/* ═══════════════════════════════════════════════════════════════════
   Sanders Heating & Cooling LLC — Design A (bazalgette-drainage)
   Scope: [data-design="a"].dq-design
   Thermal tokens: --thermal-temp (0..1 cold→warm), --thermal-bg, --thermal-accent
   ~12–16 color tokens + bazalgette design system
   ALL selectors scoped [data-design="a"] — ZERO [data-design="a"]
═══════════════════════════════════════════════════════════════════ */

/* ── Google Fonts (display + body) ───────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+SC:wght@400;600&family=Roboto+Slab:wght@400;700&family=Source+Serif+4:ital,wght@0,400;0,600;1,400&display=swap');

/* ── Design token block ───────────────────────────────────────────── */
[data-design="a"] {
  /* Bazalgette palette — 12 tokens */
  --bz-vellum:   #f3ead4;
  --bz-brick:    #c4a062;
  --bz-iron:     #1c2528;
  --bz-indigo:   #1d2848;
  --bz-glaze:    #245c5e;
  --bz-brass:    #8b6a2f;
  --bz-rule:     #c8b88a;
  --bz-muted:    #6b6557;
  --bz-critical: #a82e1e;
  --bz-success:  #4a6b3a;

  /* Thermal tokens (HVAC mandatory) */
  --thermal-temp:   0;        /* 0=cold, 1=warm — driven by dial + scroll */
  --thermal-bg:     #1c3a4a;  /* cool teal-blue start */
  --thermal-accent: #245c5e;  /* glaze at cold; warms toward amber */

  /* Design-a primary (exposed per contract) */
  --design-a-primary: var(--bz-indigo);

  /* Derived thermal colors (read --thermal-temp) */
  --thermal-cool-h: 196;
  --thermal-warm-h: 32;

  /* Spacing (6px Victorian brick course) */
  --bz-course:  6px;
  --bz-row:    12px;
  --bz-band:   24px;
  --bz-bay:    48px;
  --bz-vault:  96px;
  --bz-nave:  144px;

  /* Motion */
  --bz-ease-engine:   cubic-bezier(0.4, 0, 0.2, 1);
  --bz-ease-inscribe: cubic-bezier(0.65, 0, 0.35, 1);
  --bz-ease-settle:   cubic-bezier(0.16, 1, 0.3, 1);
  --bz-pulse:    4600ms;
  --bz-inscribe: 1400ms;
  --bz-settle:    280ms;
  --bz-fast:      140ms;

  /* Radius */
  --bz-radius-0:         0px;
  --bz-radius-1:         2px;
  --bz-radius-cartouche: 4px;

  /* Base */
  background: var(--bz-vellum);
  color: var(--bz-iron);
  font-family: 'Source Serif 4', 'Charter', Georgia, serif;
  font-size: 17px;
  line-height: 1.55;
  overflow-x: clip;
}

/* ── Reset helpers ─────────────────────────────────────────────────── */
[data-design="a"].dq-design *, [data-design="a"].dq-design *::before, [data-design="a"].dq-design *::after {
  box-sizing: border-box;
}
[data-design="a"].dq-design h1, [data-design="a"].dq-design h2, [data-design="a"].dq-design h3 { margin: 0; }
[data-design="a"].dq-design p { margin: 0; }
[data-design="a"].dq-design ul, [data-design="a"].dq-design ol { list-style: none; margin: 0; padding: 0; }
[data-design="a"].dq-design a { color: inherit; }

/* ═══════════════════════════════════════════════════════════════════
   E1 — ANIMATED MINIMALIST HEADER
═══════════════════════════════════════════════════════════════════ */
[data-design="a"] .bz-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--bz-vellum);
  border-bottom: 1px solid var(--bz-rule);
  overflow: hidden;
  isolation: isolate;
}
/* Atmospheric sweep — slow brass wash L→R over 26s */
[data-design="a"] .bz-header__sweep {
  position: absolute; inset: 0;
  background: linear-gradient(90deg,
    transparent 0%,
    color-mix(in oklab, var(--bz-brass), transparent 88%) 40%,
    color-mix(in oklab, var(--bz-brass), transparent 60%) 50%,
    color-mix(in oklab, var(--bz-brass), transparent 88%) 60%,
    transparent 100%);
  background-size: 220% 100%;
  animation: bz-header-sweep 26s linear infinite;
  pointer-events: none; z-index: 0;
}
/* Crosshatch — Victorian engineering pattern, breathes 19s */
[data-design="a"] .bz-header__crosshatch {
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(45deg,
      color-mix(in oklab, var(--bz-rule), transparent 75%) 0 1px,
      transparent 1px 11px),
    repeating-linear-gradient(-45deg,
      color-mix(in oklab, var(--bz-rule), transparent 80%) 0 1px,
      transparent 1px 14px);
  opacity: 0.4;
  animation: bz-header-breathe 19s ease-in-out infinite;
  pointer-events: none; z-index: 0;
}
[data-design="a"] .bz-header__bar {
  position: relative; z-index: 1;
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1200px; margin: 0 auto;
  padding: clamp(12px, 2vw, 22px) clamp(16px, 4vw, 40px);
  gap: 16px;
}
[data-design="a"] .bz-logo { text-decoration: none; color: var(--bz-iron); }
[data-design="a"] .bz-logo__mark {
  font-family: 'Cormorant SC', 'Trajan Pro', Georgia, serif;
  font-weight: 600;
  letter-spacing: 0.16em;
  font-size: clamp(15px, 2vw, 22px);
  text-transform: uppercase;
}
[data-design="a"] .bz-hamburger {
  background: transparent; border: 1px solid var(--bz-rule);
  width: 44px; height: 44px;
  display: inline-flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 5px;
  cursor: pointer;
  border-radius: var(--bz-radius-1);
  transition: border-color var(--bz-fast) var(--bz-ease-settle);
  flex-shrink: 0;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="a"] .bz-hamburger:hover { border-color: var(--bz-brass); }
}
[data-design="a"] .bz-hamburger:focus-visible {
  border-color: var(--bz-brass); outline: none;
}
[data-design="a"] .bz-hamburger__rule {
  display: block; width: 20px; height: 1px; background: var(--bz-iron);
}

