/* ============================================
   Architecting Tomorrow - Unified Stylesheet
   https://www.turbo-ea.org/blog
   ============================================ */

/* ============================================
   1. CSS VARIABLES
   ============================================ */
:root {
  /* Deep blue palette */
  --color-primary: #0a1628;
  --color-secondary: #1e3a8a;
  --color-accent: #1d4ed8;
  --color-highlight: #3b82f6;
  --color-sky: #0284c7;
  --color-cyan: #0891b2;
  --color-light-blue: #dbeafe;
  --color-pale-blue: #eff6ff;
  
  /* Magenta accent (for featured badges and hero elements) */
  --color-magenta: #D63384;
  --color-magenta-light: #f472b6;
  
  /* Neutrals */
  --color-white: #FFFFFF;
  --color-light: #f8fafc;
  --color-border: #e2e8f0;
  --color-muted: #64748b;
  --color-text: #334155;
  --color-dark: #0f172a;
  
  /* Extended palette (shared with marketing site) */
  --color-purple: #8b5cf6;
  --color-teal: #06b6a4;

  /* Status */
  --color-success: #10b981;
  --color-warning: #D63384;

  /* Gradients (shared with marketing site) */
  --gradient-primary: linear-gradient(135deg, #0d93d9, #8b5cf6);
  --gradient-hero: linear-gradient(135deg, #0d93d9 0%, #8b5cf6 50%, #e04e8a 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing (8px grid) */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;

  /* Border radius (aligned with marketing site) */
  --radius-sm: 8px;
  --radius-md: 12px;

  /* Transitions (shared with marketing site) */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
}

/* ============================================
   2. RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-light);
  min-height: 100vh;
}

/* ============================================
   3. LANDING PAGE NAVIGATION (.nav)
   ============================================ */
.nav {
  background: #0a0a0f;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

/* Landing page: frosted nav floating over hero */
.nav.nav-transparent {
  position: fixed;
  left: 0;
  right: 0;
  background: rgba(10, 10, 15, 0.2);
  backdrop-filter: blur(1px);
  -webkit-backdrop-filter: blur(1px);
  border-bottom-color: rgba(255, 255, 255, 0.04);
  transition: background 0.8s ease, border-bottom-color 0.8s ease;
}

.nav.nav-transparent.scrolled {
  background: #0a0a0f;
  border-bottom-color: rgba(255, 255, 255, 0.06);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-brand:hover .nav-brand-text {
  color: #f0f0f5;
}

.nav-brand-logo {
  height: 32px;
  width: auto;
}

.nav-brand-sep {
  color: rgba(255, 255, 255, 0.2);
  font-weight: 300;
  font-size: 18px;
}

.nav-brand-text {
  font-size: 16px;
  font-weight: 700;
  color: #9a9ab0;
  transition: color 0.15s ease;
}

.nav-links {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.nav-links a {
  color: #9a9ab0;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s ease;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(135deg, #0d93d9, #8b5cf6);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.nav-links a:hover {
  color: #f0f0f5;
}

.nav-links a:hover::after {
  transform: scaleX(1);
}


/* ============================================
   4. ARTICLE NAVIGATION (.site-nav)
   ============================================ */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #0a0a0f;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.site-nav-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  color: #9a9ab0;
  transition: color 0.15s ease;
}

.site-nav-brand:hover {
  color: #f0f0f5;
}

.site-nav-logo {
  height: 26px;
  width: auto;
}

.site-nav-sep {
  color: rgba(255, 255, 255, 0.2);
  font-weight: 300;
  font-size: 16px;
}

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

.site-nav-links a {
  color: #9a9ab0;
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: color 0.15s ease;
  position: relative;
}

.site-nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(135deg, #0d93d9, #8b5cf6);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.site-nav-links a:hover {
  color: #f0f0f5;
}

.site-nav-links a:hover::after {
  transform: scaleX(1);
}

/* Hamburger toggle — hidden on desktop */
.site-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 101;
}

.site-nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #9a9ab0;
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.site-nav-toggle:hover span {
  background: #f0f0f5;
}

