/* =====================================================================
   DESIGN B — Cotter Construction
   Tracciato grammar, blueprint-negative (dark-paper) variant.
   Distinct from a canonical cream Tracciato: night drafting room.
   All selectors scoped [data-design="b"]; keyframes prefixed b-.
   ===================================================================== */

[data-design="b"] {
  /* --- color: blueprint-negative variant --- */
  --paper:        #16201F;   /* dark slate-teal drafting ground */
  --paper-deep:   #101918;
  --marmo:        #1E2A29;   /* plate surface, lifted off the ground */
  --ink:          #ECE7DA;   /* light grafite — body type, hairlines */
  --ink-soft:     #C3BEB1;
  --pencil:       #8C9A98;   /* annotation grey */
  --pencil-trace: #4A5856;
  --ottanio:      #57B6C9;   /* brightened Scarpa teal — signature accent */
  --ottanio-deep: #3E97A9;
  --ottone:       #C9985E;   /* brass */
  --ottone-warm:  #E0B987;
  --rule:         #33433F;
  --critical:     #C9603F;
  --success:      #7FA86B;

  /* --- exposed contract token --- */
  --design-b-primary: var(--ottanio);

  /* --- type --- */
  --font-display:    "Cormorant Garamond", "EB Garamond", "Iowan Old Style", Georgia, serif;
  --font-body:       "Cormorant Garamond", "EB Garamond", "Iowan Old Style", Georgia, serif;
  --font-annotation: "JetBrains Mono", ui-monospace, "Menlo", monospace;

  --t-mono-xs: clamp(10px, 0.65vw + 8px, 12px);
  --t-mono-sm: clamp(12px, 0.8vw + 10px, 14px);
  --t-body:    clamp(16px, 0.4vw + 14px, 19px);
  --t-lead:    clamp(19px, 0.7vw + 16px, 24px);
  --t-h3:      clamp(22px, 1.0vw + 18px, 30px);
  --t-h2:      clamp(30px, 2.2vw + 18px, 56px);
  --t-h1:      clamp(40px, 4.5vw + 22px, 88px);

  /* --- spacing (4px module) --- */
  --gap-hairline: 4px;  --gap-tick: 8px;  --gap-line: 12px;
  --gap-stanza: 20px;   --gap-cell: 32px; --gap-rule: 48px;
  --gap-bay: clamp(64px, 8vw, 96px);  --gap-court: 128px;
  --measure: 66ch;

  /* --- motion --- */
  --dur-trace: 1200ms; --dur-settle: 420ms; --dur-stamp: 180ms;
  --dur-register: 600ms; --dur-breath: 4500ms;
  --ease-pen:    cubic-bezier(0.65, 0, 0.35, 1);
  --ease-settle: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-stamp:  cubic-bezier(0.5, 0, 0.85, 0.4);
  --ease-vellum: cubic-bezier(0.4, 0, 0.6, 1);

  --r-tick: 1px; --r-stamp: 3px; --r-mark: 50%;

  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--t-body);
  line-height: 1.6;
}
[data-design="b"] *, [data-design="b"] *::before, [data-design="b"] *::after { box-sizing: border-box; }

/* shared type atoms */
[data-design="b"] .rf-eyebrow {
  font-family: var(--font-annotation); font-size: var(--t-mono-sm);
  color: var(--ottone); text-transform: uppercase; letter-spacing: 0.18em;
  margin: 0 0 var(--gap-tick);
}
[data-design="b"] .rf-h1 {
  font-family: var(--font-display); font-size: var(--t-h1);
  letter-spacing: -0.01em; line-height: 1.02; color: var(--ink); margin: 0;
  font-weight: 500;
}
[data-design="b"] .rf-h2 {
  font-family: var(--font-display); font-size: var(--t-h2);
  letter-spacing: -0.01em; line-height: 1.05; color: var(--ink);
  margin: 0 0 var(--gap-line); font-weight: 500;
}
[data-design="b"] .rf-lede {
  font-family: var(--font-body); font-size: var(--t-lead);
  color: var(--ink-soft); line-height: 1.45; margin: 0; max-width: var(--measure);
}

