/* ============================================================
   Pro-Fit Green Energy, Direction C: "Survey"
   Four values plus white. Ink line work on Paper.
   Every figure is set in mono, which is the identity carrier.
   ============================================================ */

:root {
  --ink: #101413;
  --paper: #EDEEEA;
  --hivis: #D8FF3E;
  --graphite: #5A625F;
  --white: #FFFFFF;

  --line: rgba(16, 20, 19, 0.18);
  --line-strong: rgba(16, 20, 19, 0.42);

  --f-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --f-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --f-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --wrap: 1180px;
  --gut: clamp(20px, 4vw, 48px);
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.62;
  font-weight: 400;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0;
}

p { margin: 0 0 1em; }

::selection { background: var(--hivis); color: var(--ink); }

:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}

.on-ink :focus-visible { outline-color: var(--hivis); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--hivis);
  padding: 12px 18px; z-index: 50;
  font-family: var(--f-mono); font-size: 13px;
}
.skip:focus { left: 8px; top: 8px; }

/* ---------- layout ---------- */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-inline: var(--gut);
}

section { padding-block: clamp(48px, 7vw, 92px); }

/* ---------- mono, the identity carrier ---------- */

.mono, .code, .fig, .price, .stat-n, .ref {
  font-family: var(--f-mono);
  font-variant-ligatures: none;
}

.ref {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

.eyebrow, .kicker {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--graphite);
  margin: 0 0 18px;
}

.micro {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--graphite);
}

/* ---------- dimension rule: hairline with end ticks ---------- */

.rule {
  position: relative;
  height: 1px;
  background: var(--line-strong);
  margin: 0;
  border: 0;
}
.rule::before, .rule::after {
  content: "";
  position: absolute;
  top: -4px;
  width: 1px;
  height: 9px;
  background: var(--line-strong);
}
.rule::before { left: 0; }
.rule::after { right: 0; }

.rule-label {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-block: 14px 10px;
}
.rule-label > .mono {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--graphite);
  white-space: nowrap;
}
.rule-label > .rule { flex: 1; }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 15px 24px;
  border: 1.5px solid var(--ink);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: transform 140ms ease, opacity 140ms ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary, .btn-amber {
  background: var(--ink);
  color: var(--hivis);
}
.btn-lg { padding: 18px 30px; font-size: 15px; }
.btn-ghost { background: transparent; color: var(--ink); }

.on-ink .btn { border-color: var(--hivis); color: var(--hivis); }
.on-ink .btn-primary { background: var(--hivis); color: var(--ink); border-color: var(--hivis); }

/* ---------- masthead ---------- */

.masthead {
  border-bottom: 1px solid var(--line-strong);
  background: var(--paper);
}
.masthead .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 78px;
  flex-wrap: wrap;
}
.masthead .logo { height: 34px; width: auto; }
.masthead nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 30px);
  flex-wrap: wrap;
}
.masthead nav a {
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding-block: 6px;
  border-bottom: 1.5px solid transparent;
}
.masthead nav a:hover { border-bottom-color: var(--ink); }
.masthead nav a.tel { color: var(--graphite); }

/* ---------- hero, split and never centred ---------- */

.hero { padding-block: clamp(40px, 6vw, 72px) clamp(48px, 7vw, 88px); }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.hero h1 {
  font-size: clamp(38px, 5.6vw, 68px);
  max-width: 12ch;
  margin-bottom: 22px;
}
.hero .lede {
  font-size: clamp(17px, 1.5vw, 19px);
  max-width: 46ch;
  color: var(--ink);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}
.hero-meta {
  margin-top: 34px;
  display: grid;
  gap: 10px;
}
.hero-meta div {
  display: flex;
  gap: 14px;
  align-items: baseline;
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--graphite);
  border-top: 1px solid var(--line);
  padding-top: 9px;
}
.hero-meta b {
  color: var(--ink);
  font-weight: 600;
  flex: none;
  min-width: 92px;
}

