@font-face {
  font-family: 'Archivo';
  src: url(../fonts/archivo-latin-ext.woff2) format('woff2');
  font-weight: 100 900; font-stretch: 62% 125%; font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Archivo';
  src: url(../fonts/archivo-latin.woff2) format('woff2');
  font-weight: 100 900; font-stretch: 62% 125%; font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --paper: #EDEEEA;
  --sheet: #F6F7F4;
  --ink: #15181B;
  --ink-2: #4A5056;
  --ink-3: #646A6F;
  --rule: rgba(21, 24, 27, .17);
  --rule-2: rgba(21, 24, 27, .08);
  --red: #C23B22;
  --red-deep: #9E2E19;
  --night: #121417;
  --night-2: #1B1E22;
  --on-night: #E8E9E5;
  --on-night-2: #A3A9AE;

  --wool: #E6CC7C; --eps: #E3E5E1; --dhf: #B98F67; --wood: #DDBE8F; --rafter: #E4CBA0; --osb: #CDAC77;
  --gyps: #FBFBF8; --render: #CFCFC8; --concrete: #BEC1C1; --screed: #D6D2C8; --lam: #8C6F52;
  --brick: #C0705A; --tile: #4A4F55; --gravel: #DAD7CF; --glass: #C3D4DB; --steel: #5B6268; --dark-layer: #2A2E33;

  --f: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --gut: clamp(20px, 4vw, 56px);
  --col: clamp(400px, 36vw, 580px);
  --head: 64px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--head) + 16px); }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 17px/1.6 var(--f); font-stretch: 100%;
  font-variant-numeric: tabular-nums; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
::selection { background: var(--red); color: #fff; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .22em; }
h1, h2, h3, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }
html { scrollbar-color: var(--ink-3) var(--paper); }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--ink-3); border: 3px solid var(--paper); }

.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--ink); color: var(--paper); padding: 10px 16px; }
.skip:focus { top: 12px; }

.wrap { max-width: 1360px; margin: 0 auto; padding: 0 var(--gut); }

/* ---------- small type ---------- */
.k, .tblock dt, .spec dt, .tb__k, .stage__meta, .mats__list dt, .rev caption, .rev th, .lbl, .field label, .f-group legend, .range label, .ph figcaption span {
  font-size: 11.5px; line-height: 1.3; font-weight: 500; font-stretch: 125%; letter-spacing: .13em; text-transform: uppercase;
}

/* ---------- buttons, links ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 14px; min-height: 54px; padding: 0 26px;
  background: var(--red); color: #fff; text-decoration: none; border: 0; border-radius: 0; cursor: pointer;
  font-size: 15px; font-weight: 500; font-stretch: 112%; letter-spacing: .02em;
  transition: background-color .35s var(--ease);
}
.btn::after {
  content: ''; width: 26px; height: 1px; background: currentColor;
  box-shadow: none; transition: width .45s var(--ease);
  -webkit-mask: none; position: relative;
}
.btn:hover { background: var(--ink); }
.btn:hover::after { width: 38px; }
.btn--sm { min-height: 40px; padding: 0 16px; font-size: 13.5px; gap: 10px; }
.btn--sm::after { width: 14px; }
.btn--sm:hover::after { width: 20px; }
.btn--lg { min-height: 60px; padding: 0 30px; font-size: 16px; }
.btn[disabled] { background: var(--ink-3); cursor: progress; }
.link { color: var(--ink); font-weight: 500; text-decoration: underline; text-decoration-color: var(--rule); transition: text-decoration-color .3s; }
.link:hover { text-decoration-color: var(--red); }

/* ---------- header ---------- */
.top { position: fixed; inset: 0 0 auto 0; z-index: 50; height: var(--head); background: var(--paper); border-bottom: 1px solid var(--rule); }
.top__in { height: 100%; display: flex; align-items: center; gap: 28px; padding: 0 var(--gut); max-width: none; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; margin-right: auto; }
.brand__mark { width: 30px; height: 30px; fill: none; stroke: var(--ink); stroke-width: 1.4; flex: none; }
.brand__tri { fill: var(--red); stroke: none; }
.brand__mark text { fill: var(--ink); stroke: none; font: 600 9px var(--f); font-stretch: 125%; }
.brand__name { font-size: 15px; font-weight: 600; font-stretch: 125%; letter-spacing: .16em; text-transform: uppercase; white-space: nowrap; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav ul { display: flex; gap: 26px; }
.nav a { text-decoration: none; font-size: 11.5px; font-weight: 500; font-stretch: 125%; letter-spacing: .13em; text-transform: uppercase; color: var(--ink-2); transition: color .25s; padding: 6px 0; }
.nav a:hover, .nav a[aria-current] { color: var(--ink); }
.nav a[aria-current] { box-shadow: inset 0 -1px 0 var(--red); }
.nav__tel { font-weight: 500; color: var(--ink) !important; font-variant-numeric: tabular-nums; }
.menu { display: none; }

/* ============ REZ / stage ============ */
.rez { position: relative; }
.stage {
  position: sticky; top: 0; height: 100vh; height: 100svh; overflow: hidden;
  background-color: var(--paper);
  background-image: radial-gradient(rgba(21, 24, 27, .11) 1px, transparent 1.2px);
  background-size: 24px 24px; background-position: 12px 12px;
}
.stage::before {
  /* the title column: a solid strip of the sheet, divided by a hairline */
  content: ''; position: absolute; z-index: 1; left: 0; top: 0; bottom: 0; width: calc(var(--col) + 64px);
  background: var(--paper); border-right: 1px solid var(--rule);
}
.stage__svg, .stage__lead { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.stage__lead { pointer-events: none; z-index: 2; }
.stage__lead path { fill: none; stroke: var(--ink); stroke-width: .8; }
.stage__lead circle { fill: var(--ink); }
.stage__lead .ld-c { fill: none; stroke: var(--red); stroke-width: 1; stroke-dasharray: 10 4 2 4; }
.stage__ann { position: absolute; inset: 0; z-index: 3; pointer-events: none; }
.stage::after {
  /* the sheet frame */
  content: ''; position: absolute; z-index: 3; inset: calc(var(--head) + 16px) 16px 16px calc(var(--col) + 64px + 16px);
  border: 1px solid var(--ink); pointer-events: none;
}
.stage__meta {
  position: absolute; z-index: 4; right: 16px; bottom: 16px; display: flex; align-items: center; gap: 22px; color: var(--ink-2);
  padding: 22px 22px 12px; background: var(--sheet); border-top: 1px solid var(--ink); border-left: 1px solid var(--ink);
}
.stage__scale b { font-weight: 600; color: var(--ink); letter-spacing: .06em; display: inline-block; min-width: 4.6em; }
.scalebar { position: relative; width: var(--w, 100px); height: 6px; border: 1px solid var(--ink); background: linear-gradient(90deg, var(--ink) 50%, transparent 50%); background-size: 50% 100%; transition: width .2s; }
.scalebar::before, .scalebar::after { position: absolute; top: -18px; font-size: 11px; letter-spacing: .06em; }
.scalebar::before { content: '0'; left: -3px; }
.scalebar::after { content: attr(data-l); right: 0; transform: translateX(50%); white-space: nowrap; text-transform: none; }

