@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

/* ==========================================================================
   Design System & Custom Tokens (DESIGN.md)
   ========================================================================== */
:root {
  /* Colors */
  --surface: #0f131d;
  --surface-dim: #0f131d;
  --surface-bright: #353944;
  --surface-container-lowest: #0a0e18;
  --surface-container-low: #171b26;
  --surface-container: #1c1f2a;
  --surface-container-high: #262a35;
  --surface-container-highest: #313540;
  
  --on-surface: #dfe2f1;
  --on-surface-variant: #c2c6d6;
  --inverse-surface: #dfe2f1;
  --inverse-on-surface: #2c303b;
  
  --outline: #8c909f;
  --outline-variant: #424754;
  --outline-grid: #1e293b;
  
  --primary: #adc6ff;         /* Electric Blue */
  --primary-hover: #c4d7ff;
  --on-primary: #002e6a;
  --primary-container: #004395;
  --primary-glow: rgba(173, 198, 255, 0.18);
  
  --secondary: #4edea3;       /* Mint/Neon Green */
  --on-secondary: #003824;
  --secondary-container: #005236;
  --secondary-glow: rgba(78, 222, 163, 0.2);
  
  --tertiary: #ffb786;        /* Orange Accent */
  --on-tertiary: #502400;
  
  --background: #0b0f19;      /* Deep space base color */
  --on-background: #dfe2f1;
  --error: #ffb4ab;
  
  /* Typography Scale */
  --font-headline: 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-code: 'JetBrains Mono', monospace;
  
  /* Spacing */
  --unit: 8px;
  --container-max: 1280px;
  --gutter: 24px;
  
  /* Rounded Corners */
  --radius-sm: 0.125rem;       /* 2px */
  --radius-default: 0.25rem;  /* 4px */
  --radius-md: 0.375rem;       /* 6px */
  --radius-lg: 0.5rem;         /* 8px */
  --radius-xl: 0.75rem;        /* 12px */
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--background);
  color: var(--on-background);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  background-image: 
    linear-gradient(to right, rgba(30, 41, 59, 0.15) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 41, 59, 0.15) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center top;
}

/* Technical Blueprint Grid Lines overlay */
.tech-grid-overlay {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--container-max);
  height: 100%;
  pointer-events: none;
  border-left: 1px dashed rgba(30, 41, 59, 0.25);
  border-right: 1px dashed rgba(30, 41, 59, 0.25);
  z-index: 1;
}

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

button, input, select, textarea {
  font-family: inherit;
  color: inherit;
  background: transparent;
  border: none;
}

/* ==========================================================================
   Typography Classes
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.headline-xl {
  font-size: clamp(2.5rem, 6vw, 4rem); /* 64px max */
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.headline-lg {
  font-size: clamp(2rem, 4vw, 3rem); /* 48px max */
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.headline-md {
  font-size: clamp(1.5rem, 3vw, 2rem); /* 32px max */
  font-weight: 600;
  line-height: 1.3;
}

.body-lg {
  font-size: 1.125rem; /* 18px */
  line-height: 1.6;
  color: var(--on-surface-variant);
  font-weight: 300;
}

.body-md {
  font-size: 1rem; /* 16px */
  line-height: 1.6;
  color: var(--on-surface-variant);
}

.code-sm {
  font-family: var(--font-code);
  font-size: 0.875rem; /* 14px */
  line-height: 1.5;
}

.label-caps {
  font-size: 0.75rem; /* 12px */
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  font-family: var(--font-body);
}

/* ==========================================================================
   Layout & Container Architecture
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  position: relative;
  z-index: 2;
}

.section-spacer {
  padding-top: 80px;
  padding-bottom: 80px;
  position: relative;
}

@media (max-width: 768px) {
  .section-spacer {
    padding-top: 48px;
    padding-bottom: 48px;
  }
}

/* Grid Reveals (1px Structural Lines) */
.structural-divider {
  height: 1px;
  background-color: var(--outline-grid);
  position: relative;
  width: 100%;
}

