:root{
  --ink:#16191B;
  --text:#1D2124;
  --muted:#5B6268;
  --soft:#9AA3AA;
  --stone:#F1F3F4;
  --line:#DDE2E5;
  --dark:#0B1014;
  --accent:#0B4FB3;
  --accent-soft:#A8C3E8;
  --sky:#1DA6E3;
  --heat:#E39A3B;
  --wrap:1280px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:#fff;color:var(--text);font-family:Inter,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;font-optical-sizing:auto;font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.wrap{width:min(var(--wrap),100% - 64px);margin-inline:auto}
.skip{position:absolute;left:-9999px;top:8px;background:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:8px}

/* Type: GSE family system, Breeze blue */
h1,h2,h3{font-weight:400;margin:0;color:inherit}
h1{font-size:clamp(40px,5.4vw,76px);line-height:1.02;letter-spacing:-.045em;max-width:15ch}
h2{font-size:clamp(32px,3.5vw,48px);line-height:1.04;letter-spacing:-.034em}
h3{font-size:20px;line-height:1.25;letter-spacing:-.018em}
p{margin:0}
.over{font-size:13px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:22px}
.over-light{color:rgba(255,255,255,.82)}
.over-soft{color:var(--accent-soft)}

/* Buttons: square, quiet */
.btn{display:inline-flex;align-items:center;gap:14px;height:50px;padding:0 20px;font:inherit;font-size:14px;font-weight:500;text-decoration:none;border:0;border-radius:0;cursor:pointer;white-space:nowrap;transition:background .15s ease,color .15s ease}
.btn span{font-size:15px}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#093f8f}
.btn-light{background:#F4F6F7;color:var(--ink)}
.btn-light:hover{background:#fff}
.btn-ghost-light{color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.35);margin-top:28px}
.btn-ghost-light:hover{background:#fff;color:var(--ink)}
.btn-full{width:100%;justify-content:space-between}
.link-light{color:#fff;font-size:14px;font-weight:500;text-decoration:none;padding:14px 2px;border-bottom:1px solid rgba(255,255,255,.5);display:inline-flex;gap:14px}

/* Header: always solid, like GSE */
.top{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.top-row{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand img{height:30px;width:auto}
.nav{display:flex;align-items:center;gap:34px}
.nav a{text-decoration:none;font-size:14px;font-weight:500;color:var(--text)}
.nav a:not(.btn):hover{color:var(--accent)}
.nav .nav-cta{color:#fff;height:42px}
.menu{display:none;align-items:center;gap:10px;background:none;border:0;font:inherit;font-size:15px;font-weight:500;color:var(--ink);cursor:pointer;padding:8px 0}
.bars{display:grid;gap:5px}
.bars span{display:block;width:18px;height:1.5px;background:var(--ink);transition:transform .2s}
.menu[aria-expanded="true"] .bars span:first-child{transform:translateY(3.25px) rotate(45deg)}
.menu[aria-expanded="true"] .bars span:last-child{transform:translateY(-3.25px) rotate(-45deg)}

/* Hero */
.hero{position:relative;min-height:calc(100svh - 72px);max-height:900px;display:flex;align-items:flex-end;color:#fff;overflow:hidden;background:var(--dark)}
.hero-photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:50% 60%}
.hero-shade{position:absolute;inset:0;background:linear-gradient(0deg,rgba(11,16,20,.86) 0%,rgba(11,16,20,.45) 45%,rgba(11,16,20,.25) 100%)}
.hero-inner{position:relative;padding:0 0 64px}
.hero-sub{font-size:18px;color:rgba(255,255,255,.86);margin-top:26px;max-width:46ch}
.actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px 30px;margin-top:38px}

/* Stats */
.stats{border-bottom:1px solid var(--line)}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr)}
.stats-row>div{padding:34px 28px 36px 0}
.stats-row>div+div{padding-left:28px;border-left:1px solid var(--line)}
.num{font-size:clamp(34px,3.4vw,46px);font-weight:300;letter-spacing:-.04em;line-height:1;color:var(--ink);margin-bottom:12px}
.num span{font-size:15px;font-weight:500;letter-spacing:0;color:var(--accent);margin-left:6px}
.stats-row p:not(.num){font-size:14px;color:var(--muted);max-width:22ch}

