/* ─────────────────────────────────────────────────────────────
   Datum × Roofing — Design A
   All selectors scoped to [data-design="a"]
   ~12–16 color tokens; no gradients on surfaces.
   ───────────────────────────────────────────────────────────── */

/* ── 0. DESIGN TOKENS ──────────────────────────────────────── */
[data-design="a"] {
  --design-a-primary:        #9E4221; /* corten oxide — exposes the override hook */

  /* Color */
  --datum-bg:                #ECEAE4;
  --datum-surface:           #F6F4EE;
  --datum-surface-warm:      #E4DFD3;
  --datum-ink:               #18181B;
  --datum-ink-2:             #33343A;
  --datum-muted:             #7A7B82;
  --datum-meta:              #9C9CA1;
  --datum-border:            #D4D0C8;
  --datum-border-strong:     #1F1F22;
  --datum-accent:            #9E4221; /* corten */
  --datum-accent-hover:      #8A381A;
  --datum-accent-active:     #76300F;
  --datum-flag:              #E5B100;
  --datum-success:           #4A6B43;
  --datum-warn:              #B0762B;
  --datum-critical:          #A6311F;
  --datum-accent-on:         #F6F4EE;

  /* Typography */
  --datum-font-display: 'Helvetica Neue', 'Inter Tight', 'Arial', system-ui, sans-serif;
  --datum-font-body:    'Helvetica Neue', 'Inter',       'Arial', system-ui, sans-serif;
  --datum-font-mono:    'JetBrains Mono', 'IBM Plex Mono', ui-monospace, Menlo, monospace;

  /* Spacing */
  --datum-step-1:  4px;
  --datum-step-2:  8px;
  --datum-step-3: 12px;
  --datum-step-4: 20px;
  --datum-step-5: 32px;
  --datum-step-6: 56px;
  --datum-step-7: 96px;
  --datum-step-8: 144px;

  /* Motion */
  --datum-dur-snap:   100ms;
  --datum-dur-set:    240ms;
  --datum-dur-arc:   1800ms;
  --datum-dur-cure: 18000ms;
  --datum-dur-light:26000ms;
  --datum-ease-set:  cubic-bezier(0.22, 0.61, 0.36, 1);
  --datum-ease-arc:  cubic-bezier(0.45, 0, 0.55, 1);
  --datum-ease-snap: cubic-bezier(0.5, 0, 0.7, 0);

  /* Radius */
  --datum-r-0: 0;
  --datum-r-1: 2px;

  /* Elevation */
  --datum-elev-ring:  inset 0 0 0 1px var(--datum-border);
  --datum-elev-press: inset 0 1px 0 0 rgba(0,0,0,0.06);

  /* Base */
  background: var(--datum-bg);
  color: var(--datum-ink);
  font-family: var(--datum-font-body);
  font-size: 17px;
  line-height: 1.55;
  box-sizing: border-box;
}

