/* ══════════════════════════════════════════════════════════════════
   Just Komfort — Design B (atrium · slot b)
   Scope: [data-design="b"]  |  Keyframes: jkb- prefix
   Thermal tokens: --thermal-temp (0=cold, 1=warm), --thermal-bg, --thermal-accent
   ══════════════════════════════════════════════════════════════════ */

/* ─── Design-B token block ─────────────────────────────────────── */
[data-design="b"] {
  /* Atrium dark-first base */
  --bg: #08090B;
  --bg-deep: #0E1014;
  --bg-elev: #16181C;
  --ink: #FAFAFA;
  --ink-soft: #C5C8CC;
  --muted: #7A7F86;
  --rule: #1F2228;
  --rule-strong: #2E3138;
  --signal: #9E8CFC;
  --signal-glow: rgba(158, 140, 252, .22);
  --seal: #52C788;
  --amber: #F0B956;
  --critical: #E45A5A;

  /* Thermal tokens — driven by scroll + mode toggle */
  --thermal-temp: 0.15;
  --thermal-cold: #1a4a5e;
  --thermal-warm: #c97a1a;
  --thermal-bg: color-mix(in srgb, #1a4a5e calc((1 - var(--thermal-temp)) * 100%), #c97a1a calc(var(--thermal-temp) * 100%));
  --thermal-accent: color-mix(in srgb, #3ab8d4 calc((1 - var(--thermal-temp)) * 100%), #f0b956 calc(var(--thermal-temp) * 100%));
  --thermal-particle: color-mix(in srgb, rgba(58, 184, 212, 0.7) calc((1 - var(--thermal-temp)) * 100%), rgba(240, 185, 86, 0.7) calc(var(--thermal-temp) * 100%));

  /* Design-b primary (required by contract) */
  --design-b-primary: var(--thermal-accent);

  /* Typography */
  --font-display: "Inter Display", "Söhne", "Helvetica Neue", system-ui, sans-serif;
  --font-body: "Inter", "Söhne", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SF Mono", ui-monospace, monospace;

  /* Spacing */
  --space-tick: 4px;
  --space-em: 8px;
  --space-row: 16px;
  --space-block: 24px;
  --space-pane: 40px;
  --space-bay: 80px;

  /* Motion */
  --dur-tick: 120ms;
  --dur-compile: 320ms;
  --dur-reveal: 520ms;
  --ease-snap: cubic-bezier(.7, 0, .84, 0);
  --ease-compile: cubic-bezier(.22, 1, .36, 1);
  --ease-stream: cubic-bezier(.4, 0, .2, 1);

  /* Radius */
  --radius-tight: 4px;
  --radius-card: 8px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-card: 0 0 0 1px var(--rule);
  --shadow-elev: 0 0 0 1px var(--rule-strong);
  --shadow-signal: 0 0 0 1px var(--signal), 0 0 24px var(--signal-glow);
  --shadow-focus: 0 0 0 2px var(--bg), 0 0 0 4px var(--signal);

  background: var(--bg);
  color: var(--ink-soft);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

[data-design="b"].dq-design * { box-sizing: border-box; }

@media (prefers-color-scheme: light) {
  [data-design="b"] {
    --bg: #FAFAFA; --bg-deep: #F0F0F2; --bg-elev: #FFFFFF;
    --ink: #0A0B0D; --ink-soft: #3A3D44; --muted: #74787E;
    --rule: #E0E1E4; --rule-strong: #C8CACE;
    --signal: #6E56CF; --signal-glow: rgba(110, 86, 207, .18);
  }
}

/* ─── Prevent horizontal scroll ────────────────────────────────── */
[data-design="b"].dq-design,
[data-design="b"] .dq-design {
  max-width: 100%;
  overflow-x: clip;
}
[data-design="b"].dq-design * { min-width: 0; }
[data-design="b"].dq-design img,
[data-design="b"].dq-design svg:not([data-keep-size]) {
  max-width: 100%;
  height: auto;
}

