/* ============================================================
   Mizu — Sento Water Room · Design Slot B (plumbing-houston)
   Scoped: [data-design="b"].dq-design
   All selectors prefixed [data-design="b"].dq-design to prevent chrome leakage
   Keyframes prefixed mizu- (collision-safe)
   Motion gate: ONLY transform / opacity / clip-path animated
   No transition/keyframe on width/height/max-height/padding/margin/top/left/right/bottom
   All :hover/:focus-visible transforms inside @media (hover:hover) and (pointer:fine)
   No scale(0) entry — minimum scale(0.92)
   ============================================================ */

/* ── Token block ─────────────────────────────────────────── */
[data-design="b"].dq-design {
  --mizu-shiro:   #F4EFE6;
  --mizu-cream:   #EBE2D0;
  --mizu-sumi:    #1A1612;
  --mizu-aizome:  #1B3A5C;
  --mizu-asagi:   #3E6F94;
  --mizu-mizu:    #A8C8DC;
  --mizu-hinoki:  #C9A876;
  --mizu-akane:   #9C3A2A;
  --mizu-matcha:  #5C7A4A;
  --mizu-mist:    rgba(27,58,92,0.08);

  --font-display: 'Cormorant Garamond', 'Hiragino Mincho ProN', 'Yu Mincho', 'Times New Roman', serif;
  --font-body:    'Inter', -apple-system, system-ui, 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-mono:    ui-monospace, 'JetBrains Mono', 'Hiragino Kaku Gothic ProN', monospace;

  --sp-drop:    4px;
  --sp-step:    8px;
  --sp-tile:    16px;
  --sp-shoji:   24px;
  --sp-tatami:  48px;
  --sp-ma:      96px;
  --sp-yu:      144px;

  --motion-settle:  cubic-bezier(0.22, 1, 0.36, 1);
  --motion-ripple:  cubic-bezier(0.16, 0.84, 0.44, 1);
  --motion-unfurl:  cubic-bezier(0.4, 0, 0.2, 1);
  --motion-inkdraw: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-drop:         240ms;
  --dur-ripple:       720ms;
  --dur-unfurl:       540ms;
  --dur-ambient-long: 24s;
  --dur-ambient-mid:  12s;

  --r-none:  0;
  --r-tile:  2px;
  --r-stone: 6px;
  --r-drop:  999px;

  --elev-flat: 0 0 0 1px var(--mizu-mist);
  --elev-pool: 0 1px 0 var(--mizu-mist), 0 18px 32px -16px rgba(27,58,92,0.18);

  --design-b-primary: var(--mizu-aizome);

  background: var(--mizu-shiro);
  color: var(--mizu-sumi);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
}

/* ── Anti-hscroll guards (scoped) ──────────────────────── */
[data-design="b"].dq-design,
[data-design="b"] .dq-design { max-width: 100%; overflow-x: clip; }
[data-design="b"].dq-design * { min-width: 0; box-sizing: border-box; }
[data-design="b"].dq-design img,
[data-design="b"].dq-design svg:not([data-keep-size]) { max-width: 100%; height: auto; }

/* ================================================================
   E1: HEADER — Mizu header (three things: wordmark + ripple + hamburger)
   H-1: logo + atmospheric layer + hamburger ONLY
   H-3: ripple cycle ≥ 18s (24s here)
   ================================================================ */
[data-design="b"] .rf-header {
  position: sticky; top: 0; z-index: 30;
  background: var(--mizu-shiro);
  padding: var(--sp-shoji) clamp(20px, 5vw, 56px);
  isolation: isolate;
}
[data-design="b"] .rf-header__bar {
  display: flex; align-items: center; justify-content: space-between;
  position: relative; z-index: 2;
}
[data-design="b"] .rf-logo { text-decoration: none; }
[data-design="b"] .rf-logo__mark {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 28px);
  letter-spacing: -0.01em;
  color: var(--mizu-sumi);
  font-weight: 500;
}
[data-design="b"] .rf-hamburger {
  appearance: none; background: transparent; border: 0; cursor: pointer;
  display: flex; flex-direction: column; gap: 6px;
  padding: 10px 6px; min-height: 44px; min-width: 44px;
  align-items: center; justify-content: center;
}
[data-design="b"] .rf-hamburger__rule {
  display: block; width: 28px; height: 1px; background: var(--mizu-sumi);
  transition: transform var(--dur-drop) var(--motion-settle);
}
[data-design="b"] .rf-hamburger[aria-expanded="true"] .rf-hamburger__rule:first-child {
  transform: translateY(3px) rotate(2deg);
}
[data-design="b"] .rf-hamburger[aria-expanded="true"] .rf-hamburger__rule:last-child {
  transform: translateY(-4px) rotate(-2deg);
}

