/* =============================================================
   Formwork design system — scoped to [data-design="b"]
   Design: Formwork · Client: ID Roofing LLC · Boise, ID
   All selectors under [data-design="b"] — ZERO bare/global rules.
   design-b-primary exposed per contract.
   ============================================================= */

/* ── Design tokens ─────────────────────────────────────────── */
[data-design="b"] {
  --fw-bone:        #F2EFE8;
  --fw-page:        #FAF7F0;
  --fw-aggregate:   #C7C2BA;
  --fw-shadow:      #6B665E;
  --fw-ink:         #1A1815;
  --fw-rust:        #8C4A2E;
  --fw-rebar:       #5C5246;
  --fw-critical:    #7A2B1F;
  --fw-success:     #4A5C3E;
  /* contract-required alias */
  --design-b-primary: #8C4A2E;

  /* Motion */
  --fw-set:       180ms cubic-bezier(0.32,0.08,0.24,1);
  --fw-register:  320ms cubic-bezier(0.22,0.61,0.36,1);
  --fw-pour:      820ms cubic-bezier(0.65,0,0.35,1);
  --fw-cure:     1400ms cubic-bezier(0.83,0,0.17,1);
  --fw-breath:   4800ms ease-in-out;
  --fw-draw-line:  22s  linear;

  /* Spacing */
  --fw-hair:   1px;
  --fw-joint:  8px;
  --fw-board: 16px;
  --fw-bay:   32px;
  --fw-pour-sp: 64px;
  --fw-slab:  112px;
  --fw-monolith: 176px;

  /* Type */
  --fw-display: "Söhne Breit","Neue Haas Grotesk Display","Inter Display",-apple-system,sans-serif;
  --fw-body:    "Söhne","Neue Haas Grotesk Text","Inter",-apple-system,sans-serif;
  --fw-mono:    "Söhne Mono","JetBrains Mono",ui-monospace,"SF Mono",monospace;

  /* Radius */
  --fw-r-cast:  2px;
  --fw-r-stamp: 0px;

  box-sizing: border-box;
  background: var(--fw-bone);
  color: var(--fw-ink);
  font-family: var(--fw-body);
  font-size: clamp(16px,1.25vw,19px);
  line-height: 1.55;
}

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

/* ── Reset basics ──────────────────────────────────────────── */
[data-design="b"] h1,
[data-design="b"] h2,
[data-design="b"] h3 { margin: 0; font-weight: 600; line-height: 1; }
[data-design="b"] p  { margin: 0; }
[data-design="b"] ul,
[data-design="b"] ol { margin: 0; padding: 0; list-style: none; }
[data-design="b"] a  { color: inherit; }
[data-design="b"] button { font-family: inherit; }
[data-design="b"] textarea { font-family: inherit; resize: vertical; }

/* ── Keynote (mono caption) ────────────────────────────────── */
[data-design="b"] .rf-keynote {
  font-family: var(--fw-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fw-shadow);
  margin: 0;
}

/* =============================================================
   E1 — HEADER
   ============================================================= */
[data-design="b"] .rf-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--fw-bone);
  border-bottom: 1px solid var(--fw-rebar);
}
[data-design="b"] .rf-header__pour {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
[data-design="b"] .rf-header__line {
  position: absolute;
  left: -40%;
  height: 1px;
  width: 60%;
  background: linear-gradient(90deg,transparent 0%,var(--fw-ink) 50%,transparent 100%);
  opacity: 0.18;
}
[data-design="b"] .rf-header__line--a { top: 28%; animation: fw-header-draw-a 28s linear infinite; }
[data-design="b"] .rf-header__line--b { top: 71%; animation: fw-header-draw-b 31s linear infinite; }
[data-design="b"] .rf-header__bar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(16px,2.5vw,28px) clamp(16px,4vw,48px);
}
[data-design="b"] .rf-logo { text-decoration: none; }
[data-design="b"] .rf-logo__mark {
  font-family: var(--fw-display);
  font-weight: 600;
  font-size: clamp(18px,2vw,26px);
  letter-spacing: -0.015em;
  color: var(--fw-ink);
}
[data-design="b"] .rf-hamburger {
  background: transparent;
  border: 0;
  padding: 10px;
  display: inline-flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}
[data-design="b"] .rf-hamburger__bar {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--fw-ink);
  transition: transform var(--fw-register), background-color var(--fw-set);
}
[data-design="b"] .rf-hamburger[aria-expanded="true"] .rf-hamburger__bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}
[data-design="b"] .rf-hamburger[aria-expanded="true"] .rf-hamburger__bar:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Drawer: display:none when closed (not opacity:0) */
[data-design="b"] .rf-drawer {
  position: fixed;
  inset: 0;
  background: var(--fw-bone);
  z-index: 50;
  overflow-y: auto;
}
[data-design="b"] .rf-drawer__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(60px,10vh,120px) clamp(16px,4vw,48px) clamp(48px,8vh,80px);
  display: flex;
  flex-direction: column;
  gap: var(--fw-board);
}
[data-design="b"] .rf-drawer__link {
  font-family: var(--fw-display);
  font-size: clamp(28px,5vw,56px);
  color: var(--fw-ink);
  text-decoration: none;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--fw-rebar);
  padding-bottom: var(--fw-joint);
  transition: color var(--fw-set);
}
[data-design="b"] .rf-drawer__link:hover,
[data-design="b"] .rf-drawer__link:focus-visible { color: var(--fw-rust); outline: none; }
[data-design="b"] .rf-drawer__phone {
  font-family: var(--fw-mono);
  font-size: clamp(16px,2vw,22px);
  letter-spacing: 0.04em;
  color: var(--fw-shadow);
  text-decoration: none;
  padding: var(--fw-board) 0;
  border-bottom: 1px solid var(--fw-rebar);
  min-height: 44px;
  display: flex;
  align-items: center;
}
[data-design="b"] .rf-drawer__cta { margin-top: var(--fw-bay); align-self: flex-start; }
[data-design="b"] .rf-drawer__close {
  position: absolute;
  top: clamp(16px,2.5vw,28px);
  right: clamp(16px,4vw,48px);
  background: transparent;
  border: 0;
  font-family: var(--fw-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--fw-ink);
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

