/* ════════════════════════════════════════════════════════════════
   Design A — Catenary × Landis & Landis Construction
   All selectors scoped under [data-design="a"]
   CSS variables on [data-design="a"] block (not :root)
   --design-a-primary exposed for brand bar
   Keyframes prefixed ct- to avoid collision with Design B
   ════════════════════════════════════════════════════════════════ */

/* ─── DESIGN TOKENS ──────────────────────────────────────────── */
[data-design="a"] {
  /* Color tokens (catenary palette — vellum + ink + Aicher orange) */
  --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;

  /* Design-A primary (brand bar readable token) */
  --design-a-primary: #E9601F;

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

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

  /* Motion */
  --cat-d-quick:  140ms;
  --cat-d-base:   220ms;
  --cat-d-settle: 520ms;
  --cat-d-span:   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);

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

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

  /* Base */
  background: var(--cat-bg);
  color: var(--cat-ink);
  font-family: var(--cat-font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  max-width: 100%;
  overflow-x: clip;
}

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

[data-design="a"] a { color: inherit; }
[data-design="a"] p { margin: 0 0 var(--cat-s-stud); }
[data-design="a"] p:last-child { margin-bottom: 0; }
[data-design="a"] h1, [data-design="a"] h2, [data-design="a"] h3 { margin: 0; }
[data-design="a"] address { font-style: normal; }
[data-design="a"] ul { list-style: none; margin: 0; padding: 0; }
[data-design="a"] fieldset { border: 0; padding: 0; margin: 0; }


/* ─── SHARED TYPOGRAPHIC COMPONENTS ─────────────────────────── */
[data-design="a"] .ct-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"] .ct-section-h {
  font-family: var(--cat-font-display);
  font-size: clamp(30px, 5.5vw, 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: 24ch;
}

[data-design="a"] .ct-mono {
  font-family: var(--cat-font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
}

[data-design="a"] .ct-link {
  color: var(--cat-orange);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklab, var(--cat-orange), transparent 60%);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--cat-d-quick) linear;
}
[data-design="a"] .ct-link:hover { text-decoration-color: var(--cat-orange); }


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

/* Atmospheric chain layer */
[data-design="a"] .ct-chain {
  position: absolute;
  inset: 0 0 auto 0;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}
[data-design="a"] .ct-chain svg { width: 100%; height: 100%; display: block; }
[data-design="a"] .ct-chain__curve {
  fill: none;
  stroke: var(--cat-hairline);
  stroke-width: 0.75;
  vector-effect: non-scaling-stroke;
  transform-origin: 50% 0%;
  transform-box: fill-box;
  animation: ct-chain-settle var(--cat-d-span) var(--cat-ease-settle) infinite alternate;
}
[data-design="a"] .ct-chain__curve--2 {
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 40%);
  animation-duration: 22s;
  animation-delay: -7s;
}
[data-design="a"] .ct-chain__curve--3 {
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 62%);
  animation-duration: 31s;
  animation-delay: -13s;
}
[data-design="a"] .ct-chain__pin { fill: var(--cat-orange); }

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

/* Header bar */
[data-design="a"] .ct-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;
}

/* Logo */
[data-design="a"] .ct-logo {
  text-decoration: none;
  color: var(--cat-ink);
  display: flex;
  flex-direction: column;
  gap: 1px;
}
[data-design="a"] .ct-logo__mark {
  font-family: var(--cat-font-display);
  font-size: clamp(15px, 2.4vw, 18px);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.15;
}
[data-design="a"] .ct-logo__sub {
  font-family: var(--cat-font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cat-stone);
}

/* Hamburger button */
[data-design="a"] .ct-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);
  flex-shrink: 0;
  transition: border-color var(--cat-d-quick) var(--cat-ease-register);
}
[data-design="a"] .ct-burger:hover { border-color: var(--cat-orange); }
[data-design="a"] .ct-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"] .ct-burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
[data-design="a"] .ct-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
[data-design="a"] .ct-burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Navigation drawer */
[data-design="a"] .ct-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"] .ct-drawer[hidden] { display: none; }
[data-design="a"] .ct-drawer__inner {
  max-width: 1440px;
  margin-inline: auto;
  padding: var(--cat-s-span) clamp(16px, 4vw, 36px) var(--cat-s-frame);
  display: flex;
  flex-direction: column;
  gap: var(--cat-s-stud);
}
[data-design="a"] .ct-drawer a {
  font-family: var(--cat-font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: clamp(18px, 3.6vw, 28px);
  color: var(--cat-ink);
  text-decoration: none;
  padding: var(--cat-s-stud) 0;
  border-bottom: 1px solid var(--cat-mist);
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--cat-s-beam);
  align-items: baseline;
  min-height: 44px;
}
[data-design="a"] .ct-drawer a::before {
  content: attr(data-num);
  color: var(--cat-orange);
  font-size: 0.72em;
}
[data-design="a"] .ct-drawer a:hover { color: var(--cat-orange); }

/* Drawer phone / contact block */
[data-design="a"] .ct-drawer__contacts {
  padding-top: var(--cat-s-beam);
}
[data-design="a"] .ct-drawer__phone {
  font-family: var(--cat-font-mono);
  font-size: clamp(18px, 3vw, 24px);
  letter-spacing: 0.06em;
  color: var(--cat-ink);
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: var(--cat-s-joist);
}
[data-design="a"] .ct-drawer__phone:hover { color: var(--cat-orange); }
[data-design="a"] .ct-drawer__phone-label {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cat-stone);
  text-transform: uppercase;
}

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


/* ─── HERO ───────────────────────────────────────────────────── */
[data-design="a"] .ct-hero {
  position: relative;
  min-height: clamp(480px, 82vh, 820px);
  display: flex;
  align-items: center;
  background: var(--cat-bg);
  overflow: hidden;
}

/* HERO BACKDROP — structural diagram animated layer */
[data-design="a"] .ct-hero__backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
[data-design="a"] .ct-diagram {
  width: 100%;
  height: 100%;
  display: block;
}

/* All diagram elements start invisible (stroke-dasharray trick) */
[data-design="a"] .ct-diag {
  fill: none;
  stroke: color-mix(in oklab, var(--cat-ink), transparent 72%);
  stroke-width: 0.8;
  vector-effect: non-scaling-stroke;
  stroke-dasharray: 2000;
  stroke-dashoffset: 2000;
  animation: ct-diag-draw var(--d-dur, 0.9s) var(--cat-ease-unfurl) both;
  animation-delay: var(--d-delay, 0s);
  opacity: 0;
}
[data-design="a"] .ct-diag--chord {
  stroke-width: 1.4;
  stroke: color-mix(in oklab, var(--cat-ink), transparent 58%);
  stroke-dasharray: 3000;
  stroke-dashoffset: 3000;
  --d-dur: 1.5s;
}
[data-design="a"] .ct-diag--vert {
  stroke: color-mix(in oklab, var(--cat-ink), transparent 62%);
  stroke-dasharray: 300;
  stroke-dashoffset: 300;
  --d-dur: 0.5s;
}
[data-design="a"] .ct-diag--brace {
  stroke: color-mix(in oklab, var(--cat-ink), transparent 74%);
  stroke-dasharray: 500;
  stroke-dashoffset: 500;
  --d-dur: 0.6s;
}
[data-design="a"] .ct-diag--dim {
  stroke: color-mix(in oklab, var(--cat-orange), transparent 52%);
  stroke-dasharray: 2000;
  stroke-dashoffset: 2000;
  stroke-width: 0.6;
  --d-dur: 0.8s;
}
[data-design="a"] .ct-diag--tick {
  stroke: var(--cat-orange);
  stroke-width: 1;
  stroke-dasharray: 30;
  stroke-dashoffset: 30;
  --d-dur: 0.3s;
}
[data-design="a"] .ct-diag--load {
  stroke: color-mix(in oklab, var(--cat-orange), transparent 65%);
  stroke-dasharray: 120;
  stroke-dashoffset: 120;
  --d-dur: 0.4s;
}
[data-design="a"] .ct-diag--node {
  fill: color-mix(in oklab, var(--cat-ink), transparent 52%);
  stroke: none;
  stroke-dasharray: none;
  stroke-dashoffset: unset;
  animation: ct-diag-node-pop var(--d-dur, 0.3s) var(--cat-ease-settle) both;
  animation-delay: var(--d-delay, 0s);
}
[data-design="a"] .ct-diag--node-accent { fill: var(--cat-orange) !important; }

[data-design="a"] .ct-diag__label {
  font-family: var(--cat-font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  fill: color-mix(in oklab, var(--cat-orange), transparent 38%);
  opacity: 0;
  animation: ct-diag-label-fade 0.6s var(--cat-ease-unfurl) both;
  animation-delay: var(--d-delay, 0s);
}
[data-design="a"] .ct-diag__callout {
  font-family: var(--cat-font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  fill: color-mix(in oklab, var(--cat-ink), transparent 55%);
  opacity: 0;
  animation: ct-diag-label-fade 0.5s var(--cat-ease-unfurl) both;
  animation-delay: var(--d-delay, 0s);
}

/* After draw-in: settle into quiet breath */
[data-design="a"] .ct-diagram {
  animation: ct-diag-breathe 9s var(--cat-ease-settle) 2.2s infinite alternate;
}

@keyframes ct-diag-draw {
  0%   { stroke-dashoffset: var(--d-start, 2000); opacity: 0.28; }
  15%  { opacity: 0.36; }
  100% { stroke-dashoffset: 0; opacity: 1; }
}
@keyframes ct-diag-node-pop {
  0%   { transform: scale(0); opacity: 0; }
  70%  { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes ct-diag-label-fade {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes ct-diag-breathe {
  0%   { opacity: 1; }
  50%  { opacity: 0.82; }
  100% { opacity: 0.94; }
}

/* Hero content (text layer, z-index above backdrop) */
[data-design="a"] .ct-hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: min(760px, 100%);
  padding: clamp(64px, 10vh, 120px) clamp(20px, 5vw, 60px) clamp(64px, 10vh, 120px) clamp(20px, 8vw, 100px);
}

[data-design="a"] .ct-hero__headline {
  font-family: var(--cat-font-display);
  font-size: clamp(28px, 5.2vw, 64px);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.06;
  color: var(--cat-ink);
  margin: 0 0 var(--cat-s-beam);
  max-width: 18ch;
  overflow-wrap: anywhere;
}

[data-design="a"] .ct-hero__subtitle {
  font-family: var(--cat-font-body);
  font-size: clamp(16px, 2.2vw, 20px);
  line-height: 1.5;
  color: var(--cat-graphite);
  margin: 0 0 var(--cat-s-stud);
  max-width: 46ch;
  overflow-wrap: anywhere;
}

[data-design="a"] .ct-hero__proof {
  font-family: var(--cat-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cat-stone);
  margin: 0 0 var(--cat-s-span);
  overflow-wrap: anywhere;
}

/* ELEMENT 2 — Animated CTA (funnel anchor, in hero) */
[data-design="a"] .ct-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);
  cursor: pointer;
  position: relative;
  transition: background-color var(--cat-d-quick) var(--cat-ease-register),
              transform var(--cat-d-quick) var(--cat-ease-register);
  animation: ct-cta-breath 4.5s var(--cat-ease-settle) infinite;
  will-change: transform;
  min-height: 44px;
  /* Ensure tappable on mobile */
}
[data-design="a"] .ct-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"] .ct-cta:hover,
[data-design="a"] .ct-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"] .ct-cta:active { transform: translateY(1px); }
[data-design="a"] .ct-cta:active::after { opacity: 1; }

[data-design="a"] .ct-cta__cable {
  width: 40px;
  height: 16px;
  overflow: visible;
  flex-shrink: 0;
}
[data-design="a"] .ct-cta__cable-line,
[data-design="a"] .ct-cta__cable-head {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--cat-d-base) var(--cat-ease-unfurl);
}
[data-design="a"] .ct-cta:hover .ct-cta__cable-line,
[data-design="a"] .ct-cta:focus-visible .ct-cta__cable-line {
  transform: translateY(-2px);
}

