/* ============================================================
   DEFENSE & GOVERNMENT MICROSITE STYLES
   Slug: industries/defense-government
   Brand: Levron Aerogel
   ============================================================ */

:root {
  /* Defense-specific palette */
  --def-bg: #0B0D0F;             /* Graphite Black */
  --def-surface: #14171A;        /* Deep Charcoal */
  --def-surface-alt: #1B1E22;
  --def-surface-hover: #212529;
  
  --def-border: #2B3036;
  --def-border-light: #3D444C;
  
  --def-text: #E1E8F0;           /* Silica Whiteish */
  --def-text-muted: #8D96A0;     /* Matte Steel Gray */
  --def-text-dark: #66707A;
  
  --def-accent: #E8652D;         /* Amber Heat */
  --def-accent-hover: #fa7b44;
  --def-accent-glow: rgba(232, 101, 45, 0.2);
  
  --def-titanium: #D0D7E0;       /* Muted Titanium */
  --def-olive: #7D8A7C;          /* Olive Gray */
  --def-blue-gray: #4A5D6B;      /* Cool Blue-Gray Technical */
  --def-blue-glow: rgba(74, 93, 107, 0.3);
  
  --def-font: 'Inter', system-ui, -apple-system, sans-serif;
  --def-nav-height: 60px;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--def-bg);
  color: var(--def-text);
  font-family: var(--def-font);
}

/* ============================================================
   1. HERO SECTION
   ============================================================ */
.def-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 160px 0 100px;
  overflow: hidden;
  background-color: var(--def-bg);
}

.def-hero__bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 1;
  pointer-events: none;
}

.def-hero__bg-grid {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(rgba(141, 150, 160, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(141, 150, 160, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  background-position: center top;
  z-index: 1;
  mask-image: radial-gradient(circle at center, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at center, black 20%, transparent 80%);
}

.def-hero__glow {
  position: absolute;
  top: 40%; left: 60%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--def-blue-glow) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  z-index: 0;
  filter: blur(80px);
}

.def-hero .container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 5%;
}

.def-hero__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.def-hero__content {
  max-width: 650px;
}

.def-breadcrumb {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--def-text-muted);
  font-weight: 500;
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}

.def-breadcrumb a {
  color: var(--def-text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.def-breadcrumb a:hover {
  color: var(--def-text);
}

.def-breadcrumb svg {
  width: 14px;
  height: 14px;
  opacity: 0.5;
}

.def-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background-color: var(--def-surface);
  border: 1px solid var(--def-border);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--def-text);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.def-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--def-accent);
  box-shadow: 0 0 8px var(--def-accent);
}

.def-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.1;
  font-weight: 700;
  color: var(--def-text);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.def-title em {
  font-style: normal;
  color: var(--def-titanium);
  background: linear-gradient(135deg, #fff 0%, var(--def-titanium) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.def-subtitle {
  font-size: 1.125rem;
  color: var(--def-text-muted);
  line-height: 1.6;
  margin-bottom: 40px;
  max-width: 580px;
}

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

.def-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.03em;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
}

.def-btn--primary {
  background-color: var(--def-accent);
  color: #fff;
  border: 1px solid var(--def-accent);
  box-shadow: 0 4px 16px var(--def-accent-glow);
}

.def-btn--primary:hover {
  background-color: var(--def-accent-hover);
  border-color: var(--def-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--def-accent-glow);
}

.def-btn--secondary {
  background-color: var(--def-surface);
  color: var(--def-text);
  border: 1px solid var(--def-border);
}

.def-btn--secondary:hover {
  background-color: var(--def-surface-hover);
  border-color: var(--def-border-light);
  transform: translateY(-2px);
}

/* Micro-summary strip */
.def-hero__strip {
  margin-top: 80px;
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 24px 32px;
  background-color: rgba(20, 23, 26, 0.6);
  border: 1px solid var(--def-border);
  border-radius: 8px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  flex-wrap: wrap;
}

.def-hero__strip-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.def-hero__strip-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--def-text);
  font-family: monospace;
  letter-spacing: -0.03em;
}

.def-hero__strip-label {
  font-size: 0.75rem;
  color: var(--def-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.def-hero__strip-div {
  width: 1px;
  height: 40px;
  background-color: var(--def-border);
}

/* Hero Visual: System Cutaway */
.def-hero__visual {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
}

.def-sys {
  position: relative;
  width: 100%;
  max-width: 500px;
  height: 600px;
  transform-style: preserve-3d;
  transform: rotateX(15deg) rotateY(-20deg);
}

