:root {
  color-scheme: light;
  --ink: #0b1210;
  --ink-2: #141d1a;
  --ink-3: #202b27;
  --paper: #f0f2ed;
  --paper-2: #e4e8e1;
  --white: #ffffff;
  --line: #c8cec7;
  --line-dark: rgba(255,255,255,.16);
  --muted: #5d6962;
  --muted-light: rgba(255,255,255,.62);
  --acid: #d8f347;
  --acid-deep: #bed627;
  --blue: #4d75ff;
  --teal: #2d7465;
  --danger: #a43f35;
  --radius: 6px;
  --container: 1240px;
  --header-h: 70px;
  --notice-h: 32px;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--notice-h) + 24px);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.52;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

body.menu-open,
body.dialog-open { overflow: hidden; }

body.dialog-open::before {
  content: "";
  position: fixed;
  z-index: 499;
  inset: 0;
  background: rgba(4,8,6,.78);
}

button,
input,
textarea { font: inherit; letter-spacing: 0; }

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }

h1, h2, h3 {
  line-height: .98;
  font-weight: 760;
  letter-spacing: 0;
}

h2 {
  max-width: 17ch;
  margin-bottom: 0;
  font-size: clamp(2.35rem, 5vw, 5.4rem);
}

h3 { font-size: 1.45rem; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  color: var(--ink);
  background: var(--acid);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.demo-notice {
  position: fixed;
  z-index: 120;
  inset: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  height: var(--notice-h);
  padding: 0 20px;
  gap: 14px;
  color: rgba(255,255,255,.72);
  background: #1c2824;
  border-bottom: 1px solid rgba(255,255,255,.1);
  font-size: .72rem;
}

.demo-notice span {
  color: var(--acid);
  font-weight: 850;
  text-transform: uppercase;
}

.demo-notice p { margin: 0; }
.demo-notice a { color: var(--white); text-decoration: underline; text-underline-offset: 3px; }

.site-header {
  position: fixed;
  z-index: 110;
  inset: var(--notice-h) 0 auto;
  height: var(--header-h);
  color: var(--white);
  background: rgba(11,18,16,.92);
  border-bottom: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(14px);
}

.header-inner,
.section-inner,
.hero-inner,
.hero-bottom {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 38px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 11px;
  font-size: 1.02rem;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  align-items: end;
  grid-template-columns: repeat(3, 5px);
  width: 23px;
  height: 25px;
  gap: 3px;
}

.brand-mark i { display: block; width: 5px; background: var(--acid); }
.brand-mark i:nth-child(1) { height: 12px; }
.brand-mark i:nth-child(2) { height: 25px; }
.brand-mark i:nth-child(3) { height: 18px; }

.site-nav { display: flex; align-items: center; margin-left: auto; gap: 28px; }
.site-nav a { color: rgba(255,255,255,.72); font-size: .82rem; font-weight: 680; }
.site-nav a:hover,
.site-nav a:focus-visible { color: var(--acid); }

.header-contact {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 16px;
  gap: 14px;
  color: var(--ink);
  background: var(--acid);
  border: 1px solid var(--acid);
  border-radius: 3px;
  font-size: .8rem;
  font-weight: 820;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 0;
}

.menu-toggle > span:not(.sr-only) { display: block; width: 22px; height: 2px; margin: 5px auto; background: var(--white); }

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: min(920px, 96svh);
  padding: calc(var(--header-h) + var(--notice-h) + 58px) 0 30px;
  color: var(--white);
  background: var(--ink);
  overflow: hidden;
}

.hero-media,
.hero-shade,
.hero-grid { position: absolute; inset: 0; }

.hero-media {
  background-image: url("assets/hero-hvac.png");
  background-size: cover;
  background-position: center;
  transform: scale(1.015);
}

.hero-shade { background: rgba(6,12,9,.66); }

.hero-grid {
  opacity: .18;
  background-size: 56px 56px;
  background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px);
  mask-image: linear-gradient(to right, #000, transparent 74%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  align-items: end;
  flex: 1;
  gap: 28px;
}

.hero-copy-block { align-self: center; max-width: 860px; }

.eyebrow {
  display: flex;
  align-items: center;
  margin-bottom: 24px;
  gap: 14px;
  color: var(--muted-light);
  font-size: .74rem;
  font-weight: 780;
  text-transform: uppercase;
}

.eyebrow span { padding: 7px 9px; color: var(--ink); background: var(--acid); border-radius: 2px; }
.eyebrow b { color: rgba(255,255,255,.78); }

.hero h1 {
  max-width: 900px;
  margin-bottom: 30px;
  font-size: clamp(3.25rem, 6.2vw, 5.8rem);
  line-height: .9;
  text-wrap: balance;
}

.hero-copy { max-width: 780px; margin-bottom: 34px; color: rgba(255,255,255,.76); font-size: clamp(1.02rem, 1.55vw, 1.32rem); }

.hero-actions { display: flex; align-items: flex-start; gap: 14px; }
.action-unit { display: grid; gap: 8px; }
.action-unit small { padding-left: 2px; color: rgba(255,255,255,.5); font-size: .7rem; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  gap: 18px;
  border: 1px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  font-size: .85rem;
  font-weight: 820;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover,
.button:focus-visible { transform: translateY(-2px); }
.button-primary { color: var(--ink); background: var(--acid); border-color: var(--acid); }
.button-primary:hover,
.button-primary:focus-visible { background: var(--acid-deep); border-color: var(--acid-deep); }
.button-ghost { color: var(--white); background: rgba(11,18,16,.54); border-color: rgba(255,255,255,.34); backdrop-filter: blur(8px); }
.button-ghost:hover,
.button-ghost:focus-visible { border-color: var(--white); }
.button-secondary { color: var(--ink); background: transparent; border-color: var(--line); }

.hero-rail {
  align-self: end;
  background: rgba(11,18,16,.74);
  border: 1px solid rgba(255,255,255,.18);
  backdrop-filter: blur(12px);
}

.rail-title { display: flex; justify-content: space-between; padding: 14px 16px; color: rgba(255,255,255,.58); border-bottom: 1px solid rgba(255,255,255,.15); font-size: .68rem; text-transform: uppercase; }
.rail-title b { color: var(--acid); }
.hero-rail ol { margin: 0; padding: 0; list-style: none; }
.hero-rail li { display: grid; grid-template-columns: 34px 1fr; padding: 16px; gap: 12px; border-bottom: 1px solid rgba(255,255,255,.12); }
.hero-rail li:last-child { border-bottom: 0; }
.hero-rail li > span { color: var(--acid); font-size: .68rem; font-weight: 850; }
.hero-rail li div { display: grid; gap: 3px; }
.hero-rail li b { font-size: .84rem; }
.hero-rail li small { color: rgba(255,255,255,.48); font-size: .7rem; }

.hero-bottom {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin-top: 46px;
  gap: 28px;
}

.hero-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 205px)); gap: 0; border-top: 1px solid rgba(255,255,255,.25); }
.hero-facts > div { display: grid; grid-template-columns: 52px 1fr; align-items: start; padding: 18px 22px 0 0; gap: 10px; }
.hero-facts strong { color: var(--acid); font-size: 1.9rem; line-height: 1; }
.hero-facts span { color: rgba(255,255,255,.56); font-size: .7rem; }
.scroll-hint { color: rgba(255,255,255,.62); font-size: .72rem; }
.scroll-hint span { margin-left: 10px; color: var(--acid); }

.scope-band { padding: 17px 0; color: rgba(255,255,255,.7); background: var(--ink-3); overflow: hidden; }
.scope-track { display: flex; align-items: center; justify-content: center; min-width: max-content; gap: 20px; font-size: .72rem; font-weight: 750; text-transform: uppercase; }
.scope-track i { width: 4px; height: 4px; background: var(--acid); border-radius: 50%; }

.section { padding: 126px 0; }
.section-kicker { margin-bottom: 18px; color: var(--teal); font-size: .72rem; font-weight: 850; text-transform: uppercase; }
.section-kicker::before { content: ""; display: inline-block; width: 22px; height: 2px; margin: 0 9px 3px 0; background: currentColor; }
.split-heading,
.process-head,
.scenario-head,
.calculator-head { display: grid; grid-template-columns: minmax(0, 1.22fr) minmax(320px, .78fr); align-items: end; gap: 86px; }
.split-heading > p,
.process-head > p,
.scenario-head > p,
.calculator-head > p { margin-bottom: 7px; color: var(--muted); }

.services { background: var(--paper); }
.service-stages { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 70px; border: 1px solid var(--line); }
.stage-card { position: relative; display: flex; flex-direction: column; min-height: 570px; padding: 34px; background: var(--white); border-right: 1px solid var(--line); }
.stage-card:last-child { border-right: 0; }
.stage-card-primary { color: var(--white); background: var(--ink-2); }
.stage-card::after { content: ""; position: absolute; inset: auto 34px 0; height: 4px; background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform 200ms ease; }
.stage-card:hover::after { transform: scaleX(1); }
.stage-card-primary::after { background: var(--acid); }
.card-index { position: absolute; top: 30px; right: 30px; color: var(--teal); font-size: 2rem; font-weight: 800; }
.stage-card-primary .card-index { color: var(--acid); }
.card-label { margin-bottom: 70px; color: var(--muted); font-size: .68rem; font-weight: 850; text-transform: uppercase; }
.stage-card-primary .card-label { color: rgba(255,255,255,.5); }
.stage-card h3 { max-width: 12ch; margin-bottom: 20px; font-size: clamp(1.65rem, 2.4vw, 2.6rem); }
.stage-card > p:not(.card-label) { color: var(--muted); }
.stage-card-primary > p:not(.card-label) { color: rgba(255,255,255,.62); }
.stage-card ul { margin: 24px 0; padding: 20px 0 0; border-top: 1px solid var(--line); list-style: none; }
.stage-card-primary ul { border-color: rgba(255,255,255,.15); }
.stage-card li { position: relative; padding: 6px 0 6px 17px; color: var(--muted); font-size: .84rem; }
.stage-card-primary li { color: rgba(255,255,255,.68); }
.stage-card li::before { content: "+"; position: absolute; left: 0; color: var(--teal); font-weight: 800; }
.stage-card-primary li::before { color: var(--acid); }
.card-result { display: grid; margin-top: auto; padding-top: 22px; gap: 5px; border-top: 1px solid var(--line); }
.stage-card-primary .card-result { border-color: rgba(255,255,255,.15); }
.card-result span { color: var(--muted); font-size: .65rem; text-transform: uppercase; }
.stage-card-primary .card-result span { color: rgba(255,255,255,.44); }
.card-result b { font-size: .92rem; }
.stage-card > small { margin-top: 22px; color: var(--muted); font-size: .67rem; }
.stage-card-primary > small { color: rgba(255,255,255,.42); }

