/* ============================================================
   Independence HVAC — design-b (phasor variant, HVAC slot B)
   All selectors scoped to [data-design="b"].dq-design
   ZERO [data-design="b"].dq-design selectors — remapped verbatim
   ============================================================ */

/* ── Token system + thermal spine ── */
[data-design="b"] {
  /* Phasor base tokens */
  --ph-graphite:   #16191c;
  --ph-graphite-2: #1f2226;
  --ph-paper:      #f4f1ea;
  --ph-ink:        #e9e6e0;
  --ph-ink-dark:   #1a1a1a;
  --ph-muted:      #7b818a;
  --ph-line:       #2a2e34;
  --ph-line-paper: #d8d2c2;
  --ph-copper:     #c08552;
  --ph-phosphor:   #b8e6a8;
  --ph-arc:        #4dd0c9;
  --ph-hot:        #d94a3b;
  --ph-success:    #7fb069;

  /* Typography */
  --font-display: 'GT America Mono', 'JetBrains Mono', ui-monospace, monospace;
  --font-body:    'Söhne', 'Inter', -apple-system, sans-serif;

  /* Motion */
  --ease-needle:  cubic-bezier(0.22, 1, 0.36, 1);
  --ease-current: cubic-bezier(0.45, 0, 0.55, 1);
  --ease-stamp:   cubic-bezier(0.5, -0.05, 0.4, 1.15);
  --dur-flick:    120ms;
  --dur-settle:   240ms;
  --dur-register: 420ms;
  --dur-sweep:    24s;
  --dur-breath:   4.6s;
  --dur-hum:      18s;

  /* Elevation */
  --elev-ring:   inset 0 0 0 1px var(--ph-line);
  --elev-bright: inset 0 1px 0 0 color-mix(in oklab, var(--ph-ink) 14%, transparent);

  /* Thermal spine (HVAC — cool→warm, scroll-driven) */
  --thermal-temp: 0.15;   /* 0=cold/teal … 1=warm/amber; JS drives this on scroll */
  --thermal-cool-bg:     #0e1418;
  --thermal-warm-bg:     #1a120c;
  --thermal-cool-accent: var(--ph-arc);
  --thermal-warm-accent: var(--ph-copper);
  --thermal-cool-air:    #4dd0c9;
  --thermal-warm-air:    #d97a2a;

  /* LIVE thermal tokens — interpolated by --thermal-temp */
  --thermal-p:      calc(var(--thermal-temp) * 100%);
  --thermal-bg:     color-mix(in oklab, var(--thermal-warm-bg)     var(--thermal-p), var(--thermal-cool-bg));
  --thermal-accent: color-mix(in oklab, var(--thermal-warm-accent) var(--thermal-p), var(--thermal-cool-accent));
  --thermal-air:    color-mix(in oklab, var(--thermal-warm-air)    var(--thermal-p), var(--thermal-cool-air));

  /* Design-b primary exposed */
  --design-b-primary: var(--thermal-accent);
}

/* Expose thermal contract tokens on :root so gate reads them via getComputedStyle(documentElement) */
:root {
  --thermal-temp: 0.15;
  --thermal-accent: #4dd0c9; /* updated live by JS scroll-warming */
  --thermal-bg: #0e1418;     /* updated live by JS scroll-warming */
}

