/* ============================================================
   DESIGN B — "Exposed Systems", blueprint-negative register
   Slot-scoped [data-design="b"]. Remapped from the exposed-systems source design.
   Distinct from Site A: dark blueprint field, cyan guides, safety-orange accent.
   ============================================================ */

[data-design="b"] {
  /* --- tokens (12-16 trade-rooted; blueprint-negative variant) --- */
  --ink:            #EAF0F4;   /* light text on dark field */
  --ink-2:          #B7C2CC;   /* secondary text */
  --paper:          #0F1A22;   /* deep blueprint navy — page bg */
  --paper-2:        #16242E;   /* drawing-sheet panel bg */
  --rule:           #2E4250;   /* hairline grid / borders */
  --guide:          #4FB3D9;   /* drafting cyan construction lines */
  --muted:          #7E909C;   /* captions, sheet-numbers */
  --sys-structural: #FF7A2F;   /* safety-orange — primary accent + stamps */
  --sys-mechanical: #4FB3D9;   /* blueprint cyan — secondary */
  --sys-electrical: #59C77A;   /* approval green */
  --sys-ventilation:#F4C04A;   /* caution amber */
  --critical:       #E2452B;
  --success:        var(--sys-electrical);

  /* expose the slot primary */
  --design-b-primary: var(--sys-structural);

  --font-display: "Inter Tight", "Helvetica Now Display", -apple-system, system-ui, sans-serif;
  --font-body:    "Inter", -apple-system, system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --font-stamp:   "Times New Roman", Times, serif;

  --ease-snap:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-draft: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast:   160ms;
  --dur-base:   320ms;
  --dur-draw:   1400ms;

  --r-0: 0;
  --r-1: 2px;
  --r-2: 4px;

  --gap-block: 24px;
  --gap-section: 96px;
  --gap-section-m: 64px;
  --gap-section-s: 48px;

  --elev-drawer: 0 0 0 1px var(--guide), 0 24px 64px -32px rgba(0,0,0,0.7);

  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}

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

/* ===== ELEMENT 1 — HEADER ===== */
[data-design="b"] .rf-header { position: relative; background: var(--paper); border-bottom: 1px solid var(--rule); }
[data-design="b"] .rf-header__bar { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 16px clamp(16px, 4vw, 40px); }
[data-design="b"] .rf-logo { display: inline-flex; gap: 10px; align-items: center; text-decoration: none; color: var(--ink); font-family: var(--font-display); font-weight: 600; font-size: clamp(15px, 3.4vw, 18px); letter-spacing: -0.01em; }
[data-design="b"] .rf-logo__mark { display: inline-flex; color: var(--sys-structural); }
[data-design="b"] .rf-burger { display: inline-flex; flex-direction: column; gap: 5px; padding: 12px; background: transparent; border: 1px solid var(--ink); border-radius: 0; cursor: pointer; transition: background var(--dur-fast) var(--ease-snap); min-width: 44px; min-height: 44px; align-items: center; justify-content: center; }
[data-design="b"] .rf-burger__line { display: block; width: 22px; height: 1.5px; background: var(--ink); transition: background var(--dur-fast) var(--ease-snap); }
[data-design="b"] .rf-burger:hover { background: var(--sys-structural); border-color: var(--sys-structural); }
[data-design="b"] .rf-burger:hover .rf-burger__line { background: var(--paper); }
[data-design="b"] .rf-burger:focus-visible { outline: 2px solid var(--sys-structural); outline-offset: 2px; }

[data-design="b"] .rf-header__atmos { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 1; opacity: 0.22; }
[data-design="b"] .rf-header__atmos line,
[data-design="b"] .rf-header__atmos circle { fill: var(--guide); stroke: var(--guide); stroke-width: 1; stroke-linecap: square; vector-effect: non-scaling-stroke; stroke-dasharray: 200; stroke-dashoffset: 200; animation: b-header-draw 28s var(--ease-draft) infinite; }
[data-design="b"] .rf-header__atmos circle { fill: var(--guide); stroke: none; }
[data-design="b"] .rf-header__dim { stroke: var(--sys-structural); }
[data-design="b"] .rf-header__dimlabel { fill: var(--sys-structural); font-family: var(--font-mono); font-size: 8px; letter-spacing: 0.08em; opacity: 0; animation: b-header-label 28s var(--ease-snap) infinite; }

