/* ============================================================
   ENERGY STORAGE SYSTEMS — SOLUTIONS PAGE
   ESS / BESS Thermal Protection Platform
   Deep-Tech Industrial Design Language
   Palette: graphite black · deep steel · silica white · thermal amber · infrastructure blue-gray
   ============================================================ */

/* --- ESS Solutions Custom Properties --- */
:root {
  --ess-amber:        #F59E0B;
  --ess-amber-light:  #FCD34D;
  --ess-amber-dark:   #D97706;
  --ess-orange:       #EA580C;
  --ess-red:          #DC2626;
  --ess-steel:        #475569;
  --ess-steel-light:  #64748B;
  --ess-steel-dark:   #334155;
  --ess-blue-gray:    #1E293B;
  --ess-green:        #10B981;
  --ess-teal:         #0D9488;
  --ess-grid-green:   #059669;
  --ess-gradient:     linear-gradient(135deg, #1E293B 0%, #334155 100%);
  --ess-gradient-warm:linear-gradient(135deg, #EA580C 0%, #F59E0B 100%);
  --ess-gradient-amber:linear-gradient(135deg, #D97706 0%, #FCD34D 100%);
  --ess-card-bg:      rgba(30, 41, 59, 0.35);
  --ess-barrier-glow: 0 0 20px rgba(245,158,11,0.35);
}

/* ============================================================
   1. HERO
   ============================================================ */
.ess-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 80px;
  overflow: hidden;
  background-color: var(--bg-primary);
}

.ess-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.ess-hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(71, 85, 105, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(71, 85, 105, 0.06) 1px, transparent 1px);
  background-size: 64px 64px;
}

.ess-hero__heat-zone {
  position: absolute;
  top: 10%;
  left: -8%;
  width: 45%;
  height: 70%;
  background: radial-gradient(ellipse, rgba(234,88,12,0.07) 0%, transparent 70%);
  filter: blur(100px);
  animation: essPulse 12s ease-in-out infinite alternate;
}

.ess-hero__barrier-glow {
  position: absolute;
  top: 20%;
  left: 38%;
  width: 20%;
  height: 60%;
  background: radial-gradient(ellipse, rgba(245,158,11,0.06) 0%, transparent 70%);
  filter: blur(60px);
  animation: essPulse 9s ease-in-out infinite alternate-reverse;
}

.ess-hero__safe-zone {
  position: absolute;
  top: 15%;
  right: -5%;
  width: 40%;
  height: 65%;
  background: radial-gradient(ellipse, rgba(16,185,129,0.04) 0%, transparent 70%);
  filter: blur(100px);
  animation: essPulse 14s ease-in-out infinite alternate;
}

@keyframes essPulse {
  0%   { transform: scale(1) translate(0, 0); opacity: 0.7; }
  100% { transform: scale(1.12) translate(15px, -15px); opacity: 1; }
}

/* Floating particles */
.ess-hero__particles { position: absolute; inset: 0; pointer-events: none; }

.ess-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--ess-amber);
  border-radius: 50%;
  opacity: 0;
  animation: essParticle linear infinite;
}

.ess-particle:nth-child(1) { left: 10%; animation-duration: 8s; animation-delay: 0s; }
.ess-particle:nth-child(2) { left: 25%; animation-duration: 11s; animation-delay: 2s; }
.ess-particle:nth-child(3) { left: 42%; animation-duration: 9s; animation-delay: 4s; }
.ess-particle:nth-child(4) { left: 60%; animation-duration: 13s; animation-delay: 1s; }
.ess-particle:nth-child(5) { left: 75%; animation-duration: 7s; animation-delay: 3s; }
.ess-particle:nth-child(6) { left: 88%; animation-duration: 10s; animation-delay: 5s; }

@keyframes essParticle {
  0%   { bottom: 0; opacity: 0; }
  10%  { opacity: 0.7; }
  90%  { opacity: 0.5; }
  100% { bottom: 100%; opacity: 0; }
}

.ess-hero__layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.ess-hero__breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.ess-hero__breadcrumb a { color: var(--text-tertiary); transition: color var(--transition-fast); }
.ess-hero__breadcrumb a:hover { color: var(--ess-amber); }
.ess-hero__breadcrumb svg { width: 12px; height: 12px; }
.ess-hero__breadcrumb span { color: var(--ess-amber); }

.ess-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(71,85,105,0.12);
  border: 1px solid rgba(71,85,105,0.25);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 32px;
}

.ess-hero__tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ess-amber);
  animation: essDotBlink 2.5s ease-in-out infinite;
}

@keyframes essDotBlink {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px rgba(245,158,11,0.5); }
  50%       { opacity: 0.3; box-shadow: none; }
}

.ess-hero__title {
  font-size: clamp(2.4rem, 4.8vw, 3.75rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.07;
  letter-spacing: -0.035em;
  margin-bottom: 28px;
}

.ess-hero__title em {
  font-style: normal;
  background: var(--ess-gradient-warm);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ess-hero__subtitle {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 40px;
}

.ess-hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.ess-hero__trust {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.ess-hero__trust-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.ess-hero__trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-tertiary);
  white-space: nowrap;
}

.ess-hero__trust-item svg { width: 12px; height: 12px; color: var(--ess-amber); }

/* ---- HERO VISUAL: BESS Container Cutaway ---- */
.ess-hero__visual { position: relative; }

.ess-container-viz {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(71,85,105,0.3);
  border-radius: 20px;
  padding: 28px;
  backdrop-filter: blur(12px);
  box-shadow: 0 24px 64px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.03);
}

.ess-cv__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.ess-cv__label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.ess-cv__status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--ess-green);
}

.ess-cv__status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--ess-green);
  animation: essDotBlink 3s infinite;
}

/* Container outer shell */
.ess-cv__container {
  background: rgba(30,41,59,0.6);
  border: 1px solid rgba(71,85,105,0.4);
  border-radius: 8px;
  padding: 12px;
  position: relative;
}

.ess-cv__container-roof {
  height: 10px;
  background: linear-gradient(90deg, #1E293B, #334155, #1E293B);
  border-radius: 4px 4px 0 0;
  margin-bottom: 8px;
  border: 1px solid rgba(71,85,105,0.3);
}

.ess-cv__racks-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.ess-cv__rack {
  flex: 1;
  background: rgba(15,23,42,0.5);
  border: 1px solid rgba(71,85,105,0.25);
  border-radius: 4px;
  padding: 8px 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ess-cv__rack-label {
  font-family: var(--font-mono);
  font-size: 0.45rem;
  text-align: center;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.ess-cv__module {
  height: 18px;
  border-radius: 2px;
  background: rgba(71,85,105,0.2);
  border: 1px solid rgba(71,85,105,0.3);
  position: relative;
  overflow: hidden;
}

.ess-cv__module::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 4px, transparent 4px, transparent 8px);
}

.ess-cv__module--hot {
  background: rgba(234,88,12,0.2);
  border-color: rgba(234,88,12,0.5);
}

.ess-cv__module--hot::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(234,88,12,0.5) 0%, transparent 80%);
  animation: essModuleHeat 2s ease-in-out infinite alternate;
}

@keyframes essModuleHeat {
  0% { opacity: 0.6; transform: scale(0.9); }
  100% { opacity: 1; transform: scale(1.05); }
}

.ess-cv__module--warm {
  background: rgba(245,158,11,0.12);
  border-color: rgba(245,158,11,0.3);
}

.ess-cv__module--safe {
  background: rgba(16,185,129,0.07);
  border-color: rgba(16,185,129,0.2);
}

/* Thermal barrier strip between racks */
.ess-cv__barrier {
  width: 10px;
  flex-shrink: 0;
  background: var(--ess-gradient-warm);
  border-radius: 3px;
  position: relative;
  box-shadow: var(--ess-barrier-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: essBarrierGlow 3s ease-in-out infinite alternate;
}

@keyframes essBarrierGlow {
  0%   { box-shadow: 0 0 12px rgba(245,158,11,0.25); }
  100% { box-shadow: 0 0 24px rgba(245,158,11,0.55); }
}

.ess-cv__barrier-text {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-mono);
  font-size: 0.38rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.9);
  white-space: nowrap;
}

.ess-cv__container-base {
  height: 8px;
  background: linear-gradient(90deg, #1E293B, #334155, #1E293B);
  border-radius: 0 0 4px 4px;
  margin-top: 8px;
}

.ess-cv__thermal-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(234,88,12,0.08) 0%, transparent 35%, rgba(16,185,129,0.04) 100%);
  pointer-events: none;
  border-radius: 8px;
}

/* Temp callouts */
.ess-cv__callouts {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
}

.ess-cv__callout {
  text-align: center;
}

.ess-cv__callout-temp {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.1;
}

.ess-cv__callout-temp--hot { color: var(--ess-orange); }
.ess-cv__callout-temp--safe { color: var(--ess-green); }

.ess-cv__callout-label {
  font-size: 0.55rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

/* Stats strip */
.ess-hero__strip {
  display: flex;
  gap: 0;
  margin-top: 20px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: 10px;
  overflow: hidden;
}

.ess-hero__strip-item {
  flex: 1;
  text-align: center;
  padding: 14px 8px;
  border-right: 1px solid rgba(71,85,105,0.15);
}

.ess-hero__strip-item:last-child { border-right: none; }

.ess-hero__strip-val {
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.ess-hero__strip-key {
  font-size: 0.55rem;
  color: var(--text-muted);
  margin-top: 3px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* ============================================================
   2. STICKY SECTION NAV
   ============================================================ */
.ess-nav {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(10,12,16,0.93);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(71,85,105,0.15);
}

.ess-nav__inner {
  display: flex;
  align-items: center;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.ess-nav__inner::-webkit-scrollbar { display: none; }

.ess-nav__link {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 14px 13px;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  letter-spacing: 0.01em;
}

.ess-nav__link:hover { color: var(--text-secondary); }

.ess-nav__link.active {
  color: var(--ess-amber);
  border-bottom-color: var(--ess-amber);
}

.ess-nav__cta { margin-left: auto; padding: 8px 0; flex-shrink: 0; padding-left: 16px; }

/* ============================================================
   3. THE RISK — SECTION
   ============================================================ */
.ess-risk__intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
  margin-bottom: 64px;
}

.ess-risk__stat-block {
  padding: 32px;
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
}

.ess-risk__stat-number {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 800;
  color: var(--ess-orange);
  line-height: 1;
  margin-bottom: 8px;
}

.ess-risk__stat-label {
  font-size: 0.9375rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.ess-risk__stat-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Propagation Flow Diagram */
.ess-risk__flow-diagram {
  background: var(--bg-tertiary);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  padding: 40px;
  margin-bottom: 48px;
}

.ess-risk__flow-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.ess-risk__flow-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

.ess-risk__flow-steps {
  display: flex;
  align-items: center;
  gap: 0;
}

.ess-flow-step {
  flex: 1;
  padding: 20px 16px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-md);
  position: relative;
  text-align: center;
  transition: all var(--transition-base);
}

.ess-flow-step:hover { border-color: rgba(245,158,11,0.25); }

.ess-flow-step__num {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 0.1em;
}

.ess-flow-step__icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  margin: 0 auto 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ess-flow-step__icon--1 { background: rgba(71,85,105,0.2); color: var(--ess-steel-light); }
.ess-flow-step__icon--2 { background: rgba(245,158,11,0.12); color: var(--ess-amber); }
.ess-flow-step__icon--3 { background: rgba(234,88,12,0.12); color: var(--ess-orange); }
.ess-flow-step__icon--4 { background: rgba(220,38,38,0.15); color: var(--ess-red); }

.ess-flow-step__icon svg { width: 18px; height: 18px; }

.ess-flow-step__label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.ess-flow-step__sub {
  font-size: 0.65rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.ess-flow-step--danger { border-color: rgba(220,38,38,0.2); background: rgba(220,38,38,0.04); }

.ess-flow-arrow {
  width: 28px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ess-flow-arrow--active { color: var(--ess-orange); animation: essArrowPulse 1.5s infinite; }
.ess-flow-arrow svg { width: 16px; height: 16px; }

@keyframes essArrowPulse {
  0%, 100% { opacity: 0.4; transform: translateX(-2px); }
  50% { opacity: 1; transform: translateX(2px); }
}

/* Risk factor cards */
.ess-risk__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ess-risk-card {
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition-base);
}

.ess-risk-card:hover {
  border-color: rgba(245,158,11,0.2);
  transform: translateY(-4px);
}

.ess-risk-card__num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--ess-amber);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.ess-risk-card h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.ess-risk-card p {
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* ============================================================
   4. WHY PASSIVE BARRIERS
   ============================================================ */
.ess-passive__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 64px;
}

.ess-defense-stack {
  background: var(--bg-tertiary);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  padding: 36px;
}

.ess-defense-stack__title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 28px;
  text-align: center;
}

.ess-defense-layer {
  padding: 18px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition-base);
}

.ess-defense-layer:hover { transform: translateX(6px); }
.ess-defense-layer:last-child { margin-bottom: 0; }

.ess-defense-layer--active {
  background: rgba(234,88,12,0.08);
  border: 1px solid rgba(234,88,12,0.2);
}

.ess-defense-layer--passive {
  background: rgba(245,158,11,0.06);
  border: 1px solid rgba(245,158,11,0.25);
  box-shadow: 0 0 16px rgba(245,158,11,0.08);
}

.ess-defense-layer--system {
  background: rgba(16,185,129,0.05);
  border: 1px solid rgba(16,185,129,0.15);
}