/* ══════════════════════════════════════════════════════════════════
   ELEMENT 1 — Animated minimalist header
   ══════════════════════════════════════════════════════════════════ */
[data-design="b"] .jkb-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--rule);
}

[data-design="b"] .jkb-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-row);
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-row) clamp(14px, 5vw, 40px);
  min-height: 60px;
}

/* Atmospheric layer — slow thermal sweep (H-3: ≥18s) */
[data-design="b"] .jkb-header__sweep {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  opacity: .65;
  background: linear-gradient(90deg, transparent 0 38%, var(--thermal-accent) 50%, transparent 62% 100%);
  background-size: 260% 100%;
  animation: jkb-header-sweep 24s linear infinite;
}

@keyframes jkb-header-sweep {
  from { background-position: 170% 0; }
  to   { background-position: -70% 0; }
}

[data-design="b"] .jkb-logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -.02em;
  color: var(--ink);
  text-decoration: none;
}

/* Hamburger */
[data-design="b"] .jkb-burger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  padding: 0 8px;
  cursor: pointer;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: var(--radius-tight);
  transition: box-shadow var(--dur-tick) var(--ease-compile);
}

[data-design="b"] .jkb-burger:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

[data-design="b"] .jkb-burger__line {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--ink);
  transition: transform var(--dur-tick) var(--ease-snap);
}

[data-design="b"] .jkb-burger[aria-expanded="true"] .jkb-burger__line:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

[data-design="b"] .jkb-burger[aria-expanded="true"] .jkb-burger__line:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .jkb-burger:hover {
    box-shadow: var(--shadow-elev);
  }
}

/* Drawer */
[data-design="b"] .jkb-drawer { position: fixed; inset: 0; z-index: 60; }
[data-design="b"] .jkb-drawer[hidden] { display: none; }

[data-design="b"] .jkb-drawer__scrim {
  position: absolute; inset: 0;
  background: rgba(4, 5, 7, .75);
  opacity: 0;
  transition: opacity 200ms var(--ease-stream);
}

[data-design="b"] .jkb-drawer__pane {
  position: absolute; top: 0; right: 0; height: 100%;
  width: min(480px, 86vw); max-width: 100%;
  background: var(--bg-elev);
  border-left: 1px solid var(--rule-strong);
  padding: var(--space-pane) var(--space-block);
  display: flex; flex-direction: column; gap: var(--space-row);
  transform: translateX(100%);
  transition: transform 220ms var(--ease-compile);
}

[data-design="b"] .jkb-drawer.is-open .jkb-drawer__scrim { opacity: 1; }
[data-design="b"] .jkb-drawer.is-open .jkb-drawer__pane  { transform: none; }

[data-design="b"] .jkb-drawer__crumb {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

[data-design="b"] .jkb-drawer__esc {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  background: none; border: 0;
  padding: 0; cursor: pointer;
}

[data-design="b"] .jkb-navlink {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 500;
  letter-spacing: -.01em;
  color: var(--ink-soft);
  text-decoration: none;
  padding: var(--space-em) 0;
  border-bottom: 1px solid var(--rule);
  transition: color var(--dur-tick) var(--ease-compile);
}

@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .jkb-navlink:hover { color: var(--ink); }
  [data-design="b"] .jkb-navlink:hover::before { content: "/"; color: var(--signal); margin-right: 6px; }
}

[data-design="b"] .jkb-drawer__divider {
  height: 1px;
  background: var(--rule);
  margin: var(--space-em) 0;
}

[data-design="b"] .jkb-drawer__phone {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--thermal-accent);
  text-decoration: none;
  padding: var(--space-em) 0;
  min-height: 44px; display: flex; align-items: center;
}

[data-design="b"] .jkb-drawer__cta {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 500; font-size: 15px;
  color: var(--bg);
  background: var(--ink);
  text-decoration: none;
  padding: 12px 20px;
  border-radius: var(--radius-tight);
  min-height: 44px;
  border: 1px solid var(--rule);
}

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .jkb-header__sweep { animation: none; background-position: 8% 0; }
  [data-design="b"] .jkb-drawer__pane,
  [data-design="b"] .jkb-drawer__scrim { transition: none; }
}

@media (max-width: 390px) {
  [data-design="b"] .jkb-logo { font-size: 16px; }
  [data-design="b"] .jkb-drawer__pane { width: 100vw; }
}

/* ══════════════════════════════════════════════════════════════════
   HERO — thermal backdrop + airflow + content
   ══════════════════════════════════════════════════════════════════ */
[data-design="b"] .jkb-hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--rule);
}

[data-design="b"] .jkb-hero__backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* Thermal gradient overlay — warms with --thermal-temp via scroll */
[data-design="b"] .jkb-hero__thermal {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 120% 80% at 60% 40%,
    var(--thermal-bg) 0%,
    transparent 70%
  );
  opacity: 0.35;
  /* no animation here — driven by JS updating --thermal-temp */
}

/* ══════════════════════════════════════════════════════════════════
   ELEMENT 5 — Airflow signature SVG
   data-mf-role="airflow" lives on the <svg> element
   Particles tinted by --thermal-particle (driven by --thermal-temp)
   ══════════════════════════════════════════════════════════════════ */
[data-design="b"] .jkb-airflow {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
}

/* Duct backbone lines */
[data-design="b"] .jkb-duct {
  stroke: var(--rule-strong);
  stroke-width: 1;
  fill: none;
  opacity: 0.6;
}

/* Vent grilles */
[data-design="b"] .jkb-vent {
  fill: none;
  stroke: var(--rule-strong);
  stroke-width: 1;
  opacity: 0.5;
}

/* Air particles — flowing along ducts, tinted by thermal state */
[data-design="b"] .jkb-particle {
  fill: var(--thermal-particle);
  opacity: 0.9;
}

/* Horizontal flow left-to-right */
[data-design="b"] .jkb-particle--h1a { animation: jkb-flow-right 7s linear infinite; }
[data-design="b"] .jkb-particle--h1b { animation: jkb-flow-right 7s linear infinite; animation-delay: -2.3s; }
[data-design="b"] .jkb-particle--h1c { animation: jkb-flow-right 7s linear infinite; animation-delay: -4.8s; }

/* Horizontal flow right-to-left */
[data-design="b"] .jkb-particle--h2a { animation: jkb-flow-left 9s linear infinite; }
[data-design="b"] .jkb-particle--h2b { animation: jkb-flow-left 9s linear infinite; animation-delay: -4s; }

/* Horizontal flow left-to-right (slow) */
[data-design="b"] .jkb-particle--h3a { animation: jkb-flow-right 11s linear infinite; animation-delay: -5s; }
[data-design="b"] .jkb-particle--h3b { animation: jkb-flow-right 11s linear infinite; animation-delay: -1.5s; }

/* Vertical flow downward */
[data-design="b"] .jkb-particle--v1a { animation: jkb-flow-down 8s linear infinite; }
[data-design="b"] .jkb-particle--v1b { animation: jkb-flow-down 8s linear infinite; animation-delay: -4s; }

/* Vertical flow upward */
[data-design="b"] .jkb-particle--v2a { animation: jkb-flow-up 10s linear infinite; }
[data-design="b"] .jkb-particle--v2b { animation: jkb-flow-up 10s linear infinite; animation-delay: -5s; }

/* Vertical flow downward (slow) */
[data-design="b"] .jkb-particle--v3a { animation: jkb-flow-down 12s linear infinite; animation-delay: -3s; }

@keyframes jkb-flow-right {
  from { transform: translateX(0); opacity: 0; }
  5%   { opacity: 0.9; }
  95%  { opacity: 0.9; }
  to   { transform: translateX(1440px); opacity: 0; }
}

@keyframes jkb-flow-left {
  from { transform: translateX(0); opacity: 0; }
  5%   { opacity: 0.9; }
  95%  { opacity: 0.9; }
  to   { transform: translateX(-1440px); opacity: 0; }
}

@keyframes jkb-flow-down {
  from { transform: translateY(0); opacity: 0; }
  5%   { opacity: 0.9; }
  95%  { opacity: 0.9; }
  to   { transform: translateY(600px); opacity: 0; }
}