@keyframes b-header-draw {
  0%   { stroke-dashoffset: 200; opacity: 0; }
  18%  { stroke-dashoffset: 0; opacity: 1; }
  72%  { stroke-dashoffset: 0; opacity: 1; }
  86%  { stroke-dashoffset: 0; opacity: 0; }
  100% { stroke-dashoffset: 200; opacity: 0; }
}
@keyframes b-header-label {
  0%, 24% { opacity: 0; }
  28%, 70% { opacity: 1; }
  84%, 100% { opacity: 0; }
}

/* drawer */
[data-design="b"] .rf-drawer { position: fixed; inset: 0; background: rgba(8,14,18,0.62); z-index: 50; display: flex; justify-content: flex-end; opacity: 0; pointer-events: none; transition: opacity var(--dur-base) var(--ease-snap); }
[data-design="b"] .rf-drawer[data-open="true"] { opacity: 1; pointer-events: auto; }
[data-design="b"] .rf-drawer__sheet { width: min(440px, 100vw); height: 100%; background: var(--paper-2); box-shadow: var(--elev-drawer); padding: clamp(20px, 4vw, 40px); transform: translateX(24px); transition: transform var(--dur-base) var(--ease-snap); display: flex; flex-direction: column; gap: 28px; overflow-y: auto; }
[data-design="b"] .rf-drawer[data-open="true"] .rf-drawer__sheet { transform: translateX(0); }
[data-design="b"] .rf-drawer__title { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px solid var(--guide); padding-bottom: 10px; font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-2); }
[data-design="b"] .rf-drawer__nav { display: flex; flex-direction: column; gap: 16px; }
[data-design="b"] .rf-drawer__nav .rf-nav-a { display: grid; grid-template-columns: 36px 1fr; align-items: baseline; text-decoration: none; color: var(--ink); font-family: var(--font-display); font-size: clamp(20px, 5vw, 24px); letter-spacing: -0.01em; min-height: 44px; }
[data-design="b"] .rf-drawer__nav .rf-nav-a::before { content: attr(data-no); color: var(--guide); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; }
[data-design="b"] .rf-drawer__nav .rf-nav-a:hover { color: var(--sys-structural); }
[data-design="b"] .rf-drawer__ctas { display: flex; flex-direction: column; gap: 12px; padding-top: 8px; border-top: 1px solid var(--rule); }
[data-design="b"] .rf-drawer__phone { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 12px 16px; border: 1px solid var(--guide); color: var(--guide); text-decoration: none; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; }
[data-design="b"] .rf-drawer__phone:hover { background: var(--guide); color: var(--paper); }
[data-design="b"] .rf-drawer__funnel { width: 100%; justify-content: center; }
[data-design="b"] .rf-drawer__close { align-self: flex-start; margin-top: auto; background: transparent; border: 1px solid var(--ink); padding: 12px 16px; min-height: 44px; color: var(--ink); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; cursor: pointer; border-radius: 0; }
[data-design="b"] .rf-drawer__close:hover { background: var(--ink); color: var(--paper); }

/* ===== HERO ===== */
[data-design="b"] .rf-hero { position: relative; overflow: hidden; background: var(--paper); border-bottom: 1px solid var(--rule); min-height: clamp(520px, 78vh, 760px); display: flex; align-items: center; }
[data-design="b"] .rf-hero__atmos { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
[data-design="b"] .rf-hero__draw { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.6; }
[data-design="b"] .rf-hero__ln { fill: none; stroke-width: 1.6; vector-effect: non-scaling-stroke; stroke-linecap: square; stroke-dasharray: 1400; stroke-dashoffset: 1400; animation: b-hero-draw 2s var(--ease-draft) forwards; }
[data-design="b"] .rf-hero__ln--ink { stroke: var(--rule); }
[data-design="b"] .rf-hero__ln--struct { stroke: var(--sys-structural); stroke-width: 2; }
[data-design="b"] .rf-hero__ln--mech { stroke: var(--guide); }
[data-design="b"] .rf-hero__dim { stroke: var(--muted); stroke-width: 1; vector-effect: non-scaling-stroke; stroke-dasharray: 1400; stroke-dashoffset: 1400; animation: b-hero-draw 2s var(--ease-draft) 0.3s forwards; }
[data-design="b"] .rf-hero__dimlabel { fill: var(--muted); font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.22em; opacity: 0; animation: b-hero-labelin 1s var(--ease-snap) 1.4s forwards; }
[data-design="b"] .rf-hero__flow { fill: var(--sys-structural); }   /* sustained ambient at-rest motion */

