/* ============================================================
   Rain City Design — DESIGN-B SLICE
   Register: cool blueprint / board-formed concrete (construction).
   Distinct from Site A: slate + drafting-blue, not warm lime-paper.
   All selectors scoped [data-design="b"]. All keyframes prefixed b-.
   ============================================================ */

[data-design="b"] {
  /* --- trade-rooted tokens (~15) --- */
  --b-paper:      #EAEDF0;   /* cool drafting-paper neutral */
  --b-paper-sub:  #DCE1E7;   /* nested panels */
  --b-concrete:   #B7BEC6;   /* board-formed concrete field */
  --b-slate:      #232A33;   /* deep slate band */
  --b-ink:        #1B222B;   /* body / display / hairlines */
  --b-ink-2:      #4E5A66;   /* secondary text, captions */
  --b-ink-3:      #7E8A96;   /* tertiary — dims, meta */
  --b-rule:       #C2CAD2;   /* hairlines, panel edges */
  --b-shadow:     #9AA4AE;   /* the single permitted shadow */
  --design-b-primary: #1F5C8B; /* drafting-blueprint blue — the chromatic accent */
  --b-primary-ink: #143F61;  /* :active deepen */
  --b-clay:       #B4623A;   /* iron-oxide clay — single warm specimen */
  --b-success:    #3F5A45;

  --b-font-display: "Archivo", "Söhne Breit", "Helvetica Neue", Arial, sans-serif;
  --b-font-body:    "Inter", -apple-system, "Segoe UI", system-ui, sans-serif;
  --b-font-meta:    "JetBrains Mono", "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --b-hair: 1px; --b-tape: 4px; --b-batten: 8px; --b-stretcher: 16px;
  --b-span: 24px; --b-bay: 40px; --b-court: 64px; --b-elevation: 96px;

  --b-ease-settle: cubic-bezier(0.22, 0.61, 0.36, 1);
  --b-ease-light:  cubic-bezier(0.4, 0, 0.2, 1);
  --b-tick: 120ms; --b-stroke: 240ms; --b-cure: 600ms;
}

[data-design="b"].dq-design,
[data-design="b"] .dq-design { color: var(--b-ink); background: var(--b-paper); }

[data-design="b"] *, [data-design="b"] *::before, [data-design="b"] *::after { box-sizing: border-box; }
[data-design="b"] h1, [data-design="b"] h2, [data-design="b"] p, [data-design="b"] ol { margin: 0; }
[data-design="b"] ol { list-style: none; padding: 0; }

/* ===== ELEMENT 1 — header ===== */
[data-design="b"] .b-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in oklab, var(--b-paper), transparent 6%);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--b-rule);
  isolation: isolate; overflow: hidden;
}
[data-design="b"] .b-header__light { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
[data-design="b"] .b-header__rule {
  position: absolute; left: 0; bottom: 0; height: 2px; width: 100%;
  transform-origin: left center; transform: scaleX(0);
  background: linear-gradient(90deg, var(--design-b-primary), transparent 70%);
  animation: b-rule-sweep 18s var(--b-ease-light) infinite;
}
[data-design="b"] .b-header__bar {
  position: relative; z-index: 1;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--b-stretcher);
  padding: var(--b-batten) clamp(var(--b-stretcher), 4vw, var(--b-bay));
  min-height: 64px;
}
[data-design="b"] .b-header__logo {
  font-family: var(--b-font-display); font-weight: 700;
  font-size: clamp(17px, 1.6vw, 21px); letter-spacing: -0.01em;
  color: var(--b-ink); text-decoration: none; text-transform: uppercase;
}
[data-design="b"] .b-header__mark { display: block; line-height: 1; }
[data-design="b"] .b-header__hamburger {
  appearance: none; background: transparent; border: 1px solid var(--b-rule);
  border-radius: var(--b-tape); width: 44px; height: 44px;
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 5px; cursor: pointer; color: var(--b-ink);
  transition: border-color var(--b-stroke) var(--b-ease-settle);
}
[data-design="b"] .b-header__hamburger:hover,
[data-design="b"] .b-header__hamburger:focus-visible { border-color: var(--b-ink); outline: none; }
[data-design="b"] .b-header__line {
  display: block; width: 18px; height: 1px; background: currentColor;
  transition: transform var(--b-stroke) var(--b-ease-settle);
}
[data-design="b"] .b-header__hamburger[aria-expanded="true"] .b-header__line:nth-child(1) { transform: translateY(3px) rotate(45deg); }
[data-design="b"] .b-header__hamburger[aria-expanded="true"] .b-header__line:nth-child(2) { transform: translateY(-3px) rotate(-45deg); }

