/* ── A11y: focus-visible across all interactive elements ── */
:where(a, button, [tabindex], [data-anat-action], .nav-theme):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}
/* Skip-to-main link (visually hidden until focused) */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 200;
  background: var(--cyan);
  color: var(--navy);
  padding: 10px 16px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
}
.skip-link:focus { left: 8px; }

/* ──────────────────────────────────────────────────────────────────
   CONFORMA — Product page design system
   Used by /cooling, /rapid, /smart
   Engineering register · matches conformalcooling.info aesthetic
   Supports DARK (default) + LIGHT modes via [data-theme="light"]
   Engineering visuals (topology renders) stay dark in both modes —
   they're framed as "windows into engineering" regardless of theme.
   ────────────────────────────────────────────────────────────────── */

:root,
[data-theme="dark"] {
  /* ── Dark surfaces (matches splash + identity) ── */
  --bg:           #020C1B;
  --bg-soft:      #071428;
  --bg-sunken:    #020C1B;
  --bg-elevated:  #0D1F3C;

  /* ── Brand (same hex in both modes) ── */
  --cyan:        #06C5D9;
  --sky:         #0EA5E9;
  --sky-l:       #38BDF8;
  --navy:        #020C1B;
  --navy-2:      #071428;

  /* ── Type tones (light text on dark) ── */
  --text:        #F0F6FF;
  --text-2:      rgba(240, 246, 255, 0.70);
  --text-3:      rgba(240, 246, 255, 0.45);
  --text-4:      rgba(240, 246, 255, 0.25);

  /* ── Lines ── */
  --line:        rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.18);
  --line-cyan:   rgba(6, 197, 217, 0.30);

  /* ── Ambient grid colour (subtle backdrop) ── */
  --grid:        rgba(255, 255, 255, 0.025);

  /* ── Extended palette — status & data visualisation ── */
  --amber:       #F59E0B;   /* heat / warnings */
  --amber-soft:  rgba(245, 158, 11, 0.15);
  --red:         #EF4444;   /* critical / hot-spot */
  --red-soft:    rgba(239, 68, 68, 0.15);
  --green:       #10B981;   /* active programs / ok */
  --green-soft:  rgba(16, 185, 129, 0.15);
  --slate:       #64748B;   /* charts / secondary text */
  --slate-soft:  rgba(100, 116, 139, 0.15);

  /* ── Engineering frames — ALWAYS DARK in both modes ── */
  --frame-bg:        #020C1B;
  --frame-bg-soft:   #0D1F3C;
  --frame-border:    rgba(255, 255, 255, 0.08);
  --frame-text:      #F0F6FF;
  --frame-text-2:    rgba(240, 246, 255, 0.70);
  --frame-text-3:    rgba(240, 246, 255, 0.45);

  /* ── Motion ── */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 220ms;
  --dur-base: 600ms;
  --dur-slow: 900ms;

  /* ── Space ── */
  --sp1: 4px;  --sp2: 8px;  --sp3: 12px; --sp4: 16px;
  --sp5: 24px; --sp6: 32px; --sp7: 48px; --sp8: 64px;
  --sp9: 96px; --sp10: 128px; --sp11: 160px;

  /* ── Container ── */
  --container: 1240px;
  --container-narrow: 880px;

  color-scheme: dark;
}

/* ── LIGHT mode overrides ── */
[data-theme="light"] {
  --bg:           #FFFFFF;
  --bg-soft:      #F8FAFC;
  --bg-sunken:    #F1F5F9;
  --bg-elevated:  #FFFFFF;

  --text:         #020C1B;
  --text-2:       #475569;
  --text-3:       #94A3B8;
  --text-4:       #CBD5E1;

  --line:         #E2E8F0;
  --line-strong:  #CBD5E1;
  --line-cyan:    rgba(6, 197, 217, 0.45);

  --grid:         rgba(2, 12, 27, 0.04);