/* ============ 1. HEADER ============ */
[data-design="b"].rf-header, [data-design="b"] .rf-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--paper); border-bottom: 1px solid var(--rule);
}
[data-design="b"] .rf-header__bar {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; padding: 0 clamp(16px, 4vw, 48px); position: relative; z-index: 2;
}
[data-design="b"] .rf-logo {
  font-family: var(--font-display); font-size: clamp(20px, 1.4vw + 14px, 26px);
  letter-spacing: -0.01em; color: var(--ink); text-decoration: none;
  font-weight: 500; line-height: 1;
}
[data-design="b"] .rf-hamburger {
  appearance: none; background: transparent; border: 1px solid var(--rule);
  border-radius: var(--r-tick); width: 46px; height: 38px; padding: 9px 10px;
  display: inline-flex; flex-direction: column; justify-content: space-between;
  cursor: pointer; transition: border-color var(--dur-stamp) var(--ease-stamp);
}
[data-design="b"] .rf-hamburger:hover { border-color: var(--ink); }
[data-design="b"] .rf-hamburger:focus-visible { outline: 2px solid var(--ottanio); outline-offset: 2px; }
[data-design="b"] .rf-hamburger__rule { display: block; height: 1px; background: var(--ink); }
[data-design="b"] .rf-hamburger__rule:nth-child(2) { width: 75%; }
[data-design="b"] .rf-hamburger__rule:nth-child(3) { width: 90%; }

[data-design="b"] .rf-dimstring {
  position: absolute; left: clamp(16px, 4vw, 48px); right: clamp(16px, 4vw, 48px);
  bottom: -1px; height: 14px; display: flex; align-items: center; gap: 6px;
  pointer-events: none; font-family: var(--font-annotation); font-size: var(--t-mono-xs);
  color: var(--ottone); letter-spacing: 0.18em; text-transform: uppercase;
}
[data-design="b"] .rf-dimstring__line {
  flex: 1 1 auto; height: 1px; background: var(--ottone);
  transform-origin: left center; transform: scaleX(0);
  animation: b-dim-extend 23s var(--ease-pen) infinite;
}
[data-design="b"] .rf-dimstring__line:nth-of-type(2) { transform-origin: right center; animation-delay: 0.3s; }
[data-design="b"] .rf-dimstring__value { opacity: 0; white-space: nowrap; animation: b-dim-value 23s var(--ease-pen) infinite; }
[data-design="b"] .rf-dimstring__tick {
  width: 8px; height: 8px; border: 1px solid var(--ottone); border-radius: var(--r-mark);
  background: var(--paper); opacity: 0; animation: b-dim-tick 23s var(--ease-pen) infinite;
}
[data-design="b"] .rf-dimstring__tick--end { animation-delay: 11.5s; }
@keyframes b-dim-extend { 0%{transform:scaleX(0);} 18%{transform:scaleX(1);} 72%{transform:scaleX(1);opacity:1;} 92%{transform:scaleX(1);opacity:0;} 100%{transform:scaleX(0);opacity:0;} }
@keyframes b-dim-value { 0%,22%{opacity:0;} 30%,70%{opacity:1;} 90%,100%{opacity:0;} }
@keyframes b-dim-tick { 0%,12%{opacity:0;} 22%{opacity:1;} 88%{opacity:1;} 96%{opacity:0;} }

/* Drawer */
[data-design="b"] .rf-drawer {
  position: fixed; inset: 0 0 0 auto; width: min(360px, 88vw);
  background: var(--marmo); border-left: 1px solid var(--ink);
  padding: 80px 32px 32px; z-index: 50;
  transform: translateX(100%); transition: transform var(--dur-register) var(--ease-settle);
}
[data-design="b"] .rf-drawer[data-open="true"] { transform: translateX(0); }
[data-design="b"] .rf-drawer__pin {
  position: absolute; left: 12px; width: 8px; height: 8px; border-radius: var(--r-mark);
  background: var(--ottone-warm); box-shadow: 0 0 0 1px var(--ottone) inset;
}
[data-design="b"] .rf-drawer__pin--top { top: 16px; }
[data-design="b"] .rf-drawer__pin--bottom { bottom: 16px; }
[data-design="b"] .rf-drawer__close {
  position: absolute; top: 14px; right: 18px; background: transparent; border: 0;
  font-size: 28px; line-height: 1; color: var(--ink); cursor: pointer;
  min-width: 44px; min-height: 44px;
}
[data-design="b"] .rf-nav { display: flex; flex-direction: column; gap: var(--gap-stanza); }
[data-design="b"] .rf-nav__link {
  font-family: var(--font-display); font-size: var(--t-h3); color: var(--ink);
  text-decoration: none; border-bottom: 1px solid var(--rule);
  padding-bottom: var(--gap-tick);
  transition: color var(--dur-stamp) var(--ease-stamp), border-color var(--dur-stamp) var(--ease-stamp);
}
[data-design="b"] .rf-nav__link:hover { color: var(--ottanio); border-color: var(--ottanio); }
[data-design="b"] .rf-nav__link--tel { font-family: var(--font-annotation); font-size: var(--t-mono-sm); letter-spacing: 0.16em; text-transform: uppercase; color: var(--ottanio); }

