/* ═══════════════════════════════════════════════════════════════════
   Portland Metro Electric — Design A (Catenary)
   All rules scoped under .dq-design[data-design="a"] or
   [data-design="a"] .dq-design / child selectors.
   ZERO bare element rules. ZERO [data-design="a"] left.
   ═══════════════════════════════════════════════════════════════════ */

/* ── Design token reset ── */
[data-design="a"] {
  --design-a-primary: #E9601F;

  /* color tokens */
  --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 (structural primitives) */
  --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;

  /* elevation */
  --cat-elev-flat: none;
  --cat-elev-ring: inset 0 0 0 1px var(--cat-hairline);
  --cat-elev-lift: 0 1px 0 0 var(--cat-hairline),
                   0 0 0 1px color-mix(in oklab, var(--cat-hairline), transparent 50%);

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

[data-design="a"] *, [data-design="a"] *::before, [data-design="a"] *::after {
  box-sizing: inherit;
}

/* ── E1: HEADER ── */
[data-design="a"] .rf-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--cat-bg);
  border-bottom: 1px solid var(--cat-mist);
}

[data-design="a"] .rf-chain {
  position: absolute; inset: 0 0 auto 0; height: 100%;
  pointer-events: none; overflow: hidden;
}
[data-design="a"] .rf-chain svg {
  width: 100%; height: 100%; display: block;
}
[data-design="a"] .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="a"] .rf-chain__curve--2 {
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 35%);
  animation-duration: 22s; animation-delay: -6s;
}
[data-design="a"] .rf-chain__curve--3 {
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 60%);
  animation-duration: 31s; animation-delay: -12s;
}
[data-design="a"] .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="a"] .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="a"] .rf-logo {
  text-decoration: none; color: var(--cat-ink);
}
[data-design="a"] .rf-logo__mark {
  font-family: var(--cat-font-display);
  font-size: 18px; font-weight: 600; letter-spacing: -0.01em;
  display: block;
}
[data-design="a"] .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);
  flex-shrink: 0;
}
[data-design="a"] .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;
}
[data-design="a"] .rf-burger:hover { border-color: var(--cat-orange); }
[data-design="a"] .rf-burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
[data-design="a"] .rf-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
[data-design="a"] .rf-burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Drawer */
[data-design="a"] .rf-drawer {
  position: fixed; inset: 64px 0 0 0;
  background: var(--cat-bg);
  border-top: 1px solid var(--cat-hairline);
  z-index: 39; overflow-y: auto;
}
[data-design="a"] .rf-drawer[hidden] { display: none; }
[data-design="a"] .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="a"] .rf-drawer__inner a {
  font-family: var(--cat-font-mono); text-transform: uppercase; letter-spacing: 0.08em;
  font-size: clamp(22px, 4.4vw, 32px); 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; min-height: 44px;
}
[data-design="a"] .rf-drawer__inner a::before {
  content: attr(data-num); color: var(--cat-orange); font-size: .72em;
}
[data-design="a"] .rf-drawer__phone {
  color: var(--cat-orange) !important;
}

/* ── HERO ── */
[data-design="a"] .rf-hero {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: clamp(480px, 75vh, 720px);
  display: flex; align-items: center;
  background: var(--cat-bg);
  padding-block: clamp(80px, 10vw, 140px);
}

/* E3: hero backdrop — ONE animated layer, perceptible sustained ambient */
[data-design="a"] .rf-hero__backdrop {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
}
[data-design="a"] .rf-hero__grid {
  width: 100%; height: 100%; display: block;
}

/* Schematic grid rails */
[data-design="a"] .rf-hg__rail {
  stroke: var(--cat-mist); stroke-width: .5;
  vector-effect: non-scaling-stroke; opacity: 0.7;
}

/* Circuit voltage traces — main animated substrate */
[data-design="a"] .rf-hg__trace {
  fill: none; stroke: var(--cat-cyan); stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
  stroke-dasharray: 8 120;
  stroke-dashoffset: 0;
  opacity: 0.45;
  animation: cat-trace-travel 7s linear infinite;
}
[data-design="a"] .rf-hg__trace--2 {
  stroke-dasharray: 6 180;
  opacity: 0.3;
  animation-duration: 11s;
  animation-delay: var(--delay, -3s);
}

@keyframes cat-trace-travel {
  0%   { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -400; }
}

