/* ═══════════════════════════════════════════════════════════
   HVAC Orlando · Design B (method) · styles.css
   All selectors scoped to [data-design="b"].dq-design
   Thermal spine: --thermal-temp 0..1 (cool teal → warm amber)
   Airflow signature: Site B — ambient duct/vent/stream animation
   Motion gate: transform/opacity/clip-path ONLY. No layout props.
   ═══════════════════════════════════════════════════════════ */

/* ── Design tokens ── */
[data-design="b"].dq-design,
[data-design="b"] .dq-design {
  /* Method base palette */
  --ink:           #0A0A0A;
  --ink-2:         #3B3B3B;
  --muted:         #6B6B6B;
  --bg:            #FAFAFA;
  --surface:       #FFFFFF;
  --border:        #E6E6E6;
  --border-strong: #1A1A1A;
  --accent:        #B4FF3F;
  --accent-ink:    #0A0A0A;
  --critical:      #E5484D;
  --success:       #30A46C;

  /* Thermal spine — cool teal → warm amber */
  --thermal-temp:   0;           /* 0=cold, 1=warm — driven by scroll + JS */
  --thermal-cool:   #0D9488;    /* teal-600 */
  --thermal-warm:   #D97706;    /* amber-600 */
  --thermal-bg:     color-mix(in oklab, #D97706, #0D9488 calc((1 - var(--thermal-temp)) * 100%));
  --thermal-accent: color-mix(in oklab, #FCD34D, #99F6E4 calc((1 - var(--thermal-temp)) * 100%));
  --cd-primary: var(--thermal-bg);

  /* Method typography */
  --font-display: 'Inter', -apple-system, system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'Geist Mono', 'JetBrains Mono', ui-monospace, monospace;

  /* Method spacing */
  --gap-tick:    4px;
  --gap-row:     12px;
  --gap-cell:    20px;
  --gap-stack:   32px;
  --gap-section: 96px;
  --gap-rail:    16px;

  /* Method easing */
  --ease-snap:   cubic-bezier(0.2, 0.9, 0.1, 1);
  --ease-breath: cubic-bezier(0.45, 0, 0.55, 1);

  /* Method durations */
  --dur-tick:   80ms;
  --dur-snap:   180ms;
  --dur-stage:  320ms;
  --dur-breath: 4s;
  --dur-pool:   24s;

  /* Method radii */
  --r-tight: 2px;
  --r-cell:  6px;
  --r-cmd:   8px;
  --r-round: 9999px;

  /* Airflow stream color — tinted by thermal-temp */
  --airflow-color: var(--thermal-bg);
  --airflow-opacity: 0.55;

  box-sizing: border-box;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
}

/* Mobile overflow guard — MUST NOT leak to shared chrome */
[data-design="b"].dq-design { max-width: 100%; overflow-x: clip; }
[data-design="b"].dq-design * { min-width: 0; box-sizing: border-box; }
[data-design="b"].dq-design img,
[data-design="b"].dq-design svg:not([data-keep-size]) { max-width: 100%; height: auto; }

/* ── Visually-hidden helper ── */
[data-design="b"] .rf-vh {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ═══════════════════════════════════════════════════════════
   E1 — HEADER (method verbatim, scoped to [data-design="b"])
   ═══════════════════════════════════════════════════════════ */
[data-design="b"].rf-header,
[data-design="b"] .rf-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
}

[data-design="b"] .rf-header__bar {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
  padding-inline: clamp(16px, 4vw, 40px);
  max-width: 1440px; margin-inline: auto;
}

[data-design="b"] .rf-logo {
  display: inline-flex; gap: var(--gap-tick); align-items: baseline;
  color: var(--ink); text-decoration: none;
  font: 500 15px/1 var(--font-mono);
  letter-spacing: 0.08em; text-transform: uppercase;
}
[data-design="b"] .rf-logo__bracket { color: var(--accent); }

[data-design="b"] .rf-burger {
  position: relative; display: inline-flex; flex-direction: column;
  gap: 5px; padding: 10px 12px 10px 14px;
  background: transparent; border: 1px solid var(--border);
  border-radius: var(--r-tight); cursor: pointer;
  min-width: 44px; min-height: 44px;
  justify-content: center; align-items: center;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-burger:hover { border-color: var(--ink); }
}
[data-design="b"] .rf-burger__row {
  width: 18px; height: 1.5px; background: var(--ink); display: block;
}
[data-design="b"] .rf-burger__kbd {
  position: absolute; right: -56px; top: 50%; transform: translateY(-50%);
  font: 500 11px/1 var(--font-mono); color: var(--muted);
  letter-spacing: 0.08em;
}

