/* ============================================================================
   B. JARVIS ROOFING LTD — Forte Design
   Concept: the page is a vertical section through a roof. You begin in the sky
   and descend through the build-up into the building. Light falls as you go.
   Buyer: a framework manager or main contractor comparing three contractors.
   Register: architectural practice, not builders' merchant.
   ========================================================================== */
:root{
  --sky-1:oklch(0.975 0.010 240);
  --sky-2:oklch(0.945 0.016 250);
  --paper:oklch(0.965 0.005 300);
  --ink:oklch(0.205 0.022 300);
  --ink-soft:oklch(0.42 0.018 300);
  --mute:oklch(0.58 0.014 290);
  --rule:oklch(0.885 0.008 290);
  --rule-firm:oklch(0.80 0.012 290);

  --brand:oklch(0.305 0.108 305);
  --brand-deep:oklch(0.185 0.075 305);
  --brand-lift:oklch(0.55 0.145 305);

  --brass:oklch(0.735 0.128 85);

  --disp:'Instrument Sans',ui-sans-serif,system-ui,-apple-system,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SFMono-Regular',Menlo,monospace;

  --ease:cubic-bezier(0.16,1,0.3,1);
  --max:1240px;
  --gut:clamp(22px,4.4vw,68px);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);
  font:400 17px/1.58 var(--disp);-webkit-font-smoothing:antialiased;overflow-x:clip}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
::selection{background:var(--brass);color:var(--ink)}
:focus-visible{outline:2px solid var(--brand-lift);outline-offset:3px;border-radius:2px}

h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-0.028em;line-height:0.98;
  text-wrap:balance}
.d1{font-size:clamp(2.9rem,7.4vw,6.6rem);letter-spacing:-0.038em}
.d2{font-size:clamp(2.1rem,4.6vw,3.9rem);letter-spacing:-0.032em}
.lede{font-size:clamp(1.06rem,1.35vw,1.24rem);line-height:1.55;color:var(--ink-soft);
  max-width:64ch;margin:0}
.ann{font:500 0.7rem/1 var(--mono);letter-spacing:0.2em;text-transform:uppercase;
  color:var(--brand-lift);margin:0}
.num{font-variant-numeric:tabular-nums}

.wrap{width:100%;max-width:var(--max);margin:0 auto;padding-inline:var(--gut)}
.sec{padding-block:clamp(84px,10vw,150px)}

/* section-drawing annotation rule */
.band{display:grid;gap:12px;margin-bottom:clamp(34px,4.5vw,58px)}
.band .row{display:flex;align-items:center;gap:14px}
.band .row::after{content:"";flex:1;height:1px;background:var(--rule-firm)}
.band .tick{width:9px;height:9px;border:1px solid var(--brand-lift);flex:0 0 9px;
  transform:rotate(45deg)}