@keyframes fw-header-draw-a {
  0%   { transform: translateX(0);   opacity: 0;    }
  12%  { opacity: 0.18; }
  88%  { opacity: 0.18; }
  100% { transform: translateX(280%); opacity: 0;   }
}
@keyframes fw-header-draw-b {
  0%   { transform: translateX(0);   opacity: 0;    }
  10%  { opacity: 0.14; }
  90%  { opacity: 0.14; }
  100% { transform: translateX(280%); opacity: 0;   }
}

/* =============================================================
   HERO — E3 animated substrate + text
   ============================================================= */
[data-design="b"] .rf-hero {
  position: relative;
  min-height: clamp(60vh,72vh,84vh);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  background: var(--fw-bone);
  padding: clamp(80px,10vh,140px) clamp(16px,4vw,48px) clamp(72px,8vh,120px);
}

/* E3: SVG ridge + ambient planes — ONE animated layer */
[data-design="b"] .rf-hero__backdrop {
  position: absolute;
  inset: 0;
  pointer-events: none;
  /* Single animated layer: the SVG + planes animate together as one unit */
}
[data-design="b"] .rf-hero__ridge-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--fw-rebar);
  opacity: 0.55;
}

/* Ridge lines: draw in on arrival then sustain ambient breath */
[data-design="b"] .rf-ridge {
  stroke-dasharray: 2000;
  stroke-dashoffset: 2000;
  animation: fw-ridge-draw 2s cubic-bezier(0.65,0,0.35,1) 0.1s forwards,
             fw-ridge-breath 8s ease-in-out 2.5s infinite;
}
[data-design="b"] .rf-ridge--right {
  animation: fw-ridge-draw 2s cubic-bezier(0.65,0,0.35,1) 0.3s forwards,
             fw-ridge-breath 8s ease-in-out 2.7s infinite;
}

/* Course lines: lay in one by one after ridge, then sustain */
[data-design="b"] .rf-course {
  stroke-dasharray: 800;
  stroke-dashoffset: 800;
  opacity: 0.32;
}
[data-design="b"] .rf-course--1 {
  animation: fw-course-lay 1.4s cubic-bezier(0.65,0,0.35,1) 0.6s forwards,
             fw-course-breathe 9.6s ease-in-out 2.4s infinite;
}
[data-design="b"] .rf-course--1.rf-course--right {
  animation: fw-course-lay 1.4s cubic-bezier(0.65,0,0.35,1) 0.8s forwards,
             fw-course-breathe 9.6s ease-in-out 2.6s infinite;
}
[data-design="b"] .rf-course--2 {
  animation: fw-course-lay 1.4s cubic-bezier(0.65,0,0.35,1) 1.0s forwards,
             fw-course-breathe 9.6s ease-in-out 3.0s infinite;
}
[data-design="b"] .rf-course--2.rf-course--right {
  animation: fw-course-lay 1.4s cubic-bezier(0.65,0,0.35,1) 1.2s forwards,
             fw-course-breathe 9.6s ease-in-out 3.2s infinite;
}
[data-design="b"] .rf-course--3 {
  animation: fw-course-lay 1.4s cubic-bezier(0.65,0,0.35,1) 1.4s forwards,
             fw-course-breathe 9.6s ease-in-out 3.4s infinite;
}
[data-design="b"] .rf-course--3.rf-course--right {
  animation: fw-course-lay 1.4s cubic-bezier(0.65,0,0.35,1) 1.6s forwards,
             fw-course-breathe 9.6s ease-in-out 3.6s infinite;
}
[data-design="b"] .rf-rake {
  stroke-dasharray: 600;
  stroke-dashoffset: 600;
  opacity: 0.18;
  animation: fw-course-lay 2s cubic-bezier(0.65,0,0.35,1) 1.8s forwards;
}
[data-design="b"] .rf-rake--right {
  animation: fw-course-lay 2s cubic-bezier(0.65,0,0.35,1) 2.0s forwards;
}