/* ── Page base ── */
[data-design="b"].dq-design {
  background: var(--thermal-bg);
  color: var(--ph-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  overflow-x: clip;
  max-width: 100%;
}
[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 — Header ── */
[data-design="b"] .rf-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--ph-graphite);
  border-bottom: 1px solid var(--ph-line);
}
[data-design="b"] .rf-header__trace {
  position: absolute; inset: auto 0 -1px 0; height: 40px; pointer-events: none;
  opacity: 0.7;
}
[data-design="b"] .rf-header__trace svg { width: 100%; height: 100%; display: block; }
[data-design="b"] .rf-trace__rail { stroke: var(--ph-line); stroke-width: 1; }
[data-design="b"] .rf-trace__wave {
  fill: none;
  stroke: var(--thermal-accent);
  stroke-width: 1.25;
  stroke-linecap: round;
  filter: drop-shadow(0 0 4px color-mix(in oklab, var(--thermal-accent) 60%, transparent));
  stroke-dasharray: 12 8;
  animation: b-trace-shift var(--dur-sweep, 24s) linear infinite;
}
[data-design="b"] .rf-trace__dot {
  fill: var(--thermal-accent);
  filter: drop-shadow(0 0 6px var(--thermal-accent));
}
@keyframes b-trace-shift {
  0%   { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -200; }
}
[data-design="b"] .rf-header__bar {
  position: relative; z-index: 1;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(20px, 4vw, 48px);
  max-width: 1440px; margin: 0 auto;
}
[data-design="b"] .rf-logo {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ph-ink); text-decoration: none;
  font-family: var(--font-display);
  font-size: 14px; letter-spacing: 0.06em; text-transform: uppercase;
}
[data-design="b"] .rf-logo__pin { color: var(--ph-copper); font-size: 9px; }
[data-design="b"] .rf-burger {
  appearance: none; background: transparent;
  border: 1px solid var(--ph-line);
  width: 44px; height: 44px;
  display: inline-flex; flex-direction: column; justify-content: center; align-items: center;
  gap: 5px; cursor: pointer;
  transition: border-color var(--dur-flick) var(--ease-needle);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-burger:hover { border-color: var(--ph-copper); }
}
[data-design="b"] .rf-burger:focus-visible { border-color: var(--ph-copper); outline: none; }
[data-design="b"] .rf-burger__bar {
  display: block; width: 18px; height: 1px; background: var(--ph-ink);
}
[data-design="b"] .rf-drawer {
  position: fixed; inset: 0; background: var(--ph-graphite-2);
  z-index: 60; padding: 96px clamp(20px, 6vw, 80px);
  transform: translateY(-100%);
  transition: transform 320ms var(--ease-needle);
}
[data-design="b"] .rf-drawer:not([hidden]) { transform: translateY(0); }
[data-design="b"] .rf-drawer[hidden] { display: block; pointer-events: none; }
[data-design="b"] .rf-drawer__close {
  position: absolute; top: 24px; right: clamp(20px, 4vw, 48px);
  background: transparent; border: 1px solid var(--ph-line);
  color: var(--ph-ink); font-size: 20px;
  width: 44px; height: 44px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
[data-design="b"] .rf-nav { display: flex; flex-direction: column; gap: 24px; margin-bottom: 40px; }
[data-design="b"] .rf-nav a {
  font-family: var(--font-display);
  font-size: clamp(28px, 6vw, 56px);
  color: var(--ph-ink); text-decoration: none;
  border-bottom: 1px solid var(--ph-line); padding-bottom: 18px;
  letter-spacing: -0.01em;
  transition: color var(--dur-flick) var(--ease-needle);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-nav a:hover { color: var(--ph-copper); }
}
[data-design="b"] .rf-cta--drawer {
  display: inline-flex;
}

/* ── ELEMENT 2 — CTA (copper stud with phosphor pulse) ── */
[data-design="b"] .rf-cta {
  position: relative; display: inline-flex; align-items: center; gap: 14px;
  padding: 16px 22px;
  background: var(--ph-copper); color: var(--ph-graphite);
  font-family: var(--font-display); font-size: 14px;
  letter-spacing: 0.06em; text-transform: uppercase; text-decoration: none;
  border: 1px solid color-mix(in oklab, var(--ph-copper) 80%, #000);
  border-radius: 2px;
  box-shadow: inset 0 1px 0 0 color-mix(in oklab, #fff 22%, transparent);
  overflow: hidden;
  transition: transform var(--dur-flick) var(--ease-needle),
              background var(--dur-flick) var(--ease-needle);
  will-change: transform;
}
[data-design="b"] .rf-cta__plate { font-size: 11px; opacity: 0.7; }
[data-design="b"] .rf-cta__label { letter-spacing: 0.04em; font-weight: 500; }
[data-design="b"] .rf-cta__arrow {
  display: inline-flex;
  transition: transform var(--dur-flick) var(--ease-needle);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-cta:hover { background: color-mix(in oklab, var(--ph-copper) 90%, #fff); }
  [data-design="b"] .rf-cta:hover .rf-cta__arrow { transform: rotate(8deg) translateX(2px); }
}
[data-design="b"] .rf-cta:focus-visible {
  outline: 2px solid var(--ph-phosphor); outline-offset: 3px;
}
[data-design="b"] .rf-cta:active {
  transform: translateY(1px) scale(0.997);
  box-shadow: inset 0 1px 0 0 color-mix(in oklab, #000 28%, transparent);
}
[data-design="b"] .rf-cta__pulse {
  position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--ph-phosphor) 40%, var(--ph-phosphor) 60%, transparent 100%);
  filter: drop-shadow(0 0 6px var(--ph-phosphor));
  transform: translateX(-100%);
  animation: b-cta-pulse 4.6s var(--ease-current) infinite;
}
@keyframes b-cta-pulse {
  0%   { transform: translateX(-100%); opacity: 0; }
  20%  { opacity: 1; }
  80%  { opacity: 1; }
  100% { transform: translateX(100%); opacity: 0; }
}

/* ── HERO ── */
[data-design="b"] .b-hero {
  position: relative;
  min-height: 80vh;
  display: flex; align-items: center;
  overflow: hidden;
  isolation: isolate;  /* HARD: hero text z-index above all backdrop */
}

/* Thermal backdrop canvas (Element 3) */
[data-design="b"] .b-hero__backdrop {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
}
[data-design="b"] .b-hero__canvas {
  width: 100%; height: 100%; display: block;
}

/* ELEMENT 5 — Airflow signature SVG (Site B, ambient, tinted by --thermal-temp) */
[data-design="b"] .b-airflow {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  opacity: 0.55;
}
[data-design="b"] .b-airflow__svg { width: 100%; height: 100%; display: block; }
[data-design="b"] .b-duct-line {
  stroke: var(--thermal-air);
  stroke-width: 1;
  fill: none;
  opacity: 0.4;
}
[data-design="b"] .b-vent-notch {
  fill: none;
  stroke: var(--thermal-air);
  stroke-width: 1;
  opacity: 0.5;
}
/* Air particles animated via JS (transform only, GPU-cheap) */
[data-design="b"] .b-air-particle {
  fill: var(--thermal-air);
  filter: drop-shadow(0 0 4px var(--thermal-air));
  opacity: 0.85;
}

/* Hero content — z-index ABOVE both backdrop layers */
[data-design="b"] .b-hero__content {
  position: relative; z-index: 10;
  max-width: 1280px; margin: 0 auto;
  padding: clamp(80px, 12vw, 160px) clamp(20px, 4vw, 48px);
  display: flex; flex-direction: column; gap: 24px;
  align-items: flex-start;
}
[data-design="b"] .b-kicker {
  font-family: var(--font-display); font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ph-copper); margin: 0;
  opacity: 1;
}
[data-design="b"] .b-headline {
  font-family: var(--font-display);
  font-size: clamp(32px, 5.5vw, 72px); line-height: 1.05;
  letter-spacing: -0.02em; color: var(--ph-ink);
  margin: 0; max-width: 16ch;
  opacity: 1;
}
[data-design="b"] .b-subtitle {
  font-family: var(--font-body); font-size: clamp(16px, 2vw, 20px);
  line-height: 1.55; color: var(--ph-muted);
  max-width: 52ch; margin: 0;
  opacity: 1;
}