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

/* ── 1. E1 — ANIMATED MINIMALIST HEADER ────────────────────── */
[data-design="a"] .rf-header {
  position: sticky; top: 0; z-index: 30;
  background: var(--datum-bg);
  border-bottom: 1px solid var(--datum-border);
}
[data-design="a"] .rf-header__bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px clamp(20px, 4vw, 56px);
  position: relative; z-index: 2;
}
[data-design="a"] .rf-logo {
  font-family: var(--datum-font-display);
  font-weight: 600; font-size: 20px; letter-spacing: -0.01em;
  color: var(--datum-ink); text-decoration: none;
}
[data-design="a"] .rf-atmosphere {
  position: absolute; inset: auto 0 0 0; height: 2px;
  overflow: hidden; pointer-events: none;
}
[data-design="a"] .rf-atmosphere__hairline {
  position: absolute; top: 0; left: -40%;
  height: 2px; width: 40%;
  background: linear-gradient(90deg, transparent 0%, var(--datum-accent) 50%, transparent 100%);
  animation: a-light-traverse var(--datum-dur-light) linear infinite;
}
@keyframes a-light-traverse {
  0%   { transform: translateX(0); }
  100% { transform: translateX(350%); }
}
[data-design="a"] .rf-burger {
  width: 44px; height: 44px;
  display: flex; flex-direction: column; justify-content: center; gap: 6px;
  background: transparent; border: 1px solid var(--datum-border);
  border-radius: 0; cursor: pointer; padding: 0 10px;
  transition: border-color var(--datum-dur-set) var(--datum-ease-set);
}
[data-design="a"] .rf-burger__line {
  display: block; height: 2px; background: var(--datum-ink);
  transition: transform var(--datum-dur-set) var(--datum-ease-set),
              opacity   var(--datum-dur-set) var(--datum-ease-set);
}
[data-design="a"] .rf-burger:hover { border-color: var(--datum-ink); }
[data-design="a"] .rf-burger[aria-expanded="true"] .rf-burger__line:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}
[data-design="a"] .rf-burger[aria-expanded="true"] .rf-burger__line:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}
/* Hamburger drawer */
[data-design="a"] .rf-menu {
  position: fixed; inset: 0; background: var(--datum-bg);
  z-index: 40; padding: clamp(72px, 12vh, 120px) clamp(24px, 6vw, 96px);
  transform: translateY(-100%);
  transition: transform var(--datum-dur-set) var(--datum-ease-set);
}
[data-design="a"] .rf-menu:not([hidden]) { transform: translateY(0); }
[data-design="a"] .rf-menu__backdrop {
  position: absolute; inset: 0; z-index: -1;
}
[data-design="a"] .rf-menu__close {
  position: absolute; top: 24px; right: 24px;
  width: 44px; height: 44px;
  background: transparent; border: 1px solid var(--datum-border);
  cursor: pointer; font-size: 18px; color: var(--datum-ink);
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--datum-dur-set);
}
[data-design="a"] .rf-menu__close:hover { border-color: var(--datum-ink); }
[data-design="a"] .rf-menu__inner {
  display: flex; flex-direction: column; gap: 20px; max-width: 720px;
}
[data-design="a"] .rf-menu__link {
  font-family: var(--datum-font-display);
  font-weight: 600; font-size: clamp(32px, 6vw, 56px);
  color: var(--datum-ink); text-decoration: none; letter-spacing: -0.02em;
  padding-block: 8px; border-bottom: 1px solid var(--datum-border);
  transition: color var(--datum-dur-set) var(--datum-ease-set);
}
[data-design="a"] .rf-menu__link:hover { color: var(--datum-accent); }
[data-design="a"] .rf-menu__ctas {
  display: flex; flex-direction: column; gap: 12px; padding-top: 20px;
}
[data-design="a"] .rf-menu__phone {
  font-family: var(--datum-font-mono); font-size: 17px;
  color: var(--datum-ink); text-decoration: none;
  padding: 14px 0; min-height: 44px;
}
[data-design="a"] .rf-menu__phone:hover { color: var(--datum-accent); }
[data-design="a"] .rf-menu__cta-drawer {
  display: inline-flex; align-items: center;
  background: var(--datum-accent); color: var(--datum-accent-on);
  font-family: var(--datum-font-display); font-weight: 600; font-size: 17px;
  padding: 16px 26px; text-decoration: none; min-height: 44px;
  transition: background-color var(--datum-dur-set);
}
[data-design="a"] .rf-menu__cta-drawer:hover { background: var(--datum-accent-hover); }

/* ── 2. E2 — ANIMATED CTA (corten, breath) ─────────────────── */
[data-design="a"] .rf-cta {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 16px 26px;
  background: var(--datum-accent); color: var(--datum-accent-on);
  font-family: var(--datum-font-display);
  font-weight: 600; font-size: 17px; letter-spacing: 0.02em;
  text-decoration: none; border: 1px solid transparent; border-radius: 0;
  position: relative; overflow: hidden; min-height: 44px;
  transition: background-color var(--datum-dur-set) var(--datum-ease-set),
              transform        var(--datum-dur-set) var(--datum-ease-set);
  animation: a-cta-breath 4s var(--datum-ease-arc) infinite;
  will-change: transform, background-color;
}
[data-design="a"] .rf-cta:hover { background: var(--datum-accent-hover); }
[data-design="a"] .rf-cta:focus-visible {
  outline: 2px solid var(--datum-accent); outline-offset: 4px;
}
[data-design="a"] .rf-cta:active {
  background: var(--datum-accent-active);
  transform: translateY(1px);
  box-shadow: var(--datum-elev-press);
  transition-duration: var(--datum-dur-snap);
}
[data-design="a"] .rf-cta__arrow {
  display: inline-flex;
  transition: transform var(--datum-dur-set) var(--datum-ease-set);
}
[data-design="a"] .rf-cta:hover .rf-cta__arrow { transform: translateX(3px); }
@keyframes a-cta-breath {
  0%, 100% { filter: brightness(1);    }
  50%      { filter: brightness(1.07); }
}