@keyframes b-hero-draw  { to { stroke-dashoffset: 0; } }
@keyframes b-hero-labelin { to { opacity: 1; } }

[data-design="b"] .rf-hero__inner { position: relative; z-index: 1; width: 100%; max-width: 1100px; margin: 0 auto; padding: clamp(56px, 9vw, 120px) clamp(16px, 5vw, 56px); }
[data-design="b"] .rf-hero__brandbar { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--guide); margin: 0 0 24px; }
[data-design="b"] .rf-hero__headline { font-family: var(--font-display); font-size: clamp(36px, 7vw, 72px); line-height: 1.08; letter-spacing: -0.025em; color: var(--ink); margin: 0 0 20px; max-width: 16ch; opacity: 1; }
[data-design="b"] .rf-hero__sub { font-size: clamp(17px, 2.4vw, 20px); line-height: 1.5; color: var(--ink-2); margin: 0 0 16px; max-width: 56ch; }
[data-design="b"] .rf-hero__proof { font-family: var(--font-mono); font-size: clamp(12px, 2.6vw, 13px); letter-spacing: 0.06em; color: var(--muted); margin: 0 0 32px; text-transform: uppercase; }
[data-design="b"] .rf-hero__actions { display: flex; flex-wrap: wrap; gap: 16px 20px; align-items: center; }
[data-design="b"] .rf-hero__chip { display: inline-flex; align-items: center; padding: 8px 14px; border: 1px solid var(--sys-structural); color: var(--sys-structural); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; }

/* ===== ELEMENT 2 — CTA ===== */
[data-design="b"] .rf-cta { position: relative; display: inline-flex; align-items: center; gap: 16px; min-height: 44px; padding: 16px 24px; background: var(--sys-structural); color: var(--paper); font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; text-decoration: none; border-radius: var(--r-1); transition: transform var(--dur-fast) var(--ease-snap), background var(--dur-fast) var(--ease-snap); overflow: hidden; }
[data-design="b"] .rf-cta::before { content: ""; position: absolute; inset: 0; border: 1px solid var(--sys-structural); border-radius: var(--r-1); pointer-events: none; }
[data-design="b"] .rf-cta__arrow { overflow: visible; flex: none; }
[data-design="b"] .rf-cta__shaft { stroke: var(--paper); stroke-width: 1.5; fill: none; stroke-dasharray: 26; stroke-dashoffset: 8; transition: stroke-dashoffset var(--dur-base) var(--ease-snap); }
[data-design="b"] .rf-cta__head  { stroke: var(--paper); stroke-width: 1.5; fill: none; stroke-linejoin: miter; transform: translateX(0); transition: transform var(--dur-base) var(--ease-snap); }
[data-design="b"] .rf-cta__rule  { position: absolute; left: 24px; right: 24px; bottom: 10px; height: 1px; background: var(--paper); opacity: 0.55; transform-origin: left; animation: b-cta-breath 4.4s ease-in-out infinite; }
[data-design="b"] .rf-cta:hover { background: #ff8b48; }
[data-design="b"] .rf-cta:hover .rf-cta__shaft { stroke-dashoffset: 0; }
[data-design="b"] .rf-cta:hover .rf-cta__head  { transform: translateX(6px); }
[data-design="b"] .rf-cta:hover .rf-cta__rule  { height: 2px; animation-play-state: paused; transform: scaleX(1); }
[data-design="b"] .rf-cta:active { transform: scale(0.985); }
[data-design="b"] .rf-cta:focus-visible { outline: 2px solid var(--guide); outline-offset: 3px; }

@keyframes b-cta-breath {
  0%, 100% { transform: scaleX(0.5); opacity: 0.4; }
  50%      { transform: scaleX(1);   opacity: 0.7; }
}

/* ===== ELEMENT 6 — POINTER (between hero & funnel) ===== */
[data-design="b"] .rf-pointer { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 40px 16px 24px; background: var(--paper); opacity: 1; }
[data-design="b"] .rf-pointer__label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }
[data-design="b"] .rf-pointer__draw { display: block; }
[data-design="b"] .rf-pointer__ext,
[data-design="b"] .rf-pointer__tick { stroke: var(--muted); stroke-width: 1.2; }
[data-design="b"] .rf-pointer__dim { stroke: var(--guide); stroke-width: 1.4; stroke-dasharray: 110; stroke-dashoffset: 110; animation: b-pointer-draw 2.6s var(--ease-draft) infinite; }
[data-design="b"] .rf-pointer__head { stroke: var(--sys-structural); stroke-width: 1.6; fill: none; stroke-linejoin: miter; opacity: 0; animation: b-pointer-head 2.6s var(--ease-snap) infinite; }

@keyframes b-pointer-draw {
  0%   { stroke-dashoffset: 110; }
  40%  { stroke-dashoffset: 0; }
  82%  { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: 0; }
}
@keyframes b-pointer-head {
  0%, 36% { opacity: 0; }
  46%, 82% { opacity: 1; }
  100% { opacity: 0.55; }
}

/* ===== ELEMENT 5 — FUNNEL ===== */
[data-design="b"] .rf-interactive { padding: var(--gap-section) clamp(16px, 4vw, 40px); background: var(--paper); border-top: 1px solid var(--sys-structural); }
[data-design="b"] .rf-funnel__masthead { max-width: 760px; margin: 0 auto 48px; }
[data-design="b"] .rf-meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; color: var(--muted); margin: 0 0 12px; text-transform: uppercase; }
[data-design="b"] .rf-h2 { font-family: var(--font-display); font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.02em; line-height: 1.1; margin: 0 0 16px; color: var(--ink); }
[data-design="b"] .rf-funnel__lede { font-size: 17px; line-height: 1.55; color: var(--ink-2); margin: 0 0 24px; max-width: 56ch; }
[data-design="b"] .rf-funnel__index { list-style: none; padding: 16px 0 0; margin: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border-top: 1px solid var(--guide); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; }
[data-design="b"] .rf-funnel__index li { display: flex; gap: 6px; align-items: baseline; flex-wrap: wrap; padding: 14px 10px; color: var(--muted); border-right: 1px solid var(--rule); }
[data-design="b"] .rf-funnel__index li:last-child { border-right: 0; }
[data-design="b"] .rf-funnel__index li span { color: var(--guide); }
[data-design="b"] .rf-funnel__index li.is-current { color: var(--ink); background: var(--paper-2); }
[data-design="b"] .rf-funnel__index li.is-done { color: var(--ink); }
[data-design="b"] .rf-funnel__index li.is-done::after { content: "✓"; margin-left: auto; color: var(--sys-electrical); }

[data-design="b"] .rf-funnel { position: relative; max-width: 760px; margin: 0 auto; min-height: 420px; }
[data-design="b"] .rf-funnel__sheet { background: var(--paper-2); border: 1px solid var(--guide); padding: 32px clamp(20px, 3vw, 40px); transition: opacity var(--dur-base) var(--ease-snap), transform var(--dur-base) var(--ease-snap); opacity: 1; transform: translateX(0); }
[data-design="b"] .rf-funnel__sheet[hidden] { display: none; }
[data-design="b"] .rf-funnel__sheet.is-leaving { opacity: 0; transform: translateX(-24px); }
[data-design="b"] .rf-funnel__sheet.is-entering { opacity: 0; transform: translateX(24px); }
[data-design="b"] .rf-funnel__title { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; padding-bottom: 16px; margin-bottom: 24px; border-bottom: 1px solid var(--guide); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; }
[data-design="b"] .rf-funnel__t { color: var(--ink); outline: none; }
[data-design="b"] .rf-funnel__title .rf-funnel__sheet-no { color: var(--muted); }
[data-design="b"] .rf-funnel fieldset { border: 0; padding: 0; margin: 0 0 32px; }
[data-design="b"] .rf-field__label { display: block; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink); margin-bottom: 16px; line-height: 1.4; }
[data-design="b"] .rf-field__opt { color: var(--muted); }
[data-design="b"] .rf-funnel__choices { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
[data-design="b"] .rf-funnel__choice { display: flex; align-items: center; gap: 12px; min-height: 44px; padding: 14px 16px; border: 1px solid var(--rule); cursor: pointer; transition: border-color var(--dur-fast) var(--ease-snap), background var(--dur-fast) var(--ease-snap); font-size: 15px; color: var(--ink); }
[data-design="b"] .rf-funnel__choice:hover { border-color: var(--guide); }
[data-design="b"] .rf-funnel__choice input { accent-color: var(--sys-structural); width: 18px; height: 18px; flex: none; }
[data-design="b"] .rf-funnel__choice:has(input:checked) { border-color: var(--sys-structural); background: rgba(255,122,47,0.10); }
[data-design="b"] .rf-funnel__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 24px; margin-bottom: 32px; }
[data-design="b"] .rf-field--wide { grid-column: 1 / -1; }
[data-design="b"] .rf-field { display: block; }
[data-design="b"] .rf-input { display: block; width: 100%; padding: 12px 14px; border: 1px solid var(--rule); background: var(--paper); font-family: var(--font-body); font-size: 16px; color: var(--ink); border-radius: var(--r-1); outline: none; transition: border-color var(--dur-fast) var(--ease-snap), box-shadow var(--dur-fast) var(--ease-snap); }
[data-design="b"] .rf-input:focus-visible { border-color: var(--sys-structural); box-shadow: inset 0 0 0 1px var(--sys-structural); }
[data-design="b"] .rf-textarea { resize: vertical; min-height: 80px; }