/* Ambient color planes — sustain ongoing tonal motion */
[data-design="b"] .rf-hero__plane {
  position: absolute;
  top: 0;
  width: 50%;
  height: 100%;
  opacity: 0;
  animation: fw-plane-settle 1.8s ease-out 0.4s forwards,
             fw-plane-shift 12s ease-in-out 2.8s infinite;
}
[data-design="b"] .rf-hero__plane--left {
  left: 0;
  clip-path: polygon(0 100%, 50% 0%, 100% 100%);
  background: linear-gradient(160deg, var(--fw-aggregate) 0%, transparent 70%);
}
[data-design="b"] .rf-hero__plane--right {
  right: 0;
  clip-path: polygon(0 100%, 50% 0%, 100% 100%);
  background: linear-gradient(200deg, var(--fw-aggregate) 0%, transparent 70%);
  animation-delay: 0.6s, 3.2s;
}

@keyframes fw-ridge-draw {
  to { stroke-dashoffset: 0; }
}
@keyframes fw-ridge-breath {
  0%,100% { opacity: 0.55; }
  50%     { opacity: 0.38; }
}
@keyframes fw-course-lay {
  to { stroke-dashoffset: 0; }
}
@keyframes fw-course-breathe {
  0%,100% { opacity: 0.32; }
  50%     { opacity: 0.18; }
}
@keyframes fw-plane-settle {
  from { opacity: 0; }
  to   { opacity: 0.28; }
}
@keyframes fw-plane-shift {
  0%,100% { opacity: 0.28; transform: scaleY(1); }
  50%     { opacity: 0.42; transform: scaleY(1.015); }
}

/* Hero content */
[data-design="b"] .rf-hero__content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: clamp(16px,2vw,28px);
  /* opacity:1 set inline in HTML for first-paint */
}
[data-design="b"] .rf-hero__keynote {
  color: var(--fw-shadow);
}
[data-design="b"] .rf-hero__headline {
  font-family: var(--fw-display);
  font-weight: 600;
  font-size: clamp(36px,6.5vw,96px);
  letter-spacing: -0.02em;
  line-height: 0.97;
  color: var(--fw-ink);
  max-width: 20ch;
}
[data-design="b"] .rf-hero__subtitle {
  font-family: var(--fw-body);
  font-size: clamp(16px,1.5vw,22px);
  color: var(--fw-shadow);
  max-width: 52ch;
  line-height: 1.45;
}
[data-design="b"] .rf-hero__proof {
  font-family: var(--fw-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fw-shadow);
}
[data-design="b"] .rf-hero__ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(12px,2vw,24px);
  margin-top: clamp(8px,1.5vw,16px);
}
[data-design="b"] .rf-hero__phone-secondary {
  font-family: var(--fw-mono);
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--fw-shadow);
  text-decoration: none;
  border-bottom: 1px solid var(--fw-rebar);
  padding-bottom: 2px;
  min-height: 44px;
  display: flex;
  align-items: center;
  transition: color var(--fw-set), border-color var(--fw-set);
}
[data-design="b"] .rf-hero__phone-secondary:hover { color: var(--fw-rust); border-color: var(--fw-rust); }

/* =============================================================
   E2 — CTA (stamp button)
   ============================================================= */
[data-design="b"] .rf-cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--fw-board);
  padding: 18px 28px;
  background: var(--fw-rust);
  color: var(--fw-bone);
  font-family: var(--fw-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--fw-r-cast);
  border: 0;
  cursor: pointer;
  will-change: transform;
  transition: transform var(--fw-set), background-color var(--fw-set);
  animation: fw-cta-breath 4.8s ease-in-out infinite;
  overflow: hidden;
  min-height: 52px;
}
[data-design="b"] .rf-cta__grain {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(6deg, transparent 0 6px, rgba(26,24,21,0.08) 6px 7px);
  transition: transform var(--fw-set);
  pointer-events: none;
}
[data-design="b"] .rf-cta__label  { position: relative; }
[data-design="b"] .rf-cta__arrow  { position: relative; transition: transform var(--fw-register); }
[data-design="b"] .rf-cta::after {
  content: "";
  position: absolute;
  left: 28px; right: 28px; bottom: 12px;
  height: 1px;
  background: var(--fw-bone);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--fw-register);
}
[data-design="b"] .rf-cta:hover::after,
[data-design="b"] .rf-cta:focus-visible::after  { transform: scaleX(1); }
[data-design="b"] .rf-cta:hover .rf-cta__arrow,
[data-design="b"] .rf-cta:focus-visible .rf-cta__arrow { transform: translateX(6px); }
[data-design="b"] .rf-cta:focus-visible { outline: 2px solid var(--fw-rebar); outline-offset: 4px; }
[data-design="b"] .rf-cta:active { transform: translateY(2px); }
[data-design="b"] .rf-cta:active .rf-cta__grain { transform: translateX(1px); }

@keyframes fw-cta-breath {
  0%,100% { box-shadow: 0 0 0 0 rgba(140,74,46,0.0); }
  50%     { box-shadow: 0 0 0 8px rgba(140,74,46,0.12); }
}

/* =============================================================
   E6 — POINTER (dimension-line, between hero and #funnel)
   Height strictly >8px (uses padding+tick+rule for total bbox ≥ 80px)
   ============================================================= */
[data-design="b"] .fw-pointer {
  display: flex;
  justify-content: center;
  padding: clamp(40px,8vw,80px) 16px clamp(56px,10vw,96px);
  background: var(--fw-bone);
  color: var(--fw-rebar);
}
[data-design="b"] .fw-pointer__hit {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: currentColor;
  min-height: 80px;  /* HARD gate: height strictly >8px */
}
[data-design="b"] .fw-pointer__tick {
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}
[data-design="b"] .fw-pointer__rule {
  display: block;
  width: 1px;
  height: 56px;
  background: currentColor;
  transform-origin: top center;
  animation: fw-pointer-extend 5s ease-in-out infinite;
}
[data-design="b"] .fw-pointer__label {
  font-family: var(--fw-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0;
  animation: fw-pointer-stamp 5s ease-in-out infinite;
}

@keyframes fw-pointer-extend {
  0%,100% { transform: scaleY(0.4); opacity: 0.4; }
  50%     { transform: scaleY(1);   opacity: 0.85; }
}
@keyframes fw-pointer-stamp {
  0%,30%,100% { opacity: 0;    }
  50%,70%     { opacity: 0.85; }
}

/* =============================================================
   E5 — FUNNEL
   ============================================================= */
[data-design="b"] .rf-interactive {
  background: var(--fw-bone);
  padding: clamp(64px,10vw,112px) clamp(16px,4vw,48px);
}
[data-design="b"] .rf-interactive__header {
  max-width: 1280px;
  margin: 0 auto var(--fw-bay);
}
[data-design="b"] .rf-interactive__title {
  font-family: var(--fw-display);
  font-weight: 600;
  font-size: clamp(28px,4.5vw,56px);
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--fw-ink);
  margin: var(--fw-board) 0 var(--fw-board);
}
[data-design="b"] .rf-interactive__sub {
  font-family: var(--fw-body);
  font-size: clamp(16px,1.4vw,19px);
  color: var(--fw-shadow);
  max-width: 56ch;
  margin: 0;
}
[data-design="b"] .rf-funnel {
  max-width: 1280px;
  margin: 0 auto;
}
[data-design="b"] .rf-funnel__steps {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--fw-rebar);
}
[data-design="b"] .rf-funnel__step {
  border-bottom: 1px solid var(--fw-rebar);
  transition: background-color var(--fw-register);
}
[data-design="b"] .rf-funnel__step[data-state="active"] { background: var(--fw-page); }
[data-design="b"] .rf-funnel__step[data-state="done"]   { background: var(--fw-bone); }
[data-design="b"] .rf-funnel__title-block {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: var(--fw-board);
  padding: var(--fw-board) var(--fw-bay);
  cursor: default;
}
[data-design="b"] .rf-funnel__step[data-state="done"] .rf-funnel__title-block { cursor: pointer; }
[data-design="b"] .rf-funnel__index {
  font-family: var(--fw-display);
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--fw-rebar);
}
[data-design="b"] .rf-funnel__label {
  font-family: var(--fw-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fw-ink);
}
[data-design="b"] .rf-funnel__stamp {
  font-family: var(--fw-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 4px 8px;
  border: 1px solid var(--fw-rebar);
  color: var(--fw-shadow);
  text-transform: uppercase;
}
[data-design="b"] .rf-funnel__step[data-state="done"]   .rf-funnel__stamp { background: var(--fw-rust); border-color: var(--fw-rust); color: var(--fw-bone); }
[data-design="b"] .rf-funnel__step[data-state="active"] .rf-funnel__stamp { color: var(--fw-rust); border-color: var(--fw-rust); }