[data-design="b"] .rf-header__rule {
  position: relative; height: 1px; background: transparent; overflow: hidden;
}
[data-design="b"] .rf-header__regmark {
  position: absolute; top: 0; left: -8%;
  width: 6px; height: 1px;
  background: var(--thermal-bg);
  animation: b-sweep var(--dur-pool) linear infinite;
}
@keyframes b-sweep {
  0%   { transform: translateX(0);     opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { transform: translateX(112vw); opacity: 0; }
}

/* Drawer */
[data-design="b"] .rf-drawer[open] {
  position: fixed; inset: 0; width: 100vw; height: 100vh;
  margin: 0; border: 0;
  padding: 64px clamp(16px, 4vw, 40px);
  background: var(--bg); color: var(--ink);
  display: flex; flex-direction: column; justify-content: space-between;
  z-index: 100;
}
[data-design="b"] .rf-drawer:not([open]) { display: none; }

[data-design="b"] .rf-drawer__nav {
  display: flex; flex-direction: column; gap: var(--gap-stack);
}
[data-design="b"] .rf-drawer__nav a {
  font: 500 clamp(28px, 6vw, 56px)/1.05 var(--font-display);
  letter-spacing: -0.025em; color: var(--ink); text-decoration: none;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-drawer__nav a:hover { color: var(--thermal-bg); }
}
[data-design="b"] .rf-drawer__actions {
  display: flex; flex-direction: column; gap: 12px;
  margin-top: var(--gap-stack);
}
[data-design="b"] .rf-drawer__phone {
  font: 500 20px/1.2 var(--font-mono); color: var(--ink);
  text-decoration: none; letter-spacing: 0.04em;
}
[data-design="b"] .rf-drawer__quote-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 20px; background: var(--accent); color: var(--accent-ink);
  border: 1px solid var(--ink); border-radius: var(--r-cmd);
  font: 500 14px/1 var(--font-mono); letter-spacing: 0.04em;
  text-transform: uppercase; text-decoration: none;
  width: max-content;
}
[data-design="b"] .rf-drawer__meta {
  display: flex; gap: var(--gap-tick); align-items: center;
  font: 500 13px/1 var(--font-mono); color: var(--muted);
}
[data-design="b"] .rf-drawer__kbd {
  border: 1px solid var(--border); padding: 4px 8px;
  border-radius: var(--r-tight); color: var(--ink);
}

@media (max-width: 560px) {
  [data-design="b"] .rf-burger__kbd { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-header__regmark {
    animation: none; transform: translateX(50vw); opacity: 1;
  }
}

/* ═══════════════════════════════════════════════════════════
   E3 + E5 HERO — thermal backdrop + airflow signature
   isolation: isolate on <section>, text layer z-index above backdrop
   ═══════════════════════════════════════════════════════════ */
[data-design="b"] .b-hero {
  position: relative;
  min-height: 72vh;
  display: flex; align-items: center;
  overflow: hidden;
  background: var(--bg);
}

/* Thermal backdrop (E3) */
[data-design="b"] .b-hero__backdrop {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
}
[data-design="b"] .b-hero__canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: 0.38;
}
[data-design="b"] .b-hero__gradient {
  position: absolute; inset: 0;
  background: linear-gradient(
    135deg,
    color-mix(in oklab, var(--thermal-cool), transparent 30%) 0%,
    color-mix(in oklab, var(--thermal-bg), transparent 60%) 50%,
    color-mix(in oklab, var(--thermal-warm), transparent 50%) 100%
  );
  opacity: 0.28;
  /* Ambient thermal drift — GPU only, sustained */
  animation: b-thermal-drift 9s var(--ease-breath) infinite alternate;
}
@keyframes b-thermal-drift {
  0%   { opacity: 0.22; transform: scale(1.00); }
  100% { opacity: 0.36; transform: scale(1.04); }
}

/* E5 Airflow SVG — ambient, site-wide, threads entire hero */
[data-design="b"] .b-airflow {
  position: absolute; inset: 0; z-index: 1;
  width: 100%; height: 100%;
  pointer-events: none;
  overflow: visible;
}

/* Duct geometry */
[data-design="b"] .b-duct {
  stroke: var(--thermal-bg);
  opacity: 0.18;
}

/* Vent registers */
[data-design="b"] .b-vent {
  stroke: var(--thermal-bg);
  opacity: 0.25;
}