/* ── 3. E3 HERO — Roofline-draw animated backdrop ──────────── */
[data-design="a"] .rf-hero {
  position: relative; overflow: hidden;
  min-height: clamp(480px, 72vh, 760px);
  display: flex; align-items: center;
  padding: clamp(80px, 12vw, 160px) clamp(20px, 5vw, 80px) clamp(64px, 8vw, 120px);
  background: var(--datum-bg);
}
[data-design="a"] .rf-hero__backdrop {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  overflow: hidden;
}
[data-design="a"] .rf-hero__ridge {
  position: absolute; bottom: 0; left: 0;
  width: 100%; height: 60%;
}
/* Ridge line draws across: stroke-dasharray drives draw-in */
[data-design="a"] .rf-ridge__line {
  fill: none;
  stroke: var(--datum-border-strong);
  stroke-width: 2.5;
  stroke-dasharray: 4000;
  stroke-dashoffset: 4000;
  animation: a-ridge-draw 2.0s var(--datum-ease-set) forwards,
             a-ridge-pulse 8s ease-in-out 2.2s infinite;
}
@keyframes a-ridge-draw {
  0%   { stroke-dashoffset: 4000; }
  100% { stroke-dashoffset: 0; }
}
@keyframes a-ridge-pulse {
  0%, 100% { stroke: var(--datum-border-strong); }
  50%      { stroke: var(--datum-accent); opacity: 0.7; }
}
/* Roof planes fill in after ridge draws */
[data-design="a"] .rf-roof__plane {
  fill: var(--datum-ink);
  opacity: 0;
  animation: a-plane-in 1.4s var(--datum-ease-set) 1.8s forwards;
}
[data-design="a"] .rf-roof__plane--r {
  animation-delay: 1.95s;
  fill: var(--datum-ink-2);
}
@keyframes a-plane-in {
  0%   { opacity: 0; }
  100% { opacity: 0.32; }
}
/* Standing seam ribs draw in */
[data-design="a"] .rf-seam {
  stroke: var(--datum-border);
  stroke-width: 1;
  stroke-dasharray: 320;
  stroke-dashoffset: 320;
  animation: a-seam-in 0.7s var(--datum-ease-set) calc(2.1s + var(--sd)) forwards,
             a-seam-drift 12s ease-in-out calc(2.8s + var(--sd)) infinite;
}
@keyframes a-seam-in {
  0%   { stroke-dashoffset: 320; opacity: 0; }
  100% { stroke-dashoffset: 0;   opacity: 1; }
}
@keyframes a-seam-drift {
  0%, 100% { opacity: 0.55; }
  50%      { opacity: 0.9; }
}
/* Sustained ambient wash — the perceptible-at-rest motion layer */
[data-design="a"] .rf-hero__wash {
  fill: url(#a-wash-grad);
  opacity: 0.18;
  animation: a-wash-shift 9s ease-in-out 0.1s infinite;
}
@keyframes a-wash-shift {
  0%, 100% { opacity: 0.12; transform: translateX(0);    }
  50%      { opacity: 0.28; transform: translateX(-3%);  }
}
/* Hero content layer above backdrop */
[data-design="a"] .rf-hero__content {
  position: relative; z-index: 1;
  max-width: 740px;
  display: flex; flex-direction: column; gap: var(--datum-step-3);
}
/* All hero text opacity:1 at first paint — never reveal-gated */
[data-design="a"] .rf-hero__eyebrow {
  font-family: var(--datum-font-mono);
  font-size: 12px; letter-spacing: 0.10em; text-transform: uppercase;
  color: var(--datum-accent);
}
[data-design="a"] .rf-hero__headline {
  font-family: var(--datum-font-display);
  font-weight: 600;
  font-size: clamp(36px, 6.5vw, 88px);
  letter-spacing: -0.02em; line-height: 1.08;
  color: var(--datum-surface); /* cream against dark planes */
  margin: 0;
  text-shadow: 0 2px 20px rgba(0,0,0,0.55);
}
[data-design="a"] .rf-hero__subtitle {
  font-size: clamp(15px, 2vw, 19px); line-height: 1.5;
  color: var(--datum-surface-warm);
  max-width: 54ch; margin: 0;
  text-shadow: 0 1px 8px rgba(0,0,0,0.45);
}
[data-design="a"] .rf-hero__proof {
  font-family: var(--datum-font-mono); font-size: 12px;
  color: var(--datum-meta); letter-spacing: 0.06em;
  text-transform: uppercase; margin: 0;
}
[data-design="a"] .rf-hero__ctas {
  display: flex; flex-wrap: wrap; align-items: center; gap: 20px;
  margin-top: var(--datum-step-3);
}
[data-design="a"] .rf-hero__phone-secondary {
  font-family: var(--datum-font-mono); font-size: 15px;
  color: var(--datum-surface-warm); text-decoration: none;
  border-bottom: 1px solid var(--datum-border);
  padding-bottom: 2px; min-height: 44px; display: inline-flex; align-items: center;
  transition: color var(--datum-dur-set);
}
[data-design="a"] .rf-hero__phone-secondary:hover { color: var(--datum-accent-on); }

/* ── 6. E6 — POINTER (between hero and funnel) ──────────────── */
[data-design="a"] .rf-pointer {
  display: flex; align-items: center; gap: 16px;
  padding: 32px clamp(20px, 5vw, 80px) 24px;
  font-family: var(--datum-font-mono);
  font-size: 12px; color: var(--datum-ink-2);
  border-bottom: 1px solid var(--datum-border);
  background: var(--datum-surface);
  /* Pointer MUST be visibly rendered — opacity:1, never hidden */
  opacity: 1;
}
[data-design="a"] .rf-pointer__shed {
  display: flex; align-items: center;
}
[data-design="a"] .rf-pointer__roof {
  width: clamp(80px, 14vw, 160px); height: auto; overflow: visible;
}
[data-design="a"] .rf-pointer__course {
  fill: none; stroke: var(--datum-accent); stroke-width: 2;
  stroke-dasharray: 520; stroke-dashoffset: 520;
  animation: a-course-lay 1.6s var(--datum-ease-set) 0.3s forwards,
             a-course-glow 6s ease-in-out 2s infinite;
}
@keyframes a-course-lay {
  0%   { stroke-dashoffset: 520; }
  100% { stroke-dashoffset: 0; }
}
@keyframes a-course-glow {
  0%, 100% { stroke: var(--datum-accent); opacity: 0.9; }
  50%      { stroke: var(--datum-accent-hover); opacity: 1; }
}
[data-design="a"] .rf-pointer__drip {
  stroke: var(--datum-accent); stroke-width: 1.5;
  stroke-dasharray: 48; stroke-dashoffset: 48;
  animation: a-drip-shed 0.7s ease-in calc(1.8s + var(--sd, 0s)) forwards,
             a-drip-shed-loop 5s ease-in-out calc(2.6s + var(--sd, 0s)) infinite;
}
[data-design="a"] .rf-pointer__drip--1 { --sd: 0.0s; }
[data-design="a"] .rf-pointer__drip--2 { --sd: 0.15s; }
[data-design="a"] .rf-pointer__drip--3 { --sd: 0.3s; }
@keyframes a-drip-shed {
  0%   { stroke-dashoffset: 48; opacity: 0; }
  100% { stroke-dashoffset: 0;  opacity: 0.7; }
}
@keyframes a-drip-shed-loop {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 0.9; }
}
[data-design="a"] .rf-pointer__label {
  font-size: 12px; letter-spacing: 0.10em; text-transform: uppercase;
  color: var(--datum-muted); white-space: nowrap;
}
/* Datum pointer progress bar (E6) */
[data-design="a"] .datum-pointer__counter {
  font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; opacity: 0.75;
}
[data-design="a"] .datum-pointer__counter-now {
  display: inline-block; min-width: 1ch;
  animation: a-pointer-tick 320ms ease-out;
}
[data-design="a"] .datum-pointer__bar {
  position: relative; flex: 1; height: 2px;
  background: currentColor; opacity: 0.15; overflow: hidden;
}
[data-design="a"] .datum-pointer__bar-fill {
  position: absolute; inset: 0;
  width: var(--datum-pointer-progress, 16%);
  background: var(--datum-accent); opacity: 1;
  transition: width 480ms cubic-bezier(0.22, 0.61, 0.36, 1);
}
[data-design="a"] .datum-pointer__chev {
  font-size: 18px; opacity: 0.6;
  animation: a-pointer-chev 4s ease-in-out infinite;
}
@keyframes a-pointer-tick {
  0%   { transform: translateY(-6px); opacity: 0; }
  100% { transform: translateY(0);    opacity: 1; }
}
@keyframes a-pointer-chev {
  0%, 100% { transform: translateX(0);   opacity: 0.45; }
  50%      { transform: translateX(4px); opacity: 0.9; }
}

/* ── 5. E5 — FUNNEL ─────────────────────────────────────────── */
[data-design="a"] .rf-interactive {
  max-width: 760px; margin: var(--datum-step-8) auto;
  padding: 0 clamp(20px, 5vw, 56px);
}
[data-design="a"] .rf-funnel__head { margin-bottom: var(--datum-step-5); }
[data-design="a"] .rf-funnel__eyebrow {
  display: inline-block; font-family: var(--datum-font-mono);
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--datum-accent); margin-bottom: 8px;
}
[data-design="a"] .rf-funnel__title {
  font-family: var(--datum-font-display); font-weight: 600;
  font-size: clamp(28px, 4vw, 48px); letter-spacing: -0.02em;
  margin: 0; color: var(--datum-ink); line-height: 1.15;
}
[data-design="a"] .rf-funnel__steps {
  display: flex; gap: 0; list-style: none; padding: 0; margin: 0 0 var(--datum-step-5);
  border: 1px solid var(--datum-border); background: var(--datum-surface);
}
[data-design="a"] .rf-step-pip {
  flex: 1; display: flex; align-items: center; gap: 8px;
  padding: 12px 12px; border-right: 1px solid var(--datum-border);
  font-family: var(--datum-font-mono); font-size: 12px; color: var(--datum-muted);
  transition: color var(--datum-dur-set), background-color var(--datum-dur-set);
}
[data-design="a"] .rf-step-pip:last-child { border-right: 0; }
[data-design="a"] .rf-step-pip__n { font-weight: 600; }
[data-design="a"] .rf-step-pip.is-active { background: var(--datum-ink); color: var(--datum-bg); }
[data-design="a"] .rf-step-pip.is-done   { color: var(--datum-accent); }
[data-design="a"] .rf-funnel {
  position: relative; border: 1px solid var(--datum-border);
  background: var(--datum-surface); padding: var(--datum-step-5);
}
[data-design="a"] .rf-funnel__step {
  border: 0; padding: 0; margin: 0;
  display: grid; gap: var(--datum-step-4);
  opacity: 1; transform: translateX(0);
  transition: opacity var(--datum-dur-set) var(--datum-ease-set),
              transform var(--datum-dur-set) var(--datum-ease-set);
}
[data-design="a"] .rf-funnel__legend {
  font-family: var(--datum-font-mono); font-size: 12px;
  color: var(--datum-meta); letter-spacing: 0.08em; text-transform: uppercase;
}
[data-design="a"] .rf-slot { display: grid; gap: 6px; }
[data-design="a"] .rf-slot__label {
  font-family: var(--datum-font-mono); font-size: 12px;
  color: var(--datum-meta); letter-spacing: 0.08em; text-transform: uppercase;
}
[data-design="a"] .rf-slot input,
[data-design="a"] .rf-slot select,
[data-design="a"] .rf-slot textarea {
  font-family: var(--datum-font-body); font-size: 17px; color: var(--datum-ink);
  border: 1px solid var(--datum-border); background: var(--datum-bg);
  padding: 12px 14px; border-radius: 0; outline: none; width: 100%;
  transition: border-color var(--datum-dur-snap), box-shadow var(--datum-dur-snap);
}
[data-design="a"] .rf-slot input:focus,
[data-design="a"] .rf-slot select:focus,
[data-design="a"] .rf-slot textarea:focus {
  border-color: var(--datum-accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--datum-accent) 25%, transparent);
}
[data-design="a"] .rf-slot.is-error input,
[data-design="a"] .rf-slot.is-error select,
[data-design="a"] .rf-slot.is-error textarea {
  border-color: var(--datum-critical);
}
[data-design="a"] .rf-chips {
  display: flex; flex-wrap: wrap; gap: 8px;
}
[data-design="a"] .rf-chip {
  position: relative; padding: 12px 16px; min-height: 44px;
  border: 1px solid var(--datum-border); background: var(--datum-bg);
  font-size: 15px; cursor: pointer; display: flex; align-items: center;
  transition: border-color var(--datum-dur-snap),
              background-color var(--datum-dur-snap),
              color var(--datum-dur-snap);
}
[data-design="a"] .rf-chip input {
  position: absolute; opacity: 0; pointer-events: none; width: 0; height: 0;
}
[data-design="a"] .rf-chip:hover { border-color: var(--datum-ink); }
[data-design="a"] .rf-chip:has(input:checked) {
  background: var(--datum-accent); color: var(--datum-accent-on);
  border-color: var(--datum-accent);
}
[data-design="a"] .rf-funnel__nav {
  display: flex; gap: 12px; justify-content: flex-end; margin-top: var(--datum-step-3);
  flex-wrap: wrap;
}
[data-design="a"] .rf-plate {
  font-family: var(--datum-font-display); font-weight: 600; font-size: 15px;
  padding: 14px 22px; min-height: 44px; border-radius: 0;
  border: 1px solid transparent; cursor: pointer; letter-spacing: 0.02em;
  transition: background-color var(--datum-dur-set), color var(--datum-dur-set);
}
[data-design="a"] .rf-plate--primary {
  background: var(--datum-accent); color: var(--datum-accent-on);
}
[data-design="a"] .rf-plate--primary:hover { background: var(--datum-accent-hover); }
[data-design="a"] .rf-plate--primary:active {
  background: var(--datum-accent-active); transform: translateY(1px);
}
[data-design="a"] .rf-plate--quiet {
  background: transparent; color: var(--datum-ink); border-color: var(--datum-border);
}
[data-design="a"] .rf-plate--quiet:hover { border-color: var(--datum-ink); }
[data-design="a"] .rf-funnel__receipt {
  display: grid; gap: var(--datum-step-3); padding: var(--datum-step-5) 0;
  animation: a-step-in var(--datum-dur-set) var(--datum-ease-set);
}
[data-design="a"] .rf-funnel__stamp {
  display: inline-block; padding: 6px 10px;
  border: 2px solid var(--datum-accent); color: var(--datum-accent);
  font-family: var(--datum-font-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  transform: rotate(-2deg); justify-self: start;
}
[data-design="a"] .rf-funnel__thanks {
  font-family: var(--datum-font-display); font-weight: 600;
  font-size: clamp(22px, 3vw, 30px); letter-spacing: -0.01em; margin: 0;
  color: var(--datum-ink);
}
[data-design="a"] .rf-funnel__id {
  font-family: var(--datum-font-mono); color: var(--datum-muted); margin: 0; font-size: 14px;
}
[data-design="a"] .rf-funnel__id a {
  color: var(--datum-accent); text-decoration: none;
}
[data-design="a"] .rf-funnel__id a:hover { text-decoration: underline; }
@keyframes a-step-in {
  from { opacity: 0; transform: translateX(24px); }
  to   { opacity: 1; transform: translateX(0); }
}
[data-design="a"] .rf-funnel__trust {
  display: flex; flex-wrap: wrap; gap: 16px 32px;
  margin-top: var(--datum-step-5); padding-top: var(--datum-step-4);
  border-top: 1px solid var(--datum-border);
  font-family: var(--datum-font-mono); font-size: 12px;
  color: var(--datum-muted); letter-spacing: 0.06em; text-transform: uppercase;
}
[data-design="a"] .rf-funnel__urgency-note {
  font-family: var(--datum-font-mono); font-size: 13px; color: var(--datum-warn);
  min-height: 0;
}

