/*
 * PSD3 Shared Styling
 * Common theme and components for all PSD3 projects
 *
 * Design: Clean, minimal "data viz book" aesthetic
 * Inspired by Tufte's principles - content-focused, paper-like
 *
 * Usage: @import or <link> this file, then add project-local overrides
 */

/* ==========================================================================
   CSS Custom Properties (Theme)
   ========================================================================== */

:root {
  /* Brand colors */
  --psd3-gold: #b8860b;           /* Logo/accent color - dark goldenrod */
  --psd3-gold-light: #daa520;     /* Lighter gold for highlights */
  --psd3-gold-dark: #8b6508;      /* Darker gold for hover states */

  /* Background colors */
  --psd3-bg-page: #f8f8f8;        /* Main page background - off-white/cream */
  --psd3-bg-card: #ffffff;        /* Card backgrounds - pure white */
  --psd3-bg-subtle: #f0f0f0;      /* Subtle backgrounds */

  /* Text colors */
  --psd3-text-primary: #1a1a1a;   /* Near-black for headings */
  --psd3-text-body: #333333;      /* Dark gray for body text */
  --psd3-text-muted: #666666;     /* Muted text */
  --psd3-text-light: #888888;     /* Light text for captions */

  /* Border colors */
  --psd3-border: #e0e0e0;         /* Subtle borders */
  --psd3-border-light: #eeeeee;   /* Very subtle borders */

  /* Semantic colors */
  --psd3-link: #2563eb;           /* Link blue */
  --psd3-link-hover: #1d4ed8;     /* Darker link on hover */

  /* Tech badge colors (for Python demos) */
  --psd3-pure: #00a8cc;           /* PureScript/Halogen - teal */
  --psd3-python: #e91e8c;         /* Python - magenta/pink */

  /* Diagram/SVG accent colors (for architecture diagrams) */
  --psd3-accent: var(--psd3-gold);  /* Primary accent - alias to gold */
  --psd3-purple: #7b2ff7;           /* Purple for middleware layers */
  --psd3-pink: var(--psd3-python);  /* Pink - alias to python color */

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Borders */
  --radius-sm: 0.125rem;
  --radius-md: 0.25rem;
  --radius-lg: 0.375rem;
  --radius-xl: 0.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
}

/* ==========================================================================
   Base Reset
   ========================================================================== */

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--psd3-bg-page);
  color: var(--psd3-text-body);
  min-height: 100vh;
}

a {
  color: var(--psd3-link);
  text-decoration: none;
}

a:hover {
  color: var(--psd3-link-hover);
  text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--psd3-text-primary);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

code, pre {
  font-family: var(--font-mono);
}

img, svg {
  display: block;
  max-width: 100%;
}

ul, ol {
  list-style: none;
}

/* ==========================================================================
   App Layout
   ========================================================================== */

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app__main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   Site Navigation
   ========================================================================== */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-6);
  background: var(--psd3-bg-card);
  border-bottom: 1px solid var(--psd3-border-light);
}

/* Spacer for fixed nav */
.home-page,
.app {
  padding-top: 72px; /* Height of nav */
}

.site-nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.site-nav-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav-logo-link {
  display: flex;
  align-items: center;
}

.site-nav-logo {
  height: 40px;
  width: auto;
}

.site-nav-logo--large {
  height: 48px;
}

.site-nav-logo--normal {
  height: 40px;
}

.site-nav-title-container {
  border-left: 1px solid var(--psd3-border);
  padding-left: var(--space-4);
}

.site-nav-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--psd3-text-primary);
}

.site-nav-center {
  display: flex;
  align-items: center;
}

.site-nav-quadrant {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
}

.site-nav-quadrant-box {
  display: block;
  width: 22px;
  height: 22px;
  border: 1px solid var(--psd3-border);
  border-radius: 2px;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.site-nav-quadrant-box--inactive {
  background: var(--psd3-bg-card);
  border-color: #ccc;
}

.site-nav-quadrant-box--inactive:hover {
  background: var(--psd3-gold-light);
  border-color: var(--psd3-gold);
}

.site-nav-quadrant-box--active {
  background: var(--psd3-gold);
  border-color: var(--psd3-gold);
}

.site-nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav-links {
  display: flex;
  gap: var(--space-6);
}

.site-nav-link {
  color: var(--psd3-text-body);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-nav-link:hover {
  color: var(--psd3-text-primary);
  text-decoration: none;
}

.site-nav-prevnext {
  display: flex;
  gap: var(--space-2);
}

.site-nav-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-size: var(--text-lg);
  color: var(--psd3-text-muted);
  background: var(--psd3-bg-subtle);
  border: 1px solid var(--psd3-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.site-nav-button:hover {
  background: var(--psd3-bg-card);
  color: var(--psd3-text-primary);
  border-color: var(--psd3-gold);
  text-decoration: none;
}

.site-nav-button--disabled {
  color: var(--psd3-border);
  cursor: not-allowed;
}

.site-nav-button--disabled:hover {
  background: var(--psd3-bg-subtle);
  border-color: var(--psd3-border);
  color: var(--psd3-border);
}

/* ==========================================================================
   Breadcrumb Navigation
   ========================================================================== */

.breadcrumb {
  background: var(--psd3-bg-page);
  padding: var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--psd3-border-light);
}

.breadcrumb__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  max-width: 1400px;
  margin: 0 auto;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  color: var(--psd3-text-muted);
}

.breadcrumb__item::after {
  content: "/";
  margin-left: var(--space-2);
  color: var(--psd3-border);
}

.breadcrumb__item:last-child::after {
  content: none;
}

.breadcrumb__link {
  color: var(--psd3-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumb__link:hover {
  color: var(--psd3-link-hover);
  text-decoration: underline;
}

.breadcrumb__item--current .breadcrumb__text {
  color: var(--psd3-text-body);
  font-weight: 500;
}

/* ==========================================================================
   Home Page
   ========================================================================== */

.home-page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--psd3-bg-page);
}

.home-hero {
  padding: var(--space-16) var(--space-6);
  text-align: center;
  background: var(--psd3-bg-card);
  border-bottom: 1px solid var(--psd3-border-light);
}

.home-hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.home-hero-title {
  font-size: var(--text-4xl);
  font-weight: 400;
  color: var(--psd3-text-primary);
  margin-bottom: var(--space-6);
  line-height: 1.2;
}

.home-hero-image {
  margin-top: var(--space-8);
}

.home-hero-img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.home-hero-caption {
  margin-top: var(--space-4);
  color: var(--psd3-text-muted);
  font-size: var(--text-sm);
}

.home-hero-link {
  color: var(--psd3-link);
  font-weight: 500;
}

/* Architecture diagram */
.home-architecture {
  max-width: 900px;
  margin: var(--space-8) auto var(--space-12);
  padding: 0 var(--space-4);
}

.home-architecture__diagram {
  width: 100%;
  height: auto;
  opacity: 0.9;
  transition: opacity 0.2s ease;
}

.home-architecture__diagram:hover {
  opacity: 1;
}

@media (max-width: 768px) {
  .home-architecture {
    margin: var(--space-6) auto var(--space-8);
    overflow-x: auto;
  }

  .home-architecture__diagram {
    min-width: 600px;
  }
}

.home-section-title {
  font-size: var(--text-3xl);
  font-weight: 400;
  text-align: center;
  margin-bottom: var(--space-8);
  color: var(--psd3-text-primary);
}

/* ==========================================================================
   Showcase Section (4 rectangular boxes, typography-forward, hover screenshot)
   ========================================================================== */

.home-showcases {
  padding: var(--space-12) var(--space-6);
  background: var(--psd3-bg-page);
  overflow-x: clip;  /* Prevent horizontal scroll from full-width spine items */
}

.home-showcases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  max-width: 1200px;
  margin: 0 auto;
}

.home-showcase-box {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  padding: var(--space-8);
  background: var(--psd3-bg-card);
  border: 1px solid var(--psd3-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.home-showcase-box:hover {
  border-color: var(--psd3-gold);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}

/* Typography layer (hidden by default, shown on hover) */
.home-showcase-box__text {
  position: relative;
  z-index: 2;
  text-align: center;
  transition: opacity var(--transition-normal);
  opacity: 0;
}

.home-showcase-box:hover .home-showcase-box__text {
  opacity: 1;
}

.home-showcase-box__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--psd3-text-primary);
  margin-bottom: var(--space-2);
  line-height: 1.2;
}

.home-showcase-box__subtitle {
  font-size: var(--text-sm);
  color: var(--psd3-text-muted);
}

/* Screenshot layer (visible by default, hidden on hover) */
.home-showcase-box__screenshot {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 1;
  transition: opacity var(--transition-normal);
}

.home-showcase-box:hover .home-showcase-box__screenshot {
  opacity: 0;
}

.home-showcase-box__screenshot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Showcase badge */
.home-showcase-box__badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: white;
  background: var(--psd3-gold);
  border: none;
  border-radius: var(--radius-sm);
  z-index: 3;
}

/* Backend-specific badge colors */
.home-showcase-box__badge--js { background: #f7df1e; color: #000; }
.home-showcase-box__badge--python { background: #3776ab; }
.home-showcase-box__badge--erlang { background: #a90533; }
.home-showcase-box__badge--lua { background: #000080; }
.home-showcase-box__badge--wasm { background: #654ff0; }
.home-showcase-box__badge--nodejs { background: #339933; }
.home-showcase-box__badge--purescript { background: #14161a; }

/* ==========================================================================
   Spine Layout - Alternating showcases along a vertical red line
   ========================================================================== */

.home-showcases__spine-container {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-8) 0;
}

/* The vertical red spine */
.home-showcases__spine-container::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #c23b22;  /* Byrne red */
  transform: translateX(-50%);
}

/* Each spine item is a flex row with full-width background */
.spine-item {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  /* Full-width background while keeping content centered */
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  padding-left: max(var(--space-4), calc(50vw - 450px));
  padding-right: max(var(--space-4), calc(50vw - 450px));
  text-decoration: none;
  color: inherit;
  transition: background-color var(--transition-normal);
}

/* Hover effect - reinforce text/screenshot connection */
.spine-item:hover {
  text-decoration: none;
  background-color: rgba(194, 59, 34, 0.04);  /* Byrne red tint */
}

/* Odd items: card on left, screenshot on right */
.spine-item:nth-child(odd) {
  flex-direction: row;
}

.spine-item:nth-child(odd) .spine-item__card {
  text-align: right;
  padding-right: var(--space-8);
}

.spine-item:nth-child(odd) .spine-item__screenshot {
  padding-left: var(--space-8);
}

/* Even items: screenshot on left, card on right + zebra striping */
.spine-item:nth-child(even) {
  flex-direction: row-reverse;
  background-color: rgba(0, 0, 0, 0.02);
}

.spine-item:nth-child(even):hover {
  background-color: rgba(194, 59, 34, 0.04);  /* Byrne red tint on hover */
}

.spine-item:nth-child(even) .spine-item__card {
  text-align: left;
  padding-left: var(--space-8);
}

.spine-item:nth-child(even) .spine-item__screenshot {
  padding-right: var(--space-8);
}

/* Card side takes up half */
.spine-item__card {
  flex: 1;
  min-width: 0;
}

/* Screenshot side takes up half */
.spine-item__screenshot {
  flex: 1;
  min-width: 0;
}

.spine-item__screenshot img {
  width: 100%;
  max-width: 350px;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.spine-item:hover .spine-item__screenshot img {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

/* Badge styling */
.spine-item__badge {
  display: inline-block;
  padding: 0.15em 0.5em;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: white;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-2);
}

.spine-item__badge--js { background: #f7df1e; color: #1a1a1a; }
.spine-item__badge--python { background: #3776ab; }
.spine-item__badge--erlang { background: #a90533; }
.spine-item__badge--lua { background: #000080; }
.spine-item__badge--wasm { background: #654ff0; }
.spine-item__badge--nodejs { background: #339933; }
.spine-item__badge--purescript { background: #14161a; }
.spine-item__badge--library { background: #a08060; color: white; }  /* warm tan/beige */
.spine-item__badge--showcase { background: #a08060; color: white; } /* warm tan/beige */

/* Multiple badges container */
.spine-item__badges {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

/* Align badges to match text alignment */
.spine-item:nth-child(odd) .spine-item__badges {
  justify-content: flex-end;
}

.spine-item:nth-child(even) .spine-item__badges {
  justify-content: flex-start;
}

/* Title */
.spine-item__title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--psd3-text-primary);
  margin: 0 0 var(--space-1) 0;
  line-height: 1.2;
}

/* Subtitle / strapline */
.spine-item__subtitle {
  font-size: var(--text-sm);
  color: var(--psd3-text-muted);
  margin: 0;
  line-height: 1.4;
}

/* Responsive: stack vertically on mobile */
@media (max-width: 768px) {
  .home-showcases__spine-container::before {
    display: none;  /* Hide spine on mobile */
  }

  .spine-item,
  .spine-item:nth-child(odd),
  .spine-item:nth-child(even) {
    flex-direction: column;
    text-align: center;
  }

  .spine-item__card,
  .spine-item:nth-child(odd) .spine-item__card,
  .spine-item:nth-child(even) .spine-item__card {
    text-align: center;
    padding: 0;
    order: 1;
  }

  .spine-item__screenshot,
  .spine-item:nth-child(odd) .spine-item__screenshot,
  .spine-item:nth-child(even) .spine-item__screenshot {
    padding: 0;
    order: 2;
    margin-top: var(--space-4);
  }
}

/* Hylograph attribution section */
.home-hylograph-link {
  padding: var(--space-12) var(--space-6);
  background: var(--psd3-bg-subtle);
}

.hylograph-attribution {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  max-width: 800px;
  margin: 0 auto;
}

.hylograph-twins {
  width: 120px;
  height: auto;
  flex-shrink: 0;
}

.hylograph-message {
  font-size: var(--text-lg);
  color: var(--psd3-text-secondary);
  margin: 0;
  line-height: 1.5;
}

.hylograph-link {
  color: var(--psd3-gold);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-normal);
}

.hylograph-link:hover {
  color: var(--psd3-gold-dark);
  text-decoration: underline;
}

@media (max-width: 600px) {
  .hylograph-attribution {
    flex-direction: column;
    text-align: center;
  }

  .hylograph-twins {
    width: 80px;
  }

  .hylograph-message {
    font-size: var(--text-base);
  }
}

/* Take the Tour CTA box */
.home-tour-box {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  padding: var(--space-8);
  background: var(--psd3-gold);
  border: 2px solid var(--psd3-gold);
  border-radius: var(--radius-md);
  text-decoration: none;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.home-tour-box:hover {
  background: var(--psd3-gold-dark);
  border-color: var(--psd3-gold-dark);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
  transform: translateY(-2px);
}

.home-tour-box__content {
  text-align: center;
}

.home-tour-box__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--psd3-bg-page);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.home-tour-box__subtitle {
  font-size: var(--text-sm);
  color: var(--psd3-bg-page);
  opacity: 0.9;
}

/* ==========================================================================
   Documentation Section (2x2 grid, square-ish, responsive)
   ========================================================================== */

.home-docs {
  padding: var(--space-12) var(--space-6);
  background: var(--psd3-bg-subtle);
}

.home-docs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  max-width: 800px;
  margin: 0 auto;
}

@media (max-width: 600px) {
  .home-docs-grid {
    grid-template-columns: 1fr;
  }
}

/* Doc box - horizontal layout with LHS bookmark image */
.home-doc-box {
  display: flex;
  flex-direction: row;
  background: var(--psd3-bg-card);
  border: 1px solid var(--psd3-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-normal);
  text-decoration: none;
  aspect-ratio: 1;
}

.home-doc-box:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--psd3-gold);
  text-decoration: none;
}

.home-doc-box__image-container {
  width: 100px;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--psd3-bg-subtle);
}

.home-doc-box__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.home-doc-box__content {
  flex: 1;
  padding: var(--space-4) var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.home-doc-box-title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--psd3-text-primary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.home-doc-box-description {
  color: var(--psd3-text-muted);
  font-size: var(--text-sm);
  line-height: 1.5;
}

/* Tutorial cards */
.home-tutorial-card {
  display: block;
  padding: var(--space-6);
  background: var(--psd3-bg-card);
  border: 1px solid var(--psd3-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.home-tutorial-card:hover {
  box-shadow: var(--shadow-card);
  text-decoration: none;
}

.home-tutorial-card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--psd3-text-primary);
  margin-bottom: var(--space-2);
}

.home-tutorial-card-description {
  color: var(--psd3-text-muted);
  font-size: var(--text-sm);
}

/* Gallery sections */
.home-gallery-category {
  margin-bottom: var(--space-8);
}

.home-gallery-category-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--psd3-text-primary);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--psd3-border);
}

.home-examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-4);
}

.home-example-card {
  display: flex;
  flex-direction: column;
  background: var(--psd3-bg-card);
  border: 1px solid var(--psd3-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  transition: all var(--transition-normal);
}

.home-example-card:hover {
  box-shadow: var(--shadow-card);
  text-decoration: none;
}

.home-example-thumbnail {
  height: 150px;
  background: var(--psd3-bg-subtle);
  overflow: hidden;
}

.home-example-thumbnail-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.home-example-content {
  padding: var(--space-4);
}

.home-example-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--psd3-text-primary);
  margin-bottom: var(--space-1);
}

.home-example-description {
  font-size: var(--text-xs);
  color: var(--psd3-text-muted);
}

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

.site-footer {
  padding: var(--space-8) var(--space-6);
  background: var(--psd3-bg-card);
  border-top: 1px solid var(--psd3-border-light);
}

.site-footer__rule {
  border: none;
  border-top: 1px solid var(--psd3-border);
  margin-bottom: var(--space-6);
}

.site-footer__content {
  text-align: center;
}

.site-footer__link {
  color: var(--psd3-text-muted);
  font-size: var(--text-sm);
  text-decoration: none;
}

.site-footer__link:hover {
  color: var(--psd3-text-body);
}

/* ==========================================================================
   Layout Components (psd3-* utility classes)
   ========================================================================== */

.psd3-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.psd3-section {
  padding: var(--space-12) var(--space-6);
}

.psd3-flex {
  display: flex;
}

.psd3-flex-col {
  flex-direction: column;
}

.psd3-flex-center {
  align-items: center;
  justify-content: center;
}

.psd3-flex-between {
  justify-content: space-between;
}

.psd3-flex-wrap {
  flex-wrap: wrap;
}

.psd3-gap-2 { gap: var(--space-2); }
.psd3-gap-4 { gap: var(--space-4); }
.psd3-gap-6 { gap: var(--space-6); }
.psd3-gap-8 { gap: var(--space-8); }

/* ==========================================================================
   Card Components
   ========================================================================== */

.psd3-card {
  background: var(--psd3-bg-card);
  border: 1px solid var(--psd3-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-normal);
}

.psd3-card:hover {
  box-shadow: var(--shadow-card);
}

.psd3-card-body {
  padding: var(--space-6);
}

.psd3-card-header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--psd3-border);
  background: var(--psd3-bg-subtle);
}

/* ==========================================================================
   Badge Components (for tech tags)
   ========================================================================== */

.psd3-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-lg);
  font-size: var(--text-xs);
  font-weight: 600;
}

.psd3-badge-pure {
  background: rgba(0, 168, 204, 0.1);
  color: var(--psd3-pure);
  border: 1px solid rgba(0, 168, 204, 0.3);
}

.psd3-badge-python {
  background: rgba(233, 30, 140, 0.1);
  color: var(--psd3-python);
  border: 1px solid rgba(233, 30, 140, 0.3);
}

/* ==========================================================================
   Button Components
   ========================================================================== */

.psd3-btn {
  display: inline-block;
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.psd3-btn:hover {
  text-decoration: none;
}

.psd3-btn-primary {
  background: var(--psd3-gold);
  color: white;
  border-color: var(--psd3-gold);
}

.psd3-btn-primary:hover {
  background: var(--psd3-gold-light);
  border-color: var(--psd3-gold-light);
}

.psd3-btn-secondary {
  background: var(--psd3-bg-card);
  color: var(--psd3-text-body);
  border-color: var(--psd3-border);
}

.psd3-btn-secondary:hover {
  background: var(--psd3-bg-subtle);
  border-color: var(--psd3-text-muted);
}

/* ==========================================================================
   Typography Utilities
   ========================================================================== */

.psd3-text-center { text-align: center; }
.psd3-text-muted { color: var(--psd3-text-muted); }
.psd3-text-accent { color: var(--psd3-gold); }
.psd3-text-sm { font-size: var(--text-sm); }
.psd3-text-lg { font-size: var(--text-lg); }
.psd3-text-xl { font-size: var(--text-xl); }
.psd3-text-2xl { font-size: var(--text-2xl); }
.psd3-text-3xl { font-size: var(--text-3xl); }
.psd3-text-5xl { font-size: var(--text-5xl); }
.psd3-font-bold { font-weight: 700; }

/* ==========================================================================
   Spacing Utilities
   ========================================================================== */

.psd3-mb-2 { margin-bottom: var(--space-2); }
.psd3-mb-4 { margin-bottom: var(--space-4); }
.psd3-mb-6 { margin-bottom: var(--space-6); }
.psd3-mb-8 { margin-bottom: var(--space-8); }
.psd3-p-4 { padding: var(--space-4); }
.psd3-p-6 { padding: var(--space-6); }
.psd3-py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.psd3-py-16 { padding-top: var(--space-16); padding-bottom: var(--space-16); }

/* ==========================================================================
   Special Effects
   ========================================================================== */

.psd3-gradient-text {
  background: linear-gradient(90deg, var(--psd3-gold), var(--psd3-gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.psd3-glass {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--psd3-border);
}

.psd3-border-b {
  border-bottom: 1px solid var(--psd3-border);
}

.psd3-border-t {
  border-top: 1px solid var(--psd3-border);
}

/* ==========================================================================
   SVG/Diagram Styling (for architecture diagrams etc)
   ========================================================================== */

.psd3-diagram-box {
  fill: var(--psd3-bg-subtle);
  stroke: var(--psd3-border);
  stroke-width: 1;
}

.psd3-diagram-box-accent {
  fill: rgba(184, 134, 11, 0.1);
  stroke: var(--psd3-gold);
}

.psd3-diagram-box-purple {
  fill: rgba(123, 47, 247, 0.1);
  stroke: #7b2ff7;
}

.psd3-diagram-box-pink {
  fill: rgba(233, 30, 140, 0.1);
  stroke: var(--psd3-python);
}

.psd3-diagram-label {
  fill: var(--psd3-text-primary);
  font-size: 14px;
  font-weight: 600;
  text-anchor: middle;
}

.psd3-diagram-sublabel {
  fill: var(--psd3-text-muted);
  font-size: 11px;
  text-anchor: middle;
}

.psd3-diagram-arrow {
  stroke: var(--psd3-gold);
  stroke-width: 2;
  fill: none;
}

/* ==========================================================================
   404 Not Found
   ========================================================================== */

.not-found {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: var(--space-8);
}

.not-found h1 {
  font-size: var(--text-4xl);
  color: var(--psd3-text-primary);
  margin-bottom: var(--space-4);
}

.not-found p {
  color: var(--psd3-text-muted);
  margin-bottom: var(--space-6);
}

/* ==========================================================================
   Code Blocks
   ========================================================================== */

pre {
  background: var(--psd3-bg-subtle);
  border: 1px solid var(--psd3-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  overflow-x: auto;
  font-size: var(--text-sm);
  line-height: 1.6;
}

code {
  background: var(--psd3-bg-subtle);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
}

/* ==========================================================================
   Forms
   ========================================================================== */

input, select, textarea {
  background: var(--psd3-bg-card);
  border: 1px solid var(--psd3-border);
  border-radius: var(--radius-md);
  color: var(--psd3-text-body);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-base);
  font-family: inherit;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--psd3-gold);
  box-shadow: 0 0 0 2px rgba(184, 134, 11, 0.15);
}

button {
  cursor: pointer;
  font-family: inherit;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
  .site-nav-content {
    flex-wrap: wrap;
    gap: var(--space-4);
  }

  .site-nav-center {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .site-nav-right {
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-3);
  }

  .home-hero-title {
    font-size: var(--text-2xl);
  }

  .home-docs-grid {
    grid-template-columns: 1fr;
  }

  .home-doc-box__image-container {
    width: 80px;
  }
}

/* ==========================================================================
   Scrollytelling Tour
   ========================================================================== */

.tour-scrolly {
  min-height: 100vh;
  background: var(--psd3-bg-page);
}

.scrolly-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - 80px);
}

/* Fixed visualization panel */
.scrolly-fixed-panel {
  position: sticky;
  top: 80px;
  height: calc(100vh - 80px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--psd3-bg-card);
  border-right: 1px solid var(--psd3-border);
  padding: var(--space-6);
}

.scrolly-viz {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 4 / 3;
  background: white;
  border: 1px solid var(--psd3-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.scrolly-viz svg {
  width: 100%;
  height: 100%;
}

/* Axis typography - lighter weight */
.scrolly-viz .tick text,
.scrolly-viz .axis text {
  font-size: 10px;
  font-weight: 300;
  fill: #666;
}

.scrolly-viz .tick line,
.scrolly-viz .domain {
  stroke: #999;
  stroke-width: 1;
}

.scrolly-viz .plot-title,
.scrolly-viz text.title {
  font-size: 12px;
  font-weight: 500;
}

/* Anscombe quartet - extra light typography for small multiples */
.scrolly-viz .anscombe-plot .tick text {
  font-size: 8px;
  font-weight: 200;
  fill: #888;
}

.scrolly-viz .anscombe-plot .tick line,
.scrolly-viz .anscombe-plot .domain {
  stroke: #bbb;
  stroke-width: 0.5;
}

.scrolly-viz-placeholder {
  color: var(--psd3-text-muted);
  font-size: var(--text-sm);
}

/* Multi-line chart hover interaction */
.multi-line-chart .line {
  transition: stroke 0.15s ease, stroke-opacity 0.15s ease;
  cursor: pointer;
}

.multi-line-chart:hover .line {
  stroke: #ddd;
  stroke-opacity: 0.5;
}

.multi-line-chart .line:hover {
  stroke: #333;
  stroke-opacity: 1;
  stroke-width: 1.5;
}

/* PSD3 Tooltip */
.psd3-tooltip {
  background: rgba(0, 0, 0, 0.85);
  color: white;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 13px;
  line-height: 1.4;
  max-width: 250px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.psd3-tooltip strong {
  display: block;
  margin-bottom: 4px;
}

/* Step indicator dots */
.scrolly-step-indicator {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.scrolly-step-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--psd3-border);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
}

.scrolly-step-dot:hover {
  border-color: var(--psd3-gold);
}

.scrolly-step-dot.active {
  background: var(--psd3-gold);
  border-color: var(--psd3-gold);
}

/* Scrolling content panel */
.scrolly-scroll-panel {
  padding: var(--space-8);
  height: calc(100vh - 80px);  /* Constrain to viewport so it scrolls internally */
  overflow-y: auto;
}

/* Individual steps */
.scrolly-step {
  min-height: 80vh;
  padding: var(--space-8) 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 1px solid var(--psd3-border-light);
}

.scrolly-step:last-child {
  border-bottom: none;
  margin-bottom: 40vh; /* Extra scroll space at end */
}

.scrolly-step-number {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--psd3-gold);
  opacity: 0.3;
  margin-bottom: var(--space-2);
}

.scrolly-step-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--psd3-text-primary);
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

.scrolly-step-narrative {
  margin-bottom: var(--space-6);
}

.scrolly-step-narrative p {
  color: var(--psd3-text-body);
  line-height: 1.7;
  margin-bottom: var(--space-3);
  font-size: var(--text-base);
}

/* Code display */
.scrolly-step-code {
  background: #1e1e1e;
  color: #d4d4d4;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.scrolly-step-code .code-line {
  padding: 2px 0;
  transition: background 0.2s ease;
}

.scrolly-step-code .code-line.highlight {
  background: rgba(184, 134, 11, 0.2);
  border-left: 3px solid var(--psd3-gold);
  padding-left: var(--space-2);
  margin-left: -var(--space-2);
}

/* Insight callout */
.scrolly-step-insight {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border-left: 4px solid var(--psd3-gold);
  padding: var(--space-3) var(--space-4);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-weight: 500;
  color: var(--psd3-text-primary);
  font-size: var(--text-sm);
}

/* Mobile: stack panels */
@media (max-width: 900px) {
  .scrolly-container {
    grid-template-columns: 1fr;
  }

  .scrolly-fixed-panel {
    position: relative;
    top: 0;
    height: auto;
    min-height: 50vh;
    border-right: none;
    border-bottom: 1px solid var(--psd3-border);
  }

  .scrolly-step {
    min-height: auto;
    padding: var(--space-6) 0;
  }
}

/* ==========================================================================
   Motion Scrollytelling Tour
   ========================================================================== */

.motion-tour-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - 80px);
}

/* Fixed visualization panel */
.motion-viz-panel {
  position: sticky;
  top: 80px;
  height: calc(100vh - 80px);
  border-right: 1px solid var(--psd3-border);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--psd3-bg-secondary);
  padding: var(--space-6);
}

.motion-viz-content {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 5 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--psd3-bg-page);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.motion-viz-content svg {
  width: 100%;
  height: 100%;
}

/* Scrolling narrative panel */
.motion-scroll-panel {
  padding: var(--space-8);
  height: calc(100vh - 80px);
  overflow-y: auto;
}