/* Air stream particles — flowing through ducts, tinted by --thermal-bg */
[data-design="b"] .b-particle {
  fill: var(--thermal-bg);
  opacity: var(--airflow-opacity);
}
[data-design="b"] .b-particle-v {
  fill: var(--thermal-bg);
  opacity: var(--airflow-opacity);
}

/* Horizontal duct particles (left→right sweep along y=90) */
[data-design="b"] .b-particle--1 {
  animation: b-flow-h 5.2s linear infinite;
}
[data-design="b"] .b-particle--2 {
  animation: b-flow-h 5.2s linear infinite;
  animation-delay: -1.8s;
}
[data-design="b"] .b-particle--3 {
  animation: b-flow-h 5.2s linear infinite;
  animation-delay: -3.4s;
}
[data-design="b"] .b-particle--4 {
  animation: b-flow-h 7.8s linear infinite;
  animation-delay: -2.2s;
  opacity: 0.3;
}
/* Bottom duct particles */
[data-design="b"] .b-particle--5 {
  animation: b-flow-bottom 6.4s linear infinite;
}
[data-design="b"] .b-particle--6 {
  animation: b-flow-bottom 6.4s linear infinite;
  animation-delay: -2.8s;
}
/* Vertical branch particles (top→down on x=1100) */
[data-design="b"] .b-particle-v--1 {
  animation: b-flow-v 4.8s linear infinite;
}
[data-design="b"] .b-particle-v--2 {
  animation: b-flow-v 4.8s linear infinite;
  animation-delay: -2.1s;
}
/* Mid-page duct particles */
[data-design="b"] .b-particle--mp1 {
  animation: b-flow-mp 6s linear infinite;
}
[data-design="b"] .b-particle--mp2 {
  animation: b-flow-mp 6s linear infinite;
  animation-delay: -2.6s;
}
/* Footer duct particle */
[data-design="b"] .b-particle--ft1 {
  animation: b-flow-ft 8s linear infinite;
}

@keyframes b-flow-h {
  0%   { transform: translateX(0);     opacity: 0; }
  8%   { opacity: 0.6; }
  92%  { opacity: 0.5; }
  100% { transform: translateX(1440px); opacity: 0; }
}
@keyframes b-flow-bottom {
  0%   { transform: translateX(0);     opacity: 0; }
  8%   { opacity: 0.55; }
  92%  { opacity: 0.45; }
  100% { transform: translateX(740px); opacity: 0; }
}
@keyframes b-flow-v {
  0%   { transform: translateY(0);     opacity: 0; }
  10%  { opacity: 0.55; }
  90%  { opacity: 0.4; }
  100% { transform: translateY(310px); opacity: 0; }
}
@keyframes b-flow-mp {
  0%   { transform: translateX(0);     opacity: 0; }
  8%   { opacity: 0.45; }
  92%  { opacity: 0.35; }
  100% { transform: translateX(1440px); opacity: 0; }
}
@keyframes b-flow-ft {
  0%   { transform: translateX(0);     opacity: 0; }
  8%   { opacity: 0.35; }
  92%  { opacity: 0.25; }
  100% { transform: translateX(1440px); opacity: 0; }
}

/* Hero text content — z-index above ALL backdrop layers */
[data-design="b"] .b-hero__content {
  position: relative; z-index: 10;
  display: flex; flex-direction: column; gap: 16px;
  padding: clamp(64px, 10vh, 120px) clamp(16px, 4vw, 80px);
  max-width: min(720px, 100%);
  margin-inline: auto 0;
  width: 100%;
  /* Windowed center on ultrawide */
  padding-left: max(clamp(16px, 4vw, 80px), calc((100% - 1280px) / 2));
}

[data-design="b"] .b-hero__kicker {
  font: 500 11px/1 var(--font-mono);
  color: var(--muted);
  letter-spacing: 0.12em; text-transform: uppercase;
  opacity: 1; /* HARD RULE: never opacity:0 on hero text */
}

[data-design="b"] .b-hero__headline {
  font: 500 clamp(32px, 5vw, 56px)/1.05 var(--font-display);
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0;
  opacity: 1; /* HARD RULE */
}

[data-design="b"] .b-hero__subtitle {
  font: 400 clamp(16px, 2vw, 20px)/1.6 var(--font-body);
  color: var(--ink-2);
  margin: 0;
  max-width: 52ch;
  opacity: 1;
}

