/* ============================================================
   Zhero Industrial AI
   Design system — graphite ground, single gold accent,
   engineering-drawing structural vocabulary.
   ============================================================ */

/* ── Tokens ───────────────────────────────────────────────── */
:root {
  color-scheme: dark;

  /* Ground */
  --ink:        #0A0B0D;
  --steel:      #14171B;
  --steel-2:    #1D2127;
  --steel-3:    #272C33;

  /* Line work */
  --rule:       rgba(242, 243, 245, 0.10);
  --rule-firm:  rgba(242, 243, 245, 0.18);
  --rule-faint: rgba(242, 243, 245, 0.05);

  /* Accent — single, load-bearing */
  --gold:       #C5A03F;
  --gold-hi:    #E6C978;
  --gold-dim:   rgba(197, 160, 63, 0.14);
  --gold-line:  rgba(197, 160, 63, 0.32);

  /* Type colour */
  --paper:      #F2F3F5;
  --muted:      #868D96;
  --muted-2:    #5E656E;

  /* Type */
  --display: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --body:    'IBM Plex Sans', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono:    'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Metrics */
  --gutter: 32px;
  --maxw: 1240px;
  --shear: -18deg;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--paper);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; height: auto; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; }

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

:focus-visible {
  outline: 2px solid var(--gold-hi);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Typography ───────────────────────────────────────────── */
.display-1, .display-2, .display-3, h1, h2, h3 {
  font-family: var(--display);
  font-variation-settings: 'wdth' 118, 'wght' 700;
  line-height: 1.02;
  letter-spacing: -0.018em;
  color: var(--paper);
  text-wrap: balance;
}

.display-1, h1 {
  font-size: clamp(2.6rem, 6.4vw, 5rem);
  font-variation-settings: 'wdth' 120, 'wght' 750;
  line-height: 0.98;
  letter-spacing: -0.028em;
}

.display-2, h2 {
  font-size: clamp(1.9rem, 3.5vw, 2.9rem);
  font-variation-settings: 'wdth' 116, 'wght' 720;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.display-3, h3 {
  font-size: clamp(1.2rem, 1.8vw, 1.45rem);
  font-variation-settings: 'wdth' 112, 'wght' 680;
  line-height: 1.18;
  letter-spacing: -0.01em;
}

h4 {
  font-family: var(--body);
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--paper);
}

p { color: var(--muted); }
p strong, .lead strong { color: var(--paper); font-weight: 600; }

.lead {
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.6;
  color: var(--muted);
  max-width: 62ch;
}

.mono {
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.mono-gold { color: var(--gold); }
.txt-paper { color: var(--paper); }
.txt-gold  { color: var(--gold); }

/* Gold underscore used sparingly inside headlines */
.mark {
  color: var(--gold);
  position: relative;
  white-space: nowrap;
}

/* ── Layout ───────────────────────────────────────────────── */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(72px, 9vw, 128px); }
.section--tight { padding-block: clamp(48px, 6vw, 80px); }
.section--steel { background: var(--steel); }
.section--edge  { border-top: 1px solid var(--rule); }

.stack-sm > * + * { margin-top: 12px; }
.stack   > * + * { margin-top: 20px; }
.stack-lg > * + * { margin-top: 32px; }

.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ── Dimension rule — the structural signature ────────────── */
/* A hairline spanning the content width, terminated with ticks,
   carrying a mono label. Marks real section boundaries.        */
.dim {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.dim-label,
.dim-value {
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}

.dim-label { color: var(--gold); }
.dim-value { color: var(--muted-2); }

.dim-line {
  flex: 1 1 auto;
  height: 1px;
  background: var(--rule);
  position: relative;
  min-width: 24px;
}

.dim-line::before,
.dim-line::after {
  content: '';
  position: absolute;
  top: -4px;
  width: 1px;
  height: 9px;
  background: var(--rule-firm);
}

.dim-line::before { left: 0; }
.dim-line::after  { right: 0; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .22s var(--ease), color .22s var(--ease),
              border-color .22s var(--ease), transform .22s var(--ease);
}

