/* ==========================================
   DESIGN SYSTEM TOKENS & RESET
   ========================================== */
:root {
  /* Colors - Obsidian Editorial Palette */
  --bg-primary: hsl(222, 24%, 7%);
  --bg-secondary: hsl(222, 20%, 12%);
  --bg-tertiary: hsl(222, 18%, 18%);
  
  --accent-gold: hsl(38, 55%, 55%);
  --accent-gold-hover: hsl(38, 70%, 62%);
  --accent-gold-muted: hsl(38, 25%, 35%);
  
  --accent-blue: hsl(205, 80%, 55%);
  --accent-blue-muted: hsl(205, 30%, 30%);

  --text-primary: hsl(210, 30%, 96%);
  --text-secondary: hsl(215, 18%, 80%);
  --text-muted: hsl(215, 14%, 55%);

  --border-color: hsla(215, 20%, 25%, 0.4);
  --border-hover: hsla(38, 55%, 55%, 0.3);

  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: "Arial Narrow", "Avenir Next Condensed", "Segoe UI", Roboto, sans-serif;
  
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --glass-bg: rgba(15, 23, 42, 0.7);
  --glass-border: rgba(255, 255, 255, 0.05);
  --shadow-premium: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
}

/* Reset and Core Layout */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  -webkit-font-smoothing: antialiased;
  min-block-size: 100dvb;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 500px;
  background: radial-gradient(circle at 50% -100px, hsla(38, 55%, 55%, 0.12) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background-color: var(--accent-gold);
  color: var(--bg-primary);
  padding: 10px 20px;
  font-weight: 600;
  border-radius: 4px;
  z-index: 9999;
  transition: top 0.2s ease;
  text-decoration: none;
}
.skip-link:focus {
  top: 20px;
}

/* Typography elements */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  line-height: 1.25;
  font-weight: 600;
  text-wrap: balance; /* Modern line wrapping for headings */
}

a {
  color: var(--accent-gold);
  text-decoration: none;
  transition: var(--transition-smooth);
}
a:hover {
  color: var(--accent-gold-hover);
}

/* Main Landmark */
.main-landmark {
  flex: 1 0 auto;
  z-index: 1;
  inline-size: 100%;
}

/* ==========================================
   HEADER & NAVIGATION
   ========================================== */
.site-header {
  background-color: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding-block: 1.25rem;
}

.header-container {
  max-inline-size: 1200px;
  margin-inline: auto;
  padding-inline: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo a {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: inline-flex;
  gap: 0.35rem;
  letter-spacing: -0.02em;
}
.logo-prov {
  color: var(--accent-gold);
}
.logo-prov-sub {
  color: var(--text-primary);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding-block: 0.5rem;
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-gold);
  transition: var(--transition-smooth);
}
.nav-link:hover {
  color: var(--text-primary);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.nav-link.active {
  color: var(--accent-gold);
}

@media (max-width: 767px) {
  .site-header {
    padding-block: 1rem;
  }

  .header-container {
    flex-direction: column;
    gap: 0.9rem;
    align-items: flex-start;
  }

  .site-navigation {
    width: 100%;
  }

  .nav-list {
    width: 100%;
    gap: 1rem 1.25rem;
    flex-wrap: wrap;
  }

  .nav-link {
    font-size: 0.88rem;
  }
}

/* ==========================================
   HOME PAGE LAYOUT
   ========================================== */
.home-wrapper {
  max-inline-size: 1200px;
  margin-inline: auto;
  padding-inline: 1.5rem;
  padding-block: 4rem;
}

.hero-section {
  text-align: center;
  max-inline-size: 850px;
  margin-inline: auto;
  margin-block-end: 4.5rem;
}
.hero-title {
  font-size: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);
  margin-block-end: 1.5rem;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 0%, hsl(215, 20%, 75%) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Pillars */
.pillars-section {
  margin-block-end: 5.5rem;
}
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}
.pillar-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2.25rem;
  border-radius: 8px;
  transition: var(--transition-smooth);
}
.pillar-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-premium);
}
.pillar-kicker {
  display: inline-block;
  margin-block-end: 1rem;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--accent-gold-muted);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-gold);
}
.pillar-title {
  font-size: 1.35rem;
  margin-block-end: 0.75rem;
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.pillar-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Insights Preview Section */
.insights-preview-section {
  border-top: 1px solid var(--border-color);
  padding-block-start: 4rem;
}
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-block-end: 2.5rem;
}
.section-title {
  font-size: 1.85rem;
}
.section-link {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Insights grid using Subgrid */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