/* Header hairline */
[data-design="b"] .rf-header__hairline {
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px; background: var(--mizu-aizome); opacity: 0.6;
}

/* Ripple atmosphere — 24s cycle, 3 staggered rings */
[data-design="b"] .rf-ripple {
  position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 1;
}
[data-design="b"] .rf-ripple__ring {
  position: absolute; top: 50%; right: clamp(72px, 12vw, 160px);
  width: 8px; height: 8px; border-radius: 50%;
  border: 1px solid var(--mizu-asagi); opacity: 0;
  transform: translate(50%, -50%) scale(1);
  animation: mizu-ripple var(--dur-ambient-long) var(--motion-ripple) infinite;
}
[data-design="b"] .rf-ripple__ring--b { animation-delay: 8s; }
[data-design="b"] .rf-ripple__ring--c { animation-delay: 16s; }
@keyframes mizu-ripple {
  0%   { opacity: 0;    transform: translate(50%, -50%) scale(1); }
  6%   { opacity: 0.55; }
  60%  { opacity: 0;    transform: translate(50%, -50%) scale(14); }
  100% { opacity: 0;    transform: translate(50%, -50%) scale(14); }
}

/* Noren drawer — full-screen, unfurl animation */
[data-design="b"] .rf-noren {
  position: fixed; inset: 0; z-index: 40;
  display: grid; pointer-events: none;
}
[data-design="b"] .rf-noren[hidden] { display: none; }
[data-design="b"] .rf-noren__panel {
  position: absolute; top: 0; bottom: 0; width: 50%;
  background: var(--mizu-shiro);
  transform: translateY(-100%);
  transition: transform var(--dur-unfurl) var(--motion-unfurl);
}
[data-design="b"] .rf-noren__panel--left  { left: 0; }
[data-design="b"] .rf-noren__panel--right { right: 0; transition-delay: 60ms; }
[data-design="b"] .rf-noren.is-open .rf-noren__panel { transform: translateY(0); }
[data-design="b"] .rf-noren__rule {
  position: absolute; top: 33%; left: 0; right: 0; height: 1px;
  background: var(--mizu-aizome); transform: scaleX(0); transform-origin: left;
  transition: transform 720ms var(--motion-ripple) 200ms; z-index: 1;
}
[data-design="b"] .rf-noren.is-open .rf-noren__rule { transform: scaleX(1); }
[data-design="b"] .rf-noren__list {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  list-style: none; padding: 0; margin: 0;
  font-family: var(--font-display); font-size: clamp(32px, 6vw, 56px);
  text-align: center; pointer-events: auto; z-index: 2;
  opacity: 0; transform: translateY(8px);
  transition: opacity 360ms var(--motion-settle) 320ms,
              transform 360ms var(--motion-settle) 320ms;
}
[data-design="b"] .rf-noren.is-open .rf-noren__list { opacity: 1; transform: translateY(0); }
[data-design="b"] .rf-noren__list li { margin: var(--sp-step) 0; }
[data-design="b"] .rf-noren__list a { color: var(--mizu-sumi); text-decoration: none; }
[data-design="b"] .rf-noren__phone {
  font-family: var(--font-body) !important;
  font-size: clamp(18px, 2.4vw, 22px) !important;
  color: var(--mizu-asagi) !important;
  letter-spacing: 0.04em !important;
}
[data-design="b"] .rf-noren__close {
  position: absolute; top: var(--sp-shoji); right: var(--sp-shoji); z-index: 3;
  background: transparent; border: 0; font-family: var(--font-body);
  font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--mizu-sumi); cursor: pointer; pointer-events: auto;
  opacity: 0; transition: opacity 240ms var(--motion-settle) 420ms;
  min-height: 44px; min-width: 44px;
}
[data-design="b"] .rf-noren.is-open .rf-noren__close { opacity: 1; }

@media (max-width: 560px) {
  [data-design="b"] .rf-ripple__ring { right: clamp(56px, 18vw, 96px); }
}
@media (max-width: 380px) {
  [data-design="b"] .rf-header { padding: var(--sp-tile) var(--sp-shoji); }
  [data-design="b"] .rf-logo__mark { font-size: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-ripple__ring {
    animation: none; opacity: 0.25; transform: translate(50%, -50%) scale(6);
  }
  [data-design="b"] .rf-noren__panel,
  [data-design="b"] .rf-noren__rule,
  [data-design="b"] .rf-noren__list { transition-duration: 0ms; }
}

