:root {
  /* Chrome that used to be tinted. Colour is reserved for the hero, the CTA and
     anything that actually encodes data; everything else reads in ink. */
  --chrome: #1c1c1c;
  --chrome-soft: rgb(0 0 0 / 14%);
  --chrome-fill: rgb(0 0 0 / 5%);

  --nt-blue: var(--mint);
  --nt-blue-soft: var(--mint);
  --nt-ink: #0d0d0f;
  --nt-ink-2: #16161a;
}

/* ---------- HERO ---------- */

.nt-hero {
  padding: 140px 0 96px;
  background: var(--nt-ink);
  text-align: center;
}

.nt-eyebrow {
  display: inline-block;
  margin: 0 0 20px;
  color: var(--nt-blue-soft);
  font-family: var(--font-hand);
  font-size: var(--text-l);
  font-weight: 700;
  transform: rotate(-3deg);
}

.nt-title {
  margin: 0 0 16px;
  color: var(--text-dark-1);
  font-family: var(--font-display);
  font-size: var(--h1);
  font-weight: var(--fw-semibold);
  letter-spacing: -.04em;
  line-height: .92;
}

.nt-tagline {
  margin: 0 auto 24px;
  max-width: 780px;
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.35;
}

.nt-desc {
  max-width: 940px;
  margin: 0 auto;
  color: var(--text-dark-2);
  font-size: var(--text-l);
  line-height: 1.6;
}

.nt-hero-shot {
  display: block;
  width: 100%;
  max-width: 1000px;
  height: auto;
  margin: clamp(38px, 5vw, 60px) auto 0;
}

.nt-hero-caption {
  margin: 16px auto 0;
  max-width: 700px;
  color: #7f8288;
  font-size: var(--text-s);
  line-height: 1.5;
}

/* ---------- shared bits ---------- */

.nt-lede {
  max-width: 900px;
  margin: 0 0 44px;
  color: var(--text-light-2);
  font-size: var(--text-r);
  line-height: 1.7;
}

.nt-lede--tight {
  margin-bottom: 32px;
}

.nt-kicker {
  display: block;
  margin: 0 0 14px;
  color: var(--chrome);
  font-size: var(--text-t);
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}

/* ---------- role / facts ---------- */

.nt-role {
  display: grid;
  align-items: start;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(32px, 4vw, 64px);
}

.nt-role p {
  margin: 0 0 20px;
  color: var(--text-light-2);
  font-size: var(--text-m);
  line-height: 1.7;
}

.nt-role p:last-child {
  margin-bottom: 0;
}

.nt-facts {
  display: grid;
  gap: 0;
  padding: clamp(22px, 2.4vw, 30px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: #fafafa;
}

.nt-facts div {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--border-soft);
}

.nt-facts div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.nt-facts div:first-child {
  padding-top: 0;
}

.nt-facts dt,
.nt-facts b {
  color: var(--text-light-2);
  font-size: var(--text-t);
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.nt-facts span {
  color: var(--text-light-1);
  font-size: var(--text-r);
  font-weight: 600;
  line-height: 1.45;
}

/* ---------- contrast table ---------- */

.nt-contrast {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.nt-contrast-col {
  padding: clamp(22px, 2.4vw, 30px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: #fafafa;
}


.nt-contrast-col h3 {
  margin: 0 0 20px;
  color: var(--text-light-1);
  font-size: var(--text-l);
  line-height: 1.3;
}

.nt-contrast-col ul {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nt-contrast-col li {
  position: relative;
  padding-left: 22px;
  color: var(--text-light-2);
  font-size: var(--text-r);
  line-height: 1.6;
}

.nt-contrast-col li::before {
  position: absolute;
  top: .58em;
  left: 0;
  width: 8px;
  height: 2px;
  border-radius: 2px;
  background: #b9bdc4;
  content: '';
}

.nt-contrast-col--machine li::before {
  background: var(--chrome);
}

/* ---------- numbered principles ---------- */

.nt-principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.nt-principle {
  padding: clamp(24px, 2.4vw, 30px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: #fafafa;
}

.nt-principle b {
  display: block;
  margin-bottom: 14px;
  color: var(--chrome);
  font-family: var(--font-display);
  font-size: var(--h5);
  font-weight: var(--fw-semibold);
  line-height: 1;
}

.nt-principle h3 {
  margin: 0 0 10px;
  color: var(--text-light-1);
  font-size: var(--text-m);
  line-height: 1.3;
}

.nt-principle p {
  margin: 0;
  color: var(--text-light-2);
  font-size: var(--text-r);
  line-height: 1.6;
}

/* ---------- constraints ---------- */

.nt-constraints {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: var(--border-soft);
}

.nt-constraint {
  padding: clamp(22px, 2.4vw, 28px);
  background: #fff;
}

.nt-constraint span {
  display: block;
  margin-bottom: 10px;
  color: var(--chrome);
  font-size: var(--text-t);
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.nt-constraint h3 {
  margin: 0 0 8px;
  color: var(--text-light-1);
  font-size: var(--text-m);
  line-height: 1.3;
}

.nt-constraint p {
  margin: 0;
  color: var(--text-light-2);
  font-size: var(--text-r);
  line-height: 1.6;
}

/* ---------- state colour language ---------- */

.nt-states {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: clamp(14px, 1.6vw, 20px);
  padding: clamp(24px, 2.8vw, 34px);
  border-radius: var(--radius-lg);
  background: var(--nt-ink);
}