.def-sys-layer {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 320px;
  height: 400px;
  border-radius: 12px;
  border: 2px solid;
  transition: transform 0.5s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  overflow: hidden;
}

.def-sys-layer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 20px 20px;
  background-position: center;
}

.def-sys-env {
  border-color: var(--def-accent);
  background-color: rgba(232, 101, 45, 0.05);
  box-shadow: 0 0 40px rgba(232, 101, 45, 0.1);
  transform: translate(-50%, -50%) translateZ(120px);
}

.def-sys-env span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.def-sys-env span::before {
  content: '';
  display: inline-block;
  width: 8px; height: 8px;
  background-color: var(--def-accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--def-accent);
}

.def-sys-barrier {
  border-color: var(--def-blue-gray);
  background-color: rgba(74, 93, 107, 0.8);
  box-shadow: 0 0 60px rgba(74, 93, 107, 0.4);
  transform: translate(-50%, -50%) translateZ(0px);
  color: #fff;
  border: 2px solid var(--def-titanium);
}

.def-sys-barrier-grain {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  opacity: 0.2;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.def-sys-component {
  border-color: var(--def-olive);
  background-color: rgba(125, 138, 124, 0.1);
  box-shadow: inset 0 0 20px rgba(125, 138, 124, 0.2);
  transform: translate(-50%, -50%) translateZ(-120px);
}

.def-sys-component-ic {
  width: 60px; height: 60px;
  border: 2px solid var(--def-olive);
  border-radius: 8px;
  margin-bottom: 16px;
  display: grid;
  place-items: center;
  position: relative;
  z-index: 2;
}

.def-sys-lines {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  z-index: 0;
}

.def-sys-line {
  position: absolute;
  background: linear-gradient(90deg, rgba(232,101,45,0.8), transparent);
  height: 2px;
  right: 50%; /* from env towards barrier */
  animation: heatFlow 2s infinite linear;
}

.def-sys-line:nth-child(1) { top: 20%; width: 150px; }
.def-sys-line:nth-child(2) { top: 50%; width: 250px; animation-delay: 0.5s; }
.def-sys-line:nth-child(3) { top: 80%; width: 180px; animation-delay: 1.2s; }

@keyframes heatFlow {
  0% { transform: translateX(50px); opacity: 0; }
  50% { opacity: 1; }
  100% { transform: translateX(0px); opacity: 0; } /* Stopps at barrier */
}

/* ============================================================
   2. STICKY NAV
   ============================================================ */
.def-nav {
  position: sticky;
  top: 60px; /* Accounts for main header */
  z-index: 90;
  background: rgba(11, 13, 15, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--def-border);
  border-top: 1px solid var(--def-border);
  padding: 0 5%;
}

.def-nav__inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  overflow-x: auto;
  padding: 12px 0;
  scrollbar-width: none;
}
.def-nav__inner::-webkit-scrollbar { display: none; }

.def-nav__link {
  color: var(--def-text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 16px;
  white-space: nowrap;
  transition: color 0.2s, background-color 0.2s;
  border-radius: 4px;
}

.def-nav__link:hover, .def-nav__link.active {
  color: var(--def-text);
  background-color: var(--def-surface);
}

.def-nav__cta {
  margin-left: auto;
  padding-left: 16px;
}
.def-nav__cta .def-btn {
  padding: 8px 20px;
  font-size: 0.85rem;
}

/* ============================================================
   GLOBALS FOR SECTIONS
   ============================================================ */
.section {
  padding: 120px 0;
  position: relative;
}

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

.section--dark {
  background-color: var(--def-surface);
  border-top: 1px solid var(--def-border);
  border-bottom: 1px solid var(--def-border);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--def-blue-gray);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-label::before {
  content: '';
  display: block;
  width: 24px; height: 2px;
  background-color: var(--def-blue-gray);
}

.heading-lg {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--def-text);
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.text-lg {
  font-size: 1.125rem;
  color: var(--def-text-muted);
  line-height: 1.7;
  max-width: 800px;
}

.section-header--center {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.section-header--center .section-label::before { display: none; }
.section-header--center .text-lg { margin: 0 auto; }

/* Reveal Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.2, 0, 0, 1);
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================================
   3. MISSION CHALLENGES
   ============================================================ */
.def-challenges__map {
  margin-top: 60px;
  background: var(--def-surface);
  border: 1px solid var(--def-border);
  border-radius: 12px;
  padding: 40px;
  position: relative;
  overflow: hidden;
}

