/* ═══════════════════════════════════════════════════════════
   Cleveland Flat Roofing — Design B (Catenary)
   Slot scope: [data-design="b"] — ZERO [data-design="b"].dq-design selectors
   Tokens: --cat-* (design system tokens, slot-independent)
   Primary alias: --design-b-primary = var(--cat-orange)
   ═══════════════════════════════════════════════════════════ */

/* ── TOKEN LAYER ─────────────────────────────────────────── */
[data-design="b"] {
  --design-b-primary: #E9601F;

  /* Color */
  --cat-bg:        #F2EFE7;
  --cat-surface:   #FAF8F3;
  --cat-ink:       #1A1816;
  --cat-graphite:  #44413C;
  --cat-stone:     #6B6760;
  --cat-hairline:  #4A4742;
  --cat-mist:      #D7D2C6;
  --cat-orange:    #E9601F;
  --cat-cyan:      #5C8AA8;
  --cat-red:       #BE2D1F;
  --cat-olive:     #5F6748;

  /* Typography */
  --cat-font-display: "Inter Tight", "Helvetica Neue", -apple-system, system-ui, sans-serif;
  --cat-font-body:    "Inter", -apple-system, system-ui, sans-serif;
  --cat-font-mono:    ui-monospace, "JetBrains Mono", "DIN Mono", "Roboto Mono", Menlo, monospace;

  /* Spacing */
  --cat-s-bolt:   4px;
  --cat-s-rivet:  8px;
  --cat-s-stud:  12px;
  --cat-s-joist: 16px;
  --cat-s-beam:  24px;
  --cat-s-bay:   36px;
  --cat-s-span:  60px;
  --cat-s-frame: 96px;
  --cat-s-grid: 144px;

  /* Motion */
  --cat-d-quick:  140ms;
  --cat-d-base:   220ms;
  --cat-d-settle: 520ms;
  --cat-d-span:    18s;
  --cat-ease-settle:   cubic-bezier(.22,.61,.36,1);
  --cat-ease-register: cubic-bezier(.5,.05,.5,1);
  --cat-ease-unfurl:   cubic-bezier(.16,1,.3,1);

  /* Radius */
  --cat-r-none: 0px;
  --cat-r-edge: 2px;
  --cat-r-pill: 999px;
}

/* ── GLOBAL CONTAINMENT (chrome-kit anti-leak guards) ─────── */
[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;
}

/* ── BODY RESET (scoped) ──────────────────────────────────── */
[data-design="b"] {
  background: var(--cat-bg);
  color: var(--cat-ink);
  font-family: var(--cat-font-body);
  font-size: 17px;
  line-height: 1.6;
}

/* ════════════════════════════════════════════════════════════
   E1 — ANIMATED MINIMALIST HEADER
   ════════════════════════════════════════════════════════════ */

[data-design="b"] .rf-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--cat-bg);
  border-bottom: 1px solid var(--cat-mist);
}

/* Catenary chain (atmospheric layer) */
[data-design="b"] .rf-chain {
  position: absolute; inset: 0 0 auto 0; height: 100%;
  pointer-events: none; overflow: hidden;
}
[data-design="b"] .rf-chain svg { width: 100%; height: 100%; display: block; }
[data-design="b"] .rf-chain__curve {
  fill: none; stroke: var(--cat-hairline); stroke-width: .75;
  vector-effect: non-scaling-stroke;
  transform-origin: 50% 0%; transform-box: fill-box;
  animation: cat-chain-settle var(--cat-d-span) var(--cat-ease-settle) infinite alternate;
}
[data-design="b"] .rf-chain__curve--2 {
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 35%);
  animation-duration: 22s; animation-delay: -6s;
}
[data-design="b"] .rf-chain__curve--3 {
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 60%);
  animation-duration: 31s; animation-delay: -12s;
}
[data-design="b"] .rf-chain__pin { fill: var(--cat-orange); }

@keyframes cat-chain-settle {
  0%   { transform: scaleY(0.96) translateY(0); }
  50%  { transform: scaleY(1.04) translateY(2px); }
  100% { transform: scaleY(0.98) translateY(-1px); }
}

[data-design="b"] .rf-header__bar {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--cat-s-stud) clamp(16px, 4vw, 36px);
  max-width: 1440px; margin-inline: auto;
}
[data-design="b"] .rf-logo { text-decoration: none; color: var(--cat-ink); }
[data-design="b"] .rf-logo__mark {
  font-family: var(--cat-font-display);
  font-size: 18px; font-weight: 600; letter-spacing: -0.01em;
}

