:root {
  --paper: #f3f0e8;
  --paper-2: #e8e3d8;
  --ink: #11120f;
  --muted: #74756f;
  --line: rgba(17, 18, 15, .16);
  --warm: #ff5a2f;
  --amber: #ffb000;
  --lime: #d8ff4f;
  --cool: #7dc9ff;
  --radius: 28px;
  --pad: clamp(20px, 4vw, 64px);
  --header-h: 86px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { color: inherit; }
img, svg { display: block; max-width: 100%; }
::selection { background: var(--warm); color: #fff; }

.page-noise {
  position: fixed; inset: 0; z-index: 999; pointer-events: none; opacity: .025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E");
}
.progress { position: fixed; z-index: 120; top: 0; left: 0; width: 100%; height: 3px; }
.progress span { display: block; width: 100%; height: 100%; background: var(--warm); transform: scaleX(0); transform-origin: left; }
.section-pad { padding-left: var(--pad); padding-right: var(--pad); }
.eyebrow { margin: 0; font-size: 12px; line-height: 1; letter-spacing: .16em; text-transform: uppercase; font-weight: 800; }
.eyebrow::before { content: ""; display: inline-block; width: 28px; height: 1px; margin: 0 10px 3px 0; background: currentColor; }
em { font-style: normal; color: var(--warm); }

.site-header {
  position: fixed; z-index: 100; top: 0; left: 0; right: 0; height: var(--header-h);
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  padding: 0 var(--pad); transition: background .35s ease, border-color .35s ease, color .35s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled { background: rgba(243,240,232,.84); border-color: var(--line); backdrop-filter: blur(16px); }
.site-header.on-dark { color: var(--paper); background: rgba(17,18,15,.78); border-color: rgba(255,255,255,.12); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 900; letter-spacing: .12em; justify-self: start; }
.brand-mark { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; background: var(--ink); color: var(--paper); }
.brand-mark svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2.1; stroke-linecap: round; }
.on-dark .brand-mark { background: var(--paper); color: var(--ink); }
.desktop-nav { display: flex; align-items: center; gap: clamp(20px, 3vw, 44px); font-size: 13px; font-weight: 700; }
.desktop-nav a { position: relative; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 1px; background: currentColor; transition: right .3s ease; }
.desktop-nav a:hover::after { right: 0; }
.header-cta { justify-self: end; display: inline-flex; align-items: center; gap: 18px; padding: 12px 18px; border: 1px solid currentColor; border-radius: 999px; font-size: 13px; font-weight: 800; transition: background .25s, color .25s; }
.header-cta:hover { background: var(--ink); color: var(--paper); }
.on-dark .header-cta:hover { background: var(--paper); color: var(--ink); }
.menu-toggle { display: none; justify-self: end; width: 44px; height: 44px; border: 0; border-radius: 50%; background: var(--ink); position: relative; }
.menu-toggle span { position: absolute; left: 13px; right: 13px; height: 1px; background: var(--paper); transition: transform .25s, top .25s; }
.menu-toggle span:first-child { top: 18px; }
.menu-toggle span:last-child { top: 25px; }
.menu-open .menu-toggle span:first-child { top: 22px; transform: rotate(45deg); }
.menu-open .menu-toggle span:last-child { top: 22px; transform: rotate(-45deg); }
.mobile-panel { position: fixed; z-index: 90; inset: 0; padding: 120px var(--pad) 40px; background: var(--warm); transform: translateY(-100%); visibility: hidden; transition: transform .45s cubic-bezier(.7,0,.2,1), visibility .45s; }
.menu-open .mobile-panel { transform: translateY(0); visibility: visible; }
.mobile-panel nav { display: grid; gap: 4px; }
.mobile-panel nav a { font-size: clamp(42px, 12vw, 76px); letter-spacing: -.06em; font-weight: 800; line-height: .96; border-bottom: 1px solid rgba(17,18,15,.25); padding: 12px 0; }
.mobile-panel p { position: absolute; left: var(--pad); bottom: 32px; max-width: 340px; }

.hero { min-height: 100svh; padding-top: calc(var(--header-h) + 70px); padding-bottom: 44px; position: relative; display: grid; grid-template-columns: minmax(0,1.15fr) minmax(420px,.85fr); grid-template-rows: 1fr auto; column-gap: 30px; overflow: hidden; }
.hero-copy { position: relative; z-index: 2; display: flex; flex-direction: column; justify-content: center; }
.hero h1 { margin: 24px 0 42px; font-size: clamp(67px,9.4vw,156px); line-height: .77; letter-spacing: -.085em; font-weight: 800; }
.hero-line { display: block; transform-origin: left center; }
.hero-line--offset { padding-left: clamp(20px,5.2vw,90px); }
.hero-line--accent { color: var(--warm); padding-left: clamp(0px,12vw,205px); }
.hero-bottom { max-width: 660px; display: grid; grid-template-columns: minmax(260px,1fr) auto; gap: 36px; align-items: end; }
.hero-bottom p { margin: 0; color: var(--muted); max-width: 470px; }
.hero-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 18px; }
.btn { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 0 22px; border-radius: 999px; font-size: 13px; font-weight: 800; }
.btn--dark { background: var(--ink); color: var(--paper); }
.text-link { font-size: 13px; font-weight: 750; display: inline-flex; gap: 14px; }
.text-link span { color: var(--warm); }
.hero-visual { align-self: center; justify-self: end; position: relative; width: min(46vw,690px); aspect-ratio: 1.06; border-radius: 46% 54% 60% 40% / 49% 43% 57% 51%; background: radial-gradient(circle at 36% 35%,#ffbf5d 0,#ff7b3f 34%,#ff5432 60%,#df3a29 100%); box-shadow: inset 0 0 80px rgba(255,255,255,.19), 0 35px 100px rgba(123,42,20,.16); }
.hero-orbit { position: absolute; border: 1px solid rgba(255,255,255,.35); border-radius: 50%; }
.hero-orbit--one { inset: 11% 8%; transform: rotate(-14deg); }
.hero-orbit--two { inset: 23% 17%; transform: rotate(26deg); }
.temperature-dial { position: absolute; z-index: 3; left: 50%; top: 50%; transform: translate(-50%,-50%); width: 192px; height: 192px; border: 1px solid rgba(255,255,255,.46); border-radius: 50%; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #fff; background: rgba(52,20,11,.16); backdrop-filter: blur(8px); }
.temperature-dial::before { content: ""; position: absolute; inset: 9px; border: 1px dashed rgba(255,255,255,.36); border-radius: inherit; animation: spin 22s linear infinite; }
.temperature-dial strong { font-size: 52px; line-height: 1; letter-spacing: -.07em; }
.temperature-dial small { font-size: 19px; vertical-align: top; margin-left: 4px; }
.dial-label,.dial-status { font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }
.dial-label { margin-bottom: 10px; }
.dial-status { margin-top: 12px; display: flex; align-items: center; gap: 6px; }
.dial-status i { width: 6px; height: 6px; background: var(--lime); border-radius: 50%; box-shadow: 0 0 12px var(--lime); }
.hero-pipe { position: absolute; inset: 3% 1% 6%; width: 98%; height: 91%; }
.hero-pipe-shadow { stroke: rgba(101,28,10,.18); stroke-width: 23; stroke-linecap: round; }
.hero-pipe-line { stroke: url(#pipeGradient); stroke-width: 9; stroke-linecap: round; filter: url(#pipeGlow); }
.flow-dot { fill: #fff; filter: drop-shadow(0 0 10px #fff); }
.hero-chip { position: absolute; z-index: 4; padding: 10px 14px; border-radius: 999px; background: rgba(243,240,232,.9); backdrop-filter: blur(10px); font-size: 11px; font-weight: 750; box-shadow: 0 14px 35px rgba(38,19,12,.12); }
.hero-chip span { margin-right: 7px; color: var(--warm); }
.hero-chip--a { left: -4%; top: 24%; }
.hero-chip--b { right: -3%; bottom: 18%; }
.hero-stats { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--line); margin-top: 48px; }
.hero-stats div { padding: 22px 20px 0 0; display: grid; gap: 5px; }
.hero-stats div + div { border-left: 1px solid var(--line); padding-left: 25px; }
.hero-stats strong { font-size: 20px; letter-spacing: -.03em; }
.hero-stats span { color: var(--muted); font-size: 13px; }
@keyframes spin { to { transform: rotate(360deg); } }