.def-challenge-diagram {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.def-cd__header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: center;
}

.def-cd__title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--def-text);
}

.def-cd__subtitle {
  color: var(--def-text-muted);
  font-size: 1rem;
}

.def-cd__constraints {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 20px;
}

.def-cd__constraint {
  flex: 1;
  background: var(--def-bg);
  border: 1px solid var(--def-border);
  padding: 24px;
  border-radius: 8px;
  text-align: center;
  position: relative;
  transition: border-color 0.3s;
}

.def-cd__constraint:hover {
  border-color: var(--def-blue-gray);
}

.def-cd__constraint-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  background: var(--def-surface-hover);
  border-radius: 50%;
  color: var(--def-titanium);
}

.def-cd__constraint-icon svg {
  width: 24px; height: 24px;
}

.def-cd__constraint-label {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--def-text);
  margin-bottom: 12px;
  line-height: 1.3;
}

.def-cd__constraint-detail {
  font-size: 0.85rem;
  color: var(--def-text-muted);
  line-height: 1.5;
}

.def-cd__connector {
  width: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.def-cd__connector::before {
  content: '+';
  font-size: 1.5rem;
  color: var(--def-border-light);
  font-weight: 700;
}

.def-cd__conclusion {
  background: rgba(74, 93, 107, 0.1);
  border: 1px solid rgba(74, 93, 107, 0.3);
  padding: 20px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--def-text);
  font-size: 1.05rem;
  line-height: 1.6;
}

.def-cd__conclusion strong {
  color: var(--def-titanium);
}

.def-cd__conclusion svg {
  width: 32px; height: 32px;
  flex-shrink: 0;
  color: var(--def-blue-gray);
}

.def-challenges__cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 60px;
}

.def-challenges__card {
  padding: 30px;
  border-left: 2px solid var(--def-border);
  transition: border-color 0.3s;
}

.def-challenges__card:hover {
  border-color: var(--def-olive);
}

.def-challenges__card-num {
  font-family: monospace;
  font-size: 1rem;
  color: var(--def-blue-gray);
  margin-bottom: 16px;
  font-weight: 700;
}

.def-challenges__card h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--def-text);
  margin-bottom: 12px;
  line-height: 1.4;
}

.def-challenges__card p {
  font-size: 0.95rem;
  color: var(--def-text-muted);
  line-height: 1.6;
}

/* ============================================================
   4. WHY LIGHTWEIGHT MATTERS
   ============================================================ */
.def-thin__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.def-thin__points {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.def-thin__point {
  display: flex;
  gap: 20px;
}

.def-thin__point-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  background: var(--def-surface);
  border: 1px solid var(--def-border);
  display: grid;
  place-items: center;
  color: var(--def-text);
  flex-shrink: 0;
}
.def-thin__point-icon svg { width: 20px; height: 20px; }

.def-thin__point h5 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--def-text);
}

.def-thin__point p {
  font-size: 0.95rem;
  color: var(--def-text-muted);
  line-height: 1.6;
}

.def-thin__visual {
  background: var(--def-surface);
  border: 1px solid var(--def-border);
  border-radius: 12px;
  padding: 40px;
}

.def-thin__comparison-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.def-thin__comparison-header {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--def-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.def-thin__bar-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.def-thin__bar-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--def-text);
}

.def-thin__bar {
  height: 32px;
  border-radius: 4px;
  background: var(--def-border-light);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 12px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
}

.def-thin__bar--conventional { background: var(--def-border-light); }
.def-thin__bar--standard { background: var(--def-olive); }
.def-thin__bar--levron { background: var(--def-blue-gray); }

.def-thin__bar-note {
  font-size: 0.8rem;
  color: var(--def-text-muted);
  margin-top: 8px;
  font-style: italic;
}

.def-thin__savings {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--def-border);
}

.def-thin__saving {
  text-align: center;
}

.def-thin__saving-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--def-titanium);
  margin-bottom: 4px;
}

.def-thin__saving-label {
  font-size: 0.75rem;
  color: var(--def-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* ============================================================
   5. MATERIAL STRATEGY
   ============================================================ */
.def-strategy__diagram {
  margin-top: 60px;
  position: relative;
}

.def-strategy__layers {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 900px;
  margin: 0 auto;
}

.def-strategy__layer {
  background: var(--def-bg);
  border: 1px solid var(--def-border);
  border-radius: 8px;
  padding: 32px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 32px;
  align-items: center;
  position: relative;
  z-index: 2;
  transition: border-color 0.3s;
}