/* Drawer */
[data-design="a"] .bz-drawer[hidden] { display: none; }
[data-design="a"] .bz-drawer {
  position: fixed; inset: 0; z-index: 60;
  background: color-mix(in oklab, var(--bz-iron), transparent 30%);
  display: flex; justify-content: flex-end;
}
[data-design="a"] .bz-drawer__plate {
  background: var(--bz-vellum);
  width: min(420px, 88vw); height: 100%;
  padding: 48px 32px;
  border-left: 1px solid var(--bz-rule);
  display: flex; flex-direction: column; gap: 24px;
  overflow-y: auto;
  transform: translateX(8px);
  animation: bz-drawer-tip-in 320ms var(--bz-ease-settle) forwards;
}
[data-design="a"] .bz-drawer__eyebrow {
  font-family: 'Cormorant SC', Georgia, serif;
  text-transform: uppercase; letter-spacing: 0.18em;
  font-size: 13px; color: var(--bz-muted);
}
[data-design="a"] .bz-drawer__nav { display: flex; flex-direction: column; gap: 14px; }
[data-design="a"] .bz-drawer__link {
  font-family: 'Cormorant SC', Georgia, serif;
  font-size: 26px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--bz-iron); text-decoration: none;
  display: flex; align-items: baseline; gap: 14px;
  padding-bottom: 8px; border-bottom: 1px solid var(--bz-rule);
}
[data-design="a"] .bz-drawer__link--phone {
  font-size: 20px; color: var(--bz-indigo);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="a"] .bz-drawer__link:hover {
    color: var(--bz-indigo); border-bottom-color: var(--bz-brass);
  }
}
[data-design="a"] .bz-drawer__num {
  font-family: ui-monospace, monospace; font-size: 13px;
  color: var(--bz-brass); min-width: 28px;
}
[data-design="a"] .bz-drawer__cta { margin-top: 8px; }
[data-design="a"] .bz-drawer__close {
  margin-top: auto; align-self: flex-start;
  background: transparent; border: 1px solid var(--bz-rule);
  padding: 10px 18px; cursor: pointer;
  font-family: 'Cormorant SC', Georgia, serif; letter-spacing: 0.14em;
  text-transform: uppercase; font-size: 13px; color: var(--bz-iron);
  min-height: 44px;
}

/* Header keyframes */
@keyframes bz-header-sweep {
  from { background-position: -110% 0; }
  to   { background-position: 110% 0; }
}
@keyframes bz-header-breathe {
  0%, 100% { opacity: 0.28; }
  50%      { opacity: 0.46; }
}
@keyframes bz-drawer-tip-in {
  from { transform: translateX(40px); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .bz-header__sweep,
  [data-design="a"] .bz-header__crosshatch { animation: none; opacity: 0.34; }
  [data-design="a"] .bz-drawer__plate { animation: none; transform: none; }
}

/* ═══════════════════════════════════════════════════════════════════
   HERO — thermal backdrop (E3) + comfort-dial (E5) + CTA (E2)
   Text at opacity:1, never reveal-gated
═══════════════════════════════════════════════════════════════════ */
[data-design="a"] .bz-hero {
  position: relative;
  min-height: clamp(480px, 72vh, 720px);
  display: flex; align-items: center;
  overflow: hidden; isolation: isolate;
  background: var(--bz-iron);   /* fallback */
}

/* E3: thermal animated backdrop — ONE animated layer, sustained ambient */
[data-design="a"] .bz-hero__thermal {
  position: absolute; inset: 0; z-index: 0;
  pointer-events: none;
}
[data-design="a"] .bz-hero__thermal-field {
  position: absolute; inset: 0;
  /* Cool teal base — warms via --thermal-temp toward amber */
  background: linear-gradient(
    135deg,
    hsl(196, 45%, 16%) 0%,
    hsl(196, 40%, 22%) 40%,
    hsl(32, 30%, 20%) 100%
  );
  /* Thermal warm layer driven by CSS var */
  background-blend-mode: normal;
  animation: bz-thermal-pulse 7s var(--bz-ease-engine) infinite;
}
/* Thermal overlay shifts with --thermal-temp (0→1 cold→warm) via JS */
[data-design="a"] .bz-hero__thermal-field::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(
    ellipse 80% 60% at 60% 50%,
    hsl(32, 50%, 28%) 0%,
    transparent 70%
  );
  opacity: calc(var(--thermal-temp) * 0.6);
  transition: opacity 600ms ease;
}