/* Individual steps */
.motion-step {
  min-height: 80vh;
  padding: var(--space-8) 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 1px solid var(--psd3-border-light);
}

.motion-step:last-child {
  border-bottom: none;
  margin-bottom: 40vh; /* Extra scroll space at end */
}

.motion-step-content h3 {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--psd3-text-primary);
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

.motion-step-narrative {
  margin-bottom: var(--space-6);
}

.motion-step-narrative p {
  color: var(--psd3-text-body);
  line-height: 1.7;
  margin-bottom: var(--space-3);
  font-size: var(--text-base);
}

/* Code watermark with parallax effect - sits below narrative */
.motion-step-code {
  position: sticky;
  bottom: 10%;
  top: auto;
  margin: 0;
  margin-top: var(--space-4);
  padding: 0;
  font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--psd3-text-tertiary);
  opacity: 0.5;
  white-space: pre;
  pointer-events: none;
}

.motion-step-code code {
  background: none;
  padding: 0;
  font-size: inherit;
}

.motion-step-content {
  position: relative;
}

/* Motion scrolly visualization styles */
.motion-scrolly-viz circle {
  transition: opacity 0.3s ease;
}

/* Mobile: stack panels */
@media (max-width: 900px) {
  .motion-tour-container {
    grid-template-columns: 1fr;
  }

  .motion-viz-panel {
    position: relative;
    top: 0;
    height: auto;
    min-height: 50vh;
    border-right: none;
    border-bottom: 1px solid var(--psd3-border);
  }

  .motion-step {
    min-height: auto;
    padding: var(--space-6) 0;
  }

  .motion-step-code {
    display: none; /* Hide code watermark on mobile */
  }

  .motion-step-content {
    background: none;
    padding: 0;
  }
}

/* ==========================================================================
   Tour Index - Card Grid
   ========================================================================== */

.howto-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.howto-card {
  display: block;
  background: var(--psd3-bg-card);
  border: 1px solid var(--psd3-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-decoration: none;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.howto-card:hover {
  border-color: var(--psd3-gold);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.howto-card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--psd3-text-primary);
  margin-bottom: var(--space-2);
}

.howto-card__description {
  font-size: var(--text-sm);
  color: var(--psd3-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* Featured card variant */
.howto-card--featured {
  position: relative;
  border-color: var(--psd3-gold-light);
  background: linear-gradient(135deg, var(--psd3-bg-card) 0%, #fffcf5 100%);
}

.howto-card--featured:hover {
  border-color: var(--psd3-gold);
}

.howto-card__badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--psd3-gold-dark);
  background: rgba(184, 134, 11, 0.1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

/* Section intro text */
.docs-section-intro {
  color: var(--psd3-text-muted);
  font-size: var(--text-base);
  margin-top: var(--space-2);
  margin-bottom: var(--space-4);
}

/* ==========================================================================
   Force Playground Controls
   ========================================================================== */

.floating-panel {
  position: absolute;
  background: var(--psd3-bg-card, rgba(30, 30, 30, 0.95));
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-md, 8px);
  padding: var(--space-4, 1rem);
  z-index: 1000;
  max-width: 280px;
  backdrop-filter: blur(8px);
}

.floating-panel--top-right {
  top: 5rem;  /* More space from nav */
  right: 1.5rem;
}

.floating-panel--medium {
  min-width: 220px;
}

.floating-panel--wide {
  min-width: 260px;
  max-width: 320px;
}

.floating-panel__title {
  font-size: var(--text-lg, 1.1rem);
  font-weight: 600;
  color: var(--psd3-text-primary, #f0f0f0);
  margin: 0 0 var(--space-3, 0.75rem) 0;
  border-bottom: 1px solid var(--psd3-border, #404040);
  padding-bottom: var(--space-2, 0.5rem);
}

.control-group {
  margin-bottom: var(--space-3, 0.75rem);
}

.control-group h4 {
  font-size: var(--text-sm, 0.85rem);
  font-weight: 500;
  color: var(--psd3-text-muted, #a0a0a0);
  margin: 0 0 var(--space-2, 0.5rem) 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.panel-info-box {
  background: var(--psd3-bg-subtle, rgba(255, 255, 255, 0.05));
  border-radius: var(--radius-sm, 4px);
  padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  font-size: var(--text-sm, 0.85rem);
  color: var(--psd3-text-muted, #a0a0a0);
}

.panel-info-box p {
  margin: 0;
}

.panel-info-box p + p {
  margin-top: var(--space-1, 0.25rem);
}

.control-button {
  display: inline-block;
  padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  font-size: var(--text-sm, 0.85rem);
  font-weight: 500;
  border-radius: var(--radius-sm, 4px);
  border: 1px solid var(--psd3-border, #404040);
  background: var(--psd3-bg-subtle, rgba(255, 255, 255, 0.05));
  color: var(--psd3-text-primary, #f0f0f0);
  cursor: pointer;
  transition: all 0.15s ease;
}

.control-button:hover {
  background: var(--psd3-bg-card, rgba(50, 50, 50, 0.95));
  border-color: var(--psd3-gold, #b8860b);
}

.control-button--secondary {
  background: transparent;
}

.control-button--link {
  background: transparent;
  border: none;
  color: var(--psd3-gold, #b8860b);
  padding: var(--space-1, 0.25rem) 0;
  text-decoration: underline;
}

.control-button--link:hover {
  color: var(--psd3-gold-light, #daa520);
}

/* Category filter buttons */
.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2, 0.5rem);
}

.category-button {
  padding: var(--space-1, 0.25rem) var(--space-2, 0.5rem);
  font-size: var(--text-xs, 0.75rem);
  font-weight: 500;
  border-radius: var(--radius-sm, 4px);
  border: 2px solid;
  cursor: pointer;
  transition: all 0.15s ease;
}

.category-button--active {
  color: white;
}

.category-button--inactive {
  background: transparent;
  color: var(--psd3-text-muted, #a0a0a0);
  opacity: 0.7;
}

.category-button--inactive:hover {
  opacity: 1;
}

/* Force toggle buttons - styled like category buttons */
.force-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2, 0.5rem);
}

.toggle-button {
  padding: var(--space-1, 0.25rem) var(--space-3, 0.75rem);
  font-size: var(--text-xs, 0.75rem);
  font-weight: 500;
  border-radius: var(--radius-sm, 4px);
  border: 2px solid var(--psd3-gold, #b8860b);
  cursor: pointer;
  transition: all 0.15s ease;
}

.toggle-button--on {
  background: var(--psd3-gold, #b8860b);
  color: white;
}

.toggle-button--off {
  background: transparent;
  color: var(--psd3-text-muted, #a0a0a0);
  border-color: var(--psd3-border, #404040);
  opacity: 0.7;
}

.toggle-button--off:hover {
  opacity: 1;
  border-color: var(--psd3-gold, #b8860b);
}

/* Full-width button */
.control-button--full {
  width: 100%;
  text-align: center;
}

/* Footer control group (less prominent) */
.control-group--footer {
  margin-top: var(--space-4, 1rem);
  padding-top: var(--space-3, 0.75rem);
  border-top: 1px solid var(--psd3-border, #404040);
  margin-bottom: 0;
}

/* Active state for preset buttons */
.control-button--active {
  background: var(--psd3-gold, #b8860b);
  color: white;
  border-color: var(--psd3-gold, #b8860b);
}

/* Button row layout */
.button-row {
  display: flex;
  gap: var(--space-2, 0.5rem);
}

/* ==========================================================================
   Semiotic Standard Control Panel
   Inspired by Ron Cobb's iconography for Alien (1979)
   ========================================================================== */

/* Force Playground dark background with starfield */
.force-playground-viz {
  background: rgba(20, 18, 15, 1);
  position: relative;
  overflow: hidden;
}

.force-playground-viz::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.8) 0%, transparent 100%),
    radial-gradient(1px 1px at 85% 15%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 45% 8%, rgba(255,255,255,0.9) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 35%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 25% 45%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(2px 2px at 92% 55%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 5% 65%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 55% 72%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 78% 80%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1px 1px at 30% 88%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 62% 25%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 18% 78%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 88% 42%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 38% 58%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 95% 90%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 8% 35%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 72% 62%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(2px 2px at 52% 95%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 42% 30%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 15% 52%, rgba(255,255,255,0.6) 0%, transparent 100%);
}

.semiotic-panel {
  position: absolute;
  top: 5rem;
  right: 1.5rem;
  background: rgba(235, 225, 210, 0.95);  /* Light cream/parchment */
  border: 3px solid #8b4513;  /* Rusty orange-brown */
  border-radius: 4px;
  padding: 12px;
  z-index: 1000;
  backdrop-filter: blur(4px);
  box-shadow:
    inset 0 0 15px rgba(139, 69, 19, 0.15),
    0 4px 20px rgba(0, 0, 0, 0.3);
}

.semiotic-row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.semiotic-row:last-child {
  margin-bottom: 0;
}

.semiotic-row--footer {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 2px solid rgba(139, 69, 19, 0.5);
}

.semiotic-button {
  --semiotic-color: #c41e3a;  /* Default to red */

  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 6px;

  background: rgba(30, 25, 20, 0.9);
  border: 2px solid rgba(100, 80, 60, 0.6);
  border-radius: 3px;
  cursor: pointer;

  transition: all 0.15s ease;

  /* Weathered/industrial feel */
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    inset 0 -1px 0 rgba(0, 0, 0, 0.3);
}

.semiotic-button:hover {
  background: rgba(50, 40, 30, 0.95);
  border-color: var(--semiotic-color, #c41e3a);
}

.semiotic-button--active {
  background: rgba(60, 45, 30, 0.95);
  border-color: var(--semiotic-color, #c41e3a);
  box-shadow:
    inset 0 0 10px rgba(0, 0, 0, 0.4),
    0 0 8px rgba(196, 30, 58, 0.3);
}

.semiotic-button--active .semiotic-shape,
.semiotic-button--active .semiotic-shape-stroke {
  fill: var(--semiotic-color, #c41e3a);
  stroke: var(--semiotic-color, #c41e3a);
}

.semiotic-button--active .semiotic-line,
.semiotic-button--active .semiotic-line-thin,
.semiotic-button--active .semiotic-arc {
  stroke: var(--semiotic-color, #c41e3a);
}

/* Wide button (for regenerate) */
.semiotic-button--wide {
  width: auto;
  padding: 6px 14px;
  gap: 8px;
}

.semiotic-label {
  font-family: 'Courier New', monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: #5a4a3a;  /* Dark brown for light panel */
  text-transform: uppercase;
}

/* SVG Icon Styling */
.semiotic-icon {
  width: 32px;
  height: 32px;
}

.semiotic-icon--inline {
  width: 20px;
  height: 20px;
}

/* Filled shapes */
.semiotic-shape {
  fill: #6b6b5a;
  transition: fill 0.15s ease;
}

/* Stroked shapes (not filled) */
.semiotic-shape-stroke {
  fill: none;
  stroke: #6b6b5a;
  stroke-width: 2;
  transition: stroke 0.15s ease;
}

/* Lines */
.semiotic-line {
  stroke: #6b6b5a;
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke 0.15s ease;
}

.semiotic-line-thin {
  stroke: #4a4a40;
  stroke-width: 1.5;
  stroke-dasharray: 2, 2;
  transition: stroke 0.15s ease;
}

/* Arc path */
.semiotic-arc {
  fill: none;
  stroke: #6b6b5a;
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke 0.15s ease;
}

/* Hover states for icons */
.semiotic-button:hover .semiotic-shape {
  fill: #8b8b7a;
}

.semiotic-button:hover .semiotic-shape-stroke {
  stroke: #8b8b7a;
}

.semiotic-button:hover .semiotic-line,
.semiotic-button:hover .semiotic-line-thin,
.semiotic-button:hover .semiotic-arc {
  stroke: #8b8b7a;
}

/* Category-specific colors on active */
.semiotic-button[style*="--semiotic-color: #1e5a8c"].semiotic-button--active {
  box-shadow:
    inset 0 0 10px rgba(0, 0, 0, 0.4),
    0 0 8px rgba(30, 90, 140, 0.4);
}

.semiotic-button[style*="--semiotic-color: #d4a024"].semiotic-button--active {
  box-shadow:
    inset 0 0 10px rgba(0, 0, 0, 0.4),
    0 0 8px rgba(212, 160, 36, 0.4);
}

.semiotic-button[style*="--semiotic-color: #2d8b57"].semiotic-button--active {
  box-shadow:
    inset 0 0 10px rgba(0, 0, 0, 0.4),
    0 0 8px rgba(45, 139, 87, 0.4);
}

/* ==========================================================================
   VT-100 Terminal Page (Lua Edge Showcase)
   Retro terminal aesthetic - green phosphor on black
   ========================================================================== */

.terminal-page {
  background: #0a0a08;
  min-height: 100vh;
}

.terminal-page .site-nav {
  background: transparent;
  border-bottom: 1px solid #1a3a1a;
}

.terminal-page .nav-logo__text {
  color: #33ff33;
}

.terminal-page .nav-title {
  color: #33ff33;
}

.terminal-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1rem;
}

.terminal-screen {
  background: #0a0a08;
  border: 3px solid #1a3a1a;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow:
    inset 0 0 100px rgba(0, 40, 0, 0.3),
    0 0 20px rgba(51, 255, 51, 0.1);
  /* CRT curvature effect */
  position: relative;
}

.terminal-screen::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    repeating-linear-gradient(
      0deg,
      rgba(0, 0, 0, 0.1) 0px,
      rgba(0, 0, 0, 0.1) 1px,
      transparent 1px,
      transparent 2px
    );
  pointer-events: none;
  border-radius: 5px;
}

.terminal-header {
  font-family: 'VT323', 'Courier New', monospace;
  font-size: 1.5rem;
  color: #33ff33;
  text-shadow: 0 0 10px #33ff33;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #1a3a1a;
}

.terminal-blink {
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.terminal-content {
  font-family: 'VT323', 'Courier New', monospace;
}

.terminal-section {
  margin-bottom: 2rem;
}

.terminal-section-header {
  font-family: 'VT323', 'Courier New', monospace;
  font-size: 1.1rem;
  color: #66ff66;
  text-shadow: 0 0 5px #33ff33;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.terminal-pre {
  font-family: 'VT323', 'Courier New', monospace;
  font-size: 0.95rem;
  line-height: 1.4;
  color: #33ff33;
  text-shadow: 0 0 3px rgba(51, 255, 51, 0.5);
  margin: 0;
  white-space: pre;
  overflow-x: auto;
  /* Override global pre styling */
  background: transparent;
  border: none;
  padding: 0;
}

/* Highlight important text */
.terminal-pre strong,
.terminal-highlight {
  color: #88ff88;
  text-shadow: 0 0 8px #33ff33;
}