[data-design="b"] .b-liner {
  position: fixed; inset: 64px 0 0 0; z-index: 35;
  background: var(--b-slate); color: var(--b-paper);
  padding: var(--b-bay) clamp(var(--b-stretcher), 6vw, var(--b-elevation));
  display: flex; flex-direction: column; justify-content: space-between; gap: var(--b-bay);
  transform: translateY(-8px); opacity: 0;
  transition: transform var(--b-cure) var(--b-ease-settle), opacity var(--b-cure) var(--b-ease-settle);
}
[data-design="b"] .b-liner[data-open="true"] { transform: translateY(0); opacity: 1; }
[data-design="b"] .b-liner__nav { display: flex; flex-direction: column; }
[data-design="b"] .b-liner__nav a {
  font-family: var(--b-font-display); font-weight: 400;
  font-size: clamp(28px, 5vw, 46px); letter-spacing: -0.02em;
  color: var(--b-paper); text-decoration: none;
  padding: var(--b-stretcher) 0; border-bottom: 1px solid color-mix(in oklab, var(--b-paper), transparent 80%);
}
[data-design="b"] .b-liner__contact { display: flex; flex-wrap: wrap; gap: var(--b-stretcher); }
[data-design="b"] .b-liner__phone, [data-design="b"] .b-liner__funnel {
  font-family: var(--b-font-meta); font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase;
  text-decoration: none; padding: 14px 18px; border-radius: var(--b-tape); min-height: 44px;
  display: inline-flex; align-items: center;
}
[data-design="b"] .b-liner__phone { color: var(--b-paper); border: 1px solid color-mix(in oklab, var(--b-paper), transparent 65%); }
[data-design="b"] .b-liner__funnel { background: var(--design-b-primary); color: var(--b-paper); }

/* ===== ELEMENT 3 — hero backdrop (blueprint draft) + text ===== */
[data-design="b"] .b-hero {
  position: relative; isolation: isolate; overflow: hidden;
  background: linear-gradient(160deg, var(--b-paper), var(--b-concrete) 220%);
  border-bottom: 1px solid var(--b-rule);
  padding: clamp(72px, 12vw, 160px) clamp(var(--b-stretcher), 6vw, var(--b-elevation));
  min-height: clamp(520px, 78vh, 760px);
  display: flex; align-items: center;
}
[data-design="b"] .b-hero__plate {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  color: var(--design-b-primary);
  opacity: 0.42;
  display: flex; align-items: center; justify-content: flex-end;
}
[data-design="b"] .b-hero__draft { width: min(62%, 720px); height: 100%; }
@media (max-width: 880px) { [data-design="b"] .b-hero__draft { width: 100%; } [data-design="b"] .b-hero__plate { justify-content: center; opacity: 0.3; } }

/* blueprint draw-in: lines stroke in by 2s, then a perpetual ambient breath */
[data-design="b"] .b-line {
  stroke-dasharray: 1400; stroke-dashoffset: 1400;
  animation:
    b-draw 1.9s var(--b-ease-settle) forwards,
    b-breath 9s var(--b-ease-light) 2s infinite;
}
[data-design="b"] .b-line--2 { animation-delay: 0.15s, 2.1s; }
[data-design="b"] .b-line--3 { animation-delay: 0.3s, 2.3s; }
[data-design="b"] .b-line--4 { animation-delay: 0.45s, 2.5s; }
[data-design="b"] .b-line--5 { animation-delay: 0.6s, 2.7s; }
[data-design="b"] .b-hero__dims { opacity: 0; animation: b-dim-in 1s var(--b-ease-light) 1.4s forwards; }

