/* ============================================================
   E & Z Construction — Catenary Design / Slot A
   All selectors scoped to [data-design="a"] (never [data-design="a"])
   Token: --design-a-primary
   Frei Otto × Otl Aicher Munich '72 × DIN engineering register
   Motion gate: animate ONLY transform/opacity/clip-path (zero layout props)
   Hover transforms inside @media (hover:hover) and (pointer:fine)
   No scale(0). Entrances: ease-out / custom. Never ease-in entrances.
   ============================================================ */

/* ── Token layer ──────────────────────────────────────────── */
[data-design="a"] {
  --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", "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:   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);

  --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);
  --cat-elev-lift: 0 1px 0 0 var(--cat-hairline),
                   0 0 0 1px color-mix(in oklab, var(--cat-hairline), transparent 50%);

  /* design-a primary token (contract) */
  --design-a-primary: var(--cat-orange);
}

/* ── Mobile no-hscroll guard (contract-mandated) ─────────── */
[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;
}

/* ── Global base ─────────────────────────────────────────── */
[data-design="a"] {
  font-family: var(--cat-font-body);
  color: var(--cat-ink);
  background: var(--cat-bg);
  box-sizing: border-box;
}
[data-design="a"].dq-design *,
[data-design="a"].dq-design *::before,
[data-design="a"].dq-design *::after { box-sizing: inherit; }


/* ============================================================
   E1 — ANIMATED MINIMALIST HEADER
   Three things: logo · hanging chain (ambient) · hamburger
   ============================================================ */
[data-design="a"] .rf-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--cat-bg);
  border-bottom: 1px solid var(--cat-mist);
}
/* Hanging chain atmospheric layer */
[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: 40px; height: 40px; 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;
}
@media (hover: hover) and (pointer: fine) {
  [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: 50; 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);
  padding-top: var(--cat-s-beam);
}
[data-design="a"] .rf-drawer__phone {
  font-family: var(--cat-font-mono); font-size: 18px;
  color: var(--cat-graphite); text-decoration: none;
  letter-spacing: 0.04em;
}

@media (max-width: 560px) {
  [data-design="a"] .rf-header__bar { padding-block: 10px; }
  [data-design="a"] .rf-logo__mark { font-size: 16px; }
  [data-design="a"] .rf-drawer { inset: 56px 0 0 0; }
}

@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .rf-chain__curve { animation: none; }
  [data-design="a"] .rf-burger span { transition: none; }
}


