/* ═══════════════════════════════════════════════════
   Design-B · Catenary — West Coast Remodeling LLC
   ALL rules scoped to [data-design="b"] or @media/@keyframes/:root
   ZERO bare/global selectors
═══════════════════════════════════════════════════ */

/* ─── Token system ─────────────────────────────── */
:root {
  --design-b-primary:   #E9601F;

  --cat-bg:         #F2EFE7;
  --cat-surface:    #FAF8F3;
  --cat-ink:        #1A1816;
  --cat-graphite:   #44413C;
  --cat-stone:      #6B6760;
  --cat-hairline:   #4A4742;
  --cat-mist:       #D7D2C6;
  --cat-orange:     #E9601F;
  --cat-cyan:       #5C8AA8;

  --cat-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-ring: inset 0 0 0 1px var(--cat-hairline);
}

/* ─── Base reset scoped to design-b ─────────────── */
[data-design="b"].dq-design,
[data-design="b"] .dq-design {
  box-sizing: border-box;
  font-family: var(--cat-font-body);
  background: var(--cat-bg);
  color: var(--cat-ink);
  line-height: 1.5;
}

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

[data-design="b"] .rf-chain {
  position: absolute;
  inset: 0 0 auto 0;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

[data-design="b"] .rf-chain svg {
  width: 100%;
  height: 100%;
  display: block;
}

[data-design="b"] .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="b"] .rf-chain__curve--2 {
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 35%);
  animation-duration: 22s;
  animation-delay: -6s;
}

[data-design="b"] .rf-chain__curve--3 {
  stroke: color-mix(in oklab, var(--cat-hairline), transparent 60%);
  animation-duration: 31s;
  animation-delay: -12s;
}

[data-design="b"] .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="b"] .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="b"] .rf-logo {
  text-decoration: none;
  color: var(--cat-ink);
}

[data-design="b"] .rf-logo__mark {
  font-family: var(--cat-font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

[data-design="b"] .rf-burger {
  background: transparent;
  border: 1px solid var(--cat-hairline);
  width: 44px;
  height: 44px;
  padding: 0;
  cursor: pointer;
  display: grid;
  place-content: center;
  gap: 5px;
  border-radius: var(--cat-r-edge);
  transition: border-color var(--cat-d-quick) var(--cat-ease-register);
}

[data-design="b"] .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="b"] .rf-burger:hover {
  border-color: var(--cat-orange);
}

[data-design="b"] .rf-burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

[data-design="b"] .rf-burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

[data-design="b"] .rf-burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Drawer */
[data-design="b"] .rf-drawer {
  position: fixed;
  inset: 64px 0 0 0;
  background: var(--cat-bg);
  border-top: 1px solid var(--cat-hairline);
  z-index: 39;
  overflow-y: auto;
}

[data-design="b"] .rf-drawer[hidden] {
  display: none;
}

[data-design="b"] .rf-drawer__close {
  position: absolute;
  top: 16px;
  right: clamp(16px, 4vw, 36px);
  background: transparent;
  border: 1px solid var(--cat-hairline);
  width: 44px;
  height: 44px;
  cursor: pointer;
  font-size: 16px;
  color: var(--cat-ink);
  border-radius: var(--cat-r-edge);
  display: grid;
  place-content: center;
  transition: border-color var(--cat-d-quick) var(--cat-ease-register);
}

[data-design="b"] .rf-drawer__close:hover {
  border-color: var(--cat-orange);
}

[data-design="b"] .rf-drawer__inner {
  max-width: 1440px;
  margin-inline: auto;
  padding: var(--cat-s-frame) clamp(16px, 4vw, 36px);
  padding-top: 56px;
  display: flex;
  flex-direction: column;
  gap: var(--cat-s-beam);
}

[data-design="b"] .rf-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: 56px 1fr;
  gap: var(--cat-s-beam);
  align-items: baseline;
  min-height: 44px;
}

[data-design="b"] .rf-drawer a::before {
  content: attr(data-num);
  color: var(--cat-orange);
  font-size: .72em;
}

[data-design="b"] .rf-drawer__phone {
  color: var(--cat-orange) !important;
}

[data-design="b"] .rf-drawer__backdrop {
  position: fixed;
  inset: 0;
  background: color-mix(in oklab, var(--cat-ink), transparent 60%);
  z-index: 38;
}

[data-design="b"] .rf-drawer__backdrop[hidden] {
  display: none;
}

/* ─── HERO ─────────────────────────────────────── */
[data-design="b"] .rf-hero {
  position: relative;
  min-height: clamp(520px, 72vh, 820px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