.site-nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.site-nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.site-nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   5. LANDING PAGE HERO WITH TESSELLATION
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  color: var(--color-white);
  padding: 120px var(--space-md) var(--space-2xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-tessellation {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-tessellation svg {
  width: 100%;
  height: 100%;
}

.hero-tessellation polygon {
  transition: fill 0.15s ease;
  cursor: pointer;
  pointer-events: auto;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  pointer-events: none;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  line-height: 1.1;
}

.hero-tagline {
  font-size: 20px;
  opacity: 0.9;
  margin-bottom: var(--space-md);
  font-weight: 400;
}

.hero-description {
  font-size: 16px;
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Hero badge - uses magenta */
.hero-badge {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(214, 51, 132, 0.15);
  border: 1px solid rgba(214, 51, 132, 0.3);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  pointer-events: auto;
}

.hero-badge span {
  color: var(--color-magenta-light);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
}

/* ============================================
   6. MAIN CONTENT AREA
   ============================================ */
.main {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
}

/* ============================================
   7. SECTION HEADERS
   ============================================ */
.section-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.section-header h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
}

.section-header::before {
  content: "";
  width: 4px;
  height: 28px;
  background: var(--color-accent);
  border-radius: 2px;
}

/* ============================================
   8. ARTICLE CARDS (Landing Page)
   ============================================ */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-md);
}

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

.article-card:hover {
  box-shadow: 0 8px 30px rgba(13, 147, 217, 0.15), 0 4px 12px rgba(15, 23, 42, 0.08);
  transform: translateY(-2px);
}

.article-card-header {
  background: var(--color-secondary);
  padding: var(--space-md);
  color: var(--color-white);
}

.article-card-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  background: rgba(255, 255, 255, 0.2);
  padding: 4px 10px;
  border-radius: 2px;
}

.article-card-header h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
}

.article-card-header h3 a {
  color: var(--color-white);
  text-decoration: none;
}

.article-card-header h3 a:hover {
  text-decoration: underline;
}

.article-card-body {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card-excerpt {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
  flex: 1;
  margin-bottom: var(--space-sm);
}

.article-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-muted);
}

.article-card-date {
  font-weight: 500;
}

.article-card-reading {
  display: flex;
  align-items: center;
  gap: 4px;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  margin-top: var(--space-sm);
  transition: color 0.2s;
}

.read-more:hover {
  color: var(--color-magenta);
  text-decoration: none;
}

.read-more svg,
.read-more .material-symbols-outlined {
  width: 16px;
  height: 16px;
  font-size: 16px;
  transition: transform 0.2s;
}

.read-more:hover svg,
.read-more:hover .material-symbols-outlined {
  transform: translateX(3px);
}

/* ============================================
   9. ABOUT SECTION (Landing Page)
   ============================================ */
.about-section {
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.about-content {
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.about-photo {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 3px solid var(--color-light-blue);
}

.about-text p {
  margin-bottom: var(--space-sm);
  font-size: 15px;
}

.about-focus {
  background: var(--color-pale-blue);
  padding: var(--space-md);
  border-radius: var(--radius-sm);
}

.about-focus h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-secondary);
  margin-bottom: var(--space-sm);
}

.focus-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.focus-tag {
  background: var(--color-white);
  border: 1px solid var(--color-light-blue);
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-secondary);
  border-radius: 2px;
}

.connect-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-md);
  padding: 10px 20px;
  background: var(--color-accent);
  color: var(--color-white);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.connect-link:hover {
  background: var(--color-secondary);
}

.connect-link svg {
  width: 18px;
  height: 18px;
}

/* ============================================
   10. LANDING PAGE FOOTER (.footer)
   ============================================ */
.footer {
  background: #0f0f18;
  color: var(--color-white);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 40px var(--space-md);
  margin-top: var(--space-2xl);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand-text {
  font-weight: 800;
  font-size: 1.3rem;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand-sep {
  color: rgba(255, 255, 255, 0.2);
  font-weight: 300;
}

.footer-brand-sub {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  font-weight: 400;
}