  /* engineering frames stay dark — variables unchanged */
  color-scheme: light;
}

/* ── Section background overrides in light mode ── */
[data-theme="light"] .s-hero {
  background:
    radial-gradient(ellipse 80% 50% at 50% 25%, rgba(6,197,217,0.08), transparent 60%),
    var(--bg);
}
[data-theme="light"] .s-cta {
  /* CTA stays dark — the "brand voice" moment in both themes */
  background:
    radial-gradient(ellipse 60% 50% at 50% 50%, rgba(6,197,217,0.10), transparent 70%),
    var(--frame-bg);
  color: var(--frame-text);
}
[data-theme="light"] .s-cta .t-h1 { color: var(--frame-text); }
[data-theme="light"] .s-cta .t-lead { color: var(--frame-text-2); }

/* Cards get a subtle shadow in light mode for depth */
[data-theme="light"] .process-step,
[data-theme="light"] .vs-card {
  background: var(--bg);
  box-shadow: 0 4px 12px rgba(2,12,27,0.04), 0 1px 3px rgba(2,12,27,0.06);
}
[data-theme="light"] .vs-card.is-better {
  box-shadow: 0 8px 24px rgba(6,197,217,0.10), 0 1px 3px rgba(2,12,27,0.06);
}

/* Outline button in light mode */
[data-theme="light"] .btn--outline {
  color: var(--text);
  border-color: var(--line-strong);
}
[data-theme="light"] .btn--outline:hover {
  background: rgba(2,12,27,0.04);
  border-color: var(--cyan);
}
/* CTA buttons inside the always-dark CTA section keep dark-mode treatment */
[data-theme="light"] .s-cta .btn--outline {
  color: var(--frame-text);
  border-color: rgba(255,255,255,0.25);
}
[data-theme="light"] .s-cta .btn--outline:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--cyan);
}

/* Footer in light mode */
[data-theme="light"] .foot-light {
  background: var(--bg);
  color: var(--text-3);
}
[data-theme="light"] .foot-light a { color: var(--text-2); }
[data-theme="light"] .foot-light a:hover { color: var(--cyan); }

/* Nav links in light mode */
[data-theme="light"] .nav-brand .wm-text { color: var(--text); }
[data-theme="light"] .nav-brand svg path { stroke: var(--text); }
[data-theme="light"] .nav-brand svg path:last-of-type,
[data-theme="light"] .nav-brand svg circle { /* keep cyan accents */ }
[data-theme="light"] .nav-links a { color: var(--text-3); }
[data-theme="light"] .nav-links a:hover,
[data-theme="light"] .nav-links a.is-active { color: var(--text); }
[data-theme="light"] .nav-cta {
  background: var(--text);
  color: var(--bg);
}
[data-theme="light"] .nav-cta:hover { background: var(--cyan); color: var(--text); }

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; }

body {
  font-family: 'Outfit', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'kern', 'liga';
  transition: background-color 280ms var(--ease-out),
              color 280ms var(--ease-out);
}

/* ── Ambient grid backdrop (very subtle, behind everything) ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 0;
  transition: background-image 280ms var(--ease-out);
}
body > * { position: relative; z-index: 1; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp6);
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--sp6);
}

/* ────────────────────────────────────────────────────────────────
   TYPE
   ──────────────────────────────────────────────────────────────── */
.t-display {
  font-size: clamp(56px, 8vw, 120px);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--text);
}
.t-display em {
  font-style: normal;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--sky) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.t-h1 {
  font-size: clamp(40px, 6vw, 80px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.025em;
}
.t-h2 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
}
.t-h3 {
  font-size: clamp(22px, 2.5vw, 32px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text);
}
.t-lead {
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 400;
  line-height: 1.55;
  color: var(--text-2);
}
.t-body { font-size: 17px; line-height: 1.65; color: var(--text-2); }
.t-small { font-size: 14px; line-height: 1.55; color: var(--text-2); }
.t-micro {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}
.t-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: var(--sp3);
}
.t-num { font-feature-settings: 'tnum' 1; font-variant-numeric: tabular-nums; }

