/* ═══════════════════════════════════════
   FEATURE.CSS — Feature detail pages
   ═══════════════════════════════════════ */

/* ─── Hero Layer Animation ─── */
.hero-layers {
  margin-top: 80px;
  width: 100%; max-width: 780px;
  position: relative; height: auto;
}
.hero-layers img {
  width: 100%; height: auto; display: block;
}
.hero-layers .layer {
  position: absolute; left: 50%; transform: translateX(-50%);
  width: 100%; border-radius: 4px;
  transition: all 1.2s cubic-bezier(.22,1,.36,1);
}
.hero-layers .layer-base {
  bottom: 0; width: 100%; height: 32px;
  background: linear-gradient(180deg, #1a2a44, #0d1626);
  border: 1px solid rgba(200,165,92,0.1);
}
.hero-layers .layer-paint {
  bottom: 32px; width: 98%; height: 18px;
  background: linear-gradient(180deg, #2a3a5c, #1a2a44);
  opacity: 0; transform: translate(-50%, 20px);
}
.hero-layers .layer-spraypf-1 {
  bottom: 50px; width: 96%; height: 28px;
  background: linear-gradient(180deg, rgba(200,165,92,0.25), rgba(200,165,92,0.1));
  border: 1px solid rgba(200,165,92,0.3);
  opacity: 0; transform: translate(-50%, 20px);
}
.hero-layers .layer-spraypf-2 {
  bottom: 78px; width: 92%; height: 24px;
  background: linear-gradient(180deg, rgba(200,165,92,0.35), rgba(200,165,92,0.18));
  border: 1px solid rgba(200,165,92,0.4);
  opacity: 0; transform: translate(-50%, 20px);
}
.hero-layers .layer-spraypf-3 {
  bottom: 102px; width: 88%; height: 22px;
  background: linear-gradient(180deg, rgba(200,165,92,0.45), rgba(200,165,92,0.25));
  border: 1px solid rgba(200,165,92,0.5);
  opacity: 0; transform: translate(-50%, 20px);
}
.hero-layers .layer-label {
  position: absolute; font-family: var(--f-mono);
  font-size: 10px; color: rgba(255,255,255,0.4);
  letter-spacing: 0.08em; text-transform: uppercase;
  white-space: nowrap; opacity: 0;
  transition: opacity 1s cubic-bezier(.22,1,.36,1);
}
.hero-layers .label-base { left: calc(50% + 280px); bottom: 12px; }
.hero-layers .label-paint { left: calc(50% + 280px); bottom: 38px; }
.hero-layers .label-s1 { left: calc(50% + 280px); bottom: 60px; color: var(--gold); }
.hero-layers .label-s2 { left: calc(50% + 280px); bottom: 86px; color: var(--gold); }
.hero-layers .label-s3 { left: calc(50% + 280px); bottom: 110px; color: var(--gold); }
.hero-layers.visible .layer-paint { opacity: 1; transform: translate(-50%, 0); transition-delay: 0.3s; }
.hero-layers.visible .layer-spraypf-1 { opacity: 1; transform: translate(-50%, 0); transition-delay: 0.6s; }
.hero-layers.visible .layer-spraypf-2 { opacity: 1; transform: translate(-50%, 0); transition-delay: 0.9s; }
.hero-layers.visible .layer-spraypf-3 { opacity: 1; transform: translate(-50%, 0); transition-delay: 1.2s; }
.hero-layers.visible .label-base { opacity: 1; transition-delay: 1.4s; }
.hero-layers.visible .label-paint { opacity: 1; transition-delay: 1.5s; }
.hero-layers.visible .label-s1 { opacity: 1; transition-delay: 1.6s; }
.hero-layers.visible .label-s2 { opacity: 1; transition-delay: 1.7s; }
.hero-layers.visible .label-s3 { opacity: 1; transition-delay: 1.8s; }

/* ─── Premise Section ─── */
section.premise {
  padding: 140px 32px;
  background: var(--warm-white);
  color: var(--navy);
}
.premise-inner { max-width: 820px; margin: 0 auto; text-align: center; }
.premise h2 {
  font-family: var(--f-display);
  font-size: clamp(34px, 4.8vw, 56px);
  color: var(--navy); line-height: 1.15;
  margin: 0 0 32px; font-weight: 400;
  letter-spacing: -0.01em;
}
.premise h2 em { font-style: italic; color: var(--gold); }
.premise p {
  font-size: 18px; color: var(--text-body);
  line-height: 1.85; max-width: 640px; margin: 0 auto 20px;
}
.premise .big-quote {
  font-family: var(--f-display);
  font-size: clamp(24px, 3vw, 32px);
  color: var(--navy); line-height: 1.4;
  font-style: italic; margin: 48px auto 0;
  max-width: 720px;
  border-top: 1px solid rgba(10,22,40,0.1);
  padding-top: 48px;
}

/* ─── Headline Stats ─── */
section.headline-stats {
  padding: 100px 32px;
  background: var(--navy);
  border-top: 1px solid rgba(200,165,92,0.08);
  border-bottom: 1px solid rgba(200,165,92,0.08);
}
.stats-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: rgba(200,165,92,0.1);
}
.stats-inner.stats-cols-3 { grid-template-columns: repeat(3, 1fr); }
.stats-inner .stat-cell {
  padding: 48px 32px;
  background: var(--navy);
  text-align: center;
}
.stats-inner .stat-number {
  font-family: var(--f-display);
  font-size: clamp(52px, 6vw, 84px);
  color: var(--gold); line-height: 1;
  margin-bottom: 16px; font-weight: 400;
}
.stats-inner .stat-number sup {
  font-size: 0.45em; vertical-align: super;
  margin-left: 4px; font-weight: 400;
}
.stats-inner .stat-label {
  font-size: 13px; color: #fff;
  font-weight: 600; letter-spacing: 0.06em; margin-bottom: 6px;
}
.stats-inner .stat-sub {
  font-size: 12px; color: rgba(255,255,255,0.45);
  font-weight: 300; line-height: 1.5;
}

/* ─── Anatomy / Cross-Section ─── */
section.anatomy {
  padding: 160px 32px;
  background: var(--warm-white);
  color: var(--navy);
}
.anatomy-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1.1fr;
  gap: 80px; align-items: center;
}
.anatomy .section-headline { color: var(--navy); }
.anatomy .section-label { color: var(--gold); }
.anatomy .section-subhead { color: var(--text-body); }

.cross-section {
  position: relative; width: 100%; max-width: 560px;
  aspect-ratio: 1 / 0.85; margin: 0 auto;
}
.cross-section svg { width: 100%; height: auto; }
.cs-layer {
  transition: transform 0.4s cubic-bezier(.22,1,.36,1), filter 0.4s;
  cursor: pointer;
}
.cs-layer:hover {
  transform: translateX(-8px);
  filter: brightness(1.05);
}

.layer-legend { margin-top: 40px; max-width: 560px; }
.layer-legend-item {
  display: grid; grid-template-columns: 20px 1fr auto;
  gap: 16px; align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid rgba(10,22,40,0.06);
}
.layer-legend-item:last-child { border-bottom: none; }
.legend-swatch {
  width: 20px; height: 20px; border-radius: 3px;
  border: 1px solid rgba(10,22,40,0.1);
}
.legend-name { font-size: 14px; color: var(--navy); font-weight: 600; }
.legend-spec {
  font-family: var(--f-mono); font-size: 11px;
  color: var(--text-muted); letter-spacing: 0.05em;
}

/* ─── Build-Up Stages ─── */
section.buildup { padding: 160px 32px; background: var(--navy); }
.buildup-header {
  max-width: 820px; margin: 0 auto 80px; text-align: center;
}
.buildup-header .section-headline { color: #fff; }
.buildup-header .section-subhead {
  color: var(--text-light); margin: 0 auto; text-align: center;
}
.buildup-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.buildup-stage {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(200,165,92,0.1);
  border-radius: 12px; overflow: hidden;
  transition: all 0.4s ease;
}
.buildup-stage:hover {
  border-color: rgba(200,165,92,0.3);
  transform: translateY(-4px);
}
.buildup-visual {
  height: 200px; position: relative;
  background: linear-gradient(135deg, var(--navy-mid) 0%, var(--navy-deep) 100%);
  display: flex; align-items: flex-end; justify-content: center;
  padding: 24px; overflow: hidden;
}
.buildup-stack {
  width: 100%; max-width: 240px; position: relative;
  display: flex; flex-direction: column; gap: 2px;
}
.stack-bar { width: 100%; border-radius: 2px; }
.stack-base { height: 24px; background: #1a2a44; border: 1px solid rgba(200,165,92,0.1); }
.stack-paint { height: 10px; background: #2a3a5c; }
.stack-spf {
  background: linear-gradient(90deg, rgba(200,165,92,0.4), rgba(200,165,92,0.2));
  border: 1px solid rgba(200,165,92,0.3);
}
.buildup-content { padding: 32px 28px; }
.buildup-counter {
  font-family: var(--f-mono); font-size: 11px;
  color: var(--gold); opacity: 0.5; margin-bottom: 12px;
  letter-spacing: 0.1em;
}
.buildup-title {
  font-family: var(--f-display); font-size: 26px;
  color: #fff; margin: 0 0 16px; line-height: 1.2;
}
.buildup-desc {
  font-size: 14.5px; color: var(--text-light); line-height: 1.75;
}