.def-strategy__layer:hover {
  border-color: var(--def-blue-gray);
}

.def-strategy__layer-zone {
  font-family: monospace;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--def-blue-gray);
  width: 80px;
  text-align: center;
  padding-right: 32px;
  border-right: 1px solid var(--def-border);
}

.def-strategy__layer-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.def-strategy__layer-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--def-text);
}

.def-strategy__layer-desc {
  font-size: 0.95rem;
  color: var(--def-text-muted);
  line-height: 1.6;
}

.def-strategy__layer-spec {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--def-text);
  font-weight: 600;
  text-align: right;
  padding-left: 32px;
  border-left: 1px solid var(--def-border);
}
.def-strategy__layer-spec span {
  color: var(--def-titanium);
}

.def-strategy__layer-connector {
  height: 24px;
  width: 2px;
  background: var(--def-border-light);
  margin: 0 auto;
}

.def-strategy__values {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.def-strategy__value {
  padding: 24px;
  background: var(--def-bg);
  border: 1px solid var(--def-border);
  border-radius: 8px;
}

.def-strategy__value-num {
  font-family: monospace;
  font-size: 1.1rem;
  color: var(--def-blue-gray);
  margin-bottom: 16px;
  font-weight: 700;
}

.def-strategy__value h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--def-text);
  margin-bottom: 12px;
  line-height: 1.4;
}

.def-strategy__value p {
  font-size: 0.9rem;
  color: var(--def-text-muted);
  line-height: 1.6;
}

/* ============================================================
   6. APPLICATION CONCEPTS (GRID OF TILES)
   ============================================================ */
.def-concepts__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 60px;
}

.def-concept-card {
  position: relative;
  border-radius: 12px;
  border: 1px solid var(--def-border);
  overflow: hidden;
  background: var(--def-surface);
  transition: transform 0.3s, border-color 0.3s;
}

.def-concept-card:hover {
  transform: translateY(-5px);
  border-color: var(--def-blue-gray);
}

.def-concept-card__img {
  width: 100%;
  height: 200px;
  background: var(--def-bg);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--def-border);
  overflow: hidden;
}

.def-concept-card__icon {
  width: 48px; height: 48px;
  color: var(--def-titanium);
  z-index: 2;
}

.def-concept-card__img::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: linear-gradient(45deg, rgba(83, 104, 120, 0.1) 25%, transparent 25%, transparent 50%, rgba(83, 104, 120, 0.1) 50%, rgba(83, 104, 120, 0.1) 75%, transparent 75%, transparent);
  background-size: 20px 20px;
  z-index: 1;
}

.def-concept-card__body {
  padding: 30px;
}

.def-concept-card__body h4 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--def-text);
  margin-bottom: 12px;
}

.def-concept-card__body p {
  font-size: 0.95rem;
  color: var(--def-text-muted);
  line-height: 1.6;
}

/* ============================================================
   7. PRODUCT FIT
   ============================================================ */
.def-products__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-top: 60px;
}

.def-products__card {
  background: var(--def-surface);
  border: 1px solid var(--def-border);
  border-radius: 12px;
  padding: 40px;
  transition: transform 0.3s, border-color 0.3s;
  display: flex;
  flex-direction: column;
}

.def-products__card:hover {
  transform: translateY(-5px);
  border-color: var(--def-olive);
}

.def-products__card-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--def-blue-gray);
  margin-bottom: 24px;
}

.def-products__card-icon {
  width: 48px; height: 48px;
  color: var(--def-text);
  margin-bottom: 24px;
}

.def-products__card h4 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--def-text);
  margin-bottom: 16px;
}

.def-products__card p {
  font-size: 1rem;
  color: var(--def-text-muted);
  line-height: 1.6;
  margin-bottom: 32px;
  flex-grow: 1;
}

.def-products__card-specs {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--def-border);
}

.def-products__card-specs span {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--def-text);
  font-weight: 500;
}

.def-products__card-specs span::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background-color: var(--def-olive);
}

.def-products__card-link {
  color: var(--def-titanium);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s;
}

.def-products__card-link:hover {
  color: #fff;
}

/* ============================================================
   8. PERFORMANCE HIGHLIGHTS
   ============================================================ */
.def-perf__hero-metric {
  background: var(--def-bg);
  border: 1px solid var(--def-border);
  border-radius: 12px;
  padding: 60px;
  margin-top: 60px;
  display: flex;
  gap: 60px;
  align-items: center;
}