/* Accordion pour: grid-template-rows trick */
[data-design="b"] .rf-funnel__pour {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--fw-pour);
  overflow: hidden;
}
[data-design="b"] .rf-funnel__step[data-state="active"] .rf-funnel__pour { grid-template-rows: 1fr; }
[data-design="b"] .rf-funnel__pour > * { min-height: 0; }

[data-design="b"] .rf-funnel__field {
  border: 0;
  padding: var(--fw-bay);
  display: grid;
  gap: var(--fw-board);
}
[data-design="b"] .rf-funnel__field legend {
  font-family: var(--fw-body);
  font-size: clamp(18px,2vw,26px);
  color: var(--fw-ink);
  padding: 0 0 var(--fw-board);
  max-width: 36ch;
}
[data-design="b"] .rf-funnel__choices {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(200px,1fr));
  gap: var(--fw-joint);
}
[data-design="b"] .rf-funnel__choices label {
  display: flex;
  align-items: center;
  gap: var(--fw-joint);
  padding: var(--fw-board);
  border: 1px solid var(--fw-rebar);
  border-radius: var(--fw-r-cast);
  cursor: pointer;
  font-family: var(--fw-body);
  font-size: 16px;
  transition: border-color var(--fw-set), background-color var(--fw-set);
  min-height: 52px;
}
[data-design="b"] .rf-funnel__choices label:hover { border-color: var(--fw-ink); }
[data-design="b"] .rf-funnel__choices input[type="radio"] { accent-color: var(--fw-rust); min-width: 18px; min-height: 18px; }
[data-design="b"] .rf-funnel__choices label:has(input:checked) { background: var(--fw-bone); border-color: var(--fw-rust); }

[data-design="b"] .rf-funnel__input {
  display: grid;
  gap: 6px;
  padding: var(--fw-joint) 0;
}
[data-design="b"] .rf-funnel__input--full { grid-column: 1/-1; }
[data-design="b"] .rf-funnel__input span {
  font-family: var(--fw-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fw-shadow);
}
[data-design="b"] .rf-funnel__input input,
[data-design="b"] .rf-funnel__input textarea {
  font-family: var(--fw-body);
  font-size: 18px;
  border: 0;
  border-bottom: 1px solid var(--fw-rebar);
  padding: 6px 0;
  background: transparent;
  color: var(--fw-ink);
  width: 100%;
}
[data-design="b"] .rf-funnel__input input:focus,
[data-design="b"] .rf-funnel__input textarea:focus {
  outline: none;
  border-bottom-color: var(--fw-rust);
  border-bottom-width: 2px;
}
[data-design="b"] .rf-funnel__actions {
  display: flex;
  gap: var(--fw-board);
  padding: 0 var(--fw-bay) var(--fw-bay);
  flex-wrap: wrap;
}
[data-design="b"] .rf-funnel__next,
[data-design="b"] .rf-funnel__submit {
  font-family: var(--fw-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 14px 24px;
  background: var(--fw-ink);
  color: var(--fw-bone);
  border: 0;
  border-radius: var(--fw-r-cast);
  cursor: pointer;
  transition: background-color var(--fw-set), transform var(--fw-set);
  min-height: 48px;
}
[data-design="b"] .rf-funnel__submit { background: var(--fw-rust); }
[data-design="b"] .rf-funnel__next:hover,
[data-design="b"] .rf-funnel__submit:hover { transform: translateY(-1px); }
[data-design="b"] .rf-funnel__next:active,
[data-design="b"] .rf-funnel__submit:active { transform: translateY(1px); }
[data-design="b"] .rf-funnel__back {
  font-family: var(--fw-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 14px 16px;
  background: transparent;
  color: var(--fw-ink);
  border: 0;
  cursor: pointer;
  min-height: 48px;
}

[data-design="b"] .rf-funnel__done {
  padding: var(--fw-bay);
  border: 1px solid var(--fw-rebar);
  background: var(--fw-page);
  animation: fw-step-in var(--fw-pour) both;
}
[data-design="b"] .rf-funnel__done h3 {
  font-family: var(--fw-display);
  font-size: clamp(24px,3.5vw,42px);
  color: var(--fw-ink);
  margin: var(--fw-joint) 0;
  letter-spacing: -0.015em;
}
[data-design="b"] .rf-funnel__done p {
  font-family: var(--fw-body);
  color: var(--fw-shadow);
  max-width: 56ch;
}

@keyframes fw-step-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

[data-design="b"] .rf-funnel__trust {
  max-width: 1280px;
  margin: var(--fw-bay) auto 0;
  padding-top: var(--fw-bay);
  border-top: 1px solid var(--fw-rebar);
}
[data-design="b"] .rf-funnel__trust-body {
  font-family: var(--fw-body);
  font-size: clamp(16px,1.3vw,18px);
  color: var(--fw-shadow);
  max-width: 64ch;
  margin-top: var(--fw-board);
  line-height: 1.6;
}
[data-design="b"] .rf-funnel__trust-note {
  font-family: var(--fw-body);
  font-size: 15px;
  color: var(--fw-shadow);
  max-width: 60ch;
  margin-top: var(--fw-board);
}

/* =============================================================
   E3 (ambient A) — SERVICES section with section-cut hairlines
   ============================================================= */
[data-design="b"] .rf-ambient-a {
  position: relative;
  background: var(--fw-bone);
  padding: clamp(64px,10vw,112px) clamp(16px,4vw,48px);
  overflow: hidden;
}
[data-design="b"] .rf-ambient-a__cuts {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
[data-design="b"] .rf-ambient-a__cut {
  position: absolute;
  left: 0;
  height: 1px;
  width: 100%;
  background: var(--fw-ink);
  opacity: 0;
  transform-origin: left center;
  transform: scaleX(0);
}
[data-design="b"] .rf-ambient-a__cut--top { top: 26%; animation: fw-cut-draw 22s linear infinite; }
[data-design="b"] .rf-ambient-a__cut--bot { top: 74%; animation: fw-cut-draw 28s linear infinite; animation-delay: -7s; }
[data-design="b"] .rf-ambient-a__inner {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--fw-bay);
}
[data-design="b"] .rf-ambient-a__title {
  font-family: var(--fw-display);
  font-weight: 600;
  font-size: clamp(36px,6vw,96px);
  letter-spacing: -0.02em;
  line-height: 0.96;
  color: var(--fw-ink);
  max-width: 18ch;
}
[data-design="b"] .rf-ambient-a__body {
  font-family: var(--fw-body);
  font-size: clamp(16px,1.4vw,19px);
  line-height: 1.55;
  color: var(--fw-shadow);
  max-width: 60ch;
}

/* Services numbered index */
[data-design="b"] .rf-services__index {
  border-top: 1px solid var(--fw-rebar);
}
[data-design="b"] .rf-services__row {
  display: grid;
  grid-template-columns: 56px 1fr 3fr;
  gap: var(--fw-board);
  align-items: baseline;
  padding: var(--fw-board) 0;
  border-bottom: 1px solid var(--fw-rebar);
  transition: background-color var(--fw-set);
}
[data-design="b"] .rf-services__row:hover { background: var(--fw-page); }
[data-design="b"] .rf-services__num {
  font-family: var(--fw-display);
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--fw-rebar);
}
[data-design="b"] .rf-services__name {
  font-family: var(--fw-body);
  font-size: clamp(16px,1.4vw,19px);
  font-weight: 500;
  color: var(--fw-ink);
}
[data-design="b"] .rf-services__desc {
  font-family: var(--fw-body);
  font-size: 15px;
  color: var(--fw-shadow);
  line-height: 1.5;
}

@keyframes fw-cut-draw {
  0%   { transform: scaleX(0); opacity: 0; }
  8%   { opacity: 0.22; }
  60%  { transform: scaleX(1); opacity: 0.22; }
  80%  { opacity: 0; }
  100% { transform: scaleX(1); opacity: 0; transform-origin: right center; }
}

/* =============================================================
   E4 (ambient B) — PROCESS section with curing slab
   ============================================================= */
[data-design="b"] .rf-ambient-b {
  position: relative;
  padding: clamp(64px,10vw,112px) clamp(16px,4vw,48px);
  overflow: hidden;
  isolation: isolate;
}
[data-design="b"] .rf-ambient-b__slab {
  position: absolute;
  inset: 0;
  background: var(--fw-aggregate);
  animation: fw-slab-cure 18s ease-in-out infinite;
  z-index: -1;
}
[data-design="b"] .rf-ambient-b__aggregate {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 12% 18%, var(--fw-ink) 0 1px, transparent 1.5px),
    radial-gradient(circle at 78% 32%, var(--fw-ink) 0 1px, transparent 1.5px),
    radial-gradient(circle at 34% 64%, var(--fw-ink) 0 1px, transparent 1.5px),
    radial-gradient(circle at 89% 81%, var(--fw-ink) 0 1px, transparent 1.5px),
    radial-gradient(circle at 6%  92%, var(--fw-ink) 0 1px, transparent 1.5px),
    radial-gradient(circle at 56% 12%, var(--fw-ink) 0 1px, transparent 1.5px),
    radial-gradient(circle at 22% 44%, var(--fw-ink) 0 1px, transparent 1.5px),
    radial-gradient(circle at 71% 58%, var(--fw-ink) 0 1px, transparent 1.5px);
  background-size: 100% 100%;
  opacity: 0.32;
  animation: fw-aggregate-breath 6.4s ease-in-out infinite;
}
[data-design="b"] .rf-ambient-b__inner {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  gap: var(--fw-bay);
  color: var(--fw-bone);
}
[data-design="b"] .rf-ambient-b__title {
  font-family: var(--fw-display);
  font-weight: 500;
  font-size: clamp(28px,4.5vw,56px);
  letter-spacing: -0.015em;
  line-height: 1;
  color: var(--fw-bone);
}
[data-design="b"] .rf-ambient-b__body {
  font-family: var(--fw-body);
  font-size: clamp(16px,1.4vw,19px);
  line-height: 1.55;
  color: var(--fw-bone);
  opacity: 0.85;
  max-width: 56ch;
}
[data-design="b"] .rf-ambient-b .rf-keynote { color: rgba(242,239,232,0.7); }