/* ---------- iso diagrams ---------- */

.iso { width: 100%; height: auto; display: block; }
.iso-hero { max-width: 640px; margin-inline: auto; }
.dgm { margin: 0; }
.dgm figcaption {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--graphite);
  border-top: 1px solid var(--line);
  padding-top: 10px;
  margin-top: 6px;
}

.iso-sm { width: 100%; max-width: 210px; height: auto; }

/* ---------- proof strip ---------- */

.proof { border-block: 1px solid var(--line-strong); padding-block: 0; }
.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.proof-grid > div {
  padding: 26px 22px 26px 0;
  border-left: 1px solid var(--line);
  padding-left: 22px;
}
.proof-grid > div:first-child { border-left: 0; padding-left: 0; }
.proof-grid dt {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: 8px;
}
.proof-grid dd {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 500;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}
.proof-grid dd .fig { font-weight: 600; }

/* ---------- spec lines: the package rows ---------- */

.spec-list { display: grid; gap: 0; }

.spec {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr) auto;
  gap: clamp(20px, 4vw, 52px);
  align-items: start;
  padding-block: 34px;
  border-top: 1px solid var(--line-strong);
  position: relative;
}
.spec:last-child { border-bottom: 1px solid var(--line-strong); }

.spec-dgm { align-self: center; }
.spec-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 6px; }
.spec h3 {
  font-size: clamp(21px, 2.2vw, 27px);
  font-weight: 500;
}
.spec-body { min-width: 0; }
.spec-body p { margin-bottom: 14px; max-width: 52ch; color: var(--ink); }

.spec-items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 5px;
}
.spec-items li {
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--graphite);
  padding-left: 20px;
  position: relative;
}
.spec-items li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.62em;
  width: 11px; height: 1px;
  background: var(--line-strong);
}

.spec-price { text-align: right; }
.spec-price .price {
  font-size: clamp(28px, 3.2vw, 38px);
  font-weight: 600;
  letter-spacing: -0.02em;
  display: block;
  line-height: 1;
}
.spec-price .from {
  display: block;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: 8px;
}
.spec-price .vatline {
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--graphite);
  margin-top: 10px;
  display: block;
}
.spec-price .btn { margin-top: 16px; }

.badge {
  display: inline-block;
  background: var(--hivis);
  color: var(--ink);
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 9px;
}

/* ---------- process ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(22px, 3.5vw, 46px);
  list-style: none;
  padding: 0;
  margin: 0;
}
.steps li { border-top: 1.5px solid var(--ink); padding-top: 16px; }
.steps h3 { font-size: 20px; font-weight: 500; margin: 10px 0 8px; }
.steps p { color: var(--graphite); font-size: 15.5px; margin: 0; }
.steps .code {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--graphite);
}

/* ---------- ink panel ---------- */

.on-ink {
  background: var(--ink);
  color: var(--paper);
}
.on-ink h2, .on-ink h3 { color: var(--paper); }
.on-ink .eyebrow, .on-ink .micro { color: rgba(237, 238, 234, 0.62); }
.on-ink .rule, .on-ink .rule::before, .on-ink .rule::after { background: rgba(237, 238, 234, 0.34); }
.on-ink a { color: var(--hivis); }

.vat-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: start;
}
.vat-figure {
  font-family: var(--f-mono);
  font-weight: 600;
  font-size: clamp(46px, 8vw, 92px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--hivis);
}
.vat-grid h2 { font-size: clamp(26px, 3.4vw, 40px); max-width: 18ch; }
.vat-grid p { color: rgba(237, 238, 234, 0.86); max-width: 46ch; }
.vat-dates {
  list-style: none; margin: 22px 0 0; padding: 0;
  display: grid; gap: 0;
}
.vat-dates li {
  display: flex; justify-content: space-between; gap: 20px;
  font-family: var(--f-mono); font-size: 13px;
  padding: 11px 0;
  border-top: 1px solid rgba(237, 238, 234, 0.24);
  color: rgba(237, 238, 234, 0.86);
}
.vat-dates li b { color: var(--hivis); font-weight: 600; }