.scroll-expand { height: 380vh; position: relative; background: var(--paper); }
.expand-sticky { position: sticky; top: 0; height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.expand-panel { width: min(78vw,1220px); height: min(76vh,760px); border-radius: 38px; background: var(--ink); color: var(--paper); position: relative; overflow: hidden; padding: clamp(26px,4vw,62px); display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(30px,5vw,80px); }
.expand-panel::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 78% 50%,rgba(255,90,47,.16),transparent 38%), linear-gradient(120deg,transparent 0 55%,rgba(255,255,255,.025) 55% 56%,transparent 56%); }
.expand-topline { position: absolute; z-index: 3; top: 28px; left: clamp(26px,4vw,62px); right: clamp(26px,4vw,62px); display: flex; justify-content: space-between; align-items: center; }
.expand-count { font-size: 12px; letter-spacing: .14em; }
.expand-count b { color: var(--warm); font-size: 20px; }
.expand-copy { position: relative; z-index: 2; align-self: center; height: 440px; }
.expand-scene { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; opacity: 0; transform: translateY(45px); pointer-events: none; }
.expand-scene.is-active { opacity: 1; transform: translateY(0); }
.scene-kicker { color: var(--lime); font-size: 11px; letter-spacing: .17em; text-transform: uppercase; font-weight: 800; margin-bottom: 24px; }
.expand-scene h2 { margin: 0 0 28px; font-size: clamp(48px,5.2vw,86px); line-height: .93; letter-spacing: -.065em; }
.expand-scene p { margin: 0; color: rgba(243,240,232,.68); max-width: 630px; font-size: clamp(15px,1.15vw,18px); }
.cutaway-visual { position: relative; z-index: 2; align-self: center; min-height: 560px; }
.cutaway-visual svg { width: 100%; height: 100%; overflow: visible; }
.layer { transform-origin: center; }
.layer-label { position: absolute; display: flex; align-items: center; gap: 9px; border-radius: 999px; padding: 9px 12px; background: rgba(243,240,232,.11); border: 1px solid rgba(243,240,232,.18); backdrop-filter: blur(10px); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; white-space: nowrap; }
.layer-label b { width: 24px; height: 24px; display: grid; place-items: center; border-radius: 50%; background: var(--paper); color: var(--ink); font-size: 9px; }
.layer-label--finish { right: 1%; top: 20%; }
.layer-label--screed { right: -2%; top: 39%; }
.layer-label--pipe { left: 0; top: 55%; }
.layer-label--insulation { right: 3%; bottom: 18%; }
.heat-column { position: absolute; z-index: -1; bottom: 38%; width: 12%; height: 48%; border-radius: 50%; background: linear-gradient(to top,rgba(255,90,47,.54),rgba(255,176,0,0)); filter: blur(13px); transform-origin: bottom; }
.heat-column--1 { left: 27%; }
.heat-column--2 { left: 49%; height: 58%; }
.heat-column--3 { right: 16%; height: 44%; }
.expand-progress { position: absolute; left: 0; bottom: 0; width: 100%; height: 4px; background: rgba(255,255,255,.08); }
.expand-progress span { display: block; height: 100%; width: 100%; background: var(--warm); transform-origin: left; transform: scaleX(0); }

.section-heading { padding: clamp(110px,12vw,190px) 0 70px; display: grid; grid-template-columns: 1.25fr .55fr; gap: 60px; align-items: end; }
.section-heading h2 { margin: 20px 0 0; font-size: clamp(54px,7vw,112px); line-height: .88; letter-spacing: -.075em; }
.section-heading > p { margin: 0; color: var(--muted); max-width: 520px; }
.section-heading--light > p { color: rgba(243,240,232,.64); }

.principle { padding-bottom: clamp(100px,10vw,160px); }
.principle-grid { display: grid; grid-template-columns: minmax(0,1.1fr) minmax(390px,.9fr); gap: clamp(40px,6vw,100px); align-items: center; }
.principle-visual { min-height: 620px; border-radius: var(--radius); background: #ded8cc; position: sticky; top: 120px; overflow: hidden; box-shadow: inset 0 0 0 1px rgba(17,18,15,.08); }
.principle-room { position: absolute; inset: 0; perspective: 1000px; }
.room-wall { position: absolute; left: 10%; right: 10%; top: 8%; height: 56%; background: linear-gradient(160deg,#f9f6ef,#d9d2c7); transform: skewY(-4deg); transform-origin: bottom; box-shadow: inset 0 -1px rgba(17,18,15,.12); }
.window { position: absolute; width: 32%; height: 48%; left: 11%; top: 17%; border: 10px solid #f2eee6; background: linear-gradient(145deg,#bfe6f5,#7ab6d0); box-shadow: 0 16px 28px rgba(20,50,65,.12); }
.window::before,.window::after { content: ""; position: absolute; background: #f2eee6; }
.window::before { left: 48%; top: 0; bottom: 0; width: 7px; }
.window::after { left: 0; right: 0; top: 49%; height: 7px; }
.picture { position: absolute; width: 20%; aspect-ratio: .78; right: 13%; top: 20%; border: 9px solid #171813; background: linear-gradient(150deg,#ff6336 0 42%,#d8ff4f 42% 63%,#11120f 63%); }
.room-floor { position: absolute; left: 2%; right: 2%; bottom: 2%; height: 50%; background: linear-gradient(150deg,#9a9183,#d8d0c4); clip-path: polygon(9% 0,91% 0,100% 100%,0 100%); }
.room-floor svg { width: 86%; margin: 14% auto 0; }
.heat-waves { position: absolute; left: 15%; right: 15%; bottom: 16%; height: 50%; display: flex; justify-content: space-around; align-items: flex-end; opacity: .8; }
.heat-waves i { width: 13%; height: 82%; border-radius: 50%; background: linear-gradient(to top,rgba(255,90,47,.42),rgba(255,176,0,0)); filter: blur(8px); transform-origin: bottom; animation: breathe 2.8s ease-in-out infinite alternate; }
.heat-waves i:nth-child(2),.heat-waves i:nth-child(4) { height: 63%; animation-delay: -.8s; }
.heat-waves i:nth-child(3) { height: 95%; animation-delay: -1.4s; }
@keyframes breathe { to { transform: scaleY(1.13) translateY(-8px); opacity: .55; } }
.thermostat { position: absolute; right: 15%; top: 26%; width: 86px; height: 112px; border-radius: 17px; background: #11120f; color: #fff; padding: 16px; display: flex; flex-direction: column; box-shadow: 0 22px 40px rgba(17,18,15,.24); }
.thermostat small { font-size: 8px; letter-spacing: .14em; color: rgba(255,255,255,.6); }
.thermostat strong { margin-top: 9px; font-size: 28px; }
.thermostat span { width: 10px; height: 10px; border-radius: 50%; background: var(--lime); margin-top: auto; box-shadow: 0 0 12px var(--lime); }
.principle-steps { display: grid; }
.principle-step { border-top: 1px solid var(--line); padding: 30px 0; display: grid; grid-template-columns: 55px 1fr; gap: 20px; transition: opacity .35s, transform .35s; opacity: .42; }
.principle-step:last-child { border-bottom: 1px solid var(--line); }
.principle-step.is-active { opacity: 1; transform: translateX(12px); }
.principle-step > span { color: var(--warm); font-size: 12px; font-weight: 900; letter-spacing: .12em; }
.principle-step h3 { margin: 0 0 12px; font-size: clamp(25px,2.4vw,38px); letter-spacing: -.045em; }
.principle-step p { margin: 0; color: var(--muted); }

