/* Iskra site. Brand tokens first, then components, then page sections. Flat only: no gradients, shadows or glow. */
:root {
  --charcoal: #1A1C1E;
  --charcoal-2: #262A2E;
  --amber: #F5A623;
  --amber-on-light: #C97E12;
  --steel: #70787E;
  --mist: #E8EAEB;
  --body: #3A4046;
  --paper: #F4F5F6;
  --white: #FFFFFF;
  --border: #DBDEE2;
  --border-dark: #3A3F44;

  --sans: "Geist", Arial, sans-serif;
  --mono: "Geist Mono", Consolas, monospace;

  --wrap: 1180px;
  --gutter: 32px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.55;
  color: var(--body);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { color: var(--charcoal); font-weight: 600; letter-spacing: -0.02em; line-height: 1.08; }

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

/* Dark surfaces */
.dark { background: var(--charcoal); color: #B9BFC4; }
.dark h1, .dark h2, .dark h3 { color: var(--mist); }

/* Nav */
.nav { display: flex; align-items: center; justify-content: space-between; padding-block: 22px; }
.brand { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; font-weight: 600; font-size: 22px; letter-spacing: 0.01em; color: var(--charcoal); }
.dark .brand { color: var(--mist); }
.brand svg { width: 26px; height: 26px; }
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 15px; }
.nav-links a { text-decoration: none; color: var(--steel); }
.nav-links a:hover { color: var(--charcoal); }
.nav-links a.btn-amber, .nav-links a.btn-amber:hover { color: var(--charcoal); }
.dark .nav-links a:hover { color: var(--mist); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font: 500 16px/1 var(--sans);
  padding: 15px 22px; border-radius: 8px; border: 1px solid transparent;
  text-decoration: none; cursor: pointer;
}
.btn-amber { background: var(--amber); color: var(--charcoal); }
.btn-amber:hover { background: #E0961B; }
.btn-line { border-color: var(--border); color: var(--charcoal); background: transparent; }
.dark .btn-line, .btn-line.on-dark { border-color: #565C62; color: var(--mist); }
.dark .btn-line:hover, .btn-line.on-dark:hover { border-color: var(--mist); }
.btn-line:hover { border-color: var(--steel); }
.nav .btn { padding: 11px 16px; font-size: 15px; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--amber); outline-offset: 3px;
}

/* Product window: a plain frame around a real screenshot */
.shot {
  border: 1px solid var(--border-dark);
  border-radius: 10px;
  overflow: hidden;
  background: var(--charcoal);
}
.light .shot, .shot.on-light { border-color: var(--border); }
.shot img { width: 100%; }
.shot.crop { max-height: 460px; }
.shot.crop img { object-fit: cover; object-position: top left; }
/* A tall side panel shown at readable size on a charcoal field */
.shot.panel-crop { max-height: 520px; display: flex; justify-content: center; align-items: flex-start; padding: 28px 28px 0; }
.shot.panel-crop img { width: min(392px, 100%); border: 1px solid var(--border-dark); border-bottom: 0; border-radius: 8px 8px 0 0; }

/* Form */
.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 6px; font-size: 14px; color: var(--steel); }
.form input, .form textarea {
  font: 400 16px/1.4 var(--sans); color: var(--charcoal);
  padding: 13px 14px; border-radius: 8px; border: 1px solid var(--border); background: var(--white);
}
.dark .form input, .dark .form textarea { background: var(--charcoal-2); border-color: var(--border-dark); color: var(--mist); }
.form textarea { min-height: 96px; resize: vertical; }
.role { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; width: fit-content; }
.dark .role { border-color: var(--border-dark); }
.role button { font: 500 15px/1 var(--sans); padding: 12px 16px; border: 0; background: transparent; color: var(--steel); cursor: pointer; }
.role button[aria-pressed="true"] { background: var(--charcoal); color: var(--mist); }
.dark .role button[aria-pressed="true"] { background: var(--mist); color: var(--charcoal); }

/* Footer */
.foot { padding-block: 36px; font-size: 14px; color: var(--steel); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }


@media (max-width: 760px) {
  body { font-size: 17px; }
  :root { --gutter: 20px; }
  .nav-links a:not(.btn) { display: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }


  body { background: var(--charcoal); }
  h2 { font-size: clamp(30px, 3.8vw, 50px); text-wrap: balance; }
  .mono { font-family: var(--mono); }

  /* ---------- hero ---------- */
  .hero { padding-block: 52px 44px; }
  .hero h1 { font-size: clamp(40px, 4.9vw, 70px); line-height: 1.04; max-width: 22ch; text-wrap: balance; }
  .hero p.sub { margin-top: 22px; font-size: 20px; max-width: 70ch; }
  .hero .cta { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }

  /* the stage: a drawing sheet with a dot grid */
  .stage { border-top: 1px solid var(--border-dark); border-bottom: 1px solid var(--border-dark);
    background-image: radial-gradient(#2E3236 1px, transparent 1.2px); background-size: 22px 22px; }
  .stage-grid { display: grid; grid-template-columns: 8fr 4fr; }
  .sheet { padding: 20px 40px 16px 0; border-right: 1px solid var(--border-dark); }
  .sheet svg { width: 100%; height: auto; display: block; overflow: visible; }
  .ln { fill: none; stroke: #A4ABB1; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round;
        stroke-dasharray: 1; stroke-dashoffset: 1; animation: draw 1.1s cubic-bezier(.6,0,.2,1) forwards; animation-delay: calc(var(--i, 0) * 90ms); }
  .eq .ln { fill: var(--charcoal); transition: stroke .25s; }
  .eq.hit .ln { stroke: var(--amber); }
  .dash { fill: none; stroke: #5B6268; stroke-width: 1.2; stroke-dasharray: 3 4; opacity: 0; animation: fade .6s 1.5s forwards; }
  .arrow { fill: #8A9298; opacity: 0; animation: fade .4s 1.4s forwards; }
  .tag { font: 400 11px var(--mono); fill: var(--steel); opacity: 0; animation: fade .6s 1.5s forwards; }
  .tb rect { fill: var(--charcoal); stroke: var(--border-dark); }
  .tb text { font: 400 10px var(--mono); fill: var(--steel); }
  @keyframes draw { to { stroke-dashoffset: 0; } }
  @keyframes fade { to { opacity: 1; } }

  .orders { padding: 20px 0 20px 36px; background: var(--charcoal); }
  .orders .head { display: flex; justify-content: space-between; font: 400 12px var(--mono); color: var(--steel); padding-bottom: 12px; border-bottom: 1px solid var(--border-dark); }
  .orders ul { list-style: none; margin: 0; padding: 0; }
  .orders li { display: grid; grid-template-columns: 64px 1fr auto; align-items: center; gap: 10px; height: 44px; border-bottom: 1px solid var(--border-dark); font: 400 13px var(--mono); color: #B9BFC4; transition: background .3s; }
  .orders li .t { color: var(--steel); }
  .orders li .st { min-width: 92px; text-align: right; color: var(--steel); }
  .orders li[data-last] .st { color: var(--amber); }
  .orders li.hit { background: #22262A; }
  .orders li.hit .st { color: var(--mist); }
  .orders .key { margin-top: 16px; font: 400 12px/1.6 var(--mono); color: var(--steel); }


  /* ---------- drawing to hardware ---------- */
  .built { padding-block: 120px 128px; }
  .built-head { display: grid; grid-template-columns: 7fr 5fr; gap: 72px; align-items: end; }
  .built-head p { font-size: 19px; }
  .scan-grid { display: grid; grid-template-columns: 8fr 4fr; grid-template-rows: 1fr 1fr; gap: 16px; margin-top: 56px; }
  .scan-grid .scan:first-child { grid-row: 1 / 3; }
  .scan { --x: 0; --s: 0; position: relative; overflow: hidden; border-radius: 10px; border: 1px solid var(--border-dark); background: var(--charcoal); aspect-ratio: 16 / 9; }
  .scan-grid .scan:first-child { aspect-ratio: auto; min-height: 100%; }
  .scan video, .scan .still, .scan .pid { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
  .scan video, .scan .still { filter: grayscale(1) contrast(1.08) brightness(.84); }
  .scan .still { opacity: var(--x); filter: grayscale(1) contrast(1.08) brightness(.84) blur(calc((1 - var(--s)) * 22px)); transform: scale(calc(1.06 - var(--s) * .06)); }
  .scan.live .still { opacity: 0; }
  .scan .pid { background: var(--charcoal); opacity: calc(1 - var(--x)); filter: blur(calc(var(--x) * 16px)); }
  .scan.done .pid { display: none; }
  .pid svg { width: 100%; height: 100%; display: block; }
  .pid .ln, .pid .frame, .pid .tb rect, .pid .tb path { fill: none; stroke: #A4ABB1; stroke-width: 2; stroke-linejoin: round; }
  .pid .frame, .pid .tb rect, .pid .tb path { stroke: #4A5056; stroke-width: 1.5; }
  .pid .eq { fill: var(--charcoal); }
  .pid .sig, .pid .tray { fill: none; stroke: #7A8288; stroke-width: 1.5; stroke-dasharray: 6 6; }
  .pid .ah { fill: #A4ABB1; }
  .pid .t, .pid .z, .pid .tb text { font: 13px var(--mono); fill: #8A9298; }
  .pid .tag { font: 500 16px var(--mono); fill: #C9CED2; }
  /* the sheet draws itself in drawing order once the scan starts */
  .pid .ln { stroke-dasharray: 1; stroke-dashoffset: 1; }
  .pid .sig, .pid .tray, .pid .ah, .pid .t, .pid .tag { opacity: 0; }
  .scan.go .pid .ln { animation: draw .7s cubic-bezier(.6,0,.2,1) forwards; animation-delay: calc(var(--i) * 26ms); }
  .scan.go .pid .sig, .scan.go .pid .tray, .scan.go .pid .ah, .scan.go .pid .t, .scan.go .pid .tag { animation: fade .5s forwards; animation-delay: calc(var(--i) * 26ms + 250ms); }
  .scan.fast.go .pid .ln { animation-delay: calc(var(--i) * 16ms); }
  .scan.fast.go .pid .sig, .scan.fast.go .pid .tray, .scan.fast.go .pid .ah, .scan.fast.go .pid .t, .scan.fast.go .pid .tag { animation-delay: calc(var(--i) * 16ms + 200ms); }
  .scan .cap { position: absolute; left: 0; right: 0; bottom: 0; display: flex; justify-content: space-between; padding: 14px 18px; font: 400 12px var(--mono); color: var(--mist); background: rgba(26, 28, 30, .78); }
  .scan .cap .state { color: var(--amber); }


