/* =============================================================
   7J Consulting & Construction — Design A: Catenary
   Scoped under [data-design="a"]
   ============================================================= */

/* ---- Design primary exposed for chrome-kit bar swatch ---- */
[data-design="a"] {
  --design-a-primary: #E9601F;
}

/* ---- Catenary token system ---- */
[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", "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:   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%);

  font-family: var(--cat-font-body);
  background: var(--cat-bg);
  color: var(--cat-ink);
  line-height: 1.5;
}

/* =============================================================
   ELEMENT 1 — Animated header (catenary chain)
   ============================================================= */

[data-design="catenary"] .rf-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--cat-bg);
  border-bottom: 1px solid var(--cat-mist);
}
[data-design="catenary"] .rf-chain {
  position: absolute; inset: 0 0 auto 0; height: 100%;
  pointer-events: none; overflow: hidden;
}
[data-design="catenary"] .rf-chain svg { width: 100%; height: 100%; display: block; }
[data-design="catenary"] .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="catenary"] .rf-chain__curve--2 {
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 35%);
  animation-duration: 22s; animation-delay: -6s;
}
[data-design="catenary"] .rf-chain__curve--3 {
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 60%);
  animation-duration: 31s; animation-delay: -12s;
}
[data-design="catenary"] .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="catenary"] .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="catenary"] .rf-logo { text-decoration: none; color: var(--cat-ink); }
[data-design="catenary"] .rf-logo__mark {
  font-family: var(--cat-font-display);
  font-size: clamp(15px, 2vw, 18px); font-weight: 600; letter-spacing: -0.01em;
}
[data-design="catenary"] .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="catenary"] .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="catenary"] .rf-burger:hover { border-color: var(--cat-orange); }
[data-design="catenary"] .rf-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
[data-design="catenary"] .rf-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
[data-design="catenary"] .rf-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

[data-design="catenary"] .rf-drawer {
  position: fixed; inset: 64px 0 0 0; background: var(--cat-bg);
  border-top: 1px solid var(--cat-hairline);
  overflow-y: auto;
}
[data-design="catenary"] .rf-drawer[hidden] { display: none; }
[data-design="catenary"] .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="catenary"] .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="catenary"] .rf-drawer a::before {
  content: attr(data-num); color: var(--cat-orange); font-size: .72em;
}
[data-design="catenary"] .rf-drawer__phone {
  display: flex; flex-direction: column; gap: 4px; padding-top: var(--cat-s-beam);
  border-top: 1px solid var(--cat-mist);
}
[data-design="catenary"] .rf-drawer__tel {
  font-family: var(--cat-font-mono); font-size: 20px; color: var(--cat-orange);
  text-decoration: none; letter-spacing: 0.04em;
}
[data-design="catenary"] .rf-drawer__tel-label {
  font-family: var(--cat-font-mono); font-size: 11px; color: var(--cat-stone);
  text-transform: uppercase; letter-spacing: 0.08em;
}

@media (max-width: 560px) {
  [data-design="catenary"] .rf-header__bar { padding-block: 10px; }
  [data-design="catenary"] .rf-logo__mark { font-size: 15px; }
  [data-design="catenary"] .rf-drawer { inset: 56px 0 0 0; }
}

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

/* =============================================================
   HERO — themed-movement schematic substrate
   Construction: 3 text elements + animated backdrop + CTA
   ============================================================= */

[data-design="a"] .cat-hero {
  position: relative; isolation: isolate;
  min-height: clamp(480px, 70vh, 800px);
  display: flex; align-items: center;
  background: var(--cat-bg);
  overflow: hidden;
  padding: clamp(64px, 10vh, 144px) clamp(16px, 4vw, 36px) clamp(48px, 8vh, 96px);
}