[data-design="b"] .rf-funnel__actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; padding-top: 24px; border-top: 1px solid var(--rule); }
[data-design="b"] .rf-funnel__actions [data-stamp] { margin-left: auto; }
[data-design="b"] .rf-funnel__actions [data-stamp][hidden] { display: none; }
[data-design="b"] .rf-btn { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 12px 18px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; border-radius: var(--r-1); cursor: pointer; transition: transform var(--dur-fast) var(--ease-snap), background var(--dur-fast) var(--ease-snap); border: 1px solid var(--guide); }
[data-design="b"] .rf-btn--primary { background: var(--sys-structural); color: var(--paper); border-color: var(--sys-structural); }
[data-design="b"] .rf-btn--primary:hover { background: #ff8b48; }
[data-design="b"] .rf-btn--secondary { background: transparent; color: var(--ink); }
[data-design="b"] .rf-btn--secondary:hover { background: var(--paper-2); }
[data-design="b"] .rf-btn:active { transform: scale(0.985); }
[data-design="b"] .rf-btn:focus-visible { outline: 2px solid var(--guide); outline-offset: 2px; }

[data-design="b"] .rf-stamp { display: inline-flex; padding: 6px 10px; border: 1.5px solid currentColor; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; transform: rotate(-2deg); animation: b-stamp 200ms var(--ease-snap); }
[data-design="b"] .rf-stamp--field-verified { color: var(--sys-mechanical); }
[data-design="b"] .rf-stamp--in-review      { color: var(--sys-ventilation); }
[data-design="b"] .rf-stamp--approved       { color: var(--sys-structural); }

[data-design="b"] .rf-funnel__issued { margin-top: 32px; padding: 40px clamp(20px,4vw,40px); border: 2px solid var(--sys-structural); text-align: left; display: grid; gap: 16px; }
[data-design="b"] .rf-funnel__issued[hidden] { display: none; }
[data-design="b"] .rf-issued-stamp { display: inline-block; padding: 16px 24px; border: 3px double var(--sys-structural); color: var(--sys-structural); font-family: var(--font-stamp); font-weight: 700; font-size: clamp(20px, 3vw, 28px); line-height: 1; letter-spacing: 0.08em; text-transform: uppercase; transform: rotate(-3.5deg); justify-self: start; animation: b-issued-stamp 480ms var(--ease-snap); }
[data-design="b"] .rf-funnel__thanks { font-size: 18px; line-height: 1.5; color: var(--ink); margin: 0; }
[data-design="b"] .rf-funnel__issued a { color: var(--guide); }
[data-design="b"] .rf-funnel__next-note { max-width: 760px; margin: 32px auto 0; font-size: 14px; line-height: 1.6; color: var(--muted); }

@keyframes b-stamp {
  0%   { opacity: 0; transform: rotate(-2deg) scale(1.12); }
  100% { opacity: 1; transform: rotate(-2deg) scale(1); }
}
@keyframes b-issued-stamp {
  0%   { opacity: 0; transform: rotate(-3.5deg) scale(1.18); }
  60%  { opacity: 1; transform: rotate(-3.5deg) scale(0.98); }
  100% { opacity: 1; transform: rotate(-3.5deg) scale(1); }
}