[data-design="b"] .b-hero__proof {
  font: 500 13px/1.4 var(--font-mono);
  color: var(--muted);
  margin: 0;
  letter-spacing: 0.04em;
  opacity: 1;
}

/* ═══════════════════════════════════════════════════════════
   E2 — ANIMATED CTA (method breath, lime fill)
   ═══════════════════════════════════════════════════════════ */
[data-design="b"] .rf-cta {
  position: relative; display: inline-flex; align-items: center;
  gap: 12px; padding: 14px 20px 14px 22px;
  background: var(--accent); color: var(--accent-ink);
  border: 1px solid var(--ink); border-radius: var(--r-cmd);
  font: 500 15px/1 var(--font-mono); letter-spacing: 0.02em;
  text-transform: uppercase; text-decoration: none;
  width: max-content; min-height: 44px;
  animation: b-cta-breath var(--dur-breath) var(--ease-breath) infinite;
  will-change: transform;
}
[data-design="b"] .rf-cta__kbd {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px;
  border: 1px solid var(--ink); border-radius: var(--r-tight);
  font: 500 13px/1 var(--font-mono);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-cta:hover {
    box-shadow: 0 0 0 3px var(--ink);
  }
}
[data-design="b"] .rf-cta:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--accent), 0 0 0 3px var(--ink);
}
[data-design="b"] .rf-cta:active {
  transform: translateY(1px);
}
@keyframes b-cta-breath {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in oklab, var(--accent), transparent 50%); }
  50%      { box-shadow: 0 0 0 6px color-mix(in oklab, var(--accent), transparent 80%); }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-cta { animation: none; }
  [data-design="b"] .rf-cta:active { transform: none; }
}

/* ═══════════════════════════════════════════════════════════
   E6 — POINTER (thermal-flow, immediately before #quote funnel)
   NOT a button. Visible: opacity:1, height >8px at all viewports.
   ═══════════════════════════════════════════════════════════ */
[data-design="b"] .b-pointer {
  display: flex; align-items: center; justify-content: center;
  padding: 32px clamp(16px, 4vw, 80px);
  opacity: 1; /* HARD: never opacity:0 on pointer */
  min-height: 80px;
  /* Windowed center */
  max-width: 1280px; margin-inline: auto;
}

[data-design="b"] .b-pointer__inner {
  display: flex; flex-direction: column; align-items: center;
  gap: 12px; width: 100%; max-width: 480px;
}

/* Isotherm line — draws warm→cool across toward funnel */
[data-design="b"] .b-pointer__isotherm {
  display: flex; align-items: center; gap: 0; width: 100%;
  position: relative;
}
[data-design="b"] .b-pointer__iso-line {
  display: block; height: 1px; flex: 1;
  background: linear-gradient(90deg, var(--thermal-cool) 0%, var(--thermal-bg) 100%);
  transform-origin: left;
  animation: b-iso-draw 3s var(--ease-snap) infinite;
}
[data-design="b"] .b-pointer__iso-dot {
  display: block; width: 6px; height: 6px; border-radius: var(--r-round);
  background: var(--thermal-bg);
  animation: b-iso-pulse 3s var(--ease-snap) infinite;
}
@keyframes b-iso-draw {
  0%   { transform: scaleX(0.15); opacity: 0.3; }
  40%  { transform: scaleX(1);    opacity: 1; }
  75%  { transform: scaleX(1);    opacity: 1; }
  100% { transform: scaleX(0.15); opacity: 0.3; }
}
@keyframes b-iso-pulse {
  0%   { transform: scale(0.92); opacity: 0.4; }
  40%  { transform: scale(1.2);  opacity: 1; }
  75%  { transform: scale(1);    opacity: 0.8; }
  100% { transform: scale(0.92); opacity: 0.4; }
}

[data-design="b"] .b-pointer__label {
  display: flex; align-items: center; gap: 8px;
  font: 500 11px/1 var(--font-mono); color: var(--muted);
  letter-spacing: 0.1em; text-transform: uppercase;
}
[data-design="b"] .b-pointer__text { opacity: 1; }
[data-design="b"] .b-pointer__chev {
  color: var(--thermal-bg);
  font-size: 16px;
  animation: b-chev-drop 3s var(--ease-breath) infinite;
}
@keyframes b-chev-drop {
  0%, 100% { transform: translateY(0);   opacity: 0.45; }
  50%      { transform: translateY(4px); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .b-pointer__iso-line,
  [data-design="b"] .b-pointer__iso-dot,
  [data-design="b"] .b-pointer__chev {
    animation: none;
  }
  [data-design="b"] .b-pointer__iso-line {
    transform: scaleX(1); opacity: 0.6;
  }
}