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--sky-l); }

/* ────────────────────────────────────────────────────────────────
   NAV (theme-aware)
   ──────────────────────────────────────────────────────────────── */
.nav-light {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(2, 12, 27, 0.80);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
  padding: var(--sp4) 0;
  transition: background-color 280ms var(--ease-out),
              border-color 280ms var(--ease-out);
}
[data-theme="light"] .nav-light {
  background: rgba(255, 255, 255, 0.85);
}

/* ── Theme toggle button (sun/moon) ── */
.nav-theme {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--text-2);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.nav-theme:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(6,197,217,0.06);
}
.nav-theme:active { transform: scale(0.94); }
.nav-theme svg { width: 16px; height: 16px; }
.nav-theme .icon-sun { display: none; }
.nav-theme .icon-moon { display: block; }
[data-theme="light"] .nav-theme .icon-sun { display: block; }
[data-theme="light"] .nav-theme .icon-moon { display: none; }

/* ── Right-side group: theme toggle + CTA together ── */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--sp3);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp6);
}
.nav-brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.nav-brand .wm-text {
  font-size: 18px; font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--text);
}
.nav-links { display: flex; gap: var(--sp6); align-items: center; }
.nav-links a {
  font-size: 14px; font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.01em;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav-links a:hover, .nav-links a.is-active { color: var(--text); }
.nav-cta {
  font-size: 13px; font-weight: 600;
  padding: 8px 16px; border-radius: 8px;
  background: var(--cyan); color: var(--navy);
  letter-spacing: 0.01em;
  transition: background var(--dur-fast) var(--ease-out);
}
.nav-cta:hover { background: var(--sky-l); color: var(--navy); }

/* ────────────────────────────────────────────────────────────────
   01 — HERO (dark, stacked, image-dominant)
   ──────────────────────────────────────────────────────────────── */
.s-hero {
  padding: var(--sp10) 0 var(--sp9);
  background:
    radial-gradient(ellipse 80% 50% at 50% 25%, rgba(6,197,217,0.12), transparent 60%),
    var(--bg);
  position: relative;
  overflow: hidden;
}

/* ── Stacked variant — centred head, full-width image, sub-foot ── */
.s-hero--stacked .s-hero__head {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
  margin-bottom: var(--sp9);
}
.s-hero--stacked .s-hero__head .t-eyebrow { margin-bottom: var(--sp5); }
.s-hero--stacked .s-hero__head h1 { margin-bottom: var(--sp6); }
.s-hero--stacked .s-hero__head .t-lead { max-width: 720px; margin: 0 auto; }

.s-hero__image-wide {
  /* DOMINANT visual element — full container, 16:9 (matches topology renders)
     ALWAYS DARK — engineering "window" in both themes */
  aspect-ratio: 16 / 9;
  width: 100%;
  background:
    radial-gradient(ellipse 70% 50% at 50% 50%, rgba(6,197,217,0.12), transparent 70%),
    var(--frame-bg-soft);
  border-radius: 24px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--frame-border);
  box-shadow: 0 40px 80px -30px rgba(0,0,0,0.7),
              0 0 0 1px rgba(6,197,217,0.05);
  margin-bottom: var(--sp8);
}
.s-hero__image-wide .hero-photo {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  position: absolute; inset: 0;
}

/* Bottom-right engineering spec strip on hero image */
.hero-spec-strip {
  position: absolute;
  bottom: var(--sp5);
  right: var(--sp5);
  z-index: 3;
  display: flex;
  align-items: center;
  gap: var(--sp3);
  background: rgba(2, 12, 27, 0.65);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid var(--line);
  font-family: 'Outfit', sans-serif;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-2);
  letter-spacing: 0.04em;
  font-feature-settings: 'tnum' 1;
}
.hero-spec-strip .dot { color: var(--text-4); }