/* ============================================================
   E3 — UNIQUE ANIMATED HERO BACKDROP
   Catenary cable system — perceptible ambient gravitational settle
   One layer, arrival + sustained ambient, no directional primitive
   ============================================================ */
[data-design="a"] .rf-hero {
  position: relative; overflow: hidden;
  min-height: clamp(520px, 72vh, 800px);
  display: flex; align-items: center;
  background: var(--cat-bg);
}
[data-design="a"] .rf-hero__backdrop {
  position: absolute; inset: 0; z-index: 0;
  pointer-events: none; overflow: hidden;
}
/* Blueprint grid — visible color field at first paint, ≥0.25 opacity */
[data-design="a"] .rf-hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, color-mix(in oklab, var(--cat-cyan), transparent 72%) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in oklab, var(--cat-cyan), transparent 72%) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.28;
}
/* Catenary cable SVG — ambient gravitational settle, ongoing */
[data-design="a"] .rf-hero__cables {
  position: absolute; inset: 0;
  width: 100%; height: 100%; display: block;
}
/* Primary structural cable — heavy settle */
[data-design="a"] .rf-hc--main {
  fill: none; stroke: var(--cat-hairline); stroke-width: 2;
  vector-effect: non-scaling-stroke;
  transform-origin: 50% 0%; transform-box: fill-box;
  animation: cat-hc-main-settle 14s var(--cat-ease-settle) infinite alternate;
}
@keyframes cat-hc-main-settle {
  0%   { transform: scaleY(0.94) translateY(0px);   }
  50%  { transform: scaleY(1.06) translateY(8px);   }
  100% { transform: scaleY(0.97) translateY(-3px);  }
}
/* Secondary cable */
[data-design="a"] .rf-hc--sub {
  fill: none;
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 40%);
  stroke-width: 1.2; vector-effect: non-scaling-stroke;
  transform-origin: 50% 0%; transform-box: fill-box;
  animation: cat-hc-sub-settle 20s var(--cat-ease-settle) infinite alternate;
  animation-delay: -5s;
}
@keyframes cat-hc-sub-settle {
  0%   { transform: scaleY(0.96) translateY(0px);  }
  50%  { transform: scaleY(1.04) translateY(5px);  }
  100% { transform: scaleY(0.98) translateY(-2px); }
}
/* Stress isobar lines — cyan, slow horizontal flow */
[data-design="a"] .rf-hc--iso1,
[data-design="a"] .rf-hc--iso2,
[data-design="a"] .rf-hc--iso3 {
  fill: none; stroke: var(--cat-cyan); stroke-width: .8;
  stroke-dasharray: 6 8; vector-effect: non-scaling-stroke;
  opacity: 0.4;
}
[data-design="a"] .rf-hc--iso1 { animation: cat-iso-flow 16s linear infinite; }
[data-design="a"] .rf-hc--iso2 { animation: cat-iso-flow 21s linear infinite; animation-delay: -7s; }
[data-design="a"] .rf-hc--iso3 { animation: cat-iso-flow 27s linear infinite; animation-delay: -14s; }
@keyframes cat-iso-flow {
  0%   { stroke-dashoffset: 0;    transform: translateX(0);    }
  50%  { stroke-dashoffset: -60;  transform: translateX(-16px); }
  100% { stroke-dashoffset: -120; transform: translateX(0);    }
}
/* Anchor pins */
[data-design="a"] .rf-hc__pin    { fill: var(--cat-orange); }
[data-design="a"] .rf-hc__pin--sub { fill: color-mix(in oklab, var(--cat-orange), transparent 30%); }
/* Dimension annotation — draw-in via clip-path, then stays */
[data-design="a"] .rf-hc__dim-v {
  stroke: color-mix(in oklab, var(--cat-orange), transparent 40%);
  stroke-width: .8; vector-effect: non-scaling-stroke;
  animation: cat-dim-appear 1.2s var(--cat-ease-unfurl) 1s both;
}
[data-design="a"] .rf-hc__dim-h1,
[data-design="a"] .rf-hc__dim-h2 {
  stroke: var(--cat-orange); stroke-width: 1;
  vector-effect: non-scaling-stroke;
  animation: cat-dim-appear 0.6s var(--cat-ease-unfurl) 1.8s both;
}
[data-design="a"] .rf-hc__dim-txt {
  font-family: var(--cat-font-mono); font-size: 11px;
  fill: var(--cat-orange); letter-spacing: 0.12em;
  animation: cat-dim-appear 0.5s var(--cat-ease-unfurl) 2.2s both;
}
@keyframes cat-dim-appear {
  from { opacity: 0; transform: translateX(4px); }
  to   { opacity: 1; transform: translateX(0); }
}
/* Load node — slow pulse, sustains ambient life */
[data-design="a"] .rf-hc__node {
  fill: var(--cat-orange);
  animation: cat-node-pulse 8s var(--cat-ease-settle) infinite alternate;
}
@keyframes cat-node-pulse {
  0%   { opacity: 0.6; transform: scale(0.92); }
  50%  { opacity: 1.0; transform: scale(1.15); }
  100% { opacity: 0.7; transform: scale(0.96); }
}

/* Hero text content — z-index above backdrop, opacity:1 at FIRST PAINT */
[data-design="a"] .rf-hero__content {
  position: relative; z-index: 1;
  max-width: 1440px; margin-inline: auto; width: 100%;
  padding: clamp(64px, 10vh, 120px) clamp(16px, 4vw, 36px);
  display: flex; flex-direction: column; align-items: flex-start; gap: var(--cat-s-beam);
}
[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(48px, 9vw, 92px);
  font-weight: 600; letter-spacing: -0.03em; line-height: 1.0;
  color: var(--cat-ink); margin: 0; max-width: 16ch;
}
[data-design="a"] .rf-hero__subtitle {
  font-family: var(--cat-font-body);
  font-size: clamp(17px, 2.2vw, 22px); line-height: 1.55;
  color: var(--cat-graphite); margin: 0; max-width: 52ch;
}
[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;
}

