/* ==========================================================================
   HALDANE, CABINET & COIL
   World: the workshop drawing sheet. Grey-green drawing paper, graphite ink,
   non-repro dimension blue, revision red. One easing curve, --e, an instrument
   settle with a long tail and no overshoot.
   ========================================================================== */

@font-face{font-family:Anybody;src:url(/fonts/anybody-var.woff2)format("woff2");font-weight:300 900;font-stretch:75% 125%;font-display:swap;font-style:normal}
@font-face{font-family:Archivo;src:url(/fonts/archivo-var.woff2)format("woff2");font-weight:400 700;font-display:swap;font-style:normal}
@font-face{font-family:MartianMono;src:url(/fonts/martianmono-var.woff2)format("woff2");font-weight:400 700;font-display:swap;font-style:normal}

:root{
  --sheet:#c9cfc9;          /* drawing paper */
  --sheet-2:#bfc7c0;        /* drawing field */
  --sheet-3:#b3bcb4;        /* recessed */
  --paper:#eceee8;          /* title block, highlight */
  --ink:#141a16;            /* graphite */
  --ink-2:#3b433c;          /* secondary prose */
  --ink-3:#49514a;          /* tertiary; 5.0:1 on --sheet so it clears AA at 10px */
  --blue:#1b44c8;           /* non-repro dimension blue */
  --blue-d:#152f8a;
  --red:#a52413;            /* revision red */
  --red-b:#c22a16;
  --fd:Anybody,"Arial Narrow",sans-serif;
  --fb:Archivo,system-ui,sans-serif;
  --fm:MartianMono,ui-monospace,monospace;
  --e:cubic-bezier(.33,.02,0,1);
  --gut:clamp(1.15rem,4.6vw,3.25rem);
  --rule:1px solid var(--ink-3);
  --maxw:1560px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--sheet);color:var(--ink);
  font-family:var(--fb);font-size:1rem;line-height:1.62;
  font-synthesis-weight:none;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{max-width:100%}
svg{display:block}
h1,h2,h3{margin:0;font-weight:600;text-wrap:balance}
p{margin:0}
ul,ol,dl,dd{margin:0;padding:0}
li{list-style:none}
a{color:inherit}
button,input,select{font:inherit;color:inherit}

/* --- focus ------------------------------------------------------------- */
:where(a,button,input,[tabindex]):focus-visible{
  outline:2.5px solid var(--blue);outline-offset:3px;border-radius:1px;
}
.skip{
  position:fixed;top:.5rem;left:.5rem;z-index:120;padding:.7rem 1rem;
  background:var(--ink);color:var(--paper);font:600 .8rem/1 var(--fb);
  text-decoration:none;transform:translateY(-160%);transition:transform .25s var(--e);
}
.skip:focus{transform:none}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}

/* --- sheet border, desktop only ---------------------------------------- */
.frame{display:none}
@media (min-width:1100px){
  .frame{
    display:block;position:fixed;inset:14px;pointer-events:none;z-index:60;
    border:1px solid color-mix(in srgb,var(--ink) 34%,transparent);
  }
  .frame::before{
    content:"";position:absolute;inset:6px;
    border:1px solid color-mix(in srgb,var(--ink) 14%,transparent);
  }
  .frame__z{
    position:absolute;top:2px;font:500 .58rem/1 var(--fm);letter-spacing:.14em;
    color:color-mix(in srgb,var(--ink) 46%,transparent);
  }
  .frame__z--a{left:12.5%}.frame__z--b{left:37.5%}
  .frame__z--c{left:62.5%}.frame__z--d{left:87.5%}
}

/* --- masthead ---------------------------------------------------------- */
.mast{
  position:sticky;top:0;z-index:70;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.7rem var(--gut);
  background:color-mix(in srgb,var(--sheet) 90%,transparent);
  backdrop-filter:blur(9px);
  border-bottom:1px solid color-mix(in srgb,var(--ink) 20%,transparent);
}
.mark{display:flex;align-items:baseline;gap:.55rem;text-decoration:none}
.mark__name{
  font-family:var(--fd);font-weight:800;font-stretch:112%;
  font-size:1.02rem;letter-spacing:.11em;text-transform:uppercase;
}
.mark__desc{
  font-family:var(--fm);font-size:.56rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-3);
}
.mast__nav{display:flex;gap:1.15rem;align-items:center}
.mast__nav a{
  font-family:var(--fm);font-size:.63rem;letter-spacing:.1em;text-transform:uppercase;
  text-decoration:none;color:var(--ink-2);
  padding:.35rem 0;border-bottom:1px solid transparent;
  transition:color .2s var(--e),border-color .2s var(--e);
}
.mast__nav a:hover{color:var(--ink);border-bottom-color:var(--blue)}
.mast__nav a:not(.mast__order){display:none}
.mast__order{
  color:var(--blue) !important;border:1px solid var(--blue);
  padding:.42rem .8rem !important;
}
.mast__order:hover{background:var(--blue);color:var(--paper) !important}
@media (min-width:860px){.mast__nav a:not(.mast__order){display:inline-block}}