.system-matrix { display: grid; grid-template-columns: 1.1fr repeat(4, 1fr); margin-top: 18px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.system-matrix > * { min-height: 196px; padding: 28px 22px; border-right: 1px solid var(--line); }
.system-matrix > *:last-child { border-right: 0; }
.matrix-intro { display: flex; flex-direction: column; justify-content: space-between; color: var(--muted); font-size: .68rem; text-transform: uppercase; }
.matrix-intro b { color: var(--teal); font-size: 2rem; }
.system-matrix article > span { color: var(--teal); font-size: .68rem; font-weight: 850; }
.system-matrix h3 { margin: 40px 0 12px; font-size: 1.12rem; }
.system-matrix p { margin: 0; color: var(--muted); font-size: .76rem; }

.dark-section { color: var(--white); background: var(--ink); }
.dark-section .section-kicker { color: var(--acid); }
.evidence { position: relative; overflow: hidden; }
.evidence::before { content: ""; position: absolute; inset: 0; opacity: .13; background-size: 64px 64px; background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px); }
.evidence-layout { position: relative; display: grid; grid-template-columns: .78fr 1.22fr; align-items: center; gap: 78px; }
.evidence-copy h2 { font-size: clamp(2.4rem, 4.6vw, 4.8rem); }
.evidence-copy > p:not(.section-kicker) { margin: 30px 0; color: var(--muted-light); }
.text-link { display: inline-flex; align-items: center; gap: 20px; padding-bottom: 4px; border-bottom: 1px solid currentColor; font-size: .82rem; font-weight: 750; }
.text-link.light { color: var(--white); }
.text-link span { color: var(--acid); }

.evidence-board { background: #e7ebe7; border: 1px solid rgba(255,255,255,.2); box-shadow: 0 30px 80px rgba(0,0,0,.25); }
.board-head { display: grid; grid-template-columns: 120px 1fr auto; align-items: center; padding: 14px 18px; gap: 18px; color: var(--ink); border-bottom: 1px solid var(--line); font-size: .68rem; }
.board-head span { color: var(--teal); font-weight: 850; }
.board-head small { color: var(--muted); }
.scheme-canvas { position: relative; height: 440px; color: var(--ink); background-color: #f5f6f3; background-size: 24px 24px; background-image: linear-gradient(#dfe4de 1px, transparent 1px), linear-gradient(90deg, #dfe4de 1px, transparent 1px); overflow: hidden; }
.scheme-zone { position: absolute; display: grid; align-content: end; padding: 16px; background: rgba(255,255,255,.78); border: 1px solid #9daaa3; box-shadow: inset 0 0 0 5px rgba(255,255,255,.7); }
.scheme-zone span { color: var(--teal); font-size: .68rem; font-weight: 850; }
.scheme-zone b { font-size: .82rem; }
.scheme-zone small { color: var(--muted); font-size: .68rem; }
.zone-a { inset: 50px 42% 74px 42px; }
.zone-b { inset: 50px 42px 220px 61%; }
.zone-c { inset: 242px 42px 74px 61%; }
.scheme-line { position: absolute; z-index: 2; height: 4px; background: var(--blue); transform-origin: left; }
.line-a { top: 144px; left: 14%; width: 60%; transform: rotate(8deg); }
.line-b { top: 278px; left: 24%; width: 50%; background: var(--teal); transform: rotate(-4deg); }
.line-c { top: 214px; left: 50%; width: 31%; background: var(--acid-deep); transform: rotate(90deg); }
.scheme-node { position: absolute; z-index: 3; display: grid; place-items: center; width: 42px; height: 42px; color: var(--white); background: var(--ink); border: 4px solid #f5f6f3; border-radius: 50%; font-size: .65rem; font-weight: 850; }
.node-a { top: 122px; left: 20%; }
.node-b { top: 250px; left: 56%; }
.node-c { top: 190px; right: 17%; background: var(--blue); }
.board-legend { display: flex; align-items: center; padding: 13px 18px; gap: 18px; color: var(--ink); border-top: 1px solid var(--line); font-size: .66rem; }
.board-legend span { display: flex; align-items: center; gap: 6px; }
.board-legend i { width: 18px; height: 3px; background: var(--blue); }
.board-legend .legend-extract { background: var(--teal); }
.board-legend .legend-cooling { background: var(--acid-deep); }
.board-legend small { margin-left: auto; color: var(--muted); }

.proof-grid { position: relative; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 78px; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.proof-grid article { min-height: 230px; padding: 28px 24px; border-right: 1px solid var(--line-dark); }
.proof-grid article:last-child { border-right: 0; }
.proof-grid span { color: var(--acid); font-size: .7rem; font-weight: 850; }
.proof-grid h3 { margin: 48px 0 14px; font-size: 1.12rem; }
.proof-grid p { margin: 0; color: var(--muted-light); font-size: .78rem; }

.scenario { background: var(--white); }
.scenario h2 em { color: var(--teal); font-style: normal; }
.scenario-grid { display: grid; grid-template-columns: 1.1fr .9fr; margin-top: 68px; background: var(--paper); border: 1px solid var(--line); }
.scenario-media { position: relative; min-height: 650px; overflow: hidden; }
.scenario-media img { width: 100%; height: 100%; object-fit: cover; }
.scenario-media::after { content: ""; position: absolute; inset: 0; background: rgba(7,12,10,.18); }
.scenario-media > span { position: absolute; z-index: 2; top: 18px; left: 18px; padding: 8px 10px; color: var(--white); background: rgba(11,18,16,.86); border-radius: 2px; font-size: .68rem; font-weight: 850; text-transform: uppercase; }
.media-specs { position: absolute; z-index: 2; right: 18px; bottom: 18px; left: 18px; display: grid; grid-template-columns: 52px 1fr 52px 1fr; align-items: center; padding: 18px; gap: 10px; color: var(--white); background: rgba(11,18,16,.86); backdrop-filter: blur(8px); }
.media-specs b { color: var(--acid); font-size: 1.7rem; }
.media-specs small { color: rgba(255,255,255,.6); }
.scenario-details { display: flex; flex-direction: column; min-width: 0; padding: 34px; }
.scenario-tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; }
.scenario-tabs button { min-height: 44px; color: var(--muted); background: transparent; border: 1px solid var(--line); border-radius: 2px; cursor: pointer; font-size: .78rem; font-weight: 750; }
.scenario-tabs button.is-active { color: var(--white); background: var(--ink); border-color: var(--ink); }
.scenario-panel { display: none; padding-top: 70px; }
.scenario-panel.is-active { display: block; }
.panel-kicker { color: var(--teal); font-size: .68rem; font-weight: 850; text-transform: uppercase; }
.scenario-panel h3 { max-width: 14ch; margin: 18px 0 36px; font-size: clamp(2rem, 3.1vw, 3.4rem); }
.scenario-panel ul { margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.scenario-panel li { display: grid; grid-template-columns: 120px 1fr; padding: 18px 0; gap: 16px; border-bottom: 1px solid var(--line); }
.scenario-panel li span { color: var(--muted); font-size: .72rem; }
.scenario-panel li b { font-size: .83rem; }
.scenario-panel > small { display: block; margin-top: 28px; color: var(--muted); }

.process { color: var(--white); background: var(--ink-2); }
.process .section-kicker { color: var(--acid); }
.process-head > p { color: var(--muted-light); }
.process-track { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 68px; padding: 0; border-top: 1px solid var(--line-dark); border-left: 1px solid var(--line-dark); list-style: none; }
.process-track li { position: relative; min-height: 230px; padding: 28px; border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.process-track li > span { color: var(--acid); font-size: .68rem; font-weight: 850; }
.process-track h3 { margin: 46px 0 12px; }
.process-track p { color: var(--muted-light); }
.process-track small { position: absolute; right: 28px; bottom: 24px; left: 28px; padding-top: 12px; color: rgba(255,255,255,.38); border-top: 1px solid rgba(255,255,255,.1); }

.calculator { background: var(--paper-2); }
.calculator-shell { display: grid; grid-template-columns: minmax(0, 1fr) 390px; margin-top: 68px; background: var(--white); border: 1px solid var(--line); box-shadow: 0 24px 80px rgba(24,35,29,.1); }
.estimate-form { min-height: 670px; padding: 46px; }
.form-progress { display: flex; align-items: center; margin-bottom: 44px; gap: 18px; color: var(--muted); font-size: .76rem; text-transform: uppercase; }
.progress-track { position: relative; flex: 1; height: 3px; background: var(--paper-2); overflow: hidden; }
.progress-track i { position: absolute; inset: 0 auto 0 0; width: 25%; background: var(--blue); transition: width 220ms ease; }
.form-step { display: none; min-width: 0; margin: 0; padding: 0; border: 0; }
.form-step.is-active { display: block; }
.form-step legend { width: 100%; margin-bottom: 12px; font-size: clamp(1.8rem, 3vw, 3rem); font-weight: 760; line-height: 1; }
.step-help { margin-bottom: 28px; color: var(--muted); font-size: .82rem; }
.choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.choice-grid label,
.segmented label { position: relative; cursor: pointer; }
.choice-grid input,
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.choice-grid label > span { display: grid; grid-template-columns: 30px 1fr; min-height: 94px; padding: 18px; gap: 3px 9px; background: var(--paper); border: 1px solid transparent; border-radius: 3px; transition: border-color 160ms ease, background 160ms ease; }
.choice-grid label > span i { grid-row: 1 / span 2; color: var(--teal); font-size: .65rem; font-style: normal; font-weight: 850; }
.choice-grid label > span small { color: var(--muted); }
.choice-grid label:hover > span,
.choice-grid input:focus-visible + span { border-color: var(--teal); }
.choice-grid input:checked + span { background: #eef3ee; border-color: var(--teal); box-shadow: inset 4px 0 0 var(--teal); }
.systems-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.range-row { display: flex; justify-content: space-between; gap: 20px; margin: 12px 0 14px; font-weight: 700; }
.range-row output { color: var(--teal); font-size: 1.2rem; }
.area-range { width: 100%; height: 6px; margin: 18px 0 8px; accent-color: var(--teal); }
.range-labels { display: flex; justify-content: space-between; color: var(--muted); font-size: .72rem; }
.segmented { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 46px; padding: 4px; gap: 4px; background: var(--paper); border-radius: 3px; }
.segmented span { display: grid; place-items: center; min-height: 48px; padding: 8px; text-align: center; border: 1px solid transparent; border-radius: 2px; font-size: .8rem; font-weight: 750; }
.segmented input:checked + span { background: var(--white); border-color: var(--line); }
.contact-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.contact-grid label,
.comment-field { color: var(--muted); font-size: .72rem; font-weight: 750; }
.contact-grid input,
.comment-field textarea { display: block; width: 100%; margin-top: 7px; padding: 13px 14px; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 3px; resize: vertical; }
.contact-grid input { height: 52px; }
.contact-grid input:focus,
.comment-field textarea:focus { outline: 2px solid var(--teal); outline-offset: 1px; }
.comment-field { display: block; margin-top: 14px; }
.consent { display: flex; align-items: flex-start; margin-top: 18px; gap: 10px; color: var(--muted); font-size: .76rem; }
.consent input { width: 18px; height: 18px; margin: 2px 0 0; accent-color: var(--teal); }
.field-error { min-height: 1.4em; margin: 10px 0 0; color: var(--danger); font-size: .76rem; }
.form-actions { display: flex; margin-top: 32px; gap: 10px; }

