/* Custom CSS Properties based on site design tokens */
:root {
  --font-display: 'Spline Sans Mono', monospace;
  --font-body: 'Encode Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  
  --color-primary: #1b1f26;
  --color-secondary: #5e6774;
  --color-accent: #c0392b;
  --color-surface: #eceef1;
  --color-ink: #0f1319;
  --color-white: #ffffff;
  --color-border: #d0d5dd;
  --color-border-dark: #2c323e;
  --color-code-bg: #14181f;

  --site-max-width: 1080px;
}

/* Base Reset & Typography */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-ink);
  background-color: #f7f8fa;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Site Shell Layout */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-layout {
  flex: 1 0 auto;
}

.site-container {
  width: 100%;
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Split Header */
.header-container {
  background-color: var(--color-primary);
  border-bottom: 3px solid var(--color-accent);
}

.header-inner {
  width: 100%;
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
}

/* Stacked Row 1: Nav links LEFT-aligned */
.nav-row {
  border-bottom: 1px solid var(--color-border-dark);
  padding: 0.75rem 0;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: #a0a7b5;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0;
  transition: color 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  border-bottom: 2px solid var(--color-accent);
}

/* Stacked Row 2: Brand RIGHT-aligned in large type */
.brand-row {
  padding: 1.25rem 0;
  display: flex;
  justify-content: flex-end;
  text-align: right;
}

.brand-link {
  text-decoration: none;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-end;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.02em;
  line-height: 1.1;
  text-transform: uppercase;
}

.brand-sub {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-top: 0.25rem;
}

/* Split Screen Homepage Opening */
.intro-split-wrapper {
  display: flex;
  min-height: 65vh;
  width: 100%;
  border-bottom: 2px solid var(--color-primary);
}

.intro-split-left {
  flex: 1 1 50%;
  width: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 4rem 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: 1px solid var(--color-border-dark);
}

.intro-display-title {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-white);
  text-transform: uppercase;
}

.intro-display-subtitle {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 1.5rem;
}

.intro-split-right {
  flex: 1 1 50%;
  width: 50%;
  background-color: var(--color-surface);
  color: var(--color-ink);
  padding: 4rem 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.intro-prose-box p {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
  color: #2a303c;
}

.intro-prose-box p:last-child {
  margin-bottom: 0;
}

/* Pitch Section */
.pillars-section {
  background-color: var(--color-white);
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.pillars-heading {
  font-family: var(--font-display);
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-primary);
}

.pillars-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.pillar-block {
  background-color: #f2f4f7;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  padding: 1.5rem;
}

.pillar-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.pillar-desc {
  font-size: 0.95rem;
  color: var(--color-secondary);
  line-height: 1.5;
}

/* Article Presentation System (lead-plus-rest) */
.articles-system-section {
  padding: 4rem 0;
}

.section-title-mono {
  font-family: var(--font-display);
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  margin-bottom: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-primary);
}

.primary-lead-article {
  background-color: var(--color-white);
  border: 2px solid var(--color-primary);
  padding: 2.5rem;
  margin-bottom: 3rem;
  position: relative;
}

.lead-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: 0.3rem 0.6rem;
  margin-bottom: 1rem;
}

.lead-title {
  font-family: var(--font-display);
  font-size: 1.85rem;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.lead-title a {
  color: var(--color-primary);
  text-decoration: none;
}

.lead-title a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.lead-excerpt {
  font-size: 1.1rem;
  color: #38404e;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  max-width: 900px;
}

.lead-date {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--color-secondary);
}

.secondary-titles-compact {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 2rem;
  margin-bottom: 3rem;
}

.compact-list-header {
  font-family: var(--font-display);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.compact-titles-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.compact-title-item {
  display: flex;
  align-items: baseline;
  padding: 0.85rem 0;
  border-bottom: 1px dashed var(--color-border);
}

.compact-title-item:last-child {
  border-bottom: none;
}

.item-date-tag {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-secondary);
  width: 130px;
  flex-shrink: 0;
}

.compact-title-link {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.compact-title-link:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

/* Pillar Promo Block */
.pillar-promo-block {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-left: 6px solid var(--color-accent);
  padding: 2.5rem;
  margin-top: 2rem;
}

.promo-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  color: var(--color-white);
}

.promo-text {
  font-size: 1rem;
  color: #c2c8d2;
  margin-bottom: 1.5rem;
  max-width: 850px;
}

.promo-link {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  transition: background-color 0.15s ease;
}

.promo-link:hover {
  background-color: #a93226;
}

/* Section Header Banner */
.section-header-banner {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 3.5rem 0;
  border-bottom: 3px solid var(--color-accent);
}

