/* ==========================================================================
   QuantSCM - Quantitative SCM Architecture & Factory Digital Systems
   Bespoke Design System & Stylesheet
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
  /* Color Palette */
  --bg-main: #080C14;
  --bg-surface: #0E1626;
  --bg-surface-raised: #142036;
  --bg-surface-hover: #1A2A47;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(16, 185, 129, 0.4);
  --border-cyan: rgba(6, 182, 212, 0.4);
  
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  --accent-emerald: #10B981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-cyan: #06B6D4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.2);
  --accent-indigo: #6366F1;
  --accent-purple: #8B5CF6;
  --accent-danger: #EF4444;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing & Layout */
  --container-max: 1240px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  background-color: var(--bg-main);
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

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

.text-center { text-align: center; }
.text-accent { color: var(--accent-emerald); }

.gradient-text {
  background: linear-gradient(135deg, #10B981 0%, #06B6D4 50%, #38BDF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* --- Section Structure --- */
.section {
  padding: 6.5rem 0;
  position: relative;
}

.section-header {
  margin-bottom: 3.5rem;
}

.sub-heading {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.35rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: #042F2E;
  font-weight: 700;
  box-shadow: 0 4px 16px var(--accent-emerald-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #34D399 0%, #10B981 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-emerald-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 0.9rem 1.8rem;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--accent-emerald);
  border-radius: var(--radius-sm);
  color: var(--accent-emerald);
  font-family: var(--font-mono);
  font-size: 1rem;
}

.logo-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--accent-cyan);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  margin-left: 0.25rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.85rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-cta-mobile {
  display: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* Language Switcher */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  transition: all var(--transition-fast);
  font-weight: 600;
}

.lang-btn:hover {
  color: var(--text-primary);
}

.lang-btn.active {
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.15);
}

.lang-divider {
  color: var(--border-subtle);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

/* --- Hero Section --- */
.hero-section {
  padding-top: 10rem;
  padding-bottom: 6rem;
  position: relative;
  overflow: hidden;
}

.glow-bg {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}

.glow-1 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, rgba(16, 185, 129, 0) 70%);
  top: 10%;
  left: 15%;
}

.glow-2 {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12) 0%, rgba(6, 182, 212, 0) 70%);
  top: 20%;
  right: 10%;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

.hero-container {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 960px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-emerald);
  margin-bottom: 2rem;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.2); }
  100% { opacity: 1; transform: scale(1); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 820px;
  margin: 0 auto 2.5rem;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 4rem;
  flex-wrap: wrap;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  padding: 1.5rem;
  background: rgba(14, 22, 38, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.metric-card {
  text-align: center;
  padding: 0.5rem;
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* --- Services / 4 Pillars --- */
.services-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.service-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.18);
  background: var(--bg-surface-raised);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.highlighted-card {
  border-color: var(--border-active);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.05) 0%, rgba(14, 22, 38, 1) 100%);
}

.card-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
}

.service-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-emerald);
  margin-bottom: 1.25rem;
}

.highlighted-card .service-icon-wrap {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.3);
}

.service-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.service-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.service-points {
  list-style: none;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.service-points li {
  font-size: 0.82rem;
  color: var(--text-primary);
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
}

.service-points li::before {
  content: "▹";
  color: var(--accent-emerald);
  font-size: 0.85rem;
  flex-shrink: 0;
}

.service-lead-tag {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

.service-lead-tag span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

/* --- Simulator Section --- */
.simulator-section {
  background: linear-gradient(180deg, var(--bg-main) 0%, #0A111F 100%);
}

.simulator-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.simulator-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 3rem;
}

.sim-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.sim-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.sim-desc {
  font-size: 1rem;
  color: var(--text-secondary);
}

.simulator-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2.5rem;
}

/* Controls */
.sim-controls {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sim-controls-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
}

.sim-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sim-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.sim-label-row label {
  color: var(--text-secondary);
  font-weight: 500;
}

.sim-val-display {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-cyan);
}

.sim-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  cursor: pointer;
}

.sim-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.sim-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.sim-slider-marks {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Results & KPI */
.sim-results {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sim-kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.sim-kpi {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  text-align: center;
}

.sim-kpi.primary {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--border-active);
}

.kpi-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
}

.sim-kpi.primary .kpi-tag {
  color: var(--accent-emerald);
}

.kpi-number {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
}

.sim-kpi.primary .kpi-number {
  color: var(--accent-emerald);
}

.kpi-subtext {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

.sim-chart-card {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chart-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.chart-legend {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot-red { background-color: var(--accent-danger); box-shadow: 0 0 6px var(--accent-danger); }
.dot-green { background-color: var(--accent-emerald); box-shadow: 0 0 6px var(--accent-emerald); }