.estimate-panel { display: flex; flex-direction: column; min-width: 0; padding: 34px; color: var(--white); background: var(--ink-2); }
.estimate-status { display: flex; justify-content: space-between; margin-bottom: 44px; gap: 12px; color: rgba(255,255,255,.45); font-size: .64rem; text-transform: uppercase; }
.estimate-status i { padding: 4px 7px; color: var(--ink); background: var(--acid); border-radius: 2px; font-style: normal; font-weight: 850; }
.estimate-panel > p { margin-bottom: 8px; color: var(--muted-light); font-size: .72rem; font-weight: 800; text-transform: uppercase; }
.estimate-panel > strong { margin-bottom: 28px; color: var(--acid); font-size: clamp(1.8rem, 3vw, 2.75rem); line-height: 1; overflow-wrap: anywhere; }
.estimate-summary { margin: 0; }
.estimate-summary div { display: grid; grid-template-columns: 82px minmax(0,1fr); padding: 13px 0; gap: 12px; border-top: 1px solid var(--line-dark); }
.estimate-summary dt { color: rgba(255,255,255,.44); font-size: .72rem; }
.estimate-summary dd { margin: 0; text-align: right; overflow-wrap: anywhere; font-size: .78rem; }
.estimate-breakdown { margin-top: 26px; padding: 15px 0; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.estimate-breakdown p { display: grid; grid-template-columns: 1fr auto; margin: 0; padding: 5px 0; gap: 12px; color: rgba(255,255,255,.58); font-size: .7rem; }
.estimate-breakdown b { color: var(--white); }
.estimate-factors { display: grid; margin-top: 24px; gap: 5px; }
.estimate-factors b { font-size: .72rem; }
.estimate-factors span { color: rgba(255,255,255,.45); font-size: .66rem; }
.estimate-panel > small { margin-top: auto; padding-top: 28px; color: rgba(255,255,255,.4); font-size: .67rem; }

.input-check { background: var(--white); }
.input-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 90px; }
.input-layout ol { margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.input-layout li { display: grid; grid-template-columns: 42px 1fr; padding: 22px 0; gap: 14px; border-bottom: 1px solid var(--line); }
.input-layout li > span { color: var(--teal); font-size: .68rem; font-weight: 850; }
.input-layout li div { display: grid; gap: 2px; }
.input-layout li b { font-size: .92rem; }
.input-layout li small { color: var(--muted); }

.closing { padding: 96px 0; color: var(--white); background: var(--teal); }
.closing-inner { display: grid; grid-template-columns: 120px minmax(0,1fr) 330px; align-items: center; gap: 46px; }
.closing-code { align-self: start; color: rgba(255,255,255,.5); font-size: .68rem; font-weight: 800; }
.closing .section-kicker { color: var(--acid); }
.closing h2 { max-width: 800px; font-size: clamp(2.4rem, 4.5vw, 4.7rem); }
.closing-inner > div:nth-child(2) > p:last-child { max-width: 660px; margin: 25px 0 0; color: rgba(255,255,255,.62); }
.closing-action { display: grid; gap: 10px; }
.closing-action small { color: rgba(255,255,255,.56); font-size: .68rem; }

.site-footer { padding: 44px 0 22px; color: rgba(255,255,255,.66); background: var(--ink); }
.footer-main { display: grid; grid-template-columns: 220px 1fr auto; align-items: start; gap: 50px; }
.footer-brand { color: var(--white); }
.footer-main b { color: var(--white); font-size: .78rem; text-transform: uppercase; }
.footer-main p { max-width: 720px; margin: 8px 0 0; font-size: .76rem; }
.footer-main > a { color: var(--acid); font-size: .78rem; font-weight: 750; }
.footer-meta { display: flex; justify-content: space-between; margin-top: 34px; padding-top: 18px; color: rgba(255,255,255,.35); border-top: 1px solid var(--line-dark); font-size: .66rem; text-transform: uppercase; }

.mobile-cta { display: none; }

.result-dialog { width: min(calc(100% - 32px), 650px); padding: 42px; border: 0; border-radius: var(--radius); box-shadow: 0 24px 80px rgba(0,0,0,.32); }
.result-dialog.is-fallback-open { position: fixed; z-index: 500; inset: 50% auto auto 50%; margin: 0; transform: translate(-50%,-50%); }
.result-dialog::backdrop { background: rgba(4,8,6,.78); }
.result-dialog h2 { margin-bottom: 24px; color: var(--teal); font-size: clamp(2rem, 5vw, 3.7rem); overflow-wrap: anywhere; }
.result-dialog > p:not(.section-kicker) { margin: 24px 0; color: var(--muted); }
.dialog-breakdown { border-top: 1px solid var(--line); }
.dialog-breakdown div { display: grid; grid-template-columns: 1fr auto; padding: 12px 0; border-bottom: 1px solid var(--line); }
.dialog-breakdown span { color: var(--muted); font-size: .78rem; }
.dialog-close { position: absolute; top: 12px; right: 12px; width: 38px; height: 38px; color: var(--ink); background: transparent; border: 0; border-radius: 50%; cursor: pointer; font-size: 1.6rem; }
.dialog-actions { display: flex; flex-wrap: wrap; gap: 10px; }

/* v1.2: result-focused service cards */
.service-stages { overflow: hidden; }
.stage-card { min-height: 480px; overflow: hidden; }
.stage-card > p:not(.card-label) { max-width: 31ch; font-size: .92rem; }
.card-objects { display: block; margin-top: auto; padding-top: 22px; border-top: 1px solid var(--line); }
.stage-card-primary .card-objects { border-color: rgba(255,255,255,.15); }
.service-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-top: 22px;
  padding: 14px 0 0;
  color: inherit;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--line);
  cursor: pointer;
  font-size: .75rem;
  font-weight: 800;
  text-align: left;
}
.stage-card-primary .service-toggle { border-color: rgba(255,255,255,.15); }
.service-toggle b { color: var(--teal); font-size: 1.35rem; font-weight: 400; transition: transform 220ms ease; }
.stage-card-primary .service-toggle b { color: var(--acid); }
.stage-card.is-open .service-toggle b { transform: none; }
.service-detail {
  position: absolute;
  z-index: 3;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: 34px;
  color: var(--ink);
  background: var(--white);
  transform: translateY(calc(100% - 5px));
  transition: transform 320ms cubic-bezier(.22,.76,.28,1);
}
.stage-card-primary .service-detail { color: var(--white); background: var(--ink-2); }
.stage-card:hover .service-detail,
.stage-card.is-open .service-detail { transform: translateY(0); }
.service-detail-close { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 0 0 14px; color: var(--muted); background: transparent; border: 0; border-bottom: 1px solid var(--line); cursor: pointer; font-size: .67rem; font-weight: 800; text-transform: uppercase; }
.service-detail-close b { color: var(--teal); font-size: 1.2rem; }
.stage-card-primary .service-detail-close { color: rgba(255,255,255,.5); border-color: rgba(255,255,255,.15); }
.stage-card-primary .service-detail-close b { color: var(--acid); }
.service-detail > div { padding: 16px 0; border-bottom: 1px solid var(--line); }
.stage-card-primary .service-detail > div { border-color: rgba(255,255,255,.15); }
.service-detail span { display: block; margin-bottom: 6px; color: var(--teal); font-size: .65rem; font-weight: 850; text-transform: uppercase; }
.stage-card-primary .service-detail span { color: var(--acid); }
.service-detail p { margin: 0; color: var(--muted); font-size: .8rem; }
.stage-card-primary .service-detail p { color: rgba(255,255,255,.68); }
.service-detail a { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding: 15px 0; color: var(--teal); border-top: 1px solid var(--line); font-size: .82rem; font-weight: 850; }
.stage-card-primary .service-detail a { color: var(--acid); border-color: rgba(255,255,255,.15); }