/* ============ HERO ============ */
[data-design="b"] .rf-hero {
  position: relative; overflow: hidden; background: var(--paper);
  padding: clamp(72px, 12vw, 140px) clamp(16px, 4vw, 48px) clamp(56px, 8vw, 96px);
}
/* ONE animated layer — ambient ottanio vellum wash (arrival + sustained drift) */
[data-design="b"] .rf-hero__wash {
  position: absolute; inset: -20% -10% -20% -10%; z-index: 0; pointer-events: none;
  background:
    radial-gradient(60% 50% at 22% 30%, rgba(87,182,201,0.30), transparent 70%),
    radial-gradient(50% 45% at 78% 68%, rgba(201,152,94,0.18), transparent 72%),
    repeating-linear-gradient(115deg, rgba(236,231,218,0.05) 0 1px, transparent 1px 56px);
  opacity: 0; transform: scale(1.04);
  animation:
    b-hero-arrive var(--dur-trace) var(--ease-settle) forwards,
    b-hero-drift 12s ease-in-out 1.2s infinite;
}
@keyframes b-hero-arrive { from { opacity: 0; transform: scale(1.06); } to { opacity: 1; transform: scale(1); } }
@keyframes b-hero-drift {
  0%,100% { background-position: 0% 0%, 0% 0%, 0 0; filter: hue-rotate(0deg); }
  50%     { background-position: 6% 4%, -5% -3%, 30px 0; filter: hue-rotate(8deg); }
}
[data-design="b"] .rf-hero__block { position: relative; z-index: 1; max-width: 980px; }
[data-design="b"] .rf-hero__title { margin: 0 0 var(--gap-stanza); max-width: 16ch; }
[data-design="b"] .rf-hero__lede { margin: 0 0 var(--gap-cell); }
[data-design="b"] .rf-hero__cta { margin-top: var(--gap-stanza); }

[data-design="b"] .rf-titleblock {
  position: relative; display: inline-grid; gap: 6px;
  padding: 16px 20px; margin-bottom: var(--gap-stanza);
  border: 1px solid var(--rule); background: var(--marmo);
}
[data-design="b"] .rf-titleblock__corner {
  position: absolute; width: 12px; height: 12px; border: 1.5px solid var(--ottone);
}
[data-design="b"] .rf-titleblock__corner--tl { top: -6px; left: -6px; border-right: 0; border-bottom: 0; }
[data-design="b"] .rf-titleblock__corner--br { bottom: -6px; right: -6px; border-left: 0; border-top: 0; }
[data-design="b"] .rf-titleblock__row { display: flex; gap: var(--gap-cell); justify-content: space-between; font-family: var(--font-annotation); font-size: var(--t-mono-xs); letter-spacing: 0.14em; text-transform: uppercase; }
[data-design="b"] .rf-titleblock__key { color: var(--pencil); }
[data-design="b"] .rf-titleblock__val { color: var(--ink); }