/* --- shared section shell ---------------------------------------------- */
.sheet{padding:clamp(3.2rem,9vw,6.5rem) var(--gut);position:relative;scroll-margin-top:60px}
.sheet + .sheet{border-top:1px solid color-mix(in srgb,var(--ink) 20%,transparent)}
.sheet h2{
  font-family:var(--fd);font-weight:700;font-stretch:105%;
  font-size:clamp(1.72rem,5.3vw,3.35rem);line-height:1.03;letter-spacing:-.028em;
}
.sheet h3{
  font-family:var(--fd);font-weight:700;font-stretch:96%;
  font-size:1.02rem;letter-spacing:.005em;
}
.lead{font-size:1.06rem;line-height:1.55}
@media (min-width:900px){.lead{font-size:1.2rem}}

/* reveal: JS adds .r then .in, so no-JS keeps everything visible */
.r{opacity:0;transform:translate3d(0,18px,0)}
.r.in{opacity:1;transform:none;transition:opacity .72s var(--e),transform .72s var(--e)}
@media (prefers-reduced-motion:reduce){
  .r{opacity:1 !important;transform:none !important}
  .r.in{transition:none}
  *{scroll-behavior:auto !important}
}
html{scroll-behavior:smooth}

/* ==========================================================================
   SHEET 1 : GENERAL ARRANGEMENT
   ========================================================================== */
.ga{padding-top:clamp(1.6rem,3.4vw,2.3rem)}
.ga__head{display:grid;gap:1rem;margin-bottom:clamp(1.3rem,2.6vw,1.7rem)}
.ga__title{
  font-family:var(--fd);font-weight:800;font-stretch:108%;
  font-size:clamp(2rem,5.4vw,3.7rem);line-height:.93;letter-spacing:-.036em;
  text-wrap:balance;max-width:24ch;
}
.ga__lede{max-width:44ch;color:var(--ink-2);font-size:1.02rem}
@media (min-width:900px){
  .ga__head{grid-template-columns:1.55fr 1fr;gap:2.5rem;align-items:end}
  .ga__lede{font-size:1.04rem;padding-bottom:.3rem}
}

.ga__body{display:grid;gap:1.1rem}
@media (min-width:1100px){
  .ga__body{grid-template-columns:minmax(0,1fr) 336px;align-items:start;gap:1.15rem}
}

/* ---------- drawing field ---------- */
.field{
  background:var(--sheet-2);border:1px solid var(--ink);
  display:flex;flex-direction:column;min-width:0;
}
.field__bar{
  display:flex;align-items:center;justify-content:space-between;gap:.75rem;
  padding:.5rem .7rem;border-bottom:1px solid color-mix(in srgb,var(--ink) 34%,transparent);
}
.viewtog{display:flex;border:1px solid var(--ink)}
.viewtog__b{
  appearance:none;background:none;border:0;cursor:pointer;
  padding:.42rem .7rem;font:500 .6rem/1 var(--fm);letter-spacing:.11em;text-transform:uppercase;
  color:var(--ink-2);transition:background .22s var(--e),color .22s var(--e);white-space:nowrap;
}
.viewtog__b + .viewtog__b{border-left:1px solid var(--ink)}
.viewtog__b:hover{background:color-mix(in srgb,var(--ink) 8%,transparent)}
.viewtog__b.is-on{background:var(--ink);color:var(--paper)}
.field__scale{font:400 .58rem/1.3 var(--fm);letter-spacing:.06em;color:var(--ink-3);text-align:right}
.field__stage{position:relative;flex:1;min-height:min(74vw,330px)}
@media (min-width:640px){.field__stage{min-height:400px}}
@media (min-width:1100px){.field__stage{min-height:clamp(330px,44vh,430px)}}
.elev{width:100%;height:100%;position:absolute;inset:0}
.elev.is-off{display:none}

/* the authored moment: the sheet draws itself once, in drawing order */
.elev.is-draw .dw{stroke-dasharray:1;stroke-dashoffset:1;animation:draw .78s var(--e) forwards}
.elev.is-draw .e-arrow,.elev.is-draw text{animation:ink .5s var(--e) .85s both}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes ink{from{opacity:0}to{opacity:1}}
@media (prefers-reduced-motion:reduce){
  .elev.is-draw .dw,.elev.is-draw .e-arrow,.elev.is-draw text{animation:none;stroke-dashoffset:0}
}

/* live elevation drawing primitives (injected by app.js) */
.e-out{fill:none;stroke:var(--ink);stroke-width:1.7}
.e-in{fill:none;stroke:var(--ink-3);stroke-width:.9;stroke-dasharray:5 3 1.5 3}
.e-fill{fill:color-mix(in srgb,var(--paper) 58%,transparent);stroke:none}
.e-drv{fill:none;stroke:var(--ink);stroke-width:1.35}
.e-drv-f{fill:color-mix(in srgb,var(--ink) 12%,transparent);stroke:var(--ink);stroke-width:1.35}
.e-dim{fill:none;stroke:var(--blue);stroke-width:1}
.e-wit{fill:none;stroke:var(--blue);stroke-width:.8;opacity:.75}
.e-arrow{fill:var(--blue);stroke:none}
.e-txt{fill:var(--blue);font:500 11px/1 var(--fm);letter-spacing:.02em}
.e-txt-s{fill:var(--ink-3);font:400 9.5px/1 var(--fm);letter-spacing:.05em}
.e-cl{stroke:var(--red);stroke-width:.8;stroke-dasharray:7 3 1.5 3;fill:none}
.e-hatch{fill:none;stroke:var(--ink-3);stroke-width:.65;opacity:.5}
.e-port{fill:var(--sheet-3);stroke:var(--ink);stroke-width:1.2}

/* ---------- 3D view ---------- */
.iso{position:absolute;inset:0}
.iso[hidden]{display:none}
#glc{width:100%;height:100%;display:block;touch-action:none;cursor:grab}
#glc:active{cursor:grabbing}
.dims{position:absolute;inset:0;pointer-events:none;width:100%;height:100%}
.d-line{fill:none;stroke:var(--blue);stroke-width:1}
.d-wit{fill:none;stroke:var(--blue);stroke-width:.75;opacity:.7}
.d-arrow{fill:var(--blue)}
.d-txt{fill:var(--blue);font:500 11px/1 var(--fm);paint-order:stroke;stroke:var(--sheet-2);stroke-width:3.5px;stroke-linejoin:round}
.iso__hint{
  position:absolute;left:.7rem;bottom:.6rem;margin:0;
  font:400 .58rem/1 var(--fm);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);
  transition:opacity .4s var(--e);
}
.iso__hint.is-gone{opacity:0}
.iso__load{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:.6rem;
  font:400 .62rem/1 var(--fm);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);
  background:var(--sheet-2);
}
.iso__load[hidden]{display:none}
.iso__load span{
  width:9px;height:9px;border:1.5px solid var(--blue);border-right-color:transparent;
  border-radius:50%;animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(1turn)}}
@media (prefers-reduced-motion:reduce){.iso__load span{animation-duration:2.4s}}

/* ---------- control rail ---------- */
.rail{
  border:1px solid var(--ink);background:color-mix(in srgb,var(--paper) 42%,transparent);
  padding:.35rem 0 0;min-width:0;
}
@media (min-width:1100px){
  .rail{position:sticky;top:60px;max-height:calc(100vh - 76px);overflow-y:auto;overscroll-behavior:contain}
}
.rail__set{border:0;margin:0;padding:.85rem .9rem}
.rail__set + .rail__set{border-top:1px solid color-mix(in srgb,var(--ink) 22%,transparent)}
.rail__set legend{
  padding:0 0 .5rem;font:500 .58rem/1 var(--fm);letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-3);
}
.chips{display:grid;gap:.3rem}
.chips--2{grid-template-columns:1fr 1fr}
.chips--3{grid-template-columns:repeat(3,1fr)}
.chip{position:relative;display:block;cursor:pointer;min-width:0}
.chip input{position:absolute;opacity:0;width:1px;height:1px}
.chip__t,.chip__s{display:block;text-align:center;pointer-events:none}
.chip__t{
  font-family:var(--fd);font-weight:700;font-stretch:92%;font-size:.86rem;line-height:1.15;
  letter-spacing:.005em;
}
.chip__s{font:400 .53rem/1.3 var(--fm);letter-spacing:.04em;color:var(--ink-3);margin-top:.1rem}
.chip::before{
  content:"";position:absolute;inset:0;border:1px solid color-mix(in srgb,var(--ink) 30%,transparent);
  transition:background .22s var(--e),border-color .22s var(--e);
}
.chip{padding:.5rem .3rem .45rem}
.chip:hover::before{border-color:var(--ink);background:color-mix(in srgb,var(--ink) 6%,transparent)}
.chip:has(input:checked)::before{border-color:var(--blue);border-width:1.5px;background:color-mix(in srgb,var(--blue) 10%,transparent)}
.chip:has(input:checked) .chip__t{color:var(--blue-d)}
.chip:has(input:focus-visible)::before{outline:2.5px solid var(--blue);outline-offset:2px}
.chip__t,.chip__s{position:relative}

/* dimension sliders */
.rail__set--dims{padding-bottom:.7rem}
.dimrow{
  display:grid;grid-template-columns:4.1rem 1fr auto auto;align-items:center;
  gap:.45rem;padding:.28rem 0;
}
.dimrow label{font:400 .68rem/1 var(--fb);color:var(--ink-2)}
.dimrow output{font:600 .82rem/1 var(--fm);text-align:right;min-width:2.9rem;color:var(--ink)}
.dimrow__u{font:400 .56rem/1 var(--fm);color:var(--ink-3)}
input[type=range]{
  appearance:none;-webkit-appearance:none;background:none;width:100%;height:22px;margin:0;cursor:ew-resize;
}
input[type=range]::-webkit-slider-runnable-track{
  height:1px;background:var(--ink-3);
}
input[type=range]::-moz-range-track{height:1px;background:var(--ink-3)}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:13px;height:19px;margin-top:-9px;
  background:var(--blue);border:0;border-radius:1px;
  transition:transform .18s var(--e);
}
input[type=range]::-moz-range-thumb{
  width:13px;height:19px;background:var(--blue);border:0;border-radius:1px;
}
input[type=range]:hover::-webkit-slider-thumb{transform:scaleY(1.14)}
input[type=range]:focus-visible{outline:none}
input[type=range]:focus-visible::-webkit-slider-thumb{outline:2.5px solid var(--blue);outline-offset:2px}
input[type=range]:focus-visible::-moz-range-thumb{outline:2.5px solid var(--blue);outline-offset:2px}
.rail__hint{font:400 .64rem/1.5 var(--fb);color:var(--ink-3);margin-top:.5rem}