/* v1.2: interactive systems map */
.systems-map { color: var(--white); background: var(--ink-3); overflow: hidden; }
.systems-map .section-kicker { color: var(--acid); }
.systems-map-head { display: grid; grid-template-columns: minmax(0,1.25fr) minmax(300px,.75fr); align-items: end; gap: 80px; }
.map-note { padding: 20px 0 2px 22px; border-left: 1px solid rgba(255,255,255,.18); }
.map-note b { color: var(--acid); font-size: .68rem; text-transform: uppercase; }
.map-note p { margin: 8px 0 0; color: var(--muted-light); font-size: .82rem; }
.systems-map-shell { display: grid; grid-template-columns: minmax(0,1.28fr) minmax(330px,.72fr); margin-top: 66px; border: 1px solid rgba(255,255,255,.18); box-shadow: 0 30px 90px rgba(0,0,0,.25); }
.object-map { min-width: 0; color: var(--ink); background: #edf0eb; }
.map-toolbar { display: grid; grid-template-columns: 130px 1fr auto; align-items: center; min-height: 52px; padding: 0 18px; gap: 18px; border-bottom: 1px solid var(--line); font-size: .66rem; }
.map-toolbar span { color: var(--teal); font-weight: 850; }
.map-toolbar small { color: var(--muted); }
.map-canvas { position: relative; height: 600px; background-color: #f6f7f4; background-size: 28px 28px; background-image: linear-gradient(#dfe4de 1px, transparent 1px), linear-gradient(90deg,#dfe4de 1px,transparent 1px); overflow: hidden; }
.floor-zone { position: absolute; display: grid; align-content: end; padding: 18px; background: rgba(255,255,255,.76); border: 1px solid #a7b0aa; box-shadow: inset 0 0 0 6px rgba(255,255,255,.65); }
.floor-zone span { color: var(--teal); font-size: .64rem; font-weight: 850; }
.floor-zone b { font-size: .82rem; }
.floor-zone small { color: var(--muted); font-size: .66rem; }
.floor-main { inset: 54px 41% 78px 42px; }
.floor-service { inset: 54px 38px 330px 62%; }
.floor-technical { inset: 292px 38px 78px 62%; }
.map-route { position: absolute; z-index: 2; height: 4px; opacity: .22; transform-origin: left; transition: opacity 220ms ease, height 220ms ease, filter 220ms ease; }
.route-vent { top: 170px; left: 10%; width: 70%; background: var(--blue); transform: rotate(8deg); }
.route-cooling { top: 338px; left: 17%; width: 63%; background: var(--teal); transform: rotate(-5deg); }
.route-heating { top: 250px; left: 26%; width: 48%; background: #d28c45; transform: rotate(90deg); }
.route-water { top: 438px; left: 12%; width: 70%; background: #3a9dc8; transform: rotate(-9deg); }
.map-canvas[data-active-system="ventilation"] .route-vent,
.map-canvas[data-active-system="cooling"] .route-cooling,
.map-canvas[data-active-system="heating"] .route-heating,
.map-canvas[data-active-system="water"] .route-water,
.map-canvas[data-active-system="automation"] .map-route,
.map-canvas[data-active-system="service"] .map-route { height: 6px; opacity: .95; filter: saturate(1.25); }
.map-node { position: absolute; z-index: 4; display: grid; grid-template-columns: 24px 1fr; align-items: center; min-width: 142px; min-height: 48px; padding: 7px 11px; gap: 8px; color: var(--ink); background: rgba(255,255,255,.94); border: 1px solid #a8b2ab; border-radius: 3px; cursor: pointer; text-align: left; box-shadow: 0 10px 24px rgba(17,25,21,.12); transition: color 180ms ease, background 180ms ease, border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease; }
.map-node span { display: grid; place-items: center; width: 24px; height: 24px; color: var(--teal); background: var(--paper-2); border-radius: 50%; font-size: .58rem; font-weight: 850; }
.map-node b { font-size: .7rem; overflow-wrap: anywhere; }
.map-node:hover,
.map-node:focus-visible { transform: translateY(-3px); border-color: var(--teal); box-shadow: 0 15px 30px rgba(17,25,21,.18); }
.map-node.is-active { color: var(--ink); background: var(--acid); border-color: var(--acid-deep); }
.map-node.is-active span { color: var(--white); background: var(--ink); }
.node-vent { top: 104px; left: 10%; }
.node-cooling { top: 208px; right: 9%; }
.node-heating { top: 302px; left: 31%; }
.node-water { right: 9%; bottom: 84px; }
.node-automation { left: 8%; bottom: 90px; }
.node-service { right: 29%; bottom: 24px; }
.map-legend { display: flex; align-items: center; min-height: 52px; padding: 0 18px; gap: 18px; border-top: 1px solid var(--line); font-size: .65rem; }
.map-legend span { display: flex; align-items: center; gap: 7px; }
.map-legend i { width: 11px; height: 11px; background: var(--acid); border: 1px solid var(--acid-deep); }
.map-legend span:nth-child(2) i { background: var(--blue); border-color: var(--blue); opacity: .45; }
.map-legend small { margin-left: auto; color: var(--muted); }
.system-detail { display: flex; flex-direction: column; min-width: 0; padding: 34px; color: var(--white); background: var(--ink); }
.system-detail.is-updating { opacity: .72; }
.system-detail-head { display: flex; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid var(--line-dark); color: rgba(255,255,255,.45); font-size: .65rem; text-transform: uppercase; }
.system-detail-head span { color: var(--acid); font-weight: 850; }
.system-detail .panel-kicker { margin: 54px 0 15px; color: var(--acid); }
.system-detail h3 { margin-bottom: 26px; font-size: clamp(2.2rem,4vw,4.2rem); }
.system-detail-grid { border-top: 1px solid var(--line-dark); }
.system-detail-grid > div { padding: 16px 0; border-bottom: 1px solid var(--line-dark); }
.system-detail-grid span { display: block; margin-bottom: 5px; color: rgba(255,255,255,.42); font-size: .62rem; font-weight: 850; text-transform: uppercase; }
.system-detail-grid p { margin: 0; color: rgba(255,255,255,.7); font-size: .77rem; }
.system-detail .button { align-self: flex-start; margin-top: auto; }
.systems-mobile { display: none; }

/* v1.2: interactive process */
.process-interactive { margin-top: 66px; border: 1px solid var(--line-dark); }
.process-timeline { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); border-bottom: 1px solid var(--line-dark); }
.process-timeline button { position: relative; display: grid; min-height: 132px; padding: 20px; gap: 7px; color: var(--white); background: transparent; border: 0; border-right: 1px solid var(--line-dark); cursor: pointer; text-align: left; transition: color 180ms ease, background 180ms ease; }
.process-timeline button:last-child { border-right: 0; }
.process-timeline button::after { content: ""; position: absolute; right: 0; bottom: -2px; left: 0; height: 3px; background: var(--acid); transform: scaleX(0); transition: transform 200ms ease; }
.process-timeline button:hover,
.process-timeline button:focus-visible { background: rgba(255,255,255,.06); }
.process-timeline button.is-active { color: var(--ink); background: var(--acid); }
.process-timeline button.is-active::after { transform: scaleX(1); }
.process-timeline span { color: var(--acid); font-size: .62rem; font-weight: 850; }
.process-timeline .is-active span { color: var(--teal); }
.process-timeline b { align-self: end; font-size: .86rem; }
.process-timeline small { color: rgba(255,255,255,.4); font-size: .62rem; }
.process-timeline .is-active small { color: rgba(11,18,16,.62); }
.process-detail { display: grid; grid-template-columns: 170px minmax(0,1fr); padding: 38px; gap: 0 42px; transition: opacity 160ms ease, transform 160ms ease; }
.process-detail.is-updating { opacity: .42; transform: translateY(6px); }
.process-detail-code { grid-row: 1 / span 4; display: flex; flex-direction: column; justify-content: space-between; padding-right: 26px; border-right: 1px solid var(--line-dark); color: rgba(255,255,255,.42); font-size: .65rem; text-transform: uppercase; }
.process-detail-code span { color: var(--acid); font-size: 1.65rem; font-weight: 850; }
.process-detail h3 { max-width: 14ch; margin-bottom: 16px; font-size: clamp(2rem,3.5vw,3.8rem); }
.process-detail > p { max-width: 760px; color: var(--muted-light); }
.process-responsibility { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); margin-top: 26px; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.process-responsibility > div { min-height: 150px; padding: 20px; border-right: 1px solid var(--line-dark); }
.process-responsibility > div:last-child { border-right: 0; }
.process-responsibility span { color: var(--acid); font-size: .62rem; font-weight: 850; text-transform: uppercase; }
.process-responsibility p { margin: 18px 0 0; color: rgba(255,255,255,.68); font-size: .76rem; }
.process-next { display: flex; justify-content: space-between; margin-top: 24px; gap: 24px; color: rgba(255,255,255,.45); font-size: .68rem; }
.process-next b { color: var(--white); text-align: right; }

/* v1.2: calculator feedback */
.estimate-panel,
.estimate-panel > strong,
.estimate-breakdown,
.estimate-bar { transition: opacity 160ms ease, transform 160ms ease; }
.estimate-panel.is-updating > strong,
.estimate-panel.is-updating .estimate-breakdown,
.estimate-panel.is-updating .estimate-bar { opacity: .35; transform: translateY(4px); }
.estimate-bar { display: flex; height: 8px; margin-top: 16px; gap: 3px; }
.estimate-bar i { display: block; min-width: 6px; height: 100%; transition: width 260ms ease; }
.estimate-bar i:nth-child(1) { width: 15%; background: var(--acid); }
.estimate-bar i:nth-child(2) { width: 50%; background: var(--blue); }
.estimate-bar i:nth-child(3) { width: 35%; background: var(--teal); }
.estimate-next { display: grid; margin-top: 22px; padding: 15px 0; gap: 5px; border-top: 1px solid var(--line-dark); }
.estimate-next span { color: rgba(255,255,255,.42); font-size: .62rem; text-transform: uppercase; }
.estimate-next b { font-size: .72rem; }

/* v1.2: restrained scroll reveal */
body.motion-ready .reveal-item { opacity: 0; transform: translateY(24px); }
body.motion-ready .reveal-item.is-visible { opacity: 1; transform: translateY(0); transition: opacity 520ms ease, transform 520ms cubic-bezier(.22,.76,.28,1); }

@media (max-width: 1080px) {
  .site-nav { gap: 18px; }
  .hero-inner { grid-template-columns: minmax(0,1fr) 230px; gap: 22px; }
  .service-stages { grid-template-columns: 1fr; }
  .stage-card { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .stage-card:last-child { border-bottom: 0; }
  .card-label { margin-bottom: 44px; }
  .system-matrix { grid-template-columns: repeat(2,1fr); }
  .system-matrix > * { border-bottom: 1px solid var(--line); }
  .matrix-intro { grid-column: 1 / -1; min-height: 120px; }
  .evidence-layout { grid-template-columns: 1fr; }
  .evidence-copy { max-width: 760px; }
  .proof-grid { grid-template-columns: repeat(2,1fr); }
  .proof-grid article:nth-child(2) { border-right: 0; }
  .proof-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line-dark); }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-media { min-height: 520px; }
  .scenario-panel { padding-top: 46px; }
  .closing-inner { grid-template-columns: 90px 1fr; }
  .closing-action { grid-column: 2; }
  .systems-map-shell { grid-template-columns: minmax(0,1fr) 340px; }
  .map-node { min-width: 122px; }
  .process-detail { grid-template-columns: 130px minmax(0,1fr); }
}