  /* ---------- G: footage hero ---------- */
  .hero-scan { border: 0; border-radius: 0; aspect-ratio: auto; min-height: min(80vh, 780px); display: flex; flex-direction: column; justify-content: flex-end; border-top: 1px solid var(--border-dark); }
  .hero-scan .shade { position: absolute; inset: 0; background: rgba(26, 28, 30, .58); opacity: calc(.4 + .6 * var(--x)); }
  .hero-scan .pid .tb { display: none; }
  .hero-scan .hero-copy { position: relative; width: 100%; padding-block: 120px 40px; }
  .hero-scan h1 { font-size: clamp(42px, 5.8vw, 84px); line-height: 1.02; max-width: 17ch; text-wrap: balance; }
  .hero-scan p.sub { margin-top: 24px; font-size: 20px; max-width: 58ch; color: #D3D7DA; }
  .hero-scan .cta { margin-top: 30px; display: flex; gap: 12px; flex-wrap: wrap; }
  .hero-scan .btn-line { background: rgba(26, 28, 30, .6); }
  .hero-state { position: relative; width: 100%; display: flex; justify-content: space-between; padding-block: 16px; font: 400 12px var(--mono); color: var(--mist); }
  .hero-state::before { content: ""; position: absolute; top: 0; left: var(--gutter); right: var(--gutter); height: 1px; background: rgba(232, 234, 235, .18); }
  .hero-state .state { color: var(--amber); }
  .stage-head { padding-block: 96px 40px; }
  .stage-head h2 { max-width: 22ch; }
  .scan-grid.two { grid-template-columns: 1fr 1fr; grid-template-rows: none; }
  .scan-grid.two .scan:first-child { grid-row: auto; aspect-ratio: 16 / 9; min-height: 0; }

  .scan-note { margin-top: 18px; font: 400 12px var(--mono); color: var(--steel); }
  /* ---------- engineers ---------- */
  .eng { background: var(--paper); padding-block: 128px; }
  .eng .lead { margin-top: 22px; font-size: 20px; max-width: 60ch; }

  .bars { margin-top: 64px; display: grid; gap: 22px; }
  .bar-row { display: grid; grid-template-columns: 110px 1fr; align-items: center; gap: 20px; }
  .bar-row .who { font: 500 14px var(--mono); color: var(--steel); }
  .track { display: flex; align-items: center; gap: 14px; min-width: 0; }
  .bar { display: flex; height: 52px; clip-path: inset(0 100% 0 0); transition: clip-path 1.6s cubic-bezier(.6,0,.2,1); }
  .in .bar { clip-path: inset(0 0 0 0); }
  .bar.today { flex: 1; min-width: 0; }
  .bar.today span { flex: var(--w); display: flex; align-items: center; padding: 0 14px; border: 1px solid #B4BAC0; border-left-width: 0; font-size: 14px; color: var(--body); white-space: nowrap; overflow: hidden; }
  .bar.today span:first-child { border-left-width: 1px; border-radius: 6px 0 0 6px; }
  .bar.today span:last-child { border-radius: 0 6px 6px 0; border-style: dashed; border-left-style: solid; }
  .bar.iskra { white-space: nowrap; background: var(--amber); border-radius: 6px; align-items: center; padding: 0 14px; font-size: 14px; font-weight: 500; color: var(--charcoal); transition-delay: .9s; }
  .track .len { font: 500 15px var(--mono); color: var(--charcoal); }

  .steps { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; margin-top: 112px; }
  .steps::before { content: ""; position: absolute; left: 16px; right: 25%; top: 15px; height: 2px; background: var(--amber); transform: scaleX(0); transform-origin: left; transition: transform 1.6s cubic-bezier(.6,0,.2,1); margin-right: -56px; }
  .steps.in::before { transform: scaleX(1); }
  .steps .dot { position: relative; width: 32px; height: 32px; border-radius: 50%; background: var(--paper); border: 2px solid var(--amber); display: grid; place-items: center; font: 500 14px/1 var(--mono); color: var(--charcoal); transition: background .4s; transition-delay: calc(var(--n) * .4s); }
  .steps.in .dot { background: var(--amber); }
  .steps h3 { font-size: 22px; line-height: 1.2; margin-top: 24px; }
  .steps p { margin-top: 10px; font-size: 16px; }