/* finish swatches */
.swatches{display:grid;gap:.22rem}
.sw{display:flex;align-items:center;gap:.6rem;cursor:pointer;padding:.3rem .35rem;position:relative}
.sw input{position:absolute;opacity:0;width:1px;height:1px}
.sw__c{
  width:34px;height:22px;flex:0 0 auto;border:1px solid color-mix(in srgb,var(--ink) 45%,transparent);
  position:relative;
}
.sw__t{font:400 .72rem/1.2 var(--fb);color:var(--ink-2)}
.sw::before{
  content:"";position:absolute;inset:0;border:1px solid transparent;transition:border-color .2s var(--e),background .2s var(--e);
}
.sw:hover::before{background:color-mix(in srgb,var(--ink) 6%,transparent)}
.sw:has(input:checked)::before{border-color:var(--blue)}
.sw:has(input:checked) .sw__t{color:var(--ink);font-weight:600}
.sw:has(input:focus-visible)::before{outline:2.5px solid var(--blue);outline-offset:2px}
.sw__c,.sw__t{position:relative}
[data-sw=ply]{background:
  repeating-linear-gradient(90deg,#e5d9be 0 2px,#d8c9a8 2px 3px,#e9dfc6 3px 5px,#d2c29e 5px 6px)}
[data-sw=ash]{background:
  repeating-linear-gradient(74deg,#22201f 0 3px,#161514 3px 4px,#2a2726 4px 7px)}
[data-sw=oak]{background:
  repeating-linear-gradient(82deg,#8a7357 0 3px,#6f5a41 3px 4px,#9a8365 4px 8px)}
[data-sw=walnut]{background:
  repeating-linear-gradient(78deg,#5c4230 0 3px,#402c1e 3px 5px,#6b4e39 5px 9px)}
[data-sw=fenix]{background:linear-gradient(160deg,#767c7e,#5f6567 60%,#6d7375)}

.rail__reset{
  appearance:none;width:100%;background:none;border:0;
  border-top:1px solid color-mix(in srgb,var(--ink) 22%,transparent);
  padding:.75rem .9rem;cursor:pointer;text-align:left;
  font:400 .62rem/1 var(--fm);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);
  transition:background .2s var(--e),color .2s var(--e);
}
.rail__reset:hover{background:color-mix(in srgb,var(--ink) 7%,transparent);color:var(--ink)}

/* ---------- title block : the bottom band of the sheet ---------- */
.tblock{
  border-top:1px solid var(--ink);background:var(--paper);display:grid;min-width:0;
}
@media (min-width:760px){
  .tblock{grid-template-columns:minmax(0,.95fr) minmax(0,1.9fr) minmax(0,.85fr)}
}
.tblock__id{padding:.85rem .95rem;border-bottom:1px solid color-mix(in srgb,var(--ink) 26%,transparent)}
.tblock__drawn{font:400 .55rem/1.5 var(--fm);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.tblock__drawn span{display:block}
.tblock__t{
  font-family:var(--fd);font-weight:700;font-stretch:100%;font-size:1.15rem;line-height:1.12;
  letter-spacing:-.01em;margin:.35rem 0 .3rem;
}
.tblock__no{font:400 .58rem/1 var(--fm);letter-spacing:.08em;color:var(--ink-3)}
.tblock__no span{color:var(--ink-2)}
.tblock__spec{
  display:grid;grid-template-columns:1fr 1fr;
  border-bottom:1px solid color-mix(in srgb,var(--ink) 26%,transparent);
}
.tblock__spec > div{
  padding:.5rem .7rem;
  border-top:1px solid color-mix(in srgb,var(--ink) 14%,transparent);
  border-left:1px solid color-mix(in srgb,var(--ink) 14%,transparent);
}
.tblock__spec > div:nth-child(2n+1){border-left:0}
.tblock__spec > div:nth-child(-n+2){border-top:0}
@media (min-width:760px){
  .tblock__spec{grid-template-columns:repeat(3,1fr);border-bottom:0}
  .tblock__spec > div:nth-child(2n+1){border-left:1px solid color-mix(in srgb,var(--ink) 14%,transparent)}
  .tblock__spec > div:nth-child(3n+1){border-left:0}
  .tblock__spec > div:nth-child(-n+3){border-top:0}
}
.tblock__spec dt{font:400 .52rem/1.4 var(--fm);letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3)}
.tblock__spec dd{margin:.15rem 0 0;font:600 1.02rem/1.1 var(--fm);letter-spacing:-.02em}
.tblock__spec dd i{
  display:inline-block;font-style:normal;font-weight:400;font-size:.55rem;
  letter-spacing:.05em;color:var(--ink-3);margin-left:.25rem;
}
.tblock__spec dd span{transition:color .3s var(--e)}
.tblock__spec dd span.flash{color:var(--red-b)}
.tblock__foot{padding:.7rem .95rem;display:grid;gap:.45rem;align-content:start}
.tblock__lab{
  display:block;font:400 .52rem/1.4 var(--fm);letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);
}
.tblock__gbp{
  font-family:var(--fd);font-weight:800;font-stretch:96%;font-size:clamp(1.75rem,5.6vw,2.3rem);
  line-height:1;letter-spacing:-.035em;display:block;
}
.tblock__lead{font:600 .88rem/1.2 var(--fm)}
.tblock__band{
  grid-column:1/-1;padding:.45rem .95rem;
  border-top:1px solid color-mix(in srgb,var(--ink) 26%,transparent);
  display:flex;flex-wrap:wrap;gap:.3rem 1.4rem;justify-content:space-between;min-height:1.85rem;
}
.tblock__note{font:400 .6rem/1.45 var(--fm);letter-spacing:.03em;color:var(--ink-3);max-width:62ch}
.tblock__note.is-warn{color:var(--red);font-weight:600}
.tblock__live{font:400 .6rem/1.45 var(--fm);letter-spacing:.03em;color:var(--blue-d);text-align:right}
@media (min-width:760px){
  .tblock__id{border-bottom:0;border-right:1px solid color-mix(in srgb,var(--ink) 26%,transparent)}
  .tblock__spec{border-right:1px solid color-mix(in srgb,var(--ink) 26%,transparent)}
  .tblock__id,.tblock__foot{padding-top:.7rem}
}

/* buttons */
.btn{
  display:inline-block;text-decoration:none;cursor:pointer;text-align:center;
  font:600 .68rem/1 var(--fm);letter-spacing:.1em;text-transform:uppercase;
  padding:.82rem 1rem;border:1.5px solid var(--blue);background:var(--blue);color:var(--paper);
  transition:background .24s var(--e),color .24s var(--e),transform .24s var(--e);
}
.btn:hover{background:var(--blue-d);border-color:var(--blue-d);transform:translate3d(0,-1.5px,0)}
.btn--ghost{background:none;color:var(--blue);border-color:var(--blue)}
.btn--ghost:hover{background:var(--blue);color:var(--paper)}

/* mobile sticky summary */
.mbar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;
  display:grid;grid-template-columns:auto auto 1fr;align-items:center;gap:.7rem;
  padding:.55rem var(--gut);background:var(--ink);color:var(--paper);
  transform:translate3d(0,105%,0);transition:transform .42s var(--e);
}
.mbar.is-up{transform:none}
.mbar__k{font:400 .5rem/1.3 var(--fm);letter-spacing:.09em;text-transform:uppercase;opacity:.6;display:block}
.mbar__v{font:600 .95rem/1 var(--fm);letter-spacing:-.02em}
.mbar a{
  justify-self:end;text-decoration:none;border:1px solid var(--paper);
  padding:.5rem .7rem;font:600 .58rem/1 var(--fm);letter-spacing:.1em;text-transform:uppercase;
}
.mbar a:hover{background:var(--paper);color:var(--ink)}
@media (min-width:1100px){.mbar{display:none}}

/* ==========================================================================
   SHEET 2 : SPECIFICATION
   ========================================================================== */
.spec__grid{display:grid;gap:clamp(1.6rem,4vw,2.6rem);max-width:var(--maxw);margin:0 auto}
.spec__head{max-width:60ch}
.spec__head h2{margin-bottom:.85rem}
.spec__head p{color:var(--ink-2)}
@media (min-width:1000px){
  .spec__grid{grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);align-items:start}
  .spec__head{grid-column:1/-1;max-width:62ch}
  .plot{grid-row:2;grid-column:1}
  .revs{grid-row:2;grid-column:2}
  .derived{grid-column:1/-1}
}
.plot{margin:0;border:1px solid var(--ink);background:var(--sheet-2)}
.plot svg{width:100%;height:auto}
.plot figcaption{
  padding:.55rem .75rem;border-top:1px solid color-mix(in srgb,var(--ink) 30%,transparent);
  font:400 .6rem/1.5 var(--fm);letter-spacing:.02em;color:var(--ink-3);
}
.p-grid{stroke:color-mix(in srgb,var(--ink) 22%,transparent);stroke-width:.7;fill:none}
.p-grid-m{stroke:color-mix(in srgb,var(--ink) 38%,transparent);stroke-width:1;fill:none}
.p-lab{fill:var(--ink-3);font:400 10px/1 var(--fm);letter-spacing:.03em}
.p-cur{fill:none;stroke:var(--ink);stroke-width:2.4;stroke-linejoin:round;stroke-linecap:round}
.p-prev{fill:none;stroke:var(--red);stroke-width:1.4;stroke-dasharray:6 4;opacity:.85}
.p-f3{stroke:var(--blue);stroke-width:1;stroke-dasharray:3 3;fill:none}
.p-f3t{fill:var(--blue);font:500 10px/1 var(--fm);letter-spacing:.04em}
.p-key{
  fill:var(--ink-2);font:400 10px/1 var(--fm);letter-spacing:.04em;
  paint-order:stroke;stroke:var(--sheet-2);stroke-width:4px;stroke-linejoin:round;
}
.p-f3t{paint-order:stroke;stroke:var(--sheet-2);stroke-width:4px;stroke-linejoin:round}