/* ═══════════════════════════════════════════════════════════
   FUNNEL (E5 — tap-qualify, planning mode)
   id="quote" data-mf-role="funnel"
   ═══════════════════════════════════════════════════════════ */
[data-design="b"] .b-funnel-section {
  /* Warm end of thermal spine — funnel section is the hot zone */
  background: color-mix(in oklab, var(--thermal-bg), var(--bg) 92%);
  border-top: 1px solid var(--border);
  transition: background 600ms ease-out;
}

[data-design="b"] .rf-interactive {
  padding: var(--gap-section) clamp(16px, 4vw, 80px);
  max-width: 1280px; margin-inline: auto;
}

[data-design="b"] .rf-funnel__head {
  max-width: 720px; margin-bottom: var(--gap-stack);
  display: flex; flex-direction: column; gap: 10px;
}
[data-design="b"] .rf-funnel__kicker {
  font: 500 12px/1 var(--font-mono); color: var(--muted);
  letter-spacing: 0.12em; text-transform: uppercase;
}
[data-design="b"] .rf-funnel__title {
  font: 500 clamp(28px, 4vw, 40px)/1.05 var(--font-display);
  letter-spacing: -0.025em; margin: 0; color: var(--ink);
}
[data-design="b"] .rf-funnel__sub {
  font: 400 16px/1.5 var(--font-body); color: var(--ink-2); margin: 0;
}

[data-design="b"] .rf-funnel {
  border: 1px solid var(--ink); border-radius: var(--r-cell);
  background: var(--surface);
  padding: clamp(20px, 3vw, 36px);
  max-width: 720px;
}
[data-design="b"] .rf-funnel__steps {
  list-style: none; margin: 0 0 var(--gap-stack); padding: 0;
  display: flex; gap: 18px; flex-wrap: wrap;
  font: 500 12px/1 var(--font-mono); color: var(--muted);
  letter-spacing: 0.08em;
}
[data-design="b"] .rf-funnel__steps li.is-active { color: var(--ink); }
[data-design="b"] .rf-funnel__steps li.is-done {
  color: var(--ink);
  text-decoration: line-through;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
}

[data-design="b"] .rf-funnel__panel {
  border: 0; padding: 0; margin: 0;
  display: none;
}
[data-design="b"] .rf-funnel__panel.is-active {
  display: flex; flex-direction: column; gap: 16px;
  animation: b-step-in var(--dur-stage) var(--ease-snap) both;
}
@keyframes b-step-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
[data-design="b"] .rf-funnel__legend {
  font: 500 17px/1.2 var(--font-body); color: var(--ink); margin-bottom: 4px;
}
[data-design="b"] .rf-funnel__opts {
  display: grid; gap: 8px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
[data-design="b"] .rf-funnel__opts label {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--border); border-radius: var(--r-tight);
  padding: 12px 14px; cursor: pointer;
  font: 500 14px/1.3 var(--font-mono);
  /* opacity:1 at rest — never opacity:0 on funnel options */
  opacity: 1;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-funnel__opts label:hover { border-color: var(--ink); }
}
[data-design="b"] .rf-funnel__opts input:checked + span { color: var(--ink); }
[data-design="b"] .rf-funnel__opts label:has(input:checked) {
  border-color: var(--ink); background: var(--bg);
  box-shadow: inset 4px 0 0 var(--accent);
}
/* Hide radio visually but keep accessible */
[data-design="b"] .rf-funnel__opts input[type="radio"] {
  position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none;
}

[data-design="b"] .rf-funnel__actions {
  display: flex; gap: 12px; margin-top: 8px;
  align-items: center; flex-wrap: wrap;
}
[data-design="b"] .rf-funnel__next,
[data-design="b"] .rf-funnel__submit {
  background: var(--accent); color: var(--accent-ink);
  border: 1px solid var(--ink); border-radius: var(--r-cmd);
  padding: 12px 18px; min-height: 44px;
  font: 500 14px/1 var(--font-mono); letter-spacing: 0.04em;
  text-transform: uppercase; cursor: pointer;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-funnel__next:hover,
  [data-design="b"] .rf-funnel__submit:hover {
    box-shadow: 0 0 0 3px var(--ink);
  }
}
[data-design="b"] .rf-funnel__prev {
  background: transparent; color: var(--ink);
  border: 1px solid var(--border); border-radius: var(--r-cmd);
  padding: 12px 16px; min-height: 44px;
  font: 500 14px/1 var(--font-mono); letter-spacing: 0.04em;
  text-transform: uppercase; cursor: pointer;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-funnel__prev:hover { border-color: var(--ink); }
}