/* ============ 2. CTA (stamp) ============ */
[data-design="b"] .rf-cta {
  position: relative; display: inline-flex; align-items: center; gap: var(--gap-tick);
  padding: 15px 24px; min-height: 44px; background: var(--ottanio); color: #08201F;
  font-family: var(--font-annotation); font-size: var(--t-mono-sm); text-transform: uppercase;
  letter-spacing: 0.18em; text-decoration: none; border-radius: var(--r-stamp);
  isolation: isolate;
  transition: background-color var(--dur-stamp) var(--ease-stamp), transform var(--dur-stamp) var(--ease-stamp);
  animation: b-cta-breath var(--dur-breath) ease-in-out infinite;
}
[data-design="b"] .rf-cta__label { line-height: 1; }
[data-design="b"] .rf-cta__arrow { display: inline-flex; color: #08201F; transform: translateX(0); transition: transform var(--dur-settle) var(--ease-pen); }
[data-design="b"] .rf-cta__corner {
  position: absolute; width: 14px; height: 14px; border: 1.5px solid var(--ottone); pointer-events: none;
  transition: transform var(--dur-register) var(--ease-pen), border-color var(--dur-stamp) var(--ease-stamp);
}
[data-design="b"] .rf-cta__corner--tl { top: -10px; left: -10px; border-right: 0; border-bottom: 0; transform: translate(-2px,-2px); }
[data-design="b"] .rf-cta__corner--br { bottom: -10px; right: -10px; border-left: 0; border-top: 0; transform: translate(2px,2px); }
[data-design="b"] .rf-cta:hover, [data-design="b"] .rf-cta:focus-visible { outline: none; background: var(--ottanio); }
[data-design="b"] .rf-cta:hover .rf-cta__corner, [data-design="b"] .rf-cta:focus-visible .rf-cta__corner { transform: translate(0,0); border-color: var(--ottone-warm); }
[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(--ottanio); outline-offset: 4px; }
[data-design="b"] .rf-cta:active { background: var(--ottanio-deep); transform: translateY(1px); }
@keyframes b-cta-breath { 0%,100%{ transform: translateY(0);} 50%{ transform: translateY(-1px);} }

/* ============ 6. POINTER ============ */
[data-design="b"] .rf-pointer {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--ottone);
  padding: clamp(40px, 8vw, 72px) 16px clamp(48px, 9vw, 88px);
}
[data-design="b"] .rf-pointer__tick { display: block; width: 16px; height: 1px; background: currentColor; opacity: 0.8; }
[data-design="b"] .rf-pointer__rule {
  display: block; width: 1px; height: 56px; background: currentColor;
  transform-origin: top center; animation: b-pointer-extend 5s ease-in-out infinite;
}
[data-design="b"] .rf-pointer__label {
  font-family: var(--font-annotation); font-size: 11px; letter-spacing: 0.2em;
  text-transform: uppercase; opacity: 0; animation: b-pointer-stamp 5s ease-in-out infinite;
}
@keyframes b-pointer-extend { 0%,100%{ transform: scaleY(0.4); opacity: 0.5; } 50%{ transform: scaleY(1); opacity: 0.9; } }
@keyframes b-pointer-stamp { 0%,30%,100%{ opacity: 0; } 50%,70%{ opacity: 0.9; } }