.revs h3{margin-bottom:.5rem}
.revs__int{font-size:.88rem;color:var(--ink-2);margin-bottom:.9rem;max-width:46ch}
.revs__list{
  border-top:1px solid color-mix(in srgb,var(--ink) 30%,transparent);
  max-height:23rem;overflow-y:auto;overscroll-behavior:contain;
}
.revs__list li{
  display:grid;grid-template-columns:1.5rem 1fr auto;gap:.55rem;align-items:baseline;
  padding:.5rem .1rem;border-bottom:1px solid color-mix(in srgb,var(--ink) 16%,transparent);
  animation:revIn .5s var(--e) both;
}
@keyframes revIn{from{opacity:0;transform:translate3d(-6px,0,0)}}
@media (prefers-reduced-motion:reduce){.revs__list li{animation:none}}
.rev__l{font:700 .74rem/1.3 var(--fm);color:var(--red)}
.rev__w{font:400 .74rem/1.4 var(--fb);color:var(--ink)}
.rev__w b{font-weight:600}
.rev__d{font:400 .66rem/1.4 var(--fm);color:var(--blue-d);text-align:right;white-space:nowrap}
.revs__empty{padding:.9rem .1rem;font:400 .74rem/1.5 var(--fb);color:var(--ink-3)}

.derived h3{margin-bottom:.9rem}
.derived__dl{
  display:grid;gap:0;grid-template-columns:1fr;
  border-top:1px solid color-mix(in srgb,var(--ink) 30%,transparent);
}
.derived__dl > div{
  display:grid;grid-template-columns:1fr auto;gap:1rem;padding:.55rem .1rem;
  border-bottom:1px solid color-mix(in srgb,var(--ink) 16%,transparent);
}
@media (min-width:700px){.derived__dl{grid-template-columns:1fr 1fr;column-gap:2.5rem}}
@media (min-width:1200px){.derived__dl{grid-template-columns:repeat(4,1fr)}}
.derived__dl dt{font:400 .7rem/1.4 var(--fb);color:var(--ink-3)}
.derived__dl dd{font:500 .74rem/1.4 var(--fm);text-align:right}

/* ==========================================================================
   SHEET 3 : THE CABINET
   ========================================================================== */
.cab{background:var(--sheet-2)}
.cab__inner{max-width:var(--maxw);margin:0 auto}
.cab__h{margin-bottom:clamp(1.6rem,4vw,2.8rem);max-width:26ch}
/* the section opens wide on one statement, then narrows into two columns */
.cab__lead{
  font-family:var(--fd);font-weight:600;font-stretch:100%;
  font-size:clamp(1.3rem,2.6vw,1.95rem);line-height:1.22;letter-spacing:-.022em;
  max-width:44ch;margin-bottom:clamp(1.8rem,4.5vw,3rem);text-wrap:balance;
}
.cab__cols{display:grid;gap:clamp(2rem,5vw,3.5rem)}
@media (min-width:960px){
  .cab__cols{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(2.5rem,6vw,5rem)}
}
.cab__text{max-width:68ch;display:grid;gap:1.05rem}
.cab__text p{color:var(--ink-2)}
.cab__text .lead{color:var(--ink)}
.cab__fig{margin:0}
.secdraw{width:100%;height:auto;color:var(--ink);background:var(--sheet);border:1px solid var(--ink)}
.secdraw [stroke="#141A16"]{stroke:var(--ink)}
.secdraw [fill="#C9CFC9"]{fill:var(--sheet)}
.secdraw [fill="#B9C1BA"]{fill:var(--sheet-3)}
.secdraw [stroke="#1B44C8"]{stroke:var(--blue)}
.secdraw__lab text{font:500 10.5px/1 var(--fm);letter-spacing:.02em;fill:var(--blue)}
.secdraw__lab text:last-of-type,.secdraw__lab text:nth-of-type(3){text-anchor:start}
.cab__fig figcaption{
  margin-top:.6rem;font:400 .64rem/1.55 var(--fm);letter-spacing:.02em;color:var(--ink-3);
}