/* Sub-foot below image: short summary + CTA group, two columns */
.s-hero__foot {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: var(--sp8);
  align-items: center;
  max-width: 1100px;
  margin: 0 auto var(--sp8);
}
.s-hero__foot .t-body { color: var(--text-2); max-width: 520px; }
.s-hero__cta {
  display: flex;
  gap: var(--sp3);
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* Old side-by-side hero (kept as fallback in case .s-hero--stacked is removed) */
.s-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: var(--sp9);
  align-items: stretch;
}
.s-hero__copy {
  max-width: 580px;
  display: flex; flex-direction: column; justify-content: center;
  padding: var(--sp7) 0;
}
.s-hero__copy .t-eyebrow { margin-bottom: var(--sp4); }
.s-hero__copy h1 { margin-bottom: var(--sp5); }
.s-hero__copy .t-lead { margin-bottom: var(--sp6); }
.s-hero__copy .t-body { color: var(--text-2); margin-bottom: var(--sp7); max-width: 480px; }
.s-hero__image {
  aspect-ratio: 16 / 9;
  background: var(--bg-elevated);
  border-radius: 20px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  align-self: center;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.5);
}
.s-hero__image img,
.hero-photo {
  width: 100%; height: 100%;
  display: block;
  object-fit: cover;
  position: absolute; inset: 0;
}

.scroll-cue {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 500; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3);
  margin-top: var(--sp7);
}
.scroll-cue::after {
  content: ''; width: 1px; height: 32px;
  background: linear-gradient(180deg, var(--text-3), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}
@keyframes scroll-pulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); transform-origin: top; }
  50%      { opacity: 1; transform: scaleY(1); }
}

/* Engineering title block overlay on the hero image */
.hero-fig-tag {
  /* Sits ON the always-dark hero image — text stays light in both themes */
  position: absolute;
  top: var(--sp5);
  left: var(--sp5);
  z-index: 3;
  pointer-events: none;
  background: rgba(2, 12, 27, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid var(--frame-border);
}
.hero-fig-tag .t-eyebrow { color: var(--cyan); margin-bottom: 2px; }
.hero-fig-tag .subline { color: var(--frame-text-3); font-size: 11px; font-weight: 500; }

.hero-spec-strip {
  /* sits on dark image — stay light text */
  color: var(--frame-text-2) !important;
  border-color: var(--frame-border) !important;
}
.hero-spec-strip .dot { color: var(--frame-text-3) !important; }

.viewer-hint {
  /* sits on dark viewer — stay light */
  color: var(--frame-text-3) !important;
  background: rgba(2,12,27,0.7) !important;
  border-color: var(--frame-border) !important;
}

.vs-image-tag {
  /* sits on dark vs image — stay light */
  color: var(--frame-text-2) !important;
  border-color: var(--frame-border) !important;
}
.vs-card.is-better .vs-image-tag { color: var(--cyan) !important; border-color: var(--line-cyan) !important; }

/* Animated cyan scanline (Apple-Pro accent) */
.hero-scanline {
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(6,197,217,0.85), transparent);
  top: 0;
  animation: scan-vertical 8s ease-in-out infinite;
  pointer-events: none;
  z-index: 2;
}
@keyframes scan-vertical {
  0%, 100% { top: 5%; opacity: 0; }
  10%      { opacity: 1; }
  50%      { top: 95%; opacity: 1; }
  60%      { opacity: 0; }
}

/* ────────────────────────────────────────────────────────────────
   02 — PROOF
   ──────────────────────────────────────────────────────────────── */
.s-proof {
  padding: var(--sp9) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
}
.proof-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp7);
}
.proof-item .proof-num {
  font-size: clamp(48px, 6vw, 80px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  margin-bottom: var(--sp4);
}
.proof-item .proof-label {
  font-size: 15px;
  color: var(--text);
  font-weight: 500;
  margin-bottom: var(--sp2);
}
.proof-item .proof-caption { font-size: 13px; color: var(--text-3); }