/* ─── Adaptive Thickness (Car Zones) ─── */
section.adaptive {
  padding: 160px 32px;
  background: var(--warm-white);
  color: var(--navy);
}
.adaptive-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.1fr 1fr;
  gap: 80px; align-items: center;
}
.adaptive .section-headline { color: var(--navy); }
.adaptive .section-subhead { color: var(--text-body); }

.car-zones {
  position: relative; width: 100%;
  aspect-ratio: 1 / 0.55;
}
.car-zones svg { width: 100%; height: auto; }
.zone-legend {
  margin-top: 32px;
  display: flex; flex-wrap: wrap; gap: 20px;
}
.zone-item {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--text-body);
}
.zone-dot { width: 14px; height: 14px; border-radius: 50%; }

.adaptive-points { list-style: none; }
.adaptive-points li {
  padding: 20px 0;
  border-bottom: 1px solid rgba(10,22,40,0.08);
  display: grid; grid-template-columns: auto 1fr;
  gap: 20px; align-items: start;
}
.adaptive-points li:last-child { border-bottom: none; }
.ap-num {
  font-family: var(--f-mono); font-size: 13px;
  color: var(--gold); font-weight: 600; letter-spacing: 0.08em;
}
.ap-title {
  font-size: 15.5px; color: var(--navy);
  font-weight: 600; margin-bottom: 6px;
}
.ap-desc {
  font-size: 14px; color: var(--text-body); line-height: 1.7;
}

/* ─── In Practice (Scenarios) ─── */
section.in-practice { padding: 160px 32px; background: var(--navy); }
.practice-header {
  max-width: 820px; margin: 0 auto 80px; text-align: center;
}
.practice-header .section-headline { color: #fff; }
.practice-header .section-subhead {
  color: var(--text-light); margin: 0 auto; text-align: center;
}
.practice-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}
.practice-card {
  padding: 0;
  background: linear-gradient(170deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border: 1px solid rgba(200,165,92,0.1);
  min-height: 420px;
  display: flex; flex-direction: column;
  overflow: hidden;
  transition: all 0.4s ease;
}
.practice-card:hover {
  border-color: rgba(200,165,92,0.3);
  background: linear-gradient(170deg, rgba(200,165,92,0.05), rgba(255,255,255,0.02));
}
.practice-photo {
  width: 100%;
  overflow: hidden;
  flex-shrink: 0;
  background: rgba(0,0,0,0.2);
}
.practice-photo img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: contain;
  object-position: center;
  display: block;
}
.practice-body {
  padding: 36px 32px 40px;
  display: flex; flex-direction: column; flex: 1;
}
.practice-scenario {
  font-family: var(--f-mono); font-size: 10px;
  color: var(--gold); letter-spacing: 0.18em;
  text-transform: uppercase; opacity: 0.7; margin-bottom: 12px;
}
.practice-title {
  font-family: var(--f-display);
  font-size: 26px; color: #fff;
  line-height: 1.2; margin-bottom: 20px;
}
.practice-desc {
  font-size: 14.5px; color: var(--text-light);
  line-height: 1.75; flex: 1;
}
.practice-result {
  margin-top: 24px; padding-top: 20px;
  border-top: 1px solid rgba(200,165,92,0.15);
  font-size: 13px; color: var(--gold); font-weight: 500;
}

/* ─── Timeline Disruption (Horizontal Bars) ─── */
section.timeline-section {
  padding: 160px 32px;
  background: var(--warm-white);
  color: var(--navy);
}
.timeline-inner { max-width: 1200px; margin: 0 auto; }
.timeline-header {
  text-align: center; max-width: 820px; margin: 0 auto 80px;
}
.timeline-header .section-headline { color: var(--navy); }
.timeline-header .section-subhead {
  color: var(--text-body); margin: 0 auto; text-align: center;
}
.timeline-chart {
  position: relative;
  background: #fff;
  border-radius: 12px;
  padding: 60px 40px 40px;
  box-shadow: 0 2px 40px rgba(10,22,40,0.06);
}
.timeline-legend {
  display: flex; gap: 32px; margin-bottom: 40px; flex-wrap: wrap;
}
.tl-legend-item {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--navy); font-weight: 500;
}
.tl-bar { width: 24px; height: 4px; border-radius: 2px; }
.tl-bar.traditional { background: #BC3A3A; }
.tl-bar.sppf { background: var(--gold); }
.timeline-row {
  display: grid; grid-template-columns: 140px 1fr;
  gap: 24px; align-items: center;
  padding: 20px 0;
  border-top: 1px solid rgba(10,22,40,0.06);
}
.tl-label {
  font-family: var(--f-mono); font-size: 12px;
  color: var(--text-muted); letter-spacing: 0.05em;
  text-transform: uppercase;
}
.tl-track { display: flex; flex-direction: column; gap: 8px; }
.tl-progress {
  position: relative; height: 22px;
  background: rgba(10,22,40,0.04);
  border-radius: 2px; overflow: hidden;
}
.tl-progress .fill {
  position: absolute; top: 0; left: 0; bottom: 0;
  background: linear-gradient(90deg, rgba(188,58,58,0.7), rgba(188,58,58,0.3));
  border-right: 2px solid #BC3A3A;
  transition: width 1.2s cubic-bezier(.22,1,.36,1);
}
.tl-progress.sppf .fill {
  background: linear-gradient(90deg, rgba(200,165,92,0.7), rgba(200,165,92,0.3));
  border-right: 2px solid var(--gold);
}
.tl-progress .tag-inline {
  position: absolute; right: 12px; top: 50%;
  transform: translateY(-50%);
  font-family: var(--f-mono); font-size: 10px;
  color: var(--navy); letter-spacing: 0.08em;
  text-transform: uppercase; font-weight: 600;
  background: rgba(255,255,255,0.85);
  padding: 2px 8px; border-radius: 2px;
}
.tl-years {
  display: grid; grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
  margin-top: 16px; margin-left: 164px;
  font-family: var(--f-mono); font-size: 10px;
  color: var(--text-muted); letter-spacing: 0.08em;
}

/* ─── Tech Specs (Accordion) ─── */
section.tech-specs { padding: 160px 32px; background: var(--navy); }
.specs-inner { max-width: 900px; margin: 0 auto; }
.specs-header { text-align: center; margin-bottom: 64px; }
.specs-header .section-headline { color: #fff; }
.specs-header .section-subhead {
  color: var(--text-light); margin: 0 auto; text-align: center;
}
.spec-group {
  border-bottom: 1px solid rgba(200,165,92,0.1);
}
.spec-group:first-child {
  border-top: 1px solid rgba(200,165,92,0.1);
}
.spec-toggle {
  width: 100%; padding: 28px 0;
  background: none; border: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  color: #fff; font-family: var(--f-body); text-align: left;
}
.spec-toggle-label {
  font-family: var(--f-mono); font-size: 11px;
  color: var(--gold); letter-spacing: 0.15em;
  text-transform: uppercase; margin-right: 16px;
  opacity: 0.7; min-width: 40px;
}
.spec-toggle-title {
  flex: 1; font-size: 19px; font-weight: 500; color: #fff;
}
.spec-icon {
  font-size: 20px; color: var(--gold);
  transition: transform 0.4s cubic-bezier(.22,1,.36,1);
}
.spec-group.open .spec-icon { transform: rotate(45deg); }
.spec-body {
  max-height: 0; overflow: hidden;
  transition: max-height 0.5s cubic-bezier(.22,1,.36,1);
}
.spec-group.open .spec-body { max-height: 800px; }
.spec-body-inner {
  padding: 0 0 32px 56px;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px 40px;
}
.spec-row {
  display: flex; justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 13.5px;
}
.spec-row span:first-child { color: var(--text-light); }
.spec-row span:last-child {
  color: #fff; font-weight: 500;
  font-family: var(--f-mono); font-size: 12.5px;
}