/* Scrollbar styling for terminal */
.terminal-screen::-webkit-scrollbar,
.terminal-pre::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.terminal-screen::-webkit-scrollbar-track,
.terminal-pre::-webkit-scrollbar-track {
  background: #0a0a08;
}

.terminal-screen::-webkit-scrollbar-thumb,
.terminal-pre::-webkit-scrollbar-thumb {
  background: #1a3a1a;
  border-radius: 4px;
}

.terminal-screen::-webkit-scrollbar-thumb:hover,
.terminal-pre::-webkit-scrollbar-thumb:hover {
  background: #2a5a2a;
}

/* Import VT323 font */
@import url('https://fonts.googleapis.com/css2?family=VT323&display=swap');

/* Amber variant (uncomment to switch from green to amber) */
/*
.terminal-header,
.terminal-section-header,
.terminal-pre {
  color: #ffb000;
  text-shadow: 0 0 5px #ff8c00;
}
.terminal-screen {
  box-shadow:
    inset 0 0 100px rgba(40, 25, 0, 0.3),
    0 0 20px rgba(255, 176, 0, 0.1);
}
*/

/* ==========================================================================
   POLYGLOT Acrostic Hero - Revolutionary Poster Layout
   ========================================================================== */

/* No nav on home page */
.home-page--no-nav {
  padding-top: var(--space-4);
}

/* Poster-style hero: two columns */
.home-hero--poster {
  display: grid;
  grid-template-columns: 1fr 2fr;
  grid-template-rows: auto auto;
  gap: var(--space-4);
  min-height: 50vh;
  padding: var(--space-4);
}

.home-hero__acrostic-col {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  overflow: visible;
}

.home-hero__image-col {
  display: flex;
  align-items: center;
  justify-content: center;
}

.home-hero__image-placeholder {
  width: 100%;
  height: 100%;
  min-height: 300px;
  background: var(--psd3-bg-elevated);
  border: 2px dashed var(--psd3-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--psd3-text-muted);
  font-size: var(--text-xl);
}

/* Showcases span full width below */
.home-hero--poster .home-showcases-grid {
  grid-column: 1 / -1;
}

.home-acrostic {
  font-family: 'Futura', 'Futura PT', 'Century Gothic', 'Arial', sans-serif;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.15;
  transform: translateX(-4rem) rotate(-12deg);
  transform-origin: top left;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-top: 5rem;
  margin-left: 0;
}

/* Acrostic is a 3-column CSS grid */
.home-acrostic {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: baseline;  /* Force baseline alignment across each row */
  white-space: nowrap;
}

/* Word wrapper uses display:contents so children participate in parent grid */
.acrostic-word {
  display: contents;
}

/* Left-hand side: right-aligned to kiss the letter */
.acrostic-lhs {
  justify-self: end;
  text-align: right;
}

/* Center letter column: the POLYGLOT spine with border */
.acrostic-letter {
  text-align: center;
  justify-self: center;
  padding: 0 0.15em;
  background: rgba(255, 255, 255, 0.85);
  border-left: 1px solid rgba(26, 26, 26, 0.12);
  border-right: 1px solid rgba(26, 26, 26, 0.12);
  /* Styling */
  color: #c23b22;
  cursor: pointer;
  transition: all 0.2s ease;
}

.acrostic-letter:hover {
  color: #1e5aa8;  /* Byrne blue on hover */
}

/* First and last letters get top/bottom borders */
.acrostic-word:first-child .acrostic-letter {
  border-top: 1px solid rgba(26, 26, 26, 0.12);
  padding-top: 0.1em;
}

.acrostic-word:last-child .acrostic-letter {
  border-bottom: 1px solid rgba(26, 26, 26, 0.12);
  padding-bottom: 0.1em;
}

/* Right-hand side: left-aligned from the letter */
.acrostic-rhs {
  justify-self: start;
  text-align: left;
}

/* Primary words: purescript, graphical, exploration - Byrne red */
.acrostic-word--primary {
  color: #c23b22;
}

/* Backend words: node, erlang, python, lua, rust - black */
.acrostic-word--backend {
  color: #1a1a1a;
}


/* When hovering acrostic letter, highlight corresponding showcase box */
.acrostic-letter:hover ~ .home-showcases-grid .home-showcase-box[data-backend],
.acrostic-letter[data-backend="js"]:hover ~ .home-showcases-grid .home-showcase-box__badge--js,
.acrostic-letter[data-backend="python"]:hover ~ .home-showcases-grid .home-showcase-box__badge--python,
.acrostic-letter[data-backend="erlang"]:hover ~ .home-showcases-grid .home-showcase-box__badge--erlang,
.acrostic-letter[data-backend="lua"]:hover ~ .home-showcases-grid .home-showcase-box__badge--lua,
.acrostic-letter[data-backend="wasm"]:hover ~ .home-showcases-grid .home-showcase-box__badge--wasm,
.acrostic-letter[data-backend="nodejs"]:hover ~ .home-showcases-grid .home-showcase-box__badge--nodejs {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(184, 134, 11, 0.3);
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .home-acrostic {
    font-size: 0.9rem;
    padding: var(--space-4);
  }
}

/* =============================================================================
   Concept Graph (Hero Image)
   ============================================================================= */

.concept-graph {
  width: 100%;
  height: 100%;
  min-height: 300px;
  background: rgba(0, 0, 0, 0.02);
  border-radius: 4px;
}

/* Links */
.concept-graph__link {
  stroke: rgba(0, 0, 0, 0.15);
  stroke-width: 1;
}

/* Node circles by category */
.concept-graph__circle {
  fill: #666;
  stroke: #fff;
  stroke-width: 1.5;
  cursor: grab;
  transition: fill 0.2s ease;
}

.concept-graph__circle:active {
  cursor: grabbing;
}

/* Category colors */
/* Byrne's Euclid palette - primary colors */
.concept-graph__node--core .concept-graph__circle {
  fill: #c23b22;  /* Byrne red - PureScript */
}

.concept-graph__node--backend .concept-graph__circle {
  fill: #1a1a1a;  /* Black - compile targets */
}

.concept-graph__node--runtime .concept-graph__circle {
  fill: #1e5aa8;  /* Byrne blue - runtimes */
}

.concept-graph__node--concept .concept-graph__circle {
  fill: #f4c430;  /* Byrne yellow - concepts */
}

.concept-graph__node--library .concept-graph__circle {
  fill: #c23b22;  /* Byrne red - PSD3 libraries */
}

.concept-graph__node--ext-library .concept-graph__circle {
  fill: #1e5aa8;  /* Byrne blue - external libraries */
}

.concept-graph__node--showcase .concept-graph__circle {
  fill: #f4c430;  /* Byrne yellow - showcases */
}

.concept-graph__node--domain .concept-graph__circle {
  fill: #1a1a1a;  /* Black - domains */
}

/* Node labels - rotated to match acrostic, right-aligned under node */
.concept-graph__label {
  font-family: 'Futura', 'Futura PT', 'Century Gothic', 'Arial', sans-serif;
  font-size: 7px;
  fill: #1a1a1a;
  pointer-events: none;
  user-select: none;
  /* Rotation done via SVG transform attribute */
}

.concept-graph__node--core .concept-graph__label {
  font-size: 9px;
  font-weight: bold;
  fill: #c23b22;
}

/* Hover states */
.concept-graph__node:hover .concept-graph__circle {
  filter: brightness(1.2);
}

/* Updated concept graph styles for tighter layout */

/* Smaller label font */
.concept-graph__label {
  font-size: 6px;
}

.concept-graph__node--core .concept-graph__label {
  font-size: 8px;
}

/* Link type colors */
/* Link types - Byrne palette, subtle */
.concept-graph__link--builds-to {
  stroke: rgba(26, 26, 26, 0.4);  /* Black - structural */
  stroke-width: 1.5;
}

.concept-graph__link--runs-on {
  stroke: rgba(30, 90, 168, 0.4);  /* Blue - runtime */
  stroke-width: 1.5;
}

.concept-graph__link--enables {
  stroke: rgba(244, 196, 48, 0.3);  /* Yellow - conceptual (fainter) */
  stroke-width: 1;
}

.concept-graph__link--uses-library {
  stroke: rgba(194, 59, 34, 0.4);  /* Red - library */
  stroke-width: 1.5;
}

/* ==========================================================================
   SimpleTreeBuilder & ChartBuilder Components
   ========================================================================== */

/* Shared builder layout */
.simple-tree-builder,
.chart-builder-page {
  min-height: 100vh;
  background: var(--psd3-bg-page, #1a1a1a);
  color: var(--psd3-text-primary, #f0f0f0);
}

.builder-container,
.chart-builder-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-6, 1.5rem);
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-6, 1.5rem);
  min-height: calc(100vh - 60px);
}

.builder-left-panel,
.builder-right-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4, 1rem);
}

/* Sections */
.input-section,
.examples-section,
.type-selector-section,
.preview-section {
  background: var(--psd3-bg-elevated, #2a2a2a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-md, 8px);
  padding: var(--space-4, 1rem);
}

.section-title {
  font-size: var(--text-lg, 1.125rem);
  font-weight: 600;
  color: var(--psd3-text-primary, #f0f0f0);
  margin: 0 0 var(--space-3, 0.75rem) 0;
  border-bottom: 1px solid var(--psd3-border, #404040);
  padding-bottom: var(--space-2, 0.5rem);
}

/* Input controls */
.input-controls {
  display: flex;
  gap: var(--space-2, 0.5rem);
  align-items: flex-start;
}

.emmet-input {
  flex: 1;
  background: var(--psd3-bg-page, #1a1a1a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
  color: var(--psd3-text-primary, #f0f0f0);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: var(--text-sm, 0.875rem);
  padding: var(--space-3, 0.75rem);
  resize: vertical;
  min-height: 80px;
}

.emmet-input::placeholder {
  color: var(--psd3-text-muted, #808080);
}

.emmet-input:focus {
  outline: none;
  border-color: var(--psd3-gold, #b8860b);
}

.clear-button {
  background: var(--psd3-bg-elevated, #2a2a2a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
  color: var(--psd3-text-secondary, #a0a0a0);
  padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  cursor: pointer;
  font-size: var(--text-sm, 0.875rem);
  transition: all 0.15s ease;
}

.clear-button:hover:not(:disabled) {
  background: var(--psd3-border, #404040);
  color: var(--psd3-text-primary, #f0f0f0);
}

.clear-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Parse status */
.parse-status {
  padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  border-radius: var(--radius-sm, 4px);
  font-size: var(--text-sm, 0.875rem);
  margin-top: var(--space-2, 0.5rem);
}

.parse-status.info {
  background: var(--psd3-bg-page, #1a1a1a);
  color: var(--psd3-text-muted, #808080);
  border: 1px solid var(--psd3-border, #404040);
}

.parse-status.error {
  background: rgba(194, 59, 34, 0.15);
  color: #e57373;
  border: 1px solid rgba(194, 59, 34, 0.3);
}

.parse-status.success {
  background: rgba(76, 175, 80, 0.15);
  color: #81c784;
  border: 1px solid rgba(76, 175, 80, 0.3);
}

/* Examples section */
.examples-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2, 0.5rem);
}

.example-item {
  padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  background: var(--psd3-bg-page, #1a1a1a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
  cursor: pointer;
  transition: all 0.15s ease;
}

.example-item:hover {
  border-color: var(--psd3-gold, #b8860b);
  background: var(--psd3-bg-elevated, #2a2a2a);
}

.example-item--selected {
  border-color: var(--psd3-gold, #b8860b);
  background: rgba(184, 134, 11, 0.1);
}

.example-item__name {
  font-weight: 600;
  color: var(--psd3-text-primary, #f0f0f0);
  font-size: var(--text-sm, 0.875rem);
}

.example-item__description {
  color: var(--psd3-text-muted, #808080);
  font-size: var(--text-xs, 0.75rem);
  margin-top: var(--space-1, 0.25rem);
}

.example-item__expr {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: var(--text-xs, 0.75rem);
  color: var(--psd3-gold, #b8860b);
  background: var(--psd3-bg-elevated, #2a2a2a);
  padding: var(--space-1, 0.25rem) var(--space-2, 0.5rem);
  border-radius: var(--radius-sm, 4px);
  margin-top: var(--space-1, 0.25rem);
  display: inline-block;
}

/* Type selector */
.type-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2, 0.5rem);
}

.type-card {
  padding: var(--space-3, 0.75rem);
  background: var(--psd3-bg-page, #1a1a1a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
  cursor: pointer;
  transition: all 0.15s ease;
}

.type-card:hover {
  border-color: var(--psd3-gold, #b8860b);
}

.type-card--selected {
  border-color: var(--psd3-gold, #b8860b);
  background: rgba(184, 134, 11, 0.1);
}

.type-card__name {
  font-weight: 600;
  color: var(--psd3-text-primary, #f0f0f0);
}

.type-card__fields {
  font-size: var(--text-xs, 0.75rem);
  color: var(--psd3-text-muted, #808080);
  margin-top: var(--space-1, 0.25rem);
}

/* Preview section */
.preview-container {
  background: var(--psd3-bg-page, #1a1a1a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-placeholder {
  color: var(--psd3-text-muted, #808080);
  font-style: italic;
}

#simple-tree-viz {
  width: 100%;
  height: 100%;
  min-height: 400px;
}

/* ChartBuilder specific */
.builder-header {
  margin-bottom: var(--space-4, 1rem);
}

.builder-title {
  font-size: var(--text-2xl, 1.5rem);
  font-weight: 600;
  color: var(--psd3-text-primary, #f0f0f0);
  margin: 0 0 var(--space-2, 0.5rem) 0;
}

.builder-subtitle {
  color: var(--psd3-text-muted, #808080);
  margin: 0;
}

.chart-type-tabs {
  display: flex;
  gap: var(--space-2, 0.5rem);
  margin-top: var(--space-4, 1rem);
}

.chart-type-tab {
  padding: var(--space-2, 0.5rem) var(--space-4, 1rem);
  background: var(--psd3-bg-elevated, #2a2a2a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
  color: var(--psd3-text-secondary, #a0a0a0);
  cursor: pointer;
  transition: all 0.15s ease;
}

.chart-type-tab:hover {
  border-color: var(--psd3-gold, #b8860b);
}

.chart-type-tab--active {
  background: var(--psd3-gold, #b8860b);
  color: white;
  border-color: var(--psd3-gold, #b8860b);
}

.builder-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4, 1rem);
}

.builder-panel {
  background: var(--psd3-bg-elevated, #2a2a2a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-md, 8px);
  padding: var(--space-4, 1rem);
}

.builder-panel__title {
  font-size: var(--text-base, 1rem);
  font-weight: 600;
  color: var(--psd3-text-primary, #f0f0f0);
  margin: 0 0 var(--space-3, 0.75rem) 0;
}