  .facts { margin-top: 96px; display: grid; grid-template-columns: 4fr 8fr; gap: 56px; border-top: 1px solid var(--border); padding-top: 40px; }
  .facts h3 { font-size: 22px; line-height: 1.25; max-width: 16ch; }
  .facts ul { list-style: none; margin: 0; padding: 0; }
  .facts li { padding-block: 16px; border-bottom: 1px solid var(--border); }
  .facts li:first-child { padding-top: 0; }

  /* ---------- AI ---------- */
  .ai { background: var(--paper); padding-block: 0 128px; }
  .ai-rule { border-top: 1px solid var(--border); }
  .ai-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 72px; align-items: center; padding-top: 112px; }
  .ai .lead { margin-top: 22px; }
  .ai dl { margin: 36px 0 0; }
  .ai dt { font-weight: 600; color: var(--charcoal); margin-top: 20px; }
  .ai dd { margin: 4px 0 0; font-size: 16px; }
  .console { background: var(--charcoal); border-radius: 12px; padding: 28px 32px 32px; min-height: 300px; font: 400 15px/1.6 var(--mono); color: #B9BFC4; }
  .console .bar-t { display: flex; justify-content: space-between; color: var(--steel); font-size: 12px; padding-bottom: 16px; margin-bottom: 24px; border-bottom: 1px solid var(--border-dark); }
  .console .q { color: var(--mist); font-size: 19px; line-height: 1.45; min-height: 84px; }
  .console .q::before { content: "> "; color: var(--amber); }
  .console .q::after { content: ""; display: inline-block; width: 9px; height: 20px; background: var(--amber); margin-left: 4px; vertical-align: -3px; animation: blink 1s steps(1) infinite; }
  .console .a { margin-top: 18px; opacity: 0; transition: opacity .4s; min-height: 52px; }
  .console .a.on { opacity: 1; }
  .console .foot-t { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--border-dark); font-size: 12px; color: var(--steel); }
  @keyframes blink { 50% { opacity: 0; } }

  /* ---------- vendors ---------- */
  .ven { padding-block: 128px; }
  .ven-top { display: grid; grid-template-columns: 7fr 5fr; gap: 72px; align-items: end; }
  .ven .lead { margin-top: 22px; font-size: 20px; max-width: 52ch; }
  .fit { border: 1px solid var(--border-dark); border-radius: 12px; padding: 24px 28px 26px; font: 400 13px var(--mono); color: var(--steel); }
  .fit .cap { display: flex; justify-content: space-between; padding-bottom: 14px; border-bottom: 1px solid var(--border-dark); margin-bottom: 8px; }
  .fit .r { display: grid; grid-template-columns: 96px 1fr; align-items: center; gap: 16px; height: 46px; }
  .fit .range { position: relative; height: 10px; }
  .fit .range::before { content: ""; position: absolute; left: 0; right: 0; top: 4px; height: 1px; background: var(--border-dark); }
  .fit .range i { position: absolute; top: 0; height: 10px; left: var(--from); right: calc(100% - var(--to)); border: 1px solid #8A9298; border-radius: 3px; }
  .fit .range b { position: absolute; top: -6px; width: 2px; height: 22px; background: var(--amber); left: 0; transition: left 1.3s cubic-bezier(.6,0,.2,1); transition-delay: calc(var(--n) * .25s); }
  .fit.in .range b { left: var(--at); }
  .fit .range b::after { content: attr(data-v); position: absolute; top: -20px; left: 50%; transform: translateX(-50%); color: var(--mist); white-space: nowrap; font-size: 12px; }
  .fit .res { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border-dark); color: var(--mist); opacity: 0; transition: opacity .5s 1.9s; }
  .fit.in .res { opacity: 1; }
  .fit .res span { color: var(--amber); }

  .vgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 72px; margin-top: 80px; }
  .vgrid > div { padding-block: 26px; border-top: 1px solid var(--border-dark); }
  .vgrid h3 { font-size: 21px; line-height: 1.25; }
  .vgrid p { margin-top: 8px; font-size: 17px; }
  .ven .btn { margin-top: 48px; }

  /* ---------- team, demo ---------- */
  .team { background: var(--paper); padding-block: 128px; }
  .people { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; margin-top: 48px; }
  .person { display: grid; grid-template-columns: 96px 1fr; gap: 24px; }
  .person img { width: 96px; height: 96px; object-fit: cover; border-radius: 8px; filter: grayscale(1); }
  .person h3 { font-size: 20px; }
  .person .role-t { font: 400 14px/1.4 var(--mono); color: var(--steel); margin-top: 4px; }
  .person p { margin-top: 12px; font-size: 16px; }

