/* ==========================================================================
   SISTAEYES DESIGN SYSTEM — FUTURISTIC MINIMAL FINANCIAL DEFENSE
   Theme: High-Tech Institutional Light Surface + Luminescent Cybernetics
   ========================================================================== */

:root {
  /* Surface & Titanium Layers */
  --bg-body: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #FFFFFF;
  --bg-subtle: #F1F5F9;
  --bg-panel: #F8FAFC;
  --bg-terminal: #0B1120;
  --bg-terminal-inner: #020617;
  
  /* Primary Text & Typography */
  --text-main: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --text-inverted: #FFFFFF;

  /* Brand Luminescence Accents */
  --brand-primary: #2563EB;
  --brand-primary-hover: #1D4ED8;
  --brand-primary-glow: rgba(37, 99, 235, 0.25);
  --brand-cyan: #0284C7;
  --brand-teal: #0D9488;
  --brand-indigo: #4F46E5;

  /* Financial Risk Signals */
  --risk-normal: #10B981;
  --risk-normal-bg: #ECFDF5;
  --risk-caution: #F59E0B;
  --risk-caution-bg: #FFFBEB;
  --risk-high: #EF4444;
  --risk-high-bg: #FEF2F2;
  --risk-critical: #991B1B;
  --risk-critical-bg: #FEE2E2;

  /* Micro Borders & Cyber Glow */
  --border-subtle: #E2E8F0;
  --border-medium: #CBD5E1;
  --border-focus: #3B82F6;
  --border-luminescent: rgba(37, 99, 235, 0.2);

  /* Shadows & Elevation */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 25px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-glass: 0 0 0 1px rgba(226, 232, 240, 0.9), 0 8px 24px rgba(15, 23, 42, 0.05);
  --shadow-glow: 0 0 25px rgba(37, 99, 235, 0.15);

  /* Fonts */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Layout Consts */
  --container-max: 1240px;
  --container-wide: 1400px;
  --header-height: 80px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-body);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
}

/* Cybernetic Ambient Grid */
.bg-tech-grid {
  background-color: #F8FAFC;
  background-image: 
    radial-gradient(rgba(37, 99, 235, 0.08) 1px, transparent 1px),
    linear-gradient(to right, rgba(226, 232, 240, 0.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(226, 232, 240, 0.4) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* Typography Standards */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

h1 { font-size: clamp(2.5rem, 5vw, 3.8rem); font-weight: 800; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.85rem, 3.5vw, 2.65rem); font-weight: 800; letter-spacing: -0.03em; }
h3 { font-size: clamp(1.35rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.2rem; }
p { margin-bottom: 1rem; color: var(--text-body); }
p:last-child { margin-bottom: 0; }

.lead-text {
  font-size: 1.18rem;
  color: var(--text-body);
  line-height: 1.6;
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
}

.btn-primary {
  background: linear-gradient(135deg, #1D4ED8 0%, #2563EB 100%);
  color: #FFFFFF;
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #1E40AF 0%, #1D4ED8 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
  transform: translateY(-1px);
}

.btn-secondary {
  background: #FFFFFF;
  color: var(--text-main);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover {
  background: var(--bg-subtle);
  border-color: var(--text-muted);
  transform: translateY(-1px);
}

.btn-dark {
  background: #0F172A;
  color: #FFFFFF;
  border: 1px solid #334155;
}
.btn-dark:hover {
  background: #1E293B;
  color: #FFFFFF;
}

.btn-sm { padding: 0.45rem 0.95rem; font-size: 0.85rem; }
.btn-lg { padding: 0.95rem 2rem; font-size: 1.05rem; }

/* Badges & Indicators */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge-blue { background: #EFF6FF; color: #1D4ED8; border: 1px solid #BFDBFE; }
.badge-slate { background: #F1F5F9; color: #475569; border: 1px solid #CBD5E1; }
.badge-emerald { background: var(--risk-normal-bg); color: #047857; border: 1px solid #A7F3D0; }
.badge-amber { background: var(--risk-caution-bg); color: #B45309; border: 1px solid #FDE68A; }
.badge-crimson { background: var(--risk-high-bg); color: #B91C1C; border: 1px solid #FECACA; }

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.dot-emerald { background-color: var(--risk-normal); box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2); }
.dot-amber { background-color: var(--risk-caution); box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2); }
.dot-crimson { background-color: var(--risk-high); box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2); }
.dot-pulse { animation: pulseDot 2s infinite; }