/* ---------- section headings ---------- */

.sec-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.7fr);
  gap: clamp(20px, 4vw, 56px);
  align-items: end;
  margin-bottom: 34px;
}
.sec-head h2 {
  font-size: clamp(28px, 3.6vw, 44px);
  max-width: 18ch;
}
.sec-head p { color: var(--graphite); margin: 0; max-width: 44ch; }

/* ---------- schedule of works (pricing) ---------- */

.sheet {
  border-top: 1.5px solid var(--ink);
  padding-top: 26px;
  margin-bottom: clamp(48px, 7vw, 84px);
}
.sheet-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: clamp(22px, 4vw, 56px);
  align-items: start;
}
.sheet-head h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 500; margin-bottom: 10px; }
.sheet-head .price { font-size: clamp(30px, 3.4vw, 42px); font-weight: 600; letter-spacing: -0.02em; display: block; line-height: 1; }
.sheet-head .micro {
  display: block;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.sheet-head .ref { display: block; margin-bottom: 10px; }
.sheet-head > div > p:last-child { color: var(--graphite); max-width: 54ch; margin-bottom: 0; }
.sheet-dgm h4 { margin-bottom: 16px; }
.sheet-dgm .micro { display: block; margin-top: 12px; }
.sheet-meta {
  display: grid; gap: 0; margin-top: 20px;
}
.sheet-meta div {
  display: flex; justify-content: space-between; gap: 18px;
  font-family: var(--f-mono); font-size: 13px;
  padding: 9px 0; border-top: 1px solid var(--line);
  color: var(--graphite);
}
.sheet-meta div b { color: var(--ink); font-weight: 600; }

.sheet-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr)) 240px;
  gap: clamp(22px, 4vw, 48px);
  margin-top: 30px;
  align-items: start;
}
.sheet-cols h4 {
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--graphite);
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
}
.sheet-cols ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; }
.sheet-cols li {
  font-size: 14.5px;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
}
.sheet-cols li .n {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--graphite);
}
.excl li { color: var(--graphite); }

/* ---------- footer ---------- */

.site-foot { background: var(--ink); color: rgba(237, 238, 234, 0.8); }
.site-foot .wrap { padding-block: clamp(40px, 6vw, 64px); }
.foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) repeat(2, minmax(0, 0.8fr));
  gap: clamp(24px, 4vw, 56px);
}
.site-foot .logo { height: 30px; width: auto; margin-bottom: 18px; }
.site-foot .micro { color: rgba(237, 238, 234, 0.72); }
.site-foot h3 {
  font-family: var(--f-mono);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(237, 238, 234, 0.55);
  margin-bottom: 14px;
}
.site-foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-foot a { text-decoration: none; }
.site-foot a:hover { text-decoration: underline; }
.foot-note {
  margin-top: clamp(30px, 5vw, 52px);
  padding-top: 20px;
  border-top: 1px solid rgba(237, 238, 234, 0.22);
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.7;
  color: rgba(237, 238, 234, 0.68);
  max-width: 74ch;
}

/* ============================================================
   Quote funnel. Classes are emitted by assets/js/funnel.js,
   which is shared unchanged across all three directions.
   ============================================================ */

.funnel-shell { display: flex; flex-direction: column; min-height: 100vh; }

.f-head { border-bottom: 1px solid var(--line-strong); }
.f-head .wrap { display: flex; align-items: center; gap: 20px; min-height: 72px; flex-wrap: wrap; }
.f-head .brand {
  display: inline-flex; align-items: center; gap: 12px;
  text-decoration: none;
  font-family: var(--f-mono); font-size: 13px;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.f-head .brand-mark { display: inline-block; }
.f-head .brand-mark img { height: 28px; width: auto; }
.f-help { margin: 0 0 0 auto; font-family: var(--f-mono); font-size: 13px; color: var(--graphite); }
.f-help a { color: var(--ink); }