.systems { background: var(--ink); color: var(--paper); padding-bottom: clamp(100px,10vw,160px); }
.system-switch { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid rgba(255,255,255,.16); border-radius: 999px; padding: 5px; max-width: 560px; margin-bottom: 40px; }
.system-tab { border: 0; background: transparent; color: inherit; min-height: 54px; border-radius: 999px; font-weight: 800; cursor: pointer; transition: .3s; }
.system-tab span { color: var(--warm); margin-right: 10px; }
.system-tab.is-active { background: var(--paper); color: var(--ink); }
.system-stage { position: relative; min-height: 660px; }
.system-panel { position: absolute; inset: 0; opacity: 0; visibility: hidden; transform: translateY(22px); display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(34px,6vw,100px); padding: clamp(30px,5vw,70px); border-radius: var(--radius); background: #1a1b17; border: 1px solid rgba(255,255,255,.1); transition: opacity .45s, transform .45s, visibility .45s; }
.system-panel.is-active { opacity: 1; visibility: visible; transform: translateY(0); }
.system-copy { align-self: center; }
.system-tag { display: inline-flex; padding: 8px 11px; background: var(--lime); color: var(--ink); border-radius: 999px; font-size: 10px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.system-copy h3 { margin: 25px 0; font-size: clamp(44px,5vw,78px); line-height: .94; letter-spacing: -.065em; }
.system-copy > p { color: rgba(243,240,232,.66); font-size: 17px; }
.system-copy dl { margin: 38px 0 0; display: grid; }
.system-copy dl div { display: grid; grid-template-columns: 145px 1fr; gap: 20px; padding: 15px 0; border-top: 1px solid rgba(255,255,255,.12); }
.system-copy dt { color: rgba(243,240,232,.46); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }
.system-copy dd { margin: 0; font-size: 13px; }
.system-illustration { position: relative; min-height: 520px; align-self: center; border-radius: 28px; overflow: hidden; background: radial-gradient(circle at 50% 50%,rgba(255,90,47,.18),transparent 48%),#10110e; }
.system-illustration svg { position: absolute; inset: 7%; width: 86%; height: 86%; }
.boiler { position: absolute; z-index: 4; left: 8%; bottom: 9%; width: 104px; height: 135px; border: 1px solid rgba(255,255,255,.24); border-radius: 18px; background: rgba(243,240,232,.08); padding: 16px; display: flex; flex-direction: column; }
.boiler span { width: 18px; height: 18px; border-radius: 50%; background: var(--warm); box-shadow: 0 0 20px var(--warm); }
.boiler b { font-size: 10px; letter-spacing: .1em; margin-top: auto; }
.boiler i { font-size: 18px; color: var(--amber); font-style: normal; }
.manifold { position: absolute; z-index: 4; right: 8%; top: 8%; width: 145px; padding: 15px; border-radius: 16px; background: var(--paper); color: var(--ink); box-shadow: 0 20px 50px rgba(0,0,0,.25); display: grid; grid-template-columns: repeat(4,1fr); gap: 6px; }
.manifold b { grid-column: 1/-1; font-size: 9px; letter-spacing: .12em; }
.manifold span { height: 48px; border-radius: 7px; background: linear-gradient(to bottom,var(--warm) 0 28%,#c9c5bc 28% 100%); }
.electric-grid { position: absolute; inset: 0; opacity: .14; background-image: linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px); background-size: 36px 36px; transform: perspective(500px) rotateX(52deg) scale(1.2); transform-origin: bottom; }
.electric-control { position: absolute; z-index: 4; right: 9%; top: 9%; width: 112px; height: 142px; border-radius: 20px; background: var(--paper); color: var(--ink); padding: 18px; display: flex; flex-direction: column; }
.electric-control small { font-size: 9px; letter-spacing: .14em; }
.electric-control strong { font-size: 36px; margin-top: 10px; }
.electric-control i { width: 12px; height: 12px; border-radius: 50%; background: var(--warm); box-shadow: 0 0 18px var(--warm); margin-top: auto; }
.system-decision { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 24px; }
.system-decision article { border: 1px solid rgba(255,255,255,.12); border-radius: 22px; padding: 28px; }
.system-decision span { color: var(--lime); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; font-weight: 800; }
.system-decision h3 { font-size: 26px; line-height: 1.05; letter-spacing: -.04em; margin: 16px 0; }
.system-decision p { margin: 0; color: rgba(243,240,232,.56); }

.components { padding-bottom: clamp(110px,10vw,170px); }
.component-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.component-card { min-height: 390px; border: 1px solid var(--line); border-radius: 23px; padding: 24px; position: relative; overflow: hidden; display: flex; flex-direction: column; transition: transform .3s, background .3s; }
.component-card:hover { transform: translateY(-8px); background: #ebe6da; }
.component-card--wide { grid-column: span 2; }
.component-no { font-size: 11px; font-weight: 900; color: var(--warm); letter-spacing: .12em; }
.component-card h3 { margin: auto 0 14px; font-size: 29px; letter-spacing: -.045em; }
.component-card p { margin: 0; color: var(--muted); font-size: 14px; }
.component-card small { margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }
.component-icon { position: absolute; right: 20px; top: 24px; width: 120px; height: 120px; }
.pipe-icon { border-radius: 50%; border: 1px solid var(--line); }
.pipe-icon i { position: absolute; border: 7px solid transparent; border-top-color: var(--warm); border-radius: 50%; }
.pipe-icon i:nth-child(1) { inset: 15px; transform: rotate(35deg); }
.pipe-icon i:nth-child(2) { inset: 34px; transform: rotate(215deg); }
.pipe-icon i:nth-child(3) { width: 12px; height: 12px; border: 0; background: var(--amber); left: 52px; top: 52px; box-shadow: 0 0 18px var(--amber); }
.cable-icon { border-radius: 50%; background: var(--ink); }
.cable-icon i,.cable-icon i::before,.cable-icon i::after { position: absolute; content: ""; border: 3px solid var(--lime); border-radius: 50%; }
.cable-icon i { inset: 18px; border-left-color: transparent; }
.cable-icon i::before { inset: 16px; border-right-color: transparent; }
.cable-icon i::after { inset: 16px; border-top-color: transparent; }
.manifold-icon { display: flex; gap: 6px; align-items: center; justify-content: center; }
.manifold-icon::before { content: ""; position: absolute; left: 5px; right: 5px; top: 31px; height: 11px; border-radius: 8px; background: var(--warm); box-shadow: 0 47px 0 #444640; }
.manifold-icon i { width: 15px; height: 76px; border-radius: 8px; border: 1px solid var(--line); background: var(--paper); z-index: 2; }
.insulation-icon { display: grid; gap: 5px; align-content: center; }
.insulation-icon i { height: 22px; background: var(--lime); clip-path: polygon(0 30%,100% 0,100% 70%,0 100%); opacity: .5; }
.insulation-icon i:nth-child(2) { opacity: .75; }
.insulation-icon i:nth-child(3) { opacity: 1; }
.screed-icon i { position: absolute; left: 5px; right: 5px; height: 34px; transform: skewY(-8deg); }
.screed-icon i:first-child { top: 28px; background: #bbb3a5; }
.screed-icon i:last-child { top: 69px; background: #8a8378; }
.thermostat-icon { background: var(--ink); border-radius: 26px; display: grid; place-items: center; color: var(--paper); }
.thermostat-icon b { font-size: 31px; }
.thermostat-icon i { position: absolute; width: 9px; height: 9px; bottom: 15px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 12px var(--lime); }
.edge-icon { border: 2px solid var(--ink); border-top: 0; border-right: 0; }
.edge-icon i { position: absolute; left: 16px; right: 16px; bottom: 20px; height: 16px; background: var(--warm); }
.edge-icon i:last-child { left: 20px; top: 10px; bottom: 10px; width: 14px; height: auto; background: var(--amber); }
.source-icon { border-radius: 24px; background: linear-gradient(135deg,var(--cool),#d9f2ff); display: grid; place-items: center; }
.source-icon i { position: absolute; inset: 20px; border-radius: 50%; border: 2px dashed var(--ink); }
.source-icon b { font-size: 34px; }