/* ────────────────────────────────────────────────────────────────
   03 — 3D VIEWER
   ──────────────────────────────────────────────────────────────── */
.s-viewer { padding: var(--sp10) 0; background: var(--bg); }
.viewer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: var(--sp8);
  align-items: center;
}
.viewer-frame {
  aspect-ratio: 4/3;
  background:
    radial-gradient(ellipse 80% 60% at 50% 50%, rgba(6,197,217,0.10), transparent 70%),
    var(--frame-bg-soft);
  border-radius: 20px;
  border: 1px solid var(--frame-border);
  position: relative;
  overflow: hidden;
}
.viewer-frame model-viewer {
  width: 100%; height: 100%;
  --poster-color: transparent;
}
.viewer-frame .viewer-hint {
  position: absolute;
  bottom: var(--sp5); left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  /* Sits on dark frame → stay light text regardless of theme */
  color: var(--frame-text-2) !important;
  padding: 6px 14px 6px 30px;
  background: rgba(2,12,27,0.85);
  border: 1px solid var(--frame-border);
  border-radius: 20px;
  backdrop-filter: blur(8px);
  /* Cursor-drag glyph */
  background-image: linear-gradient(rgba(2,12,27,0.85), rgba(2,12,27,0.85)),
                    radial-gradient(circle at 14px 50%, var(--cyan) 3px, transparent 4px);
  background-blend-mode: normal;
}
.viewer-frame .viewer-hint::before {
  content: '↻';
  position: absolute;
  left: 11px; top: 50%;
  transform: translateY(-50%);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 600;
}

/* ────────────────────────────────────────────────────────────────
   04 — ANATOMY (two-column, user-controlled explode)
   ──────────────────────────────────────────────────────────────── */
.s-anatomy { padding: var(--sp10) 0; background: var(--bg-soft); }
.anatomy-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: var(--sp8);
  align-items: center;
}
.anatomy-copy { max-width: 540px; }
.anatomy-copy h2 { margin-bottom: var(--sp4); }

.anatomy-stage {
  /* Reasonable square-ish frame — beside the copy, not full-bleed
     ALWAYS DARK in both themes */
  aspect-ratio: 5/4;
  background:
    radial-gradient(ellipse 70% 60% at 50% 50%, rgba(6,197,217,0.06), transparent 70%),
    var(--frame-bg-soft);
  border-radius: 20px;
  border: 1px solid var(--frame-border);
  position: relative;
  overflow: hidden;
}
.anatomy-illustration { padding: 0; min-height: 420px; }
.anatomy-illustration svg {
  width: 100%; height: 100%;
  display: block;
  position: absolute; inset: 0;
}

/* ── Interactive controls ── */
.anatomy-controls {
  display: flex;
  gap: var(--sp3);
  margin-top: var(--sp6);
  flex-wrap: wrap;
}
.anatomy-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp2);
  padding: 10px 16px;
  border-radius: 10px;
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--line-strong);
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
  user-select: none;
}
.anatomy-btn:hover {
  border-color: var(--cyan);
  color: var(--text);
  background: rgba(6,197,217,0.06);
}
.anatomy-btn:active { transform: scale(0.97); }
.anatomy-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  border-color: var(--line);
}
.anatomy-btn:disabled:hover {
  border-color: var(--line);
  color: var(--text-2);
  background: transparent;
}
.anatomy-btn--primary {
  background: var(--cyan);
  color: var(--navy);
  border-color: var(--cyan);
}
.anatomy-btn--primary:hover {
  background: var(--sky-l);
  color: var(--navy);
  border-color: var(--sky-l);
}
.anatomy-btn--primary:disabled {
  background: var(--bg-elevated);
  color: var(--text-3);
  border-color: var(--line);
}

/* ── Component key (right column, below controls) ── */
.anatomy-key {
  list-style: none;
  padding: 0;
  margin-top: var(--sp7);
  display: flex;
  flex-direction: column;
  gap: var(--sp3);
  border-top: 1px solid var(--line);
  padding-top: var(--sp6);
}
.anatomy-key li {
  display: flex;
  align-items: center;
  gap: var(--sp3);
  font-size: 13px;
  color: var(--text-2);
}
.anatomy-key .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

@keyframes flow-channel {
  0%   { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -920; }
}
.flow-channel { animation: flow-channel 8s linear infinite; }

/* ────────────────────────────────────────────────────────────────
   05 — IN CONTEXT
   ──────────────────────────────────────────────────────────────── */
.s-context { padding: var(--sp10) 0; background: var(--bg); }
.context-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: var(--sp8);
  align-items: center;
}
.context-image {
  /* Engineering frame — always dark in both themes */
  aspect-ratio: 16/9;
  background: var(--frame-bg-soft);
  border-radius: 20px;
  border: 1px solid var(--frame-border);
  overflow: hidden;
  position: relative;
}
.context-image img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ────────────────────────────────────────────────────────────────
   06 — vs TRADITIONAL
   ──────────────────────────────────────────────────────────────── */
.s-vs { padding: var(--sp10) 0; background: var(--bg-soft); }
.vs-row {
  margin-top: var(--sp8);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp7);
}
.vs-card {
  padding: var(--sp7);
  border-radius: 20px;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
}
.vs-card .t-eyebrow { color: var(--text-3); }
.vs-card.is-better { background: var(--bg-elevated); border-color: var(--line-cyan); box-shadow: 0 0 0 1px rgba(6,197,217,0.08), 0 20px 40px -20px rgba(6,197,217,0.15); }
.vs-card.is-better .t-eyebrow { color: var(--cyan); }
.vs-card svg { width: 100%; height: auto; margin: var(--sp6) 0; }
.vs-image {
  /* Engineering "window" — always dark */
  position: relative;
  margin: var(--sp6) 0;
  aspect-ratio: 16/9;
  border-radius: 12px;
  overflow: hidden;
  background: var(--frame-bg);
  border: 1px solid var(--frame-border);
}
.vs-image img { width: 100%; height: 100%; object-fit: cover; display: block; }
.vs-image-tag {
  position: absolute;
  bottom: var(--sp3);
  left: var(--sp3);
  background: rgba(2,12,27,0.7);
  backdrop-filter: blur(8px);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-2);
  border: 1px solid var(--line);
}
.vs-card.is-better .vs-image-tag { color: var(--cyan); border-color: var(--line-cyan); }
.vs-card .vs-bullets { list-style: none; padding: 0; display: flex; flex-direction: column; gap: var(--sp3); }
.vs-card .vs-bullets li {
  font-size: 14px; color: var(--text-2);
  padding-left: var(--sp5); position: relative;
}
.vs-card .vs-bullets li::before { content: '—'; position: absolute; left: 0; color: var(--text-3); }
.vs-card.is-better .vs-bullets li::before { color: var(--cyan); }

/* ────────────────────────────────────────────────────────────────
   07 — PROCESS
   ──────────────────────────────────────────────────────────────── */
.s-process { padding: var(--sp10) 0; background: var(--bg); }
.process-row {
  margin-top: var(--sp8);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp6);
}
.process-step {
  padding: var(--sp6);
  border-radius: 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  transition: transform var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out);
}
.process-step:hover {
  transform: translateY(-3px);
  border-color: var(--line-cyan);
}
.process-step .step-num {
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.1em;
  margin-bottom: var(--sp4);
}
.process-step .step-icon {
  width: 56px; height: 56px;
  margin-bottom: var(--sp5);
  color: var(--text);
  overflow: visible;
}
.process-step .step-title {
  font-size: 17px; font-weight: 600;
  color: var(--text); margin-bottom: var(--sp3);
}
.process-step .step-desc { font-size: 13px; color: var(--text-2); line-height: 1.5; }