[data-design="b"] .b-hero__inner {
  position: relative; z-index: 1; max-width: 30ch;
  display: flex; flex-direction: column; gap: var(--b-stretcher);
}
[data-design="b"] .b-hero__eyebrow {
  font-family: var(--b-font-meta); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--b-ink-2);
}
[data-design="b"] .b-hero__title {
  font-family: var(--b-font-display); font-weight: 700;
  font-size: clamp(34px, 6vw, 64px); line-height: 1.02; letter-spacing: -0.025em;
  color: var(--b-ink); max-width: 16ch;
}
[data-design="b"] .b-hero__sub {
  font-family: var(--b-font-body); font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.55; color: var(--b-ink-2); max-width: 46ch;
}
[data-design="b"] .b-hero__proof {
  font-family: var(--b-font-meta); font-size: 12px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--b-ink-3);
}
[data-design="b"] .b-hero__cta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--b-stretcher); margin-top: var(--b-batten); }

/* ===== ELEMENT 2 — the stroke (funnel-anchor CTA) ===== */
[data-design="b"] .b-stroke {
  position: relative; isolation: isolate; overflow: hidden;
  display: inline-flex; align-items: center; gap: var(--b-stretcher);
  padding: 15px 24px; min-height: 44px; border-radius: var(--b-tape);
  font-family: var(--b-font-body); font-weight: 600; font-size: 15px; line-height: 1;
  letter-spacing: 0.01em; text-decoration: none; cursor: pointer; border: 1px solid transparent;
  transition: transform var(--b-stroke) var(--b-ease-settle),
              background-color var(--b-stroke) var(--b-ease-settle),
              box-shadow var(--b-stroke) var(--b-ease-settle);
}
[data-design="b"] .b-stroke--field {
  background: var(--design-b-primary); color: var(--b-paper);
  box-shadow: 0 1px 0 var(--b-primary-ink);
}
[data-design="b"] .b-stroke--ghost {
  background: transparent; color: inherit; border-color: currentColor;
  font-family: var(--b-font-meta); font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase;
}
[data-design="b"] .b-stroke__sheen {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: linear-gradient(105deg, transparent 30%, color-mix(in oklab, var(--b-paper), transparent 75%) 50%, transparent 70%);
  transform: translateX(-130%);
  animation: b-sheen 5000ms var(--b-ease-light) infinite;
}
[data-design="b"] .b-stroke__label, [data-design="b"] .b-stroke__arrow { position: relative; z-index: 1; }
[data-design="b"] .b-stroke__arrow { display: inline-flex; transition: transform var(--b-stroke) var(--b-ease-settle); }
[data-design="b"] .b-stroke--field:hover, [data-design="b"] .b-stroke--field:focus-visible {
  outline: none; transform: translateY(-1px);
  box-shadow: 0 2px 0 var(--b-primary-ink), 0 0 0 2px color-mix(in oklab, var(--design-b-primary), transparent 70%);
}
[data-design="b"] .b-stroke--field:hover .b-stroke__sheen { animation-duration: 1800ms; }
[data-design="b"] .b-stroke--field:hover .b-stroke__arrow { transform: translateX(3px); }
[data-design="b"] .b-stroke--field:active {
  background: var(--b-primary-ink); transform: translateY(0.5px);
  box-shadow: inset 0 1px 0 color-mix(in oklab, var(--b-ink), transparent 60%);
}
[data-design="b"] .b-stroke--ghost:hover, [data-design="b"] .b-stroke--ghost:focus-visible { outline: none; color: var(--design-b-primary); }
[data-design="b"] .b-stamp {
  font-family: var(--b-font-meta); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--b-ink-2); border: 1px solid var(--b-rule); border-radius: var(--b-tape);
  padding: 8px 12px; background: color-mix(in oklab, var(--b-paper), transparent 30%);
}