/* Hamburger */
[data-design="b"] .rf-burger {
  background: transparent; border: 1px solid var(--cat-hairline);
  width: 44px; height: 44px; padding: 0; cursor: pointer;
  display: grid; place-content: center; gap: 4px;
  border-radius: var(--cat-r-edge);
  transition: border-color var(--cat-d-quick) var(--cat-ease-register);
}
[data-design="b"] .rf-burger span {
  display: block; width: 18px; height: 1px; background: var(--cat-ink);
  transition:
    transform var(--cat-d-base) var(--cat-ease-register),
    opacity var(--cat-d-quick) linear;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-burger:hover { border-color: var(--cat-orange); }
}
[data-design="b"] .rf-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
[data-design="b"] .rf-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
[data-design="b"] .rf-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* Drawer */
[data-design="b"] .rf-drawer {
  position: fixed; inset: 64px 0 0 0; background: var(--cat-bg);
  border-top: 1px solid var(--cat-hairline);
  overflow-y: auto;
  z-index: 39;
}
[data-design="b"] .rf-drawer[hidden] { display: none; }
[data-design="b"] .rf-drawer__inner {
  max-width: 1440px; margin-inline: auto;
  padding: var(--cat-s-frame) clamp(16px, 4vw, 36px);
  display: flex; flex-direction: column; gap: var(--cat-s-beam);
}
[data-design="b"] .rf-drawer a {
  font-family: var(--cat-font-mono); text-transform: uppercase; letter-spacing: 0.08em;
  font-size: clamp(18px, 4vw, 28px); color: var(--cat-ink); text-decoration: none;
  padding: var(--cat-s-stud) 0; border-bottom: 1px solid var(--cat-mist);
  display: grid; grid-template-columns: 56px 1fr; gap: var(--cat-s-beam); align-items: baseline;
}
[data-design="b"] .rf-drawer a::before {
  content: attr(data-num); color: var(--cat-orange); font-size: .72em;
}
[data-design="b"] .rf-drawer__tel {
  color: var(--cat-graphite);
}
[data-design="b"] .rf-drawer__cta {
  display: inline-flex;
  background: var(--cat-orange); color: var(--cat-bg);
  padding: var(--cat-s-stud) var(--cat-s-beam);
  border-radius: var(--cat-r-edge);
  font-size: 14px;
  border: none;
  margin-top: var(--cat-s-stud);
}
[data-design="b"] .rf-drawer__cta::before { display: none; }

/* ════════════════════════════════════════════════════════════
   E3 (UNIQUE HERO) + E2 (CTA) — HERO SECTION
   isolation:isolate so hero text is always top-most paint
   ════════════════════════════════════════════════════════════ */

[data-design="b"] .rf-hero {
  position: relative;
  isolation: isolate;
  min-height: clamp(480px, 72vh, 780px);
  display: flex; align-items: center;
  overflow: hidden;
  background: var(--cat-bg);
  border-bottom: 1px solid var(--cat-mist);
}

/* Backdrop — roof-plane assembly SVG (E3 unique animated hero) */
[data-design="b"] .rf-hero__backdrop {
  position: absolute; inset: 0; z-index: 0;
  pointer-events: none;
}
[data-design="b"] .rf-roof-draw {
  width: 100%; height: 100%;
  display: block;
}

/* Ridgeline draws left to right on load */
[data-design="b"] .rf-ridge {
  stroke: var(--cat-hairline);
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
  fill: none;
  stroke-dasharray: 1040;
  stroke-dashoffset: 1040;
  animation: cat-ridge-draw 1.8s var(--cat-ease-unfurl) forwards,
             cat-ridge-pulse 12s ease-in-out 2s infinite alternate;
}
@keyframes cat-ridge-draw {
  to { stroke-dashoffset: 0; }
}
@keyframes cat-ridge-pulse {
  0%   { opacity: 0.55; }
  50%  { opacity: 0.85; }
  100% { opacity: 0.6; }
}

/* Rake lines fade in after ridge */
[data-design="b"] .rf-rake {
  stroke: var(--cat-hairline); stroke-width: 1;
  vector-effect: non-scaling-stroke; fill: none;
  opacity: 0;
  animation: cat-rake-in 0.6s var(--cat-ease-settle) 1.6s forwards;
}
@keyframes cat-rake-in {
  to { opacity: 0.5; }
}

/* Eave line */
[data-design="b"] .rf-eave {
  stroke: var(--cat-hairline); stroke-width: 1;
  vector-effect: non-scaling-stroke; fill: none;
  stroke-dasharray: 1040; stroke-dashoffset: 1040;
  animation: cat-eave-draw 1s var(--cat-ease-unfurl) 1.7s forwards;
}
@keyframes cat-eave-draw {
  to { stroke-dashoffset: 0; }
}

