
.github-footer-link {
  display: inline-flex;
  align-items: center;
}

/* ========================================
   CONTENT AREA
   ======================================== */

.content-wrapper {
  background: transparent;
  padding: 0;
  border-radius: 0;
  box-shadow: none;
  transition: none;
}

.content-header {
  text-align: left;
  margin-bottom: 40px;
  padding: 32px 0 28px;
  border-bottom: 1px solid var(--bg-divider);
  position: relative;
}

.content-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 80px;
  height: 2px;
  background: var(--pg-color);
  opacity: 0.7;
}

.content-title {
  font-family: 'Syne', sans-serif;
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  margin: 0 0 8px 0;
}

.content-description {
  color: var(--text-secondary);
  font-size: 16px;
  margin: 0;
  line-height: 1.65;
}

/* ========================================
   CONCEPT HEADERS
   ======================================== */

.concept-header {
  margin: 64px 0 20px 0;
  padding-top: 0;
  padding-bottom: 12px;
  border-top: none;
  border-bottom: 1px solid var(--bg-divider);
  position: relative;
  display: flex;
  align-items: center;
}

.concept-header:first-child {
  margin-top: 0;
}

.concept-placeholder + .concept-placeholder {
  border-top: 2px solid var(--bg-divider);
  padding-top: 48px;
  margin-top: 48px;
}

.concept-title {
  font-family: 'Syne', sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  margin: 0;
}

/* ========================================
   COMPARISON GRID — THE HEART OF THE APP
   ======================================== */

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-bottom: 0;
  border: 1px solid var(--bg-divider);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-divider); /* acts as the 1px divider between sides */
}

.comparison-side {
  background: var(--bg-primary);
  padding: 22px;
  min-width: 0;
  overflow: hidden;
  position: relative;
  display: none;
  border-left: none;
}

.comparison-side.active {
  display: block;
}

/* SQL Server side — warm top accent */
.comparison-side.sql-server {
  background: var(--bg-primary);
  border-top: 2px solid var(--sql-color);
}

/* PostgreSQL side — cool top accent */
.comparison-side.postgresql {
  background: var(--bg-primary);
  border-top: 2px solid var(--pg-color);
  border-left: none;
}

/* Mobile tabs — visible by default, hidden on desktop */
.platform-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 0;
  border-radius: 5px 5px 0 0;
  overflow: hidden;
  border: 1px solid var(--bg-divider);
  border-bottom: none;
}

.platform-tab {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: none;
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--text-secondary);
  text-align: center;
}

.platform-tab.active {
  background: var(--bg-primary);
  color: var(--text-primary);
}

.platform-tab.sql-server.active {
  background: var(--sql-color);
  color: white;
}

.platform-tab.postgresql.active {
  background: var(--pg-color);
  color: white;
}

/* ========================================
   PLATFORM BADGES
   ======================================== */

.platform-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 3px;
  font-family: 'Syne', sans-serif;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: white;
  margin-bottom: 18px;
}

.platform-badge.sql-server {
  background: var(--sql-badge-bg);
}

.platform-badge.postgresql {
  background: var(--pg-badge-bg);
}

/* ========================================
   CODE BLOCKS
   ======================================== */

.code-container {
  position: relative;
  background: var(--code-bg);
  border-radius: 5px;
  padding: 20px;
  margin-bottom: 18px;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.code-block {
  color: var(--code-text);
  font-size: 14.5px;
  line-height: 1.75;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;
  white-space: pre;
  overflow-x: auto;
  margin: 0;
  min-width: 0;
  word-wrap: normal;
}

.code-block::-webkit-scrollbar {
  height: 6px;
}

.code-block::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 3px;
}

.code-block::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

.code-block::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

.platform-description {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.7;
  margin-top: 14px;
  padding: 14px 18px;
  border-radius: 5px;
  border: 1px solid var(--bg-divider);
  background: var(--bg-secondary);
}

.comparison-side.sql-server .platform-description {
  border-left: 3px solid var(--sql-color);
  background: var(--sql-accent-bg);
  border-color: var(--sql-accent-border);
}