#chart-preview,
#ast-tree-preview {
  width: 100%;
  min-height: 300px;
  background: var(--psd3-bg-page, #1a1a1a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
}

.builder-footer {
  margin-top: var(--space-4, 1rem);
  padding-top: var(--space-4, 1rem);
  border-top: 1px solid var(--psd3-border, #404040);
}

/* Responsive */
@media (max-width: 900px) {
  .builder-container,
  .chart-builder-content {
    grid-template-columns: 1fr;
  }
  
  .builder-panels {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   SimpleTreeBuilder - Type Cards & Examples (TreeBuilder3 style)
   ========================================================================== */

/* Section subtitle */
.section-subtitle {
  font-size: var(--text-base, 1rem);
  font-weight: 600;
  color: var(--psd3-text-primary, #f0f0f0);
  margin: 0 0 var(--space-3, 0.75rem) 0;
}

/* Types grid */
.types-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-2, 0.5rem);
}

/* Type card - styled like TreeBuilder3 type cards */
.type-card {
  background: var(--psd3-bg-elevated, #2a2a2a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.15s ease;
}

.type-card:hover {
  border-color: var(--psd3-gold, #b8860b);
}

.type-card.selected {
  border-color: var(--psd3-gold, #b8860b);
  box-shadow: 0 0 0 1px var(--psd3-gold, #b8860b);
}

/* Type name header - colored like TreeBuilder3 */
.type-name {
  padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  font-weight: 600;
  font-size: var(--text-sm, 0.875rem);
  color: white;
  background: var(--psd3-red, #c23b22);
}

/* Different colors for different types */
.type-card:nth-child(1) .type-name { background: #c23b22; } /* Point - red */
.type-card:nth-child(2) .type-name { background: #6b8e23; } /* Node - olive */
.type-card:nth-child(3) .type-name { background: #4682b4; } /* Country - steel blue */
.type-card:nth-child(4) .type-name { background: #daa520; } /* Letter - goldenrod */
.type-card:nth-child(5) .type-name { background: #9370db; } /* Board - medium purple */

/* Type fields container */
.type-fields {
  padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  background: var(--psd3-bg-page, #1a1a1a);
}

/* Individual field row */
.type-field {
  font-size: var(--text-xs, 0.75rem);
  line-height: 1.6;
  color: var(--psd3-text-secondary, #a0a0a0);
}

.field-name {
  color: var(--psd3-text-primary, #f0f0f0);
  font-weight: 500;
}

.field-type {
  color: var(--psd3-text-muted, #808080);
}

/* Example cards - updated styling */
.example-card {
  padding: var(--space-3, 0.75rem);
  background: var(--psd3-bg-page, #1a1a1a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
  cursor: pointer;
  transition: all 0.15s ease;
  margin-bottom: var(--space-2, 0.5rem);
}

.example-card:hover {
  border-color: var(--psd3-gold, #b8860b);
  background: var(--psd3-bg-elevated, #2a2a2a);
}

.example-card.selected {
  border-color: var(--psd3-gold, #b8860b);
  background: rgba(184, 134, 11, 0.1);
}

.example-name {
  font-weight: 600;
  color: var(--psd3-text-primary, #f0f0f0);
  font-size: var(--text-sm, 0.875rem);
  margin-bottom: var(--space-1, 0.25rem);
}

.example-description {
  color: var(--psd3-text-muted, #808080);
  font-size: var(--text-xs, 0.75rem);
  margin-bottom: var(--space-2, 0.5rem);
}

.example-code {
  display: block;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: var(--text-xs, 0.75rem);
  color: var(--psd3-gold, #b8860b);
  background: var(--psd3-bg-elevated, #2a2a2a);
  padding: var(--space-2, 0.5rem);
  border-radius: var(--radius-sm, 4px);
  overflow-x: auto;
  white-space: nowrap;
}

/* Tree visualization container */
.tree-visualization {
  background: var(--psd3-bg-page, #1a1a1a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
  min-height: 400px;
  width: 100%;
}

.tree-visualization svg {
  display: block;
}

/* Preview section */
.preview-section {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.preview-section .tree-visualization {
  flex: 1;
}

/* Type selector section */
.type-selector-section {
  max-height: 50%;
  overflow-y: auto;
}

/* ==========================================================================
   TreeBuilder3 - AST Presets Panel (top-center)
   ========================================================================== */

.floating-panel--top-center {
  position: absolute;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
}

.tree-builder3-ast-panel {
  background: rgba(26, 26, 26, 0.9);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-md, 8px);
  padding: var(--space-2, 0.5rem);
  backdrop-filter: blur(8px);
}

.ast-preset-row {
  display: flex;
  gap: var(--space-2, 0.5rem);
  flex-wrap: wrap;
  justify-content: center;
}

.ast-preset-card {
  background: var(--psd3-bg-elevated, #2a2a2a);
  border: 1px solid var(--psd3-border, #404040);
  border-radius: var(--radius-sm, 4px);
  padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
  min-width: 80px;
}

.ast-preset-card:hover {
  border-color: var(--psd3-gold, #b8860b);
  background: var(--psd3-bg-page, #1a1a1a);
}

.ast-preset-card--selected {
  border-color: var(--psd3-gold, #b8860b);
  background: rgba(184, 134, 11, 0.15);
  box-shadow: 0 0 0 1px var(--psd3-gold, #b8860b);
}

.ast-preset-card__name {
  font-weight: 600;
  font-size: var(--text-sm, 0.875rem);
  color: var(--psd3-text-primary, #f0f0f0);
}

.ast-preset-card__desc {
  font-size: var(--text-xs, 0.75rem);
  color: var(--psd3-text-muted, #808080);
  margin-top: var(--space-1, 0.25rem);
}

/* Fullscreen container needs position relative for floating panels */
.fullscreen-container {
  position: relative;
  min-height: calc(100vh - 60px);
}

.tree-builder3-viz-container {
  display: flex;
  flex-direction: column;
}

.fullscreen-viz {
  flex: 1;
  min-height: 600px;
}

.svg-container {
  width: 100%;
  height: 100%;
}

.svg-container svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* ==========================================================================
   Original Editorial Styles - SimpleTreeBuilder, ChartBuilder, TreeBuilder3
   (From PureScript Tagless D3 docs/styles)
   ========================================================================== */

/* --- Simple Tree Builder Editorial Theme Override --- */
.simple-tree-builder {
  --color-beige-base: #D4C9A8;
  --color-beige-light: #E8E0CC;
  --color-beige-dark: #C9B8A0;
  --color-beige-card: #F5F2E8;
  --color-line: #999999;
  --color-text-dark: #333333;
  --color-text-muted: #666666;
  --color-red-accent: #E63946;
  --color-green-accent: #2CA02C;
  --color-teal: #5A8A8A;
  --font-mono: 'Courier New', 'Courier', Monaco, monospace;
  --font-size-tiny: 0.75rem;
  --font-size-small: 0.875rem;
  --font-size-body: 1rem;
  --font-size-large: 1.125rem;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --transition-fast: 150ms ease-in-out;
  --border-thin: 1px solid var(--color-line);
  --border-thick: 2px solid var(--color-line);
  
  min-height: 100vh;
  background-color: var(--color-beige-light);
  font-family: var(--font-mono);
  color: var(--color-text-dark);
}

.simple-tree-builder .builder-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  min-height: calc(100vh - 60px);
  background: transparent;
  padding: 0;
  max-width: none;
}

.simple-tree-builder .builder-left-panel {
  border-right: 2px solid var(--color-line);
  background-color: var(--color-beige-card);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  overflow-y: auto;
}

.simple-tree-builder .builder-right-panel {
  background-color: var(--color-beige-card);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  overflow-y: auto;
}

.simple-tree-builder .input-section,
.simple-tree-builder .examples-section,
.simple-tree-builder .type-selector-section,
.simple-tree-builder .preview-section {
  background: transparent;
  border: none;
  padding: 0;
}

.simple-tree-builder .section-title {
  font-size: var(--font-size-large);
  font-weight: 600;
  margin: 0;
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.simple-tree-builder .section-subtitle {
  font-size: var(--font-size-body);
  font-weight: 600;
  margin: 0;
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.simple-tree-builder .emmet-input {
  width: 100%;
  padding: var(--spacing-md);
  font-family: var(--font-mono);
  font-size: var(--font-size-body);
  border: 1px solid var(--color-line);
  background-color: white;
  color: var(--color-text-dark);
  resize: vertical;
  min-height: 100px;
}

.simple-tree-builder .emmet-input:focus {
  outline: none;
  border-color: var(--color-teal);
}

.simple-tree-builder .clear-button {
  align-self: flex-end;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-mono);
  font-size: var(--font-size-small);
  background-color: white;
  border: 1px solid var(--color-line);
  color: var(--color-text-dark);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.simple-tree-builder .clear-button:hover:not(:disabled) {
  background-color: var(--color-beige-base);
  border-color: var(--color-text-dark);
}

/* Parse status - editorial style */
.simple-tree-builder .parse-status {
  padding: var(--spacing-md);
  border: 1px solid var(--color-line);
  font-size: var(--font-size-small);
  line-height: 1.5;
  background: transparent;
}

.simple-tree-builder .parse-status.info {
  background-color: var(--color-beige-light);
  color: var(--color-text-muted);
}

.simple-tree-builder .parse-status.success {
  background-color: #d4edda;
  border-color: var(--color-green-accent);
  color: #155724;
}

.simple-tree-builder .parse-status.error {
  background-color: #f8d7da;
  border-color: var(--color-red-accent);
  color: #721c24;
}

/* Example cards - editorial style */
.simple-tree-builder .example-card {
  padding: var(--spacing-md);
  border: 1px solid var(--color-line);
  background-color: white;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.simple-tree-builder .example-card:hover {
  border-color: var(--color-teal);
  background-color: var(--color-beige-light);
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.simple-tree-builder .example-card.selected {
  border-color: var(--color-teal);
  border-width: 2px;
  background-color: var(--color-beige-light);
}

.simple-tree-builder .example-name {
  font-weight: 600;
  font-size: var(--font-size-body);
  color: var(--color-text-dark);
}

.simple-tree-builder .example-description {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  line-height: 1.4;
}

.simple-tree-builder .example-code {
  font-family: var(--font-mono);
  font-size: var(--font-size-tiny);
  background-color: var(--color-beige-light);
  padding: var(--spacing-sm);
  border: 1px solid var(--color-line);
  border-radius: 2px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  display: block;
  color: var(--color-text-dark);
}

/* Types grid - editorial style */
.simple-tree-builder .types-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.simple-tree-builder .type-card {
  padding: var(--spacing-md);
  border: 1px solid var(--color-line);
  background-color: white;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  overflow: visible;
}

.simple-tree-builder .type-card:hover {
  border-color: var(--color-teal);
  background-color: var(--color-beige-light);
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.simple-tree-builder .type-card.selected {
  border-color: var(--color-teal);
  border-width: 2px;
  background-color: var(--color-beige-light);
}

.simple-tree-builder .type-name {
  font-weight: 700;
  font-size: var(--font-size-body);
  color: var(--color-text-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0;
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--color-line);
  background: transparent;
}

.simple-tree-builder .type-fields {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: 0;
  background: transparent;
}

.simple-tree-builder .type-field {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  line-height: 1.4;
}

.simple-tree-builder .field-name {
  color: var(--color-teal);
  font-weight: 600;
}

.simple-tree-builder .field-type {
  color: var(--color-text-muted);
}

/* Tree visualization - editorial style */
.simple-tree-builder .tree-visualization {
  flex: 1;
  padding: var(--spacing-md);
  border: 1px solid var(--color-line);
  background-color: white;
  overflow: auto;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- Chart Builder Editorial Theme --- */
.chart-builder-page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: #f5f1e8;
}

.chart-builder-page .chart-builder-content {
  flex: 1;
  padding: 2rem;
  max-width: 1800px;
  margin: 0 auto;
  width: 100%;
  display: block;
}

.chart-builder-page .builder-header {
  margin-bottom: 2rem;
}

.chart-builder-page .builder-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 0.5rem;
}

.chart-builder-page .builder-subtitle {
  font-size: 1.1rem;
  color: #666;
  margin-bottom: 1.5rem;
}

.chart-builder-page .chart-type-tabs {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.chart-builder-page .chart-type-tab {
  padding: 0.75rem 1.5rem;
  background: white;
  border: 2px solid #ddd;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  font-weight: 500;
  font-size: 1rem;
  color: #333;
}

.chart-builder-page .chart-type-tab:hover {
  background: #f8f9fa;
  border-color: #bbb;
}

.chart-builder-page .chart-type-tab.active,
.chart-builder-page .chart-type-tab--active {
  background: #3b82f6;
  color: white;
  border-color: #3b82f6;
}

.chart-builder-page .builder-panels {
  display: grid;
  grid-template-columns: 320px 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.chart-builder-page .builder-panel,
.chart-builder-page .recipe-panel,
.chart-builder-page .editor-panel,
.chart-builder-page .preview-panel {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  border: none;
}

.chart-builder-page .panel-title,
.chart-builder-page .builder-panel__title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1a1a1a;
  margin: 0 0 1rem 0;
}

.chart-builder-page #chart-preview,
.chart-builder-page #ast-tree-preview,
.chart-builder-page .chart-preview,
.chart-builder-page .ast-preview {
  min-height: 300px;
  background: #fafafa;
  border: 1px solid #e5e7eb;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- TreeBuilder3 AST Preset Cards (Editorial Style) --- */
.tree-builder3-showcase {
  --color-beige-base: #D4C9A8;
  --color-beige-light: #E8E0CC;
  --color-beige-card: #F5F2E8;
  --color-line: #999999;
  --color-text-dark: #333333;
  --color-text-muted: #666666;
  --color-teal: #5A8A8A;
  --font-mono: 'Courier New', 'Courier', Monaco, monospace;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --transition-fast: 150ms ease-in-out;
}

.tree-builder3-ast-panel {
  background: rgba(245, 242, 232, 0.95);
  border: 1px solid var(--color-line, #999);
  border-radius: 4px;
  padding: var(--spacing-sm, 0.5rem);
  backdrop-filter: blur(8px);
}

.ast-preset-row {
  display: flex;
  gap: var(--spacing-sm, 0.5rem);
  flex-wrap: wrap;
  justify-content: center;
}

.ast-preset-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm, 0.5rem) var(--spacing-md, 1rem);
  min-width: 80px;
  background-color: var(--color-beige-card, #F5F2E8);
  border: 2px solid var(--color-line, #999);
  cursor: pointer;
  transition: all var(--transition-fast, 150ms ease-in-out);
  font-family: var(--font-mono);
}

.ast-preset-card:hover {
  background-color: var(--color-beige-base, #D4C9A8);
  border-color: var(--color-text-dark, #333);
}