@media (max-width: 560px) {
  [data-design="a"] .rf-hero { min-height: 100svh; }
}

@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .rf-hc--main,
  [data-design="a"] .rf-hc--sub,
  [data-design="a"] .rf-hc--iso1,
  [data-design="a"] .rf-hc--iso2,
  [data-design="a"] .rf-hc--iso3 { animation: none; }
  [data-design="a"] .rf-hc__node { animation: none; opacity: 0.8; }
  [data-design="a"] .rf-hc__dim-v,
  [data-design="a"] .rf-hc__dim-h1,
  [data-design="a"] .rf-hc__dim-h2,
  [data-design="a"] .rf-hc__dim-txt { animation: none; opacity: 1; }
}


/* ============================================================
   E2 — ANIMATED FUNNEL-ANCHOR CTA (tensor)
   ============================================================ */
[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; min-height: 44px;
}
[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;
}
@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-cta:focus-visible {
  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;
}
[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); }
}

@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .rf-cta { animation: none; }
  [data-design="a"] .rf-cta__cable-line,
  [data-design="a"] .rf-cta__cable-head { transition: none; }
}


/* ============================================================
   E6 — POINTER (dimension-line drafted wayfinding)
   data-mf-role="pointer" — LAST thing before #funnel
   NOT a button. Computed opacity > 0.5, height > 8px.
   ============================================================ */
[data-design="a"] .cat-pointer {
  display: flex; justify-content: center;
  padding: clamp(40px, 8vw, 80px) 16px clamp(56px, 10vw, 96px);
}
[data-design="a"] .cat-pointer__hit {
  position: relative; display: inline-flex;
  flex-direction: column; align-items: center; gap: 8px;
  text-decoration: none; color: var(--cat-ink);
}
[data-design="a"] .cat-pointer__tick {
  display: block; width: 16px; height: 2px;
  background: var(--cat-hairline); opacity: 0.7;
}
[data-design="a"] .cat-pointer__rule {
  display: block; width: 1px; height: 64px;
  background: var(--cat-hairline);
  transform-origin: top center;
  animation: cat-pointer-extend 5s var(--cat-ease-settle) infinite;
}
[data-design="a"] .cat-pointer__label {
  font-family: var(--cat-font-mono); font-size: 11px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--cat-stone);
  animation: cat-pointer-stamp 5s var(--cat-ease-settle) infinite;
}

@keyframes cat-pointer-extend {
  0%, 100% { transform: scaleY(0.5); opacity: 0.45; }
  50%      { transform: scaleY(1);   opacity: 0.9;  }
}
@keyframes cat-pointer-stamp {
  0%, 25%, 100% { opacity: 0.2;  }
  50%, 75%      { opacity: 0.85; }
}

@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .cat-pointer__rule { animation: none; opacity: 0.7; transform: none; }
  [data-design="a"] .cat-pointer__label { animation: none; opacity: 0.7; }
}


/* ============================================================
   E5 — FUNNEL (5-step qualifying project intake)
   id="funnel" data-mf-role="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(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-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;
}

/* 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(5, 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: 4px; }

/* Funnel 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;
}
[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);
  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="a"] .rf-options label:hover { border-color: var(--cat-orange); }
}
[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%);
}

/* Members (text inputs) */
[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%);
}

/* Tensor buttons (funnel nav) */
[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);
  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);
  min-height: 44px;
}
[data-design="a"] .rf-tensor--primary {
  background: var(--cat-orange); color: var(--cat-bg);
  border-color: var(--cat-orange);
}
@media (hover: hover) and (pointer: fine) {
  [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 (confirmation) */
[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;
}