/* ============ 5. FUNNEL ============ */
[data-design="b"] .rf-interactive {
  padding: var(--gap-bay) clamp(16px, 4vw, 48px); background: var(--paper);
  display: grid; gap: var(--gap-rule);
}
[data-design="b"] .rf-funnel__head { max-width: var(--measure); }
[data-design="b"] .rf-funnel { max-width: 720px; margin-inline: auto; width: 100%; }
[data-design="b"] .rf-funnel__progress {
  display: flex; align-items: center; gap: var(--gap-cell); margin-bottom: var(--gap-rule);
  font-family: var(--font-annotation); font-size: var(--t-mono-sm); color: var(--ottone);
  text-transform: uppercase; letter-spacing: 0.18em;
}
[data-design="b"] .rf-funnel__progress-line { flex: 1 1 auto; height: 1px; background: var(--rule); position: relative; overflow: hidden; }
[data-design="b"] .rf-funnel__progress-fill {
  position: absolute; inset: 0 auto 0 0; width: 20%; background: var(--ottone);
  transform-origin: left center; transition: width var(--dur-trace) var(--ease-pen);
}
[data-design="b"] .rf-funnel__plate {
  position: relative; background: var(--marmo); border: 1px solid var(--ink);
  padding: clamp(20px, 3vw, 40px); min-height: 360px; isolation: isolate;
}
[data-design="b"] .rf-funnel__plate::before, [data-design="b"] .rf-funnel__plate::after {
  content: ""; position: absolute; width: 8px; height: 8px;
  background: var(--ottone-warm); border: 1px solid var(--ottone); border-radius: var(--r-mark);
}
[data-design="b"] .rf-funnel__plate::before { top: 10px; left: 10px; }
[data-design="b"] .rf-funnel__plate::after { bottom: 10px; right: 10px; }
[data-design="b"] .rf-funnel__step {
  border: 0; padding: 0; margin: 0; display: none; opacity: 0; transform: translateY(8px);
  transition: opacity var(--dur-settle) var(--ease-settle), transform var(--dur-settle) var(--ease-settle);
}
[data-design="b"] .rf-funnel__step[data-active="true"] { display: block; }
[data-design="b"] .rf-funnel__step.is-settled { opacity: 1; transform: translateY(0); }
[data-design="b"] .rf-funnel__legend {
  font-family: var(--font-display); font-size: var(--t-h3); letter-spacing: -0.01em;
  color: var(--ink); margin-bottom: var(--gap-stanza); font-weight: 500;
}
[data-design="b"] .rf-funnel__choices { display: grid; gap: var(--gap-tick); margin-bottom: var(--gap-cell); }
[data-design="b"] .rf-choice {
  display: flex; align-items: center; gap: var(--gap-tick); padding: 14px 18px; min-height: 44px;
  border: 1px solid var(--rule); background: var(--paper); cursor: pointer;
  font-family: var(--font-body); font-size: var(--t-body); color: var(--ink);
  transition: border-color var(--dur-stamp) var(--ease-stamp), background-color var(--dur-stamp) var(--ease-stamp);
}
[data-design="b"] .rf-choice:hover { border-color: var(--ink); }
[data-design="b"] .rf-choice input[type="radio"] {
  appearance: none; width: 16px; height: 16px; border: 1px solid var(--ink);
  background: var(--marmo); border-radius: var(--r-mark); margin: 0; flex-shrink: 0; cursor: pointer;
}
[data-design="b"] .rf-choice input:checked { background: var(--ottanio); border-color: var(--ottanio); box-shadow: inset 0 0 0 3px var(--marmo); }
[data-design="b"] .rf-choice:has(input:checked) { border-color: var(--ottanio); background: var(--paper-deep); box-shadow: inset 0 -2px 0 var(--ottanio); }

[data-design="b"] .rf-funnel__field { display: grid; gap: var(--gap-tick); margin-bottom: var(--gap-stanza); }
[data-design="b"] .rf-funnel__label {
  font-family: var(--font-annotation); font-size: var(--t-mono-sm); color: var(--pencil);
  text-transform: uppercase; letter-spacing: 0.18em;
}
[data-design="b"] .rf-funnel__input, [data-design="b"] .rf-funnel__textarea {
  width: 100%; background: var(--paper); border: 0; border-bottom: 1px solid var(--ink);
  border-radius: 0; padding: 11px 4px; font-family: var(--font-body); font-size: var(--t-body);
  color: var(--ink); outline: none;
  transition: border-color var(--dur-stamp) var(--ease-stamp); resize: vertical;
}
[data-design="b"] .rf-funnel__input:focus, [data-design="b"] .rf-funnel__textarea:focus { border-bottom: 2px solid var(--ottanio); padding-bottom: 10px; }
[data-design="b"] .rf-funnel__input.is-touched, [data-design="b"] .rf-funnel__textarea.is-touched { border-bottom-color: var(--ottanio); }

[data-design="b"] .rf-funnel__nav {
  display: flex; justify-content: space-between; align-items: center; gap: var(--gap-tick);
  margin-top: var(--gap-cell); padding-top: var(--gap-stanza); border-top: 1px solid var(--rule);
}
[data-design="b"] .rf-funnel__btn {
  appearance: none; font-family: var(--font-annotation); font-size: var(--t-mono-sm);
  text-transform: uppercase; letter-spacing: 0.18em; padding: 13px 24px; min-height: 44px;
  border-radius: var(--r-stamp); cursor: pointer;
  transition: background-color var(--dur-stamp) var(--ease-stamp), color var(--dur-stamp) var(--ease-stamp),
              border-color var(--dur-stamp) var(--ease-stamp), transform var(--dur-stamp) var(--ease-stamp);
}
[data-design="b"] .rf-funnel__btn--primary { background: var(--ottanio); color: #08201F; border: 1px solid var(--ottanio); }
[data-design="b"] .rf-funnel__btn--primary:hover { background: var(--ottanio-deep); }
[data-design="b"] .rf-funnel__btn--primary:active { transform: translateY(1px); }
[data-design="b"] .rf-funnel__btn--ghost { background: transparent; color: var(--ink); border: 1px solid var(--ink); }
[data-design="b"] .rf-funnel__btn--ghost:hover { background: var(--paper-deep); }
[data-design="b"] .rf-funnel__btn:disabled { color: var(--pencil-trace); border-color: var(--pencil-trace); cursor: not-allowed; }
[data-design="b"] .rf-funnel__btn:focus-visible { outline: 2px solid var(--ottanio); outline-offset: 2px; }

[data-design="b"] .rf-funnel__step--done { text-align: center; }
[data-design="b"] .rf-funnel__stamp {
  display: inline-flex; align-items: center; justify-content: center;
  margin: var(--gap-cell) auto var(--gap-stanza); padding: 14px 28px;
  border: 2px solid var(--ottanio); color: var(--ottanio); font-family: var(--font-annotation);
  font-size: var(--t-mono-sm); text-transform: uppercase; letter-spacing: 0.24em;
  transform: rotate(-3deg); background: var(--marmo); position: relative;
}
[data-design="b"] .rf-funnel__done-copy { font-family: var(--font-body); font-size: var(--t-lead); color: var(--ink-soft); margin: 0 auto; max-width: var(--measure); }
[data-design="b"] .rf-funnel__foot {
  font-family: var(--font-annotation); font-size: var(--t-mono-sm); color: var(--pencil);
  letter-spacing: 0.08em; text-align: center; max-width: var(--measure); margin: 0 auto;
}
[data-design="b"] .rf-funnel__foot a { color: var(--ottanio); text-decoration: none; }
[data-design="b"] .rf-funnel__foot a:hover { text-decoration: underline; }

/* ============ 4. AMBIENT B — vellum drift ============ */
[data-design="b"] .rf-ambient-b {
  padding: var(--gap-bay) clamp(16px, 4vw, 48px); background: var(--paper-deep);
  display: grid; gap: var(--gap-rule);
}
[data-design="b"] .rf-ambient-b__head { max-width: var(--measure); }
[data-design="b"] .rf-vellum-stack {
  position: relative; width: 100%; max-width: 880px; margin: 0 auto;
  aspect-ratio: 4 / 3; isolation: isolate; color: var(--ottanio);
}
[data-design="b"] .rf-vellum { position: absolute; inset: 0; border: 1px solid var(--ink); }
[data-design="b"] .rf-vellum--plate { background: var(--marmo); overflow: hidden; display: grid; place-items: center; }
[data-design="b"] .rf-vellum__draw { width: 86%; height: auto; max-width: 86%; display: block; opacity: 0.7; }
[data-design="b"] .rf-vellum--sheet {
  background: rgba(22,32,31,0.45); display: flex; align-items: flex-end; padding: 18px 22px;
}
[data-design="b"] .rf-vellum--sheet::before { content: ""; position: absolute; inset: 6px; border: 1px dashed var(--pencil-trace); pointer-events: none; }
[data-design="b"] .rf-vellum__label {
  font-family: var(--font-annotation); font-size: var(--t-mono-sm); text-transform: uppercase;
  letter-spacing: 0.2em; color: var(--ink); background: var(--marmo); padding: 4px 10px; border: 1px solid var(--ink);
}
[data-design="b"] .rf-vellum--01 { animation: b-vellum-1 16s var(--ease-vellum) infinite; }
[data-design="b"] .rf-vellum--02 { animation: b-vellum-2 19s var(--ease-vellum) infinite; animation-delay: -3s; }
[data-design="b"] .rf-vellum--03 { animation: b-vellum-3 23s var(--ease-vellum) infinite; animation-delay: -7s; }
@keyframes b-vellum-1 { 0%,100%{ transform: translate(-3%,-2%) rotate(-0.6deg); opacity: 0.85; } 50%{ transform: translate(2%,1%) rotate(0.4deg); opacity: 0.5; } }
@keyframes b-vellum-2 { 0%,100%{ transform: translate(2%,2%) rotate(0.5deg); opacity: 0.7; } 50%{ transform: translate(-2%,-1%) rotate(-0.4deg); opacity: 0.92; } }
@keyframes b-vellum-3 { 0%,100%{ transform: translate(0,-1%) rotate(0.2deg); opacity: 0.55; } 50%{ transform: translate(1%,2%) rotate(-0.3deg); opacity: 0.8; } }
[data-design="b"] .rf-vellum-stack[data-paused="true"] .rf-vellum--sheet { animation-play-state: paused; }
[data-design="b"] .rf-ambient-b__cta { display: flex; justify-content: center; }