[data-design="b"] .rf-hero__backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* E3: Ken-Burns — ONE animated layer, arrival + sustained ambient */
[data-design="b"] .rf-hero__kb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  animation: cat-hero-kb 18s var(--cat-ease-settle) infinite alternate;
  will-change: transform;
}

@keyframes cat-hero-kb {
  0%   { transform: scale(1.00) translate(0%, 0%); }
  50%  { transform: scale(1.04) translate(-1.2%, 0.5%); }
  100% { transform: scale(1.02) translate(0.8%, -0.5%); }
}

[data-design="b"] .rf-hero__wash {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    color-mix(in oklab, var(--cat-bg), transparent 10%) 0%,
    color-mix(in oklab, var(--cat-bg), transparent 40%) 40%,
    color-mix(in oklab, var(--cat-ink), transparent 72%) 100%
  );
}

/* Structural diagram SVG annotations */
[data-design="b"] .rf-hero__diagram {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

[data-design="b"] .rf-diag__line {
  stroke: var(--cat-orange);
  stroke-width: .6;
  vector-effect: non-scaling-stroke;
  opacity: 0.55;
  animation: cat-diag-appear 3.5s var(--cat-ease-unfurl) forwards;
  stroke-dasharray: 200;
  stroke-dashoffset: 200;
}

[data-design="b"] .rf-diag__line--v {
  animation-delay: 0.3s;
}

[data-design="b"] .rf-diag__line--h:first-child {
  animation-delay: 0s;
}

@keyframes cat-diag-appear {
  to { stroke-dashoffset: 0; }
}

[data-design="b"] .rf-diag__dim {
  font-family: var(--cat-font-mono);
  font-size: 10px;
  fill: var(--cat-orange);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0;
  animation: cat-dim-fade 1s var(--cat-ease-register) 1.8s forwards;
}

@keyframes cat-dim-fade {
  to { opacity: 0.6; }
}

/* Hero text — normal flow, NO overlap, opacity:1 at first paint */
[data-design="b"] .rf-hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding: clamp(48px, 8vh, 96px) clamp(16px, 5vw, 60px);
}

[data-design="b"] .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="b"] .rf-hero__headline {
  font-family: var(--cat-font-display);
  font-size: clamp(32px, 5.5vw, 64px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--cat-ink);
  margin: 0 0 var(--cat-s-beam);
  max-width: 20ch;
}

[data-design="b"] .rf-hero__subtitle {
  font-family: var(--cat-font-body);
  font-size: clamp(16px, 2vw, 20px);
  color: var(--cat-graphite);
  margin: 0 0 var(--cat-s-stud);
  max-width: 52ch;
  line-height: 1.55;
}

[data-design="b"] .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 0 var(--cat-s-bay);
}

/* ─── E2: CTA / Tensor ──────────────────────────── */
[data-design="b"] .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;
  min-height: 44px;
}

[data-design="b"] .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="b"] .rf-cta:hover,
[data-design="b"] .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="b"] .rf-cta:active {
  transform: translateY(1px);
}

[data-design="b"] .rf-cta:active::after {
  opacity: 1;
}

[data-design="b"] .rf-cta__cable {
  width: 44px;
  height: 16px;
  overflow: visible;
}

[data-design="b"] .rf-cta__cable-line,
[data-design="b"] .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="b"] .rf-cta:hover .rf-cta__cable-line,
[data-design="b"] .rf-cta:focus-visible .rf-cta__cable-line {
  transform: translateY(-2px) scaleY(0.2);
}

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

[data-design="b"] .rf-cta--sm {
  font-size: 12px;
  padding: 11px 18px;
  animation: none;
}

/* ─── E6: POINTER ───────────────────────────────── */
/* Immediate preceding sibling of #funnel.
   bbox height: top+bottom padding (40px+56px) + inner element heights >> 8px */
[data-design="b"] .cat-pointer {
  display: flex;
  justify-content: center;
  padding: clamp(40px, 8vw, 80px) 16px clamp(56px, 10vw, 96px);
  background: var(--cat-bg);
}

[data-design="b"] .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="b"] .cat-pointer__tick {
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

[data-design="b"] .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="b"] .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 ease-in-out infinite;
  /* label starts invisible but uses animation — NOT opacity:0 static */
}

@keyframes cat-pointer-extend {
  0%, 100% { transform: scaleY(0.4); opacity: 0.4; }
  50%      { transform: scaleY(1);   opacity: 0.85; }
}

@keyframes cat-pointer-stamp {
  0%, 30%, 100% { opacity: 0; }
  50%, 70%      { opacity: 0.85; }
}