/* ================================================================
   HERO — E2 + E3
   HARD: isolation:isolate on section; text z-index > backdrop
   HARD: opacity:1 first paint on ALL elements
   HERO-1: one animated layer (tile grid + glow + drip = one composite backdrop)
   HERO-2: no directional primitive
   HERO-3: dense, structured backdrop with visible color field + drawn strokes
   ================================================================ */
[data-design="b"] .b-hero {
  position: relative;
  min-height: 75vh;
  display: flex; align-items: center;
  overflow: hidden;
  isolation: isolate;           /* HARD: text topmost */
  background: var(--mizu-aizome);
}

/* Backdrop — pointer-events:none, z-index 0 */
[data-design="b"] .b-hero__backdrop {
  position: absolute; inset: 0; z-index: 0;
  pointer-events: none; overflow: hidden;
}

/* Tile grid SVG — dense structure, strong contrast on aizome background */
[data-design="b"] .b-hero__tiles {
  position: absolute; inset: 0; width: 100%; height: 100%;
  color: var(--mizu-mizu);
}

/* Gauge needle — rotate transform only, GPU safe */
[data-design="b"] .b-hero__gauge {
  color: var(--mizu-mizu);
}
[data-design="b"] .b-hero__gauge-needle {
  transform-origin: 0 0;
  animation: mizu-gauge-sweep 8s var(--motion-unfurl) 0.5s infinite alternate;
}
@keyframes mizu-gauge-sweep {
  0%   { transform: rotate(-50deg); }
  100% { transform: rotate(40deg); }
}

/* Vertical pipe draw-in — stroke-dashoffset (GPU) */
[data-design="b"] .b-hero__pipe-v {
  stroke: var(--mizu-mizu);
  animation: mizu-pipe-draw 2.4s var(--motion-settle) 0.2s forwards;
}
[data-design="b"] .b-hero__pipe-h {
  stroke: var(--mizu-mizu);
  animation: mizu-pipe-draw 2s var(--motion-settle) 0.8s forwards;
}
@keyframes mizu-pipe-draw { to { stroke-dashoffset: 0; } }

/* Joint dot appear */
[data-design="b"] .b-hero__joint {
  fill: var(--mizu-hinoki);
  opacity: 0;
  animation: mizu-joint-appear 0.5s var(--motion-settle) 2s forwards;
}
@keyframes mizu-joint-appear { to { opacity: 0.65; } }

/* Copper-glow halo — scale+opacity (GPU), VISIBLE ≥0.3 opacity, ≥30% area */
[data-design="b"] .b-hero__glow {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 30% 50%,
    rgba(201,168,118,0.38) 0%,
    rgba(27,58,92,0.18) 50%,
    transparent 75%);
  animation: mizu-glow-breath 6s var(--motion-unfurl) infinite alternate;
}
@keyframes mizu-glow-breath {
  0%   { opacity: 0.7; transform: scale(1); }
  100% { opacity: 1;   transform: scale(1.06); }
}

/* Drip trail — single droplet completes within 2s of load */
[data-design="b"] .b-hero__drip-track {
  position: absolute;
  left: 120px; top: 0; bottom: 0; width: 2px;
  pointer-events: none;
}
[data-design="b"] .b-hero__drip {
  position: absolute; left: -3px; top: 0;
  width: 8px; height: 10px;
  background: var(--mizu-hinoki);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  opacity: 0;
  animation: mizu-drip-fall 5s var(--motion-ripple) 0.3s infinite;
}
@keyframes mizu-drip-fall {
  0%   { opacity: 0;   transform: translateY(0); }
  8%   { opacity: 0.9; }
  85%  { opacity: 0.9; transform: translateY(90vh); }
  92%  { opacity: 0;   transform: translateY(92vh); }
  100% { opacity: 0;   transform: translateY(0); }
}

/* Hero content — z-index: 10 above all backdrop */
[data-design="b"] .b-hero__content {
  position: relative; z-index: 10;
  width: 100%;
  padding: clamp(80px, 12vh, 140px) clamp(20px, 5vw, 56px);
}
[data-design="b"] .b-hero__inner {
  max-width: 1280px; margin-inline: auto;
}

/* HARD: all hero text opacity:1 at first paint — NEVER opacity:0 */
[data-design="b"] .b-hero__headline {
  font-family: var(--font-display);
  font-size: clamp(40px, 6.5vw, 80px);
  line-height: 1.05; letter-spacing: -0.01em;
  color: var(--mizu-shiro);
  max-width: 16ch;
  margin: 0 0 var(--sp-shoji);
  opacity: 1;
  font-weight: 400;
}
[data-design="b"] .b-hero__subtitle {
  font-family: var(--font-body);
  font-size: clamp(16px, 1.8vw, 20px);
  line-height: 1.6; color: var(--mizu-mizu);
  max-width: 48ch; margin: 0 0 var(--sp-tatami);
  opacity: 1;
}
[data-design="b"] .b-hero__proof {
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--mizu-mizu); opacity: 1;
  margin: var(--sp-tile) 0 0;
}