/* Courses laying in, eave to ridge, staggered */
[data-design="b"] .rf-course {
  fill: var(--cat-hairline);
  opacity: 0;
  transform-origin: left center;
  transform: scaleX(0);
}
[data-design="b"] .rf-course--1 { animation: cat-course-in 0.5s var(--cat-ease-settle) 2.0s forwards; }
[data-design="b"] .rf-course--2 { animation: cat-course-in 0.5s var(--cat-ease-settle) 2.2s forwards; }
[data-design="b"] .rf-course--3 { animation: cat-course-in 0.5s var(--cat-ease-settle) 2.4s forwards; }
[data-design="b"] .rf-course--4 { animation: cat-course-in 0.5s var(--cat-ease-settle) 2.6s forwards; }
[data-design="b"] .rf-course--5 { animation: cat-course-in 0.5s var(--cat-ease-settle) 2.8s forwards; }
[data-design="b"] .rf-course--6 { animation: cat-course-in 0.5s var(--cat-ease-settle) 3.0s forwards; }
@keyframes cat-course-in {
  from { opacity: 0; transform: scaleX(0); }
  to   { opacity: 0.12; transform: scaleX(1); }
}

/* Stress arc isobars — ambient life after arrival */
[data-design="b"] .rf-arc {
  fill: none; stroke: var(--cat-cyan); stroke-width: 0.75;
  vector-effect: non-scaling-stroke;
  stroke-dasharray: 6 8;
  opacity: 0;
}
[data-design="b"] .rf-arc--1 { animation: cat-arc-in 1s ease-out 3.2s forwards, cat-arc-flow 14s linear 4.2s infinite; }
[data-design="b"] .rf-arc--2 { animation: cat-arc-in 1s ease-out 3.5s forwards, cat-arc-flow 14s linear 4.5s infinite; animation-delay: 3.5s, 4.5s; }
[data-design="b"] .rf-arc--3 { animation: cat-arc-in 1s ease-out 3.8s forwards, cat-arc-flow 14s linear 4.8s infinite; animation-delay: 3.8s, 4.8s; }
@keyframes cat-arc-in {
  to { opacity: 0.28; }
}
@keyframes cat-arc-flow {
  0%   { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -56; }
}

/* Dimension lines */
[data-design="b"] .rf-dim {
  stroke: var(--cat-stone); stroke-width: 0.75;
  vector-effect: non-scaling-stroke; fill: none;
  opacity: 0.35;
}
[data-design="b"] .rf-dim__label {
  font-family: var(--cat-font-mono); font-size: 11px;
  fill: var(--cat-stone); letter-spacing: 0.12em;
  opacity: 0.45;
}

/* Registration marks */
[data-design="b"] .rf-reg line {
  stroke: var(--cat-orange); stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
  opacity: 0;
  animation: cat-reg-snap 0.2s var(--cat-ease-register) 1.9s forwards;
}
@keyframes cat-reg-snap {
  to { opacity: 0.9; }
}

/* Hero content (above backdrop — explicit z-index) */
[data-design="b"] .rf-hero__content {
  position: relative;
  z-index: 10;
  max-width: 1280px;
  margin-inline: auto;
  padding: clamp(64px, 10vh, 120px) clamp(20px, 5vw, 60px);
  width: 100%;
}

[data-design="b"] .rf-eyebrow-hero {
  font-family: var(--cat-font-mono); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--cat-orange);
  margin: 0 0 var(--cat-s-beam); opacity: 1;
}

[data-design="b"] .rf-hero__headline {
  font-family: var(--cat-font-display);
  font-size: clamp(32px, 6vw, 72px);
  font-weight: 600; letter-spacing: -0.02em; line-height: 1.05;
  color: var(--cat-ink);
  max-width: 18ch;
  margin: 0 0 var(--cat-s-beam);
  opacity: 1;
}

[data-design="b"] .rf-hero__subtitle {
  font-family: var(--cat-font-body);
  font-size: clamp(15px, 2vw, 20px);
  color: var(--cat-graphite); line-height: 1.5;
  margin: 0 0 var(--cat-s-stud);
  opacity: 1;
}

[data-design="b"] .rf-hero__proof {
  font-family: var(--cat-font-mono); font-size: 13px;
  letter-spacing: 0.08em; color: var(--cat-stone);
  margin: 0 0 var(--cat-s-span);
  opacity: 1;
}

/* CTA wrap */
[data-design="b"] .rf-hero__cta-wrap {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--cat-s-beam);
  opacity: 1;
}

/* ════════════════════════════════════════════════════════════
   E2 — ANIMATED CTA (tensor)
   ════════════════════════════════════════════════════════════ */