.footer-links {
  display: flex;
  gap: var(--space-md);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-copy {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.35);
  margin-top: var(--space-md);
  text-align: center;
  width: 100%;
}

/* ============================================
   11. ARTICLE DOCUMENT CONTAINER
   ============================================ */
.document {
  max-width: 900px;
  margin: 0 auto;
}

@media screen {
  .document {
    background: var(--color-white);
    box-shadow: 0 4px 40px rgba(15, 23, 42, 0.08);
    margin: var(--space-lg) auto;
    border-radius: var(--radius-sm);
    overflow: hidden;
  }
}

/* ============================================
   12. ARTICLE HEADER (.doc-header)
   ============================================ */
.doc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.doc-info {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-accent);
}

.doc-meta {
  text-align: right;
  font-size: 12px;
  color: var(--color-muted);
}

.doc-meta strong {
  color: var(--color-text);
}

/* ============================================
   13. ARTICLE TITLE SECTION
   ============================================ */
.title-section {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--color-secondary);
  color: var(--color-white);
  position: relative;
}

.title-section h1 {
  font-size: 38px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  line-height: 1.2;
}

.title-section .subtitle {
  font-size: 19px;
  font-weight: 400;
  opacity: 0.95;
}

.reading-time {
  display: inline-block;
  margin-top: var(--space-md);
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
}

/* ============================================
   14. ARTICLE SECTIONS
   ============================================ */
.document article {
  padding: var(--space-xl) var(--space-lg);
}

.section {
  margin-bottom: var(--space-xl);
}

.section h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-light-blue);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.section h2::before {
  content: "";
  width: 4px;
  height: 28px;
  background: var(--color-accent);
  border-radius: 2px;
  flex-shrink: 0;
}

.section h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-secondary);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.section p {
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

/* ============================================
   15. KEY TAKEAWAY
   ============================================ */
.key-takeaway {
  background: var(--color-pale-blue);
  border: 1px solid var(--color-light-blue);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin: var(--space-md) 0;
}

.key-takeaway-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-secondary);
  margin-bottom: var(--space-xs);
}

.key-takeaway p {
  margin: 0;
  font-size: 15px;
  color: var(--color-dark);
  font-weight: 500;
}

/* ============================================
   16. INTRO BOX
   ============================================ */
.intro-box {
  background: var(--color-pale-blue);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  border-radius: 0 4px 4px 0;
}

.intro-box p {
  margin: 0;
  font-size: 16px;
  color: var(--color-secondary);
  font-weight: 500;
  line-height: 1.7;
}

/* ============================================
   17. QUOTE BLOCK
   ============================================ */
.quote-block {
  border-left: 4px solid var(--color-accent);
  padding: var(--space-md);
  margin: var(--space-md) 0;
  background: var(--color-pale-blue);
  font-style: italic;
  font-size: 17px;
  color: var(--color-secondary);
}

.quote-block cite {
  display: block;
  font-style: normal;
  font-size: 13px;
  color: var(--color-muted);
  margin-top: var(--space-xs);
}

/* ============================================
   18. HIGHLIGHT BOX
   ============================================ */
.highlight-box {
  background: var(--color-pale-blue);
  border: 1px solid var(--color-light-blue);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin: var(--space-sm) 0;
}

.highlight-box.warning {
  background: #fdf2f8;
  border-color: #fbcfe8;
  border-left: 4px solid var(--color-warning);
}

.highlight-box.success {
  background: #ecfdf5;
  border-color: #a7f3d0;
  border-left: 4px solid var(--color-success);
}

.highlight-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-muted);
  margin-bottom: var(--space-xs);
}

.highlight-box p {
  margin: 0;
}

/* ============================================
   19. LEVEL CARDS
   ============================================ */
.level-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.level-card {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.level-badge {
  width: 54px;
  height: 54px;
  min-width: 54px;
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 700;
  font-size: 22px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.level-content {
  flex: 1;
  min-width: 0;
}

.level-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.level-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin: 0;
}

/* ============================================
   20. BENEFIT BLOCKS
   ============================================ */
.benefit-block {
  background: var(--color-light);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  border: 1px solid var(--color-border);
}