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

/* Footer CTA variant (smaller, same grammar) */
[data-design="a"] .ct-cta--footer {
  font-size: 12px;
  padding: 12px 18px;
}


/* ─── ELEMENT 6 — POINTER ─────────────────────────────────────── */
[data-design="a"] .ct-pointer {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: clamp(40px, 6vw, 72px) 16px clamp(48px, 8vw, 88px);
  background: var(--cat-bg);
  color: var(--cat-graphite);
}
[data-design="a"] .ct-pointer__assembly {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
[data-design="a"] .ct-pointer__tick {
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
  opacity: 0.65;
}
[data-design="a"] .ct-pointer__rule {
  display: block;
  width: 1px;
  height: clamp(40px, 6vw, 64px);
  background: currentColor;
  transform-origin: top center;
  animation: ct-pointer-extend 5s ease-in-out infinite;
}
[data-design="a"] .ct-pointer__label {
  font-family: var(--cat-font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0;
  animation: ct-pointer-stamp 5s ease-in-out infinite;
}
@keyframes ct-pointer-extend {
  0%, 100% { transform: scaleY(0.35); opacity: 0.35; }
  50%      { transform: scaleY(1);    opacity: 0.80; }
}
@keyframes ct-pointer-stamp {
  0%, 28%, 100% { opacity: 0; }
  48%, 72%      { opacity: 0.80; }
}


/* ─── ELEMENT 5 — FUNNEL ──────────────────────────────────────── */
[data-design="a"] .ct-interactive {
  background: var(--cat-bg);
  padding-block: var(--cat-s-frame);
  border-top: 1px solid var(--cat-hairline);
}

[data-design="a"] .ct-funnel__head,
[data-design="a"] .ct-funnel,
[data-design="a"] .ct-funnel__beam {
  max-width: 880px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}

[data-design="a"] .ct-funnel__sub {
  font-family: var(--cat-font-body);
  font-size: 18px;
  color: var(--cat-graphite);
  margin: 0 0 var(--cat-s-span);
  max-width: 56ch;
  line-height: 1.55;
}

/* Progress beam */
[data-design="a"] .ct-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"] .ct-beam__fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0%;
  background: var(--cat-orange);
  transition: width var(--cat-d-settle) var(--cat-ease-settle);
  border-radius: var(--cat-r-edge);
}
[data-design="a"] .ct-beam__ticks {
  position: absolute;
  inset: 16px 0 auto 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--cat-font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cat-stone);
}
[data-design="a"] .ct-beam__ticks li {
  position: relative;
  padding-top: 8px;
  padding-left: 6px;
  border-top: 1px solid var(--cat-hairline);
}
[data-design="a"] .ct-beam__ticks li span {
  color: var(--cat-orange);
  margin-right: 4px;
}

/* Funnel form panel */
[data-design="a"] .ct-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;
}

/* Steps */
[data-design="a"] .ct-step {
  border: 0;
  padding: 0;
  margin: 0;
  display: none;
  animation: ct-step-unfurl var(--cat-d-settle) var(--cat-ease-unfurl) both;
}
[data-design="a"] .ct-step.is-active { display: block; }
[data-design="a"] .ct-step.is-leaving {
  display: block;
  animation: ct-step-settle var(--cat-d-settle) var(--cat-ease-settle) both;
}

@keyframes ct-step-unfurl {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes ct-step-settle {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(14px); }
}

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

/* Radio option chips */
[data-design="a"] .ct-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--cat-s-stud);
  margin-bottom: var(--cat-s-beam);
}
[data-design="a"] .ct-options--col { grid-template-columns: 1fr; }
[data-design="a"] .ct-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"] .ct-options label:hover { border-color: var(--cat-orange); }
[data-design="a"] .ct-options input[type="radio"] { accent-color: var(--cat-orange); }
[data-design="a"] .ct-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"] .ct-members {
  display: grid;
  gap: var(--cat-s-joist);
  margin-bottom: var(--cat-s-beam);
}
[data-design="a"] .ct-members {
  grid-template-columns: 1fr 1fr;
}
[data-design="a"] .ct-member {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
[data-design="a"] .ct-member--full {
  grid-column: 1 / -1;
}
[data-design="a"] .ct-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"] .ct-required {
  color: var(--cat-orange);
  font-style: normal;
  margin-left: 2px;
}
[data-design="a"] .ct-member input,
[data-design="a"] .ct-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;
  width: 100%;
  resize: vertical;
  transition: border-color var(--cat-d-quick) var(--cat-ease-register),
              box-shadow var(--cat-d-quick) linear;
}
[data-design="a"] .ct-member input:focus-visible,
[data-design="a"] .ct-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="a"] .ct-form__note {
  font-family: var(--cat-font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cat-stone);
  margin-bottom: var(--cat-s-stud);
}