[data-design="b"] .rf-cta {
  display: inline-flex; align-items: center; gap: var(--cat-s-stud);
  padding: 14px 22px;
  background: var(--cat-orange); color: var(--cat-bg);
  font-family: var(--cat-font-mono); text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 13px; font-weight: 500; text-decoration: none;
  border: none; border-radius: var(--cat-r-edge);
  position: relative;
  transition:
    background-color var(--cat-d-quick) var(--cat-ease-register),
    transform var(--cat-d-quick) var(--cat-ease-register);
  animation: cat-cta-breath 4.5s var(--cat-ease-settle) infinite;
  will-change: transform;
  cursor: pointer;
}
[data-design="b"] .rf-cta::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px;
  background: var(--cat-ink); opacity: 0;
  transition: opacity var(--cat-d-quick) linear;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-cta:hover {
    background: color-mix(in oklab, var(--cat-orange), black 8%);
  }
  [data-design="b"] .rf-cta:hover .rf-cta__cable-line {
    transform: translateY(-1px);
  }
}
[data-design="b"] .rf-cta:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--cat-orange), transparent 70%);
}
[data-design="b"] .rf-cta:active {
  transform: translateY(1px);
}
[data-design="b"] .rf-cta:active::after { opacity: 1; }
[data-design="b"] .rf-cta--sm {
  padding: 10px 16px; font-size: 12px;
}
[data-design="b"] .rf-cta--hero {
  font-size: 14px; padding: 16px 28px;
}

[data-design="b"] .rf-cta__cable {
  width: 44px; height: 16px; overflow: visible;
}
[data-design="b"] .rf-cta__cable-line,
[data-design="b"] .rf-cta__cable-head {
  fill: none; stroke: currentColor; stroke-width: 1.5;
  stroke-linecap: round; stroke-linejoin: round;
  transition: transform var(--cat-d-base) var(--cat-ease-unfurl);
}

@keyframes cat-cta-breath {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.012); }
}

/* ════════════════════════════════════════════════════════════
   E6 — POINTER (water-shed / roofline dimension-line register)
   Must be LAST element before #funnel
   ════════════════════════════════════════════════════════════ */

[data-design="b"] .rf-pointer {
  display: flex;
  justify-content: center;
  padding: clamp(40px, 8vw, 80px) 16px clamp(56px, 10vw, 96px);
  background: var(--cat-bg);
}
[data-design="b"] .b-pointer__hit {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--cat-graphite);
}
[data-design="b"] .b-pointer__tick {
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}
[data-design="b"] .b-pointer__rule {
  display: block;
  width: 1px;
  height: 56px;
  background: currentColor;
  transform-origin: top center;
  animation: cat-pointer-extend 5s ease-in-out infinite;
}
[data-design="b"] .b-pointer__label {
  font-family: var(--cat-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.72;
  animation: cat-pointer-stamp 5s ease-in-out infinite;
}
@keyframes cat-pointer-extend {
  0%, 100% { transform: scaleY(0.4); opacity: 0.4; }
  50%      { transform: scaleY(1);   opacity: 0.85; }
}
@keyframes cat-pointer-stamp {
  0%, 25%, 100% { opacity: 0.25; }
  50%, 75%      { opacity: 0.85; }
}

/* ════════════════════════════════════════════════════════════
   E5 — 5-STEP QUALIFYING FUNNEL (Load Cases)
   ════════════════════════════════════════════════════════════ */

[data-design="b"] .rf-interactive {
  background: var(--cat-bg); padding-block: var(--cat-s-frame);
  border-top: 1px solid var(--cat-hairline);
}
[data-design="b"] .rf-funnel__head,
[data-design="b"] .rf-funnel,
[data-design="b"] .rf-funnel__beam {
  max-width: 880px; margin-inline: auto; padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="b"] .rf-funnel__sub {
  font-family: var(--cat-font-body); font-size: 18px; color: var(--cat-graphite);
  margin: 0 0 var(--cat-s-span); max-width: 56ch; line-height: 1.6;
}

/* Progress beam */
[data-design="b"] .rf-funnel__beam {
  position: relative; height: 8px; background: var(--cat-mist);
  margin-bottom: var(--cat-s-span); border-radius: var(--cat-r-edge);
}
[data-design="b"] .rf-beam__fill {
  position: absolute; inset: 0 auto 0 0; width: 100%;
  transform: scaleX(0); transform-origin: left;
  background: var(--cat-orange);
  transition: transform var(--cat-d-settle) var(--cat-ease-settle);
  border-radius: var(--cat-r-edge);
}
[data-design="b"] .rf-beam__ticks {
  position: absolute; inset: 16px 0 auto 0;
  display: grid; grid-template-columns: repeat(5, 1fr);
  list-style: none; margin: 0; padding: 0;
  font-family: var(--cat-font-mono); font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--cat-stone);
}
[data-design="b"] .rf-beam__ticks li {
  position: relative; padding-top: 8px; padding-left: 4px;
  border-top: 1px solid var(--cat-hairline);
}
[data-design="b"] .rf-beam__ticks li span { color: var(--cat-orange); margin-right: 4px; }