@keyframes jkb-flow-up {
  from { transform: translateY(0); opacity: 0; }
  5%   { opacity: 0.9; }
  95%  { opacity: 0.9; }
  to   { transform: translateY(-600px); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .jkb-particle { animation: none; opacity: 0.45; }
  /* Static thermally-tinted airflow frame — not blank */
  [data-design="b"] .jkb-particle--h1a { transform: translateX(360px); }
  [data-design="b"] .jkb-particle--h1b { transform: translateX(720px); }
  [data-design="b"] .jkb-particle--h1c { transform: translateX(1080px); }
  [data-design="b"] .jkb-particle--h2a { transform: translateX(-360px); }
  [data-design="b"] .jkb-particle--h2b { transform: translateX(-720px); }
  [data-design="b"] .jkb-particle--h3a { transform: translateX(480px); }
  [data-design="b"] .jkb-particle--h3b { transform: translateX(960px); }
  [data-design="b"] .jkb-particle--v1a { transform: translateY(150px); }
  [data-design="b"] .jkb-particle--v1b { transform: translateY(300px); }
  [data-design="b"] .jkb-particle--v2a { transform: translateY(-200px); }
  [data-design="b"] .jkb-particle--v2b { transform: translateY(-400px); }
  [data-design="b"] .jkb-particle--v3a { transform: translateY(240px); }
}

/* ─── Hero content ──────────────────────────────────────────────── */
[data-design="b"] .jkb-hero__content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(64px, 10vh, 120px) clamp(14px, 5vw, 40px);
  display: flex;
  flex-direction: column;
  gap: var(--space-block);
  width: 100%;
}

/* Mode toggle — heating↔cooling (design_toggle) */
[data-design="b"] .jkb-mode-toggle {
  display: inline-flex;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-tight);
  overflow: hidden;
  align-self: flex-start;
}

[data-design="b"] .jkb-mode-toggle__btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  min-height: 44px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: color var(--dur-tick) var(--ease-compile),
              background var(--dur-tick) var(--ease-compile);
}

[data-design="b"] .jkb-mode-toggle__btn.is-active {
  color: var(--bg);
  background: var(--thermal-accent);
}

[data-design="b"] .jkb-mode-toggle__btn--heat.is-active {
  background: color-mix(in srgb, #c97a1a 70%, #f0b956);
}

[data-design="b"] .jkb-mode-toggle__btn--cool.is-active {
  background: color-mix(in srgb, #1a4a5e 70%, #3ab8d4);
  color: var(--ink);
}

/* Hero text — ALL opacity:1, never opacity:0 */
[data-design="b"] .jkb-hero__text {
  display: flex;
  flex-direction: column;
  gap: var(--space-em);
  max-width: 680px;
}

[data-design="b"] .jkb-hero__mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
  margin: 0;
  opacity: 1;
}

[data-design="b"] .jkb-hero__headline {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(32px, 6vw, 72px);
  line-height: 1.05;
  letter-spacing: -.025em;
  color: var(--ink);
  margin: 0;
  opacity: 1;
}

[data-design="b"] .jkb-hero__subtitle {
  font-family: var(--font-body);
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--ink-soft);
  line-height: 1.4;
  margin: 0;
  opacity: 1;
}

[data-design="b"] .jkb-hero__proof {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
  margin: 0;
  opacity: 1;
}

/* ══════════════════════════════════════════════════════════════════
   ELEMENT 2 — Animated CTA (funnel-anchor)
   ══════════════════════════════════════════════════════════════════ */
[data-design="b"] .jkb-cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-em);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: -.01em;
  color: var(--bg);
  text-decoration: none;
  background: var(--ink);
  padding: 12px 20px;
  border-radius: var(--radius-tight);
  box-shadow: var(--shadow-card);
  will-change: transform;
  align-self: flex-start;
  min-height: 44px;
  animation: jkb-cta-breath 4.8s var(--ease-stream) infinite;
  transition: transform var(--dur-tick) var(--ease-compile),
              box-shadow var(--dur-tick) var(--ease-compile),
              background var(--dur-tick) var(--ease-compile);
}