/* Process icon micro-animations */
@keyframes blink { 0%, 60%, 100% { opacity: 1; } 30%, 90% { opacity: 0; } }
@keyframes draw-stroke { 0% { stroke-dashoffset: 60; } 100% { stroke-dashoffset: 0; } }
@keyframes laser-sweep { 0%, 100% { transform: translateX(-12px); } 50% { transform: translateX(12px); } }
@keyframes insert-drop { 0% { transform: translateY(-12px); } 60% { transform: translateY(2px); } 100% { transform: translateY(0); } }

.process-step .ic-design .design-pin { animation: blink 2.5s ease-in-out infinite; }
.process-step .ic-simulate .sim-curve { stroke-dasharray: 60; stroke-dashoffset: 60; animation: draw-stroke 2.4s ease-out 0.2s forwards infinite; }
.process-step .ic-print .print-laser { transform-origin: 32px 12px; animation: laser-sweep 2.6s ease-in-out infinite; }
.process-step .ic-install .install-insert { transform-origin: center; animation: insert-drop 3s ease-in-out infinite; }
.process-step:hover .ic-design .design-pin { animation-duration: 0.9s; }
.process-step:hover .ic-simulate .sim-curve { animation-duration: 1.1s; }
.process-step:hover .ic-print .print-laser { animation-duration: 1.2s; }
.process-step:hover .ic-install .install-insert { animation-duration: 1.4s; }

/* ────────────────────────────────────────────────────────────────
   08 — SPECS
   ──────────────────────────────────────────────────────────────── */
.s-specs { padding: var(--sp10) 0; background: var(--bg-soft); }
.specs-table {
  margin-top: var(--sp8);
  width: 100%;
  border-collapse: collapse;
  font-feature-settings: 'tnum' 1;
}
.specs-table tr { border-bottom: 1px solid var(--line); }
.specs-table tr:first-child { border-top: 1px solid var(--line); }
.specs-table td { padding: var(--sp5) 0; vertical-align: top; }
.specs-table td:first-child {
  width: 30%;
  color: var(--text-3);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
  padding-right: var(--sp6);
}
.specs-table td:last-child {
  color: var(--text);
  font-size: 17px;
  font-weight: 500;
}

/* ────────────────────────────────────────────────────────────────
   09 — CTA
   ──────────────────────────────────────────────────────────────── */
.s-cta {
  padding: var(--sp10) 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 50%, rgba(6,197,217,0.10), transparent 70%),
    var(--bg);
  color: var(--text);
  text-align: center;
  border-top: 1px solid var(--line);
}
.s-cta .t-eyebrow { color: var(--cyan); }
.s-cta .t-h1 { color: var(--text); margin-bottom: var(--sp5); }
.s-cta .t-lead { color: var(--text-2); margin-bottom: var(--sp8); max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; gap: var(--sp4); justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: var(--sp2);
  padding: 14px 24px; border-radius: 12px;
  font-size: 15px; font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--cyan); color: var(--navy); }
.btn--primary:hover { background: var(--sky-l); color: var(--navy); }
.btn--outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line-strong);
}
.btn--outline:hover { background: rgba(255,255,255,0.05); border-color: var(--cyan); }

/* ────────────────────────────────────────────────────────────────
   FOOTER (dark)
   ──────────────────────────────────────────────────────────────── */
.foot-light {
  padding: var(--sp7) 0;
  border-top: 1px solid var(--line);
  background: var(--bg);
  color: var(--text-3);
  font-size: 13px;
  text-align: center;
}
.foot-light a { color: var(--text-2); }
.foot-light a:hover { color: var(--cyan); }

/* ────────────────────────────────────────────────────────────────
   MOTION
   ──────────────────────────────────────────────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }
[data-reveal-delay="1"] { transition-delay: 80ms; }
[data-reveal-delay="2"] { transition-delay: 160ms; }
[data-reveal-delay="3"] { transition-delay: 240ms; }
[data-reveal-delay="4"] { transition-delay: 320ms; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .scroll-cue::after { animation: none; }
  .hero-scanline { animation: none; opacity: 0; }
  .process-step .step-icon *, .flow-channel { animation: none !important; }
}