/* Each card spans 4 rows in the grid to keep titles and meta aligned */
.insight-card {
  display: grid;
  grid-row: span 4;
  grid-template-rows: subgrid;
  gap: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2.25rem;
  border-radius: 8px;
  transition: var(--transition-smooth);
}
.insight-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-premium);
  transform: translateY(-4px);
}
.card-meta {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-gold);
  font-weight: 600;
}
.card-title {
  font-size: 1.45rem;
  line-height: 1.3;
}
.card-title a {
  color: var(--text-primary);
}
.card-title a:hover {
  color: var(--accent-gold-hover);
}
.card-summary {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.card-link {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  align-self: end;
  padding-block-start: 0.5rem;
}

/* ==========================================
   LIST PAGE LAYOUT
   ========================================== */
.list-wrapper {
  max-inline-size: 900px;
  margin-inline: auto;
  padding-inline: 1.5rem;
  padding-block: 4.5rem;
}
.section-intro {
  margin-block-end: 3.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-block-end: 2rem;
}
.page-title {
  font-size: clamp(2rem, 1.5rem + 1.5vw, 2.75rem);
  margin-block-end: 0.75rem;
}
.page-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
}
.list-container {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}
.list-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}
@media (min-width: 650px) {
  .list-item {
    grid-template-columns: 200px 1fr;
    gap: 2rem;
  }
}
.item-meta {
  font-size: 0.85rem;
  color: var(--accent-gold);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.item-title {
  font-size: 1.6rem;
  margin-block-end: 0.75rem;
  line-height: 1.3;
}
.item-title a {
  color: var(--text-primary);
}
.item-title a:hover {
  color: var(--accent-gold-hover);
}
.item-summary {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-block-end: 1rem;
  line-height: 1.6;
}
.item-link {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================
   SINGLE POST LAYOUT
   ========================================== */
.post-wrapper {
  max-inline-size: 800px;
  margin-inline: auto;
  padding-inline: 1.5rem;
  padding-block: 5rem;
}
.post-header {
  margin-block-end: 3.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-block-end: 2.5rem;
}
.post-meta {
  font-size: 0.85rem;
  color: var(--accent-gold);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-block-end: 0.75rem;
}
.post-title {
  font-size: clamp(2rem, 1.5rem + 2vw, 3rem);
  margin-block-end: 1rem;
  letter-spacing: -0.02em;
}
.post-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  font-style: italic;
  font-family: var(--font-serif);
}

.post-content {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-secondary);
}
.post-content p {
  margin-block-end: 1.75rem;
}
.post-content h2 {
  font-size: 1.65rem;
  margin-block-start: 2.5rem;
  margin-block-end: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-block-end: 0.5rem;
  color: var(--text-primary);
}
.post-content h3 {
  font-size: 1.35rem;
  margin-block-start: 2rem;
  margin-block-end: 0.75rem;
  color: var(--text-primary);
}
.post-content ul, .post-content ol {
  margin-block-end: 1.75rem;
  padding-inline-start: 1.5rem;
}
.post-content li {
  margin-block-end: 0.5rem;
}

/* Images in single content */
.post-content img {
  max-inline-size: 100%;
  block-size: auto;
  border-radius: 6px;
  margin-block: 2rem;
  border: 1px solid var(--border-color);
  display: block;
}

/* Markdown Tables styling */
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin-block: 2.5rem;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
}
.post-content th {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 700;
  text-align: left;
  border-bottom: 2px solid var(--border-color);
  padding: 0.75rem 1rem;
}
.post-content td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}
.post-content tr:nth-child(even) {
  background-color: hsla(222, 20%, 15%, 0.3);
}

/* ==========================================
   FOOTER
   ========================================== */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding-block: 4rem;
  margin-block-start: auto;
}
.footer-container {
  max-inline-size: 1200px;
  margin-inline: auto;
  padding-inline: 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) {
  .footer-container {
    grid-template-columns: 2fr 1fr;
    align-items: center;
  }
}
.brand-text {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
  margin-block-end: 0.5rem;
}
.brand-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-inline-size: 450px;
}
.footer-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: left;
}
@media (min-width: 768px) {
  .footer-meta {
    text-align: right;
  }
}
.footer-meta p {
  margin-block-end: 0.5rem;
}
.disclaimer {
  font-style: italic;
}