.progress-track {
  position: relative;
  height: 3px;
  background: rgba(16, 20, 19, 0.14);
}
.progress-bar {
  height: 100%;
  width: 0;
  background: var(--ink);
  transition: width 260ms ease;
}
.progress-chip {
  position: absolute;
  top: 10px;
  transform: translateX(-50%);
  white-space: nowrap;
  background: var(--ink);
  color: var(--hivis);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  transition: left 260ms ease;
}

.f-body { flex: 1; padding-block: clamp(46px, 7vw, 78px) clamp(40px, 6vw, 70px); }
.f-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.step-in { animation: stepIn 260ms ease both; }
@keyframes stepIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

.q-title {
  font-size: clamp(28px, 3.8vw, 44px);
  max-width: 20ch;
  margin-bottom: 12px;
}
.q-sub { color: var(--graphite); max-width: 52ch; font-size: 16.5px; }

.opts { display: grid; gap: 10px; margin: 26px 0 8px; max-width: 560px; }
.opt {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  text-align: left;
  background: var(--white);
  border: 1.5px solid var(--line-strong);
  border-radius: 0;
  padding: 16px 18px;
  font-family: var(--f-body);
  font-size: 17px;
  color: var(--ink);
  cursor: pointer;
  transition: transform 130ms ease, border-color 130ms ease;
}
.opt:hover { transform: translateX(3px); border-color: var(--ink); }
.opt .key {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--graphite);
  border: 1px solid var(--line-strong);
  width: 24px; height: 24px;
  display: inline-flex; align-items: center; justify-content: center;
  margin-top: 2px;
}
.opt[aria-pressed="true"] { border-color: var(--ink); box-shadow: inset 0 0 0 2px var(--ink); }
.opt[aria-pressed="true"] .key { background: var(--hivis); border-color: var(--ink); color: var(--ink); }
.opt-sub {
  display: block;
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--graphite);
  margin-top: 4px;
}

.f-label {
  display: block;
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--graphite);
  margin: 26px 0 8px;
}
.f-input {
  display: block;
  width: 100%;
  max-width: 420px;
  background: var(--white);
  border: 1.5px solid var(--line-strong);
  border-radius: 0;
  padding: 15px 16px;
  font-family: var(--f-mono);
  font-size: 18px;
  color: var(--ink);
}
.f-input:focus { border-color: var(--ink); }
.f-hint { font-family: var(--f-mono); font-size: 12px; color: var(--graphite); }
.f-error {
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--ink);
  min-height: 1.4em;
  margin: 8px 0 0;
}
.f-error:not(:empty) {
  border-left: 3px solid var(--ink);
  background: var(--hivis);
  padding: 6px 10px;
  max-width: 420px;
}

.f-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
}
.f-back {
  background: none;
  border: 0;
  border-bottom: 1.5px solid var(--line-strong);
  padding: 4px 0;
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--graphite);
  cursor: pointer;
}
.f-back:hover { color: var(--ink); border-bottom-color: var(--ink); }

.why {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  margin-top: 30px;
  padding: 16px 18px;
  background: var(--white);
  border-left: 3px solid var(--hivis);
  max-width: 560px;
  font-size: 14.5px;
  color: var(--graphite);
}
.why svg { margin-top: 3px; }
.why svg circle, .why svg path { stroke: var(--ink); }

.result-head { margin-bottom: 24px; }
.result-price {
  font-family: var(--f-mono);
  font-size: clamp(46px, 8vw, 84px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 14px;
}

.incl {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  max-width: 560px;
}
.incl li {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 15.5px;
}
.incl .done { font-family: var(--f-mono); font-size: 13px; color: var(--ink); }