.btn-primary {
  background: var(--gold);
  color: var(--ink);
  font-weight: 600;
}
.btn-primary:hover { background: var(--gold-hi); transform: translateY(-1px); }

.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--rule-firm);
}
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }

/* Sheared arrow glyph — derived from the Z-mark */
.btn-arrow {
  width: 14px; height: 1px;
  background: currentColor;
  position: relative;
  flex: none;
  transition: transform .22s var(--ease);
}
.btn-arrow::after {
  content: '';
  position: absolute;
  right: 0; top: -3px;
  width: 7px; height: 7px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
}
.btn:hover .btn-arrow { transform: translateX(3px); }

.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* Text link with a rule underneath */
.link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  padding-bottom: 3px;
  border-bottom: 1px solid var(--gold-line);
  transition: border-color .22s var(--ease), color .22s var(--ease);
}
.link:hover { color: var(--gold-hi); border-color: var(--gold-hi); }

/* ── Header ───────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 11, 13, 0.82);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--rule);
}

.header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 26px; width: auto; }

.brand-name {
  display: block;
  font-family: var(--display);
  font-variation-settings: 'wdth' 122, 'wght' 780;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  line-height: 1;
  color: var(--paper);
}

.brand-sub {
  display: block;
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  line-height: 1;
  margin-top: 4px;
}

.footer .brand-name { font-size: 1.25rem; }
.footer .brand-sub { margin-top: 6px; }

.nav { display: flex; align-items: center; gap: 30px; }

.nav a {
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
  padding-block: 4px;
  transition: color .2s var(--ease);
  position: relative;
}
.nav a:hover { color: var(--paper); }

.nav a[aria-current='page']:not(.btn) { color: var(--paper); }
.nav a[aria-current='page']:not(.btn)::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--gold);
}

/* Specificity guard — .nav a would otherwise beat .btn-primary
   and render the header CTA in muted grey on gold. */
.nav a.btn { padding: 10px 20px; }
.nav a.btn-primary,
.nav a.btn-primary:hover { color: var(--ink); }
.nav a.btn-ghost { color: var(--paper); }
.nav a.btn-ghost:hover { color: var(--gold); }

.burger {
  display: none;
  width: 40px; height: 40px;
  background: none;
  border: 1px solid var(--rule-firm);
  cursor: pointer;
  position: relative;
}
.burger span {
  position: absolute;
  left: 11px;
  width: 16px; height: 1px;
  background: var(--paper);
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.burger span:nth-child(1) { top: 15px; }
.burger span:nth-child(2) { top: 20px; }
.burger span:nth-child(3) { top: 25px; }

.burger[aria-expanded='true'] span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.burger[aria-expanded='true'] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded='true'] span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.mobile-nav {
  display: none;
  border-bottom: 1px solid var(--rule);
  background: var(--ink);
}
.mobile-nav.open { display: block; }
.mobile-nav ul { padding: 8px var(--gutter) 24px; }
.mobile-nav li + li { border-top: 1px solid var(--rule-faint); }
.mobile-nav a {
  display: block;
  padding: 16px 0;
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--paper);
}
.mobile-nav .btn { width: 100%; justify-content: center; margin-top: 18px; }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  padding-block: clamp(64px, 8vw, 108px) clamp(56px, 7vw, 96px);
  overflow: hidden;
}

/* Faint construction grid — the drawing surface */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--rule-faint) 1px, transparent 1px),
    linear-gradient(to bottom, var(--rule-faint) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: radial-gradient(ellipse 90% 70% at 30% 0%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 30% 0%, #000 0%, transparent 75%);
  pointer-events: none;
}

.hero .wrap { position: relative; z-index: 1; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(40px, 5vw, 64px);
  align-items: center;
}

/* Sized so "We didn't study" holds one line in this column —
   an orphaned "study" wrecks the whole opening. */
.hero h1 {
  font-size: clamp(2.4rem, 4.5vw, 4rem);
  margