/* ═══════════════════════════════════════════════════════════════
   CATENARY — Design A — 24/8 Concrete Construction
   All selectors scoped to [data-design="a"].dq-design
   MOTION GATE: zero transitions on layout props (width/height/top/left/margin/padding)
   All animations use transform / opacity / clip-path only
   All :hover/:focus-visible transforms inside @media (hover:hover) and (pointer:fine)
   ═══════════════════════════════════════════════════════════════ */

/* ── Token system ── */
[data-design="a"] {
  --design-a-primary:      #E9601F;

  --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;

  --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;

  --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;

  --cat-d-quick:  140ms;
  --cat-d-base:   220ms;
  --cat-d-settle: 520ms;
  --cat-d-span:   26s;

  --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);

  --cat-r-none:  0px;
  --cat-r-edge:  2px;
  --cat-r-pill:  999px;

  --cat-elev-flat: none;
  --cat-elev-ring: inset 0 0 0 1px var(--cat-hairline);

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

/* ── Horizontal scroll prevention ── */
[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;
}

/* ════════════════════════════════════════════════════════════════
   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);
}

/* Atmospheric layer: hanging chain */
[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;
}

[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);
}
[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[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 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;
}
[data-design="a"] .rf-drawer a::before {
  content: attr(data-num); color: var(--cat-orange); font-size: .72em;
}
[data-design="a"] .rf-drawer__ctas {
  display: flex; flex-direction: column; gap: var(--cat-s-stud);
  margin-top: var(--cat-s-beam);
  border: none; /* override the a border */
}
[data-design="a"] .rf-drawer__ctas a { border-bottom: none; }
[data-design="a"] .rf-drawer__phone {
  font-family: var(--cat-font-mono); font-size: 18px; letter-spacing: 0.04em;
  color: var(--cat-graphite); text-decoration: none;
  grid-template-columns: unset; display: block; padding: var(--cat-s-stud) 0;
}
[data-design="a"] .rf-drawer__phone::before { content: none; }

/* ════════════════════════════════════════════════════════════════
   HERO — unique animated backdrop (dimension-line drafting)
   ════════════════════════════════════════════════════════════════ */
[data-design="a"] .rf-hero {
  position: relative; isolation: isolate;
  min-height: clamp(480px, 72vh, 680px);
  display: flex; align-items: center;
  overflow: hidden;
  background: var(--cat-bg);
  padding-block: var(--cat-s-grid) var(--cat-s-span);
}

/* Animated backdrop — dimension-line drafting hero */
[data-design="a"] .rf-hero__backdrop {
  position: absolute; inset: 0; z-index: 0;
  pointer-events: none;
}
[data-design="a"] .rf-hero__svg {
  width: 100%; height: 100%;
  display: block;
}

/* Grid lines */
[data-design="a"] .rf-hero__grid line {
  stroke: var(--cat-cyan);
  stroke-width: 0.5;
  vector-effect: non-scaling-stroke;
}

/* Catenary curves — the suspended chain motif, ongoing ambient motion */
[data-design="a"] .rf-hero__catenary {
  fill: none;
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
  stroke-linecap: round;
}
[data-design="a"] .rf-hero__catenary--main {
  stroke: var(--cat-cyan);
  opacity: 0.55;
  animation: cat-hero-catenary-sway 14s var(--cat-ease-settle) infinite alternate;
  transform-origin: 50% 0%;
  transform-box: fill-box;
}
[data-design="a"] .rf-hero__catenary--secondary {
  stroke: var(--cat-cyan);
  opacity: 0.25;
  animation: cat-hero-catenary-sway 18s var(--cat-ease-settle) infinite alternate-reverse;
  transform-origin: 50% 0%;
  transform-box: fill-box;
  animation-delay: -5s;
}