/* Node dots */
[data-design="a"] .rf-hg__node {
  fill: var(--cat-cyan); opacity: 0.5;
  animation: cat-node-pulse 5s var(--cat-ease-settle) infinite alternate;
}
[data-design="a"] .rf-hg__node--accent {
  fill: var(--cat-orange); opacity: 0.6;
  animation-duration: 6s; animation-delay: -2s;
}

@keyframes cat-node-pulse {
  0%   { opacity: 0.25; r: 3; }
  50%  { opacity: 0.65; r: 5; }
  100% { opacity: 0.3;  r: 3; }
}

/* Phasor arcs */
[data-design="a"] .rf-hg__phasor {
  fill: none; stroke: var(--cat-cyan); stroke-width: 1;
  vector-effect: non-scaling-stroke; opacity: 0;
  stroke-dasharray: 200; stroke-dashoffset: 200;
  animation: cat-phasor-sweep 6s var(--cat-ease-unfurl) infinite;
}
[data-design="a"] .rf-hg__phasor--2 {
  opacity: 0;
  animation-duration: 8s;
  animation-delay: var(--ph-delay, -2.5s);
}

@keyframes cat-phasor-sweep {
  0%   { stroke-dashoffset: 200; opacity: 0; }
  20%  { opacity: 0.35; }
  60%  { stroke-dashoffset: 0; opacity: 0.35; }
  85%  { opacity: 0.2; }
  100% { stroke-dashoffset: -10; opacity: 0; }
}

[data-design="a"] .rf-hero__content {
  position: relative; z-index: 1;
  max-width: 1200px; margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
  max-width: min(860px, 100%);
}

/* Hero text — opacity:1 at FIRST PAINT, never opacity:0 */
[data-design="a"] .rf-hero__headline {
  font-family: var(--cat-font-display);
  font-size: clamp(32px, 5.5vw, 64px);
  font-weight: 600; letter-spacing: -0.02em; line-height: 1.08;
  color: var(--cat-ink); margin: 0 0 var(--cat-s-beam);
  max-width: 18ch;
  opacity: 1; /* explicit: never 0 */
}
[data-design="a"] .rf-hero__subtitle {
  font-family: var(--cat-font-body); font-size: clamp(16px, 2vw, 20px);
  color: var(--cat-graphite); margin: 0 0 var(--cat-s-stud);
  line-height: 1.5; opacity: 1;
}
[data-design="a"] .rf-hero__proof {
  font-family: var(--cat-font-mono); font-size: 13px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--cat-stone);
  margin: 0 0 var(--cat-s-span); opacity: 1;
}

/* E2: phone CTA — primary electrical affordance */
[data-design="a"] .rf-cta {
  display: inline-flex; align-items: center; gap: var(--cat-s-stud);
  padding: 16px 26px; min-height: 52px;
  background: var(--cat-orange); color: var(--cat-bg);
  font-family: var(--cat-font-mono); text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 15px; font-weight: 500; text-decoration: none;
  border: none; border-radius: var(--cat-r-edge); cursor: pointer;
  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;
}
[data-design="a"] .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;
}
[data-design="a"] .rf-cta:hover,
[data-design="a"] .rf-cta:focus-visible {
  background: color-mix(in oklab, var(--cat-orange), black 8%);
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--cat-orange), transparent 70%);
}
[data-design="a"] .rf-cta:active { transform: translateY(1px); }
[data-design="a"] .rf-cta:active::after { opacity: 1; }

[data-design="a"] .rf-cta--inline {
  font-size: 13px; padding: 12px 20px; min-height: 44px;
  animation: none;
  margin-top: var(--cat-s-beam);
  display: inline-flex;
}

[data-design="a"] .rf-cta__cable {
  width: 40px; height: 16px; overflow: visible; flex-shrink: 0;
}
[data-design="a"] .rf-cta__cable-line,
[data-design="a"] .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);
}
[data-design="a"] .rf-cta:hover .rf-cta__cable-line,
[data-design="a"] .rf-cta:focus-visible .rf-cta__cable-line {
  transform: translateY(-1px);
}

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

[data-design="a"] .rf-hero__trust {
  font-family: var(--cat-font-mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--cat-stone);
  margin: var(--cat-s-beam) 0 0; opacity: 1;
}