/* ---------- nav ---------- */
.nav{position:fixed;inset:0 0 auto 0;z-index:80;transition:background .5s var(--ease),
  box-shadow .5s var(--ease)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:22px;
  min-height:78px}
.nav.solid{background:color-mix(in oklch,var(--paper) 88%,transparent);
  backdrop-filter:blur(14px) saturate(1.3);-webkit-backdrop-filter:blur(14px) saturate(1.3);
  box-shadow:0 1px 0 var(--rule)}
.mark{display:flex;align-items:baseline;gap:11px;line-height:1}
.mark b{font-size:1.12rem;font-weight:600;letter-spacing:-0.02em}
.mark i{font:500 0.62rem/1 var(--mono);letter-spacing:0.18em;text-transform:uppercase;
  color:var(--mute);font-style:normal}
.menu{display:flex;align-items:center;gap:34px}
.menu a{font-size:0.92rem;color:var(--ink-soft);position:relative;padding-block:4px;
  transition:color .3s var(--ease)}
.menu a:hover{color:var(--ink)}
.menu a::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:100% 50%;
  transition:transform .45s var(--ease)}
.menu a:hover::after{transform:scaleX(1);transform-origin:0 50%}
.call{font:500 0.86rem/1 var(--mono);color:var(--ink);border:1px solid var(--rule-firm);
  padding:11px 15px;border-radius:2px;transition:border-color .35s var(--ease)}
.call:hover{border-color:var(--ink)}
.call::after{display:none}
.burger{display:none;width:44px;height:44px;border:0;background:none;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:6px}
.burger i{display:block;width:22px;height:1.5px;background:var(--ink);
  transition:transform .45s var(--ease),opacity .3s}
body.nav-open .burger i:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
body.nav-open .burger i:nth-child(2){opacity:0}
body.nav-open .burger i:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
.sheet{position:fixed;inset:0;z-index:70;background:var(--brand-deep);color:var(--sky-1);
  display:flex;flex-direction:column;justify-content:center;padding:0 var(--gut);
  clip-path:inset(0 0 100% 0);transition:clip-path .8s var(--ease);visibility:hidden}
body.nav-open .sheet{clip-path:inset(0 0 0 0);visibility:visible}
.sheet a{font-size:clamp(2rem,7vw,3.4rem);font-weight:600;letter-spacing:-0.03em;
  padding-block:14px;border-bottom:1px solid color-mix(in oklch,var(--sky-1) 16%,transparent);
  opacity:0;transform:translateY(22px);
  transition:opacity .6s var(--ease) var(--d,0s),transform .6s var(--ease) var(--d,0s)}
body.nav-open .sheet a{opacity:1;transform:none}
.sheet small{display:block;margin-top:30px;font:500 0.8rem/1.6 var(--mono);
  color:color-mix(in oklch,var(--sky-1) 62%,transparent)}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;
  padding-block:150px clamp(52px,7vw,96px);overflow:hidden;
  background:linear-gradient(180deg,var(--sky-1) 0%,var(--sky-2) 58%,var(--paper) 100%)}
#stage{position:absolute;inset:0;z-index:0}
/* lets the roof pass behind the headline without eating the text */
.hero::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(100deg,
    color-mix(in oklch,var(--sky-1) 94%,transparent) 0%,
    color-mix(in oklch,var(--sky-1) 88%,transparent) 26%,
    color-mix(in oklch,var(--sky-1) 40%,transparent) 46%,
    transparent 64%)}
#stage canvas{display:block;width:100%;height:100%}
.hero .wrap{position:relative;z-index:2;width:100%}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:36px;align-items:end}
.hero h1{max-width:13ch}
.hero h1 .q{display:block;overflow:hidden}
.hero h1 .q span{display:block;transform:translateY(105%);
  transition:transform 1.05s var(--ease) var(--d,0s)}
body.ready .hero h1 .q span{transform:none}
.hero .sub{margin-top:26px;max-width:44ch;opacity:0;transform:translateY(16px);
  transition:opacity .9s var(--ease) .55s,transform .9s var(--ease) .55s}
body.ready .hero .sub{opacity:1;transform:none}
.hero-act{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px;opacity:0;
  transform:translateY(16px);transition:opacity .9s var(--ease) .7s,transform .9s var(--ease) .7s}
body.ready .hero-act{opacity:1;transform:none}
.scrollcue{writing-mode:vertical-rl;font:500 0.66rem/1 var(--mono);letter-spacing:0.24em;
  text-transform:uppercase;color:var(--mute);display:flex;align-items:center;gap:14px;
  padding-bottom:4px;opacity:0;transition:opacity .9s var(--ease) 1s}
body.ready .scrollcue{opacity:1}
.scrollcue::after{content:"";width:1px;height:64px;background:var(--rule-firm);
  animation:cue 2.8s var(--ease) infinite}
@keyframes cue{0%{transform:scaleY(0);transform-origin:50% 0}
  45%{transform:scaleY(1);transform-origin:50% 0}
  55%{transform:scaleY(1);transform-origin:50% 100%}
  100%{transform:scaleY(0);transform-origin:50% 100%}}

.btn{display:inline-flex;align-items:center;gap:11px;padding:15px 25px;border-radius:2px;
  font-size:0.95rem;font-weight:500;cursor:pointer;border:1px solid transparent;
  transition:background .4s var(--ease),color .4s var(--ease),border-color .4s var(--ease)}
.btn svg{width:15px;height:15px;transition:transform .45s var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn-solid{background:var(--ink);color:var(--sky-1)}
.btn-solid:hover{background:var(--brand)}
.btn-line{border-color:var(--rule-firm);color:var(--ink)}
.btn-line:hover{border-color:var(--ink);background:color-mix(in oklch,var(--ink) 5%,transparent)}

#fallback{position:absolute;inset:0;display:grid;place-items:center;padding:130px 6vw 0;
  pointer-events:none}
#fallback svg{width:min(50vw,520px);height:auto}
.has-gl #fallback{display:none}

/* ---------- build-up, pinned ---------- */
.buildup{background:var(--paper)}
.bu-pin{min-height:100svh;display:grid;grid-template-columns:1fr 1fr;align-items:center;
  gap:clamp(28px,5vw,80px);padding-block:118px 60px}
.bu-copy{max-width:40ch}
.bu-steps{margin-top:26px;display:grid}
.bu-step{padding:16px 0;border-top:1px solid var(--rule);opacity:.3;
  transition:opacity .55s var(--ease)}
.bu-step:last-child{border-bottom:1px solid var(--rule)}
.bu-step.on{opacity:1}
.bu-step h3{font-size:1.04rem;display:flex;align-items:baseline;gap:12px}
.bu-step h3 em{font:500 0.68rem/1 var(--mono);font-style:normal;color:var(--brand-lift);
  letter-spacing:0.14em}
.bu-step p{margin:6px 0 0;font-size:0.93rem;color:var(--mute);max-width:44ch}
.bu-visual{position:relative;aspect-ratio:1/1;max-height:76vh}
.bu-visual canvas{display:block;width:100%;height:100%}