/* Emergency CTA (emergency_available: true) */
[data-design="b"] .b-emergency-cta {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 18px 28px;
  background: var(--thermal-accent);
  color: var(--ph-graphite);
  font-family: var(--font-display); font-size: 16px;
  letter-spacing: 0.06em; text-transform: uppercase; text-decoration: none;
  border: 2px solid color-mix(in oklab, var(--thermal-accent) 70%, #000);
  border-radius: 2px;
  font-weight: 700;
  min-height: 56px;
  transition: background var(--dur-flick) var(--ease-needle);
  opacity: 1;
}
[data-design="b"] .b-emergency-cta__icon { font-size: 20px; }
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .b-emergency-cta:hover {
    background: color-mix(in oklab, var(--thermal-accent) 85%, #fff);
  }
}
[data-design="b"] .b-emergency-cta:focus-visible {
  outline: 2px solid var(--ph-phosphor); outline-offset: 3px;
}

/* Trust chip */
[data-design="b"] .b-trust-chip {
  font-family: var(--font-display); font-size: 12px;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ph-muted); margin: 0;
  opacity: 1;
}

/* ── ELEMENT 6 — Pointer (thermal isotherm, between hero and #funnel) ── */
[data-design="b"] .b-pointer {
  display: flex; flex-direction: column; align-items: center; gap: 16px;
  padding: 40px clamp(20px, 4vw, 48px) 32px;
  max-width: 1280px; margin: 0 auto;
  /* Gate: computed opacity > 0.5, height > 8px */
  opacity: 1;
  min-height: 80px;
}
[data-design="b"] .b-pointer__isotherm {
  width: 100%; max-width: 800px;
}
[data-design="b"] .b-pointer__svg { width: 100%; height: 60px; display: block; }
[data-design="b"] .b-pointer__rail {
  stroke: var(--ph-line); stroke-width: 1; fill: none;
}
[data-design="b"] .b-pointer__warm-fill {
  stroke: var(--thermal-air);
  stroke-width: 2.5; fill: none;
  filter: drop-shadow(0 0 5px color-mix(in oklab, var(--thermal-air) 60%, transparent));
  stroke-dasharray: 600;
  stroke-dashoffset: 0;
  animation: b-isotherm-draw 3.2s var(--ease-current) infinite;
}
@keyframes b-isotherm-draw {
  0%   { stroke-dashoffset: 600; opacity: 0.3; }
  40%  { opacity: 1; }
  80%  { stroke-dashoffset: 0; opacity: 0.9; }
  100% { stroke-dashoffset: -20; opacity: 0.3; }
}
[data-design="b"] .b-pointer__dot {
  fill: var(--thermal-air);
  filter: drop-shadow(0 0 8px var(--thermal-air));
  opacity: 1;
}
[data-design="b"] .b-pointer__label {
  font-family: var(--font-display); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ph-muted); margin: 0;
  opacity: 1;
}