.structural-divider::after {
  content: '';
  position: absolute;
  top: -2px;
  left: 10%;
  width: 4px;
  height: 5px;
  background-color: var(--primary);
  box-shadow: 0 0 8px var(--primary);
}

.structural-divider-right::after {
  left: auto;
  right: 10%;
}

/* ==========================================================================
   Component Styling
   ========================================================================== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-default);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-body);
  gap: 8px;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--on-primary);
  box-shadow: 0 4px 20px rgba(173, 198, 255, 0.15);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: 0 4px 25px rgba(173, 198, 255, 0.3);
  transform: translateY(-1px);
}

.btn-secondary {
  border: 1px solid var(--outline-variant);
  color: var(--on-surface);
  background-color: rgba(22, 29, 44, 0.4);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 0 15px var(--primary-glow);
  transform: translateY(-1px);
}

.btn-icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* Premium Cards */
.tech-card {
  background-color: var(--surface-container-low);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

.tech-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(10, 14, 24, 0.5), 0 0 15px var(--primary-glow);
}

.tech-card:hover::before {
  transform: translateX(100%);
}

.card-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-default);
  background-color: rgba(173, 198, 255, 0.08);
  border: 1px solid rgba(173, 198, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
}

.tech-card:hover .card-icon-wrap {
  background-color: rgba(173, 198, 255, 0.15);
  color: #fff;
  box-shadow: 0 0 10px var(--primary-glow);
}

/* Glassmorphism Header */
.glass-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 72px;
  background-color: rgba(11, 15, 25, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--outline-grid);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: all var(--transition-normal);
}

.glass-header.scrolled {
  background-color: rgba(11, 15, 25, 0.85);
  height: 64px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: #fff;
}

.logo-symbol {
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-default);
  position: relative;
  overflow: hidden;
}

.logo-symbol::after {
  content: '';
  position: absolute;
  top: 5px;
  left: 5px;
  width: 14px;
  height: 14px;
  background-color: var(--background);
  border-radius: var(--radius-sm);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  position: relative;
  padding: 4px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--primary);
  transition: width var(--transition-fast);
}

.nav-link:hover {
  color: #fff;
}

.nav-link:hover::after {
  width: 100%;
}

/* Header status badge is decorative — give the room back to the nav on small screens */
@media (max-width: 900px) {
  .header-container .status-badge {
    display: none !important;
  }
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  cursor: pointer;
  z-index: 1100;
}

.mobile-nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--on-surface);
  transition: all var(--transition-fast);
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--surface-container-low);
    border-left: 1px solid var(--outline-grid);
    flex-direction: column;
    padding: 100px 40px;
    gap: 24px;
    transition: right var(--transition-normal);
    z-index: 1050;
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .mobile-nav-toggle {
    display: flex;
  }
  
  .mobile-nav-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .mobile-nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-nav-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* Status Chips / Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background-color: rgba(78, 222, 163, 0.08);
  border: 1px solid rgba(78, 222, 163, 0.2);
  border-radius: var(--radius-full);
  color: var(--secondary);
  font-family: var(--font-code);
  font-size: 0.75rem;
  font-weight: 500;
}

.status-badge-blue {
  background-color: rgba(173, 198, 255, 0.08);
  border-color: rgba(173, 198, 255, 0.2);
  color: var(--primary);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  background-color: currentColor;
  border-radius: 50%;
  position: relative;
}

.pulse-dot::after {
  content: '';
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border: 1px solid currentColor;
  border-radius: 50%;
  animation: pulse 1.6s infinite ease-out;
}

@keyframes pulse {
  0% {
    transform: scale(0.8);
    opacity: 1;
  }
  100% {
    transform: scale(2.4);
    opacity: 0;
  }
}

/* ==========================================================================
   Hero Section Styling
   ========================================================================== */
.hero-wrapper {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  padding-top: 140px;
  padding-bottom: 80px;
}