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

[data-design="a"] .ct-tensor {
  font-family: var(--cat-font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  padding: 12px 20px;
  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;
  min-width: 80px;
}
[data-design="a"] .ct-tensor--primary {
  background: var(--cat-orange);
  color: var(--cat-bg);
  border-color: var(--cat-orange);
}
[data-design="a"] .ct-tensor--primary:hover {
  background: color-mix(in oklab, var(--cat-orange), black 8%);
}
[data-design="a"] .ct-tensor--secondary:hover {
  border-color: var(--cat-orange);
  color: var(--cat-orange);
}
[data-design="a"] .ct-tensor:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--cat-orange), transparent 70%);
}
[data-design="a"] .ct-tensor:active { transform: translateY(1px); }

/* Confirmation state */
[data-design="a"] .ct-step__confirm {
  font-size: 17px;
  color: var(--cat-graphite);
  line-height: 1.55;
  margin-top: var(--cat-s-stud);
}
[data-design="a"] .ct-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"] .ct-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"] .ct-summary dd {
  font-family: var(--cat-font-mono);
  font-size: 14px;
  color: var(--cat-ink);
  margin: 0;
}

/* Below-funnel trust strip */
[data-design="a"] .ct-funnel__footer {
  max-width: 880px;
  margin: var(--cat-s-span) auto 0;
  padding-inline: clamp(16px, 4vw, 36px);
  border-top: 1px solid var(--cat-mist);
  padding-top: var(--cat-s-beam);
  display: flex;
  flex-direction: column;
  gap: var(--cat-s-stud);
}
[data-design="a"] .ct-funnel__footer-line {
  font-family: var(--cat-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cat-stone);
  margin: 0;
  line-height: 1.5;
}

@media (max-width: 560px) {
  [data-design="a"] .ct-options { grid-template-columns: 1fr; }
  [data-design="a"] .ct-funnel { padding: var(--cat-s-beam); min-height: 300px; }
  [data-design="a"] .ct-beam__ticks { font-size: 8px; }
  [data-design="a"] .ct-members { grid-template-columns: 1fr; }
}


/* ─── REPEATED FUNNEL CTA ────────────────────────────────────── */
[data-design="a"] .ct-cta-repeat {
  background: var(--cat-bg);
  border-top: 1px solid var(--cat-mist);
  padding: var(--cat-s-frame) clamp(20px, 5vw, 60px);
  display: flex;
  align-items: center;
  gap: var(--cat-s-span);
  max-width: 1200px;
  margin-inline: auto;
  flex-wrap: wrap;
}
[data-design="a"] .ct-cta-repeat__prompt {
  font-family: var(--cat-font-display);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--cat-ink);
  margin: 0;
  flex: 1 1 200px;
}


/* ─── ELEMENT 3 — CAPABILITIES (ambient isobars) ─────────────── */
[data-design="a"] .ct-ambient-a {
  position: relative;
  isolation: isolate;
  padding-block: var(--cat-s-frame);
  background: var(--cat-bg);
  overflow: hidden;
  border-top: 1px solid var(--cat-mist);
}
[data-design="a"] .ct-ambient-a__motion {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.32;
  pointer-events: none;
}
[data-design="a"] .ct-ambient-a__motion svg { width: 100%; height: 100%; display: block; }
[data-design="a"] .ct-isobar {
  fill: none;
  stroke: var(--cat-cyan);
  stroke-width: 0.9;
  vector-effect: non-scaling-stroke;
  stroke-dasharray: 4 6;
  animation: ct-isobar-flow 16s linear infinite;
  animation-delay: calc(var(--i, 0) * -2.4s);
  animation-play-state: paused;
}
[data-design="a"] .ct-ambient-a.is-live .ct-isobar {
  animation-play-state: running;
}
@keyframes ct-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"] .ct-ambient-a__content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}