/* ─── E5: FUNNEL ─────────────────────────────────── */
[data-design="b"] .rf-interactive {
  background: var(--cat-bg);
  padding-block: var(--cat-s-frame);
  border-top: 1px solid var(--cat-hairline);
}

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

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

[data-design="b"] .rf-section-h {
  font-family: var(--cat-font-display);
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--cat-ink);
  margin: 0 0 var(--cat-s-span);
  max-width: 22ch;
}

/* beam progress bar */
[data-design="b"] .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="b"] .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="b"] .rf-beam__ticks {
  position: absolute;
  inset: 16px 0 auto 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--cat-font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cat-stone);
}

[data-design="b"] .rf-beam__ticks li {
  position: relative;
  padding-top: 8px;
  padding-left: 4px;
  border-top: 1px solid var(--cat-hairline);
}

[data-design="b"] .rf-beam__ticks li span {
  color: var(--cat-orange);
  margin-right: 4px;
}

/* funnel form */
[data-design="b"] .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="b"] .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="b"] .rf-step.is-active {
  display: block;
}

[data-design="b"] .rf-step.is-leaving {
  display: block;
  animation: cat-step-settle var(--cat-d-settle) var(--cat-ease-settle) both;
}

/* done step uses inline display:none — JS re-shows it with is-active class */

@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="b"] .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="b"] .rf-step__q {
  font-family: var(--cat-font-display);
  font-size: clamp(20px, 2.8vw, 26px);
  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="b"] .rf-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--cat-s-stud);
  margin-bottom: var(--cat-s-beam);
}

[data-design="b"] .rf-options--col {
  grid-template-columns: 1fr;
}

[data-design="b"] .rf-options label {
  display: flex;
  align-items: center;
  gap: var(--cat-s-stud);
  padding: var(--cat-s-stud) var(--cat-s-joist);
  border: 1px solid var(--cat-hairline);
  border-radius: var(--cat-r-edge);
  font-size: 15px;
  cursor: pointer;
  color: var(--cat-ink);
  min-height: 44px;
  transition:
    border-color var(--cat-d-quick) var(--cat-ease-register),
    background-color var(--cat-d-quick) linear;
}

[data-design="b"] .rf-options label:hover {
  border-color: var(--cat-orange);
}

[data-design="b"] .rf-options input[type="radio"] {
  accent-color: var(--cat-orange);
  min-width: 16px;
}

[data-design="b"] .rf-options label:has(input:checked) {
  border-color: var(--cat-orange);
  background: color-mix(in oklab, var(--cat-orange), transparent 92%);
}

[data-design="b"] .rf-members {
  display: grid;
  gap: var(--cat-s-joist);
  margin-bottom: var(--cat-s-beam);
}

[data-design="b"] .rf-member {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

[data-design="b"] .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="b"] .rf-member input {
  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;
  transition:
    border-color var(--cat-d-quick) var(--cat-ease-register),
    box-shadow var(--cat-d-quick) linear;
}

[data-design="b"] .rf-member input:focus-visible {
  border-color: var(--cat-orange);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--cat-orange), transparent 70%);
}

[data-design="b"] .rf-step__nav {
  display: flex;
  justify-content: space-between;
  gap: var(--cat-s-stud);
  margin-top: var(--cat-s-beam);
}

[data-design="b"] .rf-step__nav:has(.rf-tensor:only-child) {
  justify-content: flex-end;
}

[data-design="b"] .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="b"] .rf-tensor--primary {
  background: var(--cat-orange);
  color: var(--cat-bg);
  border-color: var(--cat-orange);
}

[data-design="b"] .rf-tensor--primary:hover {
  background: color-mix(in oklab, var(--cat-orange), black 8%);
}

[data-design="b"] .rf-tensor--secondary:hover {
  border-color: var(--cat-orange);
  color: var(--cat-orange);
}

[data-design="b"] .rf-tensor:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--cat-orange), transparent 70%);
}

[data-design="b"] .rf-tensor:active {
  transform: translateY(1px);
}

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

/* Below-funnel trust block */
[data-design="b"] .rf-funnel__trust {
  max-width: 880px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
  padding-top: var(--cat-s-bay);
  border-top: 1px solid var(--cat-mist);
  margin-top: var(--cat-s-span);
}

[data-design="b"] .rf-trust__line {
  font-family: var(--cat-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cat-stone);
  margin: 0 0 var(--cat-s-stud);
}

[data-design="b"] .rf-trust__phone,
[data-design="b"] .rf-trust__email {
  color: var(--cat-orange);
  text-decoration: none;
}