.assump {
  margin-top: 28px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  padding: 14px 0;
  max-width: 620px;
}
.assump summary {
  cursor: pointer;
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.assump p { font-size: 14.5px; color: var(--graphite); margin-top: 14px; }

.ac-offer {
  margin-top: 32px;
  background: var(--white);
  border: 1.5px solid var(--line-strong);
  padding: 22px 24px;
  max-width: 620px;
}
.ac-offer h3 { font-size: 19px; font-weight: 500; margin-bottom: 10px; }
.ac-offer p { font-size: 15px; color: var(--graphite); }
.ac-offer label { display: flex; align-items: center; gap: 10px; cursor: pointer; }

/* the running specification */
.rail {
  position: sticky;
  top: 24px;
  background: var(--ink);
  color: var(--paper);
  padding: 24px 24px 20px;
}
.rail::before {
  content: "PF-QUOTE / DRAFT SPECIFICATION";
  display: block;
  font-family: var(--f-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--hivis);
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 1px solid rgba(237, 238, 234, 0.34);
}
.rail .label {
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(237, 238, 234, 0.6);
  margin: 0 0 10px;
}
.rail .figure {
  font-family: var(--f-mono);
  font-weight: 600;
  font-size: 30px;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--hivis);
}
.rail .figure.settling { font-size: 22px; letter-spacing: -0.01em; }
.rail .narrowing {
  font-family: var(--f-mono);
  font-size: 12px;
  color: rgba(237, 238, 234, 0.62);
  margin: 8px 0 16px;
}
.rail ul { list-style: none; margin: 0; padding: 0; }
.rail li {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr) auto;
  gap: 8px;
  align-items: baseline;
  font-family: var(--f-mono);
  font-size: 12.5px;
  padding: 9px 0;
  border-top: 1px solid rgba(237, 238, 234, 0.2);
  color: rgba(237, 238, 234, 0.72);
}
.rail li .done { color: var(--hivis); }
.rail li .v { color: var(--paper); text-align: right; }

.f-foot { border-top: 1px solid var(--line-strong); }
.f-foot .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px clamp(16px, 3vw, 36px);
  padding-block: 20px;
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--graphite);
}

/* ---------- responsive ---------- */

@media (max-width: 1000px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { max-width: 16ch; }
  .f-grid { grid-template-columns: 1fr; }
  .rail { position: static; order: -1; }
  .sheet-head { grid-template-columns: 1fr; }
  .sheet-cols { grid-template-columns: 1fr 1fr; }
  .sheet-cols .sheet-dgm { grid-column: 1 / -1; }
  .vat-grid { grid-template-columns: 1fr; }
  .sec-head { grid-template-columns: 1fr; align-items: start; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
  .proof-grid { grid-template-columns: 1fr 1fr; }
  .proof-grid > div:nth-child(3) { border-left: 0; padding-left: 0; }
  .steps { grid-template-columns: 1fr; }
  .spec {
    grid-template-columns: 150px minmax(0, 1fr);
    row-gap: 22px;
  }
  .spec-price { grid-column: 1 / -1; text-align: left; }
  .spec-price .price { display: inline-block; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .proof-grid { grid-template-columns: 1fr; }
  .proof-grid > div { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  .proof-grid > div:first-child { border-top: 0; }
  .spec { grid-template-columns: 1fr; }
  .spec-dgm { max-width: 240px; }
  .sheet-cols { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .masthead .wrap { min-height: 66px; padding-block: 12px; }
  .masthead nav { margin-left: 0; width: 100%; gap: 16px; }
  .iso-sm { max-width: 240px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .btn:hover, .opt:hover { transform: none; }
}

/* Graphite is a Paper-ground colour. On Ink it measured 2.96:1, so the
   section labels on dark grounds step up to a lighter neutral. */
.ink .mono, .on-ink .mono, section.ink .mono,
.ink .sec-label, .ink .sec-id { color: #9AA29E; }