@keyframes pulseDot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.25); opacity: 1; box-shadow: 0 0 10px rgba(37, 99, 235, 0.7); }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.sim-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  border-radius: var(--radius-full);
  color: #92400E;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
}

/* Global Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}
.brand-logo img {
  height: 38px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-body);
  transition: var(--transition);
  position: relative;
  padding: 0.5rem 0;
}
.nav-link:hover, .nav-link.active {
  color: var(--brand-primary);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--brand-primary);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-main);
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 5rem 0 4rem;
  border-bottom: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}
.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.hero-headline {
  font-size: clamp(2.6rem, 4.8vw, 3.8rem);
  line-height: 1.12;
  font-weight: 800;
  color: var(--text-main);
}
.hero-headline span {
  background: linear-gradient(135deg, #1E3A8A 0%, #2563EB 50%, #0284C7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-lead {
  font-size: 1.18rem;
  color: var(--text-body);
  line-height: 1.6;
}
.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Hero Visual Card */
.hero-visual-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}
.card-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background: #0F172A;
  color: #FFFFFF;
}
.card-header-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.hero-graph-viewport {
  padding: 1.5rem;
  background: #FFFFFF;
  position: relative;
  min-height: 280px;
}
.hero-live-telemetry {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: #F8FAFC;
  border-top: 1px solid var(--border-subtle);
}
.telemetry-item {
  display: flex;
  flex-direction: column;
}
.telemetry-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.telemetry-val {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

/* Global Sections */
.section {
  padding: 6rem 0;
  position: relative;
}
.section-subtle {
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.section-dark {
  background-color: #0F172A;
  color: #FFFFFF;
}
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 {
  color: #FFFFFF;
}
.section-dark p {
  color: #94A3B8;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3.5rem auto;
}
.section-header.text-left {
  text-align: left;
  margin-left: 0;
}
.section-title {
  margin-top: 0.75rem;
  margin-bottom: 1rem;
}
.section-description {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* SECTION: INTELLIGENCE LOOP */
.loop-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-md);
}
.loop-steps-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 0.75rem;
  margin-bottom: 2rem;
}
.loop-step-item {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem 0.5rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}
.loop-step-item:hover, .loop-step-item.active {
  background: #FFFFFF;
  border-color: var(--brand-primary);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
  transform: translateY(-2px);
}
.loop-step-item.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 8px solid var(--brand-primary);
}
.loop-step-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: 0.35rem;
}
.loop-step-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-main);
  text-transform: uppercase;
}
.loop-detail-pane {
  background: #F8FAFC;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

/* SECTION: DETECTION VS PREDICTION */
.paradigm-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.paradigm-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
}
.paradigm-card.highlight {
  border: 2px solid var(--brand-primary);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.12);
  background: #FFFFFF;
}
.paradigm-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}
.flow-step-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 1.5rem 0;
}
.flow-node {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  background: #F8FAFC;
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
}
.flow-node.active-node {
  background: #EFF6FF;
  border-color: #93C5FD;
  color: #1E40AF;
}

/* SECTION: LIVING GRAPH ENGINE */
.graph-explorer-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 340px;
}
.graph-canvas-container {
  padding: 1.5rem;
  position: relative;
  background: radial-gradient(rgba(203, 213, 225, 0.4) 1px, transparent 1px);
  background-size: 20px 20px;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.graph-sidebar {
  background: #F8FAFC;
  border-left: 1px solid var(--border-subtle);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.node-entity-card {
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-xs);
}

/* SECTION: RISK TRAJECTORY */
.trajectory-stepper {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.5rem;
  margin: 2.5rem 0;
}
.trajectory-step {
  padding: 1.25rem 0.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-align: center;
  transition: var(--transition);
}
.trajectory-step.active {
  border-color: var(--risk-high);
  background: #FEF2F2;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.15);
}
.traj-state-title {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
}