@media (max-width: 992px) {
  .hero-wrapper {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 120px;
    padding-bottom: 60px;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-badge-container {
    justify-content: center;
    display: flex;
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}

/* Tech Visualization Terminal in Hero */
.hero-visual {
  position: relative;
  width: 100%;
  height: 400px;
  background-color: var(--surface-container-lowest);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.visual-header {
  height: 36px;
  background-color: var(--surface-container-low);
  border-bottom: 1px solid var(--outline-grid);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.visual-dots {
  display: flex;
  gap: 6px;
}

.visual-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #353944;
}

.visual-dot.green { background-color: var(--secondary); }
.visual-dot.blue { background-color: var(--primary); }

.visual-title {
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--outline);
}

.visual-body {
  padding: 20px;
  height: calc(100% - 36px);
  position: relative;
}

/* Floating Metrics widget inside Hero */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.metric-mini {
  border-right: 1px solid var(--outline-grid);
  padding-right: 16px;
}

.metric-mini:last-child {
  border-right: none;
}

.metric-mini-value {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
}

.metric-mini-label {
  font-size: 0.75rem;
  color: var(--outline);
  margin-top: 4px;
}

/* ==========================================================================
   Section Intro
   ========================================================================== */
.section-intro {
  max-width: 640px;
  margin-bottom: 60px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.section-intro.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  align-items: center;
}

/* ==========================================================================
   Interactive Node Graph Section
   ========================================================================== */
.node-graph-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  background-color: var(--surface-container-low);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

@media (max-width: 992px) {
  .node-graph-container {
    grid-template-columns: 1fr;
  }
}

.node-graph-canvas {
  height: 480px;
  background-color: var(--surface-container-lowest);
  position: relative;
  overflow: hidden;
  border-right: 1px solid var(--outline-grid);
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 992px) {
  .node-graph-canvas {
    border-right: none;
    border-bottom: 1px solid var(--outline-grid);
    height: 400px;
  }
}

.node-graph-sidebar {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px;
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.node-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  background-color: var(--surface-container);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.node-list-item:hover {
  border-color: var(--primary);
  background-color: var(--surface-container-high);
}

.node-list-item.active {
  border-color: var(--primary);
  box-shadow: 0 0 12px var(--primary-glow);
  background-color: rgba(173, 198, 255, 0.05);
}

.node-item-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.node-status-toggle {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--outline-variant);
  position: relative;
  transition: all var(--transition-fast);
}

.node-list-item.active .node-status-toggle {
  border-color: var(--primary);
  background-color: var(--primary);
  box-shadow: 0 0 8px var(--primary);
}

/* Actual nodes styled in Canvas */
.svg-flow-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.canvas-node {
  position: absolute;
  width: 110px;
  height: 80px;
  background-color: var(--surface-container);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-md);
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: all var(--transition-normal);
  padding: 8px;
  text-align: center;
}

.canvas-node.active {
  border-color: var(--primary);
  box-shadow: 0 0 18px var(--primary-glow);
  background-color: var(--surface-container-high);
  transform: scale(1.05);
}

.canvas-node.success.active {
  border-color: var(--secondary);
  box-shadow: 0 0 18px var(--secondary-glow);
}

.canvas-node-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
}

.canvas-node-type {
  font-family: var(--font-code);
  font-size: 0.65rem;
  color: var(--outline);
}

/* SVG Line Animations */
.svg-flow-lines path {
  fill: none;
  stroke: var(--outline-variant);
  stroke-width: 2;
  transition: stroke var(--transition-normal);
}

.svg-flow-lines path.active {
  stroke: var(--primary);
  stroke-dasharray: 6 4;
  animation: dash 1s linear infinite;
}

.svg-flow-lines path.success-path.active {
  stroke: var(--secondary);
}

@keyframes dash {
  to {
    stroke-dashoffset: -20;
  }
}

/* Node layout placement values in app.js */

/* ==========================================================================
   ROI Savings Calculator Section
   ========================================================================== */
.calc-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  background-color: var(--surface-container-low);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-xl);
  padding: 40px;
}