/* Confirm / receipt panel */
[data-design="b"] .rf-funnel__receipt {
  display: flex; flex-direction: column; gap: 16px;
}
[data-design="b"] .b-receipt__msg {
  font: 400 16px/1.5 var(--font-body); color: var(--ink-2); margin: 0;
}
[data-design="b"] .b-receipt__sub {
  font: 400 14px/1.4 var(--font-body); color: var(--muted); margin: 0;
}

/* Tap-to-call CTA in receipt */
[data-design="b"] .b-call-cta {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 16px 24px; min-height: 52px;
  background: var(--ink); color: var(--bg);
  border: 1px solid var(--ink); border-radius: var(--r-cmd);
  font: 500 16px/1 var(--font-mono); letter-spacing: 0.02em;
  text-decoration: none; text-transform: uppercase;
  width: max-content; max-width: 100%;
}
[data-design="b"] .b-call-cta__kbd {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px;
  border: 1px solid var(--bg); border-radius: var(--r-tight);
  font: 500 13px/1 var(--font-mono);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .b-call-cta:hover {
    background: var(--thermal-bg); border-color: var(--thermal-bg);
  }
}
[data-design="b"] .b-call-cta--small {
  font-size: 14px; padding: 12px 18px; min-height: 44px;
}

[data-design="b"] .rf-funnel__receipt-id {
  font: 500 clamp(24px, 3vw, 36px)/1 var(--font-mono);
  color: var(--accent-ink);
  letter-spacing: 0.04em;
  padding: 10px 14px;
  border: 1px solid var(--ink); border-radius: var(--r-cell);
  background: var(--accent);
  width: max-content;
  opacity: 1;
}
[data-design="b"] .rf-funnel__receipt p {
  font: 400 16px/1.5 var(--font-body); color: var(--ink-2); margin: 0;
}

/* Optional note textarea */
[data-design="b"] .b-note-field {
  display: flex; flex-direction: column; gap: 6px;
}
[data-design="b"] .b-note-field > span {
  font: 500 12px/1 var(--font-mono); color: var(--muted);
  letter-spacing: 0.06em; text-transform: uppercase;
}
[data-design="b"] .b-note-field textarea {
  font: 400 16px/1.5 var(--font-body); color: var(--ink);
  background: var(--bg); border: 0; border-bottom: 1px solid var(--border);
  padding: 8px 0; outline: none; resize: vertical;
  min-height: 64px;
}
[data-design="b"] .b-note-field textarea:focus { border-bottom-color: var(--ink); }

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-funnel__panel.is-active { animation: none; }
}