/* ---------- systems: an index ---------- */
.systems{background:var(--brand-deep);color:var(--sky-1)}
.systems .ann{color:var(--brass)}
.systems .lede{color:color-mix(in oklch,var(--sky-1) 68%,transparent)}
.systems .band .row::after{background:color-mix(in oklch,var(--sky-1) 22%,transparent)}
.idx{border-top:1px solid color-mix(in oklch,var(--sky-1) 18%,transparent)}
.idx-row{display:grid;grid-template-columns:auto minmax(0,1fr) minmax(0,1.15fr) auto;
  gap:clamp(16px,3vw,44px);align-items:baseline;padding:clamp(22px,2.6vw,34px) 0;
  border-bottom:1px solid color-mix(in oklch,var(--sky-1) 18%,transparent);
  transition:background .5s var(--ease),padding-inline .5s var(--ease)}
.idx-row:hover{background:color-mix(in oklch,var(--sky-1) 5%,transparent);
  padding-inline:clamp(8px,1.6vw,22px)}
.idx-n{font:500 0.72rem/1 var(--mono);color:var(--brass);letter-spacing:0.1em}
.idx-row h3{font-size:clamp(1.3rem,2.5vw,2.1rem)}
.idx-row p{margin:0;font-size:0.95rem;color:color-mix(in oklch,var(--sky-1) 62%,transparent)}
.idx-tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}
.idx-tags span{font:500 0.68rem/1 var(--mono);padding:6px 9px;
  border:1px solid color-mix(in oklch,var(--sky-1) 20%,transparent);border-radius:2px;
  color:color-mix(in oklch,var(--sky-1) 76%,transparent);white-space:nowrap}

/* ---------- ledger ---------- */
.ledger{background:var(--brand);color:var(--sky-1)}
.ledger .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(18px,3vw,44px)}
.ledger dl{margin:0}
.ledger dt{font:500 0.68rem/1.4 var(--mono);letter-spacing:0.16em;text-transform:uppercase;
  color:color-mix(in oklch,var(--sky-1) 58%,transparent)}
.ledger dd{margin:12px 0 0;font-size:clamp(2.4rem,4.6vw,3.9rem);font-weight:600;
  letter-spacing:-0.04em;line-height:0.92}
.ledger dd small{font-size:0.42em;font-weight:500;margin-left:2px}

/* ---------- projects, horizontal ---------- */
.work{background:var(--paper);overflow:hidden}
.track{display:flex;gap:clamp(18px,2.4vw,34px);will-change:transform;padding-left:var(--gut)}
.card{flex:0 0 clamp(280px,31vw,430px)}
.card figure{margin:0;position:relative;overflow:hidden;background:var(--brand-deep);
  aspect-ratio:4/3;border-radius:3px}
.card img{width:100%;height:100%;object-fit:cover;transform:scale(1.04);
  transition:transform 1.3s var(--ease),filter 1s var(--ease);filter:saturate(.92)}
.card:hover img{transform:scale(1.1);filter:saturate(1)}
.card .val{position:absolute;left:14px;bottom:14px;background:var(--paper);color:var(--ink);
  font:500 1.02rem/1 var(--mono);padding:10px 13px;border-radius:2px}
.card h3{margin:18px 0 5px;font-size:1.18rem}
.card .sector{font:500 0.68rem/1 var(--mono);letter-spacing:0.16em;text-transform:uppercase;
  color:var(--brand-lift)}
.card p{margin:9px 0 0;font-size:0.93rem;color:var(--mute);max-width:40ch}
.also{margin-top:clamp(34px,4vw,60px);font-size:0.95rem;color:var(--mute);max-width:74ch}
.also b{color:var(--ink);font-weight:500}

/* ---------- assurance ---------- */
.assure{background:var(--ink);color:var(--sky-1)}
.assure .ann{color:var(--brass)}
.assure .lede{color:color-mix(in oklch,var(--sky-1) 66%,transparent)}
.assure .band .row::after{background:color-mix(in oklch,var(--sky-1) 20%,transparent)}
.a-cols{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(32px,5vw,90px);align-items:start}
.a-defs{margin:0}
.a-defs > div{display:grid;grid-template-columns:auto 1fr;gap:clamp(18px,3vw,40px);
  padding:22px 0;border-top:1px solid color-mix(in oklch,var(--sky-1) 16%,transparent)}
.a-defs > div:last-child{border-bottom:1px solid color-mix(in oklch,var(--sky-1) 16%,transparent)}
.a-defs dt{font:500 0.72rem/1.5 var(--mono);letter-spacing:0.14em;text-transform:uppercase;
  color:var(--brass);white-space:nowrap}
.a-defs dd{margin:0;color:color-mix(in oklch,var(--sky-1) 80%,transparent);font-size:0.99rem}
.creds{display:flex;flex-wrap:wrap;gap:7px;margin-top:22px}
.creds span{font:500 0.72rem/1 var(--mono);padding:9px 12px;
  border:1px solid color-mix(in oklch,var(--sky-1) 22%,transparent);border-radius:2px;
  color:color-mix(in oklch,var(--sky-1) 82%,transparent)}