/* Section blocks */
.block{padding:clamp(88px,10vw,136px) 0}
.block-stone{background:var(--stone)}
.head{display:grid;grid-template-columns:1.1fr .9fr;gap:40px 64px;align-items:end;margin-bottom:clamp(44px,5vw,64px)}
.head-note{font-size:18px;line-height:1.5;color:var(--muted)}

/* Fleet */
.fleet-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,72px);align-items:stretch}
.spec{border-top:1px solid var(--ink);align-self:center}
.spec-row{display:grid;grid-template-columns:1fr 96px;gap:4px 20px;padding:24px 0;border-bottom:1px solid var(--line)}
.spec-k{font-size:18px;letter-spacing:-.01em;color:var(--ink)}
.spec-v{grid-row:span 2;font-size:40px;font-weight:300;letter-spacing:-.04em;line-height:1;text-align:right;color:var(--accent)}
.spec-d{font-size:14px;color:var(--muted)}
.spec-v small{font-size:15px;font-weight:500;letter-spacing:0;margin-left:4px}
.spec-total .spec-k{font-weight:500}
.spec-note{font-size:13px;color:var(--soft);margin-top:18px}

/* Work cards */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:56px 32px}
.card-lg{grid-column:1/-1}
.card-img{overflow:hidden;background:#E3E8EB;margin-bottom:20px}
.card-img img{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;transition:transform .8s cubic-bezier(.2,.7,.2,1)}
.card-lg .card-img img{aspect-ratio:21/9}
.card:hover .card-img img{transform:scale(1.03)}
.card-label{font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:10px}
.card h3{font-size:clamp(22px,2vw,28px);letter-spacing:-.025em}
.card-text{color:var(--muted);margin-top:8px}

/* Process */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--ink)}
.steps li{padding:24px 24px 0 0}
.steps li+li{padding-left:24px;border-left:1px solid var(--line)}
.steps span{display:block;font-size:13px;font-weight:500;letter-spacing:.14em;color:var(--accent);margin-bottom:28px}
.steps h3{margin-bottom:8px}
.steps p{font-size:14px;color:var(--muted)}
/* Product study (dark panel, same renderer as the cooling study) */
.product{margin:0;position:relative;min-height:540px;background:radial-gradient(80% 70% at 50% 45%,#1A2229 0%,#10161B 55%,#0B1014 100%);overflow:hidden}
#unitsCanvas{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:grab;touch-action:pan-y}
#unitsCanvas:active{cursor:grabbing}
.product figcaption{position:absolute;left:24px;right:24px;top:22px;pointer-events:none;color:#fff}
.product figcaption .over{margin-bottom:0}

.product figcaption ul{list-style:none;padding:0;position:static;display:flex;gap:22px;margin-top:10px;font-size:13px;color:#9BA6AE}
.product figcaption ul span{color:#fff;font-weight:500;margin-right:4px}
.product--static{background:url(/assets/work/weddinghall.jpg) center/cover}

