/* ==========================================================================
   Metrologia Website — styles.css
   Copyright (c) 2024-2026 Metrologia, LLC. All Rights Reserved.
   Phase 1: Static HTML for GoDaddy upload
   ========================================================================== */

/* --- CSS Variables (Design System) --- */
:root {
  /* Colors */
  --primary-dark: #0A0A0A;
  --primary-blue: #2563EB;
  --primary-blue-light: #3B82F6;
  --accent-cyan: #06B6D4;
  --accent-green: #10B981;
  --accent-amber: #F59E0B;
  --surface-dark: #18181B;
  --surface-dark-alt: #1E293B;
  --surface-light: #F8FAFC;
  --text-primary: #F7F7F7;
  --text-secondary: #A1A1AA;
  --text-dark: #18181B;
  --text-dark-secondary: #52525B;
  --border-dark: #27272A;
  --border-light: #E4E4E7;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0A0A0A 0%, #0F172A 50%, #0A0A0A 100%);
  --gradient-blue: linear-gradient(135deg, #1E3A8A 0%, #2563EB 100%);
  --gradient-cta: linear-gradient(135deg, #0F172A 0%, #1E3A8A 50%, #0F172A 100%);
  --gradient-card: linear-gradient(180deg, rgba(37, 99, 235, 0.08) 0%, rgba(6, 182, 212, 0.04) 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --section-padding: 96px;
  --container-max: 1280px;
  --nav-height: 72px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--primary-dark);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 3.5rem;
  font-weight: 800;
}

h2 {
  font-size: 2.5rem;
  font-weight: 700;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
}

h4 {
  font-size: 1.125rem;
  font-weight: 600;
}

p {
  font-size: 1rem;
  color: var(--text-secondary);
}

.text-lg {
  font-size: 1.125rem;
}

.text-sm {
  font-size: 0.875rem;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section-dark {
  background-color: var(--primary-dark);
  color: var(--text-primary);
}

.section-darker {
  background-color: var(--surface-dark);
  color: var(--text-primary);
}

.section-light {
  background-color: var(--surface-light);
  color: var(--text-dark);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.125rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-blue);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-blue-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-dark);
}

.btn-outline:hover {
  border-color: var(--primary-blue);
  color: var(--primary-blue-light);
  transform: translateY(-2px);
}

.btn-white {
  background: #fff;
  color: var(--primary-dark);
}

.btn-white:hover {
  background: var(--surface-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 255, 255, 0.15);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: all var(--transition-base);
  background: transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-dark);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo svg {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  letter-spacing: 0.01em;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-blue);
  transition: width var(--transition-base);
}

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

.nav-divider {
  width: 1px;
  height: 16px;
  background: var(--border-dark);
  flex-shrink: 0;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-nav-cta {
  padding: 8px 18px;
  font-size: 0.8125rem;
  border-radius: 6px;
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
}

.nav-mobile-toggle svg {
  width: 24px;
  height: 24px;
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-bg canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.4;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 64px;
}

.hero-content {
  flex: 1;
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.3);
  border-radius: 50px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--primary-blue-light);
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  margin-bottom: 24px;
  color: var(--text-primary);
}

.hero h1 span {
  display: block;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.6;
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 32px;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-brain-icon {
  width: 320px;
  height: 320px;
  position: relative;
}

.hero-brain-icon svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 0 40px rgba(6, 182, 212, 0.3));
}

/* Industry icons on left sidebar of hero */
.hero-industries {
  position: absolute;
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 32px;
  z-index: 2;
}

.hero-industries .industry-icon {
  width: 40px;
  height: 40px;
  opacity: 0.5;
  color: var(--text-secondary);
  position: relative;
}

.hero-industries .industry-icon::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -20px;
  width: 1px;
  height: 16px;
  background: var(--border-dark);
}

.hero-industries .industry-icon:last-child::after {
  display: none;
}

/* --- Problem / Challenge Section --- */
.problem {
  background: var(--primary-dark);
  position: relative;
  overflow: hidden;
}

.problem::before {
  content: '';
  position: absolute;
  top: -200px;
  left: -200px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.problem-content {
  display: flex;
  align-items: center;
  gap: 80px;
}

.problem-visual {
  flex: 0 0 400px;
  display: flex;
  justify-content: center;
}

.problem-donut {
  position: relative;
  width: 300px;
  height: 300px;
}

.problem-donut svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
  filter: drop-shadow(0 0 30px rgba(6, 182, 212, 0.3));
}

.problem-donut .donut-animated {
  stroke-dasharray: 691;
  stroke-dashoffset: 691;
  animation: donut-fill 2s ease-out forwards;
  animation-play-state: paused;
}

.problem-donut.visible .donut-animated {
  animation-play-state: running;
}

@keyframes donut-fill {
  to { stroke-dashoffset: 69; }
}

.problem-donut-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.problem-donut-label .number {
  font-size: 4.5rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  font-family: var(--font-mono);
}

.problem-donut-label .sub-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  margin-top: 4px;
}