/* drawing */
.stage__svg { --u: 18; --lod0: 1; --lod1: 0; --lod2: 0; --hatch: .3; }
.m { stroke: var(--ink); stroke-opacity: .5; stroke-width: calc(var(--u) * .5px); transition: fill-opacity .3s, stroke .3s; }
.m-wool { fill: var(--wool); } .m-eps { fill: var(--eps); } .m-dhf { fill: var(--dhf); } .m-wood { fill: var(--wood); }
.m-rafter { fill: var(--rafter); } .m-osb { fill: var(--osb); } .m-gyps { fill: var(--gyps); } .m-render { fill: var(--render); }
.m-concrete { fill: var(--concrete); } .m-screed { fill: var(--screed); } .m-lam { fill: var(--lam); } .m-brick { fill: var(--brick); }
.m-tile { fill: var(--tile); } .m-gravel { fill: var(--gravel); } .m-glass { fill: var(--glass); fill-opacity: .8; }
.m-frame { fill: #3A3F45; } .m-steel { fill: var(--steel); }
.m-pvc, .m-delta, .m-hydro { fill: var(--dark-layer); }
.m-soil { fill: url(#soil); stroke: none; }
.soil-l { fill: none; stroke: var(--ink); stroke-opacity: .32; stroke-width: calc(var(--u) * .6px); } .m-foil { fill: #9AA3AA; }
.hatch { opacity: var(--hatch); }
.h { fill: none; stroke: var(--ink); stroke-width: calc(var(--u) * .55px); stroke-linecap: round; stroke-linejoin: round; }
.h-wave { stroke-opacity: .5; }
.h-zig { stroke-opacity: .35; }
.h-agg { stroke-opacity: .55; stroke-width: calc(var(--u) * 1.5px); }
.h-peb { stroke-opacity: .5; }
.h-dot { stroke-opacity: .35; stroke-width: calc(var(--u) * 1.3px); }
.h-osb { stroke-opacity: .4; stroke-width: calc(var(--u) * 1.4px); }
.h-brick, .h-timber, .h-grain { stroke-opacity: .45; }
.h-rebar { stroke-opacity: .7; stroke-width: calc(var(--u) * .9px); stroke-dasharray: calc(var(--u) * 10px) calc(var(--u) * 3px); }
.h-rebar-dot { stroke-width: calc(var(--u) * 2.6px); }
.h-heat { stroke: var(--red); stroke-width: calc(var(--u) * 1px); }
.h-steel { stroke: var(--steel); stroke-width: calc(var(--u) * 1px); }
.h-glass { stroke: #6E8C99; stroke-width: calc(var(--u) * .9px); }
.beyond { opacity: calc(var(--lod0) * .9); }
.beyond path { fill: none; stroke: var(--ink-3); stroke-width: calc(var(--u) * .7px); stroke-linejoin: round; }
.o { fill: none; stroke: var(--ink); stroke-width: calc(var(--u) * 1.3px); stroke-linejoin: miter; }
.o-ground { stroke-width: calc(var(--u) * 1.7px); }
.dims path { fill: none; stroke: var(--ink-2); stroke-width: calc(var(--u) * .7px); }
.dims.lod0 { opacity: var(--lod0); } .dims.lod1 { opacity: var(--lod1); } .dims.lod2 { opacity: var(--lod2); }
.dt { font-family: var(--f); font-size: calc(var(--u) * 11px); font-weight: 500; fill: var(--ink-2); letter-spacing: .03em; paint-order: stroke; stroke: var(--paper); stroke-width: calc(var(--u) * 3.5px); stroke-linejoin: round; }
.dt.lv { fill: var(--ink); }
.dt-b { font-weight: 600; fill: var(--ink); }
.rt { font-family: var(--f); font-size: calc(var(--u) * 10.5px); font-weight: 500; font-stretch: 125%; letter-spacing: .18em; text-transform: uppercase; fill: var(--ink-2); }
.has-hl .m:not(.is-hl) { fill-opacity: .28; }
.m.is-hl { stroke: var(--red); stroke-opacity: 1; stroke-width: calc(var(--u) * 2px); }

/* intro: the plotter draws the cut lines, then the materials settle in */
.intro .o { stroke-dasharray: 1; animation: draw 1.5s var(--d) cubic-bezier(.65, 0, .25, 1) backwards; }
.intro .mats, .intro .hatch { animation: fade 1.1s 1.05s var(--ease) backwards; }
.intro .beyond, .intro .dims.lod0 { animation: fade .9s 1.6s var(--ease) backwards; }
@keyframes draw { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }
@keyframes fade { from { opacity: 0; } }

/* annotation bubbles */
.ann {
  position: absolute; left: 0; top: 0; width: 26px; height: 26px; margin: -13px 0 0 -13px; padding: 0;
  display: grid; place-items: center; border-radius: 50%; border: 1px solid var(--ink); background: var(--sheet);
  font-size: 12px; font-weight: 600; line-height: 1; cursor: default; pointer-events: auto;
  transition: background-color .25s, color .25s, border-color .25s;
}
.ann[hidden] { display: none; }
.ann.is-off { pointer-events: none; }
.ann.is-active { background: var(--red); border-color: var(--red); color: #fff; }
/* detail callout: the drawing's own symbol, a circle split by a line, number over scale */
.ann--detail {
  width: auto; height: 44px; margin: -22px 0 0 -22px; padding: 0; border: 0; border-radius: 0; background: none; gap: 10px;
  display: inline-flex; align-items: center; cursor: pointer; white-space: nowrap;
}
.ann--detail b {
  position: relative; display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%;
  border: 1.5px solid var(--red); background: var(--sheet); overflow: hidden; transition: background-color .3s, color .3s;
}
.ann--detail i { font-style: normal; font-size: 13px; font-weight: 700; line-height: 1; }
.ann--detail span { font-size: 11.5px; font-weight: 500; font-stretch: 125%; letter-spacing: .13em; text-transform: uppercase; padding: 4px 0; border-bottom: 1px solid var(--ink); background: var(--paper); }
.ann--detail:hover b { background: var(--red); color: #fff; }
.ann--detail:hover b i { color: #fff; }