/* Hero substrate — single animated layer (ONE moving element per hero.md v0.2 rule).
   The entire SVG translates+scales as one unit (hardening rule: no fine-grid panning). */
[data-design="a"] .cat-hero__substrate {
  position: absolute; inset: 0; z-index: 0;
  pointer-events: none;
}
[data-design="a"] .cat-hero__svg {
  width: 100%; height: 100%;
  display: block;
  animation: cat-hero-breathe 12s var(--cat-ease-settle) infinite alternate;
  transform-origin: center center;
}
@keyframes cat-hero-breathe {
  0%   { transform: scale(0.97) translate(0px, 0px);   opacity: 0.55; }
  50%  { transform: scale(1.02) translate(-8px, 4px);  opacity: 0.75; }
  100% { transform: scale(0.99) translate(4px, -3px);  opacity: 0.62; }
}

/* Hero arc lines — thick enough to survive strict edge-density gate */
[data-design="a"] .cat-hero__arc {
  fill: none;
  stroke: var(--cat-orange);
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
  opacity: 0.55;
}
[data-design="a"] .cat-hero__arc--b {
  stroke: var(--cat-cyan);
  opacity: 0.35;
}
[data-design="a"] .cat-hero__dim {
  stroke: var(--cat-hairline);
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
  opacity: 0.5;
}
[data-design="a"] .cat-hero__ground {
  stroke: var(--cat-hairline);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
  opacity: 0.4;
}
[data-design="a"] .cat-hero__pin {
  fill: var(--cat-orange);
  opacity: 0.9;
}
[data-design="a"] .cat-hero__tick {
  stroke: var(--cat-hairline);
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
  opacity: 0.5;
}
[data-design="a"] .cat-hero__callout {
  font-family: var(--cat-font-mono);
  font-size: 11px;
  fill: var(--cat-graphite);
  letter-spacing: 0.06em;
  opacity: 0.7;
}
[data-design="a"] .cat-hero__callout--right { text-anchor: end; }
[data-design="a"] .cat-hero__callout--mid { text-anchor: start; }
[data-design="a"] .cat-hero__node {
  fill: var(--cat-orange);
  opacity: 0.7;
}
[data-design="a"] .cat-hero__leader {
  stroke: var(--cat-graphite);
  stroke-width: 0.8;
  vector-effect: non-scaling-stroke;
  opacity: 0.5;
}

/* Hero text content */
[data-design="a"] .cat-hero__content {
  position: relative; z-index: 1;
  max-width: 820px;
  display: flex; flex-direction: column; gap: var(--cat-s-beam);
}
[data-design="a"] .cat-hero__h1 {
  font-family: var(--cat-font-display);
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--cat-ink);
  margin: 0;
  /* Ensure opacity 1 at rest and after settle animation */
  opacity: 1;
}
[data-design="a"] .cat-hero__subtitle {
  font-family: var(--cat-font-body);
  font-size: clamp(17px, 2vw, 22px);
  color: var(--cat-graphite);
  max-width: 60ch;
  line-height: 1.5;
  margin: 0;
  opacity: 1;
}
[data-design="a"] .cat-hero__proof {
  font-family: var(--cat-font-mono);
  font-size: 13px;
  color: var(--cat-stone);
  letter-spacing: 0.06em;
  margin: 0;
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .cat-hero__svg { animation: none; opacity: 0.65; }
}

/* =============================================================
   ELEMENT 2 — Animated CTA (funnel-anchor)
   ============================================================= */

[data-design="catenary"] .rf-cta {
  display: inline-flex; align-items: center; gap: var(--cat-s-stud);
  padding: 14px 22px;
  background: var(--cat-orange); color: var(--cat-bg);
  font-family: var(--cat-font-mono); text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 13px; font-weight: 500; text-decoration: none;
  border: none; border-radius: var(--cat-r-edge);
  position: relative;
  transition:
    background-color var(--cat-d-quick) var(--cat-ease-register),
    transform var(--cat-d-quick) var(--cat-ease-register);
  animation: cat-cta-breath 4.5s var(--cat-ease-settle) infinite;
  will-change: transform;
}
[data-design="catenary"] .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="catenary"] .rf-cta:hover,
[data-design="catenary"] .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="catenary"] .rf-cta:active {
  transform: translateY(1px);
}
[data-design="catenary"] .rf-cta:active::after { opacity: 1; }

[data-design="catenary"] .rf-cta__cable {
  width: 44px; height: 16px; overflow: visible;
}
[data-design="catenary"] .rf-cta__cable-line,
[data-design="catenary"] .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="catenary"] .rf-cta:hover .rf-cta__cable-line,
[data-design="catenary"] .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); }
}

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

/* =============================================================
   ELEMENT 6 — Animated pointer (drafted-measured)
   ============================================================= */

[data-design="catenary"] .cat-pointer {
  display: flex;
  justify-content: center;
  padding: clamp(40px, 8vw, 80px) 16px clamp(56px, 10vw, 96px);
}
[data-design="catenary"] .cat-pointer__hit {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--cat-graphite);
}
[data-design="catenary"] .cat-pointer__tick {
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}
[data-design="catenary"] .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="catenary"] .cat-pointer__label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0;
  animation: cat-pointer-stamp 5s ease-in-out infinite;
  font-family: var(--cat-font-mono);
}
@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; }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="catenary"] .cat-pointer__rule,
  [data-design="catenary"] .cat-pointer__label { animation: none; opacity: 0.7; }
}

/* =============================================================
   ELEMENT 5 — Funnel (load cases)
   ============================================================= */

[data-design="catenary"] .rf-interactive {
  background: var(--cat-bg); padding-block: var(--cat-s-frame);
  border-top: 1px solid var(--cat-hairline);
}
[data-design="catenary"] .rf-funnel__head,
[data-design="catenary"] .rf-funnel,
[data-design="catenary"] .rf-funnel__beam {
  max-width: 880px; margin-inline: auto; padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="catenary"] .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="catenary"] .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="catenary"] .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="catenary"] .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: 0.06em;
  color: var(--cat-stone);
}
[data-design="catenary"] .rf-beam__ticks li {
  position: relative; padding-top: 8px; padding-left: 4px;
  border-top: 1px solid var(--cat-hairline);
}
[data-design="catenary"] .rf-beam__ticks li span { color: var(--cat-orange); margin-right: 4px; }

[data-design="catenary"] .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: 380px; overflow: hidden;
}
[data-design="catenary"] .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="catenary"] .rf-step.is-active { display: block; }
[data-design="catenary"] .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="catenary"] .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; margin-bottom: var(--cat-s-joist);
  display: block;
}
[data-design="catenary"] .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;
}

[data-design="catenary"] .rf-options {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--cat-s-stud);
  margin-bottom: var(--cat-s-beam);
}
[data-design="catenary"] .rf-options--col { grid-template-columns: 1fr; }
[data-design="catenary"] .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;
}
[data-design="catenary"] .rf-options label:hover { border-color: var(--cat-orange); }
[data-design="catenary"] .rf-options input[type="radio"] { accent-color: var(--cat-orange); }
[data-design="catenary"] .rf-options label:has(input:checked) {
  border-color: var(--cat-orange);
  background: color-mix(in oklab, var(--cat-orange), transparent 92%);
}

[data-design="catenary"] .rf-members {
  display: grid; gap: var(--cat-s-joist); margin-bottom: var(--cat-s-beam);
}
[data-design="catenary"] .rf-member {
  display: flex; flex-direction: column; gap: 6px;
}
[data-design="catenary"] .rf-member--full { grid-column: 1 / -1; }
[data-design="catenary"] .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="catenary"] .rf-member input,
[data-design="catenary"] .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="catenary"] .rf-member input:focus-visible,
[data-design="catenary"] .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%);
}

[data-design="catenary"] .rf-step__nav {
  display: flex; justify-content: space-between; gap: var(--cat-s-stud);
  margin-top: var(--cat-s-beam);
}
[data-design="catenary"] .rf-step__nav:has(.rf-tensor:only-child) { justify-content: flex-end; }
[data-design="catenary"] .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: all var(--cat-d-quick) var(--cat-ease-register);
  min-height: 44px;
}
[data-design="catenary"] .rf-tensor--primary { background: var(--cat-orange); color: var(--cat-bg); border-color: var(--cat-orange); }
[data-design="catenary"] .rf-tensor--primary:hover { background: color-mix(in oklab, var(--cat-orange), black 8%); }
[data-design="catenary"] .rf-tensor--secondary:hover { border-color: var(--cat-orange); color: var(--cat-orange); }
[data-design="catenary"] .rf-tensor:focus-visible {
  outline: none; box-shadow: 0 0 0 3px color-mix(in oklab, var(--cat-orange), transparent 70%);
}
[data-design="catenary"] .rf-tensor:active { transform: translateY(1px); }