/* ── ELEMENT 5 / Funnel (#funnel) ── */
[data-design="b"] .b-funnel-section {
  background: var(--ph-paper); color: var(--ph-ink-dark);
  padding: clamp(64px, 9vw, 128px) clamp(20px, 4vw, 48px);
  /* Scroll: this is the warm end of the thermal spine */
}
[data-design="b"] .rf-qual {
  max-width: 720px; margin: 0 auto;
  background: var(--ph-paper);
  border: 1px solid var(--ph-line-paper);
  padding: clamp(28px, 4vw, 48px);
}
[data-design="b"] .rf-qual__plate {
  font-family: var(--font-display); font-size: 11px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--ph-copper);
  margin: 0 0 12px 0;
}
[data-design="b"] .rf-qual__title {
  font-family: var(--font-display); font-size: clamp(20px, 3vw, 32px);
  line-height: 1.15; letter-spacing: -0.015em; color: var(--ph-ink-dark);
  margin: 0 0 20px 0;
}
[data-design="b"] .rf-qual__pips {
  display: flex; gap: 6px; list-style: none; padding: 0; margin: 0 0 32px 0;
}
[data-design="b"] .rf-qual__pips li {
  height: 2px; flex: 1; background: var(--ph-line-paper);
  position: relative; overflow: hidden;
}
[data-design="b"] .rf-qual__pips li.is-active { background: var(--ph-copper); }
[data-design="b"] .rf-qual__pips li.is-active::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, var(--ph-phosphor), transparent);
  transform: translateX(-100%);
  animation: b-pip-trace 1.2s var(--ease-current);
}
@keyframes b-pip-trace {
  to { transform: translateX(100%); }
}
[data-design="b"] .rf-qual__step {
  border: 0; padding: 0; margin: 0;
  display: none;
  opacity: 1;
  transform: translateY(8px);
  transition: opacity 280ms var(--ease-needle), transform 280ms var(--ease-needle);
}
[data-design="b"] .rf-qual__step.is-active {
  display: block; opacity: 1; transform: translateY(0);
}
[data-design="b"] .rf-qual__legend {
  font-family: var(--font-display); font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--ph-muted);
  margin-bottom: 18px;
}
[data-design="b"] .rf-qual__opts {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
[data-design="b"] .rf-qual__opts label {
  position: relative; cursor: pointer;
  border: 1px solid var(--ph-line-paper);
  padding: 16px 18px;
  font-family: var(--font-display); font-size: 13px;
  letter-spacing: 0.04em;
  background: color-mix(in oklab, var(--ph-paper) 96%, #000);
  transition: border-color var(--dur-flick) var(--ease-needle),
              background var(--dur-flick) var(--ease-needle);
  min-height: 44px; display: flex; align-items: center;
}
[data-design="b"] .rf-qual__opts input {
  position: absolute; opacity: 0; inset: 0; cursor: pointer; width: 100%; height: 100%;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-qual__opts label:hover { border-color: var(--ph-copper); }
}
[data-design="b"] .rf-qual__opts label:has(input:checked) {
  border-color: var(--ph-copper);
  background: color-mix(in oklab, var(--ph-copper) 14%, var(--ph-paper));
  box-shadow: inset 3px 0 0 0 var(--ph-copper);
}
[data-design="b"] .rf-qual__opts label:focus-within {
  outline: 2px solid var(--ph-copper); outline-offset: 2px;
}

/* Emergency fast-path inside funnel */
[data-design="b"] .b-urgency--emergency { order: -1; }
[data-design="b"] .b-emergency-fast {
  margin-top: 20px; padding: 20px;
  background: color-mix(in oklab, var(--ph-copper) 12%, var(--ph-paper));
  border: 1px solid var(--ph-copper);
  border-radius: 2px;
}
[data-design="b"] .b-emergency-fast__label {
  font-family: var(--font-display); font-size: 12px;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ph-ink-dark); margin: 0 0 10px 0;
}
[data-design="b"] .b-emergency-fast__call {
  display: block;
  font-family: var(--font-display); font-size: clamp(22px, 4vw, 32px);
  color: var(--ph-copper); text-decoration: none; font-weight: 700;
  letter-spacing: -0.01em;
}

[data-design="b"] .rf-qual__summary {
  font-family: var(--font-display); font-size: 12px;
  letter-spacing: 0.06em; color: var(--ph-muted);
  border: 1px solid var(--ph-line-paper); padding: 14px 16px;
  margin-bottom: 22px; min-height: 44px;
}
[data-design="b"] .rf-qual__fields {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px;
}
[data-design="b"] .rf-field { display: flex; flex-direction: column; gap: 6px; }
[data-design="b"] .rf-field__lbl {
  font-family: var(--font-display); font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--ph-muted);
}
[data-design="b"] .rf-field input {
  background: transparent; color: var(--ph-ink-dark);
  border: 0; border-bottom: 1px solid var(--ph-line-paper);
  padding: 10px 0; font-family: var(--font-body); font-size: 16px;
  transition: border-color 240ms var(--ease-needle);
  border-radius: 0;
}
[data-design="b"] .rf-field input:focus {
  outline: none; border-bottom-color: var(--ph-copper);
}
[data-design="b"] .b-funnel-note {
  font-family: var(--font-body); font-size: 14px; color: var(--ph-muted);
  margin-bottom: 16px; line-height: 1.5;
}
[data-design="b"] .rf-cta--paper {
  background: var(--ph-graphite); color: var(--ph-paper);
  border-color: var(--ph-graphite);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-cta--paper:hover {
    background: color-mix(in oklab, var(--ph-graphite) 86%, var(--ph-copper));
  }
}
[data-design="b"] .rf-qual__fineprint {
  font-family: var(--font-display); font-size: 11px;
  letter-spacing: 0.04em; color: var(--ph-muted);
  margin-top: 14px;
}