/* ============ 3. AMBIENT A — section detail ============ */
[data-design="b"] .rf-ambient-a {
  padding: var(--gap-bay) clamp(16px, 4vw, 48px); background: var(--paper);
  display: grid; gap: var(--gap-rule); grid-template-columns: minmax(0,1fr);
  color: var(--ottanio);
}
@media (min-width: 900px) {
  [data-design="b"] .rf-ambient-a { grid-template-columns: 320px minmax(0,1fr); align-items: start; }
}
[data-design="b"] .rf-ambient-a__head { max-width: var(--measure); }
[data-design="b"] .rf-detail { position: relative; margin: 0; padding: 24px; background: var(--marmo); border: 1px solid var(--ink); max-width: 100%; color: var(--ink); }
[data-design="b"] .rf-detail__drawing { width: 100%; height: auto; max-width: 100%; display: block; }
[data-design="b"] .rf-callout {
  position: absolute; display: flex; align-items: center; gap: 6px;
  font-family: var(--font-annotation); font-size: var(--t-mono-xs); text-transform: uppercase;
  letter-spacing: 0.16em; color: var(--ink); opacity: 0;
  transition: opacity var(--dur-trace) var(--ease-pen) calc(var(--rf-cb-delay,0) * 1ms);
}
[data-design="b"] .rf-callout__leader {
  display: block; height: 1px; background: var(--ottone); width: 0;
  transition: width var(--dur-trace) var(--ease-pen) calc(var(--rf-cb-delay,0) * 1ms);
}
[data-design="b"] .rf-callout__pill { white-space: nowrap; padding: 2px 8px; background: var(--marmo); border: 1px solid var(--ink); border-radius: var(--r-tick); }
[data-design="b"] .rf-callout--01 { top: 6%; left: 4%; --rf-cb-delay: 0; }
[data-design="b"] .rf-callout--02 { top: 26%; right: 4%; --rf-cb-delay: 220; flex-direction: row-reverse; }
[data-design="b"] .rf-callout--03 { top: 50%; left: 4%; --rf-cb-delay: 440; }
[data-design="b"] .rf-callout--04 { bottom: 18%; right: 4%; --rf-cb-delay: 660; flex-direction: row-reverse; }
[data-design="b"] .rf-callout--05 { bottom: 2%; left: 4%; --rf-cb-delay: 880; }
[data-design="b"] .rf-detail.is-traced .rf-callout { opacity: 1; }
[data-design="b"] .rf-detail.is-traced .rf-callout__leader { width: 70px; }
[data-design="b"] .rf-detail.is-traced .rf-callout--03 .rf-callout__pill { animation: b-callout-confirm 14s var(--ease-vellum) infinite; }
@keyframes b-callout-confirm { 0%,88%{ background: var(--marmo); color: var(--ink); } 92%{ background: var(--ottanio); color: #08201F; } 100%{ background: var(--marmo); color: var(--ink); } }

/* ============ Scope of work ============ */
[data-design="b"] .rf-scope { padding: var(--gap-bay) clamp(16px, 4vw, 48px); background: var(--paper-deep); display: grid; gap: var(--gap-rule); }
[data-design="b"] .rf-scope__head { max-width: var(--measure); }
[data-design="b"] .rf-scope__list { list-style: none; margin: 0; padding: 0; max-width: 880px; }
[data-design="b"] .rf-scope__row {
  display: flex; align-items: baseline; gap: var(--gap-cell);
  padding: var(--gap-stanza) 0; border-top: 1px solid var(--rule);
}
[data-design="b"] .rf-scope__row:last-child { border-bottom: 1px solid var(--rule); }
[data-design="b"] .rf-scope__num { font-family: var(--font-annotation); font-size: var(--t-mono-sm); color: var(--pencil); letter-spacing: 0.14em; }
[data-design="b"] .rf-scope__title { font-family: var(--font-display); font-size: var(--t-h3); color: var(--ink); }