/* ── E6: POINTER — dimension-line wayfinding ── */
[data-design="a"] .cat-pointer {
  display: flex; justify-content: center;
  padding: clamp(40px, 8vw, 80px) 16px clamp(56px, 10vw, 96px);
  color: var(--cat-graphite);
}
[data-design="a"] .cat-pointer__hit {
  position: relative; display: inline-flex; flex-direction: column;
  align-items: center; gap: 8px;
  text-decoration: none; color: currentColor;
}
[data-design="a"] .cat-pointer__tick {
  display: block; width: 16px; height: 1px;
  background: currentColor; opacity: 0.7;
}
[data-design="a"] .cat-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="a"] .cat-pointer__label {
  font-family: var(--cat-font-mono); font-size: 11px;
  letter-spacing: 0.2em; text-transform: uppercase;
  opacity: 0;
  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%, 30%, 100% { opacity: 0; }
  50%, 70%      { opacity: 0.85; }
}

/* ── E5: FUNNEL ── */
[data-design="a"] .rf-interactive {
  background: var(--cat-bg); padding-block: var(--cat-s-frame);
  border-top: 1px solid var(--cat-hairline);
}
[data-design="a"] .rf-funnel__head,
[data-design="a"] .rf-funnel,
[data-design="a"] .rf-funnel__beam {
  max-width: 880px; margin-inline: auto; padding-inline: clamp(16px, 4vw, 36px);
}

[data-design="a"] .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="a"] .rf-section-h {
  font-family: var(--cat-font-display);
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 500; letter-spacing: -0.02em; line-height: 1.08;
  color: var(--cat-ink); margin: 0 0 var(--cat-s-span); max-width: 22ch;
}
[data-design="a"] .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="a"] .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="a"] .rf-beam__fill {
  position: absolute; inset: 0 auto 0 0; width: 0%;
  background: var(--cat-orange);
  transition: width var(--cat-d-settle) var(--cat-ease-settle);
  border-radius: var(--cat-r-edge);
}
[data-design="a"] .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="a"] .rf-beam__ticks li {
  position: relative; padding-top: 8px; padding-left: 4px;
  border-top: 1px solid var(--cat-hairline);
}
[data-design="a"] .rf-beam__ticks li span { color: var(--cat-orange); margin-right: 4px; }

/* Form / steps */
[data-design="a"] .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="a"] .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="a"] .rf-step.is-active { display: block; }
[data-design="a"] .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="a"] .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;
  display: block; margin-bottom: var(--cat-s-stud);
}
[data-design="a"] .rf-step__q {
  font-family: var(--cat-font-display); font-size: clamp(20px, 3vw, 26px);
  color: var(--cat-ink); margin: 0 0 var(--cat-s-beam);
  font-weight: 500; letter-spacing: -0.01em; line-height: 1.2;
}
[data-design="a"] .rf-step__hint {
  font-family: var(--cat-font-body); font-size: 14px; color: var(--cat-stone);
  margin: 0 0 var(--cat-s-beam); line-height: 1.5; max-width: 58ch;
}

/* Option chips */
[data-design="a"] .rf-options {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--cat-s-stud);
  margin-bottom: var(--cat-s-beam);
}
[data-design="a"] .rf-options--col { grid-template-columns: 1fr; }
[data-design="a"] .rf-options label {
  display: flex; align-items: center; gap: var(--cat-s-stud);
  padding: var(--cat-s-stud) var(--cat-s-joist); min-height: 44px;
  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;
  line-height: 1.4;
}
[data-design="a"] .rf-options label:hover { border-color: var(--cat-orange); }
[data-design="a"] .rf-options input[type="radio"] { accent-color: var(--cat-orange); flex-shrink: 0; }
[data-design="a"] .rf-options label:has(input:checked) {
  border-color: var(--cat-orange);
  background: color-mix(in oklab, var(--cat-orange), transparent 92%);
}

/* Emergency note */
[data-design="a"] .rf-emergency-note {
  border: 1px solid var(--cat-orange); border-radius: var(--cat-r-edge);
  padding: var(--cat-s-stud) var(--cat-s-beam); margin-bottom: var(--cat-s-beam);
  background: color-mix(in oklab, var(--cat-orange), transparent 92%);
  font-size: 15px; color: var(--cat-ink); line-height: 1.5;
}
[data-design="a"] .rf-emergency-note[hidden] { display: none; }