/* ===== ELEMENT 6 — pointer (level-bubble drift) ===== */
[data-design="b"] .b-pointer {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  padding: clamp(40px, 7vw, 72px) 16px clamp(48px, 8vw, 80px);
  background: var(--b-paper);
}
[data-design="b"] .b-pointer__label {
  font-family: var(--b-font-meta); font-size: 11px; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--b-ink-2);
}
[data-design="b"] .b-pointer__rule { display: block; width: 1px; height: 40px; background: var(--b-ink-3); }
[data-design="b"] .b-pointer__bubble {
  position: relative; width: 84px; height: 16px;
  border: 1px solid var(--b-ink-3); border-radius: 8px;
  background: color-mix(in oklab, var(--design-b-primary), transparent 88%); overflow: hidden;
}
[data-design="b"] .b-pointer__level {
  position: absolute; top: 1px; bottom: 1px; width: 22px; border-radius: 7px;
  left: calc(50% - 11px); background: var(--design-b-primary); opacity: 0.85;
  animation: b-level-drift 5.5s var(--b-ease-light) infinite;
}

/* ===== ELEMENT 5 — funnel ===== */
[data-design="b"] .b-funnel {
  padding: var(--b-court) clamp(var(--b-stretcher), 6vw, var(--b-elevation));
  background: var(--b-paper-sub); border-block: 1px solid var(--b-rule);
}
@media (min-width: 760px) { [data-design="b"] .b-funnel { padding-block: var(--b-elevation); } }
[data-design="b"] .b-funnel__header { max-width: 56ch; margin-bottom: var(--b-bay); display: flex; flex-direction: column; gap: var(--b-batten); }
[data-design="b"] .b-funnel__eyebrow, [data-design="b"] .b-board__eyebrow,
[data-design="b"] .b-process__eyebrow, [data-design="b"] .b-about__eyebrow {
  font-family: var(--b-font-meta); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--b-ink-2);
}
[data-design="b"] .b-funnel__title, [data-design="b"] .b-board__title, [data-design="b"] .b-about__title {
  font-family: var(--b-font-display); font-weight: 700;
  font-size: clamp(28px, 4.2vw, 48px); line-height: 1.04; letter-spacing: -0.025em; color: var(--b-ink);
}
[data-design="b"] .b-funnel__lede { color: var(--b-ink-2); max-width: 56ch; font-size: clamp(16px, 1.1vw, 18px); line-height: 1.55; }

[data-design="b"] .b-step { border-top: 1px solid var(--b-rule); padding-top: var(--b-span); margin-top: var(--b-span); }
[data-design="b"] .b-step:first-child { border-top: 0; margin-top: 0; padding-top: 0; }
[data-design="b"] .b-step[data-active="false"] { display: none; }
[data-design="b"] .b-step__legend {
  font-family: var(--b-font-meta); font-size: 12px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--b-ink); margin-bottom: var(--b-stretcher);
  display: flex; align-items: baseline; gap: var(--b-batten);
}
[data-design="b"] .b-step__no { color: var(--design-b-primary); font-weight: 700; }
[data-design="b"] .b-step__row { display: flex; flex-wrap: wrap; gap: var(--b-batten); }
[data-design="b"] .b-opt {
  appearance: none; cursor: pointer; min-height: 44px;
  font-family: var(--b-font-body); font-size: 15px; color: var(--b-ink);
  padding: 11px 18px; border: 1px solid var(--b-rule); border-radius: var(--b-tape);
  background: var(--b-paper);
  transition: border-color var(--b-tick) var(--b-ease-settle), background-color var(--b-tick) var(--b-ease-settle), color var(--b-tick) var(--b-ease-settle);
}
[data-design="b"] .b-opt:hover, [data-design="b"] .b-opt:focus-visible { border-color: var(--b-ink); outline: none; }
[data-design="b"] .b-opt[data-selected="true"] { background: var(--design-b-primary); color: var(--b-paper); border-color: var(--design-b-primary); }