[data-design="b"] .rf-process__phases {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(200px,1fr));
  gap: var(--fw-board);
  border-top: 1px solid rgba(242,239,232,0.25);
  padding-top: var(--fw-bay);
}
[data-design="b"] .rf-process__phase {
  display: flex;
  flex-direction: column;
  gap: var(--fw-joint);
  padding: var(--fw-board);
  border: 1px solid rgba(242,239,232,0.2);
  border-radius: var(--fw-r-cast);
}
[data-design="b"] .rf-process__phase-num {
  font-family: var(--fw-display);
  font-size: 20px;
  color: rgba(242,239,232,0.5);
  letter-spacing: -0.01em;
}
[data-design="b"] .rf-process__phase-name {
  font-family: var(--fw-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--fw-bone);
}
[data-design="b"] .rf-process__phase-desc {
  font-family: var(--fw-body);
  font-size: 14px;
  color: rgba(242,239,232,0.7);
  line-height: 1.5;
}

@keyframes fw-slab-cure {
  0%,100% { background: var(--fw-aggregate); }
  50%     { background: color-mix(in oklab, var(--fw-aggregate), var(--fw-shadow) 40%); }
}
@keyframes fw-aggregate-breath {
  0%,100% { opacity: 0.28; transform: scale(1);     }
  50%     { opacity: 0.42; transform: scale(1.012); }
}

/* =============================================================
   SERVICE AREA
   ============================================================= */
[data-design="b"] .rf-service-area {
  background: var(--fw-page);
  padding: clamp(64px,10vw,112px) clamp(16px,4vw,48px);
  border-top: 1px solid var(--fw-rebar);
  border-bottom: 1px solid var(--fw-rebar);
}
[data-design="b"] .rf-service-area__inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  gap: var(--fw-board);
}
[data-design="b"] .rf-service-area__title {
  font-family: var(--fw-display);
  font-weight: 600;
  font-size: clamp(28px,4vw,56px);
  letter-spacing: -0.015em;
  color: var(--fw-ink);
  margin-top: var(--fw-board);
}
[data-design="b"] .rf-service-area__body {
  font-family: var(--fw-body);
  font-size: clamp(16px,1.4vw,19px);
  color: var(--fw-shadow);
  max-width: 56ch;
  line-height: 1.6;
}

/* =============================================================
   REPEATED FUNNEL CTA
   ============================================================= */
[data-design="b"] .rf-repeat-cta {
  background: var(--fw-bone);
  padding: clamp(80px,10vw,140px) clamp(16px,4vw,48px);
  border-top: 1px solid var(--fw-rebar);
}
[data-design="b"] .rf-repeat-cta__inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--fw-board);
  align-items: flex-start;
}
[data-design="b"] .rf-repeat-cta__title {
  font-family: var(--fw-display);
  font-weight: 600;
  font-size: clamp(28px,4.5vw,64px);
  letter-spacing: -0.02em;
  color: var(--fw-ink);
  max-width: 22ch;
}
[data-design="b"] .rf-repeat-cta__sub {
  font-family: var(--fw-body);
  font-size: clamp(16px,1.4vw,19px);
  color: var(--fw-shadow);
  max-width: 52ch;
  margin-bottom: var(--fw-board);
}

/* =============================================================
   FOOTER
   ============================================================= */
[data-design="b"] .rf-footer {
  background: var(--fw-bone);
  border-top: 1px solid var(--fw-rebar);
  padding: clamp(48px,6vw,80px) clamp(16px,4vw,48px) clamp(32px,4vw,56px);
  position: relative;
  overflow: hidden;
}
[data-design="b"] .rf-footer__draw {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--fw-ink);
  opacity: 0;
  animation: fw-footer-draw var(--fw-draw-line) linear infinite;
  transform-origin: left center;
}
@keyframes fw-footer-draw {
  0%   { transform: scaleX(0); opacity: 0; }
  5%   { opacity: 0.3; }
  80%  { transform: scaleX(1); opacity: 0.3; }
  100% { opacity: 0; }
}
[data-design="b"] .rf-footer__inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(200px,1fr));
  gap: var(--fw-bay);
  margin-bottom: var(--fw-bay);
}
[data-design="b"] .rf-footer__block .rf-keynote { margin-bottom: var(--fw-board); }
[data-design="b"] .rf-footer__address {
  font-family: var(--fw-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--fw-shadow);
  line-height: 1.6;
}
[data-design="b"] .rf-footer__phone {
  display: block;
  font-family: var(--fw-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--fw-ink);
  text-decoration: none;
  margin-top: var(--fw-joint);
  transition: color var(--fw-set);
}
[data-design="b"] .rf-footer__phone:hover { color: var(--fw-rust); }
[data-design="b"] .rf-footer__block p {
  font-family: var(--fw-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--fw-shadow);
  line-height: 1.7;
}
[data-design="b"] .rf-footer__base {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: var(--fw-board);
  border-top: 1px solid var(--fw-rebar);
}
[data-design="b"] .rf-footer__copy {
  font-family: var(--fw-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--fw-shadow);
}