@media (max-width: 940px) {
  :root { --header-h: 64px; }
  .site-nav { position: fixed; inset: calc(var(--notice-h) + var(--header-h)) 0 0; display: none; flex-direction: column; align-items: flex-start; margin: 0; padding: 36px 24px; gap: 26px; color: var(--white); background: var(--ink); font-size: 1.35rem; }
  .site-nav.is-open { display: flex; }
  .site-nav a { font-size: 1.15rem; }
  .menu-toggle { display: block; margin-left: auto; }
  .header-contact { display: none; }
  .hero { min-height: auto; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-copy-block { padding: 46px 0 10px; }
  .hero-rail { display: none; }
  .hero-bottom { margin-top: 48px; }
  .split-heading,
  .process-head,
  .scenario-head,
  .calculator-head,
  .input-layout { grid-template-columns: 1fr; gap: 34px; }
  .calculator-shell { grid-template-columns: 1fr; }
  .estimate-panel { min-height: 500px; }
  .process-track { grid-template-columns: repeat(2,1fr); }
  .footer-main { grid-template-columns: 1fr; gap: 24px; }
  .footer-main > a { justify-self: start; }
  .systems-map-head { grid-template-columns: 1fr; gap: 32px; }
  .systems-map-shell { grid-template-columns: 1fr; }
  .map-canvas { height: 540px; }
  .system-detail { min-height: 620px; }
  .process-timeline { grid-template-columns: repeat(5,180px); overflow-x: auto; }
  .process-detail { grid-template-columns: 1fr; gap: 24px; }
  .process-detail-code { grid-row: auto; flex-direction: row; padding: 0 0 18px; border-right: 0; border-bottom: 1px solid var(--line-dark); }
}

@media (max-width: 760px) {
  .systems-map-shell { display: none; }
  .systems-mobile { display: block; margin-top: 40px; border-top: 1px solid var(--line-dark); }
  .mobile-system-item { border-bottom: 1px solid var(--line-dark); }
  .mobile-system-item > button { display: grid; grid-template-columns: 34px 1fr 28px; align-items: center; width: 100%; min-height: 70px; padding: 0; gap: 10px; color: var(--white); background: transparent; border: 0; cursor: pointer; text-align: left; }
  .mobile-system-item > button span { color: var(--acid); font-size: .65rem; font-weight: 850; }
  .mobile-system-item > button b { font-size: .95rem; overflow-wrap: anywhere; }
  .mobile-system-item > button i { color: var(--acid); font-size: 1.25rem; font-style: normal; font-weight: 400; text-align: right; }
  .mobile-system-panel { display: grid; max-height: 0; overflow: hidden; opacity: 0; transition: max-height 320ms ease, opacity 220ms ease; }
  .mobile-system-item.is-open .mobile-system-panel { max-height: 680px; padding-bottom: 24px; opacity: 1; }
  .mobile-system-panel > div { padding: 13px 0; border-top: 1px solid rgba(255,255,255,.09); }
  .mobile-system-panel span { display: block; margin-bottom: 5px; color: rgba(255,255,255,.42); font-size: .6rem; font-weight: 850; text-transform: uppercase; }
  .mobile-system-panel p { margin: 0; color: rgba(255,255,255,.7); font-size: .78rem; }
  .mobile-system-panel a { display: flex; justify-content: space-between; margin-top: 16px; padding: 14px 0; color: var(--acid); border-top: 1px solid var(--line-dark); font-size: .8rem; font-weight: 850; }
}

@media (max-width: 680px) {
  :root { --notice-h: 38px; }
  .header-inner,
  .section-inner,
  .hero-inner,
  .hero-bottom { width: min(calc(100% - 28px), var(--container)); }
  .demo-notice { justify-content: flex-start; height: var(--notice-h); gap: 9px; overflow: hidden; white-space: nowrap; }
  .demo-notice p { max-width: 44vw; overflow: hidden; text-overflow: ellipsis; }
  .section { padding: 82px 0; }
  h2 { font-size: 2.45rem; }
  .hero { min-height: 760px; padding-top: calc(var(--header-h) + var(--notice-h) + 28px); padding-bottom: 22px; }
  .hero-media { background-position: 61% center; }
  .hero-shade { background: rgba(6,12,9,.74); }
  .hero-grid { background-size: 42px 42px; }
  .hero-copy-block { align-self: start; padding-top: 24px; }
  .eyebrow { align-items: flex-start; flex-direction: column; margin-bottom: 18px; gap: 9px; }
  .hero h1 { margin-bottom: 20px; font-size: clamp(2.65rem, 12.2vw, 4.2rem); line-height: .91; }
  .hero-copy { margin-bottom: 24px; font-size: .94rem; }
  .hero-actions { flex-direction: column; }
  .action-unit { width: 100%; }
  .action-unit .button { width: 100%; }
  .action-unit small { display: none; }
  .hero-bottom { align-items: stretch; margin-top: 34px; }
  .hero-facts { grid-template-columns: 1fr; width: 100%; }
  .hero-facts > div { grid-template-columns: 42px 1fr; padding-top: 10px; }
  .hero-facts strong { font-size: 1.35rem; }
  .scroll-hint { display: none; }
  .scope-band { overflow-x: hidden; }
  .scope-track { justify-content: flex-start; padding-left: 14px; }
  .service-stages { margin-top: 44px; }
  .stage-card { min-height: 500px; padding: 26px 22px; }
  .card-index { top: 24px; right: 22px; }
  .system-matrix { grid-template-columns: 1fr; }
  .system-matrix > * { min-height: 168px; border-right: 0; }
  .matrix-intro { grid-column: auto; }
  .evidence-layout { gap: 44px; }
  .board-head { grid-template-columns: 1fr auto; }
  .board-head small { display: none; }
  .scheme-canvas { height: 350px; }
  .zone-a { inset: 34px 36% 54px 22px; }
  .zone-b { inset: 34px 18px 190px 68%; padding: 8px; }
  .zone-c { inset: 190px 18px 54px 68%; padding: 8px; }
  .scheme-zone b { font-size: .66rem; overflow-wrap: anywhere; }
  .scheme-zone small { display: none; }
  .line-a { left: 10%; width: 72%; }
  .line-b { left: 12%; width: 70%; }
  .board-legend { flex-wrap: wrap; gap: 10px; }
  .board-legend small { width: 100%; margin: 0; }
  .proof-grid { grid-template-columns: 1fr; }
  .proof-grid article { min-height: 190px; border-right: 0; border-bottom: 1px solid var(--line-dark); }
  .proof-grid article:last-child { border-bottom: 0; }
  .proof-grid h3 { margin-top: 34px; }
  .scenario-grid { margin-top: 42px; }
  .scenario-media { min-height: 390px; }
  .media-specs { grid-template-columns: 38px 1fr; }
  .media-specs b:nth-of-type(2),
  .media-specs small:nth-of-type(2) { display: none; }
  .scenario-details { padding: 24px 18px; }
  .scenario-tabs { overflow-x: auto; }
  .scenario-tabs button { padding: 0 12px; white-space: nowrap; }
  .scenario-panel h3 { font-size: 2.2rem; }
  .scenario-panel li { grid-template-columns: 90px 1fr; }
  .process-track { grid-template-columns: 1fr; }
  .process-track li { min-height: 205px; }
  .calculator-shell { margin-top: 42px; }
  .estimate-form { min-height: 680px; padding: 28px 18px; }
  .form-step legend { font-size: 2rem; }
  .choice-grid,
  .systems-grid { grid-template-columns: 1fr; }
  .choice-grid label > span { min-height: 78px; }
  .segmented { grid-template-columns: 1fr; margin-top: 32px; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-actions { flex-direction: column-reverse; }
  .form-actions .button { width: 100%; }
  .estimate-panel { min-height: 520px; padding: 28px 20px; }
  .closing { padding: 76px 0 96px; }
  .closing-inner { grid-template-columns: 1fr; gap: 24px; }
  .closing-action { grid-column: auto; }
  .closing-action .button { width: 100%; }
  .footer-meta { flex-direction: column; gap: 8px; }
  .mobile-cta { position: fixed; z-index: 90; right: 10px; bottom: 10px; left: 10px; display: flex; align-items: center; justify-content: space-between; min-height: 52px; padding: 0 18px; color: var(--ink); background: var(--acid); border: 1px solid rgba(11,18,16,.18); border-radius: 4px; box-shadow: 0 14px 36px rgba(0,0,0,.22); font-size: .82rem; font-weight: 850; transition: opacity 160ms ease, transform 160ms ease; }
  .mobile-cta.is-hidden { opacity: 0; pointer-events: none; transform: translateY(80px); }
  .result-dialog { padding: 34px 20px 22px; }
  .dialog-actions { flex-direction: column; }
  .dialog-actions .button { width: 100%; }
  .service-detail { padding: 26px 22px; }
  .stage-card:hover:not(.is-open) .service-detail { transform: translateY(calc(100% - 5px)); }
  .process-interactive { margin-top: 42px; }
  .process-timeline { grid-template-columns: repeat(5,160px); }
  .process-timeline button { min-height: 116px; padding: 16px; }
  .process-detail { padding: 24px 18px; }
  .process-responsibility { grid-template-columns: 1fr; }
  .process-responsibility > div { min-height: auto; padding: 17px 0; border-right: 0; border-bottom: 1px solid var(--line-dark); }
  .process-responsibility > div:last-child { border-bottom: 0; }
  .process-next { flex-direction: column; gap: 6px; }
  .process-next b { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  body.motion-ready .reveal-item { opacity: 1; transform: none; }
}

/* v1.2.1 — focused systems architecture and project documents desk */
.systems-map-shell,
.evidence > .evidence-layout,
.evidence > .proof-grid { display: none; }

.systems-map {
  position: relative;
  background-color: #08110f;
  background-image: linear-gradient(rgba(196,255,44,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(196,255,44,.035) 1px, transparent 1px);
  background-size: 24px 24px;
}
.systems-map::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(circle at 35% 36%, rgba(111,153,145,.12), transparent 42%), linear-gradient(180deg, rgba(255,255,255,.015), transparent 38%); }
.systems-map-head,
.systems-architecture { position: relative; z-index: 1; }
.systems-map-head h2 { max-width: 850px; font-size: clamp(3rem,5.1vw,6.8rem); }
.systems-architecture { margin-top: 54px; }