/* Isothermal arcs — sustained slow drift */
[data-design="a"] .bz-hero__isotherms {
  position: absolute; inset: 0; width: 100%; height: 100%;
}
[data-design="a"] .bz-iso { opacity: 0; }
[data-design="a"] .bz-iso--1 {
  animation: bz-iso-arrive 2s 0.3s var(--bz-ease-inscribe) forwards,
             bz-iso-drift  18s 2.3s ease-in-out infinite;
}
[data-design="a"] .bz-iso--2 {
  animation: bz-iso-arrive 2s 0.8s var(--bz-ease-inscribe) forwards,
             bz-iso-drift  22s 2.8s ease-in-out infinite;
}
[data-design="a"] .bz-iso--3 {
  animation: bz-iso-arrive 2s 1.3s var(--bz-ease-inscribe) forwards,
             bz-iso-drift  26s 3.3s ease-in-out infinite;
}
/* Gradient stops for isotherms */
[data-design="a"] .bz-tg-cool {
  stop-color: hsl(196, 55%, 45%);
  stop-opacity: 0.55;
}
[data-design="a"] .bz-tg-warm {
  stop-color: hsl(32, 60%, 52%);
  stop-opacity: 0.35;
}

/* Hero content */
[data-design="a"] .bz-hero__inner {
  position: relative; z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(32px, 5vw, 72px);
  max-width: 1200px; width: 100%; margin: 0 auto;
  padding: clamp(64px, 9vw, 120px) clamp(20px, 5vw, 48px);
  flex-wrap: wrap;
}
[data-design="a"] .bz-hero__copy {
  flex: 1 1 320px;
  display: flex; flex-direction: column; gap: 20px;
  max-width: 600px;
}
/* Text opacity:1 at first paint — never opacity-gated */
[data-design="a"] .bz-hero__headline {
  font-family: 'Cormorant SC', 'Trajan Pro', Georgia, serif;
  font-size: clamp(28px, 4.5vw, 60px);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.08;
  color: var(--bz-vellum);
  text-shadow: 0 2px 24px rgba(0,0,0,0.4);
  opacity: 1;  /* explicit: always visible */
}
[data-design="a"] .bz-hero__subtitle {
  font-family: 'Roboto Slab', 'Rockwell', Georgia, serif;
  font-size: clamp(14px, 1.8vw, 18px);
  color: color-mix(in oklab, var(--bz-vellum), var(--bz-rule) 25%);
  letter-spacing: 0.04em;
  line-height: 1.4;
  opacity: 1;
}
[data-design="a"] .bz-hero__proof {
  font-family: ui-monospace, 'JetBrains Mono', Menlo, monospace;
  font-size: clamp(12px, 1.3vw, 14px);
  color: var(--bz-brass);
  letter-spacing: 0.08em;
  opacity: 1;
}
[data-design="a"] .bz-trust-chip {
  display: inline-block;
  font-family: 'Cormorant SC', Georgia, serif;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--bz-vellum);
  border: 1px solid color-mix(in oklab, var(--bz-brass), transparent 40%);
  padding: 6px 14px;
  border-radius: var(--bz-radius-1);
  background: color-mix(in oklab, var(--bz-indigo), transparent 60%);
  width: fit-content;
  opacity: 1;
}

/* Dial mount — bare centering container, no box/label/card */
[data-design="a"] .bz-hero__dial-wrap {
  flex: 0 0 auto;
  display: flex; align-items: center; justify-content: center;
  width: clamp(200px, 30vw, 280px);
  --cd-cool:  #245c5e;
  --cd-warm:  #c4a062;
  --cd-face:  #f3ead4;
  --cd-ring:  #1d2848;
  --cd-needle: #8b6a2f;
  --cd-text:  #1c2528;
}
[data-design="a"] .bz-dial-mount {
  width: 100%;
  display: flex; align-items: center; justify-content: center;
}

/* Hero thermal pulse keyframe */
@keyframes bz-thermal-pulse {
  0%, 100% { filter: brightness(1);    }
  50%      { filter: brightness(1.06); }
}
@keyframes bz-iso-arrive {
  from { opacity: 0; stroke-dashoffset: 200; stroke-dasharray: 200; }
  to   { opacity: 1; stroke-dashoffset: 0;   stroke-dasharray: none; }
}
@keyframes bz-iso-drift {
  0%, 100% { transform: translateY(0px);  }
  50%      { transform: translateY(-8px); }
}

@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .bz-hero__thermal-field { animation: none; }
  [data-design="a"] .bz-iso {
    opacity: 0.45; animation: none;
    stroke-dashoffset: 0 !important; stroke-dasharray: none !important;
  }
}
@media (max-width: 768px) {
  [data-design="a"] .bz-hero__inner { flex-direction: column; gap: 40px; }
  [data-design="a"] .bz-hero__dial-wrap {
    width: clamp(160px, 55vw, 240px); order: -1;
  }
}