/* ─── Environmental ─── */
section.environmental {
  padding: 160px 32px;
  background: linear-gradient(175deg, var(--navy-mid) 0%, var(--navy) 100%);
}
.env-inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.env-inner .section-headline { color: #fff; }
.env-inner .section-subhead { color: var(--text-light); }
.env-quote {
  font-family: var(--f-display);
  font-size: 22px; line-height: 1.6;
  font-style: italic; color: #fff;
  margin-top: 32px; padding-left: 24px;
  border-left: 2px solid var(--gold);
}
.env-impact { display: flex; flex-direction: column; gap: 4px; }
.env-impact-row {
  padding: 24px 0;
  border-bottom: 1px solid rgba(200,165,92,0.1);
}
.env-impact-row:last-child { border-bottom: none; }
.env-impact-label {
  font-family: var(--f-mono); font-size: 10px;
  color: var(--gold); letter-spacing: 0.15em;
  text-transform: uppercase; opacity: 0.7; margin-bottom: 6px;
}
.env-impact-value {
  font-family: var(--f-display); font-size: 32px;
  color: #fff; line-height: 1.1; margin-bottom: 8px;
}
.env-impact-desc {
  font-size: 13.5px; color: var(--text-light); line-height: 1.6;
}

/* ─── Paired With (Cross-Link Cards) ─── */
section.paired {
  padding: 140px 32px;
  background: var(--warm-white);
  color: var(--navy);
}
.paired-inner { max-width: 1200px; margin: 0 auto; }
.paired-header { text-align: center; margin-bottom: 64px; }
.paired-header .section-headline { color: var(--navy); }
.paired-header .section-subhead {
  color: var(--text-body); margin: 0 auto; text-align: center;
}
.paired-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.paired-card {
  background: #fff;
  border: 1px solid rgba(10,22,40,0.08);
  border-radius: 12px;
  padding: 48px 40px;
  text-decoration: none; display: block;
  transition: all 0.4s ease;
  position: relative; overflow: hidden;
}
.paired-card::after {
  content: ""; position: absolute;
  top: 0; right: 0; width: 120px; height: 120px;
  background: radial-gradient(circle at top right, rgba(200,165,92,0.08), transparent 70%);
  transition: all 0.4s;
}
.paired-card:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(10,22,40,0.08);
}
.paired-counter {
  font-family: var(--f-mono); font-size: 11px;
  color: var(--gold); letter-spacing: 0.15em;
  text-transform: uppercase; opacity: 0.7; margin-bottom: 12px;
}
.paired-title {
  font-family: var(--f-display); font-size: 30px;
  color: var(--navy); line-height: 1.15; margin-bottom: 16px;
}
.paired-desc {
  font-size: 14.5px; color: var(--text-body);
  line-height: 1.7; margin-bottom: 24px;
}
.paired-cta {
  font-size: 13px; color: var(--gold);
  font-weight: 600; letter-spacing: 0.06em;
  display: flex; align-items: center; gap: 8px;
}
.paired-cta .arrow { transition: transform 0.3s; }
.paired-card:hover .paired-cta .arrow { transform: translateX(4px); }

/* ─── Feature Prev/Next Nav ─── */
section.feature-nav {
  padding: 0 32px;
  background: var(--navy-deep);
  border-top: 1px solid rgba(200,165,92,0.08);
  border-bottom: 1px solid rgba(200,165,92,0.08);
}
.feature-nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr;
}
.fn-item {
  padding: 48px 40px;
  text-decoration: none; display: block;
  transition: background 0.3s;
}
.fn-item:first-child {
  border-right: 1px solid rgba(200,165,92,0.08);
}
.fn-item:hover { background: rgba(200,165,92,0.03); }
.fn-item.next { text-align: right; }
.fn-label {
  font-family: var(--f-mono); font-size: 10px;
  color: var(--gold); letter-spacing: 0.2em;
  text-transform: uppercase; opacity: 0.6; margin-bottom: 10px;
}
.fn-title {
  font-family: var(--f-display); font-size: 24px;
  color: #fff; margin-bottom: 8px;
}
.fn-desc {
  font-size: 13px; color: var(--text-light);
}

/* ─── Feature Responsive ─── */
@media (max-width: 900px) {
  .stats-inner,
  .stats-inner.stats-cols-3 { grid-template-columns: 1fr; }
  .stats-inner .stat-cell { padding: 28px 24px; }
  .anatomy-inner, .adaptive-inner, .env-inner {
    grid-template-columns: 1fr; gap: 48px;
  }
  .buildup-grid, .practice-grid { grid-template-columns: 1fr; }
  .paired-grid { grid-template-columns: 1fr; }
  .spec-body-inner { grid-template-columns: 1fr; }
  .timeline-row { grid-template-columns: 1fr; gap: 8px; }
  .tl-years { margin-left: 0; }
  .feature-nav-inner { grid-template-columns: 1fr; }
  .fn-item:first-child { border-right: none; border-bottom: 1px solid rgba(200,165,92,0.08); }
  .fn-item.next { text-align: left; }
}
@media (max-width: 560px) {
  .stats-inner,
  .stats-inner.stats-cols-3 { grid-template-columns: 1fr; }
  .hero-layers .layer-label { display: none; }
}


/* ═══════════════════════════════════════
   SHARED FEATURE PAGE — Additional Styles
   (Battle-Tested, and reusable for others)
   ═══════════════════════════════════════ */

/* ─── Page Hero (shared base) ─── */
section.page-hero {
  min-height: 100vh; padding: 180px 32px 100px;
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; text-align: center;
  background: radial-gradient(ellipse at 50% 35%, var(--navy-light) 0%, var(--navy) 70%);
  position: relative; overflow: hidden;
}
section.page-hero.warm {
  background: radial-gradient(ellipse at 50% 40%, #1a1420 0%, var(--navy) 70%);
}
section.page-hero.warm::before {
  content: ""; position: absolute; inset: 0; opacity: 0.04;
  background: repeating-linear-gradient(45deg, transparent, transparent 40px, rgba(224,78,60,0.15) 40px, rgba(224,78,60,0.15) 42px);
  pointer-events: none;
}
.chapter-mark {
  font-family: var(--f-mono); font-size: 12px; color: var(--gold);
  letter-spacing: 0.3em; text-transform: uppercase; margin-bottom: 24px; opacity: 0.7;
}
section.page-hero h1 {
  font-family: var(--f-display); font-size: clamp(52px, 9vw, 128px);
  color: #fff; line-height: 1.0; margin: 0 0 32px; font-weight: 400;
  max-width: 1100px; letter-spacing: -0.02em; position: relative;
}
section.page-hero h1 em { color: var(--gold); font-style: italic; display: block; }
section.page-hero .subhead {
  font-size: 21px; color: var(--text-light); max-width: 640px;
  line-height: 1.65; margin: 0 auto; font-weight: 300; position: relative;
}

/* ─── Matrix Visualization (Anatomy) ─── */
.matrix-viz {
  position: relative; width: 100%; max-width: 560px;
  aspect-ratio: 1/1; margin: 0 auto; overflow: hidden; border-radius: 8px;
  background: linear-gradient(135deg, var(--navy-mid), var(--navy-light));
  display: flex; align-items: center; justify-content: center;
}
.matrix-props { margin-top: 40px; max-width: 560px; }
.matrix-prop-item {
  display: grid; grid-template-columns: 20px 1fr auto; gap: 16px;
  align-items: center; padding: 14px 0;
  border-bottom: 1px solid rgba(10,22,40,0.06);
}
.matrix-prop-item:last-child { border-bottom: none; }
.prop-swatch { width: 20px; height: 20px; border-radius: 3px; border: 1px solid rgba(10,22,40,0.1); }
.prop-name { font-size: 14px; color: var(--navy); font-weight: 600; }
.prop-spec { font-family: var(--f-mono); font-size: 11px; color: var(--text-muted); letter-spacing: 0.05em; }

/* ─── Physics Scenarios ─── */
section.scenarios-physics { padding: 160px 32px; background: var(--navy); }
.physics-header { max-width: 820px; margin: 0 auto 80px; text-align: center; }
.physics-header .section-headline { color: #fff; }
.physics-header .section-subhead { color: var(--text-light); margin: 0 auto; text-align: center; }
.physics-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.physics-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(200,165,92,0.1);
  border-radius: 12px; overflow: hidden; transition: all 0.4s ease;
}
.physics-card:hover {
  border-color: rgba(200,165,92,0.3); transform: translateY(-4px);
}
.physics-visual {
  height: 220px; position: relative;
  background: linear-gradient(135deg, var(--navy-mid) 0%, var(--navy-deep) 100%);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.physics-content { padding: 32px 28px; }
.physics-counter {
  font-family: var(--f-mono); font-size: 11px; color: var(--gold);
  opacity: 0.5; margin-bottom: 12px; letter-spacing: 0.1em;
}
.physics-title {
  font-family: var(--f-display); font-size: 26px;
  color: #fff; margin: 0 0 16px; line-height: 1.2;
}
.physics-desc { font-size: 14.5px; color: var(--text-light); line-height: 1.75; }