.comparison { background: var(--ink); color: var(--paper); padding-bottom: clamp(100px,10vw,160px); }
.compare-stage { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.compare-visual { min-height: 620px; border-radius: var(--radius); overflow: hidden; position: relative; display: grid; grid-template-columns: 1fr 1fr; background: #161713; border: 1px solid rgba(255,255,255,.1); }
.compare-side { position: relative; overflow: hidden; }
.compare-side--floor { background: linear-gradient(180deg,#1f211c,#2a211a); }
.compare-side--radiator { background: linear-gradient(180deg,#1e2020,#181817); }
.compare-label { position: absolute; z-index: 3; top: 24px; left: 24px; padding: 8px 11px; border: 1px solid rgba(255,255,255,.18); border-radius: 999px; font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }
.floor-lines { position: absolute; left: 5%; right: 5%; bottom: 0; height: 34%; display: grid; gap: 17px; padding: 40px 30px; background: linear-gradient(180deg,#5a4d41,#2d2924); transform: perspective(500px) rotateX(35deg); transform-origin: bottom; }
.floor-lines i { height: 8px; border-radius: 20px; background: linear-gradient(90deg,var(--warm),var(--amber)); box-shadow: 0 0 19px rgba(255,90,47,.55); }
.floor-lines i:nth-child(even) { transform: translateX(15%); width: 85%; }
.soft-heat { position: absolute; inset: 13% 7% 28%; display: flex; align-items: flex-end; justify-content: space-around; }
.soft-heat i { width: 16%; height: 78%; border-radius: 50%; background: linear-gradient(to top,rgba(255,90,47,.46),transparent); filter: blur(10px); animation: breathe 3s ease-in-out infinite alternate; }
.soft-heat i:nth-child(2),.soft-heat i:nth-child(4) { height: 62%; animation-delay: -1s; }
.radiator { position: absolute; left: 13%; right: 13%; bottom: 12%; height: 180px; display: flex; gap: 7px; padding: 16px; border-radius: 10px; background: #ddd8cf; box-shadow: 0 22px 40px rgba(0,0,0,.32); }
.radiator i { flex: 1; border-radius: 5px; background: linear-gradient(90deg,#efebe3,#b9b5ae); }
.radiator::before,.radiator::after { content: ""; position: absolute; bottom: -16px; width: 14px; height: 20px; background: #a6a29b; }
.radiator::before { left: 30px; }.radiator::after { right: 30px; }
.radiator-heat { position: absolute; left: 12%; right: 12%; bottom: 35%; height: 58%; }
.radiator-heat i { position: absolute; bottom: 0; width: 35%; height: 90%; border-radius: 50%; background: linear-gradient(to top,rgba(255,90,47,.55),transparent); filter: blur(14px); }
.radiator-heat i:nth-child(1) { left: 2%; transform: rotate(-18deg); }.radiator-heat i:nth-child(2) { left: 34%; height: 100%; }.radiator-heat i:nth-child(3) { right: 1%; transform: rotate(18deg); }
.compare-divider { position: absolute; z-index: 5; left: 50%; top: 0; bottom: 0; width: 1px; background: rgba(255,255,255,.2); }
.compare-divider span { position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%); width: 54px; height: 54px; border-radius: 50%; background: var(--paper); color: var(--ink); display: grid; place-items: center; font-size: 11px; font-weight: 900; }
.compare-person { position: absolute; z-index: 4; left: 50%; bottom: 80px; transform: translateX(-50%); width: 70px; height: 190px; }
.compare-person span { position: absolute; left: 21px; top: 0; width: 30px; height: 30px; border-radius: 50%; background: var(--paper); }
.compare-person i { position: absolute; left: 18px; top: 38px; width: 36px; height: 150px; border-radius: 20px 20px 8px 8px; background: var(--paper); }
.compare-table { border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius); overflow: hidden; }
.compare-row { min-height: 80px; display: grid; grid-template-columns: .65fr 1fr 1fr; gap: 16px; align-items: center; padding: 15px 22px; border-bottom: 1px solid rgba(255,255,255,.1); }
.compare-row:last-child { border-bottom: 0; }
.compare-row span { font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: rgba(255,255,255,.45); }
.compare-row strong { font-size: 14px; line-height: 1.35; }
.compare-row strong:first-of-type { color: var(--lime); }
.compare-row--head { background: rgba(255,255,255,.06); min-height: 60px; }
.compare-row--head strong { color: var(--paper) !important; }
.decision-note { margin: 24px 0 0; padding: 22px 25px; border-radius: 18px; background: var(--lime); color: var(--ink); }

.cost { padding-bottom: clamp(110px,10vw,170px); }
.cost-layout { display: grid; grid-template-columns: minmax(420px,.85fr) 1.15fr; gap: clamp(30px,6vw,100px); align-items: start; }
.cost-calculator { position: sticky; top: 110px; border-radius: var(--radius); background: var(--ink); color: var(--paper); padding: clamp(24px,4vw,50px); box-shadow: 0 35px 90px rgba(17,18,15,.16); }
.cost-system-toggle { display: grid; grid-template-columns: 1fr 1fr; border-radius: 18px; background: rgba(255,255,255,.08); padding: 5px; margin-bottom: 35px; }
.cost-type { border: 0; background: transparent; color: inherit; border-radius: 14px; padding: 13px; display: flex; justify-content: space-between; cursor: pointer; }
.cost-type small { color: rgba(255,255,255,.5); }
.cost-type.is-active { background: var(--paper); color: var(--ink); }
.cost-type.is-active small { color: var(--warm); }
.calc-field { display: block; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.12); }
.calc-field > span { display: flex; justify-content: space-between; gap: 20px; align-items: center; margin-bottom: 16px; }
.calc-field b { font-size: 13px; }
.calc-field output { color: var(--lime); font-size: 14px; font-weight: 800; }
.calc-field input[type="range"] { width: 100%; accent-color: var(--warm); }
.calc-field select { width: 100%; border: 1px solid rgba(255,255,255,.15); border-radius: 13px; background: #252620; color: var(--paper); padding: 13px 14px; outline: 0; }
.cost-result { margin-top: 12px; border-radius: 20px; padding: 24px; background: var(--warm); color: #fff; }
.cost-result > span { font-size: 10px; text-transform: uppercase; letter-spacing: .12em; }
.cost-result strong { display: block; margin: 12px 0 10px; font-size: clamp(31px,3.4vw,52px); line-height: 1; letter-spacing: -.055em; }
.cost-result i { display: block; font-size: 16px; font-style: normal; margin-top: 8px; letter-spacing: 0; }
.cost-result p { margin: 0; font-size: 12px; opacity: .78; }
.cost-content { display: grid; }
.cost-content article { display: grid; grid-template-columns: 70px 1fr; gap: 18px; padding: 32px 0; border-top: 1px solid var(--line); }
.cost-content article > span { color: var(--warm); font-size: 12px; font-weight: 900; letter-spacing: .12em; }
.cost-content h3 { margin: 0 0 12px; font-size: 31px; letter-spacing: -.045em; }
.cost-content p { margin: 0; color: var(--muted); }
.cost-disclaimer { margin-top: 20px; padding: 24px; border-radius: 18px; background: var(--paper-2); }
.cost-disclaimer b { font-size: 12px; text-transform: uppercase; letter-spacing: .1em; }
.cost-disclaimer p { margin: 12px 0 0; color: var(--muted); }

.installation { background: var(--paper-2); overflow: hidden; padding-bottom: 90px; }
.installation-head { padding-top: clamp(110px,12vw,180px); }
.installation-head h2 { margin: 20px 0 25px; font-size: clamp(54px,7vw,112px); line-height: .88; letter-spacing: -.075em; }
.installation-head > p:last-child { max-width: 650px; color: var(--muted); }
.installation-track-wrap { overflow: hidden; padding: 60px 0 50px; }
.installation-track { display: flex; gap: 18px; width: max-content; padding: 0 var(--pad); }
.installation-track article { width: min(430px,76vw); min-height: 520px; border-radius: 24px; background: var(--paper); border: 1px solid var(--line); padding: 25px; display: flex; flex-direction: column; }
.installation-track article > span { color: var(--warm); font-size: 11px; font-weight: 900; letter-spacing: .14em; }
.installation-track h3 { margin: auto 0 15px; font-size: 34px; line-height: 1; letter-spacing: -.05em; }
.installation-track p { margin: 0; color: var(--muted); }
.install-visual { height: 230px; margin: 20px 0 30px; position: relative; border-radius: 18px; background: #ded8cd; overflow: hidden; }
.install-plan { background-image: linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px); background-size: 28px 28px; }
.install-plan i { position: absolute; border: 2px solid var(--warm); }
.install-plan i:nth-child(1) { inset: 25px 45% 48% 25px; }.install-plan i:nth-child(2) { inset: 55% 25px 25px 35%; }.install-plan i:nth-child(3) { left: 58%; top: 25px; width: 30%; height: 30%; }.install-plan i:nth-child(4) { width: 14px; height: 14px; border-radius: 50%; background: var(--lime); left: 48%; top: 44%; }
.install-layout i { position: absolute; left: 12%; right: 12%; height: 12px; border-radius: 20px; background: var(--warm); }
.install-layout i:nth-child(1) { top: 25%; }.install-layout i:nth-child(2) { top: 48%; transform: translateX(11%); }.install-layout i:nth-child(3) { top: 71%; }
.install-base i { position: absolute; left: 7%; right: 7%; height: 28px; transform: skewY(-5deg); }
.install-base i:nth-child(1) { top: 28%; background: var(--paper); }.install-base i:nth-child(2) { top: 48%; background: var(--lime); }.install-base i:nth-child(3) { top: 68%; background: #66665f; }
.install-lay i { position: absolute; left: 10%; right: 10%; height: 10px; border: 5px solid var(--warm); border-left: 0; border-right: 0; border-radius: 999px; }
.install-lay i:nth-child(1) { top: 20%; }.install-lay i:nth-child(2) { top: 38%; }.install-lay i:nth-child(3) { top: 56%; }.install-lay i:nth-child(4) { top: 74%; }
.install-test { display: grid; place-items: center; background: var(--ink); color: var(--paper); }
.install-test b { font-size: 78px; letter-spacing: -.07em; }
.install-test::after { content: "bar"; position: absolute; left: 56%; top: 48%; font-size: 13px; color: var(--lime); }
.install-test i { position: absolute; width: 150px; height: 150px; border-radius: 50%; border: 2px dashed rgba(255,255,255,.3); animation: spin 15s linear infinite; }
.install-screed i { position: absolute; left: 8%; right: 8%; height: 62px; transform: skewY(-5deg); }
.install-screed i:first-child { top: 30%; background: #aaa398; }.install-screed i:last-child { top: 55%; background: #77736b; }
.install-finish { display: grid; grid-template-columns: repeat(3,1fr); gap: 5px; padding: 25px; transform: perspective(500px) rotateX(18deg); }
.install-finish i { background: linear-gradient(135deg,#aa8060,#6f4c34); border-radius: 4px; box-shadow: 0 0 0 1px rgba(255,255,255,.16); }
.install-start { background: var(--warm); color: #fff; display: grid; place-items: center; }
.install-start b { font-size: 67px; letter-spacing: -.08em; }
.install-start i { position: absolute; width: 150px; height: 150px; border-radius: 50%; border: 1px dashed rgba(255,255,255,.6); animation: spin 17s linear infinite reverse; }

.flooring { padding-bottom: clamp(100px,10vw,160px); }
.floor-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }
.floor-tab { border: 1px solid var(--line); border-radius: 999px; padding: 11px 15px; background: transparent; cursor: pointer; font-size: 12px; font-weight: 800; transition: .25s; }
.floor-tab.is-active { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.floor-display { display: grid; grid-template-columns: 1.1fr .9fr; min-height: 650px; border-radius: var(--radius); overflow: hidden; background: var(--paper-2); }
.floor-sample { position: relative; overflow: hidden; min-height: 650px; background: linear-gradient(160deg,#ded8ce,#bfb7ab); }
.sample-surface,.sample-adhesive,.sample-screed,.sample-insulation { position: absolute; left: 8%; right: 8%; height: 80px; transform: skewY(-8deg); box-shadow: 0 16px 30px rgba(17,18,15,.12); transition: background .35s, transform .55s; }
.sample-surface { top: 19%; background: linear-gradient(135deg,#d6d1c8 0 48%,#bdb8ae 48% 52%,#ece8e0 52%); background-size: 120px 120px; z-index: 5; }
.sample-adhesive { top: 32%; height: 35px; background: #8d8982; z-index: 4; }
.sample-screed { top: 40%; height: 115px; background: linear-gradient(135deg,#aaa398,#817b72); z-index: 3; }
.sample-cable { position: absolute; z-index: 4; left: 11%; right: 11%; top: 49%; height: 58px; border: 9px solid var(--warm); border-left: 0; border-right: 0; border-radius: 999px; transform: skewY(-8deg); box-shadow: 0 0 20px rgba(255,90,47,.6); }
.sample-insulation { top: 61%; height: 90px; background: var(--lime); z-index: 2; }
.sample-heat { position: absolute; z-index: 6; left: 14%; right: 14%; top: 4%; height: 42%; display: flex; justify-content: space-around; align-items: flex-end; }
.sample-heat i { width: 16%; height: 85%; border-radius: 50%; background: linear-gradient(to top,rgba(255,90,47,.5),transparent); filter: blur(12px); animation: breathe 2.8s ease-in-out infinite alternate; }
.floor-copy { padding: clamp(35px,6vw,80px); align-self: center; }
.floor-copy > span { color: var(--warm); font-size: 11px; text-transform: uppercase; letter-spacing: .13em; font-weight: 900; }
.floor-copy h3 { margin: 20px 0; font-size: clamp(43px,5vw,75px); line-height: .94; letter-spacing: -.065em; }
.floor-copy > p { color: var(--muted); font-size: 17px; }
.floor-copy ul { margin: 28px 0; padding: 0; list-style: none; display: grid; gap: 13px; }
.floor-copy li { padding-left: 24px; position: relative; }
.floor-copy li::before { content: "↗"; position: absolute; left: 0; color: var(--warm); }
.floor-meter { margin-top: 35px; }
.floor-meter > span { font-size: 10px; text-transform: uppercase; letter-spacing: .1em; }
.floor-meter > i { display: block; height: 7px; background: rgba(17,18,15,.12); border-radius: 10px; margin-top: 10px; overflow: hidden; }
.floor-meter b { display: block; height: 100%; width: 94%; background: linear-gradient(90deg,var(--warm),var(--amber)); border-radius: inherit; transition: width .4s; }
.floor-note { margin: 20px 0 0; padding: 20px 24px; border: 1px solid var(--line); border-radius: 16px; color: var(--muted); }
.floor-note b { color: var(--ink); }