/* Cooling study: scroll-pinned, ported from the GSE build section */
.build{--b-ink:#F1F4F6;--b-muted:#A3AEB6;--b-faint:#6C7880;--b-line:rgba(241,244,246,.14);--b-accent:#8FB6F0;position:relative;height:340vh;color:var(--b-ink);background:#0B1014}
.build__stage{position:sticky;top:72px;height:calc(100svh - 72px);min-height:560px;overflow:hidden;isolation:isolate;background:radial-gradient(85% 70% at 64% 58%,#19222A 0%,#11181E 48%,#0B1014 100%)}
.build__canvas,.build__fallback{position:absolute;inset:0;width:100%;height:100%;z-index:-1}
.build__fallback{object-fit:cover;opacity:0;display:none}
.build--static .build__canvas{display:none}
.build--static .build__fallback{display:block;opacity:.45}
.build__dim{position:absolute;top:0;left:0;z-index:1;padding:5px 9px;border:1px solid rgba(143,182,240,.55);background:rgba(11,16,20,.72);color:var(--b-accent);font:500 11px/1 Inter,system-ui,sans-serif;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap;opacity:0;pointer-events:none}
.build__overlay{position:relative;z-index:2;height:100%;display:grid;grid-template-rows:auto 1fr auto;padding-block:clamp(36px,6vh,72px) clamp(28px,4.5vh,48px);pointer-events:none}
.build__head h2{max-width:15ch;font-size:clamp(34px,3.3vw,52px);font-weight:300;line-height:1.02;letter-spacing:-.035em}
.build__steps{align-self:center;width:min(380px,34vw);margin:0;padding:0;list-style:none}
.build__step{position:relative;display:grid;grid-template-columns:34px 1fr;padding:11px 0 12px;border-top:1px solid var(--b-line)}
.build__step:last-child{border-bottom:1px solid var(--b-line)}
.build__num{padding-top:4px;color:var(--b-faint);font-size:11px;letter-spacing:.06em;font-variant-numeric:tabular-nums;transition:color .4s}
.build__step h3{color:var(--b-muted);font-size:18px;transition:color .4s}
.build__step p{max-width:34ch;color:var(--b-muted);font-size:14px;line-height:1.55;overflow:hidden;opacity:0;max-height:0;transition:max-height .45s ease,opacity .35s ease,margin .45s ease}
.build__step.is-done h3{color:#CDD5DA}
.build__step.is-done .build__num,.build__step.is-active .build__num{color:var(--b-accent)}
.build__step.is-active h3{color:var(--b-ink)}
.build__step.is-active p{max-height:6em;margin-top:8px;opacity:1}
.build__bar{position:absolute;left:0;right:0;top:-1px;height:1px;overflow:hidden}
.build__bar>span{display:block;height:100%;background:var(--b-accent);transform-origin:left center;transform:scaleX(0)}
.build__foot{display:flex;align-items:flex-end;justify-content:space-between;gap:40px}
.build__readout{display:grid;grid-template-columns:repeat(4,auto);gap:0 34px;margin:0}
.build__readout dt{margin-bottom:6px;color:var(--b-faint);font-size:11px;letter-spacing:.1em;text-transform:uppercase}
.build__readout dd{margin:0;font-size:clamp(22px,2vw,30px);font-weight:300;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.build__note{max-width:330px;text-align:right;color:var(--b-faint);font-size:11px;line-height:1.55}
.build--static{height:auto}
.build--static .build__stage{position:relative;top:0;height:auto;min-height:760px}
.build--static .build__step p{max-height:6em;margin-top:8px;opacity:1}
@media (prefers-reduced-motion:reduce){.build{height:auto}.build__stage{position:relative;top:0;height:100svh;max-height:900px}}

/* Dark GSE band */
.dark{background:var(--dark);color:#fff;padding:clamp(88px,10vw,128px) 0}
.dark-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px 64px;align-items:end}
.dark-side p{font-size:17px;line-height:1.6;color:#B8C0C6;max-width:46ch}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px 64px}
.qa{border-top:1px solid var(--ink)}
.qa details{border-bottom:1px solid var(--line)}
.qa summary{list-style:none;cursor:pointer;padding:22px 40px 22px 0;font-size:18px;letter-spacing:-.01em;position:relative}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);font-size:22px;font-weight:300;color:var(--accent);transition:transform .2s}
.qa details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.qa details p{color:var(--muted);padding:0 40px 22px 0}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px 64px;align-items:start}
.reach{margin:44px 0 0;display:grid;gap:22px;border-top:1px solid var(--line);padding-top:26px}
.reach dt{font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--soft)}
.reach dd{margin:6px 0 0;font-size:20px;letter-spacing:-.015em}
.reach a{text-decoration:none}
.reach a:hover{color:var(--accent)}
.enquiry{background:#fff;padding:clamp(24px,3vw,40px);display:grid;gap:18px}
.enquiry .row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.enquiry label{display:grid;gap:8px;font-size:13px;font-weight:500;color:var(--muted)}
.enquiry input,.enquiry select{width:100%;font:inherit;font-size:16px;color:var(--ink);background:transparent;border:0;border-bottom:1px solid #C5CCD1;border-radius:0;padding:10px 0;min-height:44px}
.enquiry input:focus,.enquiry select:focus{outline:none;border-bottom-color:var(--accent)}
.enquiry .btn{margin-top:14px}