@media (max-width: 992px) {
  .calc-container {
    grid-template-columns: 1fr;
    padding: 24px;
  }
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.slider-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--on-surface);
}

.slider-value-display {
  font-family: var(--font-code);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--primary);
  background-color: var(--surface-container-lowest);
  padding: 4px 10px;
  border-radius: var(--radius-default);
  border: 1px solid var(--outline-grid);
}

/* Slider Custom Styling */
input[type=range] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--outline-variant);
  border-radius: var(--radius-full);
  outline: none;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 0 10px var(--primary);
  transition: transform var(--transition-fast);
}

input[type=range]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

input[type=range]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 0 10px var(--primary);
  transition: transform var(--transition-fast);
}

.calc-outputs {
  background-color: var(--surface-container-lowest);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 32px;
  position: relative;
}

.output-hero-metric {
  text-align: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--outline-grid);
}

.output-hero-value {
  font-family: var(--font-headline);
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--secondary);
  text-shadow: 0 0 20px var(--secondary-glow);
  line-height: 1.1;
  margin-top: 8px;
}

.output-grid-sub {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.output-mini {
  background-color: var(--surface-container-low);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.output-mini-value {
  font-family: var(--font-code);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin-top: 4px;
}

.output-mini-label {
  font-size: 0.75rem;
  color: var(--outline);
}

.calc-action-block {
  text-align: center;
}

/* ==========================================================================
   Code Console Switcher Section
   ========================================================================== */
.code-console {
  background-color: var(--surface-container-lowest);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
}

.console-header {
  background-color: var(--surface-container-low);
  border-bottom: 1px solid var(--outline-grid);
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.console-tabs {
  display: flex;
  gap: 4px;
  height: 100%;
  align-items: flex-end;
}

.console-tab {
  padding: 8px 16px 10px 16px;
  font-family: var(--font-code);
  font-size: 0.8125rem;
  color: var(--outline);
  cursor: pointer;
  border-top-left-radius: var(--radius-md);
  border-top-right-radius: var(--radius-md);
  border: 1px solid transparent;
  border-bottom: none;
  background-color: transparent;
  transition: all var(--transition-fast);
}

.console-tab:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.02);
}

.console-tab.active {
  color: var(--primary);
  background-color: var(--surface-container-lowest);
  border-color: var(--outline-grid);
  font-weight: 500;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.3);
}

.console-actions-indicators {
  display: flex;
  align-items: center;
  gap: 12px;
}

.terminal-status-light {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--secondary);
}

.console-body {
  padding: 24px;
  position: relative;
  min-height: 280px;
}

.console-pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
}

.console-code {
  font-family: var(--font-code);
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

/* Syntax Highlighting */
.code-keyword { color: var(--tertiary); font-weight: 500; }
.code-string { color: var(--secondary); }
.code-comment { color: var(--outline); font-style: italic; }
.code-func { color: var(--primary); }
.code-number { color: #fcc289; }

/* Hide other syntax screens */
.console-code-pane {
  display: none;
}
.console-code-pane.active {
  display: block;
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(2px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Terminal Form Section
   ========================================================================== */
.terminal-form-wrapper {
  background-color: var(--surface-container-lowest);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-xl);
  overflow: hidden;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.terminal-form-body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 600px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.input-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
}

.input-label {
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--outline);
  display: flex;
  align-items: center;
  gap: 6px;
}

.input-label span {
  color: var(--primary);
}

.tech-input {
  background-color: var(--surface-container-low);
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-default);
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: #fff;
  transition: all var(--transition-fast);
}

.tech-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
  background-color: var(--surface-container);
}

.tech-textarea {
  resize: vertical;
  min-height: 120px;
}

/* Submission terminal diagnostics console overlay (app.js triggers this) */
.form-diagnostics {
  display: none;
  background-color: #05080e;
  border: 1px solid var(--outline-grid);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--outline);
  margin-top: 16px;
}