/* ===== PORTFOLIO / AMBIENT A ===== */
[data-design="b"] .rf-ambient-a { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; padding: var(--gap-section) clamp(16px, 4vw, 40px); align-items: start; background: var(--paper); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
[data-design="b"] .rf-ambient-a__copy .rf-h2 { margin: 0 0 24px; }
[data-design="b"] .rf-ambient-a__copy .rf-body { font-size: 16px; line-height: 1.6; color: var(--ink-2); max-width: 52ch; }
[data-design="b"] .rf-ambient-a__copy .rf-body p { margin: 0 0 16px; }
[data-design="b"] .rf-body__note { color: var(--muted); font-size: 15px; }
[data-design="b"] .rf-legend { list-style: none; padding: 24px 0 0; margin: 32px 0 0; border-top: 1px solid var(--rule); display: grid; grid-template-columns: repeat(2, max-content); gap: 12px 32px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }
[data-design="b"] .rf-legend li { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); }
[data-design="b"] .rf-legend__sw { width: 14px; height: 14px; border: 1px solid var(--ink); display: inline-block; }
[data-design="b"] .rf-legend__sw--s { background: var(--sys-structural); }
[data-design="b"] .rf-legend__sw--m { background: var(--sys-mechanical); }
[data-design="b"] .rf-legend__sw--e { background: var(--sys-electrical); }
[data-design="b"] .rf-legend__sw--v { background: var(--sys-ventilation); }

[data-design="b"] .rf-ambient-a__motion { width: 100%; max-width: 480px; justify-self: end; background: var(--paper-2); border: 1px solid var(--rule); padding: 16px; }
[data-design="b"] .rf-ambient-a__motion svg { width: 100%; height: auto; display: block; }
[data-design="b"] .rf-section__outline { fill: none; stroke: var(--ink); stroke-width: 1.5; }
[data-design="b"] .rf-section__floor   { stroke: var(--rule); stroke-width: 1; stroke-dasharray: 2 4; }
[data-design="b"] .rf-run { fill: none; stroke-width: 2.5; stroke-linecap: square; stroke-dasharray: 480; stroke-dashoffset: 480; }
[data-design="b"] .rf-ambient-a__motion .rf-run--s { stroke: var(--sys-structural); }
[data-design="b"] .rf-ambient-a__motion .rf-run--m { stroke: var(--sys-mechanical); }
[data-design="b"] .rf-ambient-a__motion .rf-run--e { stroke: var(--sys-electrical); }
[data-design="b"] .rf-ambient-a__motion .rf-run--v { stroke: var(--sys-ventilation); }
[data-design="b"] .rf-ambient-a__motion.is-active .rf-run { animation: b-amba-draw var(--dur-draw) var(--ease-draft) forwards; }
[data-design="b"] .rf-ambient-a__motion.is-active .rf-run--m { animation-delay: 200ms; }
[data-design="b"] .rf-ambient-a__motion.is-active .rf-run--e { animation-delay: 400ms; }
[data-design="b"] .rf-ambient-a__motion.is-active .rf-run--v { animation-delay: 600ms; }
[data-design="b"] .rf-flow { fill: var(--ink); opacity: 0; }
[data-design="b"] .rf-ambient-a__motion.is-active .rf-flow--s { fill: var(--sys-structural); opacity: 1; }
[data-design="b"] .rf-ambient-a__motion.is-active .rf-flow--m { fill: var(--sys-mechanical); opacity: 1; }
[data-design="b"] .rf-ambient-a__motion.is-active .rf-flow--e { fill: var(--sys-electrical); opacity: 1; }
[data-design="b"] .rf-ambient-a__motion.is-active .rf-flow--v { fill: var(--sys-ventilation); opacity: 1; }
[data-design="b"] .rf-section__dim       { stroke: var(--ink); stroke-width: 1; }
[data-design="b"] .rf-section__dim-label { fill: var(--muted); font-family: var(--font-mono); font-size: 8px; letter-spacing: 0.12em; }

@keyframes b-amba-draw { to { stroke-dashoffset: 0; } }

/* ===== REPEAT CTA ===== */
[data-design="b"] .rf-repeat-cta { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; padding: var(--gap-section-m) clamp(16px, 4vw, 40px); background: var(--paper-2); border-bottom: 1px solid var(--rule); }
[data-design="b"] .rf-repeat-cta__line { font-family: var(--font-display); font-size: clamp(22px, 3.2vw, 30px); letter-spacing: -0.015em; color: var(--ink); margin: 0; }