.system-switcher { display: grid; grid-template-columns: repeat(6,minmax(0,1fr)); border: 1px solid rgba(255,255,255,.15); background: rgba(8,17,15,.82); }
.system-switcher button { position: relative; display: grid; grid-template-columns: 28px 1fr; align-items: center; gap: 10px; min-width: 0; min-height: 76px; padding: 14px 16px; color: rgba(255,255,255,.7); background: transparent; border: 0; border-right: 1px solid rgba(255,255,255,.11); text-align: left; cursor: pointer; transition: color 200ms ease, background 200ms ease, box-shadow 200ms ease; }
.system-switcher button:last-child { border-right: 0; }
.system-switcher button::after { content: ""; position: absolute; right: 14px; bottom: -11px; left: 14px; height: 1px; background: var(--acid); opacity: 0; transform: scaleX(.35); transition: opacity 200ms ease, transform 200ms ease; }
.system-switcher button span { color: rgba(255,255,255,.38); font-size: .62rem; font-weight: 850; }
.system-switcher button b { min-width: 0; font-size: .69rem; line-height: 1.25; overflow-wrap: anywhere; }
.system-switcher button:hover { color: var(--white); background: rgba(255,255,255,.045); }
.system-switcher button.is-active { z-index: 1; color: var(--acid); background: rgba(196,255,44,.055); box-shadow: inset 0 0 0 1px var(--acid), 0 0 24px rgba(196,255,44,.07); }
.system-switcher button.is-active span { color: var(--acid); }
.system-switcher button.is-active::after { opacity: 1; transform: scaleX(1); }

.systems-workspace { display: grid; grid-template-columns: minmax(0,1fr) minmax(330px,390px); gap: 18px; margin-top: 28px; }
.blueprint-frame,
.system-panel-v121 { border: 1px solid rgba(255,255,255,.15); background: rgba(10,23,20,.94); box-shadow: 0 28px 74px rgba(0,0,0,.28); }
.blueprint-toolbar { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 20px; min-height: 48px; padding: 0 18px; border-bottom: 1px solid rgba(255,255,255,.12); font-size: .64rem; text-transform: uppercase; }
.blueprint-toolbar span { color: var(--acid); font-weight: 850; }
.blueprint-toolbar b { color: rgba(255,255,255,.68); }
.blueprint-toolbar small { color: rgba(255,255,255,.35); }
.blueprint-stage { position: relative; min-height: 560px; padding: 16px; overflow: hidden; color: #718a86; background: #0b1816; }
.blueprint-plan { display: block; width: 100%; height: 100%; min-height: 520px; }
.bp-base { fill: none; stroke: #7d9692; stroke-width: 2; opacity: .62; }
.bp-base > path:first-child { stroke-width: 3; }
.bp-door { stroke-width: 1.3; }
.bp-fixtures { stroke-width: 1; opacity: .55; }
.bp-zone-labels { fill: rgba(255,255,255,.62); stroke: none; font-size: 12px; font-weight: 850; letter-spacing: 0; }
.system-layer { color: var(--acid); fill: none; stroke: currentColor; stroke-width: 3; opacity: .045; transition: opacity 220ms ease; }
.system-layer.is-active { opacity: 1; }
.system-layer text { fill: currentColor; stroke: none; font-size: 11px; font-weight: 900; text-anchor: middle; dominant-baseline: central; }
.bp-main-line { fill: none; stroke: currentColor; stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.bp-branch { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-dasharray: 5 5; }
.bp-unit,
.bp-control { fill: #0b1816; stroke: currentColor; stroke-width: 3; filter: url(#bp-glow); }
.bp-marker circle,
.bp-node { fill: #0b1816; stroke: currentColor; stroke-width: 3; filter: url(#bp-glow); }
.bp-zone-fill { fill: rgba(196,255,44,.07); stroke: currentColor; stroke-width: 2; stroke-dasharray: 9 7; }
.bp-device { fill: rgba(196,255,44,.12); stroke: currentColor; stroke-width: 2; }
.bp-radiator { fill: none; stroke: currentColor; stroke-width: 3; }
.bp-service-route { fill: none; stroke: currentColor; stroke-width: 3; stroke-dasharray: 12 9; }
.bp-checkpoints circle { fill: #0b1816; stroke: currentColor; stroke-width: 3; filter: url(#bp-glow); }
.bp-checkpoints text { font-size: 11px; }
.blueprint-active-label { position: absolute; top: 34px; right: 34px; display: grid; gap: 4px; padding: 11px 14px; color: var(--acid); background: rgba(5,13,11,.88); border: 1px solid rgba(196,255,44,.55); box-shadow: 0 12px 30px rgba(0,0,0,.28); }
.blueprint-active-label span { color: rgba(255,255,255,.42); font-size: .55rem; font-weight: 850; text-transform: uppercase; }
.blueprint-active-label b { font-size: .7rem; }
.blueprint-footer { display: flex; align-items: center; gap: 26px; min-height: 50px; padding: 0 18px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.55); font-size: .62rem; }
.blueprint-footer span { display: flex; align-items: center; gap: 8px; }
.blueprint-footer i { width: 8px; height: 8px; border: 1px solid var(--acid); border-radius: 50%; box-shadow: 0 0 8px rgba(196,255,44,.45); }
.blueprint-footer span:nth-child(2) i { background: var(--acid); }
.blueprint-footer small { margin-left: auto; color: rgba(255,255,255,.32); }

.system-panel-v121 { display: flex; flex-direction: column; min-height: 100%; padding: 30px; transition: opacity 160ms ease, transform 160ms ease; }
.system-panel-v121.is-updating { opacity: .58; transform: translateY(3px); }
.system-panel-heading { display: flex; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.42); font-size: .58rem; text-transform: uppercase; }
.system-panel-heading span { color: var(--acid); font-weight: 900; }
.system-panel-v121 .panel-kicker { margin: 34px 0 10px; color: var(--acid); }
.system-panel-v121 h3 { margin: 0 0 22px; color: var(--white); font-size: clamp(2.4rem,4vw,4.4rem); }
.system-panel-facts { border-top: 1px solid rgba(255,255,255,.12); }
.system-panel-facts > div { padding: 15px 0; border-bottom: 1px solid rgba(255,255,255,.12); }
.system-panel-facts span { display: block; margin-bottom: 6px; color: rgba(255,255,255,.42); font-size: .55rem; font-weight: 850; text-transform: uppercase; }
.system-panel-facts p { margin: 0; color: rgba(255,255,255,.7); font-size: .72rem; line-height: 1.55; }
.system-panel-v121 .button { width: 100%; margin-top: auto; }

.documents-desk { display: grid; grid-template-columns: minmax(280px,.68fr) minmax(0,1.32fr); gap: 50px; align-items: start; }
.evidence::before { pointer-events: none; }
.documents-desk { position: relative; z-index: 1; }
.documents-intro { position: sticky; top: 100px; }
.documents-intro h2 { margin-top: 16px; font-size: clamp(3rem,4.7vw,6.2rem); }
.documents-lead { max-width: 600px; margin-top: 24px; color: rgba(255,255,255,.68); }
.document-benefits { display: grid; gap: 0; margin-top: 34px; border-top: 1px solid rgba(255,255,255,.13); }
.document-benefits article { display: grid; grid-template-columns: 38px 1fr; gap: 14px; padding: 17px 0; border-bottom: 1px solid rgba(255,255,255,.13); }
.document-benefits article > span { color: var(--acid); font-size: .6rem; font-weight: 900; }
.document-benefits b { color: var(--white); font-size: .82rem; }
.document-benefits p { margin: 4px 0 0; color: rgba(255,255,255,.55); font-size: .67rem; }
.documents-link { display: grid; grid-template-columns: 1fr auto; gap: 4px 16px; align-items: center; margin-top: 28px; padding: 18px; color: var(--white); border: 1px solid rgba(196,255,44,.52); transition: border-color 200ms ease, background 200ms ease, transform 200ms ease; }
.documents-link span { font-size: .78rem; font-weight: 850; }
.documents-link small { color: rgba(255,255,255,.45); font-size: .6rem; }
.documents-link b { grid-column: 2; grid-row: 1 / 3; color: var(--acid); font-size: 1.3rem; }
.documents-link:hover { background: rgba(196,255,44,.045); border-color: var(--acid); transform: translateY(-2px); }

.project-desk { min-width: 0; padding: 20px; background: #07100e; border: 1px solid rgba(255,255,255,.13); box-shadow: 0 34px 80px rgba(0,0,0,.3); }
.project-folder { position: relative; padding: 14px; color: #15201d; background: #111a18; border: 1px solid rgba(255,255,255,.16); box-shadow: 12px 12px 0 rgba(255,255,255,.025), 24px 24px 0 rgba(255,255,255,.015); }
.document-sheet-head { display: grid; grid-template-columns: auto 1fr auto; gap: 18px; align-items: center; min-height: 44px; padding: 0 15px; color: rgba(255,255,255,.72); background: #101816; font-size: .59rem; text-transform: uppercase; }
.document-sheet-head span,
.document-sheet-head small { color: var(--acid); font-weight: 850; }
.document-sheet-head b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.document-sheet { min-height: 470px; padding: 24px; overflow: hidden; background-color: #f1f2ed; background-image: linear-gradient(rgba(31,54,49,.055) 1px, transparent 1px), linear-gradient(90deg, rgba(31,54,49,.055) 1px, transparent 1px); background-size: 20px 20px; transition: opacity 160ms ease, transform 160ms ease; }
.project-folder.is-updating .document-sheet { opacity: .35; transform: translateY(3px); }
.document-stamp { display: grid; grid-template-columns: 1.8fr repeat(3,.7fr); border-top: 2px solid #273a35; background: #f1f2ed; }
.document-stamp > div { min-height: 50px; padding: 8px 10px; border-right: 1px solid #7e8d89; }
.document-stamp > div:last-child { border-right: 0; }
.document-stamp span { display: block; color: #66736f; font-size: .5rem; text-transform: uppercase; }
.document-stamp b { display: block; margin-top: 4px; font-size: .57rem; }
.document-demo-mark { position: absolute; top: 64px; right: 30px; padding: 5px 8px; color: rgba(21,32,29,.44); border: 1px solid rgba(21,32,29,.3); font-size: .62rem; font-weight: 900; }