/* ────────────────────────────────────────────────────────────────
   RESPONSIVE
   ──────────────────────────────────────────────────────────────── */
@media (max-width: 920px) {
  .s-hero__grid, .viewer-grid, .context-grid, .anatomy-grid { grid-template-columns: 1fr; gap: var(--sp7); }
  .anatomy-copy { max-width: none; }
  .s-hero__copy { max-width: none; }
  .s-hero__foot { grid-template-columns: 1fr; gap: var(--sp5); text-align: center; max-width: 600px; }
  .s-hero__foot .t-body { margin: 0 auto; }
  .s-hero__cta { justify-content: center; }
  .s-hero--stacked .s-hero__head { margin-bottom: var(--sp7); }
  .hero-spec-strip { font-size: 10px; padding: 6px 10px; gap: var(--sp2); }
  .proof-row { grid-template-columns: 1fr; gap: var(--sp6); }
  .vs-row { grid-template-columns: 1fr; }
  .process-row { grid-template-columns: repeat(2, 1fr); }
  .specs-table td { padding: var(--sp4) 0; }
}
@media (max-width: 560px) {
  .process-row { grid-template-columns: 1fr; }
  .container, .container-narrow { padding: 0 var(--sp5); }
  .nav-links { display: none; }
}

/* ────────────────────────────────────────────────────────────────
   PARTNERS & NETWORK SECTION
   Two-card layout — Addpark (featured/larger) + Beta Machining
   ──────────────────────────────────────────────────────────────── */
.s-partners {
  padding: var(--sp10) 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.partner-row {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: var(--sp6);
  margin-top: var(--sp8);
}
.partner-card {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: var(--sp7);
  display: flex;
  flex-direction: column;
  gap: var(--sp4);
  transition: border-color var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.partner-card:hover {
  border-color: var(--line-cyan);
  transform: translateY(-2px);
}
[data-theme="light"] .partner-card {
  box-shadow: 0 4px 12px rgba(2,12,27,0.04), 0 1px 3px rgba(2,12,27,0.06);
}
.partner-card--featured {
  border-color: var(--line-cyan);
  background: linear-gradient(180deg, rgba(6,197,217,0.04) 0%, var(--bg-elevated) 60%);
}
.partner-role {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--cyan);
}
.partner-logo {
  height: 64px;
  display: flex;
  align-items: center;
  margin: var(--sp3) 0;
}
.partner-logo img {
  max-height: 56px;
  max-width: 220px;
  width: auto;
  height: auto;
  object-fit: contain;
  /* Addpark logo ships in dark navy/black — invert it for dark theme */
  filter: invert(1) brightness(1.1);
}
[data-theme="light"] .partner-logo img {
  filter: none;
}
.partner-logo--text {
  align-items: flex-start;
}
.partner-wordmark {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 22px;
  line-height: 1.05;
  letter-spacing: 0.08em;
  color: var(--text);
  font-feature-settings: 'kern';
}
.partner-name {
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}
.partner-desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-2);
  margin: 0;
}
.partner-certs {
  list-style: none;
  padding: 0;
  margin: var(--sp3) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp2);
}
.partner-certs li {
  font-size: 11px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--text-2);
  background: rgba(6,197,217,0.08);
  border: 1px solid var(--line-cyan);
  padding: 6px 10px;
  border-radius: 999px;
}
.partner-link {
  margin-top: auto;
  padding-top: var(--sp4);
  color: var(--cyan);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
.partner-link:hover { color: var(--sky-l); }
.partner-foot {
  margin-top: var(--sp6);
  color: var(--text-3);
  font-style: italic;
  text-align: center;
}

@media (max-width: 920px) {
  .partner-row { grid-template-columns: 1fr; }
}