@keyframes jkb-cta-breath {
  0%, 100% { box-shadow: 0 0 0 1px var(--rule), 0 0 0 0 var(--signal-glow); }
  50%       { box-shadow: 0 0 0 1px var(--rule), 0 0 22px 0 var(--signal-glow); }
}

[data-design="b"] .jkb-cta__hair {
  position: absolute;
  right: 10px; bottom: 6px;
  height: 1px; width: 34px;
  transform: scaleX(0);
  transform-origin: right;
  background: var(--thermal-accent);
  transition: transform var(--dur-reveal) var(--ease-compile);
}

[data-design="b"] .jkb-cta__arrow {
  transition: transform var(--dur-tick) var(--ease-compile);
}

[data-design="b"] .jkb-cta:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  animation-play-state: paused;
  transform: translateY(-1px);
}

[data-design="b"] .jkb-cta:focus-visible .jkb-cta__hair { transform: scaleX(1); }

@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .jkb-cta:hover {
    background: var(--ink-soft);
    animation-play-state: paused;
    box-shadow: var(--shadow-elev);
    transform: translateY(-1px);
  }
  [data-design="b"] .jkb-cta:hover .jkb-cta__hair  { transform: scaleX(1); }
  [data-design="b"] .jkb-cta:hover .jkb-cta__arrow { transform: translateX(3px); }
}

[data-design="b"] .jkb-cta:active { transform: translateY(1px); box-shadow: var(--shadow-signal); }

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .jkb-cta { animation: none; }
  [data-design="b"] .jkb-cta,
  [data-design="b"] .jkb-cta__hair,
  [data-design="b"] .jkb-cta__arrow { transition: none; }
}

@media (max-width: 390px) {
  [data-design="b"] .jkb-cta { width: 100%; justify-content: center; }
}

/* ══════════════════════════════════════════════════════════════════
   Services section + ambient console (Element 3)
   ══════════════════════════════════════════════════════════════════ */
[data-design="b"] .jkb-services {
  border-bottom: 1px solid var(--rule);
}

[data-design="b"] .jkb-ambient-a {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-bay) clamp(14px, 5vw, 40px) var(--space-block);
  border-bottom: 1px solid var(--rule);
}

[data-design="b"] .jkb-a__head {
  display: flex;
  align-items: center;
  gap: var(--space-row);
  flex-wrap: wrap;
  margin-bottom: var(--space-block);
}

[data-design="b"] .jkb-a__pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--thermal-accent);
  border: 1px solid var(--thermal-accent);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
}

[data-design="b"] .jkb-a__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--thermal-accent);
  animation: jkb-signal-pulse 3.2s var(--ease-stream) infinite;
}

@keyframes jkb-signal-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(158, 140, 252, 0); }
  50%       { box-shadow: 0 0 14px 3px var(--signal-glow); }
}

[data-design="b"] .jkb-a__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 4.5vw, 32px);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--ink);
  margin: 0;
}

[data-design="b"] .jkb-a__console {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: clamp(13px, 2vw, 15px);
  color: var(--ink-soft);
  background: var(--bg-deep);
  border: 1px solid var(--rule);
  border-radius: var(--radius-tight);
  padding: var(--space-row) var(--space-block);
  overflow: hidden;
}

[data-design="b"] .jkb-a__prompt { color: var(--muted); }

[data-design="b"] .jkb-a__value.is-compiled {
  animation: jkb-compile var(--dur-compile) var(--ease-compile) both;
}

@keyframes jkb-compile {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}

[data-design="b"] .jkb-a__cursor {
  color: var(--thermal-accent);
  animation: jkb-blink 1.06s steps(1, end) infinite;
}

@keyframes jkb-blink {
  0%, 49%  { opacity: 1; }
  50%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .jkb-a__dot,
  [data-design="b"] .jkb-a__cursor { animation: none; opacity: 1; }
  [data-design="b"] .jkb-a__value.is-compiled { animation: none; clip-path: none; }
}