  .contact { padding-block: 128px; }
  .contact-grid { display: grid; grid-template-columns: 5fr 6fr; gap: 80px; }
  .contact p.lead { margin-top: 20px; max-width: 40ch; }
  .next { margin: 40px 0 0; padding: 0; list-style: none; font: 400 14px/1.5 var(--mono); color: var(--steel); counter-reset: n; }
  .next li { counter-increment: n; padding-block: 12px; border-top: 1px solid var(--border-dark); display: grid; grid-template-columns: 28px 1fr; }
  .next li::before { content: counter(n); color: var(--amber); }

  @media (max-width: 900px) {
    .built-head, .scan-grid, .scan-grid.two { grid-template-columns: 1fr; } .hero-scan .hero-copy { padding-block: 72px 28px; } .stage-head { padding-block: 64px 28px; } .scan-grid { grid-template-rows: none; } .scan-grid .scan:first-child { grid-row: auto; aspect-ratio: 16 / 9; } .built { padding-block: 72px 80px; } .built-head { gap: 20px; }
    .stage-grid, .steps, .facts, .ai-grid, .ven-top, .vgrid, .people, .contact-grid { grid-template-columns: 1fr; }
    .sheet { padding: 20px 0; border-right: 0; border-bottom: 1px solid var(--border-dark); }
    .orders { padding: 20px 0 24px; }
    .hero { padding-block: 56px 44px; }
    .eng, .ven, .team, .contact { padding-block: 80px; }
    .ai { padding-block: 0 80px; } .ai-grid { padding-top: 72px; gap: 40px; }
    .bar-row { grid-template-columns: 1fr; gap: 8px; }
    .bar.today span { padding: 0 8px; font-size: 12px; }
    .bar.today span:nth-child(2), .bar.today span:nth-child(3) { font-size: 0; }
    .steps { gap: 32px; margin-top: 72px; padding-left: 52px; }
    .steps::before { left: 15px; right: auto; top: 16px; bottom: 70px; width: 2px; height: auto; margin: 0; transform: scaleY(0); transform-origin: top; }
    .steps.in::before { transform: scaleY(1); }
    .steps > div { position: static; }
    .steps .dot { position: absolute; left: 0; }
    .steps h3 { margin-top: 0; padding-top: 3px; }
    .facts { gap: 24px; margin-top: 64px; }
    .console { padding: 22px; }
    .ven-top { gap: 40px; } .vgrid { margin-top: 56px; }
    .contact-grid { gap: 40px; } .people { gap: 36px; }
  }
  @media (prefers-reduced-motion: reduce) {
    .pid .ln, .pid .sig, .pid .tray, .pid .ah, .pid .t, .pid .tag { animation: none !important; stroke-dashoffset: 0; opacity: 1; }
    .ln, .dash, .arrow, .tag { animation: none; stroke-dashoffset: 0; opacity: 1; }
    .bar, .steps::before, .fit .range b, .fit .res { transition: none; }
    .console .q::after { animation: none; }
  }

  /* ---------- multi-page additions ---------- */
  .nav-links a[aria-current="page"] { color: var(--mist); }
  .page-top { padding-block: 72px 88px; }
  .page-top .kicker { font: 500 14px/1 var(--mono); color: var(--amber); margin-bottom: 22px; }
  .page-top h1 { font-size: clamp(38px, 5vw, 72px); line-height: 1.04; max-width: 18ch; text-wrap: balance; }
  .page-top p { margin-top: 24px; font-size: 20px; max-width: 60ch; }
  .page-top .cta { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }

  .band { background: var(--paper); padding-block: 112px; }
  .band + .band { padding-top: 0; }
  .band .lead { margin-top: 22px; font-size: 20px; max-width: 60ch; }
  .rule-top { position: relative; padding-top: 112px; }
  .rule-top::before { content: ""; position: absolute; top: 0; left: var(--gutter); right: var(--gutter); height: 1px; background: var(--border); }

  .how { margin-top: 56px; border-top: 1px solid var(--border); }
  .how li { display: grid; grid-template-columns: 56px 4fr 7fr; gap: 24px; padding-block: 22px; border-bottom: 1px solid var(--border); align-items: baseline; }
  .how { list-style: none; padding: 0; }
  .how .n { font: 500 14px var(--mono); color: var(--amber-on-light); }
  .how h3 { font-size: 21px; }
  .how p { font-size: 17px; }
  .more { display: inline-block; margin-top: 32px; font-weight: 500; color: var(--charcoal); text-underline-offset: 5px; text-decoration-color: var(--amber); text-decoration-thickness: 2px; }
  .dark .more { color: var(--mist); }

  .ai-line { font-size: clamp(22px, 2.4vw, 30px); line-height: 1.35; font-weight: 500; color: var(--charcoal); letter-spacing: -0.015em; max-width: 38ch; }

  .strip { display: grid; grid-template-columns: 4fr 8fr; gap: 56px; align-items: start; }
  .strip h2 { font-size: clamp(26px, 2.8vw, 36px); }
  .strip-people { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
  .strip-people > div { display: grid; grid-template-columns: 72px 1fr; gap: 18px; align-items: start; }
  .strip-people img { width: 72px; height: 72px; object-fit: cover; object-position: center 20%; border-radius: 8px; filter: grayscale(1); }
  .strip-people h3 { font-size: 18px; }
  .strip-people p { margin-top: 4px; font-size: 15px; line-height: 1.5; }