/* ═══════════════════════════════════════════════════════════════════
   E2 — ANIMATED CTA (brass cartouche — hero + drawer)
═══════════════════════════════════════════════════════════════════ */
[data-design="a"] .bz-cta {
  position: relative; isolation: isolate;
  display: inline-flex; align-items: center; gap: 14px;
  padding: 16px 28px; border-radius: var(--bz-radius-cartouche);
  background: var(--bz-indigo); color: var(--bz-vellum);
  font-family: 'Cormorant SC', 'Trajan Pro', Georgia, serif;
  font-size: 16px; letter-spacing: 0.18em; text-transform: uppercase;
  text-decoration: none; cursor: pointer;
  overflow: hidden;
  transition:
    transform 220ms var(--bz-ease-settle),
    background 200ms ease;
  will-change: transform;
  min-height: 44px;
}
[data-design="a"] .bz-cta__inset {
  position: absolute; inset: 4px; pointer-events: none;
  border: 1px solid var(--bz-brass);
  border-radius: 2px;
  animation: bz-cta-pulse var(--bz-pulse) var(--bz-ease-engine) infinite;
}
[data-design="a"] .bz-cta__arrow {
  display: inline-flex;
  transition: transform 220ms var(--bz-ease-settle);
  flex-shrink: 0;
}
[data-design="a"] .bz-cta:focus-visible .bz-cta__arrow { transform: translateX(4px); }
@media (hover: hover) and (pointer: fine) {
  [data-design="a"] .bz-cta:hover .bz-cta__arrow { transform: translateX(4px); }
  [data-design="a"] .bz-cta:hover .bz-cta__inset {
    border-color: color-mix(in oklab, var(--bz-brass), white 25%);
    animation-duration: 2400ms;
  }
}
[data-design="a"] .bz-cta:focus-visible {
  outline: 2px solid var(--bz-brass); outline-offset: 4px;
}
[data-design="a"] .bz-cta:active { transform: translateY(2px) scale(0.99); }
[data-design="a"] .bz-cta__ink {
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(circle at var(--ink-x, 50%) var(--ink-y, 50%),
    color-mix(in oklab, var(--bz-vellum), transparent 70%) 0%, transparent 60%);
  opacity: 0;
}
[data-design="a"] .bz-cta.bz-stamping .bz-cta__ink {
  animation: bz-cta-ink 480ms var(--bz-ease-settle) 1;
}
@keyframes bz-cta-pulse {
  0%, 100% { transform: scale(1);     opacity: 0.8; }
  50%      { transform: scale(1.012); opacity: 1;   }
}
@keyframes bz-cta-ink {
  0%   { opacity: 0.8; transform: scale(0.4); }
  100% { opacity: 0;   transform: scale(2.2); }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .bz-cta__inset { animation: none; }
  [data-design="a"] .bz-cta__arrow { transition: none; }
  [data-design="a"] .bz-cta.bz-stamping .bz-cta__ink { animation: none; opacity: 0; }
}

/* ═══════════════════════════════════════════════════════════════════
   E6 — POINTER (thermal-flow register; between hero and funnel)
   Wrapper must be opacity:1, height ≥ 8px — NEVER reveal-gated
═══════════════════════════════════════════════════════════════════ */
[data-design="a"] .bz-pointer {
  display: flex;
  justify-content: center;
  padding: clamp(40px, 8vw, 80px) 16px clamp(56px, 10vw, 96px);
  opacity: 1;              /* HARD: visible at all breakpoints */
  background: var(--bz-vellum);
  /* Thermal warm wash descends toward funnel */
  background: linear-gradient(
    to bottom,
    var(--bz-vellum) 0%,
    color-mix(in oklab, var(--bz-vellum), hsl(32,40%,85%) 20%) 100%
  );
}
[data-design="a"] .bz-pointer__track {
  position: relative;
  width: 2px;
  height: 96px;
  display: flex; flex-direction: column; align-items: center;
}
[data-design="a"] .bz-pointer__pipe {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom,
    transparent 0%,
    color-mix(in oklab, var(--bz-brass), var(--bz-glaze) 50%) 100%);
  transform-origin: top center;
  animation: bz-pointer-fill 5s ease-in-out infinite;
  opacity: 0.7;
}
[data-design="a"] .bz-pointer__drop {
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 8px; height: 8px;
  margin-left: -4px;
  background: var(--bz-brass);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  transform: translateY(-72px) scale(0.4);
  opacity: 0;
  animation: bz-pointer-drip 5s ease-in infinite;
}
[data-design="a"] .bz-pointer__warmline {
  position: absolute; bottom: 0; left: 50%;
  width: 48px; height: 1px; margin-left: -24px;
  background: linear-gradient(to right,
    transparent, var(--bz-brass), transparent);
  animation: bz-pointer-warmline 5s ease-in-out infinite;
  opacity: 0;
}
@keyframes bz-pointer-fill {
  0%, 100% { transform: scaleY(0.4); opacity: 0.45; }
  60%      { transform: scaleY(1);   opacity: 0.85; }
}
@keyframes bz-pointer-drip {
  0%, 55%  { transform: translateY(-72px) scale(0.4); opacity: 0; }
  70%      { transform: translateY(-72px) scale(1);   opacity: 1; }
  92%      { transform: translateY(0)     scale(1);   opacity: 1; }
  100%     { transform: translateY(0)     scale(0.2); opacity: 0; }
}
@keyframes bz-pointer-warmline {
  0%, 50%  { opacity: 0; transform: scaleX(0.3); }
  80%      { opacity: 0.6; transform: scaleX(1); }
  100%     { opacity: 0; transform: scaleX(1.2); }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .bz-pointer__pipe,
  [data-design="a"] .bz-pointer__drop,
  [data-design="a"] .bz-pointer__warmline { animation: none; opacity: 0.5; }
}