.pros-cons { background: var(--ink); color: var(--paper); padding-bottom: clamp(110px,10vw,170px); }
.pros-cons-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.pros-panel,.cons-panel { border-radius: var(--radius); padding: clamp(26px,4vw,50px); }
.pros-panel { background: var(--lime); color: var(--ink); }
.cons-panel { background: #1c1d19; border: 1px solid rgba(255,255,255,.12); }
.panel-label { display: inline-flex; padding: 8px 12px; border-radius: 999px; font-size: 10px; letter-spacing: .12em; text-transform: uppercase; font-weight: 900; border: 1px solid currentColor; }
.pros-panel article,.cons-panel article { display: grid; grid-template-columns: 42px 1fr; gap: 15px; padding: 24px 0; border-bottom: 1px solid currentColor; border-color: rgba(17,18,15,.17); }
.cons-panel article { border-color: rgba(255,255,255,.12); }
.pros-panel article:last-child,.cons-panel article:last-child { border-bottom: 0; }
.pros-panel article > b,.cons-panel article > b { font-size: 11px; color: var(--warm); letter-spacing: .1em; }
.pros-panel h3,.cons-panel h3 { margin: 0 0 8px; font-size: 25px; letter-spacing: -.04em; }
.pros-panel p,.cons-panel p { margin: 0; opacity: .65; }

.maintenance { padding-bottom: clamp(100px,10vw,160px); }
.maintenance-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(30px,6vw,90px); align-items: start; }
.maintenance-console { position: sticky; top: 120px; min-height: 540px; border-radius: var(--radius); background: var(--ink); color: var(--paper); padding: 35px; box-shadow: 0 35px 80px rgba(17,18,15,.18); }
.console-top { display: flex; justify-content: space-between; align-items: center; font-size: 10px; letter-spacing: .14em; }
.console-top i { width: 10px; height: 10px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 15px var(--lime); }
.console-temp { display: grid; grid-template-columns: 1fr 1fr; gap: 5px 20px; margin: 55px 0; }
.console-temp small { color: rgba(255,255,255,.4); font-size: 9px; letter-spacing: .12em; }
.console-temp strong { font-size: clamp(44px,5vw,68px); letter-spacing: -.07em; }
.console-loops { display: grid; gap: 17px; }
.console-loops span { height: 8px; background: rgba(255,255,255,.1); border-radius: 10px; overflow: hidden; }
.console-loops i { display: block; height: 100%; width: var(--w); background: linear-gradient(90deg,var(--warm),var(--amber)); border-radius: inherit; }
.console-status { margin-top: 45px; padding-top: 25px; border-top: 1px solid rgba(255,255,255,.12); font-size: 12px; }
.console-status b { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--lime); margin-right: 8px; }
.maintenance-accordions { border-top: 1px solid var(--line); }
.accordion { border-bottom: 1px solid var(--line); }
.accordion button { width: 100%; border: 0; background: transparent; padding: 25px 0; display: flex; justify-content: space-between; gap: 20px; text-align: left; cursor: pointer; font-size: clamp(20px,2vw,28px); font-weight: 800; letter-spacing: -.03em; }
.accordion button b { color: var(--warm); font-size: 26px; }
.accordion-body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .35s ease; }
.accordion-body p { overflow: hidden; margin: 0; color: var(--muted); }
.accordion.is-open .accordion-body { grid-template-rows: 1fr; }
.accordion.is-open .accordion-body p { padding: 0 40px 28px 0; }

.faq { background: var(--paper-2); padding-top: clamp(110px,12vw,180px); padding-bottom: clamp(110px,12vw,180px); display: grid; grid-template-columns: .7fr 1.3fr; gap: clamp(40px,7vw,110px); }
.faq-head { position: sticky; top: 130px; align-self: start; }
.faq-head h2 { margin: 20px 0 0; font-size: clamp(48px,5.7vw,88px); line-height: .91; letter-spacing: -.07em; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item button { width: 100%; border: 0; background: transparent; padding: 25px 0; display: flex; justify-content: space-between; gap: 25px; align-items: flex-start; text-align: left; cursor: pointer; font-size: clamp(19px,2vw,28px); font-weight: 800; letter-spacing: -.035em; }
.faq-item button b { color: var(--warm); font-size: 25px; }
.faq-item > div { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .35s; }
.faq-item p { overflow: hidden; margin: 0; color: var(--muted); }
.faq-item.is-open > div { grid-template-rows: 1fr; }
.faq-item.is-open p { padding: 0 45px 28px 0; }

.marquee { overflow: hidden; background: var(--warm); color: var(--ink); padding: 25px 0; }
.marquee-track { width: max-content; display: flex; align-items: center; gap: 25px; animation: marquee 26s linear infinite; }
.marquee-track span { font-size: clamp(28px,3vw,50px); line-height: 1; font-weight: 900; letter-spacing: -.04em; }
.marquee-track i { width: 12px; height: 12px; border-radius: 50%; background: var(--ink); }
@keyframes marquee { to { transform: translateX(-50%); } }

.quote { background: var(--ink); color: var(--paper); padding-top: clamp(110px,12vw,180px); padding-bottom: clamp(110px,12vw,180px); display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(50px,8vw,140px); }
.quote-copy h2 { margin: 20px 0 32px; font-size: clamp(54px,6.6vw,104px); line-height: .89; letter-spacing: -.075em; }
.quote-copy > p:last-child { color: rgba(243,240,232,.58); max-width: 560px; }
.quote-form { min-height: 540px; border-radius: var(--radius); background: var(--paper); color: var(--ink); padding: clamp(25px,4vw,50px); position: relative; }
.form-progress { display: grid; grid-template-columns: repeat(3,1fr); gap: 5px; }
.form-progress span { height: 3px; background: rgba(17,18,15,.12); }
.form-progress span.is-active { background: var(--warm); }
.form-step { display: none; padding-top: 70px; }
.form-step.is-active { display: block; }
.question-no { color: var(--warm); font-size: 11px; font-weight: 900; letter-spacing: .1em; }
.form-step h3,.form-success h3 { margin: 16px 0 32px; font-size: clamp(34px,4vw,58px); line-height: .97; letter-spacing: -.055em; }
.option-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.option-grid input { position: absolute; opacity: 0; }
.option-grid span { display: flex; min-height: 58px; border: 1px solid var(--line); border-radius: 13px; padding: 0 16px; align-items: center; cursor: pointer; font-weight: 700; }
.option-grid input:checked + span { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.form-next,.form-submit { margin-top: 30px; border: 0; border-radius: 999px; padding: 14px 20px; background: var(--warm); color: #fff; font-weight: 800; cursor: pointer; }
.form-next span,.form-submit span { margin-left: 35px; }
.range-wrap input { width: 100%; accent-color: var(--warm); }
.range-wrap > div { display: flex; align-items: end; justify-content: space-between; margin-top: 20px; }
.range-wrap strong { font-size: 42px; letter-spacing: -.05em; }
.range-wrap > div > span { color: var(--muted); font-size: 12px; }
.form-nav { display: flex; align-items: center; justify-content: space-between; margin-top: 38px; }
.form-back { border: 0; background: transparent; padding: 0; cursor: pointer; }
.form-nav .form-next,.form-nav .form-submit { margin: 0; }
.input-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.input-grid .full { grid-column: 1/-1; }
.input-grid label { display: grid; }
.input-grid label span { font-size: 10px; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.input-grid input { width: 100%; border: 0; border-bottom: 1px solid var(--line); padding: 12px 0; background: transparent; outline: none; border-radius: 0; }
.input-grid input:focus { border-color: var(--warm); }
.form-success { display: none; height: 100%; padding-top: 75px; }
.form-success.is-active { display: block; }
.form-success > span { width: 54px; height: 54px; border-radius: 50%; display: grid; place-items: center; background: var(--warm); color: #fff; font-size: 23px; }
.form-success p { color: var(--muted); }
.form-reset { border: 1px solid var(--line); background: transparent; border-radius: 999px; padding: 12px 16px; cursor: pointer; }