/* ── E2: Phone CTA (rf-cta) ── */
[data-design="b"] .rf-cta {
  position: relative; display: inline-flex; align-items: center; gap: var(--sp-tile);
  padding: 18px 28px 18px 26px; min-height: 44px;
  background: var(--mizu-hinoki); color: var(--mizu-sumi);
  font-family: var(--font-body); font-size: 15px; letter-spacing: 0.06em;
  text-transform: uppercase; text-decoration: none;
  border-radius: var(--r-tile); overflow: hidden; isolation: isolate;
  transition: transform var(--dur-drop) var(--motion-settle),
              background var(--dur-drop) var(--motion-settle);
}
[data-design="b"] .rf-cta__label { position: relative; z-index: 2; opacity: 1; }
[data-design="b"] .rf-cta__drop {
  position: absolute; top: -10px; right: 22px; z-index: 2;
  width: 8px; height: 10px; background: var(--mizu-aizome);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  animation: mizu-cta-drop 5s var(--motion-ripple) infinite;
}
[data-design="b"] .rf-cta__ripple {
  position: absolute; top: 50%; right: 22px; z-index: 1;
  width: 6px; height: 6px; border: 1px solid var(--mizu-aizome);
  border-radius: 50%; opacity: 0; transform: translate(50%, -50%) scale(1);
  animation: mizu-cta-ring 5s var(--motion-ripple) infinite;
}
@keyframes mizu-cta-drop {
  0%, 70%  { transform: translateY(0);   opacity: 1; }
  78%      { transform: translateY(20px); opacity: 1; }
  82%      { transform: translateY(20px); opacity: 0; }
  100%     { transform: translateY(0);   opacity: 1; }
}
@keyframes mizu-cta-ring {
  0%, 78%  { opacity: 0;    transform: translate(50%, -50%) scale(1); }
  82%      { opacity: 0.85; transform: translate(50%, -50%) scale(1); }
  100%     { opacity: 0;    transform: translate(50%, -50%) scale(18); }
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-cta:hover { background: var(--mizu-shiro); }
  [data-design="b"] .rf-cta:hover .rf-cta__drop { animation-duration: 1.6s; }
}
[data-design="b"] .rf-cta:focus-visible {
  outline: none; box-shadow: 0 0 0 3px var(--mizu-mizu);
}
[data-design="b"] .rf-cta:active { transform: translateY(1px); }
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-cta__drop,
  [data-design="b"] .rf-cta__ripple { animation: none; opacity: 1; transform: none; }
}

@media (max-width: 768px) {
  [data-design="b"] .b-hero { min-height: 85vh; }
  [data-design="b"] .b-hero__content { padding-top: 72px; padding-bottom: 72px; }
}
@media (max-width: 390px) {
  [data-design="b"] .b-hero__headline { font-size: clamp(34px, 10vw, 56px); }
  [data-design="b"] .rf-cta { width: 100%; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .b-hero__gauge-needle { animation: none; transform: rotate(-20deg); }
  [data-design="b"] .b-hero__pipe-v,
  [data-design="b"] .b-hero__pipe-h { animation: none; stroke-dashoffset: 0; }
  [data-design="b"] .b-hero__joint { animation: none; opacity: 0.65; }
  [data-design="b"] .b-hero__glow { animation: none; opacity: 0.85; }
  [data-design="b"] .b-hero__drip { animation: none; opacity: 0; }
}