/* Steps */
[data-design="b"] .rf-funnel {
  position: relative; border: 1px solid var(--cat-hairline);
  background: var(--cat-surface); border-radius: var(--cat-r-edge);
  padding: var(--cat-s-span); min-height: 360px; overflow: hidden;
}
[data-design="b"] .rf-step {
  border: 0; padding: 0; margin: 0;
  display: none;
  animation: cat-step-unfurl var(--cat-d-settle) var(--cat-ease-unfurl) both;
}
[data-design="b"] .rf-step.is-active { display: block; }
[data-design="b"] .rf-step.is-leaving {
  display: block;
  animation: cat-step-settle var(--cat-d-settle) var(--cat-ease-settle) both;
}
@keyframes cat-step-unfurl {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes cat-step-settle {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(18px); }
}

[data-design="b"] .rf-step__label {
  font-family: var(--cat-font-mono); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--cat-orange); padding: 0;
}
[data-design="b"] .rf-step__q {
  font-family: var(--cat-font-display); font-size: clamp(20px, 3vw, 26px);
  color: var(--cat-ink); margin: var(--cat-s-stud) 0 var(--cat-s-beam);
  font-weight: 500; letter-spacing: -0.01em; line-height: 1.2;
}

/* Options */
[data-design="b"] .rf-options {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--cat-s-stud);
  margin-bottom: var(--cat-s-beam);
}
[data-design="b"] .rf-options--col { grid-template-columns: 1fr; }
[data-design="b"] .rf-options label {
  display: flex; align-items: center; gap: var(--cat-s-stud);
  padding: var(--cat-s-stud) var(--cat-s-joist);
  border: 1px solid var(--cat-hairline); border-radius: var(--cat-r-edge);
  font-size: 15px; cursor: pointer; color: var(--cat-ink);
  transition:
    border-color var(--cat-d-quick) var(--cat-ease-register),
    background-color var(--cat-d-quick) linear;
  min-height: 44px;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-options label:hover { border-color: var(--cat-orange); }
}
[data-design="b"] .rf-options input[type="radio"] { accent-color: var(--cat-orange); }
[data-design="b"] .rf-options label:has(input:checked) {
  border-color: var(--cat-orange);
  background: color-mix(in oklab, var(--cat-orange), transparent 92%);
}

/* Members (inputs) */
[data-design="b"] .rf-members {
  display: grid; gap: var(--cat-s-joist); margin-bottom: var(--cat-s-beam);
}
[data-design="b"] .rf-member {
  display: flex; flex-direction: column; gap: 6px;
}
[data-design="b"] .rf-member span {
  font-family: var(--cat-font-mono); text-transform: uppercase;
  letter-spacing: 0.08em; font-size: 11px; color: var(--cat-stone);
}
[data-design="b"] .rf-member input {
  padding: 12px 14px; background: transparent; color: var(--cat-ink);
  font-family: var(--cat-font-body); font-size: 16px;
  border: 1px solid var(--cat-hairline); border-radius: var(--cat-r-edge);
  outline: none;
  transition:
    border-color var(--cat-d-quick) var(--cat-ease-register),
    box-shadow var(--cat-d-quick) linear;
  min-height: 44px;
}
[data-design="b"] .rf-member input:focus-visible {
  border-color: var(--cat-orange);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--cat-orange), transparent 70%);
}

/* Tensors (buttons) */
[data-design="b"] .rf-step__nav {
  display: flex; justify-content: space-between; gap: var(--cat-s-stud);
  margin-top: var(--cat-s-beam);
}
[data-design="b"] .rf-step__nav:has(.rf-tensor:only-child) { justify-content: flex-end; }
[data-design="b"] .rf-tensor {
  font-family: var(--cat-font-mono); text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 12px; padding: 12px 18px; border-radius: var(--cat-r-edge);
  cursor: pointer; border: 1px solid var(--cat-hairline);
  background: transparent; color: var(--cat-ink);
  min-height: 44px; min-width: 44px;
  transition:
    background-color var(--cat-d-quick) var(--cat-ease-register),
    border-color var(--cat-d-quick) var(--cat-ease-register),
    color var(--cat-d-quick) var(--cat-ease-register),
    box-shadow var(--cat-d-quick) var(--cat-ease-register),
    transform var(--cat-d-quick) var(--cat-ease-register);
}
[data-design="b"] .rf-tensor--primary {
  background: var(--cat-orange); color: var(--cat-bg); border-color: var(--cat-orange);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-tensor--primary:hover { background: color-mix(in oklab, var(--cat-orange), black 8%); }
  [data-design="b"] .rf-tensor--secondary:hover { border-color: var(--cat-orange); color: var(--cat-orange); }
}
[data-design="b"] .rf-tensor:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--cat-orange), transparent 70%);
}
[data-design="b"] .rf-tensor:active { transform: translateY(1px); }