.ess-defense-layer__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.ess-defense-layer--active .ess-defense-layer__icon { background: rgba(234,88,12,0.15); color: var(--ess-orange); }
.ess-defense-layer--passive .ess-defense-layer__icon { background: rgba(245,158,11,0.15); color: var(--ess-amber); }
.ess-defense-layer--system .ess-defense-layer__icon { background: rgba(16,185,129,0.15); color: var(--ess-green); }

.ess-defense-layer__icon svg { width: 18px; height: 18px; }

.ess-defense-layer__content h5 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.ess-defense-layer__content p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.ess-defense-layer__badge {
  margin-left: auto;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: 100px;
}

.ess-defense-layer--passive .ess-defense-layer__badge {
  background: rgba(245,158,11,0.15);
  color: var(--ess-amber);
  border: 1px solid rgba(245,158,11,0.3);
}

.ess-passive__pillars {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.ess-pillar {
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  gap: 16px;
  transition: all var(--transition-base);
}

.ess-pillar:hover { border-color: rgba(245,158,11,0.2); }

.ess-pillar__icon {
  width: 40px;
  height: 40px;
  background: rgba(245,158,11,0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ess-amber);
  flex-shrink: 0;
}

.ess-pillar__icon svg { width: 20px; height: 20px; }
.ess-pillar h5 { font-size: 0.9375rem; color: var(--text-primary); margin-bottom: 6px; }
.ess-pillar p { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.6; }

/* ============================================================
   5. WHY THIN MATTERS
   ============================================================ */
.ess-thin__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.ess-thin__points { display: flex; flex-direction: column; gap: 22px; margin-top: 36px; }

.ess-thin__point { display: flex; gap: 16px; }

.ess-thin__point-icon {
  width: 36px;
  height: 36px;
  background: rgba(245,158,11,0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ess-amber);
  flex-shrink: 0;
  margin-top: 2px;
}

.ess-thin__point-icon svg { width: 18px; height: 18px; }
.ess-thin__point h5 { font-size: 0.9375rem; color: var(--text-primary); margin-bottom: 4px; font-weight: 600; }
.ess-thin__point p { font-size: 0.8125rem; color: var(--text-secondary); line-height: 1.6; }

.ess-thin__comparison {
  background: var(--bg-tertiary);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  padding: 36px;
}

.ess-thin__comparison-header {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 28px;
  text-align: center;
}

.ess-bar-row { margin-bottom: 18px; }

.ess-bar-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.ess-bar-label span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-tertiary);
}

.ess-bar-track {
  height: 22px;
  background: rgba(255,255,255,0.03);
  border-radius: 4px;
  overflow: hidden;
}

.ess-bar-fill {
  height: 100%;
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding: 0 10px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.ess-bar-fill--stone  { background: rgba(71,85,105,0.5);  width: 100%; }
.ess-bar-fill--glass  { background: rgba(71,85,105,0.4);  width: 83%; }
.ess-bar-fill--std    { background: rgba(100,116,139,0.45); width: 55%; }
.ess-bar-fill--levron { background: var(--ess-gradient-warm); width: 33%; box-shadow: 0 0 12px rgba(245,158,11,0.3); }

.ess-bar-note {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(71,85,105,0.1);
}

.ess-thin__savings {
  display: flex;
  gap: 16px;
  margin-top: 24px;
}

.ess-thin__saving {
  flex: 1;
  text-align: center;
  padding: 16px;
  background: rgba(245,158,11,0.05);
  border-radius: var(--radius-md);
  border: 1px solid rgba(245,158,11,0.12);
}

.ess-thin__saving-val {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ess-amber);
  line-height: 1.1;
}

.ess-thin__saving-lbl { font-size: 0.65rem; color: var(--text-muted); margin-top: 4px; }

/* ============================================================
   6. SOLUTION OVERVIEW
   ============================================================ */
.ess-solution__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.ess-sol-card {
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.ess-sol-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--ess-gradient-warm);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.ess-sol-card:hover {
  border-color: rgba(245,158,11,0.25);
  transform: translateY(-4px);
}

.ess-sol-card:hover::before { transform: scaleX(1); }

.ess-sol-card__icon {
  width: 48px; height: 48px;
  background: rgba(245,158,11,0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ess-amber);
  margin-bottom: 20px;
}

.ess-sol-card__icon svg { width: 24px; height: 24px; }

.ess-sol-card h4 { font-size: 1.0625rem; color: var(--text-primary); margin-bottom: 10px; font-weight: 600; }
.ess-sol-card p { font-size: 0.8125rem; color: var(--text-secondary); line-height: 1.65; margin-bottom: 16px; }