.benefit-block h3 {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: 0;
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.benefit-block h3 .level-badge-small {
  width: 38px;
  height: 38px;
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 700;
  font-size: 15px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.benefit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.benefit-item {
  padding: var(--space-sm);
  background: var(--color-white);
  border-radius: 2px;
  border-left: 3px solid var(--color-accent);
}

.benefit-item.tradeoffs {
  border-left-color: var(--color-warning);
}

.benefit-item.suitable {
  border-left-color: var(--color-success);
}

.benefit-item-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.benefit-item.tradeoffs .benefit-item-label {
  color: var(--color-warning);
}

.benefit-item.suitable .benefit-item-label {
  color: var(--color-success);
}

.benefit-item p {
  font-size: 13px;
  margin: 0;
  line-height: 1.6;
}

/* ============================================
   21. IMPACT CARDS
   ============================================ */
.impact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.impact-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  text-align: center;
  overflow: hidden;
}

.impact-card-header {
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: var(--space-sm);
}

.impact-card-content {
  padding: var(--space-sm);
}

.impact-card h4 {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  margin-top: var(--space-sm);
}

.impact-card p {
  font-size: 13px;
  margin: 0;
  color: var(--color-text);
}

/* ============================================
   22. FACTORS GRID
   ============================================ */
.factors-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.factor-item {
  padding: var(--space-md);
  background: var(--color-pale-blue);
  border-radius: var(--radius-sm);
}

.factor-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-secondary);
  margin-bottom: var(--space-xs);
}

.factor-item p {
  font-size: 13px;
  margin: 0;
  line-height: 1.6;
  color: var(--color-text);
}

/* ============================================
   23. NUMBERED LIST
   ============================================ */
.numbered-list {
  list-style: none;
  counter-reset: item;
  margin: var(--space-sm) 0;
}

.numbered-list li {
  position: relative;
  padding-left: 48px;
  margin-bottom: var(--space-sm);
  font-size: 14px;
}

.numbered-list li::before {
  counter-increment: item;
  content: counter(item);
  position: absolute;
  left: 0;
  top: 2px;
  width: 30px;
  height: 30px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.numbered-list li strong {
  color: var(--color-dark);
}

/* ============================================
   24. TIMELINE BADGE
   ============================================ */
.timeline-badge {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 11px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  margin-left: var(--space-xs);
  vertical-align: middle;
}

/* ============================================
   25. TARGET BOX
   ============================================ */
.target-box {
  padding: var(--space-md);
  background: var(--color-secondary);
  color: var(--color-white);
  margin-top: var(--space-lg);
  border-radius: var(--radius-sm);
}

.target-box h3 {
  color: var(--color-white);
  margin: 0 0 var(--space-xs);
  font-size: 17px;
}

.target-box p {
  color: rgba(255, 255, 255, 0.92);
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

/* ============================================
   26. SECTION DIVIDER
   ============================================ */
.section-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-xl) 0;
}

/* ============================================
   27. ARTICLE FOOTER (.doc-footer)
   ============================================ */
.doc-footer {
  text-align: center;
  padding: var(--space-lg);
  background: var(--color-light);
  color: var(--color-muted);
  font-size: 13px;
}

.doc-footer a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.doc-footer a:hover {
  color: var(--color-magenta);
}

/* ============================================
   28. COMMENTS SECTION
   ============================================ */
.comments-section {
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.comments-section h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.comments-section h2::before {
  content: "";
  width: 4px;
  height: 24px;
  background: var(--color-accent);
  border-radius: 2px;
}

.giscus {
  margin-top: var(--space-md);
}

/* ============================================
   29. RESPONSIVE STYLES
   ============================================ */
@media (max-width: 768px) {
  /* Hide tessellation on mobile */
  .hero-tessellation {
    display: none;
  }

  /* Compact nav brand on mobile */
  .nav-brand-sep,
  .nav-brand-text {
    display: none;
  }