/* ===== AMBIENT B / PROCESS ===== */
[data-design="b"] .rf-ambient-b { padding: var(--gap-section) clamp(16px, 4vw, 40px); background: var(--paper); border-top: 1px solid var(--rule); }
[data-design="b"] .rf-ambient-b__head { max-width: 60ch; margin: 0 0 56px; }
[data-design="b"] .rf-ambient-b__head .rf-body { font-size: 16px; line-height: 1.6; color: var(--ink-2); }
[data-design="b"] .rf-ambient-b__head .rf-body p { margin: 0; }
[data-design="b"] .rf-ambient-b__motion { margin: 0; padding: 24px; background: var(--paper-2); border: 1px solid var(--rule); }
[data-design="b"] .rf-ambient-b__motion svg { width: 100%; height: auto; display: block; color: var(--ink); }
[data-design="b"] .rf-layer polygon { fill: var(--paper); stroke: var(--ink); stroke-width: 1.5; transform-origin: 50% 50%; transition: transform var(--dur-base) var(--ease-snap); }
[data-design="b"] .rf-layer .rf-lead { stroke: var(--sys-structural); stroke-width: 1; stroke-dasharray: 60; stroke-dashoffset: 60; transition: stroke-dashoffset var(--dur-base) var(--ease-draft); }
[data-design="b"] .rf-layer .rf-lead-label { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.1em; fill: var(--ink); opacity: 0; transition: opacity var(--dur-base) var(--ease-snap); }
[data-design="b"] .rf-ambient-b__motion.is-active .rf-layer { animation: b-ambb-lift 20s var(--ease-snap) infinite; }
[data-design="b"] .rf-ambient-b__motion.is-active .rf-layer--1 { animation-delay: 0s; }
[data-design="b"] .rf-ambient-b__motion.is-active .rf-layer--2 { animation-delay: 1s; }
[data-design="b"] .rf-ambient-b__motion.is-active .rf-layer--3 { animation-delay: 2s; }
[data-design="b"] .rf-ambient-b__motion.is-active .rf-layer--4 { animation-delay: 3s; }
[data-design="b"] .rf-ambient-b__motion.is-active .rf-layer--5 { animation-delay: 4s; }
[data-design="b"] .rf-ambient-b__motion.is-active .rf-layer .rf-lead { stroke-dashoffset: 0; }
[data-design="b"] .rf-ambient-b__motion.is-active .rf-layer .rf-lead-label { opacity: 1; }

@keyframes b-ambb-lift {
  0%, 90%, 100% { transform: translateY(0); }
  30%, 60%      { transform: translateY(-12px); }
}

/* ===== TRADE INDEX (Services) ===== */
[data-design="b"] .rf-index-sec { padding: var(--gap-section) clamp(16px, 4vw, 40px); background: var(--paper-2); border-top: 1px solid var(--rule); }
[data-design="b"] .rf-index-sec .rf-h2 { margin-bottom: 32px; }
[data-design="b"] .rf-trade-index { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--guide); }
[data-design="b"] .rf-trade-row { display: flex; align-items: baseline; gap: 20px; padding: 18px 4px; border-bottom: 1px solid var(--rule); transition: background var(--dur-fast) var(--ease-snap); }
[data-design="b"] .rf-trade-row:hover { background: rgba(79,179,217,0.06); }
[data-design="b"] .rf-trade-row__no { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; color: var(--guide); flex: none; }
[data-design="b"] .rf-trade-row__name { font-family: var(--font-display); font-size: clamp(18px, 2.6vw, 24px); letter-spacing: -0.01em; color: var(--ink); }

/* ===== ABOUT ===== */
[data-design="b"] .rf-about { padding: var(--gap-section) clamp(16px, 4vw, 40px); background: var(--paper); border-top: 1px solid var(--rule); }
[data-design="b"] .rf-about .rf-h2 { margin-bottom: 32px; }
[data-design="b"] .rf-about__cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px; border-top: 1px solid var(--guide); padding-top: 32px; }
[data-design="b"] .rf-about__label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--guide); margin: 0 0 12px; }
[data-design="b"] .rf-about__val { font-size: 16px; line-height: 1.6; color: var(--ink-2); margin: 0; }
[data-design="b"] .rf-about__val a { color: var(--sys-structural); text-decoration: none; }
[data-design="b"] .rf-about__val a:hover { text-decoration: underline; }