.form-diagnostics.active {
  display: block;
}

.diagnostics-line {
  line-height: 1.8;
  border-left: 2px solid transparent;
  padding-left: 8px;
  margin-bottom: 4px;
}

.diagnostics-line.success-line {
  color: var(--secondary);
  border-left-color: var(--secondary);
}

.diagnostics-line.progress-line {
  color: var(--primary);
  border-left-color: var(--primary);
}

.progress-bar-wrap {
  width: 100%;
  height: 4px;
  background-color: var(--surface-container);
  border-radius: var(--radius-full);
  margin-top: 8px;
  overflow: hidden;
}

.progress-bar-inner {
  width: 0%;
  height: 100%;
  background-color: var(--primary);
  transition: width 0.1s linear;
}

/* ==========================================================================
   Footer Section
   ========================================================================== */
.footer {
  border-top: 1px solid var(--outline-grid);
  background-color: var(--surface-container-lowest);
  padding: 60px 0 30px 0;
  font-size: 0.875rem;
  color: var(--outline);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand-desc {
  max-width: 320px;
  line-height: 1.6;
}

.footer-links-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-links-title {
  font-family: var(--font-headline);
  font-weight: 600;
  color: #fff;
  font-size: 0.9375rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.footer-bottom {
  border-top: 1px solid var(--outline-grid);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 600px) {
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* ==========================================================================
   Interactive Enhancements (scroll reveals, 3D tilt, particles, counters)
   ========================================================================== */

/* Scroll progress bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform-origin: 0 0;
  transform: scaleX(0);
  z-index: 2000;
  pointer-events: none;
}

/* Hero particle network canvas */
#hero-particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* Hero entrance animation (pure CSS, runs on load) */
@media (prefers-reduced-motion: no-preference) {
  .hero-content > * {
    opacity: 0;
    animation: hero-rise 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }
  .hero-content > *:nth-child(1) { animation-delay: 0.05s; }
  .hero-content > *:nth-child(2) { animation-delay: 0.15s; }
  .hero-content > *:nth-child(3) { animation-delay: 0.25s; }
  .hero-content > *:nth-child(4) { animation-delay: 0.35s; }

  .hero-visual {
    opacity: 0;
    animation: hero-rise 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
  }
}

@keyframes hero-rise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero visual: 3D perspective tilt (JS drives the transform) */
.hero-visual {
  will-change: transform;
  transition: box-shadow var(--transition-normal);
}

.hero-visual:hover {
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.7), 0 0 30px var(--primary-glow);
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: var(--reveal-delay, 0s);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* 3D tilt cards: cursor-tracking glow layer */
.tech-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    360px circle at var(--mx, 50%) var(--my, 50%),
    rgba(173, 198, 255, 0.09),
    transparent 65%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.tech-card:hover::after {
  opacity: 1;
}

/* Traveling pulse dots along simulator flow paths */
.flow-dot {
  filter: drop-shadow(0 0 4px currentColor);
  pointer-events: none;
}

/* Draggable simulator nodes */
.canvas-node {
  touch-action: none;
}

.canvas-node.dragging {
  cursor: grabbing;
  transition: none;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6), 0 0 24px var(--primary-glow);
  z-index: 10;
}

/* Scrollspy: highlight active nav link */
.nav-link.active-nav {
  color: #fff;
}

.nav-link.active-nav::after {
  width: 100%;
}

/* Calculator value bump on change */
.bump {
  animation: value-bump 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes value-bump {
  0% { transform: scale(1); }
  40% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .bump {
    animation: none;
  }
}

/* Back-to-top floating button */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background-color: var(--surface-container-high);
  border: 1px solid var(--outline-variant);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition:
    opacity var(--transition-normal),
    visibility var(--transition-normal),
    transform var(--transition-normal),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
  z-index: 1500;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--primary);
  box-shadow: 0 0 15px var(--primary-glow);
}

.back-to-top:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}