/* ==========================================================================
   SHEET 4 : THE CROSSOVER
   ========================================================================== */
.xo__inner{max-width:var(--maxw);margin:0 auto}
.xo__h{margin-bottom:clamp(1.6rem,4vw,2.8rem);max-width:24ch}
.xo__cols{display:grid;gap:clamp(1.8rem,4.5vw,3rem)}
@media (min-width:960px){
  .xo__cols{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(2.2rem,5vw,4rem);align-items:start}
  .xo__fig{position:sticky;top:74px}
}
.xo__fig{margin:0}
#schem{width:100%;height:auto;background:var(--paper);border:1px solid var(--ink)}
.xo__fig figcaption{margin-top:.6rem;font:400 .64rem/1.55 var(--fm);color:var(--ink-3)}
.s-w{fill:none;stroke:var(--ink);stroke-width:1.5;stroke-linecap:square}
.s-c{fill:none;stroke:var(--ink);stroke-width:1.9}
.s-n{fill:var(--ink)}
.s-t{fill:var(--ink);font:600 11px/1 var(--fm);letter-spacing:.02em}
.s-v{fill:var(--blue);font:500 11px/1 var(--fm);letter-spacing:.02em}
.s-lab{fill:var(--ink-3);font:400 9.5px/1 var(--fm);letter-spacing:.06em}
.xo__text{display:grid;gap:1.05rem;max-width:66ch}
.xo__text p{color:var(--ink-2)}
.xo__text .lead{color:var(--ink)}
.xo__vals{
  margin-top:.6rem;border-top:1px solid color-mix(in srgb,var(--ink) 30%,transparent);
}
.xo__vals > div{
  display:grid;grid-template-columns:1fr auto;gap:1rem;padding:.5rem .1rem;
  border-bottom:1px solid color-mix(in srgb,var(--ink) 16%,transparent);
}
.xo__vals dt{font:400 .72rem/1.4 var(--fb);color:var(--ink-3)}
.xo__vals dd{font:500 .78rem/1.4 var(--fm)}
.xo__vals dd span{font-weight:700;color:var(--blue-d)}

/* ==========================================================================
   GENERAL NOTES : the quiet, wide, low-density band in the scroll
   ========================================================================== */
.notes{padding-top:clamp(2.4rem,6vw,4rem);padding-bottom:clamp(2.4rem,6vw,4rem)}
.notes__in{max-width:min(var(--maxw),1080px)}
.notes__h{
  font-family:var(--fm) !important;font-weight:400 !important;
  font-size:.68rem !important;letter-spacing:.22em;text-transform:uppercase;
  color:var(--ink-3);padding-bottom:1.2rem;
  border-bottom:1px solid color-mix(in srgb,var(--ink) 30%,transparent);
}
.notes__list{
  counter-reset:n;margin-top:1.6rem;display:grid;
  gap:1.25rem clamp(2rem,4.5vw,4rem);
}
@media (min-width:900px){.notes__list{grid-template-columns:repeat(2,minmax(0,1fr))}}
.notes__list li{
  counter-increment:n;display:grid;grid-template-columns:2.1rem minmax(0,1fr);gap:.7rem;
  font:400 .82rem/1.85 var(--fm);letter-spacing:.005em;color:var(--ink-2);
}
.notes__list li::before{content:counter(n) "."; color:var(--blue);font-weight:600}
.meas{background:var(--ink);color:var(--sheet)}
.meas__inner{max-width:var(--maxw);margin:0 auto}
.meas h2{color:var(--paper)}
.meas__lead{max-width:52ch;margin-bottom:clamp(2rem,5vw,3.4rem)}
.meas__lead h2{margin-bottom:.9rem}
.meas__lead p{color:color-mix(in srgb,var(--sheet) 78%,transparent);font-size:1.06rem}
.meas__list{display:grid;gap:0;border-top:1px solid color-mix(in srgb,var(--sheet) 26%,transparent)}
@media (min-width:820px){
  .meas__list{grid-template-columns:1fr 1fr;column-gap:clamp(2rem,5vw,4.5rem)}
}
@media (min-width:1300px){.meas__list{grid-template-columns:repeat(4,1fr)}}
.meas__list li{
  padding:1.15rem 0;border-bottom:1px solid color-mix(in srgb,var(--sheet) 22%,transparent);
}
.meas__list h3{color:var(--paper);margin-bottom:.5rem;font-stretch:96%}
.meas__list p{color:color-mix(in srgb,var(--sheet) 72%,transparent);font-size:.9rem;max-width:44ch}
.meas__sign{
  margin-top:clamp(1.6rem,4vw,2.4rem);
  font:400 .68rem/1.5 var(--fm);letter-spacing:.05em;
  color:color-mix(in srgb,var(--sheet) 74%,transparent);
}

/* ==========================================================================
   SHEET 6 : MODELS
   ========================================================================== */
.mod__inner{max-width:var(--maxw);margin:0 auto}
.mod__h{max-width:24ch}
.mod__int{margin:1rem 0 clamp(2rem,5vw,3.2rem);max-width:56ch;color:var(--ink-2)}
/* the three models on one scale */
.modscale{margin:0 0 clamp(1.6rem,4vw,2.6rem);border:1px solid var(--ink);background:var(--sheet-2)}
.modscale svg{width:100%;height:auto}

.mod__list{display:grid;gap:0;border-top:1px solid color-mix(in srgb,var(--ink) 30%,transparent)}
@media (min-width:900px){
  .mod__list{
    grid-template-columns:repeat(3,1fr);column-gap:clamp(1.4rem,3.5vw,3rem);
    border-bottom:1px solid color-mix(in srgb,var(--ink) 20%,transparent);
  }
}
.mcard{
  padding:clamp(1.3rem,3vw,1.9rem) 0;
  border-bottom:1px solid color-mix(in srgb,var(--ink) 20%,transparent);
}
@media (min-width:900px){.mcard{border-bottom:0}}
.mcard__body{display:grid;gap:.6rem;max-width:62ch}
.mcard h3{font-size:clamp(1.3rem,3.6vw,1.9rem);font-stretch:104%;letter-spacing:-.02em}
.mcard__d{font:400 .68rem/1 var(--fm);letter-spacing:.08em;color:var(--ink-3)}
.mcard p{color:var(--ink-2);font-size:.94rem}
.mcard__from{font:600 .82rem/1 var(--fm) !important;color:var(--ink) !important;letter-spacing:-.01em}
.mcard .btn{justify-self:start;margin-top:.35rem}