.doc-plan-layout { display: grid; grid-template-columns: 1fr 160px; gap: 20px; height: 100%; }
.doc-plan-svg { width: 100%; height: 360px; color: #263d37; }
.doc-plan-svg .plan-base { fill: rgba(255,255,255,.35); stroke: currentColor; stroke-width: 2; }
.doc-plan-svg .plan-system { fill: none; stroke: #6f9c00; stroke-width: 3; }
.doc-plan-svg .plan-node { fill: #d4ff3e; stroke: #263d37; stroke-width: 2; }
.doc-legend { align-self: start; padding: 14px; border: 1px solid #8e9c98; background: rgba(255,255,255,.5); }
.doc-legend b { display: block; margin-bottom: 12px; font-size: .62rem; text-transform: uppercase; }
.doc-legend span { display: flex; align-items: center; gap: 8px; margin-top: 9px; color: #42524e; font-size: .55rem; }
.doc-legend i { width: 8px; height: 8px; border-radius: 50%; background: #739f00; }
.doc-table { width: 100%; border-collapse: collapse; font-size: .61rem; }
.doc-table caption { padding: 0 0 18px; color: #263d37; font-size: 1.05rem; font-weight: 900; text-align: left; }
.doc-table th,
.doc-table td { padding: 10px 9px; border: 1px solid #9da8a5; text-align: left; }
.doc-table th { color: #5e6c68; background: rgba(38,61,55,.08); font-size: .5rem; text-transform: uppercase; }
.doc-table td:last-child { font-weight: 850; }
.doc-checklist { display: grid; gap: 10px; }
.doc-checklist h3,
.doc-more h3 { margin: 0 0 12px; color: #263d37; font-size: 1.15rem; }
.doc-checklist article { display: grid; grid-template-columns: 28px 1fr auto; gap: 10px; align-items: center; padding: 11px; border: 1px solid #a0aba8; background: rgba(255,255,255,.4); }
.doc-checklist article span { display: grid; place-items: center; width: 22px; height: 22px; color: #263d37; border: 2px solid #7fa800; border-radius: 50%; font-size: .65rem; font-weight: 900; }
.doc-checklist article b { font-size: .67rem; }
.doc-checklist article small { color: #63716d; font-size: .52rem; }
.doc-more-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; }
.doc-more-grid article { min-height: 105px; padding: 15px; border: 1px solid #9ba7a3; background: rgba(255,255,255,.45); }
.doc-more-grid span { color: #739f00; font-size: .56rem; font-weight: 900; }
.doc-more-grid b { display: block; margin-top: 24px; font-size: .72rem; }

.document-tabs { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 10px; margin-top: 18px; }
.document-tabs button { min-width: 0; min-height: 126px; padding: 14px; color: rgba(255,255,255,.68); background: #0d1715; border: 1px solid rgba(255,255,255,.15); text-align: left; cursor: pointer; transition: transform 200ms ease, border-color 200ms ease, color 200ms ease, box-shadow 200ms ease; }
.document-tabs button:hover { color: var(--white); border-color: rgba(255,255,255,.34); transform: translateY(-3px); }
.document-tabs button.is-active { color: var(--acid); border-color: var(--acid); box-shadow: 0 0 24px rgba(196,255,44,.08); }
.document-tabs span { display: block; color: inherit; font-size: .66rem; font-weight: 900; }
.document-tabs b { display: block; margin-top: 18px; font-size: .68rem; line-height: 1.25; }
.document-tabs small { display: block; margin-top: 5px; color: rgba(255,255,255,.36); font-size: .54rem; }
.document-description { margin: 14px 2px 0; color: rgba(255,255,255,.5); font-size: .65rem; }

@media (max-width: 1180px) {
  .systems-workspace { grid-template-columns: minmax(0,1fr) 330px; }
  .system-switcher button { grid-template-columns: 1fr; gap: 3px; }
  .blueprint-stage { min-height: 480px; }
  .blueprint-plan { min-height: 440px; }
  .documents-desk { grid-template-columns: 1fr; }
  .documents-intro { position: static; }
  .document-benefits { grid-template-columns: repeat(2,1fr); }
  .document-benefits article:nth-child(odd) { padding-right: 20px; }
  .document-benefits article:nth-child(even) { padding-left: 20px; border-left: 1px solid rgba(255,255,255,.13); }
}

@media (max-width: 900px) {
  .system-switcher { grid-template-columns: repeat(3,1fr); }
  .system-switcher button:nth-child(3) { border-right: 0; }
  .system-switcher button:nth-child(-n+3) { border-bottom: 1px solid rgba(255,255,255,.11); }
  .systems-workspace { grid-template-columns: 1fr; }
  .system-panel-v121 { min-height: 620px; }
  .document-tabs { grid-template-columns: repeat(5,170px); overflow-x: auto; padding: 0 0 8px; scroll-snap-type: x mandatory; }
  .document-tabs button { scroll-snap-align: start; }
}

@media (max-width: 760px) {
  .systems-architecture { display: none; }
  .systems-map-head h2 { font-size: clamp(2.6rem,13vw,4.2rem); }
  .systems-map .systems-mobile { margin-top: 34px; }
  .mobile-system-item { background: rgba(8,17,15,.88); border-color: rgba(255,255,255,.14); }
  .mobile-system-item.is-open { border-color: var(--acid); box-shadow: 0 0 24px rgba(196,255,44,.06); }
  .mobile-system-item button span,
  .mobile-system-item.is-open button { color: var(--acid); }
  .documents-desk { gap: 34px; }
  .documents-intro h2 { font-size: clamp(2.7rem,12vw,4.2rem); }
  .document-benefits { grid-template-columns: 1fr; }
  .document-benefits article:nth-child(odd),
  .document-benefits article:nth-child(even) { padding: 15px 0; border-left: 0; }
  .project-desk { margin-right: -12px; margin-left: -12px; padding: 10px; }
  .project-folder { padding: 8px; }
  .document-sheet-head { grid-template-columns: 1fr auto; gap: 8px; padding: 0 10px; }
  .document-sheet-head b { grid-column: 1 / -1; grid-row: 2; padding-bottom: 8px; white-space: normal; }
  .document-sheet { min-height: 360px; padding: 14px; }
  .document-stamp { grid-template-columns: 1.4fr 1fr; }
  .document-stamp > div:nth-child(2) { border-right: 0; }
  .document-stamp > div:nth-child(-n+2) { border-bottom: 1px solid #7e8d89; }
  .document-demo-mark { display: none; }
  .doc-plan-layout { grid-template-columns: 1fr; }
  .doc-plan-svg { height: 250px; }
  .doc-legend { display: grid; grid-template-columns: repeat(2,1fr); gap: 6px; padding: 10px; }
  .doc-legend b { grid-column: 1 / -1; margin: 0; }
  .doc-table { font-size: .54rem; }
  .doc-table th,
  .doc-table td { padding: 7px 5px; }
  .doc-table th:nth-child(3),
  .doc-table td:nth-child(3) { display: none; }
  .doc-checklist article { grid-template-columns: 24px 1fr; }
  .doc-checklist article small { grid-column: 2; }
  .doc-more-grid { grid-template-columns: 1fr; }
  .document-tabs { grid-template-columns: repeat(5,152px); }
  .document-tabs button { min-height: 112px; }
}

/* v1.2.2 — conversion path, compact desktop rhythm and request drawer */
body.lead-drawer-open { overflow: hidden; }

.section-conversion {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.13);
}
.section-conversion > div { display: grid; gap: 4px; }
.section-conversion > div > span { color: var(--acid); font-size: .64rem; font-weight: 850; text-transform: uppercase; }
.section-conversion > div > b { color: var(--white); font-size: 1.08rem; }
.section-conversion > div > small { color: rgba(255,255,255,.5); }
.section-conversion .button { flex: 0 0 auto; }
.documents-conversion { position: relative; z-index: 1; }

.calculator-head > div:last-child > p { margin: 0 0 14px; color: var(--muted); }
.calculator-contact-prompt { display: block; max-width: 42ch; color: var(--teal); font-size: .86rem; line-height: 1.5; }

.floating-lead {
  position: fixed;
  z-index: 155;
  top: 50%;
  right: 16px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  width: 66px;
  height: 72px;
  padding: 0;
  color: var(--white);
  background: transparent;
  border: 0;
  transform: translateY(-50%);
  cursor: pointer;
}
.floating-lead-label {
  position: absolute;
  right: 58px;
  width: max-content;
  padding: 10px 13px;
  color: var(--white);
  background: #0b1715;
  border: 1px solid rgba(196,255,44,.3);
  box-shadow: 0 12px 34px rgba(0,0,0,.22);
  font-size: .68rem;
  font-weight: 850;
  opacity: 0;
  transform: translateX(8px);
  pointer-events: none;
  transition: opacity 200ms ease, transform 200ms ease;
}
.hvac-module {
  position: relative;
  display: grid;
  place-items: center;
  width: 56px;
  height: 62px;
  background: linear-gradient(150deg,#162520,#091411);
  border: 1px solid rgba(255,255,255,.2);
  border-right-color: var(--acid);
  border-radius: 5px;
  box-shadow: 0 14px 40px rgba(0,0,0,.26);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}
.hvac-module::before,
.hvac-module::after { content: ""; position: absolute; left: 7px; right: 7px; height: 1px; background: rgba(255,255,255,.12); }
.hvac-module::before { top: 7px; }
.hvac-module::after { bottom: 7px; }
.hvac-module > em { position: absolute; right: 5px; bottom: 4px; width: 4px; height: 4px; background: var(--acid); border-radius: 50%; box-shadow: 0 0 8px rgba(196,255,44,.7); }
.hvac-fan { position: relative; display: block; width: 31px; height: 31px; border: 1px solid rgba(196,255,44,.58); border-radius: 50%; }
.hvac-fan::after { content: ""; position: absolute; inset: 12px; background: var(--acid); border-radius: 50%; }
.hvac-fan b { position: absolute; top: 4px; left: 13px; width: 5px; height: 11px; background: rgba(196,255,44,.78); border-radius: 60% 60% 40% 40%; transform-origin: 2.5px 11.5px; }
.hvac-fan b:nth-child(2) { transform: rotate(120deg); }
.hvac-fan b:nth-child(3) { transform: rotate(240deg); }
.floating-lead:hover .floating-lead-label,
.floating-lead:focus-visible .floating-lead-label { opacity: 1; transform: translateX(0); }
.floating-lead:hover .hvac-module,
.floating-lead:focus-visible .hvac-module { border-color: rgba(196,255,44,.72); box-shadow: 0 0 28px rgba(196,255,44,.14), 0 14px 40px rgba(0,0,0,.28); transform: translateX(-4px); }
.floating-lead:hover .hvac-fan,
.floating-lead:focus-visible .hvac-fan { animation: hvac-spin 1.8s linear infinite; }
@keyframes hvac-spin { to { transform: rotate(360deg); } }

