:root {
  /* Color Palette - High-end Consulting */
  --color-primary: #0A192F; /* Deep Navy */
  --color-primary-light: #172A45;
  --color-secondary: #D4AF37; /* Dark Gold Accent */
  --color-text-main: #333333;
  --color-text-muted: #666666;
  --color-bg-main: #FFFFFF;
  --color-bg-alt: #F8F9FA;
  --color-border: #E0E0E0;

  /* Typography */
  --font-serif: "Playfair Display", "Merriweather", serif; /* Elegant headings */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; /* Readable body */

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 80px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.4s ease;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--color-text-main);
  background-color: var(--color-bg-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-secondary);
}

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

/* Layout Classes */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

/* Header & Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: transform var(--transition-normal);
}

.site-header.hidden {
  transform: translateY(-100%);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
}

/* Refined Hover Micro-interaction */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-secondary);
  transition: width var(--transition-fast);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 2rem;
  font-family: var(--font-sans);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-bg-main);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  color: var(--color-bg-main);
  box-shadow: 0 4px 12px rgba(10, 25, 47, 0.2);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-bg-main);
}

/* Footer */
.site-footer {
  background-color: var(--color-primary);
  color: var(--color-bg-main);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-bg-main);
}

.footer-text {
  color: rgba(255, 255, 255, 0.7);
  max-width: 300px;
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-md);
  color: var(--color-bg-main);
}

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

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Scroll-linked Content Reveal - Base Classes */
.reveal-up {
  opacity: 1;
  transform: none;
  transition: opacity 0.8s ease, transform 0.8s ease;
}

/* Keep content visible by default (avoid blank sections in review/slow clients) */
.js-anim .reveal-up,
.js-anim .reveal-up.is-visible {
  opacity: 1;
  transform: none;
}

/* Utility */
.text-center { text-align: center; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* -- Additional Styles for Index & Layouts -- */

/* Hero Section */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  background-color: var(--color-primary);
  color: var(--color-bg-main);
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero h1 {
  color: var(--color-bg-main);
  font-size: 4.5rem;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  max-width: 600px;
  margin-bottom: var(--spacing-lg);
  color: rgba(255, 255, 255, 0.8);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.hero-actions .btn-outline {
  border-color: var(--color-bg-main);
  color: var(--color-bg-main);
}

.hero-actions .btn-outline:hover {
  background-color: var(--color-bg-main);
  color: var(--color-primary);
}

.hero-decoration {
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  pointer-events: none;
  opacity: 0.5;
}

/* Section Headers */
.section-header {
  margin-bottom: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.section-header.text-center {
  flex-direction: column;
  align-items: center;
}

.section-title {
  margin-bottom: var(--spacing-xs);
}

.section-desc {
  color: var(--color-text-muted);
  max-width: 700px;
}

/* Cards & Grids */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.capability-card {
  background: var(--color-bg-main);
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.capability-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.card-icon {
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
}

.text-link {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: inline-block;
  margin-top: var(--spacing-sm);
}

/* Split Layout */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.stats-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.stats-list li {
  border-left: 2px solid var(--color-secondary);
  padding-left: var(--spacing-sm);
}

.stats-list strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stats-list span {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.split-image img {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
}

/* Insights Grid */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-md);
}

.insight-card {
  background: var(--color-bg-main);
  padding: var(--spacing-md);
  border-top: 2px solid var(--color-border);
  transition: border-color var(--transition-fast);
}

.insight-card:hover {
  border-color: var(--color-secondary);
}

.insight-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-sm);
}

/* CTA Section */
.cta-section {
  background-color: var(--color-primary-light);
  color: var(--color-bg-main);
  padding: var(--spacing-xl) 0;
}

.cta-section h2 {
  color: var(--color-bg-main);
}

.cta-desc {
  max-width: 600px;
  margin: 0 auto var(--spacing-md);
  color: rgba(255,255,255,0.8);
}

.btn-large {
  padding: 1rem 3rem;
  font-size: 1rem;
}

.mt-md { margin-top: var(--spacing-md); }

/* Sticky Sections for effect */
.sticky-section {
  position: relative;
  z-index: 1;
  background-color: var(--color-bg-main);
}
.sticky-section.section-alt {
  background-color: var(--color-bg-alt);
}

/* Inner Page Headers */
.page-header {
  background-color: var(--color-primary);
  color: var(--color-bg-main);
  padding: 12rem 0 6rem;
  text-align: center;
}

.page-header h1 {
  color: var(--color-bg-main);
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  color: rgba(255,255,255,0.8);
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto;
}

/* -- Image Richness Enhancements -- */
.card-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  margin-bottom: var(--spacing-sm);
  border-bottom: 3px solid var(--color-secondary);
  transition: transform var(--transition-normal);
}

.capability-card, .insight-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.capability-card:hover .card-image,
.insight-card:hover .card-image {
  transform: scale(1.05);
}

.img-wrapper {
  overflow: hidden;
  margin: calc(var(--spacing-md) * -1) calc(var(--spacing-md) * -1) var(--spacing-md) calc(var(--spacing-md) * -1);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--spacing-xl);
  align-items: center;
  width: 100%;
  position: relative;
  z-index: 2;
}

.hero-image-container {
  position: relative;
  width: 100%;
  height: 65vh;
  min-height: 400px;
}

.hero-image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-left: 4px solid var(--color-secondary);
  box-shadow: -20px 20px 0px rgba(0,0,0,0.2);
}

@media (max-width: 992px) {
  .hero h1 { font-size: 3.5rem; }
  .split-layout { grid-template-columns: 1fr; gap: var(--spacing-lg); }
  .insights-grid { grid-template-columns: 1fr; }
  .hero-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); }
  .hero-image-container { height: 40vh; }
}

@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  
  .nav-links {
    display: none;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: var(--spacing-lg) 0;
  }

  .hero h1 { font-size: 2.8rem; }
  .hero-actions { flex-direction: column; }
}