/* steps scroll over the sticky stage */
.steps { overflow-anchor: none; position: relative; z-index: 4; margin-top: -100vh; margin-top: -100svh; pointer-events: none; }
.step { min-height: 100vh; min-height: 100svh; display: flex; align-items: center; }
.step__in { pointer-events: auto; width: calc(var(--col) + 64px); padding: 0 48px 0 var(--gut); }
.step--hero .step__in { padding-top: var(--head); }

.hero__title { font-size: clamp(2.6rem, 5.5vw, 5.5rem); line-height: .98; font-weight: 380; letter-spacing: -.038em; text-wrap: balance; }
.hero__lede { margin-top: 30px; max-width: 36ch; color: var(--ink-2); font-size: 18px; line-height: 1.55; }
.hero__act { margin-top: 38px; display: flex; flex-wrap: wrap; align-items: center; gap: 18px 26px; }
.hero__act .link { font-size: 15px; }
.tblock { display: grid; grid-template-columns: 1fr 1fr 1fr; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--rule); }
.tblock div { padding: 12px 14px 14px 0; }
.tblock div + div { padding-left: 14px; border-left: 1px solid var(--rule); }
.tblock dt { color: var(--ink-3); font-size: 11px; }
.tblock dd { margin-top: 6px; font-size: 14px; line-height: 1.3; font-weight: 500; }
.hero__tb { margin-top: 56px; }
.hero__cue { margin-top: 28px; display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--ink-2); }
.hero__cue span { width: 1px; height: 34px; background: var(--ink); position: relative; overflow: hidden; }
.hero__cue span::after { content: ''; position: absolute; left: 0; top: -40%; width: 1px; height: 40%; background: var(--red); animation: cue 2.4s 2.6s var(--ease) 2 backwards; }
@keyframes cue { to { top: 100%; } }

.panel h2 { font-size: clamp(1.9rem, 2.5vw, 2.6rem); line-height: 1.05; font-weight: 400; letter-spacing: -.03em; }
.panel h2 span { display: block; margin-top: 6px; font-size: 13px; letter-spacing: .14em; font-weight: 500; font-stretch: 125%; text-transform: uppercase; color: var(--ink-2); }
.panel h2 span[hidden] { display: none; }
.panel__head { display: flex; flex-direction: column; gap: 22px; margin-bottom: 22px; }
.panel > p { color: var(--ink-2); max-width: 42ch; }
.panel__sum { margin-top: 22px; font-size: 15px; }
.panel__sum b { color: var(--ink); font-weight: 600; }
.seg { display: inline-flex; align-self: flex-start; border: 1px solid var(--ink); }
.seg button { border: 0; background: transparent; padding: 9px 14px; font-size: 13px; font-weight: 500; cursor: pointer; transition: background-color .25s, color .25s; }
.seg button + button { border-left: 1px solid var(--ink); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.seg button:not([aria-pressed="true"]):hover { background: rgba(21, 24, 27, .06); }

.legend { margin-top: 18px; border-top: 1px solid var(--ink); }
.legend[hidden] { display: none; }
.legend li {
  display: grid; grid-template-columns: 30px 1fr auto; gap: 12px; align-items: baseline;
  padding: 9px 0; border-bottom: 1px solid var(--rule-2); font-size: 14.5px; line-height: 1.35; cursor: default;
  transition: color .2s;
}
.legend__n { display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; border: 1px solid var(--ink); font-size: 11px; font-weight: 600; transform: translateY(5px); transition: background-color .2s, color .2s, border-color .2s; }
.legend__val { color: var(--ink-2); white-space: nowrap; font-size: 13.5px; }
.legend li.is-active .legend__n { background: var(--red); border-color: var(--red); color: #fff; }
.legend li.is-active .legend__name { color: var(--red-deep); }
.panel--end .end__title { font-size: clamp(2rem, 3vw, 3rem); }
.panel--end p { margin: 22px 0 32px; }

/* ============ sections ============ */
.sec { padding: clamp(104px, 12vw, 184px) 0; position: relative; }
.sec--sheet { background: var(--sheet); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.sec__head { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 24px 64px; align-items: end; margin-bottom: clamp(56px, 7vw, 96px); }
.sec__title { font-size: clamp(2.1rem, 3.9vw, 4rem); line-height: 1.02; font-weight: 380; letter-spacing: -.035em; text-wrap: balance; }
.sec__lede { color: var(--ink-2); font-size: 17.5px; max-width: 46ch; }

/* systems */
.sys { display: grid; grid-template-columns: 7fr 5fr; border-top: 1px solid var(--ink); }
.sys__item { padding: 40px 48px 44px 0; }
.sys__item + .sys__item { padding: 40px 0 44px 48px; border-left: 1px solid var(--rule); }
.sys__item h3 { font-size: clamp(1.6rem, 2.2vw, 2.2rem); font-weight: 400; letter-spacing: -.025em; line-height: 1.1; }
.sys__item h3 span { color: var(--ink-3); }
.sys__item--main h3 span { color: var(--ink-2); }
.sys__item p { margin-top: 18px; color: var(--ink-2); max-width: 52ch; }
.spec { margin-top: 30px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--rule); max-width: 560px; }
.spec div { padding: 14px 16px 0 0; }
.spec div + div { padding-left: 18px; border-left: 1px solid var(--rule); }
.spec dt { color: var(--ink-3); font-size: 11px; }
.spec dd { margin-top: 6px; font-size: 22px; font-weight: 400; letter-spacing: -.01em; }

.cmp { margin-top: 72px; display: grid; grid-template-columns: 1fr 340px; gap: 48px; align-items: center; padding: 40px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.cmp__svg { width: 100%; height: auto; overflow: visible; }
.cmp__lbl { font: 500 12px var(--f); font-stretch: 125%; letter-spacing: .14em; text-transform: uppercase; fill: var(--ink-2); }
.cmp__dim { fill: none; stroke: var(--ink-2); stroke-width: 1; }
.cmp__v { font: 600 13px var(--f); fill: var(--ink); }
.cmp__gap { fill: none; stroke: var(--red); stroke-width: 1; stroke-dasharray: 4 3; }
.cmp__gapd { fill: none; stroke: var(--red); stroke-width: 1; }
.cmp__gv { font: 600 11px var(--f); fill: var(--red); }
.cmp__svg .cmp__lbl { font-size: 9px; }
.cmp__svg .cmp__v { font-size: 11px; }
.cmp__big { font-size: clamp(2.2rem, 3.4vw, 3.2rem); line-height: 1; letter-spacing: -.03em; font-weight: 380; color: var(--ink); margin-bottom: 14px; }
.cmp__big b { font-weight: 500; color: var(--red); }
.cmp__cap p:last-child { color: var(--ink-2); font-size: 15px; }