[data-design="a"] .rf-funnel__trust {
  max-width: 880px; margin: var(--cat-s-beam) auto 0;
  padding-inline: clamp(16px, 4vw, 36px);
  display: flex; flex-direction: column; gap: var(--cat-s-stud);
  font-family: var(--cat-font-mono); font-size: 12px;
  letter-spacing: 0.06em; color: var(--cat-stone);
}
[data-design="a"] .rf-funnel__phone {
  color: var(--cat-graphite); text-decoration: none;
  font-family: var(--cat-font-mono); font-size: 12px;
}

@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: 9px; }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .rf-step,
  [data-design="a"] .rf-step.is-leaving { animation: none; }
  [data-design="a"] .rf-beam__fill { transition: none; }
}


/* ============================================================
   TRIAD-2 — Scroll-linked parallax (hero → content handoff)
   Hero backdrop translates vertically as user scrolls.
   JS drives --scroll-ratio custom prop on the hero. GPU-only (transform).
   ============================================================ */
[data-design="a"] .rf-hero__backdrop {
  will-change: transform;
}


/* ============================================================
   E3-A (ambient A) — SERVICES / CAPABILITIES
   Principal-stress isobar ambient segment
   ============================================================ */
[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);
}
[data-design="a"] .rf-method:last-child { border-bottom: 1px solid var(--cat-hairline); }
@media (hover: hover) and (pointer: fine) {
  [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: 22px; 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: 1.55; font-size: 16px;
}

@media (max-width: 768px) {
  [data-design="a"] .rf-method { grid-template-columns: 1fr; gap: var(--cat-s-stud); }
  [data-design="a"] .rf-method__num { font-size: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .rf-isobar { animation: none; transform: none; }
}


/* ============================================================
   PORTFOLIO
   ============================================================ */
[data-design="a"] .rf-portfolio {
  padding-block: var(--cat-s-frame);
  background: var(--cat-surface);
  border-block: 1px solid var(--cat-mist);
}
[data-design="a"] .rf-portfolio__inner {
  max-width: 1200px; margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="a"] .rf-portfolio__note {
  font-family: var(--cat-font-body); font-size: 15px;
  color: var(--cat-stone); line-height: 1.55; margin: 0 0 var(--cat-s-span);
  max-width: 68ch;
}
[data-design="a"] .rf-portfolio__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--cat-s-beam);
  margin-bottom: var(--cat-s-frame);
}
[data-design="a"] .rf-project {
  border: 1px solid var(--cat-hairline); border-radius: var(--cat-r-edge);
  background: var(--cat-bg); overflow: hidden;
}
[data-design="a"] .rf-project__img-wrap--placeholder {
  aspect-ratio: 16 / 9; background: var(--cat-mist);
  position: relative;
}
[data-design="a"] .rf-project__img-wrap--placeholder::after {
  content: "";
  position: absolute; inset: 0;
  background:
    repeating-linear-gradient(
      -45deg,
      color-mix(in oklab, var(--cat-hairline), transparent 80%) 0,
      color-mix(in oklab, var(--cat-hairline), transparent 80%) 1px,
      transparent 1px, transparent 12px
    );
}
[data-design="a"] .rf-project__meta {
  padding: var(--cat-s-beam);
  display: flex; flex-direction: column; gap: var(--cat-s-stud);
}
[data-design="a"] .rf-project__num {
  font-family: var(--cat-font-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--cat-orange);
}
[data-design="a"] .rf-project__title {
  font-family: var(--cat-font-display); font-size: 20px;
  font-weight: 500; color: var(--cat-ink); letter-spacing: -0.01em; margin: 0;
}
[data-design="a"] .rf-project__type {
  font-family: var(--cat-font-mono); font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--cat-stone); margin: 0;
}
[data-design="a"] .rf-project__desc {
  font-family: var(--cat-font-body); font-size: 15px;
  color: var(--cat-graphite); line-height: 1.55; margin: 0; max-width: 55ch;
}
[data-design="a"] .rf-portfolio__cta {
  display: flex; justify-content: flex-start;
  padding-top: var(--cat-s-span);
}