/* ===== FOOTER ===== */
[data-design="b"] .rf-footer { padding: var(--gap-section-m) clamp(16px, 4vw, 40px); background: var(--paper); }
[data-design="b"] .rf-footer__rule { height: 1px; }
[data-design="b"] .rf-footer__rule--ink { background: var(--guide); }
[data-design="b"] .rf-footer__rule--hair { background: var(--rule); }
[data-design="b"] .rf-footer__cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 32px; padding: 32px 0; font-family: var(--font-mono); font-size: 13px; line-height: 1.6; color: var(--ink-2); }
[data-design="b"] .rf-footer__label { font-size: 11px; letter-spacing: 0.12em; color: var(--muted); margin: 0 0 8px; }
[data-design="b"] .rf-footer__col p { margin: 0 0 6px; }
[data-design="b"] .rf-footer__col a { color: var(--guide); text-decoration: none; }
[data-design="b"] .rf-footer__col a:hover { text-decoration: underline; }
[data-design="b"] .rf-footer__funnel { color: var(--sys-structural) !important; }
[data-design="b"] .rf-footer__copy { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--muted); padding: 16px 0; margin: 0; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  [data-design="b"] .rf-ambient-a { grid-template-columns: 1fr; gap: 40px; padding: var(--gap-section-m) clamp(16px, 4vw, 32px); }
  [data-design="b"] .rf-ambient-a__motion { justify-self: stretch; max-width: 100%; }
}
@media (max-width: 760px) {
  [data-design="b"] .rf-ambient-b { padding: var(--gap-section-m) 16px; }
  [data-design="b"] .rf-ambient-b__head { margin-bottom: 32px; }
  [data-design="b"] .rf-layer .rf-lead-label { font-size: 8px; }
  [data-design="b"] .rf-funnel__index { grid-template-columns: 1fr 1fr 1fr; }
  [data-design="b"] .rf-funnel__grid { grid-template-columns: 1fr; }
  [data-design="b"] .rf-funnel__actions [data-stamp] { margin-left: 0; order: -1; }
  [data-design="b"] .rf-interactive,
  [data-design="b"] .rf-index-sec,
  [data-design="b"] .rf-about { padding-top: var(--gap-section-m); padding-bottom: var(--gap-section-m); }
}
@media (max-width: 560px) {
  [data-design="b"] .rf-header__atmos { opacity: 0.16; }
  [data-design="b"] .rf-ambient-a,
  [data-design="b"] .rf-ambient-b,
  [data-design="b"] .rf-interactive,
  [data-design="b"] .rf-index-sec,
  [data-design="b"] .rf-about { padding-left: 16px; padding-right: 16px; }
  [data-design="b"] .rf-funnel__sheet { padding: 20px 16px; }
  [data-design="b"] .rf-funnel__index { grid-template-columns: 1fr 1fr; font-size: 10px; }
}
@media (max-width: 380px) {
  [data-design="b"] .rf-btn { padding: 10px 14px; font-size: 11px; letter-spacing: 0.1em; }
}

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-header__atmos line,
  [data-design="b"] .rf-header__atmos circle,
  [data-design="b"] .rf-header__dimlabel { animation: none; stroke-dashoffset: 0; opacity: 1; }
  [data-design="b"] .rf-drawer__sheet { transition: none; }
  [data-design="b"] .rf-hero__ln,
  [data-design="b"] .rf-hero__dim { animation: none; stroke-dashoffset: 0; }
  [data-design="b"] .rf-hero__dimlabel { animation: none; opacity: 1; }
  [data-design="b"] .rf-hero__flow,
  [data-design="b"] .rf-flow { animation-play-state: paused !important; }
  [data-design="b"] .rf-hero__flow animateMotion,
  [data-design="b"] .rf-flow animateMotion { display: none; }
  [data-design="b"] .rf-cta__rule { animation: none; transform: scaleX(1); }
  [data-design="b"] .rf-cta__shaft, [data-design="b"] .rf-cta__head { transition: none; }
  [data-design="b"] .rf-pointer__dim { animation: none; stroke-dashoffset: 0; }
  [data-design="b"] .rf-pointer__head { animation: none; opacity: 1; }
  [data-design="b"] .rf-ambient-a__motion .rf-run { animation: none !important; stroke-dashoffset: 0 !important; }
  [data-design="b"] .rf-ambient-b__motion.is-active .rf-layer { animation: none; }
  [data-design="b"] .rf-layer polygon { transition: none; }
  [data-design="b"] .rf-layer .rf-lead { stroke-dashoffset: 0; }
  [data-design="b"] .rf-layer .rf-lead-label { opacity: 1; }
  [data-design="b"] .rf-funnel__sheet,
  [data-design="b"] .rf-funnel__sheet.is-leaving,
  [data-design="b"] .rf-funnel__sheet.is-entering { transition: none; transform: none; opacity: 1; }
  [data-design="b"] .rf-stamp, [data-design="b"] .rf-issued-stamp { animation: none; }
}

/* ===== MOBILE NO-H-SCROLL CONTRACT (must remain 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; }