.def-perf__hero-left {
  flex: 2;
}

.def-perf__hero-right {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-left: 40px;
  border-left: 1px solid var(--def-border);
}

.def-perf__hero-eyebrow {
  font-size: 0.85rem;
  color: var(--def-blue-gray);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.def-perf__hero-value {
  font-size: 4rem;
  font-weight: 800;
  color: var(--def-text);
  line-height: 1;
  font-family: monospace;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.def-perf__hero-unit {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--def-titanium);
  margin-bottom: 24px;
}

.def-perf__hero-desc {
  font-size: 1rem;
  color: var(--def-text-muted);
  line-height: 1.6;
}

.def-perf__hero-detail {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--def-text);
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.def-perf__hero-detail::before {
  content: '→';
  color: var(--def-blue-gray);
}

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

.def-perf__card {
  background: var(--def-bg);
  border: 1px solid var(--def-border);
  border-radius: 12px;
  padding: 30px;
  display: flex;
  flex-direction: column;
}

.def-perf__card-eyebrow {
  font-size: 0.75rem;
  color: var(--def-text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.def-perf__card-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--def-text);
  font-family: monospace;
  line-height: 1.1;
  margin-bottom: 4px;
}
.def-perf__card-value span { font-size: 1.2rem; color: var(--def-text-muted); }

.def-perf__card-unit {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--def-titanium);
  margin-bottom: 16px;
}

.def-perf__card-desc {
  font-size: 0.9rem;
  color: var(--def-text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

.def-perf__card-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--def-blue-gray);
  background: rgba(74, 93, 107, 0.1);
  padding: 6px 12px;
  border-radius: 4px;
  align-self: flex-start;
}

/* ============================================================
   9. COMPARISON
   ============================================================ */
.def-compare__table-wrap {
  margin-top: 60px;
  overflow-x: auto;
  background: var(--def-surface);
  border: 1px solid var(--def-border);
  border-radius: 12px;
}

.def-compare__table {
  width: 100%;
  border-collapse: collapse;
  min-width: 800px;
}

.def-compare__table th,
.def-compare__table td {
  padding: 24px;
  text-align: left;
  border-bottom: 1px solid var(--def-border);
}

.def-compare__table th {
  background: var(--def-bg);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--def-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.def-compare__table th:first-child { width: 30%; }

.def-compare__table td {
  font-size: 0.95rem;
  color: var(--def-text);
  vertical-align: top;
}

.def-compare__table tr:last-child td {
  border-bottom: none;
}

.def-compare__feature {
  font-weight: 700;
  color: var(--def-text);
  display: block;
  margin-bottom: 4px;
}

.def-compare__desc {
  font-size: 0.85rem;
  color: var(--def-text-muted);
  line-height: 1.4;
}

.def-compare__aerogel {
  background: rgba(74, 93, 107, 0.05);
  font-weight: 600;
  color: #fff !important;
  border-left: 2px solid var(--def-blue-gray);
}
.def-compare__table th.def-compare__aerogel { color: var(--def-titanium) !important; }

.def-icon-check {
  color: var(--def-olive);
  display: inline-block;
  margin-right: 8px;
  font-weight: bold;
}

.def-icon-cross {
  color: var(--def-border-light);
  display: inline-block;
  margin-right: 8px;
}

/* ============================================================
   10. SCIENCE TO VALUE
   ============================================================ */
.def-sv__flow {
  display: flex;
  align-items: stretch;
  gap: 20px;
  margin-top: 60px;
}

.def-sv__col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.def-sv__header {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--def-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--def-border);
  margin-bottom: 20px;
}

.def-sv__card {
  background: var(--def-surface);
  border: 1px solid var(--def-border);
  padding: 24px;
  border-radius: 8px;
  height: 100%;
}

.def-sv__card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--def-text);
  margin-bottom: 8px;
}

.def-sv__card p {
  font-size: 0.9rem;
  color: var(--def-text-muted);
  line-height: 1.5;
}

.def-sv__bridge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-top: 54px;
  color: var(--def-border-light);
}

.def-sv__bridge svg {
  width: 24px; height: 24px;
  margin: 10px 0;
}

/* ============================================================
   11. COLLABORATION MODEL
   ============================================================ */
.def-collab__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 60px;
  position: relative;
}

.def-collab__steps::before {
  content: '';
  position: absolute;
  top: 24px;
  left: 50px;
  right: 50px;
  height: 2px;
  background: var(--def-border);
  z-index: 0;
}