.brick { margin-top: clamp(96px, 10vw, 150px); display: grid; grid-template-columns: 4fr 5fr 3fr; gap: 28px; align-items: end; }
.brick__text h3 { font-size: clamp(1.6rem, 2.2vw, 2.2rem); font-weight: 400; letter-spacing: -.025em; line-height: 1.1; }
.brick__text p { margin: 18px 0 22px; color: var(--ink-2); }
.brick__ph img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; filter: saturate(.82) contrast(1.03); }
.brick__ph--b img { aspect-ratio: 3 / 4; }
.brick__ph figcaption, .ph figcaption { margin-top: 10px; font-size: 12.5px; color: var(--ink-2); }

/* turnkey spec sheet */
.spec-sheet { display: grid; grid-template-columns: 1fr 1fr .8fr; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.spec-g, .spec-extra { padding: 30px 36px 36px; }
.spec-g:nth-child(odd) { padding-left: 0; }
.spec-g:nth-child(even), .spec-extra { border-left: 1px solid var(--rule); }
.spec-g:nth-child(n+3) { border-top: 1px solid var(--rule); }
.spec-extra { grid-column: 3; grid-row: 1 / span 2; }
.spec-g h3, .spec-extra h3 { font-size: 17px; font-weight: 600; letter-spacing: -.01em; display: flex; gap: 12px; align-items: baseline; padding-bottom: 18px; margin-bottom: 6px; border-bottom: 1px solid var(--rule); }
.spec-g h3 span { color: var(--ink-2); font-weight: 500; font-stretch: 125%; }
.spec-g li { padding: 12px 0; border-bottom: 1px solid var(--rule-2); font-size: 15px; line-height: 1.45; display: grid; grid-template-columns: 38px 1fr; }
.spec-g li span { color: var(--ink-3); font-size: 12.5px; padding-top: 2px; }
.spec-extra { background: var(--paper); }
.spec-extra li { padding: 10px 0; border-bottom: 1px solid var(--rule-2); font-size: 15px; }
.spec-extra li::before { content: ''; display: inline-block; width: 10px; height: 1px; background: var(--ink); vertical-align: middle; margin-right: 12px; }
.spec-extra p { margin-top: 22px; font-size: 15px; color: var(--ink-2); }
.spec-extra p b { color: var(--ink); font-weight: 600; display: block; }
.foot-note { margin-top: 16px; font-size: 13px; color: var(--ink-2); }

/* process: one dimension chain */
/* the process is the one band on ink: a clear pause between offer and proof */
#postup { background: var(--ink); color: var(--on-night); border-top: 0; }
#postup .sec__lede, #postup .chain p { color: var(--on-night-2); }
#postup .chain::before { background: var(--on-night); }
#postup .chain li::before { color: var(--on-night-2); }
#postup .chain li::after { background: linear-gradient(135deg, transparent 46%, var(--on-night) 46%, var(--on-night) 54%, transparent 54%); }
#postup ::selection { background: var(--red); color: #fff; }
.chain { display: grid; grid-template-columns: repeat(5, 1fr); counter-reset: st; position: relative; }
.chain::before { content: ''; position: absolute; left: 0; right: 0; top: 44px; height: 1px; background: var(--ink); transform-origin: left; transition: transform 1.6s var(--ease); }
.chain li { position: relative; padding: 0 28px 0 0; counter-increment: st; }
.chain li::before {
  content: counter(st); display: block; height: 30px; font-size: 13px; font-weight: 600; font-stretch: 125%; letter-spacing: .1em; color: var(--ink-2);
}
.chain li::after {
  /* the 45° dimension tick */
  content: ''; position: absolute; left: -7px; top: 37px; width: 15px; height: 15px;
  background: linear-gradient(135deg, transparent 46%, var(--ink) 46%, var(--ink) 54%, transparent 54%);
}
.chain li:last-child { padding-right: 0; }
.chain h3 { margin-top: 34px; font-size: 19px; font-weight: 500; letter-spacing: -.01em; line-height: 1.25; }
.chain p { margin-top: 12px; color: var(--ink-2); font-size: 15px; max-width: 30ch; }
.chain[data-reveal]:not(.is-in)::before { transform: scaleX(0); }
.chain[data-reveal] li { transition: opacity .9s var(--ease), transform .9s var(--ease); }
.chain[data-reveal]:not(.is-in) li { opacity: 0; transform: translateY(14px); }
.chain.is-in li:nth-child(2) { transition-delay: .12s; } .chain.is-in li:nth-child(3) { transition-delay: .24s; }
.chain.is-in li:nth-child(4) { transition-delay: .36s; } .chain.is-in li:nth-child(5) { transition-delay: .48s; }

/* photo documentation: numbered plates, ink frame, title strip */
.photos { display: grid; grid-template-columns: repeat(12, 1fr); gap: 56px 24px; counter-reset: pl; }
.ph { margin: 0; counter-increment: pl; border: 1px solid var(--ink); background: var(--paper); padding: 10px; }
.ph img { width: 100%; object-fit: cover; filter: saturate(.8) contrast(1.04); transition: filter .8s var(--ease); }
.ph:hover img { filter: saturate(1) contrast(1.02); }
.ph figcaption { display: grid; grid-template-columns: auto 1fr; gap: 2px 16px; align-items: baseline; padding: 12px 4px 2px; margin-top: 10px; border-top: 1px solid var(--ink); color: var(--ink-2); }
.ph figcaption::before { content: 'F.' counter(pl, decimal-leading-zero); grid-row: span 2; font-size: 13px; font-weight: 600; color: var(--ink); font-stretch: 125%; }
.ph figcaption b { font-size: 15px; font-weight: 500; color: var(--ink); white-space: nowrap; }
.ph figcaption span { font-size: 11px; grid-column: 2; }
.ph--1 { grid-column: 1 / span 8; } .ph--1 img { aspect-ratio: 3 / 2; }
.ph--2 { grid-column: 9 / span 4; align-self: end; } .ph--2 img { aspect-ratio: 4 / 5; }
.ph--3 { grid-column: 1 / span 5; } .ph--3 img { aspect-ratio: 16 / 10; }
.ph--4 { grid-column: 6 / span 4; margin-top: 120px; } .ph--4 img { aspect-ratio: 4 / 3; }
.ph--5 { grid-column: 10 / span 3; margin-top: 40px; } .ph--5 img { aspect-ratio: 3 / 4; }
.ph--6 { grid-column: 5 / span 8; } .ph--6 img { aspect-ratio: 16 / 9; object-position: 30% 50%; }