  .closer { padding-block: 112px; }
  .closer h2 { max-width: 20ch; }
  .closer p { margin-top: 20px; font-size: 20px; max-width: 52ch; }
  .closer .cta { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }

  .note { display: grid; grid-template-columns: 4fr 8fr; gap: 56px; }
  .note h2 { font-size: clamp(26px, 2.8vw, 36px); }
  .note-body p { font-size: clamp(20px, 1.9vw, 24px); line-height: 1.5; color: var(--charcoal); max-width: 34em; }
  .note-body p + p { margin-top: 18px; }
  .note-body .sig { margin-top: 28px; font: 400 14px var(--mono); color: var(--steel); }

  .bios { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; }
  .bio img { width: 168px; aspect-ratio: 1 / 1; object-fit: cover; object-position: center 20%; border-radius: 10px; filter: grayscale(1) contrast(1.04); background: var(--border); }
  .bio h3 { font-size: 26px; margin-top: 24px; }
  .bio .role-t { font: 400 14px/1.4 var(--mono); color: var(--steel); margin-top: 6px; }
  .bio p { margin-top: 16px; font-size: 17px; }
  .bio .links { margin-top: 18px; display: flex; gap: 20px; font: 400 14px var(--mono); }
  .bio .links a { color: var(--charcoal); text-underline-offset: 4px; text-decoration-color: var(--amber); }
  .where { margin-top: 72px; padding-top: 28px; border-top: 1px solid var(--border); font: 400 14px var(--mono); color: var(--steel); }

  .data { display: grid; grid-template-columns: 4fr 8fr; gap: 56px; margin-top: 96px; padding-top: 40px; border-top: 1px solid var(--border-dark); }
  .data h3 { font-size: 22px; line-height: 1.25; max-width: 16ch; }
  .data ul { list-style: none; margin: 0; padding: 0; }
  .data li { padding-block: 16px; border-bottom: 1px solid var(--border-dark); }
  .data li:first-child { padding-top: 0; }

  .people-rows { background: var(--paper); }
  .prow { display: grid; grid-template-columns: 360px 1fr; gap: 80px; padding-block: 80px; align-items: start; }
  .prow + .prow { border-top: 1px solid var(--border); }
  .prow img { width: 360px; aspect-ratio: 4 / 5; object-fit: cover; object-position: center 20%; border-radius: 10px; filter: grayscale(1) contrast(1.04); background: var(--border); }
  .prow h2 { font-size: 32px; }
  .prow .meta { font: 400 14px/1.5 var(--mono); color: var(--steel); margin-top: 8px; }
  .prow .meta + .meta { margin-top: 2px; }
  .prow p { margin-top: 24px; font-size: 18px; line-height: 1.6; max-width: 62ch; }
  .prow .links { margin-top: 24px; display: flex; gap: 24px; font: 400 14px var(--mono); }
  .prow .links a { color: var(--charcoal); text-underline-offset: 4px; text-decoration-color: var(--amber); }
  .note-body p { font-size: 20px !important; }
  @media (max-width: 900px) {
    .prow { grid-template-columns: 1fr; gap: 28px; padding-block: 48px; }
    .prow img { width: 100%; max-width: 320px; }
    .prow h2 { font-size: 26px; } .prow p { font-size: 17px; }
  }

  @media (max-width: 900px) {
    .nav { flex-wrap: wrap; row-gap: 14px; }
    .nav-links { gap: 18px; }
    .nav-links a:not(.btn) { display: inline; }
    .how li { grid-template-columns: 32px 1fr; } .how li p { grid-column: 2; }
    .strip, .strip-people, .note, .bios, .data { grid-template-columns: 1fr; }
    .strip, .note, .data { gap: 28px; } .bios { gap: 56px; }
    .page-top { padding-block: 48px 56px; }
    .band, .closer { padding-block: 72px; } .rule-top { padding-top: 72px; }
  }

  /* ---------- production overrides ---------- */
  .skip { position: absolute; left: -9999px; top: 0; background: var(--amber); color: var(--charcoal); padding: 10px 14px; z-index: 10; }
  .skip:focus { left: 12px; top: 12px; }
  .foot a { color: inherit; text-underline-offset: 3px; }

  /* P&ID to hardware: softer hand-overs between the four stages */
  .scan { --x1: 0; --x: 0; --s: 0; }
  .scan video, .scan .still { filter: contrast(1.08) brightness(.84); }
  /* The P&ID holds most of its strength until the still is well up, so the frame never dips dark. */
  .scan .pid { opacity: calc(1 - var(--x1)); filter: blur(calc(var(--x1) * 6px)); }
  .hero-scan .pid { background: transparent; }
  .hero-scan .pid .eq { fill-opacity: calc(1 - var(--x)); }   /* vessel fills fade with the rising still, so they never read as holes */   /* the blurred still can be seen rising behind the lines */
  .scan .still { opacity: var(--x); filter: contrast(1.08) brightness(calc(.905 + (1 - var(--s)) * .14)) blur(calc((1 - var(--s)) * 24px)); transform: scale(calc(1.08 - var(--s) * .08)); }
  .scan.live .still { opacity: 0; transition: opacity .5s ease-out; }
  .scan video { opacity: 0; transition: opacity .2s; }
  .scan.done video { opacity: 1; }
  .scan.live video { animation: drift 26s ease-in-out infinite alternate; }
  @keyframes drift { to { transform: scale(1.05); } }
  .hero-scan .shade { opacity: calc(.7 + .3 * var(--x)); }