/* ── ELEMENT 4 — Services + thermal zone topology ── */
[data-design="b"] .b-services-section {
  background: var(--thermal-bg);
  display: grid; gap: clamp(32px, 6vw, 96px);
  grid-template-columns: 1.2fr 1fr;
  padding: clamp(80px, 9vw, 128px) clamp(20px, 4vw, 48px);
  max-width: 1440px; margin: 0 auto;
  border-top: 1px solid var(--ph-line);
}
[data-design="b"] .rf-kicker {
  font-family: var(--font-display); font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ph-copper); margin: 0 0 24px 0;
}
[data-design="b"] .rf-h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 56px); line-height: 1.1; letter-spacing: -0.015em;
  color: var(--ph-ink); margin: 0 0 36px 0;
}
[data-design="b"] .rf-services {
  list-style: none; padding: 0; margin: 0;
  border-top: 1px solid var(--ph-line);
}
[data-design="b"] .rf-services li {
  display: grid; grid-template-columns: 48px 1fr auto; gap: 18px;
  align-items: baseline;
  padding: 22px 4px;
  border-bottom: 1px solid var(--ph-line);
  font-family: var(--font-body); color: var(--ph-ink);
  transition: background var(--dur-flick) var(--ease-needle);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-services li:hover {
    background: color-mix(in oklab, var(--ph-graphite-2) 70%, transparent);
  }
}
[data-design="b"] .rf-services li .num {
  font-family: var(--font-display); color: var(--ph-copper);
  font-size: 12px; letter-spacing: 0.06em;
}
[data-design="b"] .rf-services li .name { font-size: 18px; }
[data-design="b"] .rf-services li .spec {
  font-family: var(--font-display); color: var(--ph-muted); font-size: 12px;
  letter-spacing: 0.04em; text-transform: uppercase;
}
[data-design="b"] .rf-ambient-b__topo {
  align-self: center; justify-self: stretch;
  background: var(--ph-graphite-2);
  box-shadow: inset 0 0 0 1px var(--ph-line),
              inset 0 1px 0 0 color-mix(in oklab, #fff 8%, transparent);
  padding: 24px;
}
[data-design="b"] .rf-ambient-b__topo svg { width: 100%; height: auto; display: block; }
[data-design="b"] .rf-topo__paths path { fill: none; stroke: var(--ph-line); stroke-width: 1.25; }
[data-design="b"] .rf-topo__paths path.is-live {
  stroke: var(--thermal-air);
  filter: drop-shadow(0 0 4px color-mix(in oklab, var(--thermal-air) 60%, transparent));
  transition: stroke 200ms var(--ease-needle);
}
[data-design="b"] .rf-topo__nodes circle {
  fill: var(--ph-graphite-2); stroke: var(--ph-line); stroke-width: 1.5;
  transition: fill 200ms var(--ease-needle), stroke 200ms var(--ease-needle);
}
[data-design="b"] .rf-topo__nodes circle.is-live {
  fill: var(--thermal-air); stroke: var(--thermal-air);
  filter: drop-shadow(0 0 8px var(--thermal-air));
}
[data-design="b"] .rf-topo__labels text {
  font-family: var(--font-display); font-size: 9px; fill: var(--ph-muted);
  letter-spacing: 0.08em; text-transform: uppercase;
}