/* Service cards grid */
[data-design="b"] .jkb-svc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: var(--space-block);
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-block) clamp(14px, 5vw, 40px) var(--space-bay);
}

[data-design="b"] .jkb-svc-card {
  background: var(--bg-deep);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  padding: var(--space-block);
  opacity: 1;
  transition: box-shadow var(--dur-compile) var(--ease-compile);
}

[data-design="b"] .jkb-svc-card--reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-reveal) var(--ease-compile),
              transform var(--dur-reveal) var(--ease-compile),
              box-shadow var(--dur-compile) var(--ease-compile);
}

[data-design="b"] .jkb-svc-card--reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .jkb-svc-card:hover { box-shadow: var(--shadow-elev); }
}

[data-design="b"] .jkb-svc-card__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--thermal-accent);
  margin-bottom: var(--space-tick);
}

[data-design="b"] .jkb-svc-card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 0 0 var(--space-em);
}

[data-design="b"] .jkb-svc-card__body {
  font-size: 15px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0;
}

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .jkb-svc-card--reveal {
    opacity: 1; transform: none; transition: none;
  }
}

/* ══════════════════════════════════════════════════════════════════
   About / Trust + Element 4 schematic
   ══════════════════════════════════════════════════════════════════ */
[data-design="b"] .jkb-about {
  border-bottom: 1px solid var(--rule);
}

[data-design="b"] .jkb-ambient-b {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: var(--space-pane);
  align-items: start;
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-bay) clamp(14px, 5vw, 40px);
}

[data-design="b"] .jkb-b__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--ink);
  margin: 0 0 var(--space-row);
}

[data-design="b"] .jkb-b__body {
  max-width: 54ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
  margin: 0 0 var(--space-block);
}

/* Trust spec sheet */
[data-design="b"] .jkb-trust-spec {
  display: grid;
  gap: var(--space-em);
  border-top: 1px solid var(--rule);
  padding-top: var(--space-row);
  margin-top: var(--space-block);
}

[data-design="b"] .jkb-trust-row {
  display: flex;
  gap: var(--space-block);
  font-family: var(--font-mono);
  font-size: 13px;
  flex-wrap: wrap;
}

[data-design="b"] .jkb-trust-key {
  color: var(--muted);
  letter-spacing: .06em;
  min-width: 120px;
  flex-shrink: 0;
}

[data-design="b"] .jkb-trust-val {
  color: var(--ink-soft);
}

/* Schematic (Element 4) */
[data-design="b"] .jkb-b__schematic {
  width: 100%; max-width: 100%; height: auto;
  background: var(--bg-deep);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  padding: 8px;
}

[data-design="b"] .jkb-b__rules path { fill: none; stroke: var(--rule-strong); stroke-width: 1; }

[data-design="b"] .jkb-b__trace {
  fill: none;
  stroke: var(--thermal-accent);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 6 560;
  animation: jkb-b-flow 16s linear infinite;
}

@keyframes jkb-b-flow {
  from { stroke-dashoffset: 0; }
  to   { stroke-dashoffset: -566; }
}

[data-design="b"] .jkb-b__node { fill: var(--ink-soft); }

[data-design="b"] .jkb-b__node--live {
  fill: var(--thermal-accent);
  animation: jkb-signal-pulse 3.2s var(--ease-stream) infinite;
}

[data-design="b"] .jkb-b__label {
  fill: var(--muted);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: .06em;
}

[data-design="b"] .jkb-ambient-b.is-paused .jkb-b__trace,
[data-design="b"] .jkb-ambient-b.is-paused .jkb-b__node--live { animation-play-state: paused; }

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .jkb-b__trace { animation: none; stroke-dasharray: none; }
  [data-design="b"] .jkb-b__node--live { animation: none; }
}

@media (max-width: 768px) {
  [data-design="b"] .jkb-ambient-b { grid-template-columns: 1fr; gap: var(--space-block); }
}