.site-footer { background: #090a08; color: var(--paper); padding-top: clamp(80px,9vw,140px); padding-bottom: 26px; }
.footer-top { display: grid; grid-template-columns: .45fr 1fr auto; align-items: end; gap: 30px; padding-bottom: 70px; }
.brand--footer { align-self: start; }
.brand--footer .brand-mark { background: var(--paper); color: var(--ink); }
.footer-top h2 { margin: 0; font-size: clamp(50px,7vw,110px); line-height: .88; letter-spacing: -.075em; }
.footer-circle { width: 86px; height: 86px; border-radius: 50%; background: var(--warm); display: grid; place-items: center; color: #fff; font-size: 30px; }
.footer-columns { display: grid; grid-template-columns: repeat(4,1fr); gap: 30px; padding: 45px 0; border-top: 1px solid rgba(255,255,255,.12); border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-columns div { display: grid; align-content: start; gap: 9px; }
.footer-columns div > span { color: rgba(255,255,255,.35); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 8px; }
.footer-columns a { font-size: 13px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 25px; color: rgba(255,255,255,.42); font-size: 11px; }
.footer-bottom a { color: var(--paper); }

@media (max-width: 1180px) {
  .desktop-nav { gap: 18px; }
  .hero { grid-template-columns: 1.05fr .95fr; }
  .expand-panel { width: 88vw; }
  .component-grid { grid-template-columns: repeat(2,1fr); }
  .compare-stage { grid-template-columns: 1fr; }
  .compare-visual { min-height: 560px; }
  .cost-layout { grid-template-columns: .9fr 1.1fr; }
}

@media (max-width: 900px) {
  :root { --header-h: 72px; }
  .desktop-nav,.header-cta { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
  .menu-toggle { display: block; }
  .hero { min-height: auto; padding-top: 120px; grid-template-columns: 1fr; grid-template-rows: auto auto auto; }
  .hero h1 { font-size: clamp(65px,16vw,130px); margin-bottom: 35px; }
  .hero-bottom { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: row; align-items: center; }
  .hero-visual { width: min(88vw,650px); justify-self: center; margin: 60px 0 25px; }
  .hero-stats { grid-column: 1; }
  .scroll-expand { height: 330vh; }
  .expand-panel { width: 90vw; height: 82vh; grid-template-columns: 1fr; padding-top: 80px; }
  .expand-copy { height: 42%; }
  .expand-scene h2 { font-size: clamp(42px,9vw,72px); }
  .cutaway-visual { min-height: 46%; }
  .cutaway-visual svg { height: 100%; margin: auto; }
  .layer-label { font-size: 8px; padding: 6px 8px; }
  .layer-label b { width: 18px; height: 18px; }
  .section-heading { grid-template-columns: 1fr; gap: 26px; }
  .principle-grid { grid-template-columns: 1fr; }
  .principle-visual { position: relative; top: auto; min-height: 520px; }
  .system-panel { grid-template-columns: 1fr; position: relative; display: none; min-height: auto; }
  .system-panel.is-active { display: grid; }
  .system-stage { min-height: auto; }
  .system-illustration { min-height: 440px; }
  .cost-layout { grid-template-columns: 1fr; }
  .cost-calculator { position: relative; top: auto; }
  .floor-display { grid-template-columns: 1fr; }
  .floor-sample { min-height: 520px; }
  .pros-cons-grid { grid-template-columns: 1fr; }
  .maintenance-layout { grid-template-columns: 1fr; }
  .maintenance-console { position: relative; top: auto; min-height: 460px; }
  .faq { grid-template-columns: 1fr; }
  .faq-head { position: relative; top: auto; }
  .quote { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr auto; }
  .footer-top h2 { grid-column: 1/-1; grid-row: 2; }
  .footer-columns { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .hero { padding-top: 105px; }
  .hero h1 { font-size: clamp(60px,19vw,104px); line-height: .82; }
  .hero-line--offset { padding-left: 15px; }
  .hero-line--accent { padding-left: 0; }
  .hero-bottom { gap: 23px; }
  .hero-actions { flex-wrap: wrap; }
  .hero-visual { width: 92vw; margin-left: calc(var(--pad) * -1); margin-right: calc(var(--pad) * -1); border-radius: 42% 58% 55% 45% / 46% 43% 57% 54%; }
  .temperature-dial { width: 142px; height: 142px; }
  .temperature-dial strong { font-size: 39px; }
  .hero-chip { font-size: 9px; }
  .hero-chip--a { left: 1%; }.hero-chip--b { right: 1%; }
  .hero-stats { grid-template-columns: 1fr; }
  .hero-stats div { padding: 17px 0; }
  .hero-stats div + div { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .scroll-expand { height: 360vh; }
  .expand-panel { width: 94vw; height: 86vh; border-radius: 24px; padding: 74px 20px 30px; }
  .expand-topline { left: 20px; right: 20px; top: 23px; }
  .expand-copy { height: 50%; }
  .expand-scene h2 { font-size: clamp(36px,11vw,54px); margin-bottom: 18px; }
  .expand-scene p { font-size: 13px; }
  .scene-kicker { margin-bottom: 13px; }
  .cutaway-visual { min-height: 43%; }
  .layer-label--finish { top: 17%; }.layer-label--screed { top: 34%; }.layer-label--pipe { top: 51%; }.layer-label--insulation { bottom: 13%; }
  .section-heading { padding-top: 90px; padding-bottom: 45px; }
  .section-heading h2,.installation-head h2 { font-size: clamp(45px,14vw,72px); }
  .principle-visual { min-height: 420px; }
  .room-wall { left: 4%; right: 4%; }
  .thermostat { right: 9%; transform: scale(.82); transform-origin: top right; }
  .principle-step { grid-template-columns: 38px 1fr; padding: 23px 0; }
  .system-switch { max-width: none; }
  .system-tab { font-size: 12px; }
  .system-panel { padding: 22px; }
  .system-copy h3 { font-size: 42px; }
  .system-copy dl div { grid-template-columns: 1fr; gap: 6px; }
  .system-illustration { min-height: 340px; }
  .boiler { width: 78px; height: 105px; padding: 11px; }.manifold { width: 110px; }
  .system-decision { grid-template-columns: 1fr; }
  .component-grid { grid-template-columns: 1fr; }
  .component-card--wide { grid-column: span 1; }
  .component-card { min-height: 350px; }
  .compare-visual { min-height: 470px; }
  .compare-person { transform: translateX(-50%) scale(.75); transform-origin: bottom; }
  .radiator { left: 8%; right: 8%; height: 130px; }
  .compare-row { grid-template-columns: .65fr 1fr 1fr; padding: 13px 11px; gap: 8px; }
  .compare-row strong { font-size: 11px; }
  .compare-row span { font-size: 8px; }
  .cost-calculator { padding: 22px; }
  .cost-content article { grid-template-columns: 40px 1fr; }
  .installation-track article { width: 82vw; min-height: 490px; }
  .floor-tabs { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 8px; }
  .floor-tab { white-space: nowrap; }
  .floor-sample { min-height: 390px; }
  .sample-surface { top: 15%; }.sample-adhesive { top: 29%; }.sample-screed { top: 38%; }.sample-cable { top: 49%; }.sample-insulation { top: 64%; }
  .floor-copy { padding: 30px 22px; }
  .floor-copy h3 { font-size: 44px; }
  .pros-panel,.cons-panel { padding: 22px; }
  .maintenance-console { min-height: 390px; padding: 25px; }
  .accordion.is-open .accordion-body p,.faq-item.is-open p { padding-right: 0; }
  .quote-form { min-height: 520px; padding: 22px; }
  .form-step { padding-top: 48px; }
  .option-grid,.input-grid { grid-template-columns: 1fr; }
  .input-grid .full { grid-column: 1; }
  .footer-circle { width: 64px; height: 64px; }
  .footer-columns { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .expand-scene { opacity: 1; position: relative; transform: none; margin-bottom: 30px; }
  .scroll-expand { height: auto; padding: 20px; }
  .expand-sticky { height: auto; position: relative; }
  .expand-panel { width: 100%; height: auto; display: block; }
  .expand-copy { height: auto; }
}