/* ═══════════════════════════════════════════════════════════════════
   E5 — TAP-QUALIFY FUNNEL (Job Ticket adapted to HVAC planning mode)
   id="funnel", data-mf-role="funnel"
   Thermal warm spine: funnel is the warm end of cool→warm
═══════════════════════════════════════════════════════════════════ */
[data-design="a"] .bz-ticket {
  max-width: 880px; margin: 0 auto;
  padding: clamp(56px, 8vw, 96px) clamp(16px, 4vw, 40px);
  display: flex; flex-direction: column; gap: 28px;
  /* Thermal warm: funnel background warms as --thermal-temp rises */
  background: color-mix(in oklab, var(--bz-vellum),
    hsl(32, 50%, 88%) calc(var(--thermal-temp) * 12%));
  transition: background 600ms ease;
}
[data-design="a"] .bz-ticket__head { display: flex; flex-direction: column; gap: 10px; }
[data-design="a"] .bz-ticket__eyebrow {
  font-family: 'Cormorant SC', Georgia, serif;
  text-transform: uppercase; letter-spacing: 0.18em;
  font-size: 13px; color: var(--bz-brass);
}
[data-design="a"] .bz-ticket__title {
  font-family: 'Cormorant SC', 'Trajan Pro', Georgia, serif;
  font-size: clamp(28px, 3.6vw, 44px); letter-spacing: 0.04em;
  color: var(--bz-iron); margin: 0; line-height: 1.1;
}
[data-design="a"] .bz-ticket__lede {
  font-family: 'Source Serif 4', Georgia, serif; font-size: 17px;
  line-height: 1.55; color: var(--bz-iron); margin: 0;
}
/* Progress pips */
[data-design="a"] .bz-ticket__progress {
  display: flex; gap: 14px; padding-bottom: 14px;
  border-bottom: 1px solid var(--bz-rule);
}
[data-design="a"] .bz-ticket__pip {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: ui-monospace, monospace; font-size: 12px;
  width: 32px; height: 32px; min-width: 32px;
  border: 1px solid var(--bz-rule); border-radius: 2px;
  color: var(--bz-muted); background: var(--bz-vellum);
  transition: border-color 200ms, color 200ms, background 200ms;
}
[data-design="a"] .bz-ticket__pip.is-active { border-color: var(--bz-brass); color: var(--bz-iron); }
[data-design="a"] .bz-ticket__pip.is-done {
  background: var(--bz-indigo); color: var(--bz-vellum); border-color: var(--bz-indigo);
}

/* Form */
[data-design="a"] .bz-ticket__form {
  border: 1px solid var(--bz-rule);
  padding: clamp(20px, 3vw, 36px);
  background: var(--bz-vellum);
}
[data-design="a"] .bz-folio { border: 0; padding: 0; margin: 0; }
[data-design="a"] .bz-folio[hidden] { display: none; }
[data-design="a"] .bz-folio.is-active {
  animation: bz-folio-in 320ms var(--bz-ease-settle) forwards;
}
[data-design="a"] .bz-folio__legend {
  font-family: 'Cormorant SC', Georgia, serif;
  text-transform: uppercase; letter-spacing: 0.16em;
  font-size: 18px; color: var(--bz-iron);
  margin-bottom: 18px; padding: 0; display: block;
  width: 100%;
}
[data-design="a"] .bz-folio__choices {
  display: grid; gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}
[data-design="a"] .bz-choice {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--bz-rule); padding: 16px;
  cursor: pointer; background: var(--bz-vellum);
  font-family: 'Source Serif 4', Georgia, serif; font-size: 16px;
  color: var(--bz-iron);
  transition: border-color 80ms ease, background 80ms ease;
  min-height: 44px;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="a"] .bz-choice:hover { border-color: var(--bz-brass); }
}
[data-design="a"] .bz-choice input { accent-color: var(--bz-indigo); flex-shrink: 0; }
[data-design="a"] .bz-choice:has(input:checked) {
  border-color: var(--bz-indigo);
  background: color-mix(in oklab, var(--bz-indigo), var(--bz-vellum) 92%);
}

/* Contact action (step 4) */
[data-design="a"] .bz-contact-action { display: flex; flex-direction: column; gap: 20px; }
[data-design="a"] .bz-contact-urgent[hidden] { display: none; }
[data-design="a"] .bz-contact-urgent {
  display: flex; flex-direction: column; gap: 16px; align-items: flex-start;
}
[data-design="a"] .bz-contact-plan {
  display: flex; flex-direction: column; gap: 0;
}
[data-design="a"] .bz-contact-urgent__copy {
  font-family: 'Source Serif 4', Georgia, serif; font-size: 17px;
  line-height: 1.55; color: var(--bz-iron);
}
[data-design="a"] .bz-contact-urgent__cta { font-size: 18px; }

/* Fields */
[data-design="a"] .bz-field {
  display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px;
}
[data-design="a"] .bz-field__label {
  font-family: 'Cormorant SC', Georgia, serif;
  text-transform: uppercase; letter-spacing: 0.14em;
  font-size: 12px; color: var(--bz-muted);
}
[data-design="a"] .bz-field__optional {
  text-transform: none; letter-spacing: 0;
  font-family: 'Source Serif 4', Georgia, serif; font-size: 12px;
}
[data-design="a"] .bz-field input {
  border: 0; border-bottom: 1px solid var(--bz-rule);
  background: transparent; padding: 8px 0; font-size: 17px;
  font-family: 'Source Serif 4', Georgia, serif; color: var(--bz-iron);
  outline: none;
  transition: border-color 200ms;
  width: 100%;
}
[data-design="a"] .bz-field input:focus { border-bottom: 2px solid var(--bz-glaze); }