/* ─── Contexts / Environment Chart ─── */
section.contexts {
  padding: 160px 32px;
  background: var(--warm-white); color: var(--navy);
}
.contexts-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.1fr 1fr;
  gap: 80px; align-items: center;
}
.contexts .section-headline { color: var(--navy); }
.contexts .section-subhead { color: var(--text-body); }
.env-chart {
  position: relative; width: 100%;
  background: #fff; border-radius: 12px; padding: 48px 32px;
  box-shadow: 0 2px 40px rgba(10,22,40,0.06);
}
.env-row {
  display: grid; grid-template-columns: 120px 1fr auto;
  gap: 20px; align-items: center; padding: 18px 0;
  border-bottom: 1px solid rgba(10,22,40,0.06);
}
.env-row:first-child { padding-top: 0; }
.env-row:last-child { border-bottom: none; padding-bottom: 0; }
.env-label { font-size: 14px; font-weight: 600; color: var(--navy); }
.env-bar-wrap {
  position: relative; height: 12px;
  background: rgba(10,22,40,0.04); border-radius: 2px; overflow: hidden;
}
.env-bar {
  position: absolute; top: 0; left: 0; bottom: 0;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  border-radius: 2px;
}
.env-value {
  font-family: var(--f-mono); font-size: 11px; color: var(--navy);
  letter-spacing: 0.08em; font-weight: 600; min-width: 50px; text-align: right;
}

/* ─── Stress Comparison ─── */
section.stress-chart-section {
  padding: 160px 32px;
  background: var(--warm-white); color: var(--navy);
}
.chart-inner { max-width: 1200px; margin: 0 auto; }
.chart-header { text-align: center; max-width: 820px; margin: 0 auto 80px; }
.chart-header .section-headline { color: var(--navy); }
.chart-header .section-subhead { color: var(--text-body); margin: 0 auto; text-align: center; }
.comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.comp-card {
  background: #fff; border-radius: 12px; padding: 40px;
  box-shadow: 0 2px 40px rgba(10,22,40,0.06);
  border: 1px solid rgba(10,22,40,0.04);
}
.comp-label {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.15em;
  text-transform: uppercase; margin-bottom: 8px;
}
.comp-label.bad { color: var(--impact-red); }
.comp-label.good { color: var(--gold-dark); }
.comp-title {
  font-family: var(--f-display); font-size: 26px;
  color: var(--navy); margin-bottom: 24px;
}
.comp-viz {
  height: 180px; position: relative; margin-bottom: 24px;
  overflow: hidden; border-radius: 8px;
  background: linear-gradient(135deg, #1a2a44, #132744);
}
.comp-metrics { display: grid; gap: 12px; }
.comp-metric {
  display: flex; justify-content: space-between; padding: 10px 0;
  border-bottom: 1px solid rgba(10,22,40,0.06);
}
.comp-metric:last-child { border-bottom: none; }
.comp-metric-label { font-size: 13px; color: var(--text-body); }
.comp-metric-value {
  font-family: var(--f-mono); font-size: 12px;
  color: var(--navy); font-weight: 600;
}

/* ─── Motorsport Pedigree ─── */
section.motorsport {
  padding: 160px 32px;
  background: linear-gradient(175deg, var(--navy-mid) 0%, var(--navy) 100%);
}
.motorsport-inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.motorsport-inner .section-headline { color: #fff; }
.motorsport-inner .section-subhead { color: var(--text-light); }
.ms-quote {
  font-family: var(--f-display); font-size: 22px; line-height: 1.6;
  font-style: italic; color: #fff; margin-top: 32px;
  padding-left: 24px; border-left: 2px solid var(--gold);
}
.ms-stack { display: flex; flex-direction: column; gap: 4px; }
.ms-row { padding: 24px 0; border-bottom: 1px solid rgba(200,165,92,0.1); }
.ms-row:last-child { border-bottom: none; }
.ms-label {
  font-family: var(--f-mono); font-size: 10px; color: var(--gold);
  letter-spacing: 0.15em; text-transform: uppercase; opacity: 0.7; margin-bottom: 6px;
}
.ms-value {
  font-family: var(--f-display); font-size: 32px;
  color: #fff; line-height: 1.1; margin-bottom: 8px;
}
.ms-desc { font-size: 13.5px; color: var(--text-light); line-height: 1.6; }

/* ─── Responsive (Battle-Tested additions) ─── */
@media (max-width: 900px) {
  .anatomy-inner,
  .contexts-inner,
  .motorsport-inner {
    grid-template-columns: 1fr; gap: 48px;
  }
  .physics-grid,
  .comparison-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 560px) {
  section.page-hero {
    min-height: 0;
    padding: 176px 20px 64px !important;
  }
  .matrix-viz { aspect-ratio: auto; height: 300px; }
}

/* ═══════════════════════════════════════
   SHARED FEATURE — Renewable Surface Styles
   ═══════════════════════════════════════ */

/* ─── Before/After Visual ─── */
.restore-visual {
  margin-top: 80px; width: 100%; max-width: 720px;
  aspect-ratio: 1; height: auto;
  position: relative; border-radius: 12px; overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  cursor: ew-resize; touch-action: none; user-select: none;
}
.restore-img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover; pointer-events: none;
}
.restore-before-clip {
  position: absolute; top: 0; left: 0; bottom: 0;
  width: 50%; overflow: hidden; z-index: 1;
}
.restore-before-clip .restore-img {
  width: var(--restore-w, 720px);
  max-width: none; height: 100%;
  left: 0; right: auto;
}
.restore-label {
  position: absolute; z-index: 4;
  font-family: var(--f-mono); font-size: 10px;
  letter-spacing: 0.2em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 3px; backdrop-filter: blur(8px);
  pointer-events: none;
}
.restore-label-before {
  top: 16px; left: 16px;
  background: rgba(0,0,0,0.4); color: rgba(255,255,255,0.7);
  border: 1px solid rgba(255,255,255,0.15);
}
.restore-label-after {
  bottom: 16px; right: 16px;
  background: rgba(200,165,92,0.2); color: var(--gold-light);
  border: 1px solid rgba(200,165,92,0.4);
}
.restore-divider {
  position: absolute; left: 50%; top: 0; bottom: 0;
  width: 2px; transform: translateX(-50%);
  background: linear-gradient(180deg, transparent, var(--gold), transparent); z-index: 3;
  pointer-events: none;
}
.restore-divider::before {
  content: ""; position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--gold); box-shadow: 0 0 24px rgba(200,165,92,0.6);
}
.restore-divider::after {
  content: "\2194"; position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  color: var(--navy); font-size: 18px; font-weight: 700;
}

/* ─── Surface Anatomy ─── */
section.anatomy .surface-viz {
  position: relative; width: 100%; max-width: 560px;
  aspect-ratio: 1/0.85; margin: 0 auto; overflow: hidden; border-radius: 8px;
  background: linear-gradient(135deg, var(--navy-mid), var(--navy-light));
  display: flex; align-items: center; justify-content: center;
}
.surface-legend { margin-top: 40px; max-width: 560px; }
.surface-legend-item {
  display: grid; grid-template-columns: 20px 1fr auto; gap: 16px;
  align-items: center; padding: 14px 0;
  border-bottom: 1px solid rgba(10,22,40,0.06);
}
.surface-legend-item:last-child { border-bottom: none; }
.surface-legend-item .legend-swatch {
  width: 20px; height: 20px; border-radius: 3px; border: 1px solid rgba(10,22,40,0.1);
}

/* ─── 3 Stages of Renewal ─── */
section.renewal-stages { padding: 160px 32px; background: var(--navy); }
.stages-header { max-width: 820px; margin: 0 auto 80px; text-align: center; }
.stages-header .section-headline { color: #fff; }
.stages-header .section-subhead { color: var(--text-light); margin: 0 auto; text-align: center; }
.stages-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.stage-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(200,165,92,0.1);
  border-radius: 12px; overflow: hidden; transition: all 0.4s ease;
}
.stage-card:hover {
  border-color: rgba(200,165,92,0.3); transform: translateY(-4px);
}
.stage-visual {
  height: 200px; position: relative;
  background: linear-gradient(135deg, var(--navy-mid) 0%, var(--navy-deep) 100%);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.stage-content { padding: 32px 28px; }
.stage-counter {
  font-family: var(--f-mono); font-size: 11px; color: var(--gold);
  opacity: 0.5; margin-bottom: 12px; letter-spacing: 0.1em;
}
.stage-title {
  font-family: var(--f-display); font-size: 26px;
  color: #fff; margin: 0 0 16px; line-height: 1.2;
}
.stage-desc { font-size: 14.5px; color: var(--text-light); line-height: 1.75; }

/* ─── Renewal Zones ─── */
section.renewal-zones {
  padding: 160px 32px;
  background: var(--warm-white); color: var(--navy);
}
.zones-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.1fr 1fr;
  gap: 80px; align-items: center;
}
.zones-inner .section-headline { color: var(--navy); }
.zones-inner .section-subhead { color: var(--text-body); }
.zone-car-viz {
  position: relative; width: 100%; aspect-ratio: 1/0.55;
  overflow: hidden; border-radius: 8px;
  background: var(--warm-white);
  display: flex; align-items: center; justify-content: center;
}
.zone-legend-strip { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 20px; }
.zone-strip-item {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--text-body);
}

/* ─── Gloss Retention Curve ─── */
section.gloss-curve {
  padding: 160px 32px;
  background: var(--warm-white); color: var(--navy);
}
.curve-inner { max-width: 1200px; margin: 0 auto; }
.curve-header { text-align: center; max-width: 820px; margin: 0 auto 80px; }
.curve-header .section-headline { color: var(--navy); }
.curve-header .section-subhead { color: var(--text-body); margin: 0 auto; text-align: center; }
.gloss-chart {
  background: #fff; border-radius: 12px; padding: 56px 48px;
  box-shadow: 0 2px 40px rgba(10,22,40,0.06); position: relative;
}
.gloss-legend { display: flex; gap: 32px; margin-bottom: 24px; flex-wrap: wrap; }
.gl-item {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--navy); font-weight: 500;
}
.gl-line { width: 24px; height: 3px; border-radius: 2px; }
.gl-line.sppf { background: var(--gold); }
.gl-line.factory { background: var(--fade-amber); }
.gl-line.trad { background: #9AA8B8; }
.gloss-svg-wrap {
  width: 100%; height: 400px; position: relative; margin-top: 24px;
  border-radius: 8px; overflow: hidden;
  background: linear-gradient(135deg, #f8f6f0, #eae6dc);
  display: flex; align-items: center; justify-content: center;
}
.chart-x-labels {
  display: grid; grid-template-columns: repeat(5, 1fr);
  margin-top: 12px; padding-left: 60px; padding-right: 20px;
}
.chart-x-labels span {
  font-family: var(--f-mono); font-size: 10px; color: var(--text-muted);
  text-align: center; letter-spacing: 0.05em;
}

/* ─── Philosophy ─── */
section.philosophy {
  padding: 160px 32px;
  background: linear-gradient(175deg, var(--navy-mid) 0%, var(--navy) 100%);
}
.phil-inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.phil-inner .section-headline { color: #fff; }
.phil-inner .section-subhead { color: var(--text-light); }
.phil-quote {
  font-family: var(--f-display); font-size: 22px; line-height: 1.6;
  font-style: italic; color: #fff; margin-top: 32px;
  padding-left: 24px; border-left: 2px solid var(--gold);
}
.phil-stack { display: flex; flex-direction: column; gap: 4px; }
.phil-row { padding: 24px 0; border-bottom: 1px solid rgba(200,165,92,0.1); }
.phil-row:last-child { border-bottom: none; }
.phil-label {
  font-family: var(--f-mono); font-size: 10px; color: var(--gold);
  letter-spacing: 0.15em; text-transform: uppercase; opacity: 0.7; margin-bottom: 6px;
}
.phil-value {
  font-family: var(--f-display); font-size: 32px;
  color: #fff; line-height: 1.1; margin-bottom: 8px;
}
.phil-desc { font-size: 13.5px; color: var(--text-light); line-height: 1.6; }

/* ─── Responsive (Renewable) ─── */
@media (max-width: 900px) {
  .zones-inner, .phil-inner { grid-template-columns: 1fr; gap: 48px; }
  .stages-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════
   SHARED FEATURE — Fusion Bonding Styles
   ═══════════════════════════════════════ */

/* ─── Peel Visual (Hero) ─── */
.peel-visual {
  margin-top: 80px; width: 100%; max-width: 780px; height: auto;
  position: relative;
}
.peel-visual img {
  width: 100%; height: auto; display: block;
}
.peel-paint {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, #2a3a5c 0%, #1a2a44 100%);
}
.peel-paint::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 30%, rgba(255,255,255,0.06) 0%, transparent 60%);
}
.peel-layer {
  position: absolute; top: 0; left: 0; right: 0; height: 100%;
  background: linear-gradient(180deg, rgba(200,165,92,0.55) 0%, rgba(200,165,92,0.35) 100%);
  border: 1px solid rgba(200,165,92,0.5);
  transform-origin: left center;
  transform: perspective(1200px) rotateY(0deg);
  transition: transform 2s cubic-bezier(.22,1,.36,1);
  backface-visibility: hidden;
}
.peel-visual:hover .peel-layer {
  transform: perspective(1200px) rotateY(-55deg) translateX(60px);
}
.peel-layer::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(200,165,92,0.8) 0%, rgba(200,165,92,0.4) 20%, rgba(200,165,92,0.3) 100%);
}
.peel-edge-line {
  position: absolute; top: 20%; bottom: 20%; left: 50%;
  width: 1px; background: linear-gradient(180deg, transparent, var(--gold), transparent);
  opacity: 0; transition: opacity 0.6s;
}
.peel-visual:hover .peel-edge-line { opacity: 0.8; }
.peel-label {
  position: absolute; font-family: var(--f-mono); font-size: 10px;
  letter-spacing: 0.18em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 3px;
  backdrop-filter: blur(8px); z-index: 3;
}
.peel-label.film-label {
  top: 16px; left: 16px;
  background: rgba(200,165,92,0.2); color: var(--gold-light);
  border: 1px solid rgba(200,165,92,0.4);
}
.peel-label.paint-label {
  bottom: 16px; right: 16px;
  background: rgba(10,22,40,0.6); color: #fff;
  border: 1px solid rgba(255,255,255,0.15);
}
.peel-hover-hint {
  position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%);
  font-family: var(--f-mono); font-size: 10px;
  color: rgba(255,255,255,0.4); letter-spacing: 0.2em;
  text-transform: uppercase; z-index: 2;
}

/* ─── Bond Anatomy ─── */
.anatomy .bond-viz {
  position: relative; width: 100%; max-width: 560px;
  aspect-ratio: 1/0.9; margin: 0 auto; overflow: hidden; border-radius: 8px;
  background: linear-gradient(135deg, var(--navy-mid), var(--navy-light));
  display: flex; align-items: center; justify-content: center;
}
.bond-legend { margin-top: 40px; max-width: 560px; }
.bond-legend-item {
  display: grid; grid-template-columns: 20px 1fr auto; gap: 16px;
  align-items: center; padding: 14px 0;
  border-bottom: 1px solid rgba(10,22,40,0.06);
}
.bond-legend-item:last-child { border-bottom: none; }

/* ─── Three Moments ─── */
section.moments { padding: 160px 32px; background: var(--navy); }
.moments-header { max-width: 820px; margin: 0 auto 80px; text-align: center; }
.moments-header .section-headline { color: #fff; }
.moments-header .section-subhead { color: var(--text-light); margin: 0 auto; text-align: center; }
.moments-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.moment-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(200,165,92,0.1);
  border-radius: 12px; overflow: hidden; transition: all 0.4s ease;
}
.moment-card:hover {
  border-color: rgba(200,165,92,0.3); transform: translateY(-4px);
}
.moment-visual {
  height: 200px; position: relative;
  background: linear-gradient(135deg, var(--navy-mid) 0%, var(--navy-deep) 100%);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.moment-content { padding: 32px 28px; }
.moment-counter {
  font-family: var(--f-mono); font-size: 11px; color: var(--gold);
  opacity: 0.5; margin-bottom: 12px; letter-spacing: 0.1em;
}
.moment-title {
  font-family: var(--f-display); font-size: 26px;
  color: #fff; margin: 0 0 16px; line-height: 1.2;
}
.moment-desc { font-size: 14.5px; color: var(--text-light); line-height: 1.75; }

/* ─── Compatibility Map ─── */
section.compat {
  padding: 160px 32px;
  background: var(--warm-white); color: var(--navy);
}
.compat-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.1fr 1fr;
  gap: 80px; align-items: center;
}
.compat .section-headline { color: var(--navy); }
.compat .section-subhead { color: var(--text-body); }
.compat-grid {
  background: #fff; border-radius: 12px; padding: 48px 32px;
  box-shadow: 0 2px 40px rgba(10,22,40,0.06);
}
.compat-header-row {
  display: grid; grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 16px; padding-bottom: 20px;
  border-bottom: 2px solid rgba(10,22,40,0.08);
  font-family: var(--f-mono); font-size: 10px;
  color: var(--text-muted); letter-spacing: 0.12em;
  text-transform: uppercase; align-items: end;
}
.compat-row {
  display: grid; grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 16px; padding: 18px 0;
  border-bottom: 1px solid rgba(10,22,40,0.06);
  align-items: center;
}
.compat-row:last-child { border-bottom: none; }
.compat-inner > * { min-width: 0; }
.compat-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  width: 100%;
  min-width: 0;
  margin: 0 -8px;
  padding: 0 8px;
}
.compat-scroll .compat-header-row,
.compat-scroll .compat-row { min-width: 0; }
.compat-category { font-size: 14px; color: var(--navy); font-weight: 600; }
.compat-dot {
  width: 16px; height: 16px; border-radius: 50%;
  margin: 0 auto; position: relative;
}
.compat-dot.full { background: var(--gold); box-shadow: 0 0 12px rgba(200,165,92,0.4); }
.compat-dot.partial { background: rgba(200,165,92,0.35); border: 1px solid var(--gold); }
.compat-dot.empty { background: transparent; border: 1px dashed rgba(10,22,40,0.2); }