@keyframes cat-hero-catenary-sway {
  0%   { transform: scaleY(0.94) translateY(0px); }
  35%  { transform: scaleY(1.06) translateY(6px); }
  65%  { transform: scaleY(0.97) translateY(-3px); }
  100% { transform: scaleY(1.03) translateY(4px); }
}

/* Dimension lines — draw in via scaleX from transform-origin */
[data-design="a"] .rf-hero__dims {
  transform-origin: left center;
  animation: cat-hero-dims-arrive 1.8s var(--cat-ease-unfurl) both;
}
@keyframes cat-hero-dims-arrive {
  from { transform: scaleX(0); opacity: 0; }
  to   { transform: scaleX(1); opacity: 1; }
}
[data-design="a"] .rf-hero__dim-line {
  stroke: var(--cat-hairline);
  stroke-width: 0.75;
  vector-effect: non-scaling-stroke;
  opacity: 0.45;
}
[data-design="a"] .rf-hero__dim-tick {
  stroke: var(--cat-hairline);
  stroke-width: 0.75;
  vector-effect: non-scaling-stroke;
  opacity: 0.45;
}
[data-design="a"] .rf-hero__pin {
  fill: var(--cat-orange);
  opacity: 0.9;
}
[data-design="a"] .rf-hero__dim-label {
  font-family: var(--cat-font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  fill: var(--cat-stone);
  text-anchor: middle;
  opacity: 0.6;
}

/* Hero text — always opacity:1 at first paint */
[data-design="a"] .rf-hero__content {
  position: relative; z-index: 1;
  max-width: 1200px; margin-inline: auto;
  padding-inline: clamp(16px, 5vw, 60px);
  display: flex; flex-direction: column; align-items: flex-start; gap: var(--cat-s-beam);
  animation: cat-hero-content-arrive 0.9s var(--cat-ease-unfurl) both;
}
@keyframes cat-hero-content-arrive {
  from { opacity: 0.6; transform: translateY(-10px); }
  to   { opacity: 1;   transform: translateY(0); }
}
[data-design="a"] .rf-hero__eyebrow {
  font-family: var(--cat-font-mono); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--cat-orange); margin: 0;
}
[data-design="a"] .rf-hero__headline {
  font-family: var(--cat-font-display);
  font-size: clamp(32px, 5.5vw, 72px);
  font-weight: 600; letter-spacing: -0.02em; line-height: 1.08;
  color: var(--cat-ink); margin: 0;
  max-width: 16ch;
}
[data-design="a"] .rf-hero__subtitle {
  font-family: var(--cat-font-body);
  font-size: clamp(16px, 2vw, 20px);
  color: var(--cat-graphite); margin: 0;
  max-width: 52ch; line-height: 1.5;
}
[data-design="a"] .rf-hero__proof {
  font-family: var(--cat-font-mono);
  font-size: 12px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--cat-stone);
  margin: 0;
}
[data-design="a"] .rf-hero__trust {
  margin-top: var(--cat-s-stud);
}

/* ════════════════════════════════════════════════════════════════
   E2 — Animated CTA (tensor / funnel anchor)
   ════════════════════════════════════════════════════════════════ */
[data-design="a"] .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; cursor: pointer;
  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: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__cable {
  width: 44px; 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);
}

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

/* Hover/focus transforms gated on hover-capable devices */
@media (hover: hover) and (pointer: fine) {
  [data-design="a"] .rf-cta:hover {
    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:hover .rf-cta__cable-line {
    transform: translateY(-1px);
  }
  [data-design="a"] .rf-drawer a:hover {
    color: var(--cat-orange);
  }
  [data-design="a"] .rf-method:hover {
    border-top-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-options label:hover {
    border-color: var(--cat-orange);
  }
  [data-design="a"] .rf-process__step:hover .rf-process__num {
    transform: scale(1.08);
  }
}

/* Drawer CTA variant */
[data-design="a"] .rf-cta--drawer {
  display: inline-flex; width: auto;
  grid-template-columns: unset;
}
[data-design="a"] .rf-cta--drawer::before { content: none; }