/* ═══════════════════════════════════════════════════════════
   E3 AMBIENT A — Services snap-grid (method matter-index)
   ═══════════════════════════════════════════════════════════ */
[data-design="b"] .b-services {
  border-top: 1px solid var(--border);
  background: var(--surface);
}
[data-design="b"] .rf-ambient-a {
  padding: var(--gap-section) clamp(16px, 4vw, 80px);
  max-width: 1280px; margin-inline: auto;
}
[data-design="b"] .rf-ambient-a__head {
  display: flex; flex-direction: column; gap: 8px;
  margin-bottom: var(--gap-stack); max-width: 720px;
}
[data-design="b"] .rf-ambient-a__kicker {
  font: 500 12px/1 var(--font-mono); color: var(--muted);
  letter-spacing: 0.12em; text-transform: uppercase;
}
[data-design="b"] .rf-ambient-a h2 {
  font: 500 clamp(28px, 4vw, 40px)/1.05 var(--font-display);
  letter-spacing: -0.025em; margin: 0; color: var(--ink);
}
[data-design="b"] .rf-ambient-a__list {
  list-style: none; margin: 0; padding: 0;
  border-top: 1px solid var(--border);
}
[data-design="b"] .rf-area {
  display: grid;
  grid-template-columns: 96px 1.4fr 2fr 200px;
  align-items: center;
  gap: var(--gap-cell);
  padding: 18px 4px;
  border-bottom: 1px solid var(--border);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-area:hover { background: color-mix(in oklab, var(--thermal-bg), var(--bg) 94%); }
}
[data-design="b"] .rf-area__id {
  font: 500 13px/1 var(--font-mono); color: var(--muted); letter-spacing: 0.04em;
}
[data-design="b"] .rf-area__name {
  font: 500 17px/1.2 var(--font-body); color: var(--ink);
}
[data-design="b"] .rf-area__summary {
  font: 400 14px/1.4 var(--font-body); color: var(--ink-2);
}
[data-design="b"] .rf-area__bar {
  position: relative; height: 1px; background: var(--border); overflow: hidden;
}
[data-design="b"] .rf-area__fill {
  position: absolute; top: 0; left: 0; height: 1px;
  width: var(--rf-fill, 72%); background: var(--thermal-bg);
  transform: scaleX(0); transform-origin: left;
  transition: transform 1200ms var(--ease-snap);
}
[data-design="b"] .rf-area.is-revealed .rf-area__fill { transform: scaleX(1); }
[data-design="b"] .rf-area.is-revealed .rf-area__fill::after {
  content: ''; position: absolute; right: -3px; top: -1px;
  width: 3px; height: 3px; background: var(--thermal-bg);
  animation: b-area-pulse 2.4s var(--ease-breath) infinite;
}
@keyframes b-area-pulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50%      { opacity: 1;   transform: scale(1.6); }
}
@media (max-width: 720px) {
  [data-design="b"] .rf-area {
    grid-template-columns: 80px 1fr;
    grid-template-areas: "id name" ". summary" ". bar";
    gap: 6px 16px; padding: 16px 0;
  }
  [data-design="b"] .rf-area__id     { grid-area: id; }
  [data-design="b"] .rf-area__name   { grid-area: name; }
  [data-design="b"] .rf-area__summary{ grid-area: summary; font-size: 13px; }
  [data-design="b"] .rf-area__bar    { grid-area: bar; margin-top: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-area__fill { transition: none; transform: scaleX(1); }
  [data-design="b"] .rf-area.is-revealed .rf-area__fill::after { animation: none; }
}

/* ═══════════════════════════════════════════════════════════
   E4 — AMBIENT B: status typewriter + mid-page duct threading
   ═══════════════════════════════════════════════════════════ */
[data-design="b"] .b-ambient-b {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: relative; overflow: hidden;
}
[data-design="b"] .rf-ambient-b {
  padding: var(--gap-section) clamp(16px, 4vw, 80px);
  max-width: 1280px; margin-inline: auto;
}
[data-design="b"] .b-ambient-ducts {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
}
[data-design="b"] .b-ambient-duct-svg {
  position: absolute; inset: 0; width: 100%; height: 100%;
}
[data-design="b"] .rf-status {
  position: relative; z-index: 1;
  display: flex; align-items: baseline; gap: 14px;
  font: 500 clamp(18px, 3vw, 28px)/1.3 var(--font-mono);
  color: var(--ink);
}
[data-design="b"] .rf-status__prompt { color: var(--thermal-bg); }
[data-design="b"] .rf-status__line {
  flex: 1; min-width: 0;
  white-space: nowrap; overflow: hidden; text-overflow: clip;
}
[data-design="b"] .rf-status__cursor {
  display: inline-block; width: 0.55ch; height: 1em;
  background: var(--ink); vertical-align: -0.12em;
  margin-left: 2px;
  animation: b-cursor-blink 1.1s steps(1, end) infinite;
}
[data-design="b"] .rf-status__lane {
  font: 500 12px/1 var(--font-mono); color: var(--muted);
  letter-spacing: 0.1em; text-transform: uppercase;
  white-space: nowrap;
}
@keyframes b-cursor-blink {
  0%, 50%   { opacity: 1; }
  51%, 100% { opacity: 0; }
}
[data-design="b"] .rf-status[data-paused="true"] .rf-status__cursor {
  animation-play-state: paused;
}
@media (max-width: 560px) {
  [data-design="b"] .rf-status__lane { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-status__cursor { animation: none; opacity: 1; }
}