/* SECTION: AI INVESTIGATOR TERMINAL */
.investigator-workspace {
  background: #0F172A;
  color: #F8FAFC;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.35);
  overflow: hidden;
  border: 1px solid #334155;
}
.investigator-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: #1E293B;
  border-bottom: 1px solid #334155;
}
.case-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.case-tab-btn {
  background: #0F172A;
  border: 1px solid #334155;
  color: #94A3B8;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.case-tab-btn.active, .case-tab-btn:hover {
  background: #2563EB;
  border-color: #3B82F6;
  color: #FFFFFF;
}
.investigator-body {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  min-height: 520px;
}
.investigator-console {
  padding: 1.75rem;
  border-right: 1px solid #334155;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.sim-prompt-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.prompt-chip {
  background: #1E293B;
  border: 1px solid #475569;
  color: #CBD5E1;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  cursor: pointer;
  transition: var(--transition);
}
.prompt-chip:hover {
  background: #334155;
  color: #FFFFFF;
  border-color: #94A3B8;
}
.ai-response-box {
  background: #020617;
  border: 1px solid #1E293B;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: #E2E8F0;
  min-height: 240px;
  overflow-y: auto;
  white-space: pre-wrap;
}

/* Evidence Chain Panel */
.evidence-chain-panel {
  padding: 1.75rem;
  background: #0A0F1D;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.evidence-tier {
  border-left: 2px solid #334155;
  padding-left: 1rem;
  margin-bottom: 0.5rem;
}
.evidence-tier.observed { border-left-color: #3B82F6; }
.evidence-tier.inferred { border-left-color: #F59E0B; }
.evidence-tier.predicted { border-left-color: #EF4444; }
.evidence-tier.recommended { border-left-color: #10B981; }

.tier-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}
.tier-label.observed { color: #60A5FA; }
.tier-label.inferred { color: #FBBF24; }
.tier-label.predicted { color: #F87171; }
.tier-label.recommended { color: #34D399; }

/* SECTION: COUNTERFACTUAL MATRIX */
.counterfactual-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
}
.action-selector-bar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.action-btn {
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-medium);
  background: #F8FAFC;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}
.action-btn.active {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #FFFFFF;
}

.counterfactual-results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.metric-compare-card {
  background: #F8FAFC;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
}
.metric-val-large {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  margin: 0.5rem 0;
}

/* SECTION: PRODUCT SANDBOX */
.sandbox-card {
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2.5rem;
}
.sandbox-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}
.control-slider-group {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.slider-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.slider-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 600;
}
.slider-val {
  font-family: var(--font-mono);
  color: var(--brand-primary);
}
input[type="range"] {
  width: 100%;
  accent-color: var(--brand-primary);
  cursor: pointer;
}

.sandbox-results-panel {
  background: #F8FAFC;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* USE CASES & SOLUTIONS */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}
.usecase-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.usecase-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-focus);
}

/* FORM ELEMENTS */
.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.form-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-medium);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-main);
  background: #FFFFFF;
  transition: var(--transition);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* FOOTER */
.site-footer {
  background: #0F172A;
  color: #94A3B8;
  padding: 4.5rem 0 2rem;
  border-top: 1px solid #1E293B;
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1.2fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}
.footer-brand h4 { color: #FFFFFF; margin-bottom: 0.5rem; }
.footer-links-title { color: #FFFFFF; font-size: 0.95rem; font-weight: 700; margin-bottom: 1rem; }
.footer-links-list { list-style: none; display: flex; flex-direction: column; gap: 0.65rem; }
.footer-links-list a { color: #94A3B8; text-decoration: none; transition: var(--transition); }
.footer-links-list a:hover { color: #FFFFFF; }
.footer-bottom {
  border-top: 1px solid #1E293B;
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}



/* ==========================================================================
   INTERACTIVE PREDICTIVE FINANCIAL DEFENSE ENGINE (HIGH-FIDELITY ARCHITECTURE)
   ========================================================================== */
.defense-engine-card {
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  box-shadow: 0 16px 40px -8px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(226, 232, 240, 0.8);
  padding: 3rem 2.5rem;
  margin: 2rem 0;
  position: relative;
  overflow: hidden;
}

.defense-engine-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #0B132B 0%, #2563EB 50%, #0B132B 100%);
}

.engine-header-group {
  text-align: center;
  margin-bottom: 2rem;
}

.engine-header-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #0F172A;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  font-family: var(--font-sans);
}

.engine-header-subtitle {
  font-size: 0.95rem;
  color: #64748B;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Control & Scenario Bar */
.engine-controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #F8FAFC;
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 0.85rem 1.25rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.engine-scenario-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.scenario-pill {
  padding: 0.45rem 0.9rem;
  border-radius: 20px;
  border: 1px solid var(--border-medium);
  background: #FFFFFF;
  color: var(--text-body);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.scenario-pill:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: #EFF6FF;
}