/* ================================================================
   E3: AMBIENT A — Services tile mosaic
   Tile glaze: opacity + transform only
   ================================================================ */
[data-design="b"] .rf-ambient-a {
  padding: var(--sp-yu) clamp(20px, 5vw, 56px);
  background: var(--mizu-shiro);
}
[data-design="b"] .rf-ambient-a__head {
  max-width: 720px; margin: 0 auto var(--sp-tatami);
}
[data-design="b"] .rf-eyebrow {
  font-family: var(--font-body); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--mizu-asagi); margin: 0 0 var(--sp-tile);
}
[data-design="b"] .rf-ambient-a__head h2 {
  font-family: var(--font-display); font-size: clamp(30px, 4.5vw, 44px);
  margin: 0; color: var(--mizu-sumi); line-height: 1.15; font-weight: 400;
}
[data-design="b"] .rf-tilegrid {
  list-style: none; margin: 0 auto; padding: 0; max-width: 1280px;
  display: grid; gap: 2px;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  background: var(--mizu-aizome);
  border: 1px solid var(--mizu-aizome);
}
[data-design="b"] .rf-tile {
  position: relative; padding: var(--sp-tatami) var(--sp-shoji);
  background: var(--mizu-aizome); color: var(--mizu-shiro);
  display: flex; flex-direction: column; gap: var(--sp-tile);
  isolation: isolate; overflow: hidden;
}
[data-design="b"] .rf-tile::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--mizu-asagi) 0%, var(--mizu-aizome) 60%);
  opacity: 0;
  animation: mizu-tile-glaze var(--dur-ambient-mid) var(--motion-ripple) infinite;
  z-index: 0;
}
[data-design="b"] .rf-tile:nth-child(7n+1)::before { animation-delay: 0s; }
[data-design="b"] .rf-tile:nth-child(7n+2)::before { animation-delay: 1.7s; }
[data-design="b"] .rf-tile:nth-child(7n+3)::before { animation-delay: 3.4s; }
[data-design="b"] .rf-tile:nth-child(7n+4)::before { animation-delay: 5.1s; }
[data-design="b"] .rf-tile:nth-child(7n+5)::before { animation-delay: 6.8s; }
[data-design="b"] .rf-tile:nth-child(7n+6)::before { animation-delay: 8.5s; }
[data-design="b"] .rf-tile:nth-child(7n+7)::before { animation-delay: 10.2s; }
@keyframes mizu-tile-glaze {
  0%, 100% { opacity: 0; }
  40%      { opacity: 0.45; }
  60%      { opacity: 0.45; }
}
[data-design="b"] .rf-tile > * { position: relative; z-index: 1; }
[data-design="b"] .rf-tile__num {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em;
  color: var(--mizu-mizu);
}
[data-design="b"] .rf-tile__name {
  font-family: var(--font-display); font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.2; font-weight: 400;
}
[data-design="b"] .rf-tile__range {
  font-family: var(--font-body); font-size: 13px;
  color: var(--mizu-mizu); margin-top: auto;
}
[data-design="b"] .rf-ambient-a.is-paused .rf-tile::before { animation-play-state: paused; }
[data-design="b"] .rf-ambient-a__cta {
  max-width: 1280px; margin: var(--sp-tatami) auto 0;
}
@media (max-width: 560px) {
  [data-design="b"] .rf-ambient-a { padding: var(--sp-tatami) var(--sp-shoji); }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-tile::before { animation: none; opacity: 0.2; }
}

/* ================================================================
   E4: AMBIENT B — Kanji draw-in + About copy
   Ink-draw: stroke-dashoffset (GPU, not a layout prop)
   ================================================================ */
[data-design="b"] .rf-ambient-b {
  padding: var(--sp-yu) clamp(20px, 5vw, 56px);
  background: var(--mizu-cream);
}
[data-design="b"] .rf-ambient-b__grid {
  display: grid; gap: var(--sp-tatami);
  grid-template-columns: minmax(220px, 1fr) minmax(0, 1.6fr);
  align-items: center; max-width: 1180px; margin: 0 auto;
}
@media (max-width: 768px) {
  [data-design="b"] .rf-ambient-b__grid { grid-template-columns: 1fr; }
}
[data-design="b"] .rf-kanji {
  margin: 0; display: flex; flex-direction: column; gap: var(--sp-tile);
  align-items: center;
}
[data-design="b"] .rf-kanji svg {
  width: clamp(160px, 22vw, 260px); height: auto; max-width: 100%;
}
[data-design="b"] .rf-kanji__stroke {
  fill: none; stroke: var(--mizu-aizome); stroke-width: 8;
  stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 240; stroke-dashoffset: 240;
  opacity: 0.78;
}
[data-design="b"] .rf-ambient-b.is-drawn .rf-kanji__stroke {
  animation: mizu-ink-draw 1.6s var(--motion-inkdraw) forwards,
             mizu-ink-breath 18s var(--motion-settle) 1.6s infinite;
}
[data-design="b"] .rf-ambient-b.is-drawn .rf-kanji__stroke:nth-child(2) { animation-delay: 220ms, 1.82s; }
[data-design="b"] .rf-ambient-b.is-drawn .rf-kanji__stroke:nth-child(3) { animation-delay: 440ms, 2.04s; }
[data-design="b"] .rf-ambient-b.is-drawn .rf-kanji__stroke:nth-child(4) { animation-delay: 660ms, 2.26s; }
[data-design="b"] .rf-ambient-b.is-drawn .rf-kanji__stroke:nth-child(5) { animation-delay: 880ms, 2.48s; }
@keyframes mizu-ink-draw { to { stroke-dashoffset: 0; } }
@keyframes mizu-ink-breath {
  0%, 100% { opacity: 0.78; }
  50%      { opacity: 0.92; }
}
[data-design="b"] .rf-kanji__caption {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--mizu-asagi);
}
[data-design="b"] .rf-ambient-b__body h2 {
  font-family: var(--font-display); font-size: clamp(28px, 4vw, 40px);
  margin: 0 0 var(--sp-shoji); color: var(--mizu-sumi); line-height: 1.2; font-weight: 400;
}
[data-design="b"] .rf-ambient-b__copy {
  font-family: var(--font-body); font-size: 17px; line-height: 1.7;
  color: var(--mizu-sumi); max-width: 60ch;
}
[data-design="b"] .rf-ambient-b__copy a { color: var(--mizu-asagi); }
[data-design="b"] .rf-ambient-b.is-paused .rf-kanji__stroke { animation-play-state: paused; }
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .rf-ambient-b .rf-kanji__stroke {
    animation: none; stroke-dashoffset: 0; opacity: 0.85;
  }
}