/* ═══════════════════════════════════════════════════════════
   ABOUT / TRUST
   ═══════════════════════════════════════════════════════════ */
[data-design="b"] .b-about {
  padding: var(--gap-section) clamp(16px, 4vw, 80px);
  border-top: 1px solid var(--border);
  max-width: 1280px; margin-inline: auto;
}
[data-design="b"] .b-about__inner {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: start;
}
[data-design="b"] .b-about__meta {
  display: flex; flex-direction: column; gap: 16px;
  padding-top: 4px;
}
[data-design="b"] .b-meta-row {
  display: flex; flex-direction: column; gap: 2px;
}
[data-design="b"] .b-meta-label {
  font: 500 10px/1 var(--font-mono); color: var(--muted);
  letter-spacing: 0.12em; text-transform: uppercase;
}
[data-design="b"] .b-meta-val {
  font: 500 15px/1.3 var(--font-mono); color: var(--ink);
}
[data-design="b"] .b-meta-val a {
  color: var(--ink); text-decoration: none;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .b-meta-val a:hover { color: var(--thermal-bg); }
}
[data-design="b"] .b-about__body h2 {
  font: 500 clamp(22px, 3vw, 32px)/1.15 var(--font-display);
  letter-spacing: -0.02em; margin: 0 0 var(--gap-stack); color: var(--ink);
}
[data-design="b"] .b-about__body p {
  font: 400 17px/1.7 var(--font-body); color: var(--ink-2);
  margin: 0 0 16px; max-width: 64ch;
}

@media (max-width: 720px) {
  [data-design="b"] .b-about__inner {
    grid-template-columns: 1fr;
  }
  [data-design="b"] .b-about__meta {
    flex-direction: row; flex-wrap: wrap; gap: 20px 32px;
  }
}

/* ═══════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════ */
[data-design="b"] .b-footer {
  border-top: 1px solid var(--border);
  background: var(--ink);
  color: var(--bg);
  position: relative; overflow: hidden;
}
[data-design="b"] .b-footer__inner {
  max-width: 1280px; margin-inline: auto;
  padding: clamp(48px, 6vw, 80px) clamp(16px, 4vw, 80px);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px; align-items: start;
}
[data-design="b"] .b-footer .rf-logo { color: var(--bg); }
[data-design="b"] .b-footer .rf-logo__bracket { color: var(--accent); }
[data-design="b"] .b-footer__tagline {
  display: block; margin-top: 6px;
  font: 500 12px/1 var(--font-mono); color: color-mix(in oklab, var(--bg), var(--ink) 40%);
  letter-spacing: 0.08em;
}
[data-design="b"] .b-footer__links {
  display: flex; flex-direction: column; gap: 12px;
}
[data-design="b"] .b-footer__links a {
  font: 500 14px/1 var(--font-mono); color: color-mix(in oklab, var(--bg), var(--ink) 20%);
  text-decoration: none; letter-spacing: 0.04em;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .b-footer__links a:hover { color: var(--accent); }
}
[data-design="b"] .b-footer__meta {
  display: flex; flex-direction: column; gap: 8px;
  font: 400 12px/1.4 var(--font-mono);
  color: color-mix(in oklab, var(--bg), var(--ink) 50%);
}
[data-design="b"] .b-footer__duct {
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 40px; pointer-events: none; z-index: 0;
  opacity: 0.15;
}

@media (max-width: 720px) {
  [data-design="b"] .b-footer__inner {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 480px) {
  [data-design="b"] .b-footer__inner {
    grid-template-columns: 1fr;
  }
}

/* ═══════════════════════════════════════════════════════════
   AIRFLOW — prefers-reduced-motion
   Stilled to a valid static frame — never blank
   ═══════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .b-particle,
  [data-design="b"] .b-particle-v {
    animation: none;
    opacity: 0.2;
    /* Position at midpoint of duct for a static tinted frame */
    transform: translateX(400px);
  }
  [data-design="b"] .b-particle-v--1,
  [data-design="b"] .b-particle-v--2 {
    transform: translateY(120px);
  }
  [data-design="b"] .b-hero__gradient {
    animation: none; opacity: 0.28;
  }
}

/* ═══════════════════════════════════════════════════════════
   SCROLL-LINKED THERMAL WARMING
   --thermal-temp driven by JS on scroll toward #quote
   CSS reads the token for live mood changes
   ═══════════════════════════════════════════════════════════ */
/* These rules react to --thermal-temp set by JS scroll listener */
[data-design="b"] .b-hero__gradient {
  /* gradient re-computes as --thermal-bg updates */
}
[data-design="b"] .b-funnel-section {
  background: color-mix(in oklab, var(--thermal-bg), var(--bg) 92%);
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE — 320/390/768/1440 guard
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 560px) {
  [data-design="b"] .b-hero__content {
    padding-left: clamp(16px, 5vw, 24px);
    padding-right: clamp(16px, 5vw, 24px);
  }
  [data-design="b"] .rf-funnel__opts {
    grid-template-columns: 1fr;
  }
  [data-design="b"] .b-pointer {
    padding: 24px clamp(16px, 5vw, 24px);
  }
}

/* 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; }