/* ── E3 AMBIENT-A — Datum line / services ───────────────────── */
[data-design="a"] .rf-ambient-a {
  padding: var(--datum-step-7) clamp(20px, 5vw, 56px) var(--datum-step-5);
  max-width: 1280px; margin: 0 auto;
}
[data-design="a"] .rf-ambient-a__title {
  font-family: var(--datum-font-display); font-weight: 600;
  font-size: clamp(32px, 4vw, 48px); letter-spacing: -0.02em;
  margin: 0 0 12px; color: var(--datum-ink);
}
[data-design="a"] .rf-ambient-a__sub {
  max-width: 64ch; margin: 0 0 var(--datum-step-5); color: var(--datum-ink-2);
  font-size: 17px; line-height: 1.55;
}
[data-design="a"] .rf-datum {
  position: relative; height: 64px; width: 100%;
  border-top: 1px solid var(--datum-border); padding-top: 28px;
}
[data-design="a"] .rf-datum__line {
  position: absolute; left: 0; top: 28px; height: 2px; width: 0;
  background: var(--datum-border-strong);
  transition: width 1.6s var(--datum-ease-set);
}
[data-design="a"] .rf-ambient-a.is-in .rf-datum__line { width: 100%; }
[data-design="a"] .rf-datum__tick {
  position: absolute; top: 28px; left: calc(var(--i) * 12.5%);
  width: 2px; height: 10px; background: var(--datum-ink);
  opacity: 0; transform: translateY(-6px);
  transition: opacity 0.5s var(--datum-ease-set) calc(0.2s + var(--i) * 0.12s),
              transform 0.5s var(--datum-ease-set) calc(0.2s + var(--i) * 0.12s);
  animation: a-tick-pulse 11s ease-in-out infinite;
  animation-delay: calc(var(--i) * 1.3s);
}
[data-design="a"] .rf-ambient-a.is-in .rf-datum__tick {
  opacity: 1; transform: translateY(0);
}
[data-design="a"] .rf-datum__tick em {
  position: absolute; top: 14px; left: -20px;
  font-family: var(--datum-font-mono); font-style: normal;
  font-size: 10px; color: var(--datum-meta); letter-spacing: 0.02em;
  white-space: nowrap;
}
@keyframes a-tick-pulse {
  0%, 92%, 100% { background: var(--datum-ink); }
  96%           { background: var(--datum-accent); }
}
/* Service index */
[data-design="a"] .rf-service-index {
  list-style: none; padding: 0; margin: var(--datum-step-6) 0 0;
  border-top: 1px solid var(--datum-border);
}
[data-design="a"] .rf-service-row {
  display: grid;
  grid-template-columns: 3ch 1fr 1fr;
  gap: 0 32px; align-items: start;
  padding: var(--datum-step-4) 0;
  border-bottom: 1px solid var(--datum-border);
}
[data-design="a"] .rf-service-row__n {
  font-family: var(--datum-font-mono); font-size: 12px;
  color: var(--datum-muted); padding-top: 4px;
}
[data-design="a"] .rf-service-row__name {
  font-family: var(--datum-font-display); font-weight: 600;
  font-size: clamp(18px, 2.5vw, 24px); color: var(--datum-ink);
  letter-spacing: -0.01em;
}
[data-design="a"] .rf-service-row__scope {
  font-size: 15px; color: var(--datum-ink-2); line-height: 1.5;
}

/* ── ABOUT ──────────────────────────────────────────────────── */
[data-design="a"] .rf-about {
  padding: var(--datum-step-7) clamp(20px, 5vw, 56px);
  background: var(--datum-surface); border-top: 1px solid var(--datum-border);
}
[data-design="a"] .rf-about__inner {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr min(360px, 38%); gap: var(--datum-step-6);
  align-items: start;
}
[data-design="a"] .rf-eyebrow {
  display: block; font-family: var(--datum-font-mono); font-size: 12px;
  letter-spacing: 0.10em; text-transform: uppercase;
  color: var(--datum-accent); margin-bottom: 12px;
}
[data-design="a"] .rf-about__title {
  font-family: var(--datum-font-display); font-weight: 600;
  font-size: clamp(24px, 3.5vw, 40px); letter-spacing: -0.02em; line-height: 1.2;
  color: var(--datum-ink); margin: 0 0 var(--datum-step-4);
}
[data-design="a"] .rf-about__text p {
  color: var(--datum-ink-2); line-height: 1.6; max-width: 66ch;
  margin: 0 0 var(--datum-step-3);
}
[data-design="a"] .rf-about__cta {
  display: inline-flex; align-items: center;
  padding: 14px 22px; min-height: 44px;
  background: transparent; color: var(--datum-ink);
  border: 1px solid var(--datum-border);
  font-family: var(--datum-font-display); font-weight: 600; font-size: 15px;
  text-decoration: none; margin-top: var(--datum-step-3);
  transition: border-color var(--datum-dur-set), color var(--datum-dur-set);
}
[data-design="a"] .rf-about__cta:hover {
  border-color: var(--datum-accent); color: var(--datum-accent);
}
[data-design="a"] .rf-about__stat-col {
  display: flex; flex-direction: column; gap: var(--datum-step-4);
}
[data-design="a"] .rf-stat {
  display: grid; gap: 2px;
  padding: var(--datum-step-4); border: 1px solid var(--datum-border);
  background: var(--datum-bg);
}
[data-design="a"] .rf-stat__n {
  font-family: var(--datum-font-display); font-weight: 600;
  font-size: clamp(40px, 5vw, 64px); letter-spacing: -0.02em; color: var(--datum-ink);
  line-height: 1;
}
[data-design="a"] .rf-stat__unit {
  font-family: var(--datum-font-mono); font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--datum-accent);
}
[data-design="a"] .rf-stat__label {
  font-size: 13px; color: var(--datum-muted); margin-top: 6px;
}