  .site-nav-sep {
    display: none;
  }

  /* Landing page responsive */
  .hero h1 {
    font-size: 32px;
  }

  .hero-tagline {
    font-size: 17px;
  }

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

  .about-content {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .about-photo {
    width: 120px;
    height: 120px;
  }

  .about-text {
    text-align: center;
  }

  .about-focus {
    width: 100%;
  }

  .footer-inner {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .nav-inner {
    flex-direction: column;
    gap: var(--space-sm);
  }

  /* Article responsive */
  .document {
    margin: 0;
    border-radius: 0;
  }

  .title-section h1 {
    font-size: 28px;
  }

  .impact-cards {
    grid-template-columns: 1fr;
  }

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

  .doc-header {
    flex-direction: column;
    gap: var(--space-xs);
    text-align: center;
  }

  .doc-meta {
    text-align: center;
  }
}

/* Article nav hamburger on phones */
@media (max-width: 480px) {
  .site-nav-toggle {
    display: flex;
  }

  .site-nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #0a0a0f;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 100;
  }

  .site-nav-links.open {
    display: flex;
  }

  .site-nav-links a {
    font-size: 1.2rem;
  }

  .site-nav-toggle {
    z-index: 101;
  }
}

/* ============================================
   30. PRINT STYLES
   ============================================ */
@media print {
  /* Hide navigation, footer, comments, and tessellation */
  .nav,
  .footer,
  .site-nav,
  .comments-section,
  .hero-tessellation,
  .hero-badge {
    display: none !important;
  }

  /* Page setup with 80% scaling */
  @page {
    size: A4;
    margin: 9mm 5mm;
  }

  * {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
    color-adjust: exact !important;
  }

  html {
    font-size: 80%;
  }

  body {
    background: white !important;
    font-size: 12px;
    line-height: 1.5;
    color: #334155;
  }

  /* Landing page print */
  .hero {
    background: var(--color-secondary) !important;
    padding: var(--space-lg);
  }

  .article-card {
    page-break-inside: avoid;
  }

  /* Article print */
  .document {
    max-width: none;
    margin: 0;
    padding: 0;
    box-shadow: none !important;
    border-radius: 0;
    overflow: visible;
  }

  .doc-header {
    padding: 8px 16px;
    border-bottom: 1px solid #e2e8f0;
    background: white !important;
  }

  .title-section {
    padding: 32px 24px;
    background: #1e3a8a !important;
    color: white !important;
    border-radius: 0;
  }

  .title-section h1 {
    font-size: 28px;
    margin-bottom: 8px;
  }

  .title-section .subtitle {
    font-size: 16px;
  }

  .reading-time {
    padding: 6px 14px;
    font-size: 11px;
    background: rgba(255, 255, 255, 0.2) !important;
    border: 1px solid rgba(255, 255, 255, 0.3);
  }

  .document article {
    padding: 24px 20px;
  }

  .section {
    margin-bottom: 24px;
    page-break-inside: avoid;
  }

  .section h2 {
    font-size: 18px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    page-break-after: avoid;
  }

  .section h2::before {
    width: 3px;
    height: 22px;
    background: #1d4ed8 !important;
  }

  .section h3 {
    font-size: 14px;
    margin-top: 16px;
    margin-bottom: 8px;
    page-break-after: avoid;
  }

  .section p {
    font-size: 12px;
    margin-bottom: 8px;
    orphans: 3;
    widows: 3;
  }

  .key-takeaway {
    padding: 12px;
    margin: 12px 0;
    background: #eff6ff !important;
    border: 1px solid #dbeafe;
    page-break-inside: avoid;
  }

  .key-takeaway p {
    font-size: 12px;
  }

  .intro-box {
    padding: 12px;
    margin-bottom: 12px;
    background: #eff6ff !important;
    border-left: 3px solid #1d4ed8;
    page-break-inside: avoid;
  }

  .intro-box p {
    font-size: 13px;
  }

  .level-cards {
    gap: 8px;
  }

  .level-card {
    padding: 10px;
    gap: 12px;
    page-break-inside: avoid;
    border: 1px solid #e2e8f0;
  }

  .level-badge {
    width: 40px;
    height: 40px;
    font-size: 18px;
    background: #1d4ed8 !important;
    color: white !important;
  }