/* ══════════════════════════════════════════════════════════════════
   ELEMENT 6 — Pointer (thermal-flow wayfinding)
   data-mf-role="pointer" — LAST before #funnel
   opacity:1, height ≥ 8px, visible at all viewports
   ══════════════════════════════════════════════════════════════════ */
[data-design="b"] .jkb-pointer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-row);
  padding: var(--space-bay) clamp(14px, 5vw, 40px);
  max-width: 1280px;
  margin: 0 auto;
  opacity: 1;
  min-height: 80px;
}

[data-design="b"] .jkb-pointer__isotherm {
  width: 120px;
  height: 2px;
  background: linear-gradient(90deg, #3ab8d4, var(--thermal-accent));
  transform-origin: left;
  animation: jkb-isotherm-draw 3.2s var(--ease-compile) infinite;
}

@keyframes jkb-isotherm-draw {
  0%   { transform: scaleX(0.3); opacity: 0.4; }
  50%  { transform: scaleX(1);   opacity: 1; }
  100% { transform: scaleX(0.3); opacity: 0.4; }
}

[data-design="b"] .jkb-pointer__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .jkb-pointer__isotherm { animation: none; transform: scaleX(1); opacity: 0.8; }
}

/* ══════════════════════════════════════════════════════════════════
   Tap-qualify funnel — Element 5 / conversion
   id="funnel" data-mf-role="funnel"
   ══════════════════════════════════════════════════════════════════ */
[data-design="b"] .jkb-funnel {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--bg-deep);
}

[data-design="b"] .jkb-funnel__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-bay) clamp(14px, 5vw, 40px);
  display: flex;
  justify-content: center;
}

[data-design="b"] .jkb-funnel__panel {
  width: 100%;
  max-width: 560px;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  padding: var(--space-block);
}

[data-design="b"] .jkb-funnel__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: var(--space-em);
}

[data-design="b"] .jkb-funnel__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 4vw, 28px);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--ink);
  margin: 0 0 var(--space-tick);
}

[data-design="b"] .jkb-funnel__lead {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
  margin: 0 0 var(--space-block);
}

/* Steps — hidden by default, shown when is-active added by JS */
[data-design="b"] .jkb-step { display: none; }
[data-design="b"] .jkb-step.is-active { display: block; }

[data-design="b"] .jkb-step__question {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
  margin: 0 0 var(--space-row);
}

[data-design="b"] .jkb-step__options {
  display: flex;
  flex-direction: column;
  gap: var(--space-em);
}

[data-design="b"] .jkb-funnel-opt {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 48px;
  padding: 12px var(--space-block);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--bg-deep);
  border: 1px solid var(--rule);
  border-radius: var(--radius-tight);
  cursor: pointer;
  text-align: left;
  transition: border-color var(--dur-tick) var(--ease-compile),
              color var(--dur-tick) var(--ease-compile);
}

[data-design="b"] .jkb-funnel-opt:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .jkb-funnel-opt:hover {
    border-color: var(--thermal-accent);
    color: var(--ink);
  }
}

[data-design="b"] .jkb-funnel-opt:active { transform: scale(0.98); }

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .jkb-funnel-opt { transition: none; }
  [data-design="b"] .jkb-funnel-opt:active { transform: none; }
}

/* Result step — call + email */
[data-design="b"] .jkb-step__options--result { gap: var(--space-row); }

[data-design="b"] .jkb-funnel-call,
[data-design="b"] .jkb-funnel-email {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  padding: var(--space-row) var(--space-block);
  min-height: 64px;
  border-radius: var(--radius-tight);
  text-decoration: none;
  border: 1px solid var(--rule);
  transition: border-color var(--dur-tick) var(--ease-compile);
}

[data-design="b"] .jkb-funnel-call {
  background: color-mix(in srgb, var(--bg-deep) 80%, #c97a1a 20%);
  border-color: var(--amber);
}

[data-design="b"] .jkb-funnel-email {
  background: var(--bg-deep);
}

[data-design="b"] .jkb-funnel-call__label,
[data-design="b"] .jkb-funnel-email__label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
}

[data-design="b"] .jkb-funnel-call__sub,
[data-design="b"] .jkb-funnel-email__sub {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .04em;
}