/* about */
.about { display: grid; grid-template-columns: 7fr 5fr; gap: 96px; align-items: start; }
.about .sec__lede { margin-top: 32px; font-size: 19px; max-width: 48ch; }
.quote { margin: 64px 0 0; padding-top: 28px; border-top: 1px solid var(--ink); }
.quote p { font-size: clamp(2.2rem, 3.8vw, 3.9rem); line-height: 1; letter-spacing: -.035em; font-weight: 350; }
.quote cite { display: block; margin-top: 18px; font-style: normal; color: var(--ink-2); font-size: 14px; }
.rev { width: 100%; border-collapse: collapse; border-top: 1px solid var(--ink); }
.rev caption { text-align: left; padding-bottom: 12px; color: var(--ink-2); }
.rev th { text-align: left; color: var(--ink-3); font-size: 11px; padding: 10px 0; border-bottom: 1px solid var(--rule); }
.rev td { padding: 14px 0; border-bottom: 1px solid var(--rule-2); vertical-align: top; font-size: 15px; }
.rev td:first-child { width: 72px; font-weight: 600; }
.rev td b { font-weight: 600; }

/* compositions table */
.comp { display: grid; gap: 0; border-top: 1px solid var(--ink); }
.cr { display: grid; grid-template-columns: 4fr 8fr; gap: 56px; padding: 40px 0 44px; border-bottom: 1px solid var(--rule); }
.cr h3 { font-size: 24px; font-weight: 400; letter-spacing: -.02em; line-height: 1.15; }
.cr h3 small { display: block; margin-top: 8px; font-size: 14px; color: var(--ink-2); letter-spacing: 0; }
.strip { margin-top: 26px; display: flex; height: 44px; border: 1px solid var(--ink); }
.strip i { display: block; height: 100%; min-width: 2px; position: relative; }
.strip i + i { border-left: 1px solid rgba(21, 24, 27, .45); }
.strip i.is-sel { outline: 2px solid var(--red); outline-offset: -2px; z-index: 1; }
.cr tr[data-l], .strip i { cursor: pointer; -webkit-tap-highlight-color: transparent; }
.cr tr.is-sel td { background: rgba(194, 59, 34, .07); }
.cr tr.is-sel td:nth-child(3) { color: var(--red-deep); }
.cr table { width: 100%; border-collapse: collapse; font-size: 15px; }
.cr th { text-align: left; font-size: 11px; font-weight: 500; font-stretch: 125%; letter-spacing: .13em; text-transform: uppercase; color: var(--ink-3); padding: 0 0 10px; border-bottom: 1px solid var(--rule); }
.cr td { padding: 11px 0; border-bottom: 1px solid var(--rule-2); vertical-align: top; }
.cr td:first-child { width: 40px; color: var(--ink-3); }
.cr td:nth-child(2) { padding-right: 16px; }
.cr td.sw { width: 22px; }
.cr td.sw i { display: block; width: 14px; height: 14px; border: 1px solid rgba(21, 24, 27, .5); margin-top: 4px; }
.cr td:last-child { text-align: right; white-space: nowrap; font-weight: 500; }
.cr tr:hover td { background: rgba(21, 24, 27, .03); }

/* materials */
.mats__list { display: grid; grid-template-columns: repeat(3, 1fr); column-gap: 48px; border-top: 1px solid var(--ink); }
.mats__list div { padding: 16px 0 18px; border-bottom: 1px solid var(--rule-2); }
.mats__list dt { color: var(--ink-3); font-size: 11px; }
.mats__list dd { margin-top: 6px; font-size: 16px; }