/* Methods list (Capabilities) */
[data-design="a"] .ct-methods {
  display: flex;
  flex-direction: column;
}
[data-design="a"] .ct-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-top-color var(--cat-d-base) var(--cat-ease-register);
}
[data-design="a"] .ct-method:last-child {
  border-bottom: 1px solid var(--cat-hairline);
}
[data-design="a"] .ct-method:hover {
  border-top-color: var(--cat-orange);
}
[data-design="a"] .ct-method__num {
  font-family: var(--cat-font-mono);
  color: var(--cat-orange);
  font-size: 26px;
  letter-spacing: 0.04em;
  padding-top: 4px;
}
[data-design="a"] .ct-method__body h3 {
  font-family: var(--cat-font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 500;
  margin: 0 0 var(--cat-s-stud);
  color: var(--cat-ink);
  letter-spacing: -0.01em;
}
[data-design="a"] .ct-method__body p {
  margin: 0;
  color: var(--cat-graphite);
  max-width: 62ch;
  line-height: 1.6;
  font-size: 17px;
}

@media (max-width: 768px) {
  [data-design="a"] .ct-method {
    grid-template-columns: 1fr;
    gap: var(--cat-s-stud);
  }
  [data-design="a"] .ct-method__num { font-size: 20px; }
}


/* ─── ELEMENT 4 — PROCESS (soap-film membrane) ───────────────── */
[data-design="a"] .ct-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"] .ct-ambient-b__motion {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.16;
  pointer-events: none;
}
[data-design="a"] .ct-ambient-b__motion svg { width: 100%; height: 100%; display: block; }
[data-design="a"] .ct-mb {
  fill: none;
  stroke: var(--cat-ink);
  stroke-width: 0.75;
  vector-effect: non-scaling-stroke;
}
[data-design="a"] .ct-mb__node { fill: var(--cat-ink); }
[data-design="a"] .ct-mb__node--accent { fill: var(--cat-orange); }
[data-design="a"] .ct-ambient-b.is-live .ct-membrane {
  animation: ct-membrane-breathe 20s var(--cat-ease-settle) infinite alternate;
  transform-origin: center;
}
@keyframes ct-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); }
}

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

/* Process grid */
[data-design="a"] .ct-process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: var(--cat-s-span) var(--cat-s-beam);
  margin-bottom: var(--cat-s-span);
}
[data-design="a"] .ct-process-step {
  border-top: 1px solid var(--cat-hairline);
  padding-top: var(--cat-s-beam);
}
[data-design="a"] .ct-process-step__num {
  font-family: var(--cat-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cat-orange);
  display: block;
  margin-bottom: var(--cat-s-stud);
}
[data-design="a"] .ct-process-step h3 {
  font-family: var(--cat-font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--cat-ink);
  margin: 0 0 var(--cat-s-stud);
}
[data-design="a"] .ct-process-step p {
  font-size: 16px;
  color: var(--cat-graphite);
  line-height: 1.6;
  margin: 0;
  max-width: 52ch;
}

/* Data list (firm facts panel) */
[data-design="a"] .ct-studio__data {
  border-top: 1px solid var(--cat-hairline);
  padding-top: var(--cat-s-beam);
  max-width: 480px;
}
[data-design="a"] .ct-data-list {
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
}
[data-design="a"] .ct-data-list > div {
  display: grid;
  grid-template-columns: 1fr auto;
  padding: var(--cat-s-stud) 0;
  border-bottom: 1px solid var(--cat-mist);
  gap: var(--cat-s-beam);
  align-items: baseline;
}
[data-design="a"] .ct-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"] .ct-data-list dd {
  font-family: var(--cat-font-mono);
  font-size: 14px;
  color: var(--cat-ink);
  margin: 0;
  font-variant-numeric: tabular-nums;
  text-align: right;
}