/* Member (form field) */
[data-design="a"] .rf-members { display: grid; gap: var(--cat-s-joist); margin-bottom: var(--cat-s-beam); }
[data-design="a"] .rf-member { display: flex; flex-direction: column; gap: 6px; }
[data-design="a"] .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="a"] .rf-member input,
[data-design="a"] .rf-member textarea {
  padding: 12px 14px; background: transparent; color: var(--cat-ink);
  font-family: var(--cat-font-body); font-size: 16px; line-height: 1.5;
  border: 1px solid var(--cat-hairline); border-radius: var(--cat-r-edge);
  outline: none; resize: vertical;
  transition: border-color var(--cat-d-quick) var(--cat-ease-register),
              box-shadow var(--cat-d-quick) linear;
}
[data-design="a"] .rf-member input:focus-visible,
[data-design="a"] .rf-member textarea:focus-visible {
  border-color: var(--cat-orange);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--cat-orange), transparent 70%);
}

/* Step navigation */
[data-design="a"] .rf-step__nav {
  display: flex; justify-content: space-between; gap: var(--cat-s-stud);
  margin-top: var(--cat-s-beam); flex-wrap: wrap;
}
[data-design="a"] .rf-step__nav:has(.rf-tensor:only-child) { justify-content: flex-end; }

/* Tensors (buttons) */
[data-design="a"] .rf-tensor {
  font-family: var(--cat-font-mono); text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 12px; padding: 12px 18px; min-height: 44px; min-width: 44px;
  border-radius: var(--cat-r-edge); cursor: pointer;
  border: 1px solid var(--cat-hairline); background: transparent; color: var(--cat-ink);
  transition: all var(--cat-d-quick) var(--cat-ease-register);
}
[data-design="a"] .rf-tensor--primary {
  background: var(--cat-orange); color: var(--cat-bg); border-color: var(--cat-orange);
}
[data-design="a"] .rf-tensor--primary:hover {
  background: color-mix(in oklab, var(--cat-orange), black 8%);
}
[data-design="a"] .rf-tensor--secondary:hover {
  border-color: var(--cat-orange); color: var(--cat-orange);
}
[data-design="a"] .rf-tensor:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--cat-orange), transparent 70%);
}
[data-design="a"] .rf-tensor:active { transform: translateY(1px); }

/* Summary (done state) */
[data-design="a"] .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="a"] .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="a"] .rf-summary dd {
  font-family: var(--cat-font-mono); font-size: 14px; color: var(--cat-ink);
  margin: 0;
}

/* ── E3: AMBIENT A (services isobars) ── */
[data-design="a"] .rf-ambient-a {
  position: relative; isolation: isolate;
  padding-block: var(--cat-s-frame); background: var(--cat-bg); overflow: hidden;
}
[data-design="a"] .rf-ambient-a__motion {
  position: absolute; inset: 0; z-index: 0; opacity: 0.35; pointer-events: none;
}
[data-design="a"] .rf-ambient-a__motion svg { width: 100%; height: 100%; display: block; }
[data-design="a"] .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="a"] .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="a"] .rf-ambient-a__content {
  position: relative; z-index: 1;
  max-width: 1200px; margin-inline: auto; padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="a"] .rf-methods { display: flex; flex-direction: column; }
[data-design="a"] .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);
  align-items: start;
}
[data-design="a"] .rf-method:last-child { border-bottom: 1px solid var(--cat-hairline); }
[data-design="a"] .rf-method:hover { border-top-color: var(--cat-orange); }
[data-design="a"] .rf-method__num {
  font-family: var(--cat-font-mono); color: var(--cat-orange);
  font-size: 26px; letter-spacing: 0.04em;
}
[data-design="a"] .rf-method h3 {
  font-family: var(--cat-font-display); font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 500; margin: 0 0 var(--cat-s-stud); color: var(--cat-ink);
  letter-spacing: -0.01em;
}
[data-design="a"] .rf-method p {
  margin: 0; color: var(--cat-graphite); max-width: 60ch; line-height: 1.5; font-size: 16px;
}

/* ── E4: AMBIENT B (about / process membrane) ── */
[data-design="a"] .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="a"] .rf-ambient-b__content {
  position: relative; z-index: 1;
  max-width: 1200px; margin-inline: auto; padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="a"] .rf-studio {
  display: grid; grid-template-columns: 1.6fr 1fr; gap: var(--cat-s-span); align-items: start;
}
[data-design="a"] .rf-studio__copy {
  font-family: var(--cat-font-body); font-size: 18px; line-height: 1.6; color: var(--cat-graphite);
}