/* ─── Peel Demo Sequence ─── */
section.peel-demo {
  padding: 160px 32px;
  background: var(--warm-white); color: var(--navy);
}
.demo-inner { max-width: 1200px; margin: 0 auto; }
.demo-header { text-align: center; max-width: 820px; margin: 0 auto 80px; }
.demo-header .section-headline { color: var(--navy); }
.demo-header .section-subhead { color: var(--text-body); margin: 0 auto; text-align: center; }
.demo-sequence {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; background: #fff; border-radius: 12px;
  padding: 48px 32px;
  box-shadow: 0 2px 40px rgba(10,22,40,0.06);
}
.demo-step { text-align: center; }
.demo-viz {
  height: 160px; margin-bottom: 20px;
  background: linear-gradient(180deg, #f4f2ed 0%, #ebe7dd 100%);
  border-radius: 8px; position: relative; overflow: hidden;
  border: 1px solid rgba(10,22,40,0.06);
  display: flex; align-items: center; justify-content: center;
}
.demo-counter {
  font-family: var(--f-mono); font-size: 10px;
  color: var(--gold); letter-spacing: 0.15em;
  text-transform: uppercase; margin-bottom: 8px; opacity: 0.7;
}
.demo-title {
  font-family: var(--f-display); font-size: 20px;
  color: var(--navy); margin-bottom: 8px; line-height: 1.25;
}
.demo-desc { font-size: 13px; color: var(--text-body); line-height: 1.6; }

/* ─── Preservation ─── */
section.preservation {
  padding: 160px 32px;
  background: linear-gradient(175deg, var(--navy-mid) 0%, var(--navy) 100%);
}
.preserv-inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.preserv-inner .section-headline { color: #fff; }
.preserv-inner .section-subhead { color: var(--text-light); }
.preserv-quote {
  font-family: var(--f-display); font-size: 22px; line-height: 1.6;
  font-style: italic; color: #fff; margin-top: 32px;
  padding-left: 24px; border-left: 2px solid var(--gold);
}
.preserv-stack { display: flex; flex-direction: column; gap: 4px; }
.preserv-row { padding: 24px 0; border-bottom: 1px solid rgba(200,165,92,0.1); }
.preserv-row:last-child { border-bottom: none; }
.preserv-label {
  font-family: var(--f-mono); font-size: 10px; color: var(--gold);
  letter-spacing: 0.15em; text-transform: uppercase; opacity: 0.7; margin-bottom: 6px;
}
.preserv-value {
  font-family: var(--f-display); font-size: 32px;
  color: #fff; line-height: 1.1; margin-bottom: 8px;
}
.preserv-desc { font-size: 13.5px; color: var(--text-light); line-height: 1.6; }

/* ─── Responsive (Fusion Bonding) ─── */
@media (max-width: 900px) {
  .compat-inner, .preserv-inner { grid-template-columns: 1fr; gap: 48px; }
  .compat-scroll .compat-header-row,
  .compat-scroll .compat-row { min-width: 520px; }
  .moments-grid { grid-template-columns: 1fr; }
  .demo-sequence { grid-template-columns: 1fr 1fr; }
  .peel-visual { height: auto; }
}
@media (max-width: 560px) {
  .demo-sequence { grid-template-columns: 1fr; }
}


/* ═══════════════════════════════════════
   SHARED FEATURE — Colour Engineering Styles
   ═══════════════════════════════════════ */

/* ─── Hero Palette Interactive ─── */
.palette-visual {
  margin-top: 80px; width: 100%; max-width: 780px;
  position: relative;
}
.car-preview-wrap {
  width: 100%; max-width: 560px; margin: 0 auto 40px;
  background: linear-gradient(180deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.01) 100%);
  border: 1px solid rgba(200,165,92,0.1);
  border-radius: 12px;
  position: relative; overflow: hidden;
}
.car-preview {
  width: 100%;
  position: relative; overflow: hidden;
  border-radius: 12px 12px 0 0;
  background: #fff;
  padding-top: 48px;
}
.car-preview img {
  width: 100%; height: auto;
  object-fit: contain; display: block;
  transition: opacity 0.45s cubic-bezier(.22,1,.36,1);
}
.car-preview .finish-overlay {
  position: absolute; inset: 0; pointer-events: none;
  transition: all 0.5s cubic-bezier(.22,1,.36,1);
  border-radius: 12px 12px 0 0;
}
.car-preview .finish-overlay.stealth {
  background: rgba(0,0,0,0.12);
  box-shadow: inset 0 0 60px rgba(0,0,0,0.15);
}
.car-preview .finish-overlay .matte-grain {
  position: absolute; inset: 0; opacity: 0;
  transition: opacity 0.5s;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.06'/%3E%3C/svg%3E");
}
.car-preview .finish-overlay.stealth .matte-grain { opacity: 1; }
.car-finish-meta { padding: 20px 28px; }
.car-finish-name {
  font-family: var(--f-mono); font-size: 11px;
  color: var(--gold); letter-spacing: 0.2em; text-transform: uppercase;
}
.car-finish-value {
  margin-top: 8px;
  font-family: var(--f-display); font-size: 22px; color: #fff;
}

.palette-grid {
  display: flex; gap: 10px;
  max-width: 100%; margin: 2.5% auto 0;
  overflow-x: auto; scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 4px 0 2px;
}
.palette-grid::-webkit-scrollbar { display: none; }
.palette-swatch {
  width: 38px; height: 38px;
  flex-shrink: 0; cursor: pointer;
  position: relative;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
  border: 2px solid rgba(255,255,255,0.08);
  clip-path: polygon(12% 0%, 100% 0%, 100% 88%, 88% 100%, 0% 100%, 0% 12%);
}
.palette-swatch:hover {
  transform: scale(1.12); border-color: var(--gold);
  box-shadow: 0 6px 24px rgba(0,0,0,0.4);
}
.palette-swatch.active {
  border-color: var(--gold);
  box-shadow: 0 0 0 2px rgba(200,165,92,0.3), 0 8px 32px rgba(0,0,0,0.5);
  transform: scale(1.08);
}

.scroll-hint-host:has(.palette-grid) + .h-scroll-bar.is-on {
  margin-top: 8px;
}
.finish-toggle-hero {
  margin-top: 28px;
  display: inline-flex; background: rgba(0,0,0,0.25);
  border: 1px solid rgba(200,165,92,0.2);
  border-radius: 999px; padding: 4px; gap: 2px;
}
.finish-btn {
  padding: 10px 24px; background: transparent; border: none;
  color: rgba(255,255,255,0.5);
  font-family: var(--f-mono); font-size: 11px;
  letter-spacing: 0.18em; text-transform: uppercase;
  cursor: pointer; border-radius: 999px;
  transition: all 0.3s; font-weight: 500;
}
.finish-btn.active {
  background: var(--gold); color: var(--navy);
  box-shadow: 0 2px 12px rgba(200,165,92,0.3);
}

/* ─── Three Coverage Systems ─── */
section.systems { padding: 160px 32px; background: var(--navy); }
.systems-header {
  max-width: 820px; margin: 0 auto 80px; text-align: center;
}
.systems-header .section-headline { color: #fff; }
.systems-header .section-subhead {
  color: var(--text-light); margin: 0 auto; text-align: center;
}
.systems-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.systems-grid-2 {
  max-width: 900px;
  grid-template-columns: repeat(2, 1fr);
}
.system-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(200,165,92,0.1);
  border-radius: 12px; overflow: hidden;
  transition: all 0.4s ease;
}
.system-card:hover {
  border-color: rgba(200,165,92,0.3);
  transform: translateY(-4px);
}
.system-visual {
  height: 220px; position: relative;
  background: linear-gradient(135deg, var(--navy-mid) 0%, var(--navy-deep) 100%);
  overflow: hidden;
}
.system-visual img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
}
.system-content { padding: 32px 28px; }
.system-counter {
  font-family: var(--f-mono); font-size: 11px;
  color: var(--gold); opacity: 0.5; margin-bottom: 12px;
  letter-spacing: 0.1em;
}
.system-title {
  font-family: var(--f-display); font-size: 26px;
  color: #fff; margin: 0 0 16px; line-height: 1.2;
}
.system-desc {
  font-size: 14.5px; color: var(--text-light); line-height: 1.75;
}