/* ─── ABOUT ──────────────────────────────────────────────────── */
[data-design="a"] .ct-about {
  background: var(--cat-bg);
  padding-block: var(--cat-s-frame);
  border-top: 1px solid var(--cat-mist);
}
[data-design="a"] .ct-about__content {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="a"] .ct-about__body {
  max-width: 68ch;
  margin-bottom: var(--cat-s-span);
}
[data-design="a"] .ct-about__body p {
  font-size: 18px;
  line-height: 1.65;
  color: var(--cat-graphite);
  margin-bottom: var(--cat-s-beam);
}
[data-design="a"] .ct-about__body p:last-child { margin-bottom: 0; }

[data-design="a"] .ct-about__quote {
  margin: 0;
  border-left: 2px solid var(--cat-orange);
  padding: var(--cat-s-beam) var(--cat-s-span);
  background: var(--cat-surface);
  border-radius: 0 var(--cat-r-edge) var(--cat-r-edge) 0;
  max-width: 68ch;
}
[data-design="a"] .ct-about__quote p {
  font-family: var(--cat-font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--cat-ink);
  line-height: 1.4;
  margin: 0 0 var(--cat-s-stud);
}
[data-design="a"] .ct-about__quote cite {
  font-family: var(--cat-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cat-stone);
  font-style: normal;
}


/* ─── SERVICE AREA ───────────────────────────────────────────── */
[data-design="a"] .ct-service-area {
  background: var(--cat-surface);
  padding-block: var(--cat-s-frame);
  border-top: 1px solid var(--cat-mist);
}
[data-design="a"] .ct-service-area__content {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}
[data-design="a"] .ct-area-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(240px, 100%), 1fr));
  gap: var(--cat-s-span) var(--cat-s-beam);
}
[data-design="a"] .ct-area-col {
  border-top: 1px solid var(--cat-hairline);
  padding-top: var(--cat-s-beam);
}
[data-design="a"] .ct-area-col__head {
  font-family: var(--cat-font-display);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--cat-ink);
  margin: 0 0 var(--cat-s-beam);
}
[data-design="a"] .ct-area-list {
  display: flex;
  flex-direction: column;
  gap: var(--cat-s-stud);
  margin-bottom: var(--cat-s-beam);
}
[data-design="a"] .ct-area-list li {
  font-size: 16px;
  color: var(--cat-graphite);
  line-height: 1.4;
  padding-left: 14px;
  position: relative;
}
[data-design="a"] .ct-area-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--cat-orange);
  font-family: var(--cat-font-mono);
  font-size: 12px;
  top: 3px;
}
[data-design="a"] .ct-area-license {
  font-size: 13px;
  color: var(--cat-stone);
  margin: 0;
}
[data-design="a"] .ct-area-address {
  font-size: 16px;
  color: var(--cat-graphite);
  line-height: 1.6;
  margin-bottom: var(--cat-s-stud);
}
[data-design="a"] .ct-area-phone {
  font-family: var(--cat-font-mono);
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--cat-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--cat-mist);
  transition: color var(--cat-d-quick) linear,
              border-color var(--cat-d-quick) linear;
  display: inline-block;
  min-height: 44px;
  line-height: 44px;
}
[data-design="a"] .ct-area-phone:hover {
  color: var(--cat-orange);
  border-color: var(--cat-orange);
}


/* ─── FOOTER / IMPRINT ───────────────────────────────────────── */
[data-design="a"] .ct-footer {
  background: var(--cat-ink);
  color: var(--cat-bg);
  padding-block: var(--cat-s-frame);
  border-top: 2px solid var(--cat-orange);
}

/* Load-bearing beam line at top of footer */
[data-design="a"] .ct-footer__beam {
  height: 1px;
  background: color-mix(in oklab, var(--cat-bg), transparent 80%);
  margin-bottom: var(--cat-s-span);
  max-width: 1200px;
  margin-inline: auto;
  margin-inline: auto;
  display: block;
}