[data-design="b"] .b-spec { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--b-span); }
[data-design="b"] .b-spec__field { display: flex; flex-direction: column; gap: var(--b-batten); }
[data-design="b"] .b-spec__field--wide { grid-column: 1 / -1; }
[data-design="b"] .b-spec__label {
  font-family: var(--b-font-meta); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--b-ink-2);
}
[data-design="b"] .b-spec input, [data-design="b"] .b-spec textarea {
  font-family: var(--b-font-body); font-size: 16px; color: var(--b-ink);
  background: var(--b-paper); border: 0; border-bottom: 1px solid var(--b-rule);
  padding: 10px 2px; border-radius: 0; min-height: 44px; width: 100%;
  transition: border-color var(--b-stroke) var(--b-ease-settle);
}
[data-design="b"] .b-spec textarea { min-height: 88px; resize: vertical; }
[data-design="b"] .b-spec input:focus, [data-design="b"] .b-spec textarea:focus { outline: none; border-bottom: 2px solid var(--b-slate); }
[data-design="b"] .b-form__submit { margin-top: var(--b-span); }
[data-design="b"] .b-form__progress { display: flex; align-items: center; gap: var(--b-stretcher); margin-top: var(--b-bay); }
[data-design="b"] .b-form__count { font-family: var(--b-font-meta); font-size: 11px; letter-spacing: 0.14em; color: var(--b-ink-2); }
[data-design="b"] .b-form__track { position: relative; flex: 1; height: 2px; background: var(--b-rule); }
[data-design="b"] .b-form__fill { position: absolute; inset: 0 auto 0 0; width: 20%; background: var(--design-b-primary); transition: width var(--b-stroke) var(--b-ease-settle); }
[data-design="b"] .b-funnel__after { margin-top: var(--b-bay); color: var(--b-ink-2); font-size: 14px; line-height: 1.6; }
[data-design="b"] .b-funnel__after a { color: var(--design-b-primary); }

/* ===== ELEMENT 4 — process band (Ando concrete, ambient cloud) ===== */
[data-design="b"] .b-process {
  position: relative; isolation: isolate; overflow: hidden;
  padding: clamp(72px, 14vw, 160px) clamp(var(--b-stretcher), 8vw, var(--b-elevation));
  background: var(--b-slate); color: var(--b-paper);
}
[data-design="b"] .b-process__field {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: repeating-linear-gradient(90deg, transparent 0, transparent 120px,
    color-mix(in oklab, var(--b-paper), transparent 92%) 120px,
    color-mix(in oklab, var(--b-paper), transparent 92%) 122px);
}
[data-design="b"] .b-process__cloud {
  position: absolute; width: 140%; height: 200%; top: -50%; border-radius: 50%;
  filter: blur(60px); pointer-events: none; will-change: transform, opacity;
}
[data-design="b"] .b-process__cloud--1 { left: -50%;
  background: radial-gradient(closest-side, color-mix(in oklab, var(--design-b-primary), transparent 60%), transparent 65%);
  animation: b-cloud 31s var(--b-ease-light) infinite; }
[data-design="b"] .b-process__cloud--2 { right: -55%;
  background: radial-gradient(closest-side, color-mix(in oklab, var(--b-clay), transparent 75%), transparent 65%);
  animation: b-cloud-rev 43s var(--b-ease-light) infinite; }
[data-design="b"] .b-process__inner { position: relative; z-index: 1; max-width: 70ch; }
[data-design="b"] .b-process__eyebrow { color: color-mix(in oklab, var(--b-paper), transparent 35%); }
[data-design="b"] .b-process__title {
  font-family: var(--b-font-display); font-weight: 700; font-size: clamp(30px, 4.5vw, 56px);
  line-height: 1.05; letter-spacing: -0.025em; margin: var(--b-batten) 0 var(--b-bay);
}
[data-design="b"] .b-process__steps { display: grid; gap: 1px; background: color-mix(in oklab, var(--b-paper), transparent 85%); border: 1px solid color-mix(in oklab, var(--b-paper), transparent 85%); }
[data-design="b"] .b-phase {
  display: grid; grid-template-columns: auto minmax(0,1fr); gap: var(--b-stretcher) var(--b-span);
  align-items: baseline; padding: var(--b-span); background: var(--b-slate);
}
[data-design="b"] .b-phase__no { font-family: var(--b-font-meta); font-size: 13px; color: var(--design-b-primary); }
[data-design="b"] .b-phase__name { font-family: var(--b-font-display); font-weight: 600; font-size: clamp(18px, 2vw, 24px); }
[data-design="b"] .b-phase__note { grid-column: 2; color: color-mix(in oklab, var(--b-paper), transparent 35%); font-size: 15px; line-height: 1.5; }