/* ==========================================================================
   SHEET 7 : ORDERING
   ========================================================================== */
.ord{background:var(--sheet-2)}
.ord__inner{max-width:var(--maxw);margin:0 auto;display:grid;gap:clamp(2rem,5vw,3.4rem)}
.ord__head{max-width:52ch}
.ord__head h2{margin-bottom:.9rem}
.ord__head p{color:var(--ink-2);font-size:1.06rem}
@media (min-width:1000px){
  .ord__inner{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:start;column-gap:clamp(2.5rem,6vw,5rem)}
  .ord__head{grid-column:1/-1}
  .ord__box{position:sticky;top:74px}
}
/* a real sequence: the order of the steps is the information */
.ord__steps{counter-reset:s;border-top:1px solid color-mix(in srgb,var(--ink) 30%,transparent)}
.ord__steps li{
  counter-increment:s;display:grid;grid-template-columns:2.1rem minmax(0,1fr);gap:.9rem;
  padding:1.05rem 0;border-bottom:1px solid color-mix(in srgb,var(--ink) 18%,transparent);
}
.ord__steps li::before{
  content:counter(s);font:700 .82rem/1.5 var(--fm);color:var(--blue);
}
.ord__steps h3{margin-bottom:.35rem}
.ord__steps p{color:var(--ink-2);font-size:.94rem;max-width:60ch}
.ord__box{border:1.5px solid var(--ink);background:var(--paper);padding:clamp(1.2rem,3vw,1.8rem)}
.ord__box h3{margin-bottom:.7rem}
.ord__box p{color:var(--ink-2);font-size:.94rem}
.ord__box p + p{margin-top:.85rem}
.ord__contact{display:grid;gap:.85rem;margin-top:1.2rem}
.ord__contact .btn{justify-self:start}
.ord__contact span{font:400 .76rem/1.55 var(--fb);color:var(--ink-3)}

/* ==========================================================================
   FOOT
   ========================================================================== */
.foot{background:var(--ink);color:color-mix(in srgb,var(--sheet) 80%,transparent);padding:clamp(2.4rem,6vw,4rem) var(--gut) 5.5rem}
@media (min-width:1100px){.foot{padding-bottom:clamp(2.4rem,6vw,4rem)}}
.foot__in{
  max-width:var(--maxw);margin:0 auto;display:grid;gap:1.8rem;
}
@media (min-width:760px){
  .foot__in{grid-template-columns:1.5fr 1fr 1.2fr;gap:clamp(1.5rem,4vw,3.5rem)}
  .foot__credit{grid-column:1/-1}
}
.foot__blk p{font-size:.84rem;line-height:1.6}
.foot__name{
  font-family:var(--fd) !important;font-weight:800;font-stretch:108%;
  font-size:.95rem !important;letter-spacing:.1em;text-transform:uppercase;color:var(--paper);
  margin-bottom:.55rem !important;
}
.foot__lab{
  font:400 .55rem/1 var(--fm) !important;letter-spacing:.14em;text-transform:uppercase;
  color:color-mix(in srgb,var(--sheet) 72%,transparent);margin-bottom:.7rem !important;
}
.foot__blk ul{display:grid;gap:.4rem}
.foot__blk a{text-decoration:none;font-size:.84rem;border-bottom:1px solid transparent;transition:border-color .2s var(--e)}
.foot__blk a:hover{border-bottom-color:currentColor}
.foot__credit{
  padding-top:1.4rem;border-top:1px solid color-mix(in srgb,var(--sheet) 20%,transparent);
  font:400 .72rem/1.5 var(--fm);letter-spacing:.04em;
  color:color-mix(in srgb,var(--sheet) 74%,transparent);
}
.foot__credit a{color:var(--sheet);text-decoration:none;border-bottom:1px solid color-mix(in srgb,var(--sheet) 45%,transparent)}
.foot__credit a:hover{border-bottom-color:var(--sheet)}

/* --- touch targets: everything tappable clears 44px on a phone ----------- */
@media (max-width:1099px) and (pointer:coarse),(max-width:640px){
  .viewtog__b{padding:.85rem 1rem}
  .mast__order{padding:.72rem .95rem !important}
  .mark{padding:.35rem 0}
  .btn{padding:1rem 1.1rem}
  .sw{padding:.6rem .35rem}
  .chip{padding:.72rem .3rem .68rem}
  .rail__reset{padding:1rem .9rem}
  .mbar a{padding:.75rem .85rem}
  .foot__blk a,.mast__nav a{display:inline-block;padding:.45rem 0}
  input[type=range]{height:44px}
  input[type=range]::-webkit-slider-thumb{width:18px;height:26px;margin-top:-13px}
  input[type=range]::-moz-range-thumb{width:18px;height:26px}
}

@media print{.frame,.mast,.mbar{display:none}}