.lead-overlay {
  position: fixed;
  z-index: 190;
  inset: 0;
  background: rgba(2,8,6,.62);
  backdrop-filter: blur(3px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 260ms ease, visibility 260ms ease;
}
.lead-drawer {
  position: fixed;
  z-index: 200;
  top: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  width: clamp(360px,33vw,500px);
  height: 100dvh;
  padding: 38px 40px 32px;
  overflow-y: auto;
  color: var(--white);
  background-color: #091411;
  background-image: linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size: 26px 26px;
  border-left: 1px solid rgba(196,255,44,.26);
  box-shadow: -28px 0 80px rgba(0,0,0,.36);
  transform: translateX(104%);
  visibility: hidden;
  transition: transform 280ms ease, visibility 280ms ease;
}
body.lead-drawer-open .lead-overlay { opacity: 1; visibility: visible; }
body.lead-drawer-open .lead-drawer { transform: translateX(0); visibility: visible; }
.lead-drawer-close { position: absolute; top: 18px; right: 18px; width: 42px; height: 42px; color: var(--white); background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.18); border-radius: 4px; cursor: pointer; font-size: 1.55rem; transition: color 180ms ease, border-color 180ms ease; }
.lead-drawer-close:hover,
.lead-drawer-close:focus-visible { color: var(--acid); border-color: var(--acid); }
.lead-drawer-code { display: flex; justify-content: space-between; gap: 20px; padding-right: 45px; color: rgba(255,255,255,.42); font-size: .58rem; font-weight: 850; text-transform: uppercase; }
.lead-drawer-code b { color: var(--acid); }
.lead-drawer-intro { margin: 62px 0 32px; }
.lead-drawer-intro h2 { margin: 0 0 18px; font-size: clamp(2.8rem,5vw,4.9rem); line-height: .94; }
.lead-drawer-intro > p:last-child { max-width: 37ch; color: rgba(255,255,255,.6); }
.lead-form { display: grid; gap: 17px; }
.lead-form[hidden],
.lead-success[hidden] { display: none !important; }
.lead-form label { display: grid; gap: 8px; }
.lead-form label > span { color: rgba(255,255,255,.72); font-size: .68rem; font-weight: 800; }
.lead-form input,
.lead-form textarea { width: 100%; padding: 14px 15px; color: var(--white); background: rgba(255,255,255,.045); border: 1px solid rgba(255,255,255,.18); border-radius: 3px; outline: 0; font: inherit; resize: vertical; transition: border-color 180ms ease, box-shadow 180ms ease; }
.lead-form input { min-height: 50px; }
.lead-form input:focus,
.lead-form textarea:focus { border-color: var(--acid); box-shadow: 0 0 0 3px rgba(196,255,44,.08); }
.lead-form input::placeholder,
.lead-form textarea::placeholder { color: rgba(255,255,255,.3); }
.lead-form .button { width: 100%; margin-top: 4px; }
.lead-form > small,
.lead-success > small { color: rgba(255,255,255,.4); font-size: .6rem; line-height: 1.55; }
.lead-form-error { min-height: 18px; margin: -5px 0; color: #ffb7a8; font-size: .68rem; }
.lead-success { margin: auto 0; padding: 32px 0; }
.lead-success-mark { display: grid; place-items: center; width: 58px; height: 58px; margin-bottom: 24px; color: var(--ink); background: var(--acid); border-radius: 50%; font-size: 1.4rem; font-weight: 900; box-shadow: 0 0 36px rgba(196,255,44,.16); }
.lead-success h3 { margin-bottom: 12px; font-size: clamp(2.2rem,4vw,3.7rem); }
.lead-success p { margin-bottom: 28px; color: rgba(255,255,255,.64); }
.lead-success .button { margin-bottom: 18px; }

@media (min-width: 1024px) {
  .section { padding: 96px 0; }
  .services .section-heading { align-items: end; }
  .service-stages { margin-top: 48px; }
  .scenario-grid { margin-top: 48px; }
  .process-interactive { margin-top: 46px; }
  .calculator-shell { margin-top: 44px; }
  .input-layout { gap: 64px; }
  .input-layout li { padding: 17px 0; }
  .closing { padding: 72px 0; }
}

@media (min-width: 1200px) {
  .stage-card { min-height: 420px; padding: 28px; }
  .stage-card h3 { margin-bottom: 14px; }
  .stage-card > small { margin-top: 16px; }
  .systems-architecture { margin-top: 34px; }
  .systems-workspace { margin-top: 20px; }
  .system-switcher button { min-height: 64px; padding: 12px 10px; }
  .blueprint-stage { min-height: 440px; padding: 12px; }
  .blueprint-plan { min-height: 410px; }
  .system-panel-v121 { padding: 24px; }
  .system-panel-v121 .panel-kicker { margin: 22px 0 7px; }
  .system-panel-v121 h3 { margin-bottom: 13px; font-size: clamp(2.3rem,3vw,3.7rem); }
  .system-panel-facts > div { padding: 10px 0; }
  .section-conversion { margin-top: 22px; padding-top: 18px; }
  .documents-desk { gap: 38px; }
  .documents-intro h2 { font-size: clamp(3rem,3.8vw,5.1rem); }
  .documents-lead { margin-top: 20px; }
  .document-benefits { margin-top: 22px; }
  .document-benefits article { padding: 11px 0; }
  .documents-link { margin-top: 22px; }
  .project-desk { padding: 15px; }
  .document-sheet { min-height: 390px; padding: 18px; }
  .doc-plan-svg { height: 275px; }
  .document-tabs { margin-top: 12px; }
  .document-tabs button { min-height: 104px; padding: 11px; }
  .document-tabs b { margin-top: 12px; }
}

@media (max-width: 760px) {
  .section-conversion { align-items: stretch; flex-direction: column; gap: 20px; margin-top: 24px; }
  .section-conversion .button { width: 100%; }
  .calculator-contact-prompt { font-size: .8rem; }
  .floating-lead { top: auto; right: 12px; bottom: 12px; width: 58px; height: 64px; transform: none; }
  .floating-lead-label { display: none; }
  .hvac-module { width: 54px; height: 58px; }
  .lead-drawer { top: auto; bottom: 0; width: 100%; max-width: none; height: min(86dvh,720px); padding: 27px 20px 22px; border-top: 1px solid rgba(196,255,44,.28); border-left: 0; border-radius: 8px 8px 0 0; transform: translateY(104%); }
  body.lead-drawer-open .lead-drawer { transform: translateY(0); }
  .lead-drawer-close { top: 12px; right: 12px; }
  .lead-drawer-code { padding-right: 44px; }
  .lead-drawer-intro { margin: 38px 0 22px; }
  .lead-drawer-intro h2 { font-size: clamp(2.45rem,13vw,3.65rem); }
  .lead-form { gap: 13px; }
  .lead-form input { min-height: 52px; }
  .lead-form textarea { min-height: 82px; }
}

@media (prefers-reduced-motion: reduce) {
  .floating-lead *,
  .lead-overlay,
  .lead-drawer { animation: none !important; transition-duration: .01ms !important; }
}

/* Mobile stability pass: one sticky header, predictable anchors and form sheet. */
@media (max-width: 760px) {
  :root {
    --header-h: 54px;
    --notice-h: 28px;
  }

  html {
    scroll-padding-top: calc(var(--header-h) + 16px);
  }

  main > section[id],
  footer[id] {
    scroll-margin-top: calc(var(--header-h) + 16px);
  }

  .demo-notice {
    position: relative;
    inset: auto;
    justify-content: flex-start;
    height: var(--notice-h);
    padding: 0 12px;
    gap: 8px;
    font-size: .58rem;
    white-space: nowrap;
  }

  .demo-notice span { flex: 0 0 auto; }
  .demo-notice p {
    flex: 1 1 auto;
    max-width: none;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .demo-notice a { display: none; }

  .site-header {
    position: sticky;
    top: 0;
    inset: auto;
    height: var(--header-h);
  }

  .header-inner { gap: 16px; }
  .brand { gap: 8px; font-size: .9rem; }
  .brand-mark { transform: scale(.84); transform-origin: left center; }
  .menu-toggle { width: 40px; height: 40px; padding: 8px; }

  .site-nav {
    position: absolute;
    inset: 100% 0 auto;
    max-height: calc(100svh - var(--header-h));
    padding: 28px 20px;
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .hero {
    min-height: auto;
    padding-top: 34px;
  }
  .hero-inner,
  .hero-copy-block { min-width: 0; }
  .hero h1,
  main h2,
  main h3 {
    max-width: 100%;
    overflow-wrap: anywhere;
  }
  .hero h1 { font-size: 2.4rem; }
  .hero-copy { max-width: 100%; overflow-wrap: anywhere; }

  .mobile-system-panel {
    max-height: 0;
    visibility: hidden;
  }
  .mobile-system-item.is-open .mobile-system-panel {
    max-height: 900px;
    visibility: visible;
  }

  .floating-lead {
    top: auto;
    right: 10px;
    bottom: max(8px, env(safe-area-inset-bottom));
    left: 10px;
    justify-content: space-between;
    width: auto;
    height: 52px;
    padding: 0 9px 0 17px;
    color: var(--ink);
    background: var(--acid);
    border: 1px solid rgba(11,18,16,.22);
    border-radius: 4px;
    box-shadow: 0 12px 30px rgba(0,0,0,.24);
    transform: none;
  }

  .floating-lead-label {
    position: static;
    display: block;
    width: auto;
    padding: 0;
    color: var(--ink);
    background: transparent;
    border: 0;
    box-shadow: none;
    font-size: .78rem;
    opacity: 1;
    transform: none;
  }

  .floating-lead .hvac-module {
    width: 36px;
    height: 36px;
    background: rgba(11,18,16,.92);
    border-color: rgba(11,18,16,.2);
    box-shadow: none;
    transform: none;
  }
  .floating-lead .hvac-module::before,
  .floating-lead .hvac-module::after { display: none; }
  .floating-lead .hvac-fan { transform: scale(.72); }
  .floating-lead:hover .hvac-module,
  .floating-lead:focus-visible .hvac-module { transform: none; }
  .floating-lead.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }
  body.lead-drawer-open .floating-lead {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }

  .site-footer {
    padding-bottom: calc(82px + env(safe-area-inset-bottom));
  }

  .lead-drawer {
    height: min(86vh, 720px);
    height: min(86svh, 720px);
    max-height: calc(100svh - 8px);
    padding-bottom: calc(22px + env(safe-area-inset-bottom));
    overscroll-behavior: contain;
    transform: translate3d(0,104%,0);
  }
  body.lead-drawer-open .lead-drawer { transform: translate3d(0,0,0); }
}