  .level-name {
    font-size: 14px;
  }

  .level-desc {
    font-size: 11px;
  }

  .benefit-block {
    padding: 12px;
    margin-bottom: 10px;
    background: #f8fafc !important;
    border: 1px solid #e2e8f0;
    page-break-inside: avoid;
  }

  .benefit-block h3 {
    padding-bottom: 8px;
    margin-bottom: 8px;
  }

  .benefit-block h3 .level-badge-small {
    width: 28px;
    height: 28px;
    font-size: 12px;
    background: #1d4ed8 !important;
    color: white !important;
  }

  .benefit-grid {
    gap: 8px;
  }

  .benefit-item {
    padding: 8px;
    background: white !important;
    border-left: 2px solid #1d4ed8;
  }

  .benefit-item.tradeoffs {
    border-left-color: #D63384;
  }

  .benefit-item.suitable {
    border-left-color: #10b981;
  }

  .benefit-item-label {
    font-size: 9px;
  }

  .benefit-item p {
    font-size: 11px;
  }

  .impact-cards {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 8px;
    margin-top: 12px;
  }

  .impact-card {
    padding: 10px;
    border: 1px solid #e2e8f0;
    page-break-inside: avoid;
  }

  .impact-card-header {
    padding: 5px 10px;
    font-size: 11px;
    background: #1d4ed8 !important;
    color: white !important;
  }

  .impact-card h4 {
    font-size: 9px;
    margin-top: 8px;
  }

  .impact-card p {
    font-size: 11px;
  }

  .factors-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px;
    margin-top: 12px;
  }

  .factor-item {
    padding: 10px;
    background: #eff6ff !important;
    page-break-inside: avoid;
  }

  .factor-item h4 {
    font-size: 12px;
  }

  .factor-item p {
    font-size: 11px;
  }

  .numbered-list {
    margin: 8px 0;
  }

  .numbered-list li {
    padding-left: 36px;
    margin-bottom: 12px;
    font-size: 11px;
    page-break-inside: avoid;
  }

  .numbered-list li::before {
    width: 24px;
    height: 24px;
    font-size: 11px;
    background: #1d4ed8 !important;
    color: white !important;
  }

  .timeline-badge {
    padding: 4px 10px;
    font-size: 9px;
    background: #1d4ed8 !important;
    color: white !important;
  }

  .target-box {
    padding: 12px;
    margin-top: 16px;
    background: #1e3a8a !important;
    color: white !important;
    page-break-inside: avoid;
  }

  .target-box h3 {
    font-size: 14px;
  }

  .target-box p {
    font-size: 11px;
  }

  .section-divider {
    display: none;
  }

  .doc-footer {
    padding: 16px;
    font-size: 11px;
    background: #f8fafc !important;
  }

  .doc-footer a {
    display: none;
  }

  .doc-footer p::after {
    content: "Architecting Tomorrow - https://www.turbo-ea.org/blog";
  }

  /* Force page breaks before major sections */
  #benefits-impacts {
    page-break-before: always;
  }

  #strategic-implications {
    page-break-before: always;
  }

  #implementation {
    page-break-before: always;
  }
}

/* ============================================
   31. SPLIT HERO (Article Header with Image)
   ============================================ */
.split-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 350px;
}

.split-hero-content {
  background: var(--color-secondary);
  color: var(--color-white);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.split-hero-content h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  line-height: 1.2;
}

.split-hero-content .subtitle {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: var(--space-md);
}

.split-hero-content .reading-time {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  font-size: 12px;
  width: fit-content;
}

.split-hero-image {
  background-size: cover;
  background-position: center;
  position: relative;
  min-height: 250px;
}

/* ============================================
   32. SPLIT HERO - RESPONSIVE (Hide image on mobile)
   ============================================ */
@media (max-width: 768px) {
  .split-hero {
    grid-template-columns: 1fr;
  }
  