/* Funnel trust footer */
[data-design="b"] .rf-funnel__trust {
  max-width: 880px; margin-inline: auto; padding-inline: clamp(16px, 4vw, 36px);
  display: flex; flex-wrap: wrap; gap: var(--cat-s-beam);
  margin-top: var(--cat-s-span);
  font-family: var(--cat-font-mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.08em; color: var(--cat-stone);
}
[data-design="b"] .rf-funnel__trust span { white-space: nowrap; }
[data-design="b"] .rf-funnel__contact {
  margin-top: var(--cat-s-beam); color: var(--cat-graphite); font-size: 15px;
}
[data-design="b"] .rf-funnel__contact a {
  color: var(--cat-orange); text-decoration: none;
}

/* Summary (confirmation panel) */
[data-design="b"] .rf-summary {
  margin: var(--cat-s-beam) 0 0;
  display: grid; grid-template-columns: max-content 1fr; gap: var(--cat-s-stud) var(--cat-s-beam);
  border-top: 1px solid var(--cat-hairline); padding-top: var(--cat-s-beam);
}
[data-design="b"] .rf-summary dt {
  font-family: var(--cat-font-mono); text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 11px; color: var(--cat-stone);
}
[data-design="b"] .rf-summary dd {
  font-family: var(--cat-font-mono); font-size: 14px; color: var(--cat-ink); margin: 0;
}

/* ════════════════════════════════════════════════════════════
   SHARED SECTION UTILITIES
   ════════════════════════════════════════════════════════════ */

[data-design="b"] .rf-eyebrow {
  font-family: var(--cat-font-mono); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--cat-orange); margin: 0 0 var(--cat-s-stud);
}
[data-design="b"] .rf-section-h {
  font-family: var(--cat-font-display); font-size: clamp(28px, 5vw, 48px);
  font-weight: 500; letter-spacing: -0.02em; line-height: 1.05;
  color: var(--cat-ink); margin: 0 0 var(--cat-s-span); max-width: 24ch;
}

/* ════════════════════════════════════════════════════════════
   E3 AMBIENT A — ROOF SYSTEMS (isobars)
   TRIAD-2: scroll-driven parallax on hero→content handoff
   ════════════════════════════════════════════════════════════ */

[data-design="b"] .rf-ambient-a {
  position: relative; isolation: isolate;
  padding-block: var(--cat-s-frame);
  background: var(--cat-bg);
  overflow: hidden;
  /* TRIAD-2: scroll-linked parallax handled via JS IntersectionObserver + translateY */
}
[data-design="b"] .rf-ambient-a__motion {
  position: absolute; inset: 0; z-index: 0; opacity: 0.35;
  pointer-events: none;
  will-change: transform;
}
[data-design="b"] .rf-ambient-a__motion svg { width: 100%; height: 100%; display: block; }
[data-design="b"] .rf-isobar {
  fill: none; stroke: var(--cat-cyan); stroke-width: .9;
  vector-effect: non-scaling-stroke;
  stroke-dasharray: 4 6;
  animation: cat-isobar-flow 16s linear infinite;
  animation-delay: calc(var(--i, 0) * -2s);
  animation-play-state: paused;
}
[data-design="b"] .rf-ambient-a.is-live .rf-isobar { animation-play-state: running; }

@keyframes cat-isobar-flow {
  0%   { stroke-dashoffset: 0;   transform: translateX(0); }
  50%  { stroke-dashoffset: -40; transform: translateX(-12px); }
  100% { stroke-dashoffset: -80; transform: translateX(0); }
}

[data-design="b"] .rf-ambient-a__content {
  position: relative; z-index: 1;
  max-width: 1200px; margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}

/* Methods rows */
[data-design="b"] .rf-methods { display: flex; flex-direction: column; }
[data-design="b"] .rf-method {
  display: grid; grid-template-columns: 80px 1fr; gap: var(--cat-s-beam);
  padding: var(--cat-s-beam) 0; border-top: 1px solid var(--cat-hairline);
  transition: border-color var(--cat-d-base) var(--cat-ease-register);
}
[data-design="b"] .rf-method:last-child { border-bottom: 1px solid var(--cat-hairline); }
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-method:hover { border-top-color: var(--cat-orange); }
}
[data-design="b"] .rf-method__num {
  font-family: var(--cat-font-mono); color: var(--cat-orange);
  font-size: 26px; letter-spacing: 0.04em;
}
[data-design="b"] .rf-method h3 {
  font-family: var(--cat-font-display); font-size: clamp(18px, 2.5vw, 24px);
  font-weight: 500; margin: 0 0 var(--cat-s-stud); color: var(--cat-ink);
  letter-spacing: -0.01em;
}
[data-design="b"] .rf-method p {
  margin: 0; color: var(--cat-graphite); max-width: 60ch; line-height: 1.55;
  font-size: clamp(15px, 1.5vw, 17px);
}