.ast-preset-card--selected {
  background-color: var(--color-teal, #5A8A8A);
  border-color: var(--color-teal, #5A8A8A);
  color: white;
}

.ast-preset-card--selected:hover {
  background-color: #4a7a7a;
  border-color: #4a7a7a;
}

.ast-preset-card__name {
  font-size: 0.875rem;
  font-weight: bold;
  letter-spacing: 0.05em;
}

.ast-preset-card__desc {
  font-size: 0.75rem;
  color: var(--color-text-muted, #666);
  margin-top: 2px;
}

.ast-preset-card--selected .ast-preset-card__desc {
  color: rgba(255, 255, 255, 0.8);
}

/* ==========================================================================
   TreeBuilder3 Redesign - Explanatory Demo Layout
   ========================================================================== */

/* Instruction header strip - 4 columns matching layout below */
.tb3-instruction-header {
  display: grid;
  grid-template-columns: 180px 180px 1fr 180px;
  gap: 0;
  background: var(--color-beige-base, #D4C9A8);
  border-bottom: 2px solid var(--color-line, #999);
  font-family: 'Courier New', Courier, monospace;
}

.tb3-instruction-step {
  padding: 1rem 0.75rem;
  text-align: center;
  border-right: 1px solid var(--color-line, #999);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
}

.tb3-instruction-step:last-child {
  border-right: none;
}

/* Center column header - two-column explanation text */
.tb3-instruction-step--center {
  background: var(--color-beige-light, #E8E0CC);
  padding: 0.5rem 1rem;
}

/* Two-column explanation in header center */
.tb3-header-explanation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--color-text-muted, #666);
}

.tb3-header-explanation p {
  margin: 0;
}

.tb3-header-explanation strong {
  color: var(--color-text-dark, #333);
}

.tb3-header-explanation em {
  font-style: italic;
  color: var(--color-terracotta, #C17B4A);
}

.tb3-instruction-step__row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tb3-step-arrow {
  font-size: 1.25rem;
  color: var(--color-teal, #5A8A8A);
  margin-top: 0.25rem;
}

.tb3-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-teal, #5A8A8A);
  color: white;
  font-weight: bold;
  font-size: 0.875rem;
}

.tb3-step-text {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-dark, #333);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Main 4-column layout */
.tb3-main-layout {
  display: grid;
  grid-template-columns: 180px 180px 1fr 180px;
  gap: 0;
  height: 480px;  /* Fixed height so output section appears above fold */
  background: var(--color-beige-light, #E8E0CC);
}

.tb3-column {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--color-line, #999);
  background: var(--color-beige-card, #F5F2E8);
  overflow-y: auto;
}

.tb3-column:last-child {
  border-right: none;
}

.tb3-column-header {
  padding: 0.75rem;
  background: var(--color-beige-base, #D4C9A8);
  border-bottom: 1px solid var(--color-line, #999);
  font-size: 0.75rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-dark, #333);
  text-align: center;
}

.tb3-column-content {
  flex: 1;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Recipe cards (AST presets) */
.tb3-recipe-card {
  padding: 0.75rem;
  background: white;
  border: 2px solid var(--color-line, #999);
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
}

.tb3-recipe-card:hover {
  border-color: var(--color-teal, #5A8A8A);
  background: var(--color-beige-light, #E8E0CC);
}

.tb3-recipe-card--selected {
  border-color: var(--color-teal, #5A8A8A);
  background: var(--color-teal, #5A8A8A);
  color: white;
}

.tb3-recipe-card__name {
  font-weight: bold;
  font-size: 0.875rem;
}

.tb3-recipe-card__desc {
  font-size: 0.7rem;
  color: var(--color-text-muted, #666);
  margin-top: 0.25rem;
}

.tb3-recipe-card--selected .tb3-recipe-card__desc {
  color: rgba(255, 255, 255, 0.8);
}

/* Type cards - "Array Point", "Set Country" etc. */
.tb3-type-card {
  display: flex;
  flex-direction: column;
  padding: 0.4rem 0.5rem;
  margin-bottom: 0.2rem;
  background: white;
  border: 1px solid var(--color-line, #999);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tb3-type-card:hover:not(.tb3-type-card--disabled) {
  border-color: var(--color-teal, #5A8A8A);
  background: var(--color-beige-light, #E8E0CC);
}

.tb3-type-card--selected {
  border-color: var(--color-teal, #5A8A8A);
  border-width: 2px;
  background: var(--color-beige-light, #E8E0CC);
}

.tb3-type-card--disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* Nested type card (has box-in-box) */
.tb3-type-card--nested {
  padding-bottom: 0.5rem;
}

.tb3-type-card__header {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  margin-bottom: 0.15rem;
}

/* Container type: "Array", "Set", "List", "Tree" */
.tb3-type-card__container {
  font-size: 0.65rem;
  color: var(--color-text-muted, #666);
  font-style: italic;
}

/* Element type: "Point", "Node", "Row" */
.tb3-type-card__element {
  font-weight: bold;
  font-size: 0.75rem;
  color: var(--color-text, #333);
}

.tb3-type-card__fields {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.4rem;
  font-size: 0.55rem;
  color: var(--color-text-muted, #666);
  line-height: 1.2;
}

.tb3-type-card__field-name {
  color: var(--color-teal, #5A8A8A);
}

.tb3-type-card__field {
  font-size: 0.55rem;
  color: var(--color-text-muted, #666);
  white-space: nowrap;
}

/* Nested child card (box-in-box containment) */
.tb3-type-card__nested {
  margin-top: 0.4rem;
  margin-left: 0.5rem;
  padding: 0.35rem 0.4rem;
  background: rgba(255, 255, 255, 0.8);
  border: 1px dashed var(--color-terracotta, #C17B4A);
  border-radius: 3px;
  cursor: pointer;
}

.tb3-type-card__nested:hover {
  background: var(--color-beige-light, #E8E0CC);
  border-style: solid;
}

.tb3-type-card__nested--selected {
  border-color: var(--color-terracotta, #C17B4A);
  border-width: 2px;
  border-style: solid;
  background: #FFF5EE;
}

.tb3-type-card__nested .tb3-type-card__header {
  margin-bottom: 0.1rem;
}

.tb3-type-card__nested .tb3-type-card__element {
  font-size: 0.7rem;
  color: var(--color-terracotta, #C17B4A);
}

/* Dataset cards */
.tb3-dataset-card {
  padding: 0.5rem;
  background: white;
  border: 1px solid var(--color-line, #999);
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tb3-dataset-card:hover:not(.tb3-dataset-card--disabled) {
  border-color: var(--color-teal, #5A8A8A);
  background: var(--color-beige-light, #E8E0CC);
}

.tb3-dataset-card--selected {
  border-color: var(--color-teal, #5A8A8A);
  border-width: 2px;
  background: var(--color-beige-light, #E8E0CC);
}

.tb3-dataset-card--disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.tb3-dataset-card__icon {
  font-size: 1.25rem;
}

.tb3-dataset-card__text {
  flex: 1;
}

.tb3-dataset-card__name {
  font-weight: bold;
  font-size: 0.75rem;
}

.tb3-dataset-card__desc {
  font-size: 0.65rem;
  color: var(--color-text-muted, #666);
}

/* Center column - AST visualization */
.tb3-ast-column {
  background: var(--color-beige-light, #E8E0CC);
  display: flex;
  flex-direction: column;
  position: relative;
  border-right: none;
}

/* Explanation text at top of AST column */
.tb3-ast-explanation {
  position: absolute;
  top: 0.5rem;
  left: 50%;
  transform: translateX(-50%);
  max-width: 90%;
  z-index: 2;
  text-align: center;
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--color-text-muted, #555);
  pointer-events: none;
}

.tb3-ast-explanation p {
  margin: 0 0 0.25rem 0;
}

.tb3-ast-explanation strong {
  color: var(--color-text, #333);
}

.tb3-ast-explanation__note {
  font-size: 0.65rem;
  font-style: italic;
  color: var(--color-terracotta, #C17B4A);
}

.tb3-ast-viz {
  flex: 1;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  overflow: hidden;
}

.tb3-ast-viz-container {
  flex: 1;
  min-height: 400px;
  position: relative;
}

/* AST code as watermark - positioned on left side, below SVG type card */
.tb3-ast-code {
  position: absolute;
  top: 12rem;  /* Start well below the SVG type card area */
  left: 0;
  max-width: 35%;  /* Constrain to left third of the column */
  z-index: 0;
  padding: 0.5rem;
  color: rgba(60, 60, 60, 0.45);
  font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', Consolas, monospace;
  font-size: 0.8rem;
  line-height: 1.4;
  white-space: pre;
  text-align: left;
  pointer-events: none;
  user-select: none;
}

.tb3-ast-code pre,
.tb3-ast-code code {
  background: transparent;
  color: inherit;
  font-size: inherit;
  font-family: inherit;
}

/* Bezier arrow connectors */
.tb3-connector-left,
.tb3-connector-right {
  position: absolute;
  top: 50%;
  width: 60px;
  height: 100px;
  pointer-events: none;
}

.tb3-connector-left {
  left: -60px;
}

.tb3-connector-right {
  right: -60px;
}

/* Output section (always visible) */
.tb3-output-section {
  border-top: 2px solid var(--color-line, #999);
  background: white;
}

.tb3-output-header {
  padding: 0.75rem 1.5rem;
  background: var(--color-beige-base, #D4C9A8);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: bold;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tb3-output-hint {
  font-weight: normal;
  font-size: 0.8rem;
  text-transform: none;
  letter-spacing: normal;
  color: var(--color-text-muted, #666);
}

.tb3-output-viz {
  padding: 1rem 2rem;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-beige-light, #E8E0CC);
}

.tb3-output-viz svg {
  max-width: 100%;
  max-height: 400px;
  background: white;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Responsive: tablet */
@media (max-width: 1200px) {
  .tb3-instruction-header,
  .tb3-main-layout {
    grid-template-columns: 160px 160px 1fr 160px;
  }
}

@media (max-width: 1000px) {
  .tb3-instruction-header,
  .tb3-main-layout {
    grid-template-columns: 140px 140px 1fr 140px;
  }

  .tb3-type-card__fields {
    display: none;
  }

  .tb3-step-text {
    font-size: 0.7rem;
  }
}

/* ==========================================================================
   Simpson's Paradox Visualization Styles
   ========================================================================== */

/* Main Container */
.simpsons-paradox {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem;
  font-family: var(--font-sans);
  color: #2C3E50;
  background-color: #ffffff;
}

/* Header */
.simpsons-header {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid #ecf0f1;
}

.simpsons-header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: #2C3E50;
}

.simpsons-header p {
  font-size: 1.1rem;
  color: #7f8c8d;
  margin: 0;
}

/* Donut Charts Section */
.simpsons-donuts {
  margin-bottom: 2rem;
  text-align: center;
}

.simpsons-donuts h2 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.simpsons-donuts p {
  margin-bottom: 1rem;
}

.simpsons-donuts-container {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 1.5rem 0;
}

.donut-chart {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.simpsons-paradox-note {
  font-size: 1rem;
  color: #2C3E50;
  max-width: 600px;
  margin: 1rem auto;
  line-height: 1.6;
}

/* Scatter Chart Section */
.simpsons-scatter {
  margin-bottom: 2rem;
  text-align: center;
}

.simpsons-scatter h2 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.scatter-chart {
  display: flex;
  justify-content: center;
  margin: 1rem 0;
}

/* Interactive Section (Sliders + Line Chart) */
.simpsons-interactive {
  margin-bottom: 2rem;
  text-align: center;
}

.simpsons-interactive h2 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.simpsons-sliders {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 1.5rem 0;
  flex-wrap: wrap;
}

.simpsons-slider {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.simpsons-slider label {
  font-weight: 600;
  font-size: 0.9rem;
}

.simpsons-slider input[type="range"] {
  width: 200px;
  height: 8px;
  cursor: pointer;
}

.simpsons-slider span {
  font-size: 0.85rem;
  color: #7f8c8d;
  min-width: 40px;
  text-align: center;
}

.line-chart {
  display: flex;
  justify-content: center;
  margin: 1rem 0;
}

.simpsons-paradox-indicator {
  padding: 1rem;
  border-radius: 8px;
  margin: 1rem auto;
  max-width: 600px;
  font-size: 0.95rem;
  text-align: center;
}

.simpsons-paradox-indicator.is-paradox {
  background-color: #fdf2f2;
  border: 1px solid #E74C3C;
  color: #E74C3C;
}

.simpsons-paradox-indicator.no-paradox {
  background-color: #f0fdf4;
  border: 1px solid #1abc9c;
  color: #1abc9c;
}

/* Data Table Section */
.simpsons-table {
  margin-bottom: 2rem;
}

.simpsons-table h2 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

.simpsons-table-description {
  font-size: 0.95rem;
  color: #5a5a5a;
  max-width: 700px;
  margin: 0 auto 1.5rem;
  text-align: center;
  line-height: 1.5;
}

.simpsons-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 0 auto;
  background-color: #ffffff;
}

.simpsons-data-table thead {
  background-color: #f8f9fa;
}

.simpsons-data-table th {
  padding: 0.75rem 0.5rem;
  text-align: center;
  font-weight: 600;
  border-bottom: 2px solid #dee2e6;
  color: #2C3E50;
}

.simpsons-data-table .simpsons-subheader th {
  padding: 0.5rem;
  font-weight: 500;
  font-size: 0.85rem;
  border-bottom: 1px solid #dee2e6;
}

.simpsons-data-table td {
  padding: 0.5rem;
  text-align: center;
  vertical-align: middle;
  border-bottom: 1px solid #ecf0f1;
}

.simpsons-data-table tbody tr:last-child td {
  border-bottom: 2px solid #dee2e6;
  font-weight: 600;
}

.simpsons-dept-name {
  font-weight: 500;
  text-align: left !important;
  padding-left: 1rem !important;
  white-space: nowrap;
}

/* Data cells with number + bar chart */
.simpsons-data-cell {
  min-width: 80px;
}

.simpsons-data-cell span {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 4px;
  color: #2C3E50;
}

.bar-container {
  display: flex;
  justify-content: center;
}

.bar-container svg {
  display: block;
}

/* Donut cells with mini donut charts */
.simpsons-donut-cell {
  min-width: 90px;
  padding: 0.25rem !important;
}

.donut-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.donut-container svg {
  display: block;
}

/* Data table cell classes (Components.purs version) */
.simpsons-data-table .dept-cell {
  font-weight: 500;
  text-align: left;
  padding-left: 1rem;
  white-space: nowrap;
}

.simpsons-data-table .bar-cell {
  min-width: 55px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.simpsons-data-table .bar-cell svg {
  display: block;
}