.ess-sol-card__tags { display: flex; flex-wrap: wrap; gap: 6px; }

.ess-tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(71,85,105,0.15);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ============================================================
   7. PERFORMANCE HIGHLIGHTS
   ============================================================ */
.ess-perf__hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: rgba(71,85,105,0.1);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 32px;
}

.ess-perf__hero-main {
  background: var(--bg-tertiary);
  padding: 48px;
}

.ess-perf__hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ess-amber);
  margin-bottom: 16px;
}

.ess-perf__hero-val {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.0;
  letter-spacing: -0.04em;
  margin-bottom: 8px;
}

.ess-perf__hero-unit {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: 20px;
}

.ess-perf__hero-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.ess-perf__hero-side {
  background: rgba(71,85,105,0.08);
  padding: 48px 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.ess-perf__hero-detail {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.ess-perf__hero-detail::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ess-amber);
  flex-shrink: 0;
}

.ess-perf__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.ess-metric-card {
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition-base);
}

.ess-metric-card:hover {
  border-color: rgba(245,158,11,0.2);
  transform: translateY(-2px);
}

.ess-metric-card__label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.ess-metric-card__val {
  font-size: 2rem;
  font-weight: 800;
  color: var(--ess-amber);
  line-height: 1.0;
  margin-bottom: 4px;
  font-family: var(--font-mono);
}

.ess-metric-card__unit {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

.ess-metric-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.ess-metric-card__tag {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(245,158,11,0.08);
  color: var(--ess-amber);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ============================================================
   8. SYSTEM INTEGRATION
   ============================================================ */
.ess-integration__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.ess-integration__diagram {
  background: var(--bg-tertiary);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  padding: 36px;
}

.ess-int-diagram__title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 28px;
  text-align: center;
}

/* ESS Container Cross-Section */
.ess-bess-container {
  position: relative;
  border: 2px solid rgba(71,85,105,0.4);
  border-radius: 8px;
  background: rgba(15,23,42,0.6);
  padding: 12px;
}

.ess-bess-container__label {
  position: absolute;
  top: -10px;
  left: 16px;
  background: var(--bg-tertiary);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 0 8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ess-bess-wall {
  height: 12px;
  background: linear-gradient(90deg, rgba(71,85,105,0.4), rgba(71,85,105,0.6), rgba(71,85,105,0.4));
  border-radius: 4px;
  margin-bottom: 8px;
  position: relative;
}

.ess-bess-wall-inner-barrier {
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 6px;
  background: var(--ess-gradient-warm);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(245,158,11,0.3);
}

.ess-bess-wall--label {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  color: var(--ess-amber);
  text-align: right;
  margin-bottom: 4px;
  letter-spacing: 0.06em;
}

.ess-racks-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin: 8px 0;
}

.ess-rack-block {
  background: rgba(30,41,59,0.6);
  border: 1px solid rgba(71,85,105,0.25);
  border-radius: 4px;
  padding: 6px;
  position: relative;
}

.ess-rack-block__label {
  font-family: var(--font-mono);
  font-size: 0.38rem;
  text-align: center;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.ess-rack-module {
  height: 10px;
  background: rgba(71,85,105,0.25);
  border-radius: 2px;
  margin-bottom: 3px;
}

.ess-rack-block--hot .ess-rack-module:first-of-type {
  background: rgba(234,88,12,0.3);
  animation: essModuleHeat 2s infinite alternate;
}

.ess-rack-block--hot { border-color: rgba(234,88,12,0.3); }

.ess-bess-barrier-horizontal {
  height: 6px;
  background: var(--ess-gradient-warm);
  border-radius: 3px;
  margin: 6px 0;
  box-shadow: 0 0 10px rgba(245,158,11,0.25);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ess-bess-barrier-horizontal span {
  font-family: var(--font-mono);
  font-size: 0.38rem;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(0,0,0,0.3);
  padding: 1px 6px;
  border-radius: 2px;
}

.ess-integration__zones {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ess-zone {
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all var(--transition-base);
}

.ess-zone:hover {
  border-color: rgba(245,158,11,0.2);
  transform: translateX(6px);
}

.ess-zone__num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--ess-amber);
  width: 32px;
  flex-shrink: 0;
}

.ess-zone__content h5 { font-size: 0.9375rem; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; }
.ess-zone__content p { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.6; }

.ess-zone__spec {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.ess-zone__spec span {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(71,85,105,0.1);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================================
   9. COMPARISON
   ============================================================ */
.ess-comparison__header {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.ess-comparison__table-wrap {
  background: var(--bg-tertiary);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 40px;
}

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

.ess-comp-table th,
.ess-comp-table td {
  padding: 16px 20px;
  text-align: left;
  font-size: 0.8125rem;
  border-bottom: 1px solid rgba(71,85,105,0.1);
}