/* ─── PORTFOLIO ──────────────────────────────────── */
[data-design="b"] .rf-portfolio {
  background: var(--cat-surface);
  padding-block: var(--cat-s-frame);
  border-top: 1px solid var(--cat-mist);
}

[data-design="b"] .rf-portfolio__head {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
  margin-bottom: var(--cat-s-frame);
}

[data-design="b"] .rf-portfolio__grid {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 8vw, 96px);
}

[data-design="b"] .rf-project {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--cat-s-span);
  align-items: center;
}

[data-design="b"] .rf-project--flip {
  direction: rtl;
}

[data-design="b"] .rf-project--flip > * {
  direction: ltr;
}

[data-design="b"] .rf-project__photos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--cat-s-rivet);
}

[data-design="b"] .rf-project__photos img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--cat-r-edge);
  box-shadow: var(--cat-elev-ring);
}

[data-design="b"] .rf-project__num {
  font-family: var(--cat-font-mono);
  font-size: 36px;
  color: var(--cat-orange);
  letter-spacing: 0.04em;
  display: block;
  margin-bottom: var(--cat-s-stud);
}

[data-design="b"] .rf-project__title {
  font-family: var(--cat-font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 500;
  color: var(--cat-ink);
  letter-spacing: -0.01em;
  margin: 0 0 var(--cat-s-stud);
}

[data-design="b"] .rf-project__scope {
  font-family: var(--cat-font-body);
  font-size: 16px;
  color: var(--cat-graphite);
  line-height: 1.6;
  margin: 0;
  max-width: 48ch;
}

[data-design="b"] .rf-portfolio__cta {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
  padding-top: var(--cat-s-span);
  border-top: 1px solid var(--cat-mist);
  margin-top: var(--cat-s-span);
}

/* ─── E3 (SERVICES): Ambient-A isobars ──────────── */
[data-design="b"] .rf-ambient-a {
  position: relative;
  isolation: isolate;
  padding-block: var(--cat-s-frame);
  background: var(--cat-bg);
  overflow: hidden;
}

[data-design="b"] .rf-ambient-a__motion {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.35;
  pointer-events: none;
}

[data-design="b"] .rf-ambient-a__motion svg {
  width: 100%;
  height: 100%;
  display: block;
}

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

[data-design="b"] .rf-methods {
  display: flex;
  flex-direction: column;
}

[data-design="b"] .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="b"] .rf-method:last-child {
  border-bottom: 1px solid var(--cat-hairline);
}

[data-design="b"] .rf-method:hover {
  border-top-color: var(--cat-orange);
}

[data-design="b"] .rf-method__num {
  font-family: var(--cat-font-mono);
  color: var(--cat-orange);
  font-size: 26px;
  letter-spacing: 0.04em;
}

[data-design="b"] .rf-method h3 {
  font-family: var(--cat-font-display);
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 500;
  margin: 0 0 var(--cat-s-stud);
  color: var(--cat-ink);
  letter-spacing: -0.01em;
}

[data-design="b"] .rf-method p {
  margin: 0;
  color: var(--cat-graphite);
  max-width: 60ch;
  line-height: 1.55;
  font-size: 16px;
}

/* ─── E4 (ABOUT): Ambient-B membrane ─────────────── */
[data-design="b"] .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="b"] .rf-ambient-b__content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
}

[data-design="b"] .rf-studio {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: var(--cat-s-span);
  align-items: start;
}

[data-design="b"] .rf-studio__copy {
  font-family: var(--cat-font-body);
  font-size: 18px;
  line-height: 1.6;
  color: var(--cat-graphite);
}

[data-design="b"] .rf-studio__copy p {
  max-width: 60ch;
  margin: 0 0 var(--cat-s-beam);
}

[data-design="b"] .rf-data-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--cat-hairline);
  margin: 0;
  padding: 0;
  list-style: none;
}

[data-design="b"] .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="b"] .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="b"] .rf-data-list dd {
  font-family: var(--cat-font-mono);
  font-size: 14px;
  color: var(--cat-ink);
  margin: 0;
  font-variant-numeric: tabular-nums;
}

[data-design="b"] .rf-ambient-b__motion {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.18;
  pointer-events: none;
}

[data-design="b"] .rf-ambient-b__motion svg {
  width: 100%;
  height: 100%;
  display: block;
}

[data-design="b"] .rf-mb {
  fill: none;
  stroke: var(--cat-ink);
  stroke-width: .75;
  vector-effect: non-scaling-stroke;
}