[data-design="a"] .ct-footer__grid {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(220px, 100%), 1fr));
  gap: var(--cat-s-span) var(--cat-s-beam);
}

[data-design="a"] .ct-footer__col {
  display: flex;
  flex-direction: column;
  gap: var(--cat-s-stud);
}

[data-design="a"] .ct-footer__firm {
  font-family: var(--cat-font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--cat-bg);
  margin: 0;
}
[data-design="a"] .ct-footer__license {
  margin: 0;
  line-height: 1.6;
}
[data-design="a"] .ct-footer__license .ct-mono {
  color: color-mix(in oklab, var(--cat-bg), transparent 25%);
  display: block;
}
[data-design="a"] .ct-footer__states {
  font-size: 14px;
  color: color-mix(in oklab, var(--cat-bg), transparent 35%);
  line-height: 1.5;
  margin: 0;
}

[data-design="a"] .ct-footer__col-head {
  font-family: var(--cat-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cat-orange);
  margin: 0;
}
[data-design="a"] .ct-footer__address {
  font-size: 15px;
  color: color-mix(in oklab, var(--cat-bg), transparent 25%);
  line-height: 1.6;
}
[data-design="a"] .ct-footer__phone {
  font-family: var(--cat-font-mono);
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--cat-bg);
  text-decoration: none;
  transition: color var(--cat-d-quick) linear;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
[data-design="a"] .ct-footer__phone:hover { color: var(--cat-orange); }

/* Footer CTA (Element 2 instance) */
[data-design="a"] .ct-footer .ct-cta {
  align-self: flex-start;
}
[data-design="a"] .ct-footer__copy {
  font-family: var(--cat-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: color-mix(in oklab, var(--cat-bg), transparent 45%);
  margin: auto 0 0;
  padding-top: var(--cat-s-beam);
}
[data-design="a"] .ct-footer__area {
  font-family: var(--cat-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: color-mix(in oklab, var(--cat-bg), transparent 55%);
  margin: 0;
}

/* Footer signature stamp */
[data-design="a"] .ct-footer__stamp {
  max-width: 1200px;
  margin: var(--cat-s-span) auto 0;
  padding-inline: clamp(16px, 4vw, 36px);
  border-top: 1px solid color-mix(in oklab, var(--cat-bg), transparent 80%);
  padding-top: var(--cat-s-beam);
}
[data-design="a"] .ct-footer__stamp .ct-mono {
  color: color-mix(in oklab, var(--cat-bg), transparent 60%);
  font-size: 11px;
}


/* ─── REDUCED MOTION OVERRIDES ───────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  /* Header chain */
  [data-design="a"] .ct-chain__curve { animation: none; }
  [data-design="a"] .ct-burger span  { transition: none; }

  /* Hero backdrop: show at settled opacity, no animation */
  [data-design="a"] .ct-diag {
    animation: none;
    stroke-dashoffset: 0;
    opacity: 0.38;
  }
  [data-design="a"] .ct-diag--node,
  [data-design="a"] .ct-diag__label,
  [data-design="a"] .ct-diag__callout {
    animation: none;
    opacity: 1;
    transform: none;
  }
  [data-design="a"] .ct-diagram { animation: none; }

  /* Pointer */
  [data-design="a"] .ct-pointer__rule  { animation: none; opacity: 0.65; transform: none; }
  [data-design="a"] .ct-pointer__label { animation: none; opacity: 0.65; }

  /* CTA breath */
  [data-design="a"] .ct-cta            { animation: none; }
  [data-design="a"] .ct-cta__cable-line,
  [data-design="a"] .ct-cta__cable-head { transition: none; }

  /* Isobars */
  [data-design="a"] .ct-isobar { animation: none; transform: none; }

  /* Membrane */
  [data-design="a"] .ct-ambient-b.is-live .ct-membrane { animation: none; }

  /* Funnel steps */
  [data-design="a"] .ct-step,
  [data-design="a"] .ct-step.is-leaving { animation: none; }
  [data-design="a"] .ct-beam__fill      { transition: none; }
}


/* ─── MOBILE / OVERFLOW GUARD (MANDATORY BLOCK) ─────────────── */
[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; }