/* calculator */
.sec--calc { background: var(--sheet); border-top: 1px solid var(--rule); }
.calc { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 0 88px; }
.calc__head { grid-column: 1 / -1; }
.form { display: grid; gap: 26px; align-content: start; }
.f-group { border: 0; padding: 0; margin: 0; min-width: 0; }
.f-group legend, .field label, .lbl, .range label { color: var(--ink-2); display: block; margin-bottom: 12px; padding: 0; }
.field label i { color: var(--red); font-style: normal; }
.field label small, .lbl small { text-transform: none; letter-spacing: 0; font-stretch: 100%; color: var(--ink-3); font-size: 12px; margin-left: 6px; }
.choice { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--ink); }
.choice--3 { grid-template-columns: repeat(3, 1fr); }
.choice label { position: relative; cursor: pointer; }
.choice label + label { border-left: 1px solid var(--ink); }
.choice input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.choice span { display: block; padding: 14px 16px; min-height: 100%; font-size: 15px; font-weight: 500; line-height: 1.25; transition: background-color .25s, color .25s; }
.choice small { display: block; margin-top: 4px; font-size: 12.5px; font-weight: 400; color: var(--ink-2); transition: color .25s; }
.choice input:checked + span { background: var(--ink); color: var(--paper); }
.choice input:checked + span small { color: var(--on-night-2); }
.choice label:hover input:not(:checked) + span { background: rgba(21, 24, 27, .05); }
.choice input:focus-visible + span { outline: 2px solid var(--red); outline-offset: -4px; }
.f-group[data-house] { display: grid; gap: 24px; }
.f-group[disabled] { opacity: .4; }
.range { display: grid; grid-template-columns: 1fr auto; align-items: baseline; }
.range output { font-size: 28px; font-weight: 400; letter-spacing: -.02em; }
.range input { grid-column: 1 / -1; margin-top: 10px; }
.range .hint { grid-column: 1 / -1; margin-top: 8px; font-size: 13px; color: var(--ink-3); }
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 26px; background: transparent; cursor: pointer; }
input[type=range]::-webkit-slider-runnable-track { height: 1px; background: var(--ink); }
input[type=range]::-moz-range-track { height: 1px; background: var(--ink); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; margin-top: -9px; background: var(--red); border: 3px solid var(--sheet); border-radius: 50%; box-shadow: 0 0 0 1px var(--red); }
input[type=range]::-moz-range-thumb { width: 14px; height: 14px; background: var(--red); border: 3px solid var(--sheet); border-radius: 50%; box-shadow: 0 0 0 1px var(--red); }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.field input[type=text], .field input[type=tel], .field input[type=email], .field select, .field textarea {
  width: 100%; min-height: 52px; padding: 13px 0; border: 0; border-bottom: 1px solid var(--ink); background: transparent; border-radius: 0;
  font-size: 17px; caret-color: var(--red); transition: border-color .25s;
}
.field textarea { resize: vertical; min-height: 110px; }
.field select { -webkit-appearance: none; appearance: none; cursor: pointer; padding-right: 28px; background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%2315181B' stroke-width='1.3'/%3E%3C/svg%3E") right 4px center no-repeat; }
.field ::placeholder { color: var(--ink-3); opacity: 1; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-bottom: 2px solid var(--red); }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { outline: none; }
.field.is-bad input { border-bottom-color: var(--red); }
.err { display: none; margin-top: 8px; font-size: 13.5px; color: var(--red-deep); }
.is-bad .err, .err.is-on { display: block; }
.field .file { text-transform: none; letter-spacing: 0; font-stretch: 100%; color: var(--ink); font-size: 15px; margin: 0; }
.file { display: flex; align-items: center; gap: 16px; padding: 16px 18px; border: 1px dashed var(--ink-3); cursor: pointer; transition: border-color .25s, background-color .25s; position: relative; }
.file:hover { border-color: var(--ink); background: rgba(21, 24, 27, .03); }
.file input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.file:focus-within { outline: 2px solid var(--red); outline-offset: 2px; }
.file__t { font-weight: 500; font-size: 15px; }
.file__t small { display: block; font-weight: 400; color: var(--ink-2); font-size: 13px; margin-top: 2px; }
.file__x { margin-top: 10px; padding: 8px 0; border: 0; background: none; color: var(--red-deep); font-size: 14px; font-weight: 500; text-decoration: underline; text-underline-offset: .22em; cursor: pointer; }
.file__x[hidden] { display: none; }
.plan-slot:empty { display: none; }
.hp { position: absolute; left: -9999px; }
.check { display: grid; grid-template-columns: 22px 1fr; gap: 12px; font-size: 14.5px; color: var(--ink-2); cursor: pointer; align-items: start; }
.check input { width: 18px; height: 18px; margin: 2px 0 0; accent-color: var(--red); }
.form__act { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 28px; margin-top: 8px; }
.form__alt { font-size: 15px; color: var(--ink-2); }
.form__alt a { color: var(--ink); font-weight: 500; }
.form__msg { font-size: 15px; }
.form__msg.is-ok { padding: 22px 24px; border: 1px solid var(--ink); background: var(--paper); }
.form__msg.is-ok b { display: block; font-size: 20px; font-weight: 500; margin-bottom: 4px; color: var(--ink); }
.form__msg.is-err { color: var(--red-deep); }

.plan { position: sticky; top: calc(var(--head) + 32px); align-self: start; border: 1px solid var(--ink); background: var(--paper); }
.plan__svg { width: 100%; height: auto; display: block; }
.plan figcaption { display: flex; justify-content: space-between; gap: 12px; padding: 12px 16px; border-top: 1px solid var(--ink); font-size: 13px; color: var(--ink-2); }
.plan figcaption span:first-child { color: var(--ink); font-weight: 500; }.pl-wall { fill: var(--wool); stroke: var(--ink); stroke-width: 1.2; }
.pl-in { fill: var(--sheet); stroke: var(--ink); stroke-width: .8; }
.pl-dim { fill: none; stroke: var(--ink-2); stroke-width: .8; }
.pl-t { font: 500 12px var(--f); fill: var(--ink-2); }
.pl-big { font: 400 26px var(--f); fill: var(--ink); letter-spacing: -.02em; }
.pl-n { fill: var(--ink); }
.pl-cut { fill: none; stroke: var(--ink); stroke-width: 1.2; stroke-dasharray: 18 5 3 5; }
.pl-a { font: 600 12px var(--f); fill: var(--ink); }
.pl-tri { fill: var(--ink); }
.pl-grid { stroke: rgba(21, 24, 27, .07); stroke-width: 1; }
.plan__svg * { transition: all .5s var(--ease); }

/* footer: the page closes on ink */
.foot { padding: 88px 0 40px; background: var(--ink); color: var(--on-night); }
.foot ::selection { background: var(--red); color: #fff; }
.foot a { color: inherit; text-decoration: none; }
.foot a:hover { text-decoration: underline; text-decoration-color: var(--red); }
.foot__top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(232, 233, 229, .2); }
.foot__brand { display: flex; gap: 16px; align-items: flex-start; }
.foot .brand__mark { width: 42px; height: 42px; stroke: var(--on-night); }
.foot .brand__mark text { fill: var(--on-night); }
.foot__brand b { display: block; margin-bottom: 6px; font-size: 16px; font-weight: 600; font-stretch: 125%; letter-spacing: .16em; text-transform: uppercase; }
.foot__brand p { color: var(--on-night-2); font-size: 15px; line-height: 1.55; }
.foot__call { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.foot__tel { font-size: clamp(2rem, 4vw, 3.4rem); font-weight: 380; letter-spacing: -.03em; line-height: 1; }
.foot__mail { font-size: 17px; color: var(--on-night-2); }
.foot__cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; padding: 40px 0 56px; }
.foot__cols h2 { margin-bottom: 10px; font-size: 11.5px; font-weight: 500; font-stretch: 125%; letter-spacing: .13em; text-transform: uppercase; color: var(--on-night-2); }
.foot__cols p { font-size: 15.5px; line-height: 1.6; }
.foot__bar { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-top: 20px; border-top: 1px solid rgba(232, 233, 229, .2); font-size: 13.5px; color: var(--on-night-2); }

/* phone action bar */
.mbar { display: none; }

/* reveal: blocks settle up, titles rise word by word out of their own line box */
[data-rv] { transition: opacity 1s var(--ease) .12s, transform 1s var(--ease) .12s; }
[data-rv]:not(.is-in) { opacity: 0; transform: translateY(22px); }
[data-split] .w { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: .12em; margin-bottom: -.12em; }
[data-split] .w > span { display: inline-block; transition: transform 1.05s var(--ease), opacity .6s var(--ease); transition-delay: calc(var(--i) * 45ms); }
[data-split]:not(.is-in) .w > span { transform: translateY(108%); opacity: 0; }