/* ─── Finish Selector ─── */
section.finish-selector {
  padding: 160px 32px;
  background: var(--warm-white); color: var(--navy);
}
.fs-inner { max-width: 1200px; margin: 0 auto; }
.fs-header {
  text-align: center; max-width: 820px; margin: 0 auto 64px;
}
.fs-header .section-headline { color: var(--navy); }
.fs-header .section-subhead {
  color: var(--text-body); margin: 0 auto; text-align: center;
}
.fs-tabs {
  display: flex; justify-content: center; gap: 4px;
  margin-bottom: 48px; padding: 4px;
  background: rgba(10,22,40,0.04);
  border-radius: 999px; width: fit-content;
  margin-left: auto; margin-right: auto;
}
.fs-tab {
  padding: 14px 32px; background: transparent; border: none;
  color: var(--text-muted);
  font-family: var(--f-mono); font-size: 11px;
  letter-spacing: 0.18em; text-transform: uppercase;
  cursor: pointer; border-radius: 999px;
  transition: all 0.3s; font-weight: 600;
}
.fs-tab.active {
  background: var(--navy); color: var(--gold);
}
.fs-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.fs-card {
  background: #fff; border-radius: 12px; overflow: hidden;
  border: 1px solid rgba(10,22,40,0.06);
  transition: all 0.4s cubic-bezier(.22,1,.36,1);
}
.fs-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: 0 12px 40px rgba(10,22,40,0.08);
}
.fs-swatch {
  aspect-ratio: 4 / 3; width: 100%;
  object-fit: cover; display: block;
}
.fs-meta { padding: 20px 18px; }
.fs-code {
  font-family: var(--f-mono); font-size: 10px;
  color: var(--gold); letter-spacing: 0.12em;
  margin-bottom: 6px; opacity: 0.8;
}
.fs-name {
  font-family: var(--f-display); font-size: 18px;
  color: var(--navy); margin-bottom: 4px; line-height: 1.2;
}
.fs-family {
  font-size: 11px; color: var(--text-muted); letter-spacing: 0.05em;
}

/* ─── UV Fade Curve ─── */
section.uv-curve {
  padding: 160px 32px;
  background: var(--warm-white); color: var(--navy);
}
.uv-inner { max-width: 1200px; margin: 0 auto; }
.uv-header {
  text-align: center; max-width: 820px; margin: 0 auto 80px;
}
.uv-header .section-headline { color: var(--navy); }
.uv-header .section-subhead {
  color: var(--text-body); margin: 0 auto; text-align: center;
}
.uv-chart {
  background: #fff; border-radius: 12px;
  padding: 56px 48px;
  box-shadow: 0 2px 40px rgba(10,22,40,0.06);
  position: relative;
}
.uv-legend {
  display: flex; gap: 32px; margin-bottom: 24px; flex-wrap: wrap;
}
.uv-item {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--navy); font-weight: 500;
}
.uv-line { width: 24px; height: 3px; border-radius: 2px; }
.uv-line.sppf { background: var(--gold); }
.uv-line.factory { background: var(--fade-amber); }
.uv-line.vinyl { background: #9AA8B8; }
.uv-svg-wrap {
  width: 100%; height: 400px; position: relative;
  margin-top: 24px; border-radius: 8px; overflow: hidden;
}
.uv-svg-wrap img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
}
.uv-x-labels {
  display: grid; grid-template-columns: repeat(5, 1fr);
  margin-top: 12px; padding-left: 60px; padding-right: 20px;
}
.uv-x-labels span {
  font-family: var(--f-mono); font-size: 10px;
  color: var(--text-muted); text-align: center; letter-spacing: 0.05em;
}

/* ─── Colour Stack Viz ─── */
.colour-stack-viz {
  position: relative; width: 100%; max-width: 560px;
  aspect-ratio: 1/0.9; margin: 0 auto;
  border-radius: 12px; overflow: hidden;
}
.colour-stack-viz img {
  width: 100%; height: auto;
  object-fit: contain; display: block;
}
.stack-legend { margin-top: 40px; max-width: 560px; }
.stack-legend-item {
  display: grid; grid-template-columns: 20px 1fr auto;
  gap: 16px; align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid rgba(10,22,40,0.06);
}
.stack-legend-item:last-child { border-bottom: none; }

/* ─── Practice Icon (img variant) ─── */
.practice-icon img {
  width: 24px; height: 24px;
  display: block; object-fit: contain;
}

/* ─── Expression Section ─── */
section.expression {
  padding: 160px 32px;
  background: linear-gradient(175deg, var(--navy-mid) 0%, var(--navy) 100%);
}
.expr-inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.expr-inner .section-headline { color: #fff; }
.expr-inner .section-subhead { color: var(--text-light); }
.expr-quote {
  font-family: var(--f-display); font-size: 22px;
  line-height: 1.6; font-style: italic; color: #fff;
  margin-top: 32px; padding-left: 24px;
  border-left: 2px solid var(--gold);
}
.expr-stack { display: flex; flex-direction: column; gap: 4px; }
.expr-row {
  padding: 24px 0;
  border-bottom: 1px solid rgba(200,165,92,0.1);
}
.expr-row:last-child { border-bottom: none; }
.expr-label {
  font-family: var(--f-mono); font-size: 10px;
  color: var(--gold); letter-spacing: 0.15em;
  text-transform: uppercase; opacity: 0.7; margin-bottom: 6px;
}
.expr-value {
  font-family: var(--f-display); font-size: 32px;
  color: #fff; line-height: 1.1; margin-bottom: 8px;
}
.expr-desc {
  font-size: 13.5px; color: var(--text-light); line-height: 1.6;
}

/* ─── Responsive (Colour Engineering) ─── */
@media (max-width: 900px) {
  .expr-inner { grid-template-columns: 1fr; gap: 48px; }
  .systems-grid,
  .systems-grid-2 { grid-template-columns: 1fr; }
  .fs-grid { grid-template-columns: repeat(2, 1fr); }
  .palette-grid { grid-template-columns: repeat(5, 1fr); }
}
@media (max-width: 560px) {
  .fs-grid { grid-template-columns: 1fr 1fr; }
  .palette-grid { grid-template-columns: repeat(4, 1fr); }
  .uv-chart { padding: 32px 20px; }
}

/* ═══ SECTION ALTERNATION UTILITIES ═══
   Add .sec-alt-dark or .sec-alt-light to any <section>
   to override its default background for alternation
   ═══════════════════════════════════════ */

.sec-alt-dark {
  background: var(--navy) !important;
}
.sec-alt-dark.contexts .section-headline { color: #fff; }
.sec-alt-dark.contexts .section-subhead { color: var(--text-light); }
.sec-alt-dark.contexts .section-label { color: var(--gold); }
.sec-alt-dark.contexts .ap-title { color: #fff; }
.sec-alt-dark.contexts .ap-desc { color: var(--text-light); }
.sec-alt-dark.contexts .adaptive-points li { border-color: rgba(200,165,92,0.12); }
.sec-alt-light {
  background: var(--warm-white) !important;
}

/* ─── ADAPTIVE → dark ─── */
.sec-alt-dark.adaptive .section-headline { color: #fff; }
.sec-alt-dark.adaptive .section-subhead { color: var(--text-light); }
.sec-alt-dark.adaptive .section-label { color: var(--gold); }
.sec-alt-dark.adaptive .ap-title { color: #fff; }
.sec-alt-dark.adaptive .ap-desc { color: var(--text-light); }
.sec-alt-dark.adaptive .adaptive-points li { border-color: rgba(200,165,92,0.08); }
.sec-alt-dark.adaptive .zone-item span { color: var(--text-light); }

/* ─── BUILDUP → light ─── */
.sec-alt-light.buildup .section-headline { color: var(--navy); }
.sec-alt-light.buildup .section-subhead { color: var(--text-body); }
.sec-alt-light.buildup .buildup-stage {
  background: #fff;
  border-color: rgba(10,22,40,0.06);
  box-shadow: 0 2px 40px rgba(10,22,40,0.04);
}
.sec-alt-light.buildup .buildup-stage:hover {
  border-color: var(--gold);
  box-shadow: 0 12px 40px rgba(10,22,40,0.08);
}
.sec-alt-light.buildup .buildup-visual {
  background: linear-gradient(135deg, #f4f2ed 0%, #ebe7dd 100%);
}
.sec-alt-light.buildup .buildup-title { color: var(--navy); }
.sec-alt-light.buildup .buildup-desc { color: var(--text-body); }
.sec-alt-light.buildup .buildup-counter { color: var(--gold); }
.sec-alt-light.buildup .stack-base { background: #ddd8cf; border-color: rgba(10,22,40,0.08); }
.sec-alt-light.buildup .stack-paint { background: #c8c2b6; }
.sec-alt-light.buildup .stack-spf {
  background: linear-gradient(90deg, rgba(200,165,92,0.5), rgba(200,165,92,0.25));
  border-color: rgba(200,165,92,0.4);
}