.scenario-pill.active {
  background: #2563EB;
  color: #FFFFFF;
  border-color: #2563EB;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.engine-action-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-sim-play {
  background: #0F172A;
  color: #FFFFFF;
  border: none;
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.btn-sim-play:hover {
  background: #2563EB;
}

.btn-sim-play.playing {
  background: #DC2626;
}

.btn-sim-pulse {
  background: #EFF6FF;
  color: #1D4ED8;
  border: 1px solid #BFDBFE;
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.btn-sim-pulse:hover {
  background: #DBEAFE;
}

/* 4-Column Architecture Grid */
.engine-architecture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
}

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

.col-header-pill {
  padding: 0.85rem 1rem;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.col-header-pill.pill-dark {
  background: #0B132B;
  color: #FFFFFF;
  border: 1px solid #1E293B;
}

.col-header-pill.pill-blue {
  background: #2563EB;
  color: #FFFFFF;
  border: 1px solid #1D4ED8;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.col-nodes-stack {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  flex: 1;
}

/* Interactive Node Card */
.engine-node-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 10px;
  padding: 1.1rem 1.15rem;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  text-align: left;
}

.engine-node-card:hover {
  transform: translateY(-2px);
  border-color: #93C5FD;
  box-shadow: 0 6px 16px -2px rgba(37, 99, 235, 0.12);
}

.engine-node-card.active-selected {
  border-color: #2563EB !important;
  box-shadow: 0 0 0 2px #2563EB, 0 8px 24px -4px rgba(37, 99, 235, 0.25) !important;
  background: #F8FAFC !important;
}

.engine-node-card.pulse-glow {
  animation: nodePulseGlow 1.2s ease-in-out infinite alternate;
}

@keyframes nodePulseGlow {
  0% {
    box-shadow: 0 0 0 2px #2563EB, 0 0 15px rgba(37, 99, 235, 0.3);
    transform: scale(1.02);
  }
  100% {
    box-shadow: 0 0 0 3px #38BDF8, 0 0 25px rgba(56, 189, 248, 0.6);
    transform: scale(1.03);
  }
}

.node-card-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-card-sub {
  font-size: 0.78rem;
  color: #64748B;
  line-height: 1.35;
}

/* Specialized Node Theming from image */
.engine-node-card.node-green-tint {
  background: #ECFDF5;
  border-color: #A7F3D0;
}
.engine-node-card.node-green-tint .node-card-title {
  color: #059669;
}

.engine-node-card.node-red-tint {
  background: #FEF2F2;
  border-color: #FECACA;
}
.engine-node-card.node-red-tint .node-card-title {
  color: #DC2626;
}

.engine-node-card.node-yellow-tint {
  background: #FFFBEB;
  border-color: #FDE68A;
}
.engine-node-card.node-yellow-tint .node-card-title {
  color: #D97706;
}

.engine-node-card.node-orange-tint {
  background: #FFF7ED;
  border-color: #FED7AA;
}
.engine-node-card.node-orange-tint .node-card-title {
  color: #EA580C;
}

.engine-node-card.node-feedback-dashed {
  background: #EFF6FF;
  border: 2px dashed #3B82F6;
}
.engine-node-card.node-feedback-dashed .node-card-title {
  color: #2563EB;
}

/* Engine Inspector & Telemetry Console Below */
.engine-inspector-panel {
  margin-top: 2.25rem;
  background: #0B1120;
  border: 1px solid #1E293B;
  border-radius: 14px;
  color: #CBD5E1;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.inspector-header {
  background: #020617;
  border-bottom: 1px solid #1E293B;
  padding: 0.85rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.inspector-body {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  padding: 1.5rem;
  gap: 1.5rem;
}

.inspector-telemetry-feed {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: #020617;
  border: 1px solid #1E293B;
  border-radius: 8px;
  padding: 1rem;
  height: 180px;
  overflow-y: auto;
  line-height: 1.6;
}

.inspector-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.inspector-stat-box {
  background: #1E293B;
  border: 1px solid #334155;
  border-radius: 8px;
  padding: 0.85rem;
}

.inspector-stat-label {
  font-size: 0.72rem;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.inspector-stat-val {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: #FFFFFF;
}

/* Responsive adjustments for Defense Engine */
@media (max-width: 1024px) {
  .engine-architecture-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  .inspector-body {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .defense-engine-card {
    padding: 2rem 1.25rem;
  }
  .engine-header-title {
    font-size: 1.35rem;
  }
  .engine-architecture-grid {
    grid-template-columns: 1fr;
  }
  .engine-controls-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}