/* ============ responsive ============ */
.nav a, .top__cta { white-space: nowrap; }
@media (max-width: 1360px) {
  .nav ul { gap: 20px; }
  .nav a { font-stretch: 100%; letter-spacing: .09em; }
  .nav__tel { display: none; }
}
@media (max-width: 1120px) and (min-width: 960px) {
  .top__cta { display: none; }
}
@media (max-width: 1180px) {
  .spec-sheet { grid-template-columns: 1fr 1fr; }
  .spec-extra { grid-column: 1 / -1; grid-row: auto; border-left: 0; border-top: 1px solid var(--rule); padding-left: 0; }
  .cmp { grid-template-columns: 1fr; }
}
@media (max-width: 959px) {
  :root { --head: 56px; }
  .top__cta { display: none; }
  .menu { display: inline-flex; align-items: center; gap: 10px; border: 1px solid var(--ink); background: transparent; height: 38px; padding: 0 12px; font-size: 13px; font-weight: 500; cursor: pointer; }
  .menu i { width: 16px; height: 7px; border-top: 1px solid currentColor; border-bottom: 1px solid currentColor; transition: transform .3s var(--ease); }
  .menu[aria-expanded="true"] i { transform: scaleY(0); }
  .nav { position: fixed; inset: var(--head) 0 auto 0; flex-direction: column; align-items: stretch; gap: 0; padding: 8px var(--gut) 28px; background: var(--paper); border-bottom: 1px solid var(--ink); transform: translateY(-8px); opacity: 0; visibility: hidden; transition: opacity .3s var(--ease), transform .3s var(--ease), visibility 0s .3s; }
  .nav.is-open { opacity: 1; transform: none; visibility: visible; transition-delay: 0s; }
  .nav ul { flex-direction: column; gap: 0; }
  .nav li a { display: block; padding: 15px 0; border-bottom: 1px solid var(--rule); font-size: 20px; color: var(--ink); }
  .nav__tel { display: block; margin-top: 22px; font-size: 20px; }

  .nav li a { font-size: 15px; }

  /* mobile: no sticky stage; every step carries its own drawing sheet */
  .rez .stage { display: none; }
  .steps { margin-top: 0; }
  .step { min-height: 0; display: block; }
  .step__in { width: auto; padding: 56px var(--gut) 8px; }
  .step--hero .step__in { padding-top: calc(var(--head) + 28px); }
  .hero__title { font-size: clamp(2.3rem, 10.4vw, 3.2rem); line-height: 1; }
  .hero__lede { margin-top: 20px; font-size: 16.5px; }
  .hero__act { margin-top: 24px; flex-direction: column; align-items: stretch; gap: 14px; }
  .hero__act .btn { justify-content: space-between; }
  .hero__act .link { align-self: flex-start; }
  .hero__tb { margin-top: 36px; grid-template-columns: 1fr; }
  .hero__tb div, .hero__tb div + div { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 12px 0; border-left: 0; }
  .hero__tb div + div { border-top: 1px solid var(--rule); }
  .hero__tb dd { margin: 0; text-align: right; }
  .hero__cue { display: none; }
  .panel h2 { font-size: 2rem; }
  .panel__head { gap: 16px; margin-bottom: 0; }
  .seg { align-self: stretch; }
  .seg button { flex: 1; padding: 12px 10px; font-size: 14px; }
  .panel > p:not(.panel__sum) { margin-top: 16px; font-size: 16px; }
  .legend { margin-top: 20px; }
  .legend li { grid-template-columns: 30px 1fr auto; padding: 12px 0; font-size: 15px; cursor: pointer; -webkit-tap-highlight-color: transparent; }
  .legend__val { font-size: 14px; }
  .panel__sum { margin-top: 18px; font-size: 15px; }
  .step--end .step__in { padding-bottom: 24px; }
  .panel--end { padding: 28px 22px; border: 1px solid var(--ink); background: var(--sheet); }
  .panel--end p { margin: 16px 0 24px; }
  .panel--end .btn { width: 100%; justify-content: space-between; }

  .mfig { position: relative; margin: 24px calc(var(--gut) * -1 + 8px) 0; border: 1px solid var(--ink); overflow: hidden;
    background-color: var(--paper); background-image: radial-gradient(rgba(21, 24, 27, .1) 1px, transparent 1.2px); background-size: 20px 20px; }
  .step--hero .mfig { margin-top: 28px; }
  .mfig__svg, .mfig__lead { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
  .mfig__lead { pointer-events: none; }
  .mfig__lead path { fill: none; stroke: var(--ink); stroke-width: .8; }
  .mfig__lead circle { fill: var(--ink); }
  .mfig__lead .ld-c { fill: none; stroke: var(--red); stroke-width: 1; stroke-dasharray: 8 3 2 3; }
  .mfig__ann { position: absolute; inset: 0; }
  .mfig__ann .ann { width: 28px; height: 28px; margin: -14px 0 0 -14px; font-size: 12.5px; cursor: pointer; transition: opacity .5s var(--ease), background-color .2s, color .2s; }
  .mfig__ann .ann--detail { width: auto; height: 44px; margin: -22px 0 0 -22px; }
  .mfig__ann .ann--detail span { display: inline-block; }
  .mfig.is-zooming .mfig__ann, .mfig.is-zooming .mfig__lead { opacity: 0; }
  .mfig__ann, .mfig__lead { transition: opacity .5s var(--ease); }
  .mfig__sc { position: absolute; left: 12px; bottom: 10px; z-index: 2; display: flex; gap: 8px; align-items: center; padding: 5px 8px; background: rgba(246, 247, 244, .92); font-size: 12px; font-weight: 500; color: var(--ink); }
  .mfig__bar { display: block; height: 6px; border: 1px solid var(--ink); border-top: 0; transition: width .3s; }
  .mfig__sc b { font-weight: 600; }
  .mfig__hint { margin-top: 12px; font-size: 13.5px; color: var(--ink-2); display: flex; gap: 10px; align-items: center; }
  .mfig__hint::before { content: ''; width: 18px; height: 1px; background: var(--red); }
  .rez-svg .rt { display: none; }
  .mfig--hero .dims { display: none; }
  .mfig .soil-l { stroke-opacity: .16; }

  body { padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
  .mbar {
    display: grid; grid-template-columns: 1fr 1.7fr; position: fixed; z-index: 60; left: 0; right: 0; bottom: 0;
    padding: 8px 10px calc(8px + env(safe-area-inset-bottom)); gap: 8px; background: var(--paper); border-top: 1px solid var(--ink);
    transition: transform .4s var(--ease);
  }
  .mbar.is-away { transform: translateY(110%); }
  .mbar a { display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; text-decoration: none; font-size: 15px; font-weight: 500; }
  .mbar__tel { border: 1px solid var(--ink); color: var(--ink); }
  .mbar__tel svg { width: 17px; height: 17px; fill: var(--ink); }
  .mbar__cta { background: var(--red); color: #fff; }
  .mbar__cta::after { content: ''; width: 18px; height: 1px; background: currentColor; }