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

[data-design="a"] .cat-funnel__below {
  max-width: 880px; margin-inline: auto; padding-inline: clamp(16px, 4vw, 36px);
  margin-top: var(--cat-s-beam); display: flex; flex-direction: column; gap: 8px;
}
[data-design="a"] .cat-funnel__compliance {
  font-family: var(--cat-font-mono); font-size: 12px; color: var(--cat-stone);
  text-transform: uppercase; letter-spacing: 0.06em;
}
[data-design="a"] .cat-funnel__alt {
  font-size: 15px; color: var(--cat-graphite);
}
[data-design="a"] .cat-funnel__alt a {
  color: var(--cat-orange); text-decoration: none;
}
[data-design="a"] .cat-funnel__alt a:hover { text-decoration: underline; }

@media (max-width: 560px) {
  [data-design="catenary"] .rf-options { grid-template-columns: 1fr; }
  [data-design="catenary"] .rf-funnel { padding: var(--cat-s-beam); min-height: 320px; }
  [data-design="catenary"] .rf-beam__ticks { font-size: 8px; }
}

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

/* =============================================================
   ELEMENT 3 — Ambient A: principal-stress isobars (services)
   ============================================================= */

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

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

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

/* =============================================================
   ELEMENT 4 — Ambient B: soap-film membrane (about)
   ============================================================= */

[data-design="catenary"] .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="catenary"] .rf-ambient-b__content {
  position: relative; z-index: 1;
  max-width: 1200px; margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="catenary"] .rf-studio {
  display: grid; grid-template-columns: 1.6fr 1fr; gap: var(--cat-s-span); align-items: start;
}
[data-design="catenary"] .rf-studio__copy {
  font-family: var(--cat-font-body); font-size: 18px; line-height: 1.6;
  color: var(--cat-graphite); max-width: 60ch;
  display: flex; flex-direction: column; gap: var(--cat-s-beam);
}
[data-design="catenary"] .rf-studio__copy p { margin: 0; }
[data-design="catenary"] .rf-data-list {
  display: flex; flex-direction: column; border-top: 1px solid var(--cat-hairline);
  margin: 0;
}
[data-design="catenary"] .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="catenary"] .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="catenary"] .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="catenary"] .rf-ambient-b__motion {
  position: absolute; inset: 0; z-index: 0; opacity: 0.18; pointer-events: none;
}
[data-design="catenary"] .rf-ambient-b__motion svg { width: 100%; height: 100%; display: block; }
[data-design="catenary"] .rf-mb {
  fill: none; stroke: var(--cat-ink); stroke-width: .75; vector-effect: non-scaling-stroke;
}
[data-design="catenary"] .rf-mb__node { fill: var(--cat-ink); }
[data-design="catenary"] .rf-mb__node--accent { fill: var(--cat-orange); }
[data-design="catenary"] .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="catenary"] .rf-studio { grid-template-columns: 1fr; gap: var(--cat-s-beam); }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="catenary"] .rf-ambient-b.is-live .rf-membrane { animation: none; }
}

/* =============================================================
   PROCESS
   ============================================================= */

[data-design="a"] .cat-process {
  padding: var(--cat-s-frame) clamp(16px, 4vw, 36px);
  max-width: 1200px; margin-inline: auto;
}
[data-design="a"] .cat-process__steps {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column;
}
[data-design="a"] .cat-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"] .cat-process__step:last-child { border-bottom: 1px solid var(--cat-hairline); }
[data-design="a"] .cat-process__num {
  font-family: var(--cat-font-mono); font-size: 26px; color: var(--cat-orange);
  letter-spacing: 0.04em; line-height: 1;
}
[data-design="a"] .cat-process__step h3 {
  font-family: var(--cat-font-display); font-size: 22px; font-weight: 500;
  margin: 0 0 8px; color: var(--cat-ink); letter-spacing: -0.01em;
}
[data-design="a"] .cat-process__step p {
  margin: 0; color: var(--cat-graphite); max-width: 60ch; line-height: 1.5;
  font-size: 16px;
}
@media (max-width: 560px) {
  [data-design="a"] .cat-process__step { grid-template-columns: 1fr; gap: var(--cat-s-stud); }
  [data-design="a"] .cat-process__num { font-size: 20px; }
}