/* Footer CTA variant */
[data-design="a"] .rf-cta--footer {
  animation: cat-cta-breath 4.5s var(--cat-ease-settle) infinite;
}

/* ════════════════════════════════════════════════════════════════
   MARKER (badge)
   ════════════════════════════════════════════════════════════════ */
[data-design="a"] .rf-marker {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--cat-r-pill);
  font-family: var(--cat-font-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.08em;
}
[data-design="a"] .rf-marker--in-spec {
  background: color-mix(in oklab, var(--cat-olive), transparent 88%);
  color: var(--cat-olive);
  border: 1px solid color-mix(in oklab, var(--cat-olive), transparent 70%);
}

/* ════════════════════════════════════════════════════════════════
   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-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-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 (Project intake — Load Cases)
   ════════════════════════════════════════════════════════════════ */
[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-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;
}
[data-design="a"] .rf-funnel__expect {
  font-family: var(--cat-font-mono); font-size: 12px;
  color: var(--cat-stone); margin: var(--cat-s-stud) 0 0;
  letter-spacing: 0.04em;
}

/* 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: 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="a"] .rf-beam__ticks {
  position: absolute; inset: 16px 0 auto 0;
  display: grid; grid-template-columns: repeat(4, 1fr);
  list-style: none; margin: 0; padding: 0;
  font-family: var(--cat-font-mono); font-size: 11px;
  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: 6px;
  border-top: 1px solid var(--cat-hairline);
}
[data-design="a"] .rf-beam__ticks li span { color: var(--cat-orange); margin-right: 6px; }

/* Step panels */
[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;
}
[data-design="a"] .rf-step__q {
  font-family: var(--cat-font-display); font-size: clamp(22px, 3vw, 28px);
  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 (radio 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);
  border: 1px solid var(--cat-hairline); border-radius: var(--cat-r-edge);
  font-size: 15px; cursor: pointer; color: var(--cat-ink);
  min-height: 44px;
  transition:
    border-color var(--cat-d-quick) var(--cat-ease-register),
    background-color var(--cat-d-quick) linear;
}
[data-design="a"] .rf-options input[type="radio"] { accent-color: var(--cat-orange); }
[data-design="a"] .rf-options label:has(input:checked) {
  border-color: var(--cat-orange);
  background: color-mix(in oklab, var(--cat-orange), transparent 92%);
}

/* Form fields */
[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--full { grid-column: 1 / -1; }
[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;
  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%);
}

/* Navigation buttons */
[data-design="a"] .rf-step__nav {
  display: flex; justify-content: space-between; gap: var(--cat-s-stud);
  margin-top: var(--cat-s-beam);
}
[data-design="a"] .rf-step__nav:has(.rf-tensor:only-child) { justify-content: flex-end; }
[data-design="a"] .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;
  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="a"] .rf-tensor--primary {
  background: var(--cat-orange); color: var(--cat-bg); border-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 */
[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;
}

/* Below-funnel compliance */
[data-design="a"] .rf-funnel__below {
  max-width: 880px; margin-inline: auto;
  padding: var(--cat-s-beam) clamp(16px, 4vw, 36px) 0;
  display: flex; flex-wrap: wrap; gap: var(--cat-s-beam);
  align-items: center; justify-content: space-between;
  border-top: 1px solid var(--cat-mist); margin-top: var(--cat-s-beam);
}
[data-design="a"] .rf-funnel__compliance {
  font-family: var(--cat-font-mono); font-size: 12px;
  color: var(--cat-stone); letter-spacing: 0.06em;
  text-transform: uppercase; margin: 0;
}
[data-design="a"] .rf-funnel__phone-link {
  font-family: var(--cat-font-mono); font-size: 13px;
  color: var(--cat-graphite); text-decoration: none;
  letter-spacing: 0.04em;
}