  .sec__head { grid-template-columns: 1fr; }
  .sys { grid-template-columns: 1fr; }
  .sys__item, .sys__item + .sys__item { padding: 32px 0; border-left: 0; }
  .sys__item + .sys__item { border-top: 1px solid var(--rule); }
  .brick { grid-template-columns: 1fr 1fr; }
  .brick__text { grid-column: 1 / -1; }
  .chain { grid-template-columns: 1fr; gap: 0; padding-left: 36px; }
  .chain::before { left: 8px; right: auto; top: 0; bottom: 0; width: 1px; height: auto; transform-origin: top; }
  .chain[data-reveal]:not(.is-in)::before { transform: scaleY(0); }
  .chain li { padding: 0 0 36px; }
  .chain li::before { height: auto; margin-bottom: 6px; }
  .chain li::after { left: -36px; top: 2px; }
  .chain h3 { margin-top: 0; }
  .photos { grid-template-columns: 1fr 1fr; gap: 32px 14px; }
  .ph--1, .ph--3, .ph--6 { grid-column: 1 / -1; }
  .ph--2, .ph--4, .ph--5 { grid-column: auto; margin-top: 0; }
  .ph--4 { grid-column: 1 / -1; }
  .ph { padding: 6px; }
  .plan figcaption { flex-direction: column; gap: 2px; }
  .cmp__svg .cmp__lbl, .cmp__svg .cmp__v, .cmp__svg .cmp__gv { font-size: 28px; }
  .cmp__svg .cmp__lbl { font-size: 24px; letter-spacing: .04em; }
  .cmp__svg { margin-left: 30px; width: calc(100% - 30px); }
  .about { grid-template-columns: 1fr; gap: 64px; }
  .cr { grid-template-columns: 1fr; gap: 24px; }
  .mats__list { grid-template-columns: 1fr 1fr; column-gap: 20px; }
  .calc { grid-template-columns: 1fr; }
  .plan { position: relative; top: 0; order: -1; margin-bottom: 40px; grid-row: 2; }
  .form { grid-row: 3; }
  .choice { grid-template-columns: 1fr 1fr; }
  .choice label:nth-child(3) { border-left: 0; }
  .choice label:nth-child(n+3) { border-top: 1px solid var(--ink); }
  .choice--3 { grid-template-columns: repeat(3, 1fr); }
  .choice--3 label:nth-child(3) { border-left: 1px solid var(--ink); border-top: 0; }
  .f-row { grid-template-columns: 1fr; }
  .foot__top { flex-direction: column; align-items: flex-start; gap: 28px; padding-bottom: 32px; }
  .foot__call { align-items: flex-start; }
  .foot__cols { grid-template-columns: 1fr; gap: 24px; padding: 32px 0 36px; }
}
@media (max-width: 520px) {
  .brand__name { font-size: 13px; letter-spacing: .12em; }
  .mats__list { grid-template-columns: 1fr; }
  .spec-sheet { grid-template-columns: 1fr; }
  .spec-g:nth-child(n) { padding: 24px 0 26px; border-left: 0; }
  .spec-g + .spec-g { border-top: 1px solid var(--rule); }
  .spec div { margin-right: 18px; padding-right: 18px; }
  .spec div + div { padding-left: 18px; }
  .spec dd { font-size: 18px; }
  .legend { columns: 1; }
  .choice span { padding: 12px; font-size: 14px; }
}
/* phones: one column, one idea per row, values read as label → value lines */
@media (max-width: 959px) {
  .sec { padding: 76px 0; }
  .sec__head { gap: 16px; margin-bottom: 40px; }
  .sec__title { font-size: clamp(2rem, 8.8vw, 2.7rem); line-height: 1.04; }
  .sec__lede { font-size: 16.5px; }
  .sys__item h3, .brick__text h3 { font-size: 1.75rem; }
  .sys__item p { font-size: 16px; }
  .spec { grid-template-columns: 1fr; max-width: none; margin-top: 22px; }
  .spec div, .spec div + div { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 12px 0; border-left: 0; }
  .spec div + div { border-top: 1px solid var(--rule-2); }
  .spec dd { margin: 0; font-size: 17px; text-align: right; }
  .cmp { margin-top: 40px; padding: 28px 0 32px; gap: 28px; }
  .cmp__big { font-size: 2.4rem; }
  .brick { margin-top: 72px; gap: 14px; }
  .brick__ph img { aspect-ratio: 4 / 5; }
  .spec-g li { font-size: 15.5px; }
  .chain h3 { font-size: 18px; }
  .chain p { max-width: none; }
  .photos { grid-template-columns: 1fr; gap: 28px; }
  .ph--1, .ph--2, .ph--3, .ph--4, .ph--5, .ph--6 { grid-column: 1; align-self: auto; }
  .ph img, .ph--2 img, .ph--5 img { aspect-ratio: 4 / 3; }
  .about .sec__lede { font-size: 17px; margin-top: 20px; }
  .quote { margin-top: 40px; }
  .quote p { font-size: 2.3rem; }
  .rev td { font-size: 15px; }
  .cr { padding: 32px 0; }
  .cr h3 { font-size: 21px; }
  .cr td { padding: 10px 0; font-size: 14.5px; }
  .mats__list { grid-template-columns: 1fr; }
  .mats__list div { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 13px 0; }
  .mats__list dd { margin: 0; text-align: right; font-size: 15px; }
  .calc__head { margin-bottom: 28px; }
  .plan { margin-bottom: 32px; }
  .form { gap: 24px; }
  .btn--lg { width: 100%; justify-content: space-between; }
  .form__act { flex-direction: column; align-items: stretch; }
  .foot { padding: 64px 0 32px; }

  /* clearer rhythm: alternate grounds, heavy rule on top of every section, the process on ink */
  .sec { border-top: 1px solid var(--ink); }
  #systemy, #o-nas, #materialy { background: var(--paper); }
  #na-kluc, #realizacie, #skladby, #kalkulacia { background: #FBFBF9; }
  .choice--typ { grid-template-columns: 1fr; }
  .choice.choice--typ label:nth-child(n+2) { border-left: 0; border-top: 1px solid var(--ink); }
  .plan-slot .plan { position: relative; top: 0; margin: 6px 0 0; }
  .plan-slot .plan__svg { max-height: 300px; }
  .plan-slot .plan figcaption { padding: 10px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}