:root {
  --color-cream-canvas: #f8f7f5;
  --color-pure-paper: #ffffff;
  --color-linen-border: #e3dfd5;
  --color-stone-mist: #d5d2cd;
  --color-warm-ash: #aca89f;
  --color-driftwood: #8f897e;
  --color-bark: #61594a;
  --color-espresso: #261b07;
  --color-amber-signal: #f9a600;
  --color-burnished-gold: #e89b01;
  --color-honey-wash: #f8da9d;
  --color-terracotta: #f0624f;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --shadow-warm-sm: 0 2px 4px rgba(38, 27, 7, 0.04);
  --shadow-warm-md: 0 4px 8px rgba(38, 27, 7, 0.06);
  --shadow-warm-lg: 0 8px 16px rgba(38, 27, 7, 0.08);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --max-width: 1200px;
  --reading-width: 780px;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  background-color: var(--color-cream-canvas);
  color: var(--color-bark);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-espresso);
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease;
}

a:hover {
  color: var(--color-burnished-gold);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Top Announcement Strip */
.top-strip {
  background-color: var(--color-espresso);
  color: #ffffff;
  font-size: 0.8125rem;
  padding: 6px 16px;
  text-align: center;
  font-weight: 500;
  letter-spacing: -0.01em;
}

/* Header & Nav */
.site-header {
  background-color: var(--color-cream-canvas);
  border-bottom: 1px solid var(--color-linen-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-espresso);
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--color-driftwood);
  font-weight: 400;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-espresso);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-espresso);
  border-bottom-color: var(--color-amber-signal);
}

.nav-cta {
  background-color: var(--color-amber-signal);
  color: var(--color-espresso);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-warm-sm);
  transition: background-color 0.15s ease, transform 0.1s ease;
  white-space: nowrap;
}

.nav-cta:hover {
  background-color: var(--color-burnished-gold);
  color: var(--color-espresso);
  transform: translateY(-1px);
}

/* Mobile Nav Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-linen-border);
  border-radius: var(--radius-md);
  padding: 6px 10px;
  cursor: pointer;
  color: var(--color-espresso);
  font-size: 1.125rem;
}

/* Main Container */
.main-content {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px 60px;
  width: 100%;
}

/* Breadcrumbs */
.breadcrumbs {
  font-size: 0.8125rem;
  color: var(--color-driftwood);
  margin-bottom: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumbs a {
  color: var(--color-driftwood);
}

.breadcrumbs a:hover {
  color: var(--color-espresso);
}

.breadcrumbs span.separator {
  color: var(--color-stone-mist);
}

.breadcrumbs span.current {
  color: var(--color-espresso);
  font-weight: 500;
}

/* Hero Section */
.hero {
  margin-bottom: 48px;
}

.hero-badge {
  display: inline-block;
  background-color: var(--color-honey-wash);
  color: var(--color-espresso);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.hero-title {
  font-size: 2.75rem;
  line-height: 1.15;
  font-weight: 700;
  color: var(--color-espresso);
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  max-width: 900px;
}

.hero-subtitle {
  font-size: 1.1875rem;
  color: var(--color-bark);
  line-height: 1.45;
  max-width: 800px;
}

.article-meta {
  margin-top: 18px;
  font-size: 0.8125rem;
  color: var(--color-driftwood);
  display: flex;
  align-items: center;
  gap: 16px;
  border-top: 1px solid var(--color-linen-border);
  padding-top: 14px;
}

/* Article Layout: Two-column on desktop (content + sidebar) */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 48px;
  align-items: start;
}

.article-body {
  background-color: var(--color-pure-paper);
  border: 1px solid var(--color-linen-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-warm-md);
  padding: 40px;
  max-width: 100%;
}

.prose {
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-bark);
}

.prose h2 {
  font-size: 1.625rem;
  line-height: 1.25;
  color: var(--color-espresso);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 36px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-linen-border);
  padding-bottom: 8px;
}

.prose h3 {
  font-size: 1.25rem;
  line-height: 1.3;
  color: var(--color-espresso);
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-top: 24px;
  margin-bottom: 12px;
}

.prose p {
  margin-bottom: 18px;
}

.prose ul, .prose ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.prose li {
  margin-bottom: 8px;
}

.prose strong {
  color: var(--color-espresso);
  font-weight: 600;
}

.prose blockquote {
  border-left: 3px solid var(--color-amber-signal);
  background-color: var(--color-cream-canvas);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
  font-style: italic;
  color: var(--color-espresso);
}

/* Callout Box / Key Takeaway */
.callout {
  background-color: var(--color-cream-canvas);
  border: 1px solid var(--color-linen-border);
  border-left: 4px solid var(--color-espresso);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 28px 0;
}

.callout-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-espresso);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 90px;
}

.sidebar-widget {
  background-color: var(--color-pure-paper);
  border: 1px solid var(--color-linen-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-warm-sm);
  padding: 24px;
}

.sidebar-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-espresso);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--color-linen-border);
  padding-bottom: 8px;
}

.toc-list {
  list-style: none;
  padding: 0;
}

.toc-list li {
  margin-bottom: 10px;
  font-size: 0.875rem;
}

.toc-list a {
  color: var(--color-bark);
  display: block;
}

.toc-list a:hover {
  color: var(--color-espresso);
  padding-left: 4px;
}

/* Cards Grid (Home & Category Hubs) */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
  margin-top: 32px;
}

.card {
  background-color: var(--color-pure-paper);
  border: 1px solid var(--color-linen-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-warm-sm);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-warm-md);
  border-color: var(--color-stone-mist);
}

.card-tag {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-espresso);
  background-color: var(--color-honey-wash);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  align-self: flex-start;
  margin-bottom: 14px;
}

.card-title {
  font-size: 1.375rem;
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-espresso);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.card-desc {
  font-size: 0.9375rem;
  color: var(--color-bark);
  line-height: 1.5;
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-espresso);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-link::after {
  content: "→";
  transition: transform 0.15s ease;
}

.card:hover .card-link::after {
  transform: translateX(3px);
}

/* Footer */
.site-footer {
  background-color: var(--color-espresso);
  color: #ffffff;
  border-top: 1px solid var(--color-linen-border);
  padding: 56px 24px 36px;
  margin-top: 60px;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--color-warm-ash);
  line-height: 1.5;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-honey-wash);
  margin-bottom: 16px;
  font-weight: 600;
}

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

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--color-stone-mist);
  font-size: 0.875rem;
}

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

.footer-bottom {
  border-top: 1px solid rgba(227, 223, 213, 0.15);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--color-warm-ash);
  flex-wrap: wrap;
  gap: 16px;
}

/* Responsive */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  .main-nav {
    display: none;
  }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-cream-canvas);
    border-bottom: 1px solid var(--color-linen-border);
    padding: 20px;
    gap: 16px;
    box-shadow: var(--shadow-warm-md);
  }
  .menu-toggle {
    display: block;
  }
  .article-body {
    padding: 24px 18px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}