/* Repeat CTA block */
[data-design="b"] .rf-repeat-cta {
  background: var(--cat-surface);
  border-block: 1px solid var(--cat-mist);
  padding-block: var(--cat-s-frame);
  text-align: center;
}
[data-design="b"] .rf-repeat-cta__copy {
  font-family: var(--cat-font-body); font-size: clamp(16px, 2vw, 20px);
  color: var(--cat-graphite); max-width: 52ch; margin: 0 auto var(--cat-s-span);
  line-height: 1.6;
}

/* ════════════════════════════════════════════════════════════
   E4 AMBIENT B — PROCESS / ABOUT (soap-film membrane)
   ════════════════════════════════════════════════════════════ */

[data-design="b"] .rf-ambient-b {
  position: relative; isolation: isolate; overflow: hidden;
  padding-block: var(--cat-s-frame);
  background: var(--cat-surface);
  border-block: 1px solid var(--cat-mist);
}
[data-design="b"] .rf-ambient-b__content {
  position: relative; z-index: 1;
  max-width: 1200px; margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="b"] .rf-studio {
  display: grid; grid-template-columns: 1.6fr 1fr; gap: var(--cat-s-span); align-items: start;
}
[data-design="b"] .rf-studio__copy {
  font-family: var(--cat-font-body); font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.65; color: var(--cat-graphite); max-width: 60ch;
}
[data-design="b"] .rf-studio__copy p { margin: 0 0 var(--cat-s-beam); }

/* Process steps track */
[data-design="b"] .rf-process-steps {
  display: flex; flex-wrap: wrap; gap: var(--cat-s-stud);
  margin-top: var(--cat-s-span);
}
[data-design="b"] .rf-ps {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: var(--cat-s-stud) var(--cat-s-joist);
  border: 1px solid var(--cat-hairline); border-radius: var(--cat-r-edge);
  min-width: 72px;
}
[data-design="b"] .rf-ps__n {
  font-family: var(--cat-font-mono); color: var(--cat-orange);
  font-size: 18px; letter-spacing: 0.04em;
}
[data-design="b"] .rf-ps__l {
  font-family: var(--cat-font-mono); font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.1em; color: var(--cat-stone);
}

/* Data list */
[data-design="b"] .rf-data-list {
  display: flex; flex-direction: column; border-top: 1px solid var(--cat-hairline);
  margin: 0;
}
[data-design="b"] .rf-data-list > div {
  display: grid; grid-template-columns: 1fr auto; padding: var(--cat-s-stud) 0;
  border-bottom: 1px solid var(--cat-mist);
}
[data-design="b"] .rf-data-list dt {
  font-family: var(--cat-font-mono); text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 11px; color: var(--cat-stone);
}
[data-design="b"] .rf-data-list dd {
  font-family: var(--cat-font-mono); font-size: 14px; color: var(--cat-ink);
  margin: 0; font-variant-numeric: tabular-nums;
}

/* Membrane motion layer */
[data-design="b"] .rf-ambient-b__motion {
  position: absolute; inset: 0; z-index: 0; opacity: 0.18; pointer-events: none;
}
[data-design="b"] .rf-ambient-b__motion svg { width: 100%; height: 100%; display: block; }
[data-design="b"] .rf-mb {
  fill: none; stroke: var(--cat-ink); stroke-width: .75; vector-effect: non-scaling-stroke;
}
[data-design="b"] .rf-mb__node { fill: var(--cat-ink); }
[data-design="b"] .rf-mb__node--accent { fill: var(--cat-orange); }
[data-design="b"] .rf-ambient-b.is-live .rf-membrane {
  animation: cat-membrane-breathe 20s var(--cat-ease-settle) infinite alternate;
  transform-origin: center;
}

@keyframes cat-membrane-breathe {
  0%   { transform: translateY(0) scale(1); }
  33%  { transform: translateY(-6px) scale(1.008); }
  66%  { transform: translateY(3px) scale(0.996); }
  100% { transform: translateY(-2px) scale(1.004); }
}

/* ════════════════════════════════════════════════════════════
   ABOUT SECTION
   ════════════════════════════════════════════════════════════ */

[data-design="b"] .rf-about {
  padding-block: var(--cat-s-frame);
  background: var(--cat-bg);
  border-top: 1px solid var(--cat-mist);
}
[data-design="b"] .rf-about__inner {
  max-width: 1200px; margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="b"] .rf-about__copy {
  max-width: 60ch; color: var(--cat-graphite);
  font-size: clamp(15px, 1.5vw, 18px); line-height: 1.65;
}
[data-design="b"] .rf-about__copy p { margin: 0 0 var(--cat-s-beam); }

/* ════════════════════════════════════════════════════════════
   FOOTER — drafting title block
   ════════════════════════════════════════════════════════════ */