.svg-container {
  width: 100%;
  height: 180px;
}

.svg-container svg {
  width: 100%;
  height: 100%;
}

.chart-insight {
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.02);
  border-left: 3px solid var(--accent-cyan);
  padding: 0.6rem 0.8rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: 1.4;
}

.sim-action-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(6, 182, 212, 0.08);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  gap: 1rem;
}

.sim-banner-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* --- Case Studies --- */
.cases-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.case-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.highlighted-case {
  border-color: var(--border-cyan);
}

.case-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.case-category {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent-cyan);
  letter-spacing: 0.05em;
  font-weight: 700;
}

.case-result {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}

.case-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.case-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.case-metrics-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border-subtle);
}

.case-metrics-row strong {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-emerald);
  display: block;
}

.case-metrics-row span {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* --- Leadership Section --- */
.leadership-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.leader-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: relative;
  transition: all var(--transition-normal);
}

.leader-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.35);
}

.leader-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1.5rem;
}

.leader-avatar {
  flex-shrink: 0;
}

.avatar-monogram {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(6, 182, 212, 0.2) 100%);
  border: 2px solid var(--accent-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  box-shadow: 0 0 18px rgba(16, 185, 129, 0.25);
}

.avatar-cyan {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 18px rgba(6, 182, 212, 0.25);
}

.leader-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.leader-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
}

.leader-alt-name {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.leader-role {
  font-size: 0.88rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.leader-location {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.leader-body {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  flex-grow: 1;
}

.leader-bio {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.leader-creds-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.cred-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.cred-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--accent-emerald);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.cred-row strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text-primary);
}

.cred-row p {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.leader-specialties {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.25rem;
  margin-top: auto;
}

.leader-specialties span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sm);
}

/* --- Publications --- */
.pub-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: 960px;
  margin: 0 auto;
}

.pub-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
}

.pub-badge {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-indigo);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.pub-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.pub-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.pub-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

/* --- Contact & Booking --- */
.contact-section {
  background: linear-gradient(180deg, var(--bg-main) 0%, #070B13 100%);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3.5rem;
}

.contact-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.contact-desc {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 1rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  font-size: 0.9rem;
}

.contact-item-icon {
  font-size: 1.25rem;
}

.contact-item strong {
  display: block;
  color: var(--text-primary);
}

.contact-item p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.contact-link {
  color: var(--accent-emerald);
  font-weight: 600;
}

.contact-link:hover {
  text-decoration: underline;
}

/* Form Styles */
.contact-form-card {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-size: 0.92rem;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-emerald);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.form-control::placeholder {
  color: var(--text-muted);
}

select.form-control option {
  background: #0E1626;
  color: var(--text-primary);
}

.form-status {
  margin-top: 1rem;
  font-size: 0.85rem;
  text-align: center;
}

.form-status.success {
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.1);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent-emerald);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2.5rem;
  background: var(--bg-main);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 3rem;
}

.footer-brand {
  max-width: 420px;
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 1rem 0 1.5rem;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.footer-links {
  display: flex;
  gap: 4rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.footer-col a {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

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

/* --- Responsive Breakpoints --- */
@media (max-width: 1100px) {
  .services-grid-4, .cases-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .leadership-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .hero-title { font-size: 2.8rem; }
  .simulator-layout { grid-template-columns: 1fr; }
  .contact-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .hero-title { font-size: 2.2rem; }
  .hero-subtitle { font-size: 1.05rem; }
  .hero-metrics { grid-template-columns: 1fr 1fr; }
  .services-grid-4, .cases-grid-4 { grid-template-columns: 1fr; }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
  }

  .nav-menu.open { display: flex; }
  .nav-cta-desktop { display: none; }
  .nav-cta-mobile { display: block; }
  .mobile-toggle { display: flex; }

  .sim-kpi-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .pub-grid { grid-template-columns: 1fr; }
  .footer-container { flex-direction: column; gap: 2rem; }
  .footer-links { flex-direction: column; gap: 1.5rem; }
}

/* --- Simulator Rebuild States (Infeasible & Shortfall) --- */
.sim-infeasible-msg {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  color: var(--accent-danger);
  font-size: 1rem;
  line-height: 1.6;
  text-align: center;
  font-style: italic;
  margin-bottom: 1.5rem;
}

.sim-kpi.shortfall .kpi-number {
  color: var(--accent-danger);
}