.comparison-side.postgresql .platform-description {
  border-left: 3px solid var(--pg-color);
  background: var(--pg-accent-bg);
  border-color: var(--pg-accent-border);
}

.copy-button {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  color: rgba(255, 255, 255, 0.4);
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  letter-spacing: 0.03em;
}

.copy-button:hover {
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.75);
  border-color: rgba(255, 255, 255, 0.2);
}

.copy-button.copied {
  background: rgba(40, 168, 112, 0.2);
  border-color: rgba(40, 168, 112, 0.4);
  color: #28a870;
}

/* ========================================
   KEY DIFFERENCE CALLOUT
   ======================================== */

.key-difference {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-left: 3px solid var(--warn-text);
  border-radius: 5px;
  padding: 18px 22px;
  margin-top: 0;
  margin-bottom: 20px;
}

.key-difference-title {
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--warn-text);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 7px;
}

.key-difference-text {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.7;
  margin: 0;
}

/* Alternative key-differences style */
.key-differences {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-left: 3px solid var(--warn-text);
  border-radius: 5px;
  padding: 16px 20px;
  margin-top: 20px;
}

.key-differences strong {
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--warn-text);
}

.key-differences ul {
  margin-top: 10px;
  padding-left: 20px;
}

.key-differences li {
  margin-bottom: 5px;
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.65;
}

/* ========================================
   RESPONSIVE DESIGN — MOBILE FIRST
   Base styles above are mobile defaults.
   These queries scale up for larger viewports.
   ======================================== */

/* 480px — categories grid gets multi-column */
@media (min-width: 480px) {
  .categories-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

/* 640px — homepage categories get multi-column */
@media (min-width: 640px) {
  .homepage-categories {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

/* 768px — main desktop breakpoint */
@media (min-width: 768px) {
  .container {
    padding: 0 24px 40px;
  }

  .header-content {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 0;
  }

  .header-subtitle {
    padding-left: 42px; /* aligns with title, after icon */
  }

  .homepage-title {
    font-size: 48px;
  }

  .homepage-hero {
    padding: 56px 32px 0;
    margin-bottom: 56px;
  }

  .comparison-grid {
    grid-template-columns: 1fr 1fr;
  }

  .comparison-side {
    display: block;
    padding: 28px 32px;
    border-left: none;
  }

  .comparison-side.postgresql {
    border-left: 1px solid var(--bg-divider);
  }

  /* Hide tabs on desktop — both sides are always visible */
  .platform-tabs {
    display: none;
  }

  .content-title {
    font-size: 30px;
  }

  .contribution-section {
    margin-top: 56px;
    padding-top: 40px;
  }

  .contribution-grid {
    grid-template-columns: 1fr 1fr;
    max-width: 840px;
  }

  .contribution-title {
    font-size: 28px;
  }

  .json-builder-comparison {
    grid-template-columns: 1fr 1fr;
  }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.hidden {
  display: none !important;
}

.loading {
  opacity: 0.5;
  pointer-events: none;
}

.content-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* ========================================
   JSON BUILDER TOOL STYLES
   ======================================== */

.json-builder-container {
  width: 100%;
}

.json-builder-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: start;
}

.json-builder-editor {
  background: var(--bg-primary);
  border-radius: 6px;
  border: 1px solid var(--bg-divider);
  padding: 24px;
}

.json-builder-preview {
  background: var(--bg-secondary);
  border-radius: 6px;
  border: 1px solid var(--bg-divider);
  padding: 24px;
}

.json-builder-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--bg-divider);
  padding-bottom: 12px;
}

.json-builder-tab {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  font-family: 'Syne', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.json-builder-tab:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.json-builder-tab.active {
  background: var(--pg-color);
  border-color: var(--pg-color);
  color: white;
}

.json-builder-tab-content {
  display: none;
}

.json-builder-tab-content.active {
  display: block;
}

.json-builder-section {
  background: var(--bg-secondary);
  padding: 20px;
  border-radius: 6px;
  border: 1px solid var(--bg-divider);
  margin-bottom: 16px;
}

.json-builder-section-title {
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-accent);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.json-builder-form-group {
  margin-bottom: 18px;
}