/* ════════════════════════════════════════════════════════════════
   E3 — SERVICES / ambient-a (isobar flow)
   ════════════════════════════════════════════════════════════════ */
[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-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(36px, 6vw, 52px);
  font-weight: 500; letter-spacing: -0.02em; line-height: 1.05;
  color: var(--cat-ink); margin: 0 0 var(--cat-s-span); max-width: 22ch;
}
[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);
}
[data-design="a"] .rf-method:last-child { border-bottom: 1px solid var(--cat-hairline); }
[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: 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;
}

/* Repeated funnel CTA */
[data-design="a"] .rf-repeat-cta {
  display: flex; justify-content: center;
  padding: var(--cat-s-span) clamp(16px, 4vw, 36px);
  background: var(--cat-bg);
  border-top: 1px solid var(--cat-mist);
}

/* ════════════════════════════════════════════════════════════════
   E4 — ABOUT / ambient-b (soap-film 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: 1.65;
  color: var(--cat-graphite);
}
[data-design="a"] .rf-studio__copy p { margin: 0 0 var(--cat-s-beam); max-width: 60ch; }
[data-design="a"] .rf-studio__tagline {
  font-family: var(--cat-font-display); font-size: 22px;
  color: var(--cat-ink); letter-spacing: -0.01em;
  margin-top: var(--cat-s-beam);
}
[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);
}
[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: 16px;
  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); }
}

/* ════════════════════════════════════════════════════════════════
   PROCESS
   ════════════════════════════════════════════════════════════════ */
[data-design="a"] .rf-process {
  padding-block: var(--cat-s-frame);
  background: var(--cat-bg);
}
[data-design="a"] .rf-process__inner {
  max-width: 1200px; margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="a"] .rf-process__steps {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column;
}
[data-design="a"] .rf-process__step {
  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);
}
[data-design="a"] .rf-process__step:last-child { border-bottom: 1px solid var(--cat-hairline); }
[data-design="a"] .rf-process__num {
  font-family: var(--cat-font-mono); color: var(--cat-orange);
  font-size: 26px; letter-spacing: 0.04em;
  transition: transform var(--cat-d-base) var(--cat-ease-unfurl);
}
[data-design="a"] .rf-process__step h3 {
  font-family: var(--cat-font-display); font-size: 22px; font-weight: 500;
  color: var(--cat-ink); margin: 0 0 var(--cat-s-stud); letter-spacing: -0.01em;
}
[data-design="a"] .rf-process__step p {
  color: var(--cat-graphite); margin: 0; line-height: 1.55; max-width: 56ch;
}

/* ════════════════════════════════════════════════════════════════
   FOOTER — drafting title block
   ════════════════════════════════════════════════════════════════ */
[data-design="a"] .rf-footer {
  background: var(--cat-ink); color: var(--cat-bg);
  padding-block: 0 var(--cat-s-span);
}
[data-design="a"] .rf-footer__beam {
  height: 4px; background: var(--cat-orange);
}
[data-design="a"] .rf-footer__inner {
  max-width: 1200px; margin-inline: auto;
  padding: var(--cat-s-frame) clamp(16px, 4vw, 36px) var(--cat-s-beam);
  display: grid; grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--cat-s-span); align-items: start;
}
[data-design="a"] .rf-footer__firm {
  font-family: var(--cat-font-display); font-size: 20px; font-weight: 600;
  color: var(--cat-bg); margin: 0 0 var(--cat-s-stud);
}
[data-design="a"] .rf-footer__tagline {
  font-family: var(--cat-font-body); font-size: 14px;
  color: color-mix(in oklab, var(--cat-bg), transparent 40%);
  margin: 0 0 var(--cat-s-stud); font-style: italic;
}
[data-design="a"] .rf-footer__license {
  font-family: var(--cat-font-mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--cat-mist); margin: 0;
}
[data-design="a"] .rf-footer__label {
  font-family: var(--cat-font-mono); font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--cat-stone); margin: 0 0 var(--cat-s-stud);
}
[data-design="a"] .rf-footer__contact {
  display: block; font-family: var(--cat-font-mono); font-size: 14px;
  color: var(--cat-mist); text-decoration: none; margin-bottom: 6px;
  letter-spacing: 0.02em;
}
[data-design="a"] .rf-footer__location {
  font-family: var(--cat-font-mono); font-size: 13px;
  color: var(--cat-stone); margin: var(--cat-s-stud) 0 var(--cat-s-stud);
}
[data-design="a"] .rf-footer__hours {
  font-family: var(--cat-font-mono); font-size: 12px; letter-spacing: 0.04em;
  color: var(--cat-stone); line-height: 1.7; margin: 0;
}
[data-design="a"] .rf-footer__area {
  font-family: var(--cat-font-mono); font-size: 12px; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--cat-stone); margin: var(--cat-s-beam) 0 0;
}
[data-design="a"] .rf-footer__copy {
  font-family: var(--cat-font-mono); font-size: 11px;
  color: var(--cat-stone); margin: var(--cat-s-stud) 0 0;
}