/* ============================================================
   E4 (ambient B) — PROCESS / ABOUT
   Soap-film membrane (Frei Otto net) — different motion from A
   ============================================================ */
[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); max-width: 60ch;
}
[data-design="a"] .rf-studio__copy p { margin: 0 0 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: 13px;
  color: var(--cat-ink); margin: 0; font-variant-numeric: tabular-nums;
}

/* Process steps inside studio copy */
[data-design="a"] .rf-process-steps {
  display: flex; flex-direction: column; gap: var(--cat-s-stud);
  margin-top: var(--cat-s-beam);
}
[data-design="a"] .rf-ps {
  display: grid; grid-template-columns: 40px 1fr; gap: var(--cat-s-beam);
  padding: var(--cat-s-stud) 0; border-top: 1px solid var(--cat-mist);
  align-items: start;
}
[data-design="a"] .rf-ps__num {
  font-family: var(--cat-font-mono); color: var(--cat-orange);
  font-size: 16px; letter-spacing: 0.04em; padding-top: 3px;
}
[data-design="a"] .rf-ps strong {
  display: block; font-family: var(--cat-font-display); font-size: 17px;
  font-weight: 500; color: var(--cat-ink); margin: 0 0 4px;
}
[data-design="a"] .rf-ps p { margin: 0; font-size: 15px; color: var(--cat-graphite); line-height: 1.5; }

/* Membrane motion */
[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); }
}

@media (max-width: 768px) {
  [data-design="a"] .rf-studio { grid-template-columns: 1fr; gap: var(--cat-s-beam); }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .rf-ambient-b.is-live .rf-membrane { animation: none; }
}


/* ============================================================
   FOOTER
   ============================================================ */
[data-design="a"] .rf-footer {
  background: var(--cat-bg);
  border-top: 1px solid var(--cat-hairline);
  padding-block: var(--cat-s-frame);
}
[data-design="a"] .rf-footer__beam {
  height: 1px; background: var(--cat-hairline);
  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: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--cat-s-frame);
}
[data-design="a"] .rf-footer__firm {
  font-family: var(--cat-font-display); font-size: 18px; font-weight: 600;
  color: var(--cat-ink); margin: 0 0 var(--cat-s-stud); letter-spacing: -0.01em;
}
[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-stone); margin: 0 0 var(--cat-s-stud);
}
[data-design="a"] .rf-footer__area {
  font-family: var(--cat-font-body); font-size: 14px; color: var(--cat-graphite);
  line-height: 1.55; margin: 0;
}
[data-design="a"] .rf-footer__mono-label {
  font-family: var(--cat-font-mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--cat-stone); margin: 0 0 var(--cat-s-stud);
}
[data-design="a"] .rf-footer__phone {
  display: block; font-family: var(--cat-font-display); font-size: 18px;
  color: var(--cat-ink); text-decoration: none; margin-bottom: var(--cat-s-stud);
}
[data-design="a"] .rf-footer__cta-link {
  font-family: var(--cat-font-mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--cat-orange); text-decoration: none;
}
[data-design="a"] .rf-footer__area-detail {
  font-family: var(--cat-font-body); font-size: 14px; color: var(--cat-graphite);
  line-height: 1.55; margin: 0 0 var(--cat-s-beam);
}
[data-design="a"] .rf-footer__copy {
  font-family: var(--cat-font-mono); font-size: 11px; letter-spacing: 0.06em;
  color: var(--cat-stone); margin: 0;
}


/* ============================================================
   Reduced-motion global fallbacks
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .rf-cta { animation: none; }
  [data-design="a"] .cat-pointer__rule { animation: none; opacity: 0.7; transform: none; }
  [data-design="a"] .cat-pointer__label { animation: none; opacity: 0.7; }
}


/* ============================================================
   Phase-3.4 hero visibility floor
   Hero text + CTA text: opacity:1 always — never reveal-gated
   ============================================================ */
[data-design="a"] [data-mf-role="hero"] :is(h1,h2,p,span,a),
[data-design="a"] [data-mf-role="cta"] { opacity: 1 !important; }