  .split-hero-image {
    display: none;
  }
  
  .split-hero-content {
    padding: var(--space-lg);
    text-align: center;
  }
  
  .split-hero-content h1 {
    font-size: 28px;
  }
  
  .split-hero-content .reading-time {
    margin: 0 auto;
  }
}

/* ============================================
   33. SPLIT HERO - PRINT (Hide image, full width title)
   ============================================ */
@media print {
  .split-hero {
    display: block !important;
    min-height: auto;
  }
  
  .split-hero-image {
    display: none !important;
  }
  
  .split-hero-content {
    padding: 32px 24px;
    background: #1e3a8a !important;
    color: white !important;
    text-align: center;
  }
  
  .split-hero-content h1 {
    font-size: 28px;
    margin-bottom: 8px;
  }
  
  .split-hero-content .subtitle {
    font-size: 16px;
    margin-bottom: 12px;
  }
  
  .split-hero-content .reading-time {
    padding: 6px 14px;
    font-size: 11px;
    background: rgba(255, 255, 255, 0.2) !important;
  }
}

/* ============================================
   34. SEARCH & FILTER (Landing Page)
   ============================================ */
.search-container {
  margin-bottom: var(--space-md);
}

.search-box {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  max-width: 500px;
}

.search-input-wrapper {
  position: relative;
  flex: 1;
}

.search-input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  font-family: var(--font-primary);
  font-size: 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-magenta);
  box-shadow: 0 0 0 3px rgba(214, 51, 132, 0.1);
}

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

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  font-size: 20px;
  color: var(--color-muted);
  pointer-events: none;
}

.search-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  border: none;
  background: var(--color-border);
  color: var(--color-muted);
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  line-height: 1;
  transition: background 0.2s, color 0.2s;
}

.search-clear:hover {
  background: var(--color-muted);
  color: var(--color-white);
}

.search-clear.visible {
  display: flex;
}

.search-results-info {
  font-size: 14px;
  color: var(--color-muted);
  margin-top: var(--space-sm);
}

.search-results-info strong {
  color: var(--color-text);
}

/* Category filter pills */
.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.filter-pill {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-muted);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-pill:hover {
  border-color: var(--color-magenta);
  color: var(--color-magenta);
}

.filter-pill.active {
  background: var(--color-magenta);
  border-color: var(--color-magenta);
  color: var(--color-white);
}

/* Search match preview in article cards */
.article-card-match {
  font-size: 12px;
  color: var(--color-muted);
  background: var(--color-pale-blue);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  margin-top: var(--space-xs);
  border-left: 3px solid var(--color-magenta);
}

.article-card-match strong {
  color: var(--color-secondary);
  font-weight: 600;
}

/* No results state */
.no-results {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  color: var(--color-muted);
}

.no-results-icon {
  width: 48px;
  height: 48px;
  font-size: 48px;
  display: block;
  margin: 0 auto var(--space-sm);
  color: var(--color-border);
}

.no-results h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.no-results p {
  font-size: 14px;
}

/* Search responsive */
@media (max-width: 768px) {
  .search-box {
    max-width: none;
  }
}

/* ============================================
   35. FEATURED BADGE & SHOW ALL BUTTON
   ============================================ */

/* Tags container for category + featured badge */
.article-card-tags {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: var(--space-sm);
}

/* Featured badge - uses magenta (replaces orange) */
.article-card-featured {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: var(--color-magenta);
  color: var(--color-white);
  padding: 3px 8px;
  border-radius: 2px;
}

/* Optional: subtle highlight for featured cards */
.article-card.is-featured {
  border-color: rgba(214, 51, 132, 0.3);
}

/* Show all container */
.show-all-container {
  text-align: center;
  margin-top: var(--space-lg);
}

/* Show all button */
.show-all-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 12px 24px;
  font-family: var(--font-primary);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-white);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.show-all-btn:hover {
  background: var(--color-magenta);
  border-color: var(--color-magenta);
  color: var(--color-white);
}

.show-all-btn svg,
.show-all-btn .material-symbols-outlined {
  transition: transform 0.2s;
}

.show-all-btn:hover svg,
.show-all-btn:hover .material-symbols-outlined {
  transform: translateY(2px);
}