/* Nav + stamps */
[data-design="a"] .bz-ticket__nav { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
[data-design="a"] .bz-stamp {
  font-family: 'Cormorant SC', Georgia, serif;
  text-transform: uppercase; letter-spacing: 0.16em; font-size: 13px;
  padding: 12px 22px; cursor: pointer; border-radius: 2px;
  transition: background 160ms ease, transform 80ms ease;
  min-height: 44px; min-width: 80px;
}
[data-design="a"] .bz-stamp--primary {
  background: var(--bz-indigo); color: var(--bz-vellum);
  border: 1px solid var(--bz-indigo);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="a"] .bz-stamp--primary:hover {
    background: color-mix(in oklab, var(--bz-indigo), black 10%);
  }
}
[data-design="a"] .bz-stamp--primary:active { transform: translateY(1px); }
[data-design="a"] .bz-stamp--secondary {
  background: var(--bz-vellum); color: var(--bz-iron);
  border: 1px solid var(--bz-rule);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="a"] .bz-stamp--secondary:hover { border-color: var(--bz-brass); }
}
[data-design="a"] .bz-stamp[hidden] { display: none; }

/* Receipt */
[data-design="a"] .bz-ticket__receipt[hidden] { display: none; }
[data-design="a"] .bz-ticket__receipt {
  border: 1px solid var(--bz-brass); padding: clamp(20px, 3vw, 36px);
  background: var(--bz-vellum);
  animation: bz-receipt-stamp 460ms var(--bz-ease-settle) forwards;
  text-align: center;
}
[data-design="a"] .bz-cartouche-final {
  display: inline-flex; flex-direction: column; gap: 6px;
  padding: 16px 32px; border: 1.5px solid var(--bz-brass);
  background: color-mix(in oklab, var(--bz-brass), var(--bz-vellum) 88%);
  border-radius: 3px;
}
[data-design="a"] .bz-cartouche-final__eyebrow {
  font-family: 'Cormorant SC', Georgia, serif; text-transform: uppercase;
  letter-spacing: 0.2em; font-size: 13px; color: var(--bz-brass);
}
[data-design="a"] .bz-cartouche-final__no {
  font-family: ui-monospace, monospace; font-size: 14px; color: var(--bz-iron);
}
[data-design="a"] .bz-ticket__thanks {
  font-family: 'Source Serif 4', Georgia, serif; font-size: 17px;
  color: var(--bz-iron); margin-top: 20px; line-height: 1.55;
}
[data-design="a"] .bz-ticket__thanks a { color: var(--bz-indigo); }

/* Funnel keyframes */
@keyframes bz-folio-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0);   }
}
@keyframes bz-receipt-stamp {
  0%   { opacity: 0; transform: scale(0.96); }
  60%  { opacity: 1; transform: scale(1.01); }
  100% { opacity: 1; transform: scale(1);    }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .bz-folio.is-active,
  [data-design="a"] .bz-ticket__receipt { animation: none; }
}
@media (max-width: 560px) {
  [data-design="a"] .bz-folio__choices { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════════════
   SERVICES (roman index)
═══════════════════════════════════════════════════════════════════ */
[data-design="a"] .bz-services {
  max-width: 1200px; margin: 0 auto;
  padding: clamp(56px, 8vw, 96px) clamp(16px, 4vw, 40px);
  border-top: 1px solid var(--bz-rule);
}
[data-design="a"] .bz-services__head {
  display: flex; flex-direction: column; gap: 12px;
  max-width: 64ch; margin-bottom: clamp(32px, 5vw, 56px);
}
[data-design="a"] .bz-services__eyebrow {
  font-family: 'Cormorant SC', Georgia, serif;
  text-transform: uppercase; letter-spacing: 0.18em;
  font-size: 13px; color: var(--bz-brass);
}
[data-design="a"] .bz-services__title {
  font-family: 'Cormorant SC', Georgia, serif;
  font-size: clamp(28px, 3.6vw, 44px); letter-spacing: 0.04em;
  color: var(--bz-iron); line-height: 1.1;
}
[data-design="a"] .bz-services__lede {
  font-size: 17px; line-height: 1.55; color: var(--bz-iron);
}
[data-design="a"] .bz-service-list { display: flex; flex-direction: column; gap: 0; }
[data-design="a"] .bz-service-item {
  display: flex; align-items: baseline; gap: clamp(16px, 3vw, 32px);
  padding: clamp(16px, 2.5vw, 24px) 0;
  border-bottom: 1px solid var(--bz-rule);
}
[data-design="a"] .bz-service-item__num {
  font-family: ui-monospace, 'JetBrains Mono', Menlo, monospace;
  font-size: 13px; color: var(--bz-brass);
  min-width: 32px; flex-shrink: 0;
}
[data-design="a"] .bz-service-item__body { display: flex; flex-direction: column; gap: 4px; }
[data-design="a"] .bz-service-item__name {
  font-family: 'Roboto Slab', 'Rockwell', Georgia, serif;
  font-size: clamp(17px, 2vw, 20px); color: var(--bz-iron);
  font-weight: 700; margin: 0;
}
[data-design="a"] .bz-service-item__desc {
  font-size: 16px; line-height: 1.55; color: var(--bz-muted); margin: 0;
}