/* =============================================================
   CONTACT
   ============================================================= */

[data-design="a"] .cat-contact {
  padding: var(--cat-s-frame) clamp(16px, 4vw, 36px);
  background: var(--cat-bg);
  max-width: 1200px; margin-inline: auto;
}
[data-design="a"] .cat-contact__grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--cat-s-span);
  margin-top: var(--cat-s-span);
}
[data-design="a"] .cat-contact__block h3 {
  font-family: var(--cat-font-mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: 0.12em; color: var(--cat-orange); margin: 0 0 var(--cat-s-beam);
}
[data-design="a"] .cat-contact__block p {
  margin: 0 0 8px; font-size: 16px; color: var(--cat-graphite);
}
[data-design="a"] .cat-contact__block a {
  color: var(--cat-orange); text-decoration: none;
}
[data-design="a"] .cat-contact__block a:hover { text-decoration: underline; }
@media (max-width: 560px) {
  [data-design="a"] .cat-contact__grid { grid-template-columns: 1fr; gap: var(--cat-s-beam); }
}

/* =============================================================
   FOOTER
   ============================================================= */

[data-design="a"] .cat-footer {
  background: var(--cat-ink); color: var(--cat-bg);
  padding: var(--cat-s-frame) clamp(16px, 4vw, 36px);
  margin-top: auto;
}
[data-design="a"] .cat-footer__beam {
  height: 1px; background: color-mix(in oklab, var(--cat-orange), transparent 60%);
  margin-bottom: var(--cat-s-span);
}
[data-design="a"] .cat-footer__inner {
  max-width: 1200px; margin-inline: auto;
  display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: var(--cat-s-span);
}
[data-design="a"] .cat-footer__firm {
  font-family: var(--cat-font-display); font-size: 18px; font-weight: 600;
  margin: 0 0 8px; color: var(--cat-bg);
}
[data-design="a"] .cat-footer__license,
[data-design="a"] .cat-footer__status {
  font-family: var(--cat-font-mono); font-size: 12px; color: color-mix(in oklab, var(--cat-bg), transparent 30%);
  margin: 0 0 4px; letter-spacing: 0.06em;
}
[data-design="a"] .cat-footer__col p { margin: 0 0 6px; font-size: 15px; }
[data-design="a"] .cat-footer__col a { color: var(--cat-orange); text-decoration: none; }
[data-design="a"] .cat-footer__col a:hover { text-decoration: underline; }
[data-design="a"] .cat-footer__hours {
  font-family: var(--cat-font-mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: 0.06em; color: color-mix(in oklab, var(--cat-bg), transparent 40%);
}
[data-design="a"] .cat-footer__col--stamp { display: flex; flex-direction: column; gap: var(--cat-s-beam); }
[data-design="a"] .cat-footer__copy {
  font-size: 12px; color: color-mix(in oklab, var(--cat-bg), transparent 40%);
  margin: 0;
}
[data-design="a"] .cat-footer__cta {
  font-family: var(--cat-font-mono); font-size: 13px; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--cat-orange); text-decoration: none;
  align-self: flex-start;
}
[data-design="a"] .cat-footer__cta:hover { text-decoration: underline; }
@media (max-width: 768px) {
  [data-design="a"] .cat-footer__inner { grid-template-columns: 1fr; gap: var(--cat-s-beam); }
}

/* =============================================================
   MOBILE OVERFLOW — defensive rules (HARD REQUIREMENT)
   ============================================================= */

[data-design="a"].dq-design,
[data-design="a"] .dq-design {
  max-width: 100%;
  overflow-x: clip;
}
[data-design="a"] * { min-width: 0; }
[data-design="a"] img,
[data-design="a"] svg:not([data-keep-size]) {
  max-width: 100%;
  height: auto;
}