/* ── E4 AMBIENT-B — Pour / process ─────────────────────────── */
[data-design="a"] .rf-ambient-b {
  padding: var(--datum-step-7) clamp(20px, 5vw, 56px);
  max-width: 1280px; margin: 0 auto;
}
[data-design="a"] .rf-ambient-b__title {
  font-family: var(--datum-font-display); font-weight: 600;
  font-size: clamp(32px, 4vw, 48px); letter-spacing: -0.02em;
  margin: 0 0 var(--datum-step-5); color: var(--datum-ink);
}
[data-design="a"] .rf-pour {
  display: grid; grid-template-columns: minmax(160px, 240px) 1fr;
  gap: var(--datum-step-5); align-items: end;
  border: 1px solid var(--datum-border); background: var(--datum-surface);
  padding: var(--datum-step-5);
}
[data-design="a"] .rf-pour__well {
  position: relative; aspect-ratio: 1 / 1;
  background: var(--datum-surface-warm); border: 1px solid var(--datum-border); overflow: hidden;
}
[data-design="a"] .rf-pour__fill {
  position: absolute; inset: auto 0 0 0; height: 0%;
  background: var(--datum-ink-2);
  animation: a-cure-fill var(--datum-dur-cure) linear infinite;
}
[data-design="a"] .rf-pour__waterline {
  position: absolute; left: 0; right: 0; height: 2px;
  background: var(--datum-accent); bottom: 0;
  animation: a-cure-line var(--datum-dur-cure) linear infinite;
}
@keyframes a-cure-fill {
  0%   { height: 0%;  background: #7A7975; }
  60%  { height: 88%; background: #5C5B58; }
  90%  { height: 92%; background: var(--datum-bg); }
  100% { height: 92%; background: var(--datum-bg); }
}
@keyframes a-cure-line {
  0%   { bottom: 0%;  opacity: 1; }
  60%  { bottom: 88%; opacity: 1; }
  90%  { bottom: 92%; opacity: 0; }
  100% { bottom: 0%;  opacity: 0; }
}
[data-design="a"] .rf-pour__meta {
  display: flex; flex-direction: column; gap: 4px;
}
[data-design="a"] .rf-pour__label {
  font-family: var(--datum-font-mono); font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--datum-meta);
}
[data-design="a"] .rf-pour__value {
  font-family: var(--datum-font-display); font-weight: 600;
  font-size: clamp(44px, 7vw, 80px); letter-spacing: -0.02em;
  color: var(--datum-ink); font-variant-numeric: tabular-nums; line-height: 1;
}
[data-design="a"] .rf-pour__unit {
  font-family: var(--datum-font-mono); font-size: 13px; color: var(--datum-muted);
}
[data-design="a"] .rf-pour__sub {
  grid-column: 1 / -1; margin: 0; color: var(--datum-ink-2);
  font-size: 16px; line-height: 1.55; max-width: 66ch;
}
/* Process track */
[data-design="a"] .rf-process-track {
  list-style: none; padding: 0; margin: var(--datum-step-6) 0 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--datum-step-4); border-top: 1px solid var(--datum-border);
  padding-top: var(--datum-step-5);
}
[data-design="a"] .rf-process-phase {
  display: grid; gap: 8px;
}
[data-design="a"] .rf-process-phase__n {
  font-family: var(--datum-font-mono); font-size: 11px;
  color: var(--datum-accent); letter-spacing: 0.08em;
}
[data-design="a"] .rf-process-phase__name {
  font-family: var(--datum-font-display); font-weight: 600;
  font-size: 18px; color: var(--datum-ink);
}
[data-design="a"] .rf-process-phase p {
  font-size: 14px; color: var(--datum-ink-2); line-height: 1.5; margin: 0;
}
[data-design="a"] .rf-ambient-b.is-paused .rf-pour__fill,
[data-design="a"] .rf-ambient-b.is-paused .rf-pour__waterline {
  animation-play-state: paused;
}

/* ── REPEAT CTA ─────────────────────────────────────────────── */
[data-design="a"] .rf-repeat-cta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 24px;
  padding: var(--datum-step-7) clamp(20px, 5vw, 56px);
  border-top: 2px solid var(--datum-border-strong);
  border-bottom: 1px solid var(--datum-border);
  background: var(--datum-surface);
}
[data-design="a"] .rf-repeat-cta__lead {
  font-family: var(--datum-font-display); font-weight: 600;
  font-size: clamp(20px, 2.5vw, 28px); color: var(--datum-ink);
  letter-spacing: -0.01em; margin: 0; flex: 1; min-width: 200px;
}