  .form .sent { font-size: 20px; color: var(--mist); }
  #demo-note { font-size: 14px; color: var(--steel); }
  #demo-note.err { color: #E0817E; }
  #demo-note a { color: var(--mist); }

  @media (prefers-reduced-motion: reduce) {
    .scan.live video { animation: none; }
  }

  .kicker { font: 500 14px/1 var(--mono); color: var(--amber); margin-bottom: 22px; }
  .ven h1 { font-size: clamp(38px, 5vw, 72px); line-height: 1.04; text-wrap: balance; }
  .h1-team { font-size: clamp(34px, 4vw, 56px) !important; max-width: 22ch !important; }
  .h1-demo { font-size: clamp(38px, 5vw, 72px); line-height: 1.04; }

  /* ---------- review round 1 ---------- */
  /* Steel is lightened on charcoal and darkened on paper so small text passes AA (4.5:1). */
  :root { --steel: #5C646A; --amber-text: #9A5F08; }
  .dark, .console, .scan, .stage, .orders { --steel: #949CA2; }
  .how .n { color: var(--amber-text); }

  .btn { white-space: nowrap; }
  .foot a[href^="mailto"] { white-space: nowrap; }
  .hero-scan .pid .t, .hero-scan .pid .z { display: none; }        /* small labels would run through the headline */
  .scan video { transition: opacity .2s, filter .9s ease-out; }
  .scan.seam video { filter: contrast(1.08) brightness(.84) blur(18px); transition: filter .6s ease-in; }
  .hero-state { justify-content: flex-start; }
  .ai-line { max-width: 46ch; }
  .fit .r { grid-template-columns: 120px 1fr; }
  .console .q { min-height: 56px; }
  .bar.today span { padding: 0 10px; }
  .how li { grid-template-columns: 56px 1fr; }
  .vgrid h2 { font-size: 21px; line-height: 1.25; }
  .data h2 { font-size: 22px; line-height: 1.25; max-width: 16ch; }
  .form [aria-invalid="true"] { border-color: #E0817E; }
  .form .sent:focus { outline: none; }

  /* Without JavaScript nothing starts hidden: bars are drawn, stills are sharp, the fit diagram is in place. */
  html:not(.js) .bar { clip-path: none; }
  html:not(.js) .steps::before { transform: none; }
  html:not(.js) .scan .still { opacity: 1; filter: contrast(1.08) brightness(.84); transform: none; }
  html:not(.js) .scan .pid, html:not(.js) .scan video { display: none; }
  html:not(.js) .hero-scan .shade { opacity: 1; }
  html:not(.js) .fit .range b { left: var(--at); }
  html:not(.js) .fit .res { opacity: 1; }
  html:not(.js) .stage .ln { stroke-dashoffset: 0; animation: none; }
  html:not(.js) .stage .dash, html:not(.js) .stage .arrow, html:not(.js) .stage .tag { opacity: 1; animation: none; }

  @media (max-width: 900px) {
    .nav-links { gap: 14px; font-size: 14px; }
    .nav .btn { padding: 10px 12px; font-size: 14px; }
    /* On a phone the "Today" bar becomes a stack of rows, so every label is readable. */
    .bar.today { flex-direction: column; height: auto; width: 100%; }
    .bar.today span, .bar.today span:nth-child(2), .bar.today span:nth-child(3) { flex: none; height: 38px; font-size: 14px; border: 1px solid #B4BAC0; border-top-width: 0; border-radius: 0; }
    .bar.today span:first-child { border-top-width: 1px; border-radius: 6px 6px 0 0; }
    .bar.today span:last-child { border-radius: 0 0 6px 6px; border-style: dashed; border-top-style: solid; }
    .track { flex-direction: column; align-items: flex-start; gap: 8px; }
    .bar.iskra { height: 38px; }
    .ven { padding-top: 48px !important; }
    .contact { padding-top: 48px !important; }
    .sheet .tag, .sheet .tb { display: none; }                     /* tags are unreadable at phone size */
  }
  @media (max-width: 420px) {
    .nav-links a[href="index.html"] { display: none; }             /* the logo already links home */
  }
  @media (prefers-reduced-motion: reduce) {
    .scan .still, .scan video, .steps .dot, .orders li, .bar, .fit .range b, .fit .res { transition: none !important; }
  }