/* ================================================================
   SERVICE AREA section
   ================================================================ */
[data-design="b"] .b-area {
  padding: var(--sp-yu) clamp(20px, 5vw, 56px);
  background: var(--mizu-shiro);
}
[data-design="b"] .b-area__inner {
  max-width: 720px; margin: 0 auto;
}
[data-design="b"] .b-area__inner h2 {
  font-family: var(--font-display); font-size: clamp(28px, 4vw, 40px);
  margin: 0 0 var(--sp-shoji); color: var(--mizu-sumi); line-height: 1.2; font-weight: 400;
}
[data-design="b"] .b-area__body {
  font-size: clamp(16px, 1.6vw, 18px); line-height: 1.65;
  color: var(--mizu-sumi); max-width: 52ch; margin: 0 0 var(--sp-tatami);
}

/* ================================================================
   E6: POINTER — hydraulic-warm
   HARD: data-mf-role="pointer", LAST element before #funnel
   HARD: opacity:1, bounding-box height >8px (min-height: 120px)
   HARD: NOT a button, no directional arrow
   HARD: pointer→#funnel sibling gap = 0 (they are adjacent siblings)
   ================================================================ */
[data-design="b"] .mizu-pointer {
  display: flex;
  justify-content: center;
  padding: clamp(40px, 8vw, 80px) 16px clamp(56px, 10vw, 96px);
  background: var(--mizu-cream);
  opacity: 1;
  min-height: 120px;            /* HARD: >8px bounding-box height */
}
[data-design="b"] .mizu-pointer__hit {
  position: relative;
  display: inline-block;
  width: 2px;
  height: 96px;
  color: var(--mizu-aizome);
}
[data-design="b"] .mizu-pointer__pipe {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 0%, currentColor 100%);
  transform-origin: top center;
  animation: mizu-pointer-fill 5s ease-in-out infinite;
  opacity: 0.7;
}
[data-design="b"] .mizu-pointer__drop {
  position: absolute; left: 50%; bottom: -4px;
  width: 8px; height: 8px; margin-left: -4px;
  background: currentColor;
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  transform: translateY(-72px) scale(0.4);
  opacity: 0;
  animation: mizu-pointer-drip 5s ease-in infinite;
}
@keyframes mizu-pointer-fill {
  0%, 100% { transform: scaleY(0.4); opacity: 0.45; }
  60%      { transform: scaleY(1);   opacity: 0.85; }
}
@keyframes mizu-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; }
}
@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .mizu-pointer__pipe,
  [data-design="b"] .mizu-pointer__drop { animation: none; opacity: 0.5; }
}

/* ================================================================
   E5: FUNNEL — 5-step scheduling intake
   id="funnel" data-mf-role="funnel"
   ================================================================ */
[data-design="b"] .rf-interactive {
  padding: var(--sp-yu) clamp(20px, 5vw, 56px);
  background: var(--mizu-shiro);
}
[data-design="b"] .rf-interactive__head { max-width: 720px; margin-bottom: var(--sp-tatami); }
[data-design="b"] .rf-interactive__head h2 {
  font-family: var(--font-display); font-size: clamp(30px, 4.5vw, 44px);
  margin: 0 0 var(--sp-tile); color: var(--mizu-sumi); line-height: 1.15; font-weight: 400;
}
[data-design="b"] .rf-interactive__lede {
  font-family: var(--font-body); font-size: 17px; line-height: 1.6;
  color: var(--mizu-sumi); max-width: 56ch; margin: 0;
}

[data-design="b"] .b-funnel { max-width: 720px; position: relative; }

/* Step container */
[data-design="b"] .b-step { display: flex; flex-direction: column; gap: var(--sp-shoji); }
[data-design="b"] .b-step[hidden] { display: none; }
[data-design="b"] .b-step__label {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--mizu-asagi);
}

/* Choice tiles — funnel-option buttons */
[data-design="b"] .b-choices {
  display: grid; gap: 2px;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  background: var(--mizu-aizome); border: 1px solid var(--mizu-aizome);
}
[data-design="b"] .b-choice {
  appearance: none; border: 0; cursor: pointer;
  position: relative; isolation: isolate; overflow: hidden;
  background: var(--mizu-aizome); color: var(--mizu-shiro);
  padding: var(--sp-shoji) var(--sp-tile);
  min-height: 80px; text-align: left;
  display: flex; flex-direction: column; gap: var(--sp-step);
  transition: transform var(--dur-drop) var(--motion-settle),
              background var(--dur-drop) var(--motion-settle);
}
[data-design="b"] .b-choice::after {
  content: ""; position: absolute; left: 50%; top: 50%;
  width: 6px; height: 6px; border-radius: 50%;
  border: 1px solid var(--mizu-mizu); opacity: 0;
  transform: translate(-50%, -50%) scale(1);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .b-choice:hover { background: var(--mizu-asagi); }
}
[data-design="b"] .b-choice:focus-visible {
  outline: none; box-shadow: inset 0 0 0 2px var(--mizu-mizu);
}
[data-design="b"] .b-choice.is-selected {
  transform: translateY(-3px); background: var(--mizu-asagi); z-index: 2;
}
[data-design="b"] .b-choice.is-selected::after {
  animation: mizu-choice-ripple 720ms var(--motion-ripple) forwards;
}
@keyframes mizu-choice-ripple {
  0%   { opacity: 0.9; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0;   transform: translate(-50%, -50%) scale(28); }
}
[data-design="b"] .b-choice__num {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em;
  color: var(--mizu-mizu);
}
[data-design="b"] .b-choice__name {
  font-family: var(--font-display); font-size: clamp(17px, 2vw, 22px);
  line-height: 1.2; font-weight: 400;
}

/* Emergency CTA shortcut */
[data-design="b"] .b-emergency-cta {
  background: var(--mizu-cream); border: 1px solid var(--mizu-mist);
  padding: var(--sp-shoji); display: flex; flex-direction: column; gap: var(--sp-tile);
}
[data-design="b"] .b-emergency-cta p {
  font-family: var(--font-body); font-size: 15px; margin: 0; color: var(--mizu-sumi);
}
[data-design="b"] .b-emergency-note { color: var(--mizu-asagi) !important; font-size: 13px !important; }
[data-design="b"] .b-emergency-cta[hidden] { display: none; }

/* Input step */
[data-design="b"] .b-input-wrap { display: flex; flex-direction: column; gap: var(--sp-shoji); }
[data-design="b"] .rf-field { display: flex; flex-direction: column; gap: 6px; }
[data-design="b"] .rf-field__label {
  font-family: var(--font-body); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--mizu-asagi);
}
[data-design="b"] .rf-field__input {
  appearance: none; background: var(--mizu-shiro); color: var(--mizu-sumi);
  border: 0; border-bottom: 1px solid var(--mizu-aizome);
  padding: 12px 10px; font-family: var(--font-body); font-size: 15px;
  border-radius: 0; min-height: 44px;
  transition: border-color var(--dur-drop) var(--motion-settle);
}
[data-design="b"] .rf-field__input--area { min-height: 64px; resize: vertical; }
[data-design="b"] .rf-field__input:focus-visible {
  outline: none; border-bottom-color: var(--mizu-asagi);
  box-shadow: 0 1px 0 0 var(--mizu-asagi);
}
[data-design="b"] .b-area-note {
  font-family: var(--font-body); font-size: 13px; color: var(--mizu-asagi); margin: 0;
}

/* Form (step 5) */
[data-design="b"] .b-form { display: grid; gap: var(--sp-tile); }

/* Buttons: rf-stamp */
[data-design="b"] .rf-stamp {
  appearance: none; cursor: pointer;
  padding: 14px 22px; min-height: 44px; min-width: 44px;
  font-family: var(--font-body); font-size: 13px; letter-spacing: 0.1em;
  text-transform: uppercase; border-radius: var(--r-tile);
  text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
  transition: transform var(--dur-drop) var(--motion-settle),
              background var(--dur-drop) var(--motion-settle);
  border: 1px solid var(--mizu-aizome);
}
[data-design="b"] .rf-stamp--primary {
  background: var(--mizu-aizome); color: var(--mizu-shiro);
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .rf-stamp--primary:hover { background: var(--mizu-asagi); }
}
[data-design="b"] .rf-stamp--ghost { background: transparent; color: var(--mizu-sumi); }
[data-design="b"] .rf-stamp:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--mizu-mizu); }
[data-design="b"] .rf-stamp:active { transform: translateY(1px); }

/* Funnel nav */
[data-design="b"] .b-funnel__nav {
  margin-top: var(--sp-shoji); display: flex; align-items: center; gap: var(--sp-tile);
  flex-wrap: wrap;
}
[data-design="b"] .b-back-btn {
  background: none; border: none; font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--mizu-asagi);
  cursor: pointer; padding: 0; min-height: 44px;
}
[data-design="b"] .b-back-btn[hidden] { display: none; }
[data-design="b"] .b-progress {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em;
  color: var(--mizu-asagi); text-transform: uppercase;
}

/* Done state */
[data-design="b"] .b-done {
  position: relative; padding: var(--sp-ma) clamp(20px, 4vw, 40px);
  background: var(--mizu-cream); border: 1px solid var(--mizu-mist);
  margin-top: 2px; text-align: center;
  opacity: 0; transform: translateY(8px);
  transition: opacity var(--dur-unfurl) var(--motion-unfurl),
              transform var(--dur-unfurl) var(--motion-unfurl);
}
[data-design="b"] .b-done[hidden] { display: none; }
[data-design="b"] .b-done.is-visible { opacity: 1; transform: translateY(0); }
[data-design="b"] .b-done h3 {
  font-family: var(--font-display); font-size: clamp(26px, 3.4vw, 34px);
  color: var(--mizu-sumi); margin: var(--sp-tile) 0 var(--sp-step); font-weight: 400;
}
[data-design="b"] .b-done p { font-size: 15px; color: var(--mizu-sumi); }
[data-design="b"] .b-done a { color: var(--mizu-asagi); }
[data-design="b"] .rf-hanko {
  display: inline-flex; align-items: center; justify-content: center;
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--mizu-akane); color: var(--mizu-shiro);
  font-family: var(--font-display); font-size: 34px;
  transform: scale(0.92) rotate(-6deg); opacity: 0;
  transition: transform 420ms var(--motion-settle), opacity 420ms var(--motion-settle);
}
[data-design="b"] .b-done.is-visible .rf-hanko {
  transform: scale(1) rotate(-6deg); opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  [data-design="b"] .b-choice,
  [data-design="b"] .b-done,
  [data-design="b"] .rf-hanko { transition-duration: 0ms; animation: none !important; }
}
@media (max-width: 560px) {
  [data-design="b"] .b-choices { grid-template-columns: 1fr; }
}

/* ================================================================
   SCROLL PARALLAX — TRIAD-2 (genuine scroll-driven, not fade-in)
   Uses will-change: transform on hero content only
   ================================================================ */
[data-design="b"] .b-hero__content {
  will-change: transform;
}

/* ================================================================
   FOOTER
   ================================================================ */
[data-design="b"] .b-footer {
  background: var(--mizu-aizome);
  padding: var(--sp-tatami) clamp(20px, 5vw, 56px);
}
[data-design="b"] .b-footer__inner { max-width: 1280px; margin: 0 auto; }
[data-design="b"] .b-footer__cols {
  display: flex; gap: var(--sp-ma); flex-wrap: wrap; align-items: flex-start;
  border-top: 1px solid rgba(164,200,220,0.3); padding-top: var(--sp-tatami);
}
[data-design="b"] .b-footer__col { display: flex; flex-direction: column; gap: var(--sp-step); }
[data-design="b"] .b-footer__name {
  font-family: var(--font-display); font-size: 20px; color: var(--mizu-shiro);
  letter-spacing: -0.01em; font-weight: 400;
}
[data-design="b"] .b-footer__phone {
  font-family: var(--font-body); font-size: 15px; letter-spacing: 0.04em;
  color: var(--mizu-mizu); text-decoration: none;
}
[data-design="b"] .b-footer__meta {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em;
  text-transform: uppercase; color: rgba(164,200,220,0.7); margin: 0;
}
@media (hover: hover) and (pointer: fine) {
  [data-design="b"] .b-footer__phone:hover { color: var(--mizu-shiro); }
}
@media (max-width: 560px) {
  [data-design="b"] .b-footer__cols { flex-direction: column; gap: var(--sp-tatami); }
}

/* ── Phase-3.4 visibility floor (forge_assemble override) ── */
[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; }

/* 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; }