.page-title-mono {
  font-family: var(--font-display);
  font-size: 2.25rem;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.section-lead-text {
  font-size: 1.15rem;
  color: #b0b8c6;
  max-width: 800px;
}

.section-content-body {
  padding: 3.5rem 1.5rem;
}

/* Single Article & Page Layout */
.article-page-container {
  padding-bottom: 4rem;
}

.article-header {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 4rem 0 3.5rem 0;
  border-bottom: 3px solid var(--color-accent);
  margin-bottom: 3rem;
}

.article-meta-bar {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 1.25rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
}

.meta-section-tag {
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.meta-date {
  color: #9aa2b0;
}

.article-main-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-white);
  margin-bottom: 1.25rem;
  max-width: 950px;
}

.article-deck {
  font-size: 1.2rem;
  line-height: 1.6;
  color: #c8d0dc;
  max-width: 850px;
}

.article-body-layout {
  max-width: 820px;
  margin: 0 auto;
}

/* MANDATORY LIST RULE FOR BOTH PROSE AND INTRO CONTAINERS */
.article-content ul,
.article-content ol,
.intro-content ul,
.intro-content ol {
  margin: 1.25rem 0;
  padding-left: 2rem;
}

.article-content li,
.intro-content li {
  margin-bottom: 0.5rem;
  line-height: 1.65;
}

.article-content p {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--color-ink);
  margin-bottom: 1.5rem;
}

.article-content h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.3;
  color: var(--color-primary);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--color-primary);
  text-transform: uppercase;
}

.article-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.article-content blockquote {
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-surface);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  font-style: italic;
  color: #2c3340;
}

.article-content a {
  color: var(--color-accent);
  text-decoration: underline;
}

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

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.95rem;
}

.article-content th,
.article-content td {
  border: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
  text-align: left;
}

.article-content th {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 0.85rem;
  text-transform: uppercase;
}

.article-content tr:nth-child(even) {
  background-color: #f2f4f7;
}

.article-footer-nav {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 2px solid var(--color-border);
}

.article-disclaimer {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-secondary);
  padding: 1.25rem;
  font-size: 0.9rem;
  color: var(--color-secondary);
  margin-bottom: 2rem;
}

.back-link-box {
  margin-top: 1.5rem;
}

.back-to-list-link {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-primary);
  transition: all 0.15s ease;
}

.back-to-list-link:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* Footer Styling */
.footer-container {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-top: 4px solid var(--color-accent);
  padding: 4rem 0 2rem 0;
  margin-top: auto;
}

.footer-inner {
  width: 100%;
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-branding {
  margin-bottom: 2rem;
}

.footer-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-white);
}

.footer-tagline {
  font-size: 0.95rem;
  color: #9fa7b4;
  margin-top: 0.3rem;
}

.footer-nav {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border-dark);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
}

.footer-links a {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: #b0b8c6;
  text-decoration: none;
  text-transform: uppercase;
}

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

.footer-notice {
  font-size: 0.85rem;
  color: #788292;
  line-height: 1.5;
}

/* Responsiveness & Mobile Media Queries */
@media (max-width: 768px) {
  .brand-row {
    justify-content: flex-start;
    text-align: left;
  }

  .brand-link {
    align-items: flex-start;
  }

  .intro-split-wrapper {
    flex-direction: column;
    min-height: auto;
  }

  .intro-split-left,
  .intro-split-right {
    width: 100%;
    flex: 1 1 100%;
    padding: 2.5rem 1.5rem;
  }

  .intro-display-title {
    font-size: 2rem;
  }

  .pillars-list {
    grid-template-columns: 1fr;
  }

  .primary-lead-article {
    padding: 1.5rem;
  }

  .lead-title {
    font-size: 1.4rem;
  }

  .compact-title-item {
    flex-direction: column;
    gap: 0.25rem;
  }

  .item-date-tag {
    width: auto;
  }

  .article-main-title {
    font-size: 1.75rem;
  }

  .article-header {
    padding: 2.5rem 0;
  }

  .article-body-layout {
    padding: 0 1rem;
  }

  .article-content table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

@media (max-width: 375px) {
  .site-container,
  .header-inner,
  .footer-inner {
    padding: 0 1rem;
  }

  .brand-title {
    font-size: 1.75rem;
  }

  .intro-display-title {
    font-size: 1.65rem;
  }

  .lead-title {
    font-size: 1.25rem;
  }

  .compact-title-link {
    font-size: 0.95rem;
  }
}