@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .jkb-funnel-call:hover { border-color: var(--thermal-accent); }
  [data-design="b"] .jkb-funnel-email:hover { border-color: var(--signal); }
}

[data-design="b"] .jkb-funnel__note {
  margin: var(--space-block) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .04em;
  line-height: 1.6;
}

/* Progress dots */
[data-design="b"] .jkb-funnel__progress {
  display: flex;
  gap: var(--space-em);
  justify-content: center;
  margin-top: var(--space-block);
}

[data-design="b"] .jkb-funnel__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--rule-strong);
  transition: background var(--dur-tick) var(--ease-compile),
              transform var(--dur-tick) var(--ease-compile);
}

[data-design="b"] .jkb-funnel__dot.is-active {
  background: var(--thermal-accent);
  transform: scale(1.3);
}

/* ══════════════════════════════════════════════════════════════════
   Footer — imprint strip
   ══════════════════════════════════════════════════════════════════ */
[data-design="b"] .jkb-footer {
  border-top: 1px solid var(--rule);
}

[data-design="b"] .jkb-footer__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-block) clamp(14px, 5vw, 40px);
}

[data-design="b"] .jkb-footer__strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-em);
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .04em;
  line-height: 1.8;
}

[data-design="b"] .jkb-footer__sep { color: var(--rule-strong); }

[data-design="b"] .jkb-footer__phone,
[data-design="b"] .jkb-footer__email {
  color: var(--thermal-accent);
  text-decoration: none;
}

[data-design="b"] .jkb-footer__copy {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--rule-strong);
  letter-spacing: .04em;
  margin-top: var(--space-em);
}

/* ══════════════════════════════════════════════════════════════════
   Scroll-warming thermal transition (hvac_scroll_warming)
   --thermal-temp driven by JS via scroll position
   CSS transitions on thermal tokens drive the mood change
   ══════════════════════════════════════════════════════════════════ */
[data-design="b"] {
  /* Smooth thermal transition as --thermal-temp updates via JS */
  transition: --thermal-temp 600ms var(--ease-stream);
}

/* Sections warm their thermal accents continuously as scroll deepens */
[data-design="b"] .jkb-funnel {
  background: color-mix(in srgb, var(--bg-deep) 85%, var(--thermal-bg) 15%);
}

/* ══════════════════════════════════════════════════════════════════
   Mobile overrides — 320 / 390 / 768 / 1440
   ALL scoped to [data-design="b"].dq-design descendants
   ══════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  [data-design="b"] .jkb-hero { min-height: 85vh; }
  [data-design="b"] .jkb-hero__content { align-items: flex-start; }
}

@media (max-width: 560px) {
  [data-design="b"] .jkb-hero { min-height: 90vh; align-items: flex-end; }
  [data-design="b"] .jkb-hero__content { padding-bottom: clamp(40px, 8vh, 80px); }
  [data-design="b"] .jkb-hero__headline { font-size: clamp(28px, 9vw, 48px); }
  [data-design="b"] .jkb-ambient-b { grid-template-columns: 1fr; }
}

@media (max-width: 390px) {
  [data-design="b"] .jkb-hero__content { padding-left: 14px; padding-right: 14px; }
  [data-design="b"] .jkb-funnel__panel { padding: var(--space-row); }
  [data-design="b"] .jkb-trust-key { min-width: 90px; font-size: 11px; }
  [data-design="b"] .jkb-footer__strip { font-size: 11px; }
}

@media (max-width: 320px) {
  [data-design="b"] .jkb-hero__content { padding-left: 12px; padding-right: 12px; }
  [data-design="b"] .jkb-header__bar { padding-left: 12px; padding-right: 12px; }
}

/* Phase-3.4 hero visibility floor (forge_assemble) */
[data-design="b"] [data-mf-role="hero"] :is(h1,h2,p,.headline,.subtitle,.proof,[class*="headline"],[class*="subtitle"],[class*="proof"]),
[data-design="b"] [data-mf-role="cta"] { opacity: 1 !important; }