/* Footer */
.foot{background:var(--dark);color:#8C969D;padding:44px 0 48px;font-size:14px}
.foot-row{display:flex;flex-wrap:wrap;align-items:center;gap:20px 40px}
.foot img{height:26px;width:auto;background:#fff;padding:6px 10px;box-sizing:content-box}
.foot nav{display:flex;flex-wrap:wrap;gap:8px 26px}
.foot nav a{text-decoration:none;color:#C8CFD4}
.foot nav a:hover{color:#fff}
.foot .copy{margin-left:auto}

.float-wa{position:fixed;right:22px;bottom:22px;z-index:60;width:56px;height:56px;border-radius:50%;display:grid;place-items:center;background:var(--accent);color:#fff;box-shadow:0 10px 30px rgba(11,16,20,.25)}
.float-wa:hover{background:#093f8f}

@media (max-width:1000px){
  .wrap{width:calc(100% - 48px)}
  .nav{position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:#fff;padding:8px 24px 24px;border-bottom:1px solid var(--line);display:none}
  .nav.open{display:flex}
  .nav a{padding:16px 0;font-size:18px;border-bottom:1px solid var(--line)}
  .nav .nav-cta{margin-top:16px;justify-content:space-between;border:0;height:52px;padding:0 20px}
  .menu{display:flex}
  .stats-row{grid-template-columns:1fr 1fr}
  .stats-row>div:nth-child(3){padding-left:0;border-left:0}
  .stats-row>div:nth-child(n+3){border-top:1px solid var(--line)}
  .head,.fleet-grid,.dark-grid,.faq-grid,.contact-grid{grid-template-columns:1fr}
    .steps{grid-template-columns:1fr 1fr;gap:0}
  .steps li,.steps li+li{padding:24px 20px 28px 0;border-left:0;border-bottom:1px solid var(--line)}
  .steps li:nth-child(even){padding-left:20px;border-left:1px solid var(--line)}
  }
@media (max-width:999px){
  .build{height:300vh}
  .build__stage{min-height:520px}
  .build__overlay{padding-block:28px 20px}
  .build__head h2{font-size:clamp(30px,8vw,44px)}
  .build__steps{align-self:end;width:100%}
  .build__step{display:none;padding:16px 0 4px;border:0}
  .build__step:last-child{border-bottom:0}
  .build__step.is-active{display:grid}
  .build__bar{background:var(--b-line)}
  .build__foot{display:block;margin-top:12px}
  .build__readout{display:none}
  .build__note{text-align:left;max-width:none;font-size:10px}
  .build--static .build__step{display:grid}
  .product{min-height:440px}
}
@media (max-width:640px){
  .build__stage{top:64px;height:calc(100svh - 64px)}
  body{font-size:15px}
  .wrap{width:calc(100% - 40px)}
  .top-row{height:64px}.nav{top:64px}
  .brand img{height:24px}
  .hero{min-height:calc(100svh - 64px)}
  .hero-photo{object-position:60% 50%}
  .hero-inner{padding-bottom:40px}
  .hero-sub{font-size:16px}
  .stats-row>div{padding:24px 14px 26px 0}
  .stats-row>div+div{padding-left:14px}
  .stats-row>div:nth-child(3){padding-left:0}
  .cards{grid-template-columns:1fr;gap:44px}
  .card-lg .card-img img{aspect-ratio:3/2}
  .steps{grid-template-columns:1fr}
  .steps li:nth-child(even){padding-left:0;border-left:0}
  .enquiry .row{grid-template-columns:1fr}
  .head-note{font-size:16px}
  .foot .copy{margin-left:0}
  .float-wa{right:16px;bottom:16px}
}