.json-builder-form-group label {
  display: block;
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 7px;
  color: var(--text-secondary);
}

.json-builder-label-help {
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
  color: var(--text-muted);
  font-size: 10px;
  letter-spacing: 0;
  text-transform: none;
}

.json-builder-form-group input[type="text"],
.json-builder-form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--bg-divider);
  border-radius: 5px;
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  transition: border-color 0.2s;
  background: var(--bg-primary);
  color: var(--text-primary);
  outline: none;
}

.json-builder-form-group input[type="text"]:focus,
.json-builder-form-group textarea:focus {
  border-color: var(--pg-color);
}

.json-builder-form-group input[type="text"][readonly] {
  background: var(--bg-tertiary);
  cursor: not-allowed;
  color: var(--text-secondary);
}

.json-builder-form-group textarea {
  resize: vertical;
  min-height: 90px;
}

.json-builder-description {
  min-height: 110px;
  font-family: 'DM Sans', sans-serif;
}

.json-builder-code-editor {
  min-height: 200px;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', 'Monaco', monospace;
  font-size: 12.5px;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 14px;
  border-radius: 5px;
  border: 1px solid var(--bg-divider);
}

.json-builder-concept-card {
  background: var(--bg-primary);
  padding: 20px;
  border-radius: 6px;
  margin-bottom: 16px;
  border: 1px solid var(--bg-divider);
  border-left: 3px solid var(--pg-color);
}

.json-builder-concept-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.json-builder-concept-title {
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--text-primary);
}

.json-builder-btn {
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: 5px;
  font-family: 'Syne', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all 0.15s;
}

.json-builder-btn-primary {
  background: var(--pg-color);
  color: white;
  border-color: var(--pg-color);
}

.json-builder-btn-primary:hover {
  background: #2568a0;
  transform: none;
  box-shadow: none;
}

.json-builder-btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--bg-divider);
}

.json-builder-btn-secondary:hover {
  background: var(--bg-divider);
}

.json-builder-btn-danger {
  background: transparent;
  color: #c84848;
  border-color: rgba(200, 72, 72, 0.3);
  padding: 7px 12px;
  font-size: 11px;
}

.json-builder-btn-danger:hover {
  background: rgba(200, 72, 72, 0.08);
  border-color: rgba(200, 72, 72, 0.5);
}

.json-builder-btn-success {
  background: #28a870;
  color: white;
  border-color: #28a870;
}

.json-builder-btn-success:hover {
  background: #209060;
}

.json-builder-btn-add {
  background: transparent;
  color: var(--text-accent);
  border-color: var(--bg-divider);
  margin-top: 8px;
}

.json-builder-btn-add:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.json-builder-actions {
  display: flex;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--bg-divider);
  flex-wrap: wrap;
}

.json-builder-preview-content {
  background: var(--bg-primary);
  padding: 20px;
  border-radius: 6px;
  border: 1px solid var(--bg-divider);
  margin-bottom: 16px;
  display: none;
}

.json-builder-preview-content.active {
  display: block;
}

.json-builder-preview-title {
  font-family: 'Syne', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

.json-builder-preview-description {
  color: var(--text-secondary);
  font-size: 13px;
  margin-bottom: 20px;
  line-height: 1.65;
}

.json-builder-comparison {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.json-builder-sql-server {
  border-left: 3px solid var(--sql-color);
  padding-left: 14px;
}

.json-builder-postgres {
  border-left: 3px solid var(--pg-color);
  padding-left: 14px;
}

.json-builder-code-block {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 14px;
  border-radius: 5px;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', 'Monaco', monospace;
  font-size: 12px;
  white-space: pre-wrap;
  margin: 8px 0;
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.json-builder-list {
  margin: 8px 0;
  padding-left: 18px;
}

.json-builder-list li {
  margin-bottom: 5px;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
}

.json-builder-json-output {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 20px;
  border-radius: 5px;
  border: 1px solid rgba(255, 255, 255, 0.04);
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', 'Monaco', monospace;
  font-size: 12px;
  overflow-x: auto;
  max-height: 600px;
  overflow-y: auto;
}