/* ===== Services board (Ambient A — light sweep across planes) ===== */
[data-design="b"] .b-board {
  position: relative; isolation: isolate; overflow: hidden;
  padding: var(--b-court) clamp(var(--b-stretcher), 6vw, var(--b-elevation));
  background: var(--b-paper); border-bottom: 1px solid var(--b-rule);
}
@media (min-width: 760px) { [data-design="b"] .b-board { padding-block: var(--b-elevation); } }
[data-design="b"] .b-board__header { max-width: 56ch; margin-bottom: var(--b-bay); display: flex; flex-direction: column; gap: var(--b-batten); }
[data-design="b"] .b-board__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--b-span); }
[data-design="b"] .b-card {
  position: relative; overflow: hidden; display: flex; flex-direction: column;
  background: var(--b-paper-sub); border: 1px solid var(--b-rule); border-radius: var(--b-tape);
}
[data-design="b"] .b-card__plane { display: block; height: 120px; background: var(--b-concrete); position: relative; }
[data-design="b"] .b-card:nth-child(odd) .b-card__plane { background: color-mix(in oklab, var(--b-concrete), var(--b-ink) 6%); }
[data-design="b"] .b-card__plane::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(105deg, transparent 38%, rgba(255,255,255,0.4) 50%, transparent 62%);
  transform: translateX(-120%); animation: b-board-sweep 24s var(--b-ease-light) infinite;
}
[data-design="b"] .b-card:nth-child(2) .b-card__plane::after { animation-delay: -3s; }
[data-design="b"] .b-card:nth-child(3) .b-card__plane::after { animation-delay: -6s; }
[data-design="b"] .b-card:nth-child(4) .b-card__plane::after { animation-delay: -9s; }
[data-design="b"] .b-card:nth-child(5) .b-card__plane::after { animation-delay: -12s; }
[data-design="b"] .b-card:nth-child(6) .b-card__plane::after { animation-delay: -15s; }
[data-design="b"] .b-card:nth-child(7) .b-card__plane::after { animation-delay: -18s; }
[data-design="b"] .b-card:nth-child(8) .b-card__plane::after { animation-delay: -21s; }
[data-design="b"] .b-card__label { font-family: var(--b-font-display); font-weight: 600; font-size: 17px; color: var(--b-ink); padding: var(--b-stretcher) var(--b-stretcher) var(--b-tape); }
[data-design="b"] .b-card__meta { font-family: var(--b-font-meta); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--b-ink-3); padding: 0 var(--b-stretcher) var(--b-stretcher); }
[data-design="b"] .b-board__repeat { margin-top: var(--b-bay); }

/* ===== About ===== */
[data-design="b"] .b-about {
  padding: var(--b-court) clamp(var(--b-stretcher), 6vw, var(--b-elevation));
  background: var(--b-paper-sub); border-bottom: 1px solid var(--b-rule);
}
@media (min-width: 760px) { [data-design="b"] .b-about { padding-block: var(--b-elevation); } }
[data-design="b"] .b-about__inner { max-width: 60ch; display: flex; flex-direction: column; gap: var(--b-stretcher); }
[data-design="b"] .b-about__body { color: var(--b-ink-2); font-size: clamp(16px, 1.2vw, 19px); line-height: 1.65; }