/* Process list */
[data-design="a"] .rf-process {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: var(--cat-s-beam);
}
[data-design="a"] .rf-process li {
  display: grid; grid-template-columns: 56px 1fr; gap: var(--cat-s-beam);
  align-items: start; padding-bottom: var(--cat-s-beam);
  border-bottom: 1px solid var(--cat-mist);
}
[data-design="a"] .rf-process__num {
  font-family: var(--cat-font-mono); color: var(--cat-orange); font-size: 22px;
  letter-spacing: 0.04em; flex-shrink: 0;
}
[data-design="a"] .rf-process strong {
  display: block; font-family: var(--cat-font-display); font-weight: 600;
  font-size: 18px; color: var(--cat-ink); margin-bottom: 4px; line-height: 1.3;
}
[data-design="a"] .rf-process p {
  margin: 0; font-size: 16px; line-height: 1.55; color: var(--cat-graphite); max-width: 52ch;
}

[data-design="a"] .rf-data-list {
  display: flex; flex-direction: column; border-top: 1px solid var(--cat-hairline); margin: 0;
}
[data-design="a"] .rf-data-list > div {
  display: grid; grid-template-columns: 1fr auto;
  padding: var(--cat-s-stud) 0; border-bottom: 1px solid var(--cat-mist);
  align-items: baseline;
}
[data-design="a"] .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="a"] .rf-data-list dd {
  font-family: var(--cat-font-mono); font-size: 15px; color: var(--cat-ink); margin: 0;
  font-variant-numeric: tabular-nums;
}

[data-design="a"] .rf-ambient-b__motion {
  position: absolute; inset: 0; z-index: 0; opacity: 0.18; pointer-events: none;
}
[data-design="a"] .rf-ambient-b__motion svg { width: 100%; height: 100%; display: block; }
[data-design="a"] .rf-mb {
  fill: none; stroke: var(--cat-ink); stroke-width: .75; vector-effect: non-scaling-stroke;
}
[data-design="a"] .rf-mb__node { fill: var(--cat-ink); }
[data-design="a"] .rf-mb__node--accent { fill: var(--cat-orange); }
[data-design="a"] .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); }
}

/* ── SERVICE AREA ── */
[data-design="a"] .rf-service-area {
  padding-block: var(--cat-s-frame); background: var(--cat-bg);
  border-top: 1px solid var(--cat-mist);
}
[data-design="a"] .rf-service-area__content {
  max-width: 1200px; margin-inline: auto; padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="a"] .rf-area__intro {
  font-size: 17px; color: var(--cat-graphite); margin: 0 0 var(--cat-s-beam);
}
[data-design="a"] .rf-area__list {
  list-style: none; margin: 0 0 var(--cat-s-span); padding: 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--cat-s-stud) var(--cat-s-beam);
}
[data-design="a"] .rf-area__list li {
  font-family: var(--cat-font-mono); font-size: 13px; letter-spacing: 0.06em;
  color: var(--cat-graphite); padding: var(--cat-s-stud) 0;
  border-bottom: 1px solid var(--cat-mist);
}