  /* ---------- review round 2 ---------- */
  .hero-scan .shade { transition: background .6s ease; }
  .hero-scan.seam .shade { background: rgba(26, 28, 30, .7); }
  @media (max-width: 900px) { .nav-links a:not(.btn) { padding-block: 10px; } }

  /* ---------- page-by-page edits, 2026-09-20 ---------- */
  /* industries as a ruled mono grid */
  .verticals { list-style: none; margin: 40px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--border-dark); border-left: 1px solid var(--border-dark); font: 400 13px var(--mono); color: #B9BFC4; }
  .verticals li { padding: 14px 16px; border-right: 1px solid var(--border-dark); border-bottom: 1px solid var(--border-dark); }
  .verticals + .scan-grid { margin-top: 40px; }

  /* home team strip: two people, whole portraits */
  .duo { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 40px; }
  .duo-card { display: grid; grid-template-columns: 112px 1fr; gap: 24px; align-items: center; padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: var(--white); text-decoration: none; color: inherit; }
  .duo-card:hover { border-color: var(--steel); }
  .duo-card img { width: 112px; height: 140px; object-fit: cover; object-position: center top; border-radius: 8px; filter: grayscale(1) contrast(1.04); }
  .duo-card h3 { font-size: 21px; }
  .duo-card .meta { font: 400 13px/1.4 var(--mono); color: var(--steel); margin-top: 4px; }
  .duo-card p { margin-top: 10px; font-size: 16px; line-height: 1.5; }
  .prow img, .bio img { object-position: center top; }

  /* the Iskra mark on every "ask for a demo" band, over a drawing-sheet dot grid */
  .mark { display: block; width: 56px; height: 56px; margin: 0 0 20px -8px; }
  .mark-lg { width: 72px; height: 72px; margin-left: -10px; }
  .closer { background-image: radial-gradient(#2E3236 1px, transparent 1.2px); background-size: 22px 22px; }

  /* title-block strip, as on an engineering drawing */
  .ds-head { display: grid; grid-template-columns: 1.2fr 2fr 1fr; border: 1px solid var(--border-dark); font: 400 12px var(--mono); color: var(--steel); }
  .ds-head > span { padding: 10px 14px; display: flex; align-items: center; gap: 6px; }
  .ds-head > span + span { border-left: 1px solid var(--border-dark); }
  .ds-head > span:last-child { justify-content: flex-end; }
  .ds-mark { color: var(--mist); font: 600 15px var(--sans) !important; }
  .ds-mark .mark { width: 18px; height: 18px; margin: 0; }

  /* vendor data terms as a datasheet */
  .datasheet { margin-top: 96px; border: 1px solid var(--border-dark); border-radius: 12px; overflow: hidden; background: #202326; }
  .datasheet .ds-head { border: 0; border-bottom: 1px solid var(--border-dark); }
  .datasheet h2 { font-size: clamp(24px, 2.6vw, 32px); padding: 32px 32px 8px; }
  .datasheet dl { margin: 0; padding: 8px 32px 28px; }
  .datasheet dl > div { display: grid; grid-template-columns: 180px 1fr; gap: 24px; padding-block: 18px; border-top: 1px solid var(--border-dark); align-items: baseline; }
  .datasheet dl > div:first-child { border-top: 0; }
  .datasheet dt { font: 500 13px var(--mono); color: var(--amber); }
  .datasheet dd { margin: 0; color: var(--mist); font-size: 18px; }

  /* demo form inside a drawing-sheet frame */
  .sheet-frame { border: 1px solid var(--border-dark); border-radius: 12px; overflow: hidden; background: #202326; }
  .sheet-frame .form { padding: 28px 28px 24px; }
  .sheet-frame .ds-foot { border: 0; border-top: 1px solid var(--border-dark); }
  .contact { background-image: radial-gradient(#2E3236 1px, transparent 1.2px); background-size: 22px 22px; }

  @media (max-width: 900px) {
    .verticals { grid-template-columns: repeat(2, 1fr); }
    .duo { grid-template-columns: 1fr; }
    .duo-card { grid-template-columns: 88px 1fr; gap: 16px; padding: 16px; }
    .duo-card img { width: 88px; height: 110px; }
    .datasheet { margin-top: 64px; }
    .datasheet h2, .datasheet dl { padding-inline: 20px; }
    .datasheet dl > div { grid-template-columns: 1fr; gap: 6px; }
    .ds-head { grid-template-columns: 1fr 1fr; }
    .ds-head > span:last-child { display: none; }
    .sheet-frame .form { padding: 20px; }
  }

  /* ---------- review round 4 polish ---------- */
  .duo-card { align-items: start; }
  .datasheet, .sheet-frame { background: var(--charcoal-2); border-radius: 6px; }
  .datasheet dt { color: var(--steel); }                 /* the title-block spark carries the amber */
  .verticals li { display: flex; align-items: center; min-height: 46px; }
  @media (max-width: 900px) {
    .mark-lg { width: 40px; height: 40px; margin-left: -6px; }
    .foot a { display: inline-block; padding-block: 8px; }
  }