/* =============================================================
   REDUCED MOTION FALLBACKS
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-header__line--a,
  [data-design="b"] .rf-header__line--b { animation: none; opacity: 0.1; transform: translateX(80%); }

  [data-design="b"] .rf-ridge         { animation: none; stroke-dashoffset: 0; }
  [data-design="b"] .rf-ridge--right  { animation: none; stroke-dashoffset: 0; }
  [data-design="b"] .rf-course        { animation: none; stroke-dashoffset: 0; }
  [data-design="b"] .rf-rake          { animation: none; stroke-dashoffset: 0; }
  [data-design="b"] .rf-hero__plane   { animation: none; opacity: 0.22; }

  [data-design="b"] .rf-cta           { animation: none; }
  [data-design="b"] .rf-cta::after,
  [data-design="b"] .rf-cta__arrow    { transition: none; }

  [data-design="b"] .fw-pointer__rule,
  [data-design="b"] .fw-pointer__label { animation: none; opacity: 0.7; }

  [data-design="b"] .rf-funnel__pour  { transition: none; }
  [data-design="b"] .rf-funnel__done  { animation: none; }

  [data-design="b"] .rf-ambient-a__cut { animation-play-state: paused; transform: scaleX(1); opacity: 0.12; }
  [data-design="b"] .rf-ambient-b__slab,
  [data-design="b"] .rf-ambient-b__aggregate { animation-play-state: paused; }
  [data-design="b"] .rf-footer__draw  { animation: none; opacity: 0.2; transform: scaleX(1); }
}

/* =============================================================
   RESPONSIVE — 768px tablet
   ============================================================= */
@media (max-width: 768px) {
  [data-design="b"] .rf-header__bar { padding: 16px; }
  [data-design="b"] .rf-hero { padding: 72px 16px 64px; min-height: 100svh; }
  [data-design="b"] .rf-ambient-a { padding: 56px 16px; }
  [data-design="b"] .rf-ambient-b { padding: 56px 16px; }
  [data-design="b"] .rf-service-area { padding: 56px 16px; }
  [data-design="b"] .rf-repeat-cta  { padding: 72px 16px; }
  [data-design="b"] .rf-interactive { padding: 56px 16px; }
  [data-design="b"] .rf-funnel__title-block { grid-template-columns: 40px 1fr auto; padding: var(--fw-board); }
  [data-design="b"] .rf-funnel__field { padding: var(--fw-board); }
  [data-design="b"] .rf-funnel__actions { padding: 0 var(--fw-board) var(--fw-board); }
  [data-design="b"] .rf-services__row { grid-template-columns: 40px 1fr; grid-template-rows: auto auto; }
  [data-design="b"] .rf-services__desc { grid-column: 2; }
  [data-design="b"] .rf-footer { padding: 48px 16px 32px; }
}

/* =============================================================
   RESPONSIVE — 560px phone
   ============================================================= */
@media (max-width: 560px) {
  [data-design="b"] .rf-logo__mark { font-size: 17px; }
  [data-design="b"] .rf-hero__headline { font-size: clamp(32px,9vw,52px); }
  [data-design="b"] .rf-hero__ctas { flex-direction: column; align-items: flex-start; }
  [data-design="b"] .rf-cta { width: 100%; justify-content: space-between; }
  [data-design="b"] .rf-funnel__choices { grid-template-columns: 1fr; }
  [data-design="b"] .rf-services__row { grid-template-columns: 1fr; }
  [data-design="b"] .rf-services__num { display: none; }
  [data-design="b"] .rf-process__phases { grid-template-columns: 1fr; }
}

/* =============================================================
   MOBILE NO-HSCROLL GUARD (hard contract — appended last)
   ============================================================= */
[data-design="b"].dq-design,
[data-design="b"] .dq-design { max-width: 100%; overflow-x: clip; }
[data-design="b"] * { min-width: 0; }
[data-design="b"] img,
[data-design="b"] 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; }