.ess-comp-table th {
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(255,255,255,0.02);
  white-space: nowrap;
}

.ess-comp-table th:first-child { color: var(--text-tertiary); }
.ess-comp-table th:nth-child(2) { color: var(--ess-amber); background: rgba(245,158,11,0.06); }
.ess-comp-table th:nth-child(n+3) { color: var(--text-muted); }

.ess-comp-table td { color: var(--text-secondary); }
.ess-comp-table td:first-child { color: var(--text-primary); font-weight: 600; }
.ess-comp-table td:nth-child(2) { background: rgba(245,158,11,0.04); color: var(--text-primary); font-weight: 600; }
.ess-comp-table tr:last-child td { border-bottom: none; }

.ess-comp-check { color: var(--ess-green); font-size: 1rem; }
.ess-comp-partial { color: var(--ess-amber); font-size: 1rem; }
.ess-comp-cross { color: var(--ess-red); font-size: 0.875rem; }

/* Radar Chart */
.ess-comparison__charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.ess-radar-wrapper {
  background: var(--bg-tertiary);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  padding: 36px;
  text-align: center;
}

.ess-radar-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 24px;
  text-align: center;
}

.ess-radar-svg {
  width: 100%;
  max-width: 280px;
  margin: 0 auto;
  display: block;
}

.ess-radar-legend {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

.ess-radar-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.ess-radar-legend-dot { width: 10px; height: 10px; border-radius: 2px; }

/* Bar chart panel */
.ess-bar-chart-wrap {
  background: var(--bg-tertiary);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  padding: 36px;
}

.ess-bar-chart-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.ess-horiz-bar-row {
  margin-bottom: 16px;
}

.ess-horiz-bar-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 5px;
}

.ess-horiz-bar-name { font-size: 0.75rem; color: var(--text-secondary); }
.ess-horiz-bar-score { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-tertiary); }

.ess-horiz-bar-track {
  height: 16px;
  background: rgba(255,255,255,0.03);
  border-radius: 3px;
  overflow: hidden;
}

.ess-horiz-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.ess-horiz-bar-fill--levron { background: var(--ess-gradient-warm); }
.ess-horiz-bar-fill--stone  { background: rgba(100,116,139,0.5); }
.ess-horiz-bar-fill--glass  { background: rgba(71,85,105,0.45); }
.ess-horiz-bar-fill--generic { background: rgba(51,65,85,0.4); }

/* ============================================================
   10. FIRE RESISTANCE + MOISTURE
   ============================================================ */
.ess-fire__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
}

.ess-fire-card {
  background: var(--bg-tertiary);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  padding: 40px;
  position: relative;
  overflow: hidden;
}

.ess-fire-card--flame { border-color: rgba(234,88,12,0.2); }
.ess-fire-card--moisture { border-color: rgba(71,85,105,0.25); }

.ess-fire-card__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}

.ess-fire-card--flame .ess-fire-card__eyebrow { color: var(--ess-orange); }
.ess-fire-card--moisture .ess-fire-card__eyebrow { color: var(--ess-teal); }

.ess-fire-card h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.3;
}

.ess-fire-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

/* Flame comparison visual */
.ess-flame-compare {
  display: flex;
  gap: 12px;
  align-items: flex-end;
}

.ess-flame-bar {
  flex: 1;
  text-align: center;
}

.ess-flame-bar__fill {
  background: rgba(71,85,105,0.3);
  border-radius: 4px 4px 0 0;
  border: 1px solid rgba(71,85,105,0.4);
  margin-bottom: 8px;
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 8px;
}

.ess-flame-bar--levron .ess-flame-bar__fill {
  background: rgba(234,88,12,0.12);
  border-color: rgba(234,88,12,0.3);
}

.ess-flame-bar__val {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.ess-flame-bar__lbl {
  font-size: 0.65rem;
  color: var(--text-muted);
}

/* Moisture stability visual */
.ess-moisture-compare {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ess-moisture-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ess-moisture-row-label { font-size: 0.75rem; color: var(--text-secondary); width: 140px; flex-shrink: 0; }

.ess-moisture-bar-track {
  flex: 1;
  height: 14px;
  background: rgba(255,255,255,0.03);
  border-radius: 3px;
  overflow: hidden;
}

.ess-moisture-bar-fill {
  height: 100%;
  border-radius: 3px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: rgba(255,255,255,0.9);
  font-weight: 600;
}