/* ═══════════════════════════════════════════════════════════════════
   E3: ABOUT + BEAM ENGINE (ambient mid-page)
═══════════════════════════════════════════════════════════════════ */
[data-design="a"] .bz-engine {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 4vw, 64px);
  padding: clamp(56px, 8vw, 96px) clamp(16px, 4vw, 40px);
  max-width: 1200px; margin: 0 auto;
  align-items: center;
  border-top: 1px solid var(--bz-rule);
}
[data-design="a"] .bz-engine__copy { display: flex; flex-direction: column; gap: 16px; }
[data-design="a"] .bz-engine__eyebrow {
  font-family: 'Cormorant SC', Georgia, serif;
  text-transform: uppercase; letter-spacing: 0.18em;
  font-size: 13px; color: var(--bz-brass);
}
[data-design="a"] .bz-engine__title {
  font-family: 'Cormorant SC', Georgia, serif;
  font-size: clamp(28px, 3.6vw, 44px); letter-spacing: 0.04em;
  line-height: 1.05; color: var(--bz-iron);
}
[data-design="a"] .bz-engine__body {
  font-size: 17px; line-height: 1.55; color: var(--bz-iron);
  display: flex; flex-direction: column; gap: 14px;
}
[data-design="a"] .bz-engine__credentials {
  display: flex; flex-wrap: wrap; gap: 8px;
}
[data-design="a"] .bz-cartouche {
  font-family: ui-monospace, monospace; font-size: 12px;
  letter-spacing: 0.08em;
  border: 1px solid var(--bz-brass);
  padding: 4px 10px; border-radius: 2px;
  color: var(--bz-iron); background: var(--bz-vellum);
}
[data-design="a"] .bz-engine__service-area {
  font-size: 15px; color: var(--bz-muted); line-height: 1.4;
}
[data-design="a"] .bz-engine__plate {
  border: 1px solid var(--bz-rule); background: var(--bz-vellum); padding: 16px;
  color: var(--bz-iron);
}
[data-design="a"] .bz-engine__svg { width: 100%; height: auto; display: block; }
/* Beam engine animations */
[data-design="a"] .bz-engine__beam {
  transform-origin: 200px 100px;
  animation: bz-beam-rock var(--bz-pulse) var(--bz-ease-engine) infinite;
}
[data-design="a"] .bz-engine__water {
  animation: bz-beam-water var(--bz-pulse) var(--bz-ease-engine) infinite;
}
[data-design="a"] .bz-engine__wheel {
  animation: bz-beam-wheel 12000ms linear infinite;
}
@keyframes bz-beam-rock {
  0%, 100% { transform: rotate(-3deg); }
  50%      { transform: rotate(3deg);  }
}
@keyframes bz-beam-water {
  0%, 100% { y: 200; height: 79;  }
  50%      { y: 140; height: 139; }
}
@keyframes bz-beam-wheel {
  from { transform: rotate(0deg);   }
  to   { transform: rotate(360deg); }
}
[data-design="a"] .bz-engine.is-paused .bz-engine__beam,
[data-design="a"] .bz-engine.is-paused .bz-engine__water,
[data-design="a"] .bz-engine.is-paused .bz-engine__wheel {
  animation-play-state: paused;
}
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .bz-engine__beam,
  [data-design="a"] .bz-engine__water,
  [data-design="a"] .bz-engine__wheel { animation-play-state: paused; }
}
@media (max-width: 768px) {
  [data-design="a"] .bz-engine { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════════════
   E4 — SECTIONAL PLATE (inscribes on scroll-into-view)
═══════════════════════════════════════════════════════════════════ */
[data-design="a"] .bz-section {
  max-width: 1200px; margin: 0 auto;
  padding: clamp(56px, 8vw, 96px) clamp(16px, 4vw, 40px);
  display: grid; grid-template-columns: 1fr; gap: 32px;
  border-top: 1px solid var(--bz-rule);
}
[data-design="a"] .bz-section__head {
  display: flex; flex-direction: column; gap: 12px; max-width: 64ch;
}
[data-design="a"] .bz-section__eyebrow {
  font-family: 'Cormorant SC', Georgia, serif;
  text-transform: uppercase; letter-spacing: 0.18em;
  font-size: 13px; color: var(--bz-brass);
}
[data-design="a"] .bz-section__title {
  font-family: 'Cormorant SC', Georgia, serif;
  font-size: clamp(24px, 3vw, 38px); letter-spacing: 0.04em;
  line-height: 1.15; color: var(--bz-iron);
}
[data-design="a"] .bz-section__lede {
  font-size: 17px; line-height: 1.55; color: var(--bz-iron);
}
[data-design="a"] .bz-section__plate {
  border: 1px solid var(--bz-rule); background: var(--bz-vellum);
  padding: clamp(16px, 3vw, 28px); color: var(--bz-iron);
}
[data-design="a"] .bz-section__svg { width: 100%; height: auto; display: block; }
[data-design="a"] .bz-section__legend {
  font-family: ui-monospace, monospace; font-size: 13px; color: var(--bz-muted);
}
/* Inscribe-on-scroll */
[data-design="a"] .bz-line {
  stroke-dasharray: 100; stroke-dashoffset: 100;
}
[data-design="a"] .bz-line--rect {
  stroke-dasharray: 280; stroke-dashoffset: 280;
}
[data-design="a"] .bz-callout { opacity: 0; }
[data-design="a"] .bz-section.is-drawn .bz-line {
  animation: bz-inscribe var(--bz-inscribe) var(--bz-ease-inscribe) forwards;
}
[data-design="a"] .bz-section.is-drawn .bz-line:nth-of-type(2) { animation-delay: 200ms; }
[data-design="a"] .bz-section.is-drawn .bz-line:nth-of-type(3) { animation-delay: 400ms; }
[data-design="a"] .bz-section.is-drawn .bz-line:nth-of-type(4) { animation-delay: 600ms; }
[data-design="a"] .bz-section.is-drawn .bz-line:nth-of-type(5) { animation-delay: 800ms; }
[data-design="a"] .bz-section.is-drawn .bz-line:nth-of-type(6) { animation-delay: 1000ms; }
[data-design="a"] .bz-section.is-drawn .bz-line:nth-of-type(7) { animation-delay: 1200ms; }
[data-design="a"] .bz-section.is-drawn .bz-line:nth-of-type(8) { animation-delay: 1400ms; }
[data-design="a"] .bz-section.is-drawn .bz-line--rect { animation-delay: 1600ms; }
[data-design="a"] .bz-section.is-drawn .bz-callout {
  animation: bz-callout-pop 380ms var(--bz-ease-settle) forwards;
}
[data-design="a"] .bz-section.is-drawn .bz-callout:nth-of-type(1) { animation-delay: 1900ms; }
[data-design="a"] .bz-section.is-drawn .bz-callout:nth-of-type(2) { animation-delay: 2050ms; }
[data-design="a"] .bz-section.is-drawn .bz-callout:nth-of-type(3) { animation-delay: 2200ms; }
@keyframes bz-inscribe {
  to { stroke-dashoffset: 0; }
}
@keyframes bz-callout-pop {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0);   }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .bz-line { stroke-dashoffset: 0; animation: none !important; }
  [data-design="a"] .bz-callout { opacity: 1; animation: none !important; }
}
@media (max-width: 560px) {
  [data-design="a"] .bz-section__plate { padding: 12px; }
}