.nt-state i {
  display: block;
  width: 100%;
  height: 74px;
  border-radius: 12px;
  background: var(--c);
}

.nt-state b {
  display: block;
  margin: 14px 0 5px;
  color: #fff;
  font-size: var(--text-s);
  font-weight: 700;
}

.nt-state span {
  color: #8a8e95;
  font-size: var(--text-s);
  line-height: 1.5;
}

/* ---------- machine case blocks ---------- */

.nt-case + .nt-case {
  padding-top: clamp(44px, 5vw, 72px);
  border-top: 1px solid var(--border-soft);
}

.nt-case {
  margin-top: clamp(44px, 5vw, 72px);
}

.nt-case-head {
  display: grid;
  align-items: end;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 60px);
  margin-bottom: clamp(26px, 3vw, 38px);
}

.nt-case-head h3 {
  margin: 0;
  color: var(--text-light-1);
  font-family: var(--font-display);
  font-size: var(--h4);
  font-weight: var(--fw-semibold);
  letter-spacing: -.02em;
  line-height: 1.15;
}

.nt-case-head p {
  margin: 0;
  color: var(--text-light-2);
  font-size: var(--text-r);
  line-height: 1.7;
}

.nt-shot {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: #fafafa;
}

.nt-shot--dark {
  border-color: rgb(255 255 255 / 10%);
  background: var(--nt-ink);
}

.nt-shot--pad {
  padding: clamp(14px, 2vw, 30px);
}

.nt-shot img {
  display: block;
  width: 100%;
  height: auto;
}

.nt-shot--narrow img {
  max-width: 380px;
  margin-inline: auto;
}

.nt-notes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 2.6vw, 38px);
  margin-top: clamp(24px, 2.8vw, 34px);
}

.nt-notes div h3,
.nt-notes div h4 {
  margin: 0 0 8px;
  color: var(--text-light-1);
  font-size: var(--text-r);
  line-height: 1.3;
}

.nt-notes div p {
  margin: 0;
  color: var(--text-light-2);
  font-size: var(--text-r);
  line-height: 1.65;
}

.nt-split {
  display: grid;
  align-items: center;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(30px, 4vw, 60px);
}

.nt-split--flip .nt-split-copy {
  order: 2;
}

.nt-split-copy p {
  margin: 0 0 18px;
  color: var(--text-light-2);
  font-size: var(--text-r);
  line-height: 1.7;
}

.nt-split-copy p:last-child {
  margin-bottom: 0;
}

/* ---------- alarm ladder ---------- */

.nt-ladder {
  display: grid;
  gap: 12px;
}

.nt-rung {
  display: grid;
  align-items: start;
  grid-template-columns: 14px 168px minmax(0, 1fr);
  gap: 20px;
  padding: 20px clamp(20px, 2.2vw, 26px);
  border: 1px solid var(--border-soft);
  border-left: 4px solid var(--c);
  border-radius: 14px;
  background: #fafafa;
}

.nt-rung i {
  width: 12px;
  height: 12px;
  margin-top: 5px;
  border-radius: 50%;
  background: var(--c);
}

.nt-rung b {
  color: var(--text-light-1);
  font-size: var(--text-r);
  font-weight: 700;
  line-height: 1.35;
}

.nt-rung p {
  margin: 0;
  color: var(--text-light-2);
  font-size: var(--text-r);
  line-height: 1.6;
}

/* ---------- field testing ---------- */

.nt-field {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.nt-field article {
  padding: clamp(24px, 2.6vw, 32px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: #fafafa;
}

.nt-field h3 {
  margin: 0 0 12px;
  color: var(--text-light-1);
  font-size: var(--text-m);
  line-height: 1.3;
}

.nt-field p {
  margin: 0;
  color: var(--text-light-2);
  font-size: var(--text-r);
  line-height: 1.65;
}

.nt-field-quote {
  margin: 18px 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--chrome);
  color: var(--text-light-1);
  font-size: var(--text-r);
  font-style: italic;
  line-height: 1.6;
}

/* ---------- closing ---------- */

.nt-close {
  padding-bottom: 40px;   /* match the 40px above the heading so the black band is even */
  background: var(--nt-ink);
}


.nt-close .section-title {
  color: #fff;
}

.nt-close-body {
  max-width: 860px;
}

.nt-close-body p {
  margin: 0 0 22px;
  color: var(--text-dark-2);
  font-size: var(--text-r);
  line-height: 1.75;
}

.nt-close-body p:last-child {
  margin-bottom: 0;
}

.nt-close-body strong {
  color: #fff;
  font-weight: 600;
}

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

@media (max-width: 1000px) {
  .nt-role,
  .nt-contrast,
  .nt-case-head,
  .nt-split,
  .nt-field {
    grid-template-columns: minmax(0, 1fr);
  }

  .nt-split--flip .nt-split-copy {
    order: 0;
  }

  .nt-principles,
  .nt-constraints,
  .nt-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .nt-states {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .nt-rung {
    grid-template-columns: 14px minmax(0, 1fr);
    row-gap: 8px;
  }

  .nt-rung p {
    grid-column: 2;
  }
}

@media (max-width: 640px) {
  .nt-hero {
    padding: 120px 0 72px;
  }

  .nt-close {
    padding-bottom: 28px;
  }

  .nt-principles,
  .nt-constraints,
  .nt-notes,
  .nt-states {
    grid-template-columns: minmax(0, 1fr);
  }

  .nt-shot--narrow img {
    max-width: 260px;
  }
}