.ess-moisture-bar-fill--levron { background: var(--ess-gradient-warm); width: 95%; }
.ess-moisture-bar-fill--mineral { background: rgba(71,85,105,0.4); width: 40%; }
.ess-moisture-bar-fill--glass { background: rgba(71,85,105,0.3); width: 30%; }

.ess-fire__callout {
  background: rgba(245,158,11,0.04);
  border: 1px solid rgba(245,158,11,0.15);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.ess-fire__callout-icon {
  color: var(--ess-amber);
  flex-shrink: 0;
}

.ess-fire__callout-icon svg { width: 24px; height: 24px; }

.ess-fire__callout p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.ess-fire__callout strong { color: var(--text-primary); }

/* ============================================================
   11. MATERIAL SCIENCE — HOW IT WORKS
   ============================================================ */
.ess-science__layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 64px;
}

/* Nano-porous structure diagram (CSS-drawn) */
.ess-nano-diagram {
  background: var(--bg-tertiary);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  padding: 36px;
  text-align: center;
}

.ess-nano-diagram__title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.ess-nano-svg { width: 100%; max-height: 280px; }

.ess-science__facts {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.ess-science-fact {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.ess-science-fact:hover { border-color: rgba(245,158,11,0.2); }

.ess-science-fact__num {
  font-family: var(--font-mono);
  font-size: 1.625rem;
  font-weight: 800;
  color: var(--ess-amber);
  flex-shrink: 0;
  line-height: 1;
}

.ess-science-fact__content h5 { font-size: 0.9375rem; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; }
.ess-science-fact__content p { font-size: 0.8125rem; color: var(--text-secondary); line-height: 1.6; }

.ess-heat-transfer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ess-ht-card {
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: all var(--transition-base);
}

.ess-ht-card:hover { border-color: rgba(245,158,11,0.2); transform: translateY(-3px); }

.ess-ht-card__icon {
  width: 44px; height: 44px;
  border-radius: 50%;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245,158,11,0.08);
  color: var(--ess-amber);
}

.ess-ht-card__icon svg { width: 22px; height: 22px; }
.ess-ht-card h5 { font-size: 0.875rem; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; }
.ess-ht-card p { font-size: 0.775rem; color: var(--text-secondary); line-height: 1.5; }

.ess-ht-card__badge {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--ess-green);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ============================================================
   12. WHY LEVRON AEROGEL
   ============================================================ */
.ess-levron__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 64px;
}

.ess-levron__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 40px;
}

.ess-levron-stat {
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
}

.ess-levron-stat__val {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--ess-amber);
  line-height: 1;
  margin-bottom: 6px;
}

.ess-levron-stat__label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Timeline */
.ess-timeline {
  position: relative;
  padding-left: 32px;
}

.ess-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--ess-orange) 0%, var(--ess-amber) 50%, rgba(71,85,105,0.3) 100%);
}

.ess-timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.ess-timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ess-amber);
  border: 2px solid var(--bg-primary);
}

.ess-timeline-item__year {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--ess-amber);
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: 0.06em;
}

.ess-timeline-item h5 { font-size: 0.9375rem; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
.ess-timeline-item p { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; }

/* Why Levron pillars */
.ess-levron__pillars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.ess-levron-pillar {
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition-base);
}

.ess-levron-pillar:hover { border-color: rgba(245,158,11,0.2); transform: translateY(-3px); }

.ess-levron-pillar__icon {
  color: var(--ess-amber);
  margin-bottom: 12px;
}

.ess-levron-pillar__icon svg { width: 22px; height: 22px; }
.ess-levron-pillar h5 { font-size: 0.9375rem; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; }
.ess-levron-pillar p { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.6; }

/* ============================================================
   13. VALIDATION + COLLABORATION
   ============================================================ */
.ess-collab__flow {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 64px;
  overflow-x: auto;
  padding-bottom: 8px;
}

.ess-collab-step {
  flex: 1;
  min-width: 160px;
  text-align: center;
  padding: 28px 16px;
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  position: relative;
  transition: all var(--transition-base);
}

.ess-collab-step:hover { border-color: rgba(245,158,11,0.25); background: rgba(245,158,11,0.03); }
.ess-collab-step:first-child { border-radius: var(--radius-lg) 0 0 var(--radius-lg); }
.ess-collab-step:last-child  { border-radius: 0 var(--radius-lg) var(--radius-lg) 0; }

.ess-collab-step__num {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--ess-amber);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.ess-collab-step__icon {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(245,158,11,0.08);
  border: 1px solid rgba(245,158,11,0.15);
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ess-amber);
}

.ess-collab-step__icon svg { width: 18px; height: 18px; }

.ess-collab-step h5 { font-size: 0.8125rem; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; }
.ess-collab-step p { font-size: 0.7rem; color: var(--text-secondary); line-height: 1.5; }