.simpsons-data-table .donut-cell {
  min-width: 85px;
  padding: 0.25rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

.simpsons-data-table .donut-cell svg {
  display: block;
}

.simpsons-data-table .header-group {
  text-align: center;
}

.simpsons-data-table .header-group .subheaders {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 0.25rem;
  font-size: 0.8rem;
  font-weight: 500;
}

.simpsons-data-table .header-group .subheaders .male {
  color: #9B59B6;
}

.simpsons-data-table .header-group .subheaders .female {
  color: #27AE60;
}

/* Paradox result indicator */
.simpsons-paradox-result {
  text-align: center;
  padding: 1rem;
  margin-top: 1rem;
  border-radius: 8px;
  font-size: 1.1rem;
}

.simpsons-paradox-result strong {
  margin-right: 0.5rem;
}

.simpsons-paradox-result.is-paradox {
  background-color: #fdf2f2;
  border: 2px solid #E74C3C;
  color: #E74C3C;
}

.simpsons-paradox-result.is-paradox span {
  font-weight: 700;
  text-transform: uppercase;
}

.simpsons-paradox-result.no-paradox {
  background-color: #f0fdf4;
  border: 2px solid #1abc9c;
  color: #1abc9c;
}

.simpsons-paradox-result.no-paradox span {
  font-weight: 700;
  text-transform: uppercase;
}

/* Force Visualization Section */
.simpsons-force {
  margin-bottom: 2rem;
  text-align: center;
}

.simpsons-force h2 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.force-viz {
  display: flex;
  justify-content: center;
  margin: 1rem 0;
  min-height: 400px;
}

.simpsons-toggle {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: #ffffff;
  background-color: #3498DB;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease;
  margin-bottom: 1rem;
}

.simpsons-toggle:hover {
  background-color: #2980b9;
}

.simpsons-toggle:active {
  background-color: #2471a3;
}

/* Force Viz Section (wrapper with legend + button + viz) */
.force-viz-section {
  text-align: center;
}

.force-viz-legend {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.legend-dot.accepted {
  background-color: #3498DB; /* blue - accepted */
}

.legend-dot.rejected {
  background-color: #E74C3C; /* red - rejected */
}

.force-viz-combined-label {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background: #e3f2fd;
  border: 1px solid #90caf9;
  border-radius: 4px;
  color: #1565c0;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
}

/* Credits Section */
.simpsons-credits {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid #ecf0f1;
  color: #7f8c8d;
  font-size: 0.9rem;
}

.simpsons-credits a {
  color: #3498DB;
  text-decoration: none;
}

.simpsons-credits a:hover {
  text-decoration: underline;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .simpsons-paradox {
    padding: 1rem;
  }

  .simpsons-header h1 {
    font-size: 1.5rem;
  }

  .simpsons-donuts-container {
    flex-direction: column;
    gap: 1.5rem;
  }

  .simpsons-sliders {
    flex-direction: column;
    gap: 1rem;
  }

  .simpsons-slider input[type="range"] {
    width: 180px;
  }

  .simpsons-data-table {
    font-size: 0.8rem;
  }

  .simpsons-data-cell {
    min-width: 60px;
  }

  .simpsons-donut-cell {
    min-width: 70px;
  }

  .bar-container svg {
    transform: scale(0.8);
  }

  .donut-container svg {
    transform: scale(0.85);
  }
}

@media (max-width: 480px) {
  .simpsons-data-table {
    font-size: 0.75rem;
  }

  .simpsons-data-cell span {
    font-size: 0.75rem;
  }

  .simpsons-dept-name {
    font-size: 0.75rem;
  }
}

/* Standalone "Living Poster" wrapper - FULL WIDTH */
.simpsons-standalone {
  min-height: 100vh;
  background-color: #ffffff;
}

/* Acknowledgement banner - thin credit line */
.acknowledgement-banner {
  background: #f8f9fa;
  padding: 0.5rem 1rem;
  text-align: center;
  font-size: 0.85rem;
  color: #666;
  border-bottom: 1px solid #e9ecef;
}

.acknowledgement-banner a {
  color: #3498db;
  text-decoration: none;
}

.acknowledgement-banner a:hover {
  text-decoration: underline;
}

.simpsons-standalone .simpsons-paradox {
  max-width: none;
  padding: 0;
  margin: 0;
  border-radius: 0;
}

/* Hide the inner header when in standalone mode (title is in the wrapper) */
.simpsons-standalone .simpsons-header {
  display: none;
}

/* Paper-style title block */
.simpsons-title-block {
  background: #ffffff;
  text-align: center;
  padding: 1.5rem 2rem 1rem;
  border-bottom: 1px solid #ecf0f1;
}

.simpsons-subtitle {
  font-size: 1.25rem;
  font-style: italic;
  color: #5a6c7d;
  margin: 0 0 0.75rem;
  font-weight: 400;
}

.simpsons-attribution {
  font-size: 0.9rem;
  color: #7f8c8d;
  margin: 0;
}

.simpsons-attribution a {
  color: #3498DB;
  text-decoration: none;
  font-weight: 500;
}

.simpsons-attribution a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Simpson's Paradox - Modern Grid Layout
   ========================================================================== */

/* Hero row: Admissions intro (1/3) + Cohorts hero (2/3) */
.simpsons-hero-row {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
  padding: 2rem 3rem;
  align-items: center;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  min-height: 450px;
}

.simpsons-hero-left,
.simpsons-hero-right {
  min-width: 0; /* Prevent grid blowout */
}

/* Admissions - shadow box intro card (left) */
.simpsons-hero-left {
  background: #ffffff;
  border-radius: 12px;
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.12),
    0 2px 10px rgba(0, 0, 0, 0.08);
  padding: 1.5rem;
  transform: translateY(-4px);
}

.simpsons-hero-left .simpsons-donuts {
  margin-bottom: 0;
}

.simpsons-hero-left .simpsons-donuts h2 {
  font-size: 1.2rem;
}

.simpsons-hero-left .simpsons-donuts-container {
  gap: 1.5rem;
}

/* Cohorts - the hero image (right) */
.simpsons-hero-right .simpsons-force {
  margin-bottom: 0;
}

/* Explore row: Interactive (left) + Illustration table (right) */
.simpsons-explore-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  padding: 2rem;
  background: #fafafa;
  align-items: start;
}

.simpsons-explore-left,
.simpsons-explore-right {
  min-width: 0;
}

.simpsons-explore-left .simpsons-interactive {
  margin-bottom: 0;
}

.simpsons-explore-right .simpsons-table {
  margin-bottom: 0;
}

/* Explain row: Single column for the scatter chart */
.simpsons-explain-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  padding: 2rem;
  align-items: start;
}

.simpsons-explain-left {
  padding-right: 1rem;
}

.simpsons-explain-right {
  padding-left: 1rem;
  border-left: 1px solid #e0e0e0;
}

.simpsons-explain-row .simpsons-scatter {
  margin-bottom: 0;
}

/* Hide credits in standalone mode (attribution is in title block) */
.simpsons-standalone .simpsons-credits {
  display: none;
}

/* Responsive: Stack on smaller screens */
@media (max-width: 1200px) {
  .simpsons-hero-row {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    min-height: auto;
  }

  .simpsons-hero-left {
    transform: none;
    max-width: 500px;
    margin: 0 auto;
    order: 1; /* Keep admissions first when stacked */
  }

  .simpsons-hero-right {
    order: 2;
  }
}

@media (max-width: 1000px) {
  .simpsons-explore-row {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 768px) {
  .simpsons-hero-row,
  .simpsons-explore-row,
  .simpsons-explain-row {
    grid-template-columns: 1fr;
    padding: 1rem;
  }

  .simpsons-explain-left {
    padding-right: 0;
  }

  .simpsons-explain-right {
    padding-left: 0;
    border-left: none;
    border-top: 1px solid #e0e0e0;
    padding-top: 1rem;
  }

  .simpsons-hero-row {
    padding: 1rem;
  }
}

/* ========================== */
/* Proper Pooling Section     */
/* ========================== */

.simpsons-proper-pooling {
  padding: 3rem 4rem;
  background: #ffffff;
}

.simpsons-proper-pooling-content {
  max-width: 800px;
  margin: 0 auto;
}

.simpsons-proper-pooling h2 {
  font-size: 1.8rem;
  color: #2c3e50;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.simpsons-proper-pooling p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #34495e;
  margin-bottom: 1.25rem;
}

.simpsons-proper-pooling blockquote {
  background: #f8f9fa;
  border-left: 4px solid #3498db;
  padding: 1.5rem 2rem;
  margin: 2rem 0;
  border-radius: 0 8px 8px 0;
}

.simpsons-proper-pooling blockquote p {
  font-style: italic;
  color: #2c3e50;
  margin-bottom: 0.75rem;
}

.simpsons-proper-pooling blockquote cite {
  font-size: 0.9rem;
  color: #7f8c8d;
  font-style: normal;
  display: block;
}

/* ========================== */
/* Why It Matters Section     */
/* ========================== */

.simpsons-why-matters {
  padding: 3rem 4rem;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.simpsons-why-matters-content {
  max-width: 800px;
  margin: 0 auto;
}

.simpsons-why-matters h2 {
  font-size: 1.8rem;
  color: #2c3e50;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.simpsons-why-matters p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #34495e;
  margin-bottom: 1.25rem;
}

.simpsons-implications-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.simpsons-implications-list li {
  font-size: 1.1rem;
  line-height: 1.7;
  color: #34495e;
  padding: 0.75rem 0 0.75rem 2rem;
  position: relative;
}

.simpsons-implications-list li::before {
  content: "•";
  position: absolute;
  left: 0.5rem;
  color: #3498db;
  font-size: 1.3rem;
}

.simpsons-implications-list li strong {
  color: #2c3e50;
}

/* ========================== */
/* More Information Section   */
/* ========================== */

.simpsons-more-info {
  padding: 2.5rem 4rem;
  background: #ffffff;
  border-top: 1px solid #ecf0f1;
}

.simpsons-more-info h2 {
  font-size: 1.5rem;
  color: #2c3e50;
  margin-bottom: 1.25rem;
  font-weight: 600;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.simpsons-more-info ul {
  max-width: 800px;
  margin: 0 auto;
  list-style: none;
  padding: 0;
}

.simpsons-more-info li {
  padding: 0.5rem 0;
  font-size: 1.05rem;
}

.simpsons-more-info a {
  color: #3498db;
  text-decoration: none;
}

.simpsons-more-info a:hover {
  text-decoration: underline;
}

/* ========================== */
/* Tagline styling            */
/* ========================== */

.simpsons-tagline {
  font-size: 1.3rem;
  font-style: italic;
  color: #7f8c8d;
  margin-top: 0.5rem;
}

/* Variables list in scatter section */
.simpsons-variables-list {
  margin: 1.5rem 0;
  padding-left: 1.5rem;
}

.simpsons-variables-list li {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #34495e;
  margin-bottom: 0.75rem;
}

.simpsons-scatter-explanation {
  font-size: 1.05rem;
  line-height: 1.7;
  color: #34495e;
  margin-top: 1.5rem;
  padding: 1rem;
  background: #f8f9fa;
  border-radius: 8px;
}

/* Blockquote styling in donut section */
.simpsons-donuts blockquote {
  background: #f8f9fa;
  border-left: 4px solid #e74c3c;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 8px 8px 0;
}

.simpsons-donuts blockquote p {
  font-style: italic;
  color: #2c3e50;
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.simpsons-donuts blockquote cite {
  font-size: 0.85rem;
  color: #7f8c8d;
  font-style: normal;
  display: block;
}

/* Responsive adjustments for new sections */
@media (max-width: 768px) {
  .simpsons-proper-pooling,
  .simpsons-why-matters,
  .simpsons-more-info {
    padding: 2rem 1.5rem;
  }

  .simpsons-proper-pooling h2,
  .simpsons-why-matters h2,
  .simpsons-more-info h2 {
    font-size: 1.5rem;
  }

  .simpsons-proper-pooling p,
  .simpsons-why-matters p {
    font-size: 1rem;
  }
}

/* ========================== */
/* Dataset Selector           */
/* ========================== */

.dataset-selector {
  background: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}

.dataset-selector-label {
  font-weight: 600;
  color: #2c3e50;
  margin-right: 0.75rem;
}

.dataset-selector-dropdown {
  font-size: 1rem;
  padding: 0.5rem 1rem;
  border: 1px solid #ced4da;
  border-radius: 4px;
  background: #fff;
  color: #2c3e50;
  min-width: 280px;
  cursor: pointer;
}

.dataset-selector-dropdown:focus {
  outline: none;
  border-color: #3498db;
  box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.dataset-selector-description {
  margin-top: 1rem;
  font-size: 1rem;
  color: #34495e;
  line-height: 1.6;
}

.dataset-selector-source {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: #7f8c8d;
}

.dataset-selector-source em {
  font-style: normal;
  font-weight: 500;
}

/* ========================== */
/* Postscript Section         */
/* ========================== */

.simpsons-postscript {
  padding: 3rem 4rem;
  background: #fff;
  border-top: 2px solid #e9ecef;
}

.simpsons-postscript hr {
  display: none;
}

.simpsons-postscript h2 {
  font-size: 1.8rem;
  color: #2c3e50;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.simpsons-postscript-intro {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #34495e;
  margin-bottom: 2rem;
  max-width: 900px;
}

.simpsons-postscript-intro a {
  color: #3498db;
  text-decoration: none;
}

.simpsons-postscript-intro a:hover {
  text-decoration: underline;
}

.simpsons-postscript-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.simpsons-postscript-left {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 1.5rem;
}

.simpsons-postscript-right {
  padding: 1rem 0;
}

.simpsons-postscript-right h3 {
  font-size: 1.3rem;
  color: #2c3e50;
  margin-bottom: 1rem;
}

.simpsons-postscript-right p {
  font-size: 1rem;
  line-height: 1.7;
  color: #34495e;
  margin-bottom: 1rem;
}

.simpsons-postscript-right ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
}

.simpsons-postscript-right li {
  padding: 0.5rem 0 0.5rem 1.5rem;
  position: relative;
  font-size: 1rem;
  line-height: 1.6;
  color: #34495e;
}

.simpsons-postscript-right li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: #3498db;
}

.simpsons-postscript-right code {
  background: #e9ecef;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: #c7254e;
}

/* Dataset Table */
.simpsons-dataset-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
  font-size: 0.95rem;
}

.simpsons-dataset-table th,
.simpsons-dataset-table td {
  padding: 0.6rem 0.8rem;
  text-align: center;
  border: 1px solid #dee2e6;
}

.simpsons-dataset-table th {
  background: #e9ecef;
  font-weight: 600;
  color: #2c3e50;
}

.simpsons-dataset-table td:first-child {
  text-align: left;
  font-weight: 500;
}