/* ===== Footer ===== */
[data-design="b"] .b-footer { position: relative; background: var(--b-slate); color: var(--b-paper); padding: var(--b-elevation) clamp(var(--b-stretcher), 6vw, var(--b-elevation)); }
[data-design="b"] .b-footer__inner { display: flex; flex-direction: column; gap: var(--b-stretcher); max-width: 70ch; }
[data-design="b"] .b-footer__mark { font-family: var(--b-font-display); font-weight: 700; font-size: clamp(24px, 3vw, 36px); letter-spacing: -0.02em; text-transform: uppercase; }
[data-design="b"] .b-footer__line { font-family: var(--b-font-meta); font-size: 12px; letter-spacing: 0.08em; color: color-mix(in oklab, var(--b-paper), transparent 35%); }
[data-design="b"] .b-footer__cta { display: flex; flex-wrap: wrap; gap: var(--b-stretcher); margin: var(--b-stretcher) 0; }
[data-design="b"] .b-footer__email a { color: var(--b-paper); font-size: 14px; }
[data-design="b"] .b-footer__copy { font-family: var(--b-font-meta); font-size: 11px; letter-spacing: 0.1em; color: color-mix(in oklab, var(--b-paper), transparent 50%); margin-top: var(--b-span); }

/* ===== Keyframes ===== */
@keyframes b-rule-sweep { 0% { transform: scaleX(0); } 30% { transform: scaleX(1); } 80% { transform: scaleX(1); } 100% { transform: scaleX(0); } }
@keyframes b-draw { to { stroke-dashoffset: 0; } }
@keyframes b-breath { 0%,100% { opacity: 0.5; } 50% { opacity: 1; } }
@keyframes b-dim-in { to { opacity: 0.7; } }
@keyframes b-sheen { 0% { transform: translateX(-130%); } 60% { transform: translateX(130%); } 100% { transform: translateX(130%); } }
@keyframes b-level-drift { 0%,100% { transform: translateX(-26px); } 50% { transform: translateX(26px); } }
@keyframes b-cloud { 0%,100% { transform: translate3d(0,0,0); opacity: 0.7; } 50% { transform: translate3d(26%,-8%,0); opacity: 1; } }
@keyframes b-cloud-rev { 0%,100% { transform: translate3d(0,0,0); opacity: 0.5; } 50% { transform: translate3d(-20%,6%,0); opacity: 0.8; } }
@keyframes b-board-sweep { 0% { transform: translateX(-120%); } 55% { transform: translateX(120%); } 100% { transform: translateX(120%); } }

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .b-header__rule { animation: none; transform: scaleX(0.5); }
  [data-design="b"] .b-line { animation: b-draw 0.01s linear forwards; stroke-dashoffset: 0; }
  [data-design="b"] .b-hero__dims { animation: none; opacity: 0.7; }
  [data-design="b"] .b-stroke__sheen, [data-design="b"] .b-card__plane::after { animation: none; transform: translateX(20%); opacity: 0.3; }
  [data-design="b"] .b-pointer__level { animation: none; }
  [data-design="b"] .b-process__cloud { animation: none; transform: translate3d(12%,-4%,0); opacity: 0.7; }
  [data-design="b"] .b-liner, [data-design="b"] .b-opt, [data-design="b"] .b-stroke { transition: none; }
}

@media (max-width: 760px) {
  [data-design="b"] .b-spec { grid-template-columns: 1fr; }
  [data-design="b"] .b-phase { grid-template-columns: 1fr; gap: var(--b-batten); }
  [data-design="b"] .b-phase__note { grid-column: 1; }
}
@media (max-width: 560px) {
  [data-design="b"] .b-liner { inset: 64px 0 0 0; }
  [data-design="b"] .b-hero { min-height: clamp(480px, 80vh, 640px); }
}

/* ===== Mandatory mobile-safety tail (append-at-bottom contract) ===== */
[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; }