/* ─── TIMELINE → dark ─── */
.sec-alt-dark.timeline-section .section-headline { color: #fff; }
.sec-alt-dark.timeline-section .section-subhead { color: var(--text-light); }
.sec-alt-dark.timeline-section .timeline-chart {
  background: rgba(255,255,255,0.04);
  box-shadow: none;
  border: 1px solid rgba(200,165,92,0.1);
}
.sec-alt-dark.timeline-section .tl-legend-item { color: rgba(255,255,255,0.7); }
.sec-alt-dark.timeline-section .tl-label { color: var(--gold); opacity: 0.7; }
.sec-alt-dark.timeline-section .tl-progress { background: rgba(255,255,255,0.06); }
.sec-alt-dark.timeline-section .tl-progress .tag-inline {
  background: rgba(10,22,40,0.7);
  color: #fff;
}
.sec-alt-dark.timeline-section .tl-years span { color: rgba(255,255,255,0.35); }

/* ─── IN-PRACTICE → light ─── */
.sec-alt-light.in-practice .section-headline { color: var(--navy); }
.sec-alt-light.in-practice .section-subhead { color: var(--text-body); }
.sec-alt-light.in-practice .practice-card {
  background: #fff;
  border-color: rgba(10,22,40,0.06);
}
.sec-alt-light.in-practice .practice-card:hover {
  background: #fff;
  border-color: var(--gold);
}
.sec-alt-light.in-practice .practice-icon {
  background: rgba(200,165,92,0.06);
}
.sec-alt-light.in-practice .practice-title { color: var(--navy); }
.sec-alt-light.in-practice .practice-desc { color: var(--text-body); }
.sec-alt-light.in-practice .practice-result { border-top-color: rgba(200,165,92,0.15); }

/* ─── ENVIRONMENTAL → light ─── */
.sec-alt-light.environmental .section-headline { color: var(--navy); }
.sec-alt-light.environmental .section-subhead { color: var(--text-body); }
.sec-alt-light.environmental .section-label { color: var(--gold); }
.sec-alt-light.environmental .env-quote { color: var(--navy); }
.sec-alt-light.environmental .env-impact-value { color: var(--navy); }
.sec-alt-light.environmental .env-impact-desc { color: var(--text-body); }
.sec-alt-light.environmental .env-impact-row { border-bottom-color: rgba(10,22,40,0.08); }

/* ─── MOTORSPORT → light ─── */
.sec-alt-light.motorsport {
  background: var(--warm-white) !important;
}
.sec-alt-light.motorsport .section-headline { color: var(--navy); }
.sec-alt-light.motorsport .section-subhead { color: var(--text-body); }
.sec-alt-light.motorsport .section-label { color: var(--gold); }
.sec-alt-light.motorsport .ms-quote { color: var(--navy); }
.sec-alt-light.motorsport .ms-value { color: var(--navy); }
.sec-alt-light.motorsport .ms-desc { color: var(--text-body); }
.sec-alt-light.motorsport .ms-row { border-bottom-color: rgba(10,22,40,0.08); }

/* ─── STRESS CHART → dark ─── */
.sec-alt-dark.stress-chart-section {
  background: var(--navy) !important;
}
.sec-alt-dark.stress-chart-section .section-headline { color: #fff; }
.sec-alt-dark.stress-chart-section .section-subhead { color: var(--text-light); }
.sec-alt-dark.stress-chart-section .comp-card {
  background: rgba(255,255,255,0.03);
  border-color: rgba(200,165,92,0.1);
  box-shadow: none;
}
.sec-alt-dark.stress-chart-section .comp-card:hover {
  border-color: rgba(200,165,92,0.3);
}
.sec-alt-dark.stress-chart-section .comp-title { color: #fff; }
.sec-alt-dark.stress-chart-section .comp-metric-label { color: var(--text-light); }
.sec-alt-dark.stress-chart-section .comp-metric-value { color: #fff; }
.sec-alt-dark.stress-chart-section .comp-metric {
  border-bottom-color: rgba(200,165,92,0.08);
}
.sec-alt-dark.stress-chart-section .comp-viz {
  background: linear-gradient(135deg, var(--navy-mid), var(--navy-deep));
}

/* ─── ANATOMY → dark ─── */
.sec-alt-dark.anatomy {
  background: var(--navy) !important;
}
.sec-alt-dark.anatomy .section-headline { color: #fff; }
.sec-alt-dark.anatomy .section-subhead { color: var(--text-light); }
.sec-alt-dark.anatomy .section-label { color: var(--gold); }
.sec-alt-dark.anatomy .legend-name { color: #fff; }
.sec-alt-dark.anatomy .legend-spec { color: var(--text-light); }
.sec-alt-dark.anatomy .surface-legend-item {
  border-bottom-color: rgba(200,165,92,0.08);
}

/* ─── RENEWAL STAGES → light ─── */
.sec-alt-light.renewal-stages {
  background: var(--warm-white) !important;
}
.sec-alt-light.renewal-stages .section-headline { color: var(--navy); }
.sec-alt-light.renewal-stages .section-subhead { color: var(--text-body); }
.sec-alt-light.renewal-stages .stage-card {
  background: #fff;
  border-color: rgba(10,22,40,0.06);
  box-shadow: 0 2px 40px rgba(10,22,40,0.04);
}
.sec-alt-light.renewal-stages .stage-card:hover {
  border-color: var(--gold);
  box-shadow: 0 12px 40px rgba(10,22,40,0.08);
}
.sec-alt-light.renewal-stages .stage-visual {
  background: linear-gradient(135deg, #f4f2ed 0%, #ebe7dd 100%);
}
.sec-alt-light.renewal-stages .stage-title { color: var(--navy); }
.sec-alt-light.renewal-stages .stage-desc { color: var(--text-body); }
.sec-alt-light.renewal-stages .stage-counter { color: var(--gold); }

/* ─── RENEWAL ZONES → dark ─── */
.sec-alt-dark.renewal-zones {
  background: var(--navy) !important;
}
.sec-alt-dark.renewal-zones .section-headline { color: #fff; }
.sec-alt-dark.renewal-zones .section-subhead { color: var(--text-light); }
.sec-alt-dark.renewal-zones .section-label { color: var(--gold); }
.sec-alt-dark.renewal-zones .ap-title { color: #fff; }
.sec-alt-dark.renewal-zones .ap-desc { color: var(--text-light); }
.sec-alt-dark.renewal-zones .adaptive-points li {
  border-bottom-color: rgba(200,165,92,0.08);
}

/* ─── PRESERVATION → light ─── */
.sec-alt-light.preservation {
  background: var(--warm-white) !important;
}
.sec-alt-light.preservation .section-headline { color: var(--navy); }
.sec-alt-light.preservation .section-subhead { color: var(--text-body); }
.sec-alt-light.preservation .section-label { color: var(--gold); }
.sec-alt-light.preservation .preserv-quote { color: var(--navy); }
.sec-alt-light.preservation .preserv-value { color: var(--navy); }
.sec-alt-light.preservation .preserv-desc { color: var(--text-body); }
.sec-alt-light.preservation .preserv-row { border-bottom-color: rgba(10,22,40,0.08); }

/* ─── UV CURVE → dark ─── */
.sec-alt-dark.uv-curve {
  background: var(--navy) !important;
}
.sec-alt-dark.uv-curve .section-headline { color: #fff; }
.sec-alt-dark.uv-curve .section-subhead { color: var(--text-light); }
.sec-alt-dark.uv-curve .uv-chart {
  background: rgba(255,255,255,0.03);
  box-shadow: none;
  border: 1px solid rgba(200,165,92,0.1);
}
.sec-alt-dark.uv-curve .uv-item { color: rgba(255,255,255,0.7); }
.sec-alt-dark.uv-curve .uv-svg-wrap {
  background: linear-gradient(135deg, var(--navy-mid), var(--navy-deep));
}
.sec-alt-dark.uv-curve .uv-x-labels span { color: rgba(255,255,255,0.35); }

/* ─── EXPRESSION → light ─── */
.sec-alt-light.expression {
  background: var(--warm-white) !important;
}
.sec-alt-light.expression .section-headline { color: var(--navy); }
.sec-alt-light.expression .section-subhead { color: var(--text-body); }
.sec-alt-light.expression .section-label { color: var(--gold); }
.sec-alt-light.expression .expr-quote { color: var(--navy); }
.sec-alt-light.expression .expr-value { color: var(--navy); }
.sec-alt-light.expression .expr-desc { color: var(--text-body); }
.sec-alt-light.expression .expr-row { border-bottom-color: rgba(10,22,40,0.08); }