/* ── FOOTER (drafting title block) ── */
[data-design="a"] .rf-footer {
  background: var(--cat-ink); color: var(--cat-bg);
  padding-block: var(--cat-s-frame);
}
[data-design="a"] .rf-footer__beam {
  height: 4px; background: var(--cat-orange); margin-bottom: var(--cat-s-span);
}
[data-design="a"] .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); align-items: start;
}
[data-design="a"] .rf-footer .rf-logo__mark { color: var(--cat-bg); font-size: 17px; }
[data-design="a"] .rf-footer__tag {
  font-family: var(--cat-font-mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: color-mix(in oklab, var(--cat-bg), transparent 40%);
  margin: var(--cat-s-stud) 0 0;
}
[data-design="a"] .rf-footer__label {
  font-family: var(--cat-font-mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--cat-orange); margin: 0 0 var(--cat-s-beam);
}
[data-design="a"] .rf-footer__phone {
  display: block; font-family: var(--cat-font-display); font-size: 22px;
  font-weight: 600; color: var(--cat-bg); text-decoration: none; margin-bottom: var(--cat-s-stud);
}
[data-design="a"] .rf-footer__phone:hover { color: var(--cat-orange); }
[data-design="a"] .rf-footer__mono {
  font-family: var(--cat-font-mono); font-size: 13px; letter-spacing: 0.04em;
  color: color-mix(in oklab, var(--cat-bg), transparent 35%); margin: 4px 0;
}
[data-design="a"] .rf-footer__links {
  list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px;
}
[data-design="a"] .rf-footer__links a {
  font-family: var(--cat-font-mono); font-size: 13px; letter-spacing: 0.06em;
  color: color-mix(in oklab, var(--cat-bg), transparent 30%); text-decoration: none;
  transition: color var(--cat-d-quick) var(--cat-ease-register);
  min-height: 28px; display: inline-flex; align-items: center;
}
[data-design="a"] .rf-footer__links a:hover { color: var(--cat-bg); }
[data-design="a"] .rf-footer__stamp {
  max-width: 1200px; margin: var(--cat-s-span) auto 0;
  padding-inline: clamp(16px, 4vw, 36px);
  padding-top: var(--cat-s-beam); border-top: 1px solid var(--cat-hairline);
  display: flex; gap: var(--cat-s-span); flex-wrap: wrap;
  font-family: var(--cat-font-mono); font-size: 11px; letter-spacing: 0.08em;
  text-transform: uppercase; color: color-mix(in oklab, var(--cat-bg), transparent 50%);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  [data-design="a"] .rf-studio { grid-template-columns: 1fr; gap: var(--cat-s-beam); }
  [data-design="a"] .rf-footer__inner { grid-template-columns: 1fr 1fr; }
  [data-design="a"] .rf-method { grid-template-columns: 52px 1fr; }
  [data-design="a"] .rf-process li { grid-template-columns: 44px 1fr; }
}

@media (max-width: 560px) {
  [data-design="a"] .rf-options { grid-template-columns: 1fr; }
  [data-design="a"] .rf-funnel { padding: var(--cat-s-beam); min-height: 320px; }
  [data-design="a"] .rf-beam__ticks { font-size: 8px; }
  [data-design="a"] .rf-footer__inner { grid-template-columns: 1fr; }
  [data-design="a"] .rf-method { grid-template-columns: 1fr; gap: var(--cat-s-stud); }
  [data-design="a"] .rf-method__num { font-size: 20px; }
  [data-design="a"] .rf-process li { grid-template-columns: 1fr; gap: 6px; }
  [data-design="a"] .rf-drawer { inset: 56px 0 0 0; }
  [data-design="a"] .rf-header__bar { padding-block: 10px; }
  [data-design="a"] .rf-logo__mark { font-size: 15px; }
}

/* ── REDUCED MOTION ── */
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .rf-chain__curve { animation: none; }
  [data-design="a"] .rf-burger span { transition: none; }
  [data-design="a"] .rf-cta { animation: none; }
  [data-design="a"] .rf-cta__cable-line,
  [data-design="a"] .rf-cta__cable-head { transition: none; }
  [data-design="a"] .rf-hg__trace,
  [data-design="a"] .rf-hg__trace--2 { animation: none; opacity: 0.3; }
  [data-design="a"] .rf-hg__node { animation: none; opacity: 0.4; }
  [data-design="a"] .rf-hg__phasor,
  [data-design="a"] .rf-hg__phasor--2 { animation: none; stroke-dashoffset: 0; opacity: 0.25; }
  [data-design="a"] .rf-isobar { animation: none; transform: none; }
  [data-design="a"] .rf-ambient-b.is-live .rf-membrane { animation: none; }
  [data-design="a"] .rf-step,
  [data-design="a"] .rf-step.is-leaving { animation: none; }
  [data-design="a"] .rf-beam__fill { transition: none; }
  [data-design="a"] .cat-pointer__rule { animation: none; opacity: 0.7; }
  [data-design="a"] .cat-pointer__label { animation: none; opacity: 0.7; }
}

/* ── CHROME ISOLATION / MOBILE NO-H-SCROLL CONTRACT ── */
[data-design="a"].dq-design,
[data-design="a"] .dq-design {
  max-width: 100%;
  overflow-x: clip;
}
[data-design="a"].dq-design * {
  min-width: 0;
}
[data-design="a"].dq-design img,
[data-design="a"].dq-design svg:not([data-keep-size]) {
  max-width: 100%;
  height: auto;
}

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