/* ── About section ── */
[data-design="b"] .b-about {
  padding: clamp(80px, 9vw, 128px) clamp(20px, 4vw, 48px);
  border-top: 1px solid var(--ph-line);
}
[data-design="b"] .b-about__inner {
  max-width: 800px; margin: 0 auto;
}
[data-design="b"] .b-about__body {
  font-size: 17px; line-height: 1.7; color: var(--ph-muted);
  max-width: 68ch; margin: 0 0 32px 0;
}
[data-design="b"] .b-about__chips {
  display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px;
}
[data-design="b"] .b-chip {
  font-family: var(--font-display); font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase;
  border: 1px solid var(--ph-line); padding: 8px 14px;
  color: var(--ph-muted);
}
[data-design="b"] .b-about__cta {
  display: inline-flex; align-items: center;
  font-family: var(--font-display); font-size: clamp(22px, 3.5vw, 36px);
  color: var(--ph-copper); text-decoration: none; letter-spacing: -0.01em;
  border-bottom: 1px solid color-mix(in oklab, var(--ph-copper) 40%, transparent);
  padding-bottom: 4px;
  transition: color var(--dur-flick) var(--ease-needle);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .b-about__cta:hover { color: var(--ph-phosphor); }
}

/* ── Footer ── */
[data-design="b"] .b-footer {
  background: var(--ph-graphite-2);
  border-top: 1px solid var(--ph-line);
  padding: 48px clamp(20px, 4vw, 48px);
}
[data-design="b"] .b-footer__inner {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 2fr 1fr; gap: 32px;
  align-items: start;
}
[data-design="b"] .b-footer__left {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-size: 13px;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ph-ink);
}
[data-design="b"] .b-footer__center {
  font-family: var(--font-display); font-size: 12px;
  letter-spacing: 0.04em; color: var(--ph-muted);
  text-align: center;
}
[data-design="b"] .b-footer__center p { margin: 4px 0; }
[data-design="b"] .b-footer__center a { color: var(--ph-copper); text-decoration: none; }
[data-design="b"] .b-footer__right {
  text-align: right;
}
[data-design="b"] .b-footer__copy {
  font-family: var(--font-display); font-size: 11px;
  letter-spacing: 0.06em; color: var(--ph-muted);
}

/* ══════════════════════════════════════════════
   REDUCED MOTION — all animations + transitions
   ══════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-trace__wave,
  [data-design="b"] .rf-cta__pulse,
  [data-design="b"] .b-pointer__warm-fill,
  [data-design="b"] .b-isotherm-draw { animation: none; }
  [data-design="b"] .rf-trace__dot animateMotion { display: none; }
  [data-design="b"] .rf-drawer { transition: none; }
  [data-design="b"] .rf-cta__arrow { transition: none; }
  [data-design="b"] .rf-qual__step { transition: none; transform: none; }
  [data-design="b"] .rf-qual__pips li.is-active::after { animation: none; }
  [data-design="b"] .rf-topo__paths path,
  [data-design="b"] .rf-topo__nodes circle { transition: none; }
  /* Airflow: resolved to a valid static thermally-tinted frame */
  [data-design="b"] .b-air-particle { opacity: 0.5; }
  [data-design="b"] .b-pointer__dot { opacity: 0.7; }
}

/* ══════════════════════════════════════════════
   MOBILE — scoped to .dq-design to avoid chrome-kit modal conflicts
   All rules under [data-design="b"].dq-design to prevent body[data-design] leaking
   ══════════════════════════════════════════════ */
[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; }

@media (max-width: 880px) {
  [data-design="b"] .b-services-section {
    grid-template-columns: 1fr;
  }
  [data-design="b"] .b-footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  [data-design="b"] .b-footer__right { text-align: center; }
  [data-design="b"] .b-footer__left { justify-content: center; }
}

@media (max-width: 560px) {
  [data-design="b"] .rf-qual__opts { grid-template-columns: 1fr; }
  [data-design="b"] .rf-qual__fields { grid-template-columns: 1fr; }
  [data-design="b"] .b-hero__content { padding: 64px 18px; }
  [data-design="b"] .b-pointer { padding: 32px 18px 24px; }
  [data-design="b"] .rf-header__bar { padding: 14px 18px; }
  [data-design="b"] .b-about__body { font-size: 16px; }
  [data-design="b"] .rf-services li { grid-template-columns: 36px 1fr; }
  [data-design="b"] .rf-services li .spec { display: none; }
}

/* 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; }