/* ── FOOTER ─────────────────────────────────────────────────── */
[data-design="a"] .rf-footer {
  background: var(--datum-ink); color: var(--datum-bg);
  padding: var(--datum-step-6) clamp(20px, 5vw, 56px);
  border-top: 2px solid var(--datum-border-strong);
}
[data-design="a"] .rf-footer__inner {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--datum-step-5);
}
[data-design="a"] .rf-footer__name {
  display: block; font-family: var(--datum-font-display);
  font-weight: 600; font-size: 20px; letter-spacing: -0.01em;
  color: var(--datum-bg); margin-bottom: 8px;
}
[data-design="a"] .rf-footer__loc {
  display: block; font-family: var(--datum-font-mono);
  font-size: 12px; color: var(--datum-muted); letter-spacing: 0.06em; text-transform: uppercase;
}
[data-design="a"] .rf-footer__phone {
  display: block; font-family: var(--datum-font-mono);
  font-size: 18px; color: var(--datum-bg); text-decoration: none;
  margin-bottom: 8px; min-height: 44px; line-height: 44px;
}
[data-design="a"] .rf-footer__phone:hover { color: var(--datum-accent); }
[data-design="a"] .rf-footer__note {
  display: block; font-size: 13px; color: var(--datum-muted);
}
[data-design="a"] .rf-footer__meta {
  display: flex; flex-direction: column; gap: 8px;
}
[data-design="a"] .rf-footer__meta span {
  font-family: var(--datum-font-mono); font-size: 12px;
  color: var(--datum-muted); letter-spacing: 0.04em;
}
[data-design="a"] .rf-footer__copy {
  color: var(--datum-meta) !important;
}

/* ── REDUCED MOTION FALLBACKS ───────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  [data-design="a"] .rf-atmosphere__hairline { animation: none; opacity: 0.4; transform: translateX(140%); }
  [data-design="a"] .rf-menu { transition: none; }
  [data-design="a"] .rf-cta { animation: none; transition: none; }
  [data-design="a"] .rf-ridge__line { animation: none; stroke-dashoffset: 0; }
  [data-design="a"] .rf-roof__plane { animation: none; opacity: 0.28; }
  [data-design="a"] .rf-seam { animation: none; stroke-dashoffset: 0; opacity: 0.7; }
  [data-design="a"] .rf-hero__wash { animation: none; opacity: 0.18; }
  [data-design="a"] .rf-pointer__course { animation: none; stroke-dashoffset: 0; }
  [data-design="a"] .rf-pointer__drip { animation: none; stroke-dashoffset: 0; opacity: 0.6; }
  [data-design="a"] .datum-pointer__chev { animation: none; }
  [data-design="a"] .datum-pointer__bar-fill { transition: none; }
  [data-design="a"] .rf-datum__line { transition: none; width: 100%; }
  [data-design="a"] .rf-datum__tick { transition: none; opacity: 1; transform: none; animation: none; }
  [data-design="a"] .rf-pour__fill { animation: none; height: 88%; background: var(--datum-ink-2); }
  [data-design="a"] .rf-pour__waterline { animation: none; opacity: 0; }
  [data-design="a"] .rf-funnel__step { transition: none; }
  [data-design="a"] .rf-funnel__receipt { animation: none; }
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  [data-design="a"] .rf-about__inner {
    grid-template-columns: 1fr;
  }
  [data-design="a"] .rf-about__stat-col {
    flex-direction: row; flex-wrap: wrap;
  }
  [data-design="a"] .rf-stat { flex: 1; min-width: 140px; }
}
@media (max-width: 640px) {
  [data-design="a"] .rf-logo { font-size: 15px; }
  [data-design="a"] .rf-header__bar { padding: 16px 20px; }
  [data-design="a"] .rf-service-row {
    grid-template-columns: 3ch 1fr; gap: 8px;
  }
  [data-design="a"] .rf-service-row__scope { grid-column: 2; }
  [data-design="a"] .rf-pour { grid-template-columns: 1fr; }
  [data-design="a"] .rf-pour__well { aspect-ratio: 16 / 9; }
  [data-design="a"] .rf-funnel__steps { font-size: 10px; }
  [data-design="a"] .rf-step-pip { padding: 8px 8px; gap: 4px; }
  [data-design="a"] .rf-pointer {
    flex-wrap: wrap; gap: 12px;
  }
  [data-design="a"] .rf-pointer__label { width: 100%; }
  [data-design="a"] .datum-pointer__bar { min-width: 60px; }
}

/* ── MOBILE OVERFLOW GUARDS (mandatory per contract) ────────── */
[data-design="a"].dq-design,
[data-design="a"] .dq-design { max-width: 100%; overflow-x: clip; }
[data-design="a"] * { min-width: 0; }
[data-design="a"] img,
[data-design="a"] 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; }