/* Footer CTA styling */
[data-design="a"] .rf-cta--footer {
  background: var(--cat-orange); color: var(--cat-bg);
}

/* ════════════════════════════════════════════════════════════════
   SCROLL-DRIVEN PARALLAX — TRIAD-2 (scroll-linked motion)
   Hero backdrop and section entrances use scroll-timeline
   ════════════════════════════════════════════════════════════════ */
@supports (animation-timeline: scroll()) {
  [data-design="a"] .rf-hero__backdrop {
    animation: cat-hero-parallax linear both;
    animation-timeline: scroll(root block);
    animation-range: 0% 35%;
  }
  @keyframes cat-hero-parallax {
    from { transform: translateY(0); }
    to   { transform: translateY(60px); }
  }

  [data-design="a"] .rf-ambient-a {
    animation: cat-section-drift linear both;
    animation-timeline: view(block);
    animation-range: entry 0% entry 40%;
  }
  @keyframes cat-section-drift {
    from { transform: translateY(24px); opacity: 0.7; }
    to   { transform: translateY(0);    opacity: 1; }
  }

  [data-design="a"] .rf-process {
    animation: cat-section-drift linear both;
    animation-timeline: view(block);
    animation-range: entry 0% entry 40%;
  }
}

/* ════════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  [data-design="a"] .rf-studio { grid-template-columns: 1fr; gap: var(--cat-s-beam); }
  [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-footer__inner { grid-template-columns: 1fr; gap: var(--cat-s-beam); }
  [data-design="a"] .rf-process__step { grid-template-columns: 1fr; gap: var(--cat-s-stud); }
  [data-design="a"] .rf-process__num { font-size: 20px; }
}

@media (max-width: 560px) {
  [data-design="a"] .rf-header__bar { padding-block: 10px; }
  [data-design="a"] .rf-logo__mark { font-size: 15px; }
  [data-design="a"] .rf-drawer { inset: 56px 0 0 0; }
  [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: 9px; }
  [data-design="a"] .rf-members { grid-template-columns: 1fr; }
}

/* ════════════════════════════════════════════════════════════════
   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-hero__catenary--main,
  [data-design="a"] .rf-hero__catenary--secondary { animation: none; }
  [data-design="a"] .rf-hero__dims { animation: none; opacity: 1; transform: none; }
  [data-design="a"] .rf-hero__content { animation: none; opacity: 1; transform: 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"] .cat-pointer__rule,
  [data-design="a"] .cat-pointer__label { animation: none; opacity: 0.7; }
  [data-design="a"] .rf-isobar { animation: 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"] .rf-hero__backdrop { animation: none; }
  [data-design="a"] .rf-ambient-a { animation: none; }
  [data-design="a"] .rf-process { animation: none; }
}

/* 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; }