.problem-text {
  flex: 1;
}

.problem-text h2 {
  color: var(--text-primary);
  margin-bottom: 24px;
}

.problem-quote {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  font-style: italic;
  border-left: 3px solid var(--accent-cyan);
  padding-left: 20px;
}

.problem-source {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  opacity: 0.7;
}

.problem-source a {
  color: var(--accent-cyan);
  transition: color var(--transition-fast);
}

.problem-source a:hover {
  color: var(--primary-blue-light);
}

/* --- Barriers Section --- */
.barriers {
  background: var(--surface-dark);
}

.barriers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.barrier-card {
  background: var(--primary-dark);
  border: 1px solid var(--border-dark);
  border-radius: 16px;
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.barrier-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.barrier-card:hover {
  border-color: rgba(37, 99, 235, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.barrier-card:hover::before {
  opacity: 1;
}

.barrier-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 24px;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.barrier-icon svg {
  width: 28px;
  height: 28px;
  color: var(--primary-blue-light);
}

.barrier-card h3 {
  margin-bottom: 12px;
  color: var(--text-primary);
  font-size: 1.25rem;
}

.barrier-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Solution Section --- */

.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.solution-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: 16px;
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition-base);
}

.solution-card:hover {
  border-color: var(--primary-blue);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.08);
}

.solution-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  background: rgba(37, 99, 235, 0.06);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.solution-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary-blue);
}

.solution-card h3 {
  margin-bottom: 12px;
  color: var(--text-dark);
}

.solution-card p {
  font-size: 0.9375rem;
  color: var(--text-dark-secondary);
  line-height: 1.6;
}

/* Solution cards in dark sections */
.section-dark .solution-card {
  background: var(--surface-dark);
  border-color: var(--border-dark);
}

.section-dark .solution-card:hover {
  border-color: var(--primary-blue);
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.1);
}

.section-dark .solution-card h3 {
  color: var(--text-primary);
}

.section-dark .solution-card p {
  color: var(--text-secondary);
}

/* --- Use Case Sections --- */
.use-case {
  position: relative;
  overflow: hidden;
}

.use-case-semiconductor {
  background: linear-gradient(135deg, #0F172A 0%, #0A0A0A 100%);
}

.use-case-datacenter {
  background: linear-gradient(135deg, #0A0A0A 0%, #0F172A 100%);
}

.use-case-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.use-case-text h2 {
  margin-bottom: 8px;
}

.use-case-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 16px;
}

.use-case-text p {
  font-size: 1.0625rem;
  line-height: 1.7;
  margin-bottom: 32px;
}

.use-case-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.metric-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-dark);
  border-radius: 12px;
  padding: 20px;
}

.metric-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.use-case-video {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-dark);
  background: var(--surface-dark);
  aspect-ratio: 16 / 9;
}

.use-case-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--surface-dark) 0%, var(--surface-dark-alt) 100%);
  position: relative;
}

.video-placeholder-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.15);
  border: 2px solid rgba(37, 99, 235, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: all var(--transition-base);
}

.video-placeholder:hover .video-placeholder-icon {
  background: rgba(37, 99, 235, 0.25);
  transform: scale(1.05);
}

.video-placeholder-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary-blue-light);
  margin-left: 4px;
}

.video-placeholder-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Decorative glow for use case sections */
.use-case-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(150px);
  opacity: 0.15;
  pointer-events: none;
}

.use-case-semiconductor .use-case-glow {
  background: var(--accent-cyan);
  top: -200px;
  right: -200px;
}

.use-case-datacenter .use-case-glow {
  background: var(--accent-green);
  bottom: -200px;
  left: -200px;
}

/* --- Market Section --- */
.market {
  background: var(--primary-dark);
}

.market-total {
  text-align: center;
  margin-bottom: 48px;
}

.market-total .big-number {
  font-size: 4rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.market-total .label {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.market-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.market-card {
  background: var(--surface-dark);
  border: 1px solid var(--border-dark);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.market-card:hover {
  border-color: var(--primary-blue);
  transform: translateY(-4px);
}

.market-card-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.market-card-icon svg {
  width: 32px;
  height: 32px;
}

.market-card h3 {
  font-size: 1.125rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.market-card .market-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.market-card .market-year {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.market-card .market-cagr {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  background: rgba(16, 185, 129, 0.1);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent-green);
}

.market-bar {
  width: 100%;
  height: 4px;
  background: var(--border-dark);
  border-radius: 2px;
  margin-top: 20px;
  overflow: hidden;
}

.market-bar-fill {
  height: 100%;
  border-radius: 2px;
  background: var(--gradient-blue);
  width: 0;
  transition: width 1.5s ease-out;
}

.market-applications {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: 16px;
  text-align: left;
}

/* --- Competitive Section --- */
.competitive {
  background: var(--surface-dark);
}

.competitive-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 48px;
}

.competitive-block {
  padding: 40px;
  border-radius: 16px;
}

.competitive-landscape {
  background: var(--primary-dark);
  border: 1px solid var(--border-dark);
}

.competitive-approach {
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.2);
}

.competitive-block h3 {
  margin-bottom: 24px;
  font-size: 1.25rem;
}

.competitive-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.competitive-item:last-child {
  margin-bottom: 0;
}