/* ============ Footer ============ */
[data-design="b"] .rf-footer { background: var(--paper-deep); border-top: 1px solid var(--rule); padding: var(--gap-bay) clamp(16px, 4vw, 48px) var(--gap-cell); }
[data-design="b"] .rf-footer__row { display: flex; flex-wrap: wrap; gap: var(--gap-cell); align-items: center; justify-content: space-between; }
[data-design="b"] .rf-footer__firm, [data-design="b"] .rf-footer__dim { font-family: var(--font-annotation); font-size: var(--t-mono-sm); letter-spacing: 0.16em; color: var(--pencil); margin: 0; }
[data-design="b"] .rf-footer__links { display: flex; flex-wrap: wrap; gap: var(--gap-stanza); }
[data-design="b"] .rf-footer__links a { font-family: var(--font-annotation); font-size: var(--t-mono-sm); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ottanio); text-decoration: none; }
[data-design="b"] .rf-footer__links a:hover { text-decoration: underline; }
[data-design="b"] .rf-footer__legal { font-family: var(--font-annotation); font-size: var(--t-mono-xs); color: var(--pencil-trace); letter-spacing: 0.12em; margin: var(--gap-cell) 0 0; }

/* ============ Reduced motion ============ */
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-dimstring__line, [data-design="b"] .rf-dimstring__value, [data-design="b"] .rf-dimstring__tick { animation: none; transform: scaleX(1); opacity: 1; }
  [data-design="b"] .rf-drawer { transition: none; }
  [data-design="b"] .rf-hero__wash { animation: none; opacity: 1; transform: none; }
  [data-design="b"] .rf-cta { animation: none; }
  [data-design="b"] .rf-cta__corner, [data-design="b"] .rf-cta__arrow { transition: none; }
  [data-design="b"] .rf-pointer__rule, [data-design="b"] .rf-pointer__label { animation: none; opacity: 0.85; }
  [data-design="b"] .rf-vellum--sheet { animation: none; }
  [data-design="b"] .rf-vellum--01 { transform: translate(-3%,-2%) rotate(-0.6deg); opacity: 0.7; }
  [data-design="b"] .rf-vellum--02 { transform: translate(2%,1%) rotate(0.4deg); opacity: 0.7; }
  [data-design="b"] .rf-vellum--03 { transform: translate(0,0) rotate(0deg); opacity: 0.7; }
  [data-design="b"] .rf-callout, [data-design="b"] .rf-callout__leader { transition: none; opacity: 1; }
  [data-design="b"] .rf-callout__leader { width: 70px; }
  [data-design="b"] .rf-detail .rf-callout--03 .rf-callout__pill { animation: none; }
  [data-design="b"] .rf-funnel__step, [data-design="b"] .rf-funnel__progress-fill, [data-design="b"] .rf-funnel__input, [data-design="b"] .rf-funnel__textarea, [data-design="b"] .rf-funnel__btn, [data-design="b"] .rf-choice { transition: none; }
  [data-design="b"] .rf-funnel__step[data-active="true"] { opacity: 1; transform: none; }
}

/* ============ Breakpoints ============ */
@media (max-width: 560px) {
  [data-design="b"] .rf-header__bar { height: 56px; }
  [data-design="b"] .rf-dimstring__value { display: none; }
  [data-design="b"] .rf-callout__leader { display: none; }
  [data-design="b"] .rf-callout--02, [data-design="b"] .rf-callout--04 { flex-direction: row; }
  [data-design="b"] .rf-vellum-stack { aspect-ratio: 1 / 1; }
  [data-design="b"] .rf-vellum__label { font-size: var(--t-mono-xs); }
  [data-design="b"] .rf-funnel__progress { flex-direction: column; align-items: flex-start; gap: 6px; }
  [data-design="b"] .rf-funnel__progress-line { width: 100%; }
  [data-design="b"] .rf-funnel__nav { flex-direction: column-reverse; align-items: stretch; }
  [data-design="b"] .rf-funnel__btn { width: 100%; }
  [data-design="b"] .rf-titleblock { display: grid; width: 100%; }
}
@media (max-width: 380px) {
  [data-design="b"] .rf-logo { font-size: 17px; }
}

/* ============ Mobile h-scroll guard (REQUIRED, appended at bottom) ============ */
[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; }