.json-builder-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: #28a870;
  color: white;
  padding: 14px 22px;
  border-radius: 6px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  display: none;
  z-index: 1000;
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  animation: slideInFromRight 0.25s ease-out;
}

.json-builder-notification.visible {
  display: block;
}

.json-builder-notification.error {
  background: #dc3545;
}

@keyframes slideInFromRight {
  from {
    transform: translateX(100px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ========================================
   AI TRANSPARENCY NOTICE
   ======================================== */

.ai-transparency-notice {
  margin-bottom: 24px;
  padding: 18px 24px;
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-left: 3px solid var(--sql-color);
  border-radius: 6px;
}

.ai-transparency-notice p {
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.65;
  margin: 0;
}

.ai-transparency-notice a {
  color: var(--text-accent);
  text-decoration: underline;
}

/* ========================================
   SITE FOOTER
   ======================================== */

.site-footer {
  margin-top: 48px;
  padding: 20px 24px;
  border-top: 1px solid var(--bg-divider);
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
}

.site-footer a {
  color: var(--text-accent);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.site-footer-disclaimer {
  font-size: 12px;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 8px;
  opacity: 0.85;
}

.site-footer-legal {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 10px;
  opacity: 0.75;
}

.site-footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 6px;
}

/* ========================================
   ABOUT LINK IN HEADER
   ======================================== */

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.about-link {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}

.about-link:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

/* 1024px — JSON Builder gets two-column layout */
@media (min-width: 1024px) {
  .json-builder-layout {
    grid-template-columns: 1fr 1fr;
  }
}

/* ========================================
   SEARCH
   ======================================== */

.search-bar-wrapper {
  margin: 0 auto 32px;
  max-width: 680px;
}

.search-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-primary);
  border: 1px solid var(--bg-divider);
  border-radius: 6px;
  padding: 0 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.search-bar:focus-within {
  border-color: var(--text-accent);
  box-shadow: 0 0 0 3px rgba(106, 168, 208, 0.12);
}

.search-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  color: var(--text-primary);
  padding: 13px 0;
  min-width: 0;
}

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

.search-input::-webkit-search-cancel-button {
  display: none;
}

.search-clear {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 14px;
  padding: 4px;
  line-height: 1;
  border-radius: 3px;
  transition: color 0.15s;
}

.search-clear:hover {
  color: var(--text-primary);
}

.search-filter-status {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 8px;
  text-align: center;
}

/* Results view */

.search-results-view {
  margin-bottom: 32px;
}

.search-results-meta {
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.search-results-loading {
  padding: 40px;
  text-align: center;
  color: var(--text-secondary);
}

.search-results-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.search-result-card {
  background: var(--bg-primary);
  border: 1px solid var(--bg-divider);
  border-radius: 6px;
  padding: 18px 22px;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
}

.search-result-card:hover,
.search-result-card:focus {
  background: var(--bg-secondary);
  transform: translateY(-2px);
  box-shadow: var(--hover-shadow);
  outline: none;
}

.search-result-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.search-result-type {
  font-family: 'Syne', sans-serif;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  border: 1px solid var(--bg-divider);
  border-radius: 3px;
  padding: 1px 5px;
}

.search-result-type--topic {
  color: var(--text-accent);
  border-color: rgba(106, 168, 208, 0.3);
  background: rgba(106, 168, 208, 0.08);
}

.search-result-category {
  font-size: 12px;
  font-weight: 500;
}

.search-result-title {
  font-family: 'Syne', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 4px;
  letter-spacing: -0.2px;
}

.search-result-topic-name {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0 0 6px;
}

.search-result-snippet {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin: 0;
}

.search-highlight {
  background: rgba(201, 144, 64, 0.22);
  color: var(--warn-text);
  border-radius: 2px;
  padding: 0 1px;
}

.search-no-results {
  padding: 48px 24px;
  text-align: center;
  color: var(--text-secondary);
}

.search-no-results strong {
  color: var(--text-primary);
}

.search-no-results-hint {
  font-size: 14px;
  margin-top: 8px;
  color: var(--text-muted);
}