.competitive-item-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.competitive-landscape .competitive-item-icon {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-amber);
}

.competitive-approach .competitive-item-icon {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-green);
}

.competitive-item-icon svg {
  width: 20px;
  height: 20px;
}

.competitive-item h4 {
  color: var(--text-primary);
  margin-bottom: 4px;
}

.competitive-item p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Approach comparison table */
.approach-table {
  margin-top: 48px;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--border-dark);
}

.approach-table table {
  width: 100%;
  border-collapse: collapse;
}

.approach-table th,
.approach-table td {
  padding: 16px 24px;
  text-align: left;
  font-size: 0.9375rem;
}

.approach-table thead {
  background: var(--primary-dark);
}

.approach-table th {
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-dark);
}

.approach-table td {
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-dark);
}

.approach-table tbody tr:last-child td {
  border-bottom: none;
}

.approach-table .highlight {
  color: var(--accent-green);
  font-weight: 600;
}

.approach-table .dim {
  color: var(--text-secondary);
  opacity: 0.6;
}

.approach-tagline {
  text-align: center;
  margin-top: 32px;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

/* --- Roadmap Section --- */
.roadmap {
  background: var(--primary-dark);
}

.roadmap-timeline {
  position: relative;
  margin-top: 48px;
  padding-left: 40px;
}

.roadmap-timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-dark);
}

.roadmap-item {
  position: relative;
  margin-bottom: 48px;
  padding-left: 40px;
}

.roadmap-item:last-child {
  margin-bottom: 0;
}

.roadmap-dot {
  position: absolute;
  left: -33px;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary-dark);
  border: 3px solid var(--primary-blue);
}

.roadmap-item.active .roadmap-dot {
  background: var(--primary-blue);
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.4);
}

.roadmap-item.launch .roadmap-dot {
  border-color: var(--accent-green);
  background: var(--accent-green);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
}

.roadmap-quarter {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary-blue-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.roadmap-item h3 {
  margin-bottom: 8px;
}

.roadmap-item p {
  font-size: 0.9375rem;
}

.roadmap-tasks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.roadmap-tag {
  display: inline-flex;
  padding: 4px 12px;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* --- Contact Section --- */
.contact {
  background: var(--gradient-cta);
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(6, 182, 212, 0.06) 0%, transparent 50%);
}

.contact .container {
  position: relative;
  z-index: 1;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-info h2 {
  margin-bottom: 16px;
}

.contact-info > p {
  font-size: 1.125rem;
  margin-bottom: 40px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-detail {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-detail-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(37, 99, 235, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-detail-icon svg {
  width: 20px;
  height: 20px;
  color: var(--primary-blue-light);
}

.contact-detail h4 {
  color: var(--text-primary);
  margin-bottom: 2px;
}

.contact-detail p {
  font-size: 0.875rem;
}

.contact-form {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-dark);
  border-radius: 16px;
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-dark);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.5;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary-blue);
}

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

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23A1A1AA' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  cursor: pointer;
}

.form-group select option {
  background: var(--surface-dark);
  color: var(--text-primary);
}

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

.contact-form .btn {
  width: 100%;
  justify-content: center;
  padding: 16px;
}

.form-note {
  text-align: center;
  margin-top: 12px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  opacity: 0.6;
}

/* --- Footer --- */
.footer {
  background: var(--primary-dark);
  border-top: 1px solid var(--border-dark);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 700;
}

.footer-logo svg {
  width: 28px;
  height: 28px;
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-location {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  opacity: 0.6;
}

/* Legacy footer-links support */
.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

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

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

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

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-legal a:hover {
  color: var(--text-primary);
}

/* --- Scroll Animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }
.fade-up-delay-4 { transition-delay: 0.4s; }

/* --- Counter Animation --- */
.counter {
  font-variant-numeric: tabular-nums;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  :root {
    --section-padding: 72px;
  }

  h1 { font-size: 2.75rem; }
  h2 { font-size: 2rem; }

  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-visual {
    display: none;
  }

  .hero-industries {
    display: none;
  }

  .problem-content {
    flex-direction: column;
    gap: 48px;
  }

  .problem-visual {
    flex: auto;
  }

  .use-case-content {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .market-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .competitive-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 56px;
    --nav-height: 64px;
  }

  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.25rem; }

  .nav-links {
    display: none;
  }

  .nav-cta .btn-outline {
    display: none;
  }

  .nav-mobile-toggle {
    display: block;
  }

  /* Mobile menu */
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-dark);
  }

  .barriers-grid,
  .solution-grid {
    grid-template-columns: 1fr;
  }

  .market-grid {
    grid-template-columns: 1fr;
  }

  .market-total .big-number {
    font-size: 3rem;
  }

  .use-case-metrics {
    grid-template-columns: 1fr;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-content {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .approach-table {
    overflow-x: auto;
  }

  .approach-table table {
    min-width: 600px;
  }

  .hero-subtitle {
    font-size: 1.0625rem;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.5rem; }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .container {
    padding: 0 16px;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .btn {
    padding: 12px 20px;
    font-size: 0.875rem;
  }

  .contact-form {
    padding: 24px;
  }
}