[data-design="b"] .rf-footer {
  background: var(--cat-bg);
  border-top: 2px solid var(--cat-hairline);
  padding-block: var(--cat-s-span) var(--cat-s-frame);
}
[data-design="b"] .rf-footer__beam {
  height: 3px; background: color-mix(in oklab, var(--cat-orange), transparent 60%);
  margin-bottom: var(--cat-s-span);
}
[data-design="b"] .rf-footer__inner {
  max-width: 1200px; margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--cat-s-span);
}
[data-design="b"] .rf-footer__brand {
  font-family: var(--cat-font-display); font-size: 20px; font-weight: 600;
  color: var(--cat-ink); margin: 0 0 var(--cat-s-stud);
}
[data-design="b"] .rf-footer__tagline {
  font-family: var(--cat-font-mono); font-size: 13px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--cat-orange); margin: 0 0 var(--cat-s-stud);
}
[data-design="b"] .rf-footer__license {
  font-family: var(--cat-font-mono); font-size: 11px; letter-spacing: 0.08em;
  color: var(--cat-stone); margin: 0;
}
[data-design="b"] .rf-footer__label {
  font-family: var(--cat-font-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--cat-stone); margin: 0 0 var(--cat-s-stud);
}
[data-design="b"] .rf-footer__tel {
  display: block; font-family: var(--cat-font-display); font-size: 22px;
  color: var(--cat-ink); text-decoration: none; font-weight: 600;
  margin-bottom: var(--cat-s-stud);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-footer__tel:hover { color: var(--cat-orange); }
}
[data-design="b"] .rf-footer__area {
  font-family: var(--cat-font-mono); font-size: 13px; color: var(--cat-graphite); margin: 0;
}
[data-design="b"] .rf-footer__copy {
  font-family: var(--cat-font-mono); font-size: 11px; color: var(--cat-stone);
  margin-top: var(--cat-s-span);
}

/* ════════════════════════════════════════════════════════════
   SCROLL-PARALLAX (TRIAD-2) — parallax on ambient-a motion layer
   Implemented via scroll event in JS; class .has-scroll-parallax
   ════════════════════════════════════════════════════════════ */

/* ════════════════════════════════════════════════════════════
   RESPONSIVE — mobile / tablet guards
   Scoped: NEVER bare [data-design] without .dq-design ancestor
   ════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
  [data-design="b"] .rf-studio { grid-template-columns: 1fr; gap: var(--cat-s-beam); }
  [data-design="b"] .rf-footer__inner { grid-template-columns: 1fr; gap: var(--cat-s-span); }
  [data-design="b"] .rf-method { grid-template-columns: 1fr; gap: var(--cat-s-stud); }
  [data-design="b"] .rf-method__num { font-size: 20px; }
  [data-design="b"] .rf-drawer { inset: 56px 0 0 0; }
}

@media (max-width: 560px) {
  [data-design="b"] .rf-options { grid-template-columns: 1fr; }
  [data-design="b"] .rf-funnel { padding: var(--cat-s-beam); min-height: 320px; }
  [data-design="b"] .rf-beam__ticks { font-size: 8px; }
  [data-design="b"] .rf-header__bar { padding-block: 10px; }
  [data-design="b"] .rf-logo__mark { font-size: 15px; }
  [data-design="b"] .rf-process-steps { gap: var(--cat-s-rivet); }
  [data-design="b"] .rf-ps { min-width: 60px; padding: var(--cat-s-rivet) var(--cat-s-stud); }
}

/* Max-width container guard (ultrawide) */
@media (min-width: 1440px) {
  [data-design="b"] .rf-hero__content {
    padding-inline: clamp(60px, 8vw, 120px);
  }
}

/* ════════════════════════════════════════════════════════════
   REDUCED-MOTION FALLBACKS
   ════════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-chain__curve { animation: none; }
  [data-design="b"] .rf-burger span { transition: none; }
  [data-design="b"] .rf-cta { animation: none; }
  [data-design="b"] .rf-cta__cable-line,
  [data-design="b"] .rf-cta__cable-head { transition: none; }
  [data-design="b"] .rf-ridge { animation: none; stroke-dashoffset: 0; opacity: 0.65; }
  [data-design="b"] .rf-rake { animation: none; opacity: 0.4; }
  [data-design="b"] .rf-eave { animation: none; stroke-dashoffset: 0; }
  [data-design="b"] .rf-course { animation: none; opacity: 0.1; transform: scaleX(1); }
  [data-design="b"] .rf-arc { animation: none; opacity: 0.22; }
  [data-design="b"] .rf-reg line { animation: none; opacity: 0.9; }
  [data-design="b"] .rf-isobar { animation: none; }
  [data-design="b"] .rf-ambient-b.is-live .rf-membrane { animation: none; }
  [data-design="b"] .rf-step,
  [data-design="b"] .rf-step.is-leaving { animation: none; }
  [data-design="b"] .rf-beam__fill { transition: none; }
  [data-design="b"] .b-pointer__rule { animation: none; opacity: 0.7; }
  [data-design="b"] .b-pointer__label { animation: none; opacity: 0.72; }
}

/* 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; }