.ess-collab-arrow {
  color: rgba(71,85,105,0.5);
  flex-shrink: 0;
  padding: 0 4px;
}

.ess-collab-arrow svg { width: 16px; height: 16px; }

.ess-collab__paths {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.ess-path-card {
  background: var(--bg-tertiary);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-base);
}

.ess-path-card:hover { border-color: rgba(245,158,11,0.25); transform: translateY(-3px); }

.ess-path-card__icon {
  color: var(--ess-amber);
  margin-bottom: 16px;
}

.ess-path-card__icon svg { width: 28px; height: 28px; }
.ess-path-card h4 { font-size: 1.0625rem; font-weight: 600; color: var(--text-primary); margin-bottom: 10px; }
.ess-path-card p { font-size: 0.8125rem; color: var(--text-secondary); line-height: 1.65; margin-bottom: 20px; }

/* ============================================================
   14. RESOURCE HUB
   ============================================================ */
.ess-resources__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}

.ess-resource-card {
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.15);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition-base);
  cursor: pointer;
}

.ess-resource-card:hover {
  border-color: var(--ess-amber);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.ess-resource-card__type {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ess-amber);
  margin-bottom: 12px;
}

.ess-resource-card__icon {
  color: var(--text-tertiary);
  margin-bottom: 14px;
}

.ess-resource-card__icon svg { width: 24px; height: 24px; }

.ess-resource-card h5 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.ess-resource-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.ess-resource-card__link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ess-amber);
  display: flex;
  align-items: center;
  gap: 6px;
}

.ess-resource-card__link svg { width: 14px; height: 14px; }

/* FAQ Accordion */
.ess-faq { margin-top: 48px; }

.ess-faq-item {
  border-bottom: 1px solid rgba(71,85,105,0.15);
}

.ess-faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  background: none;
  border: none;
  text-align: left;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: color var(--transition-fast);
  gap: 16px;
}

.ess-faq-question:hover { color: var(--ess-amber); }

.ess-faq-question svg {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.ess-faq-item.open .ess-faq-question svg { transform: rotate(45deg); color: var(--ess-amber); }

.ess-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.ess-faq-item.open .ess-faq-answer { max-height: 400px; }

.ess-faq-answer p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.75;
  padding-bottom: 24px;
}

/* ============================================================
   15. FINAL CTA
   ============================================================ */
.ess-final-cta {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(30,41,59,0.3) 100%);
  border-top: 1px solid rgba(71,85,105,0.15);
}

.ess-final-cta::before {
  content: '';
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 800px; height: 400px;
  background: radial-gradient(ellipse, rgba(245,158,11,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.ess-cta-paths {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.ess-cta-path {
  background: var(--ess-card-bg);
  border: 1px solid rgba(71,85,105,0.2);
  border-radius: var(--radius-xl);
  padding: 40px;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.ess-cta-path:hover {
  border-color: rgba(245,158,11,0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

.ess-cta-path__audience {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ess-amber);
  margin-bottom: 12px;
}

.ess-cta-path__icon {
  color: var(--text-tertiary);
  margin-bottom: 16px;
}

.ess-cta-path__icon svg { width: 32px; height: 32px; }

.ess-cta-path h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.ess-cta-path p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 28px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .ess-hero__layout,
  .ess-passive__layout,
  .ess-thin__layout,
  .ess-integration__layout,
  .ess-comparison__charts,
  .ess-fire__grid,
  .ess-science__layout,
  .ess-levron__layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .ess-risk__intro-grid { grid-template-columns: 1fr; }
  .ess-solution__grid { grid-template-columns: repeat(2, 1fr); }
  .ess-collab__paths { grid-template-columns: 1fr; }
  .ess-cta-paths { grid-template-columns: 1fr; }
  .ess-perf__hero { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .ess-risk__cards,
  .ess-solution__grid,
  .ess-passive__pillars,
  .ess-heat-transfer,
  .ess-levron__pillars,
  .ess-levron__stats { grid-template-columns: 1fr; }

  .ess-risk__flow-steps { flex-direction: column; }
  .ess-flow-arrow { transform: rotate(90deg); }
  .ess-collab__flow { flex-direction: column; }
  .ess-collab-step { min-width: auto; border-radius: var(--radius-lg) !important; }
  .ess-collab-arrow { transform: rotate(90deg); }

  .ess-hero__strip { flex-wrap: wrap; }
  .ess-hero__strip-item { flex: 1 1 calc(33% - 1px); border-right: none; border-bottom: 1px solid rgba(71,85,105,0.15); }
}