.def-collab__step {
  position: relative;
  z-index: 1;
}

.def-collab__num {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--def-bg);
  border: 2px solid var(--def-blue-gray);
  color: var(--def-text);
  font-weight: 700;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: 0 0 0 8px var(--def-surface);
}

.def-collab__step h4 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--def-text);
  margin-bottom: 12px;
}

.def-collab__step p {
  font-size: 0.95rem;
  color: var(--def-text-muted);
  line-height: 1.5;
}

/* ============================================================
   12. WHY LEVRON AEROGEL
   ============================================================ */
.def-why__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.def-why__stat {
  text-align: center;
  padding: 40px 20px;
  background: var(--def-bg);
  border: 1px solid var(--def-border);
  border-radius: 8px;
}

.def-why__stat-val {
  font-size: 3rem;
  font-weight: 800;
  color: var(--def-titanium);
  margin-bottom: 8px;
  font-family: monospace;
}

.def-why__stat-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--def-text-muted);
  line-height: 1.4;
}

/* ============================================================
   13. RESOURCE HUB
   ============================================================ */
.def-hub__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.def-hub__card {
  display: flex;
  align-items: center;
  padding: 24px;
  background: var(--def-surface);
  border: 1px solid var(--def-border);
  border-radius: 8px;
  transition: background-color 0.3s;
  text-decoration: none;
  color: inherit;
}

.def-hub__card:hover {
  background: var(--def-surface-hover);
}

.def-hub__icon {
  width: 48px; height: 48px;
  background: var(--def-bg);
  border: 1px solid var(--def-border);
  border-radius: 8px;
  display: grid;
  place-items: center;
  margin-right: 20px;
  color: var(--def-titanium);
}
.def-hub__icon svg { width: 24px; height: 24px; }

.def-hub__content h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--def-text);
  margin-bottom: 4px;
}

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

/* ============================================================
   14. FINAL CTA
   ============================================================ */
.def-cta {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--def-surface) 0%, var(--def-bg) 100%);
  text-align: center;
}

.def-cta__title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--def-text);
  margin-bottom: 24px;
}

.def-cta__desc {
  font-size: 1.1rem;
  color: var(--def-text-muted);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.def-cta__actions {
  display: flex;
  justify-content: center;
  gap: 20px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .def-hero__layout,
  .def-thin__layout,
  .def-products__grid,
  .def-hub__grid {
    grid-template-columns: 1fr;
  }
  
  .def-sys {
    transform: scale(0.8) rotateX(15deg) rotateY(-20deg);
  }

  .def-sv__flow {
    flex-direction: column;
  }
  .def-sv__bridge {
    flex-direction: row;
    padding-top: 0;
  }
  .def-sv__bridge svg { transform: rotate(-90deg); }

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

@media (max-width: 768px) {
  .def-hero {
    padding-top: 120px;
  }
  
  .def-hero__strip {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .def-hero__strip-div {
    width: 100%;
    height: 1px;
  }
  
  .def-cd__constraints {
    flex-direction: column;
  }
  .def-cd__connector {
    width: 100%;
    height: 40px;
  }
  
  .def-strategy__layer {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .def-strategy__layer-zone {
    border-right: none;
    border-bottom: 1px solid var(--def-border);
    padding-right: 0;
    padding-bottom: 16px;
    margin: 0 auto;
  }
  .def-strategy__layer-spec {
    border-left: none;
    border-top: 1px solid var(--def-border);
    padding-left: 0;
    padding-top: 16px;
    text-align: center;
  }
  
  .def-concepts__grid {
    grid-template-columns: 1fr;
  }
  
  .def-perf__hero-metric {
    flex-direction: column;
    padding: 30px;
  }
  .def-perf__hero-right {
    padding-left: 0;
    border-left: none;
    border-top: 1px solid var(--def-border);
    padding-top: 24px;
    width: 100%;
  }
  
  .def-perf__grid {
    grid-template-columns: 1fr;
  }
  
  .def-collab__steps {
    grid-template-columns: 1fr;
  }
  .def-collab__steps::before {
    top: 0; bottom: 0;
    left: 24px;
    width: 2px;
    height: 100%;
  }
  .def-collab__step {
    padding-left: 64px;
  }
  .def-collab__num {
    position: absolute;
    left: 0; top: 0;
  }
  
  .def-why__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .def-cta__actions {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .def-why__grid {
    grid-template-columns: 1fr;
  }
}