/* V3.1 — hedefli hareket iyileştirmeleri */
.system-stage,
.system-switch,
.system-decision,
.component-card,
.compare-visual,
.compare-table {
  will-change: transform, opacity;
}

.system-stage {
  transform-origin: 50% 24%;
}

.component-grid {
  perspective: 1400px;
}

.component-card {
  transform-style: preserve-3d;
  isolation: isolate;
  box-shadow: 0 20px 55px rgba(17,18,15,0);
  transition: transform .38s cubic-bezier(.2,.8,.2,1), background .3s, box-shadow .38s, border-color .3s;
}

.component-card::before {
  content: "";
  position: absolute;
  inset: -35%;
  z-index: -1;
  opacity: 0;
  background: radial-gradient(circle at var(--mx, 72%) var(--my, 18%), rgba(255,90,47,.20), transparent 28%),
              radial-gradient(circle at 18% 88%, rgba(216,255,79,.20), transparent 24%);
  transform: scale(.82) rotate(-8deg);
  transition: opacity .38s, transform .55s cubic-bezier(.2,.8,.2,1);
  pointer-events: none;
}

.component-card:hover {
  transform: translateY(-10px) scale(1.012);
  background: #ebe6da;
  border-color: rgba(255,90,47,.28);
  box-shadow: 0 28px 70px rgba(17,18,15,.12);
}

.component-card:hover::before {
  opacity: 1;
  transform: scale(1) rotate(0);
}

.component-card .component-icon,
.component-card h3,
.component-card p,
.component-card small,
.component-card .component-no {
  transform: translateZ(18px);
}

.component-card .component-icon {
  transform-origin: 50% 50%;
  transition: filter .35s;
}

.component-card:hover .component-icon {
  filter: drop-shadow(0 14px 20px rgba(255,90,47,.16));
}

.compare-visual {
  transform-origin: 50% 50%;
}

.compare-side {
  will-change: clip-path, transform, filter;
}

.compare-divider {
  will-change: left, opacity, transform;
}

.compare-divider::before,
.compare-divider::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 1px;
  height: 18%;
  transform: translateX(-50%);
  background: linear-gradient(to bottom, transparent, var(--warm), transparent);
  opacity: .8;
}

.compare-divider::before { top: 10%; }
.compare-divider::after { bottom: 10%; }

.compare-side--floor::after,
.compare-side--radiator::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .68;
}

.compare-side--floor::after {
  background: radial-gradient(circle at 50% 82%, rgba(255,128,50,.28), transparent 48%);
}

.compare-side--radiator::after {
  background: radial-gradient(circle at 50% 70%, rgba(255,90,47,.24), transparent 42%);
}

.compare-row {
  position: relative;
  overflow: hidden;
  transition: background .28s, transform .28s;
}

.compare-row:not(.compare-row--head)::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(216,255,79,.08), transparent 45%, rgba(255,90,47,.07));
  transform: translateX(-105%);
  transition: transform .5s cubic-bezier(.2,.8,.2,1);
}

.compare-row:not(.compare-row--head):hover {
  background: rgba(255,255,255,.035);
  transform: translateX(5px);
}

.compare-row:not(.compare-row--head):hover::before {
  transform: translateX(0);
}

.compare-row > * {
  position: relative;
  z-index: 1;
}

@media (max-width: 760px) {
  .component-grid { perspective: none; }
  .component-card,
  .component-card:hover { transform: none; }
  .component-card::before { display: none; }
  .compare-row:not(.compare-row--head):hover { transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .component-card,
  .component-card::before,
  .compare-row,
  .compare-row::before {
    transition: none !important;
  }
}


/* V3.2 — kurumsal kimlik ve karşılaştırma tablo hizası */
.brand-copy {
  display: grid;
  gap: 2px;
  line-height: 1;
  letter-spacing: 0;
}
.brand-copy strong {
  font-size: 12px;
  line-height: 1;
  letter-spacing: .105em;
  white-space: nowrap;
}
.brand-copy small {
  font-size: 7px;
  line-height: 1.1;
  font-weight: 750;
  letter-spacing: .12em;
  opacity: .58;
  white-space: nowrap;
}

.compare-table {
  width: 100%;
  min-width: 0;
}
.compare-row {
  grid-template-columns: minmax(92px, .64fr) minmax(0, 1fr) minmax(0, 1fr);
  width: 100%;
  min-width: 0;
  transform: none;
}
.compare-row > span,
.compare-row > strong {
  display: block;
  min-width: 0;
  margin: 0;
  text-align: left;
  overflow-wrap: normal;
  word-break: normal;
  hyphens: none;
}
.compare-row:not(.compare-row--head):hover {
  transform: none;
}
.footer-bottom {
  align-items: center;
  flex-wrap: wrap;
}
.footer-bottom .design-credit b {
  color: var(--paper);
  font-weight: 750;
}

@media (max-width: 760px) {
  .brand-copy strong { font-size: 10px; }
  .brand-copy small { font-size: 6px; }
  .compare-row {
    grid-template-columns: minmax(68px, .58fr) minmax(0, 1fr) minmax(0, 1fr);
    gap: 7px;
  }
  .compare-row > strong {
    line-height: 1.4;
  }
}

/* V3.3 — ISO Mekanik Mühendislik logo uygulaması */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.brand-logo-wrap {
  position: relative;
  display: block;
  width: clamp(156px, 13vw, 206px);
  aspect-ratio: 2048 / 551;
  flex: 0 0 auto;
}

.brand-logo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: left center;
  transition: opacity .28s ease, transform .28s ease;
}

.brand-logo--dark { opacity: 1; }
.brand-logo--light { opacity: 0; }
.site-header.on-dark .brand-logo--dark { opacity: 0; }
.site-header.on-dark .brand-logo--light { opacity: 1; }

.site-header .brand:hover .brand-logo {
  transform: translateY(-1px) scale(1.015);
}

.brand--footer .brand-logo-wrap {
  width: clamp(220px, 21vw, 340px);
  aspect-ratio: 1024 / 293;
}

.brand--footer .brand-logo--light {
  opacity: 1;
}

@media (max-width: 1180px) {
  .brand-logo-wrap { width: 168px; }
}

@media (max-width: 900px) {
  .brand-logo-wrap { width: 176px; }
  .brand--footer .brand-logo-wrap { width: min(290px, 58vw); }
}

@media (max-width: 620px) {
  .brand-logo-wrap { width: 146px; }
  .brand--footer .brand-logo-wrap { width: min(250px, 68vw); }
}