/* ---------- contact ---------- */
.c-cols{display:grid;grid-template-columns:1fr 1.06fr;gap:clamp(32px,5.5vw,92px);
  align-items:start}
.c-lines{margin-top:32px;display:grid}
.c-lines a,.c-lines div{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:center;
  padding:20px 0;border-top:1px solid var(--rule);transition:padding-left .5s var(--ease)}
.c-lines div{border-bottom:1px solid var(--rule)}
.c-lines a:hover{padding-left:10px}
.c-lines em{font:500 0.66rem/1 var(--mono);font-style:normal;letter-spacing:0.16em;
  text-transform:uppercase;color:var(--mute);white-space:nowrap}
.c-lines b{font-size:1.16rem;font-weight:500;letter-spacing:-0.015em}
form{display:grid;gap:16px;border:1px solid var(--rule);border-radius:3px;
  padding:clamp(24px,3.2vw,40px);background:color-mix(in oklch,var(--sky-1) 55%,var(--paper))}
.f2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label{display:grid;gap:7px}
label span{font:500 0.66rem/1 var(--mono);letter-spacing:0.16em;text-transform:uppercase;
  color:var(--mute)}
input,select,textarea{font:400 16px/1.5 var(--disp);color:var(--ink);background:var(--paper);
  border:1px solid var(--rule-firm);border-radius:2px;padding:13px 15px;width:100%;
  transition:border-color .35s var(--ease),box-shadow .35s var(--ease)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand-lift);
  box-shadow:0 0 0 3px color-mix(in oklch,var(--brand-lift) 16%,transparent)}
textarea{min-height:116px;resize:vertical}
form .note{margin:0;font-size:0.82rem;color:var(--mute)}
.sent-msg{display:none;padding:30px;text-align:center;background:var(--brand);
  color:var(--sky-1);border-radius:3px}
form.done .sent-msg{display:block}
form.done > *:not(.sent-msg){display:none}

/* ---------- footer ---------- */
footer{background:var(--brand-deep);color:var(--sky-1);padding-block:clamp(56px,7vw,90px) 30px}
.f-cols{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:40px;
  border-bottom:1px solid color-mix(in oklch,var(--sky-1) 16%,transparent)}
footer p{margin:16px 0 0;max-width:36ch;font-size:0.95rem;
  color:color-mix(in oklch,var(--sky-1) 64%,transparent)}
footer h4{margin:0 0 15px;font:500 0.68rem/1 var(--mono);letter-spacing:0.18em;
  text-transform:uppercase;color:var(--brass)}
footer ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;font-size:0.95rem;
  color:color-mix(in oklch,var(--sky-1) 78%,transparent)}
footer a:hover{color:var(--sky-1)}
.f-end{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;
  font:500 0.74rem/1.5 var(--mono);color:color-mix(in oklch,var(--sky-1) 46%,transparent)}

[data-rv]{opacity:0;transform:translateY(26px);
  transition:opacity .95s var(--ease),transform .95s var(--ease)}
[data-rv].seen{opacity:1;transform:none}

@media (max-width:1080px){
  .bu-pin{grid-template-columns:1fr;gap:34px}
  .bu-visual{max-height:50vh;aspect-ratio:4/3;order:-1}
  .idx-row{grid-template-columns:auto 1fr;row-gap:10px}
  .idx-row p,.idx-tags{grid-column:2}
  .idx-tags{justify-content:flex-start}
  .a-cols,.c-cols{grid-template-columns:1fr}
  .ledger .wrap{grid-template-columns:1fr 1fr;row-gap:34px}
  .f-cols{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .menu{display:none}
  .burger{display:flex}
  .hero-grid{grid-template-columns:1fr}
  .scrollcue{display:none}
  .f2{grid-template-columns:1fr}
  .f-cols{grid-template-columns:1fr}
  .ledger .wrap{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;
    transition-duration:.01ms!important;scroll-behavior:auto!important}
  [data-rv]{opacity:1;transform:none}
  .hero h1 .q span{transform:none}
  .hero .sub,.hero-act,.scrollcue{opacity:1;transform:none}
}