.simpsons-dataset-table .combined-row {
  background: #f8f9fa;
  border-top: 2px solid #dee2e6;
}

.simpsons-dataset-table td.higher {
  background: #d4edda;
  color: #155724;
  font-weight: 600;
}

.simpsons-dataset-table tfoot td {
  border: none;
  padding-top: 1rem;
}

.paradox-indicator {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  text-align: center;
}

.paradox-indicator.is-paradox {
  background: #fff3cd;
  color: #856404;
  border: 1px solid #ffc107;
}

.paradox-indicator.no-paradox {
  background: #d4edda;
  color: #155724;
  border: 1px solid #28a745;
}

/* ============================================================================
   Dataset Cards Grid - All Simpson's Paradox Examples
   ============================================================================ */

.simpsons-datasets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(550px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.dataset-card {
  background: var(--psd3-bg-card, #fff);
  border: 1px solid #dee2e6;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.2s ease;
}

.dataset-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.dataset-card-header {
  padding: 1rem 1.25rem;
  background: #f8f9fa;
  border-bottom: 1px solid #dee2e6;
}

.dataset-card-header h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--psd3-text-primary, #1a1a1a);
}

.dataset-card-description {
  margin: 0;
  font-size: 0.9rem;
  color: var(--psd3-text-muted, #666);
  line-height: 1.5;
}

.dataset-card-content {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1rem 1.25rem;
  align-items: start;
}

.dataset-card-chart {
  flex-shrink: 0;
}

.dataset-card-chart .paradox-chart {
  display: block;
}

.dataset-card-chart svg {
  display: block;
}

.dataset-card-table {
  overflow-x: auto;
}

.dataset-card-table .simpsons-dataset-table {
  margin-top: 0;
  font-size: 0.85rem;
}

.dataset-card-table .simpsons-dataset-table th,
.dataset-card-table .simpsons-dataset-table td {
  padding: 0.4rem 0.5rem;
}

.dataset-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.25rem;
  background: #f8f9fa;
  border-top: 1px solid #dee2e6;
  gap: 1rem;
}

.dataset-card-footer .paradox-indicator {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.dataset-card-footer cite {
  font-size: 0.8rem;
  color: var(--psd3-text-muted, #666);
  font-style: italic;
  text-align: right;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Responsive */
@media (max-width: 1200px) {
  .simpsons-datasets-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .dataset-card-content {
    grid-template-columns: 1fr;
  }

  .dataset-card-chart {
    justify-self: center;
  }

  .dataset-card-footer {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }

  .dataset-card-footer cite {
    text-align: center;
  }
}

/* Responsive */
@media (max-width: 1000px) {
  .simpsons-postscript-grid {
    grid-template-columns: 1fr;
  }

  .simpsons-postscript {
    padding: 2rem 1.5rem;
  }
}

/* ============================================================================
   Interactive Paradox Cards - Sliders + Charts for each dataset
   ============================================================================ */

.interactive-card {
  background: var(--psd3-bg-card, #fff);
  border: 1px solid #dee2e6;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.2s ease;
}

.interactive-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.interactive-card-header {
  padding: 1rem 1.25rem;
  background: #f8f9fa;
  border-bottom: 1px solid #dee2e6;
}

.interactive-card-header h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--psd3-text-primary, #1a1a1a);
}

.interactive-card-header p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--psd3-text-muted, #666);
  line-height: 1.5;
}

.interactive-card-body {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  padding: 1.25rem;
  align-items: start;
}

.interactive-card-sliders {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

/* Match the main .simpsons-slider style for visual consistency */
.paradox-slider {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.paradox-slider label {
  font-weight: 600;
  font-size: 0.9rem;
}

.paradox-slider input[type="range"] {
  width: 160px;
  height: 8px;
  cursor: pointer;
}

.paradox-slider span {
  font-size: 0.85rem;
  color: #7f8c8d;
  min-width: 40px;
  text-align: center;
}

.interactive-card-chart {
  flex-shrink: 0;
  min-width: 280px;
  min-height: 220px;
}

.interactive-card-chart svg {
  display: block;
  background: #fafafa;
  border: 1px solid #eee;
  border-radius: 4px;
}

.interactive-card-controls {
  margin-top: 1rem;
}

.reset-button {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  background: #f8f9fa;
  border: 1px solid #dee2e6;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.reset-button:hover {
  background: #e9ecef;
  border-color: #ced4da;
}

.reset-button:active {
  background: #dee2e6;
}

.interactive-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.25rem;
  background: #f8f9fa;
  border-top: 1px solid #dee2e6;
  gap: 1rem;
}

.interactive-card-footer .paradox-indicator {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 4px;
  flex-shrink: 0;
}

.interactive-card-footer .paradox-indicator.is-paradox {
  background: #fff3cd;
  color: #856404;
  border: 1px solid #ffc107;
}

.interactive-card-footer .paradox-indicator.no-paradox {
  background: #d4edda;
  color: #155724;
  border: 1px solid #28a745;
}

.interactive-card-footer cite {
  font-size: 0.8rem;
  color: var(--psd3-text-muted, #666);
  font-style: italic;
  text-align: right;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Responsive */
@media (max-width: 700px) {
  .interactive-card-body {
    grid-template-columns: 1fr;
  }

  .interactive-card-chart {
    justify-self: center;
    order: -1;
  }

  .interactive-card-footer {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }

  .interactive-card-footer cite {
    text-align: center;
  }
}

/* ============================================================================
   Simpson's Paradox - A-J Page Grid Layout
   ============================================================================ */

.page-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-areas:
    "A B"
    "C D"
    "E E"
    "H I"
    "J J";
  gap: 2rem;
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.page-section {
  background: #fff;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.section-A { grid-area: A; }
.section-B { grid-area: B; }
.section-C { grid-area: C; }
.section-D { grid-area: D; }
.section-E { grid-area: E; }
.section-F { grid-area: F; }
.section-G { grid-area: G; }
.section-H { grid-area: H; }
.section-I { grid-area: I; }
.section-J { grid-area: J; }

/* Section A - Text intro with blockquote styling */
.section-A p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: #34495e;
  margin-bottom: 1rem;
}

.section-A blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  background: #f8f9fa;
  border-left: 4px solid #3498db;
  border-radius: 4px;
}

.section-A blockquote p {
  font-style: italic;
  margin-bottom: 0.5rem;
}

.section-A blockquote ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.section-A blockquote li {
  font-size: 0.9rem;
  color: #666;
}

.section-A h3 {
  font-size: 1.2rem;
  color: #2c3e50;
  margin: 1.5rem 0 1rem;
}

.section-A ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.section-A li {
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

/* Section B - Visualizations */
.section-B {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Section C - Proper Pooling */
.section-C h2 {
  font-size: 1.4rem;
  color: #2c3e50;
  margin-bottom: 1rem;
}

.section-C p {
  font-size: 1rem;
  line-height: 1.7;
  color: #34495e;
  margin-bottom: 1rem;
}

.section-C blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  background: #f8f9fa;
  border-left: 4px solid #3498db;
  border-radius: 4px;
}

/* Section D - Force viz departments */
.section-D h2 {
  font-size: 1.4rem;
  color: #2c3e50;
  margin-bottom: 1rem;
  text-align: center;
}

/* Section E - Full width illustration */
.section-E h2 {
  font-size: 1.4rem;
  color: #2c3e50;
  margin-bottom: 1rem;
}

.section-E p {
  font-size: 1rem;
  line-height: 1.7;
  color: #34495e;
}

/* Illustration Component - Following InteractiveParadoxCard pattern */
.section-illustration {
  min-height: 300px;
}

.illustration-section {
  margin-top: 1rem;
}

/* Top row: sliders left, chart right */
.illustration-body {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

/* Sliders column (left) */
.illustration-sliders {
  flex: 0 0 180px;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Reuse the paradox-slider styles from InteractiveParadoxCard */
.illustration-sliders .paradox-slider {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.illustration-sliders .paradox-slider label {
  font-size: 0.85rem;
  font-weight: 500;
}

.illustration-sliders .paradox-slider input[type="range"] {
  width: 100%;
  cursor: pointer;
}

.illustration-sliders .paradox-slider span {
  font-size: 0.8rem;
  color: #666;
  text-align: right;
}

/* Controls and paradox indicator */
.illustration-controls {
  margin-top: 0.5rem;
}

.illustration-controls .reset-button {
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  background: #f0f0f0;
  border: 1px solid #ddd;
  border-radius: 4px;
  cursor: pointer;
}

.illustration-controls .reset-button:hover {
  background: #e0e0e0;
}

/* Small paradox indicator */
.paradox-indicator-small {
  margin-top: 0.75rem;
  padding: 0.5rem;
  border-radius: 4px;
  font-size: 0.85rem;
  text-align: center;
}

.paradox-indicator-small.is-paradox {
  background: #fdf2f2;
  border: 1px solid #E74C3C;
  color: #c0392b;
}

.paradox-indicator-small.no-paradox {
  background: #f0fdf4;
  border: 1px solid #27AE60;
  color: #1E8449;
}

/* Chart column (right) */
.illustration-chart {
  flex: 1;
}

.illustration-line-chart-svg {
  display: block;
  max-width: 100%;
}

/* Table container below */
.illustration-table-container {
  margin-top: 1rem;
}

@media (max-width: 600px) {
  .illustration-body {
    flex-direction: column;
  }

  .illustration-sliders {
    flex: none;
    width: 100%;
  }

  .illustration-chart {
    width: 100%;
  }
}

/* Section H - What Simpson's paradox is NOT */
.section-H h2 {
  font-size: 1.4rem;
  color: #2c3e50;
  margin-bottom: 1rem;
}

.section-H h3 {
  font-size: 1.2rem;
  color: #2c3e50;
  margin: 1.5rem 0 1rem;
}

.section-H p {
  font-size: 1rem;
  line-height: 1.7;
  color: #34495e;
  margin-bottom: 1rem;
}

.section-H a {
  color: #3498db;
  text-decoration: none;
}

.section-H a:hover {
  text-decoration: underline;
}

.section-H code {
  background: #f8f9fa;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: #c7254e;
}

/* Section I - More Information */
.section-I h2 {
  font-size: 1.4rem;
  color: #2c3e50;
  margin-bottom: 1rem;
}

.section-I h3 {
  font-size: 1.2rem;
  color: #2c3e50;
  margin: 1.5rem 0 1rem;
}

.section-I ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin: 1rem 0;
}

.section-I li {
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.section-I a {
  color: #3498db;
  text-decoration: none;
}

.section-I a:hover {
  text-decoration: underline;
}

.section-I p {
  font-size: 1rem;
  line-height: 1.7;
  color: #34495e;
  margin-bottom: 1rem;
}

/* Section J - Full width postscript */
.section-J h2 {
  font-size: 1.4rem;
  color: #2c3e50;
  margin-bottom: 1rem;
}

.section-J p {
  font-size: 1rem;
  line-height: 1.7;
  color: #34495e;
  margin-bottom: 1rem;
}

/* Responsive: Stack on mobile */
@media (max-width: 900px) {
  .page-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "A"
      "B"
      "C"
      "D"
      "E"
      "H"
      "I"
      "J";
  }
}

/* ==========================================================================
   Coordinated Interaction CSS Classes
   ========================================================================== */

/* Primary: the element directly being interacted with */
.coord-primary {
  fill-opacity: 1 !important;
  stroke: #333;
  stroke-width: 1.5;
}

/* Related: elements related to the primary */
.coord-related {
  fill-opacity: 0.9 !important;
}

/* Selected: elements inside brush or explicitly selected */
.coord-selected {
  fill-opacity: 1 !important;
  stroke: #333;
  stroke-width: 1;
}

/* Dimmed: elements outside brush or unrelated */
.coord-dimmed {
  fill-opacity: 0.15 !important;
}

/* Brush selection overlay style */
.brush-selection {
  pointer-events: none;
}

/* ==========================================================================
   SPLOM (Scatter Plot Matrix) Styles
   ========================================================================== */

.splom-page {
  min-height: 100vh;
  background: var(--psd3-bg, #f5f5f5);
}

.splom-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-6, 1.5rem);
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-6, 1.5rem);
}

.splom-panel {
  background: white;
  border-radius: var(--radius-lg, 8px);
  padding: var(--space-6, 1.5rem);
  box-shadow: var(--shadow-sm, 0 1px 3px rgba(0,0,0,0.1));
}

.splom-panel h2 {
  margin: 0 0 var(--space-4, 1rem) 0;
  font-size: var(--text-xl, 1.25rem);
  color: var(--psd3-text-primary, #333);
}

.splom-description {
  font-size: var(--text-sm, 0.875rem);
  color: var(--psd3-text-muted, #666);
  line-height: 1.6;
  margin-bottom: var(--space-4, 1rem);
}

.splom-stats {
  font-size: var(--text-sm, 0.875rem);
  color: var(--psd3-text-secondary, #555);
  margin-bottom: var(--space-4, 1rem);
}

.splom-legend-info {
  margin-bottom: var(--space-4, 1rem);
}

.splom-legend-info h4,
.splom-instructions h4 {
  font-size: var(--text-sm, 0.875rem);
  font-weight: 600;
  margin: 0 0 var(--space-2, 0.5rem) 0;
  color: var(--psd3-text-primary, #333);
}

.splom-legend-info ul,
.splom-instructions ul {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: var(--text-sm, 0.875rem);
}

.splom-legend-info li,
.splom-instructions li {
  margin-bottom: var(--space-1, 0.25rem);
  color: var(--psd3-text-secondary, #555);
}

.splom-instructions {
  margin-bottom: var(--space-4, 1rem);
}

.splom-credits {
  font-size: var(--text-xs, 0.75rem);
  color: var(--psd3-text-muted, #666);
  border-top: 1px solid var(--psd3-border, #eee);
  padding-top: var(--space-4, 1rem);
  margin-top: var(--space-4, 1rem);
}

.splom-credits p {
  margin: 0;
  line-height: 1.5;
}

.splom-viz {
  background: white;
  border-radius: var(--radius-lg, 8px);
  padding: var(--space-4, 1rem);
  box-shadow: var(--shadow-sm, 0 1px 3px rgba(0,0,0,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 600px;
}

.splom-loading {
  color: var(--psd3-text-muted, #666);
  font-style: italic;
}

.splom-error {
  color: #c0392b;
  padding: var(--space-4, 1rem);
  background: #fdecea;
  border-radius: var(--radius, 4px);
}

.splom-svg-container {
  width: 100%;
  display: flex;
  justify-content: center;
}

/* SPLOM specific point styling */
.splom-svg .point {
  cursor: default;
  transition: fill-opacity 0.15s ease;
}

/* Mobile: stack layout */
@media (max-width: 900px) {
  .splom-layout {
    grid-template-columns: 1fr;
  }

  .splom-viz {
    min-height: 400px;
    overflow-x: auto;
  }
}