[data-design="b"] .rf-mb__node {
  fill: var(--cat-ink);
}

[data-design="b"] .rf-mb__node--accent {
  fill: var(--cat-orange);
}

[data-design="b"] .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); }
}

/* ─── FOOTER ─────────────────────────────────────── */
[data-design="b"] .rf-footer {
  background: var(--cat-bg);
  padding-block: var(--cat-s-frame);
  border-top: 1px solid var(--cat-hairline);
}

[data-design="b"] .rf-footer__beam {
  height: 3px;
  background: var(--cat-orange);
  max-width: 1200px;
  margin-inline: auto;
  margin-bottom: var(--cat-s-span);
}

[data-design="b"] .rf-footer__grid {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 36px);
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--cat-s-span);
}

[data-design="b"] .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);
}

[data-design="b"] .rf-footer__license {
  font-family: var(--cat-font-mono);
  font-size: 12px;
  color: var(--cat-stone);
  letter-spacing: 0.06em;
  margin: 0 0 var(--cat-s-bolt);
}

[data-design="b"] .rf-footer__mono {
  font-family: var(--cat-font-mono);
  font-size: 13px;
  color: var(--cat-graphite);
  margin: 0 0 var(--cat-s-stud);
}

[data-design="b"] .rf-footer__mono a {
  color: var(--cat-orange);
  text-decoration: none;
}

[data-design="b"] .rf-footer__mono a:hover {
  text-decoration: underline;
}

[data-design="b"] .rf-footer__copy {
  font-family: var(--cat-font-mono);
  font-size: 11px;
  color: var(--cat-stone);
  letter-spacing: 0.08em;
  margin: var(--cat-s-beam) 0 0;
  text-transform: uppercase;
}


/* ═══════════════════════════════════════════════════
   REDUCED MOTION FALLBACKS
═══════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-chain__curve { animation: none; }
  [data-design="b"] .rf-burger span { transition: none; }
  [data-design="b"] .rf-hero__kb { animation: none; }
  [data-design="b"] .rf-diag__line { animation: none; stroke-dashoffset: 0; }
  [data-design="b"] .rf-diag__dim { animation: none; opacity: 0.6; }
  [data-design="b"] .rf-cta { animation: none; }
  [data-design="b"] .rf-cta__cable-line,
  [data-design="b"] .rf-cta__cable-head { transition: none; }
  [data-design="b"] .cat-pointer__rule { animation: none; opacity: 0.7; }
  [data-design="b"] .cat-pointer__label { animation: none; opacity: 0.7; }
  [data-design="b"] .rf-isobar { animation: none; transform: none; }
  [data-design="b"] .rf-step,
  [data-design="b"] .rf-step.is-leaving { animation: none; }
  [data-design="b"] .rf-beam__fill { transition: none; }
  [data-design="b"] .rf-ambient-b.is-live .rf-membrane { animation: none; }
}


/* ═══════════════════════════════════════════════════
   RESPONSIVE — SCOPED EXACTLY PER CONTRACT
═══════════════════════════════════════════════════ */

/* Tablet: ≤768px */
@media (max-width: 768px) {
  [data-design="b"] .rf-project {
    grid-template-columns: 1fr;
  }

  [data-design="b"] .rf-project--flip {
    direction: ltr;
  }

  [data-design="b"] .rf-studio {
    grid-template-columns: 1fr;
    gap: var(--cat-s-beam);
  }

  [data-design="b"] .rf-method {
    grid-template-columns: 1fr;
    gap: var(--cat-s-stud);
  }

  [data-design="b"] .rf-method__num {
    font-size: 20px;
  }

  [data-design="b"] .rf-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--cat-s-beam);
  }
}

/* Mobile: ≤560px */
@media (max-width: 560px) {
  [data-design="b"] .rf-header__bar { padding-block: 10px; }
  [data-design="b"] .rf-logo__mark { font-size: 15px; }
  [data-design="b"] .rf-drawer { inset: 56px 0 0 0; }
  [data-design="b"] .rf-options { grid-template-columns: 1fr; }
  [data-design="b"] .rf-funnel { padding: var(--cat-s-beam); min-height: 320px; }
  [data-design="b"] .rf-beam__ticks { font-size: 8px; }
  [data-design="b"] .rf-project__photos { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════
   MOBILE ANTI-SCROLL GUARDS (contract-required, bottom of file)
   Scoped to .dq-design — NEVER bare [data-design] descendant.
═══════════════════════════════════════════════════ */
[data-design="b"].dq-design,
[data-design="b"] .dq-design {
  max-width: 100%;
  overflow-x: clip;
}

[data-design="b"].dq-design * {
  min-width: 0;
}

[data-design="b"].dq-design img,
[data-design="b"].dq-design svg:not([data-keep-size]) {
  max-width: 100%;
  height: auto;
}

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