/* ═══════════════════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════════════════ */
[data-design="a"] .bz-footer {
  background: var(--bz-iron); color: var(--bz-vellum);
  border-top: 1px solid var(--bz-rule);
  padding: clamp(40px, 6vw, 80px) clamp(16px, 4vw, 40px);
}
[data-design="a"] .bz-footer__course {
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--bz-brick) 0 var(--bz-course),
    transparent var(--bz-course) calc(var(--bz-course) * 2)
  );
  margin-bottom: 32px; opacity: 0.5;
}
[data-design="a"] .bz-footer__inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 32px;
  justify-content: space-between; align-items: flex-start;
}
[data-design="a"] .bz-footer__brand,
[data-design="a"] .bz-footer__contact,
[data-design="a"] .bz-footer__credentials {
  display: flex; flex-direction: column; gap: 6px;
}
[data-design="a"] .bz-footer__name {
  font-family: 'Cormorant SC', Georgia, serif;
  font-size: 18px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--bz-vellum);
}
[data-design="a"] .bz-footer__area {
  font-family: ui-monospace, monospace; font-size: 13px; color: var(--bz-muted);
}
[data-design="a"] .bz-footer__phone {
  font-family: 'Roboto Slab', Georgia, serif;
  font-size: 18px; color: var(--bz-brass); text-decoration: none;
}
[data-design="a"] .bz-footer__fb {
  font-family: ui-monospace, monospace; font-size: 13px;
  color: var(--bz-muted); text-decoration: none;
}
[data-design="a"] .bz-footer__credentials span {
  font-family: ui-monospace, monospace; font-size: 12px; color: var(--bz-muted);
  letter-spacing: 0.04em;
}

/* ═══════════════════════════════════════════════════════════════════
   SCROLL-LINKED THERMAL WARMING (TRIAD-2 premium scroll motion)
   Visual class toggling via JS — sections reveal with scroll-linked
   opacity+translateY driven by IntersectionObserver proxy
   The true scroll-link: --thermal-temp updated via scrollY in JS
═══════════════════════════════════════════════════════════════════ */
/* Thermal color blends warm toward funnel */
[data-design="a"] .bz-services,
[data-design="a"] .bz-engine {
  /* subtle cool tint at top of page */
  background: color-mix(in oklab, var(--bz-vellum),
    hsl(196, 30%, 90%) calc((1 - var(--thermal-temp)) * 6%));
  transition: background 400ms ease;
}
/* Scroll-reveal for sections: enter with translate → settle */
[data-design="a"] .bz-service-item {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 500ms var(--bz-ease-settle),
              transform 500ms var(--bz-ease-settle);
}
[data-design="a"] .bz-service-item.is-visible {
  opacity: 1; transform: translateY(0);
}
/* Stagger delays */
[data-design="a"] .bz-service-item:nth-child(1) { transition-delay: 0ms;   }
[data-design="a"] .bz-service-item:nth-child(2) { transition-delay: 80ms;  }
[data-design="a"] .bz-service-item:nth-child(3) { transition-delay: 160ms; }
[data-design="a"] .bz-service-item:nth-child(4) { transition-delay: 240ms; }
[data-design="a"] .bz-service-item:nth-child(5) { transition-delay: 320ms; }

@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .bz-service-item {
    opacity: 1; transform: none; transition: none;
  }
}

/* ═══════════════════════════════════════════════════════════════════
   MOBILE NO-H-SCROLL GUARD (HARD contract — scoped to .dq-design)
═══════════════════════════════════════════════════════════════════ */
[data-design="a"].dq-design,
[data-design="a"] .dq-design {
  max-width: 100%;
  overflow-x: clip;
}
[data-design="a"].dq-design * {
  min-width: 0;
}
[data-design="a"].dq-design img,
[data-design="a"].dq-design svg:not([data-keep-size]) {
  max-width: 100%;
  height: auto;
}
/* Also apply to root article when it IS .dq-design */
[data-design="a"] {
  max-width: 100%;
  overflow-x: clip;
}
[data-design="a"].dq-design * { min-width: 0; }
[data-design="a"].dq-design img,
[data-design="a"].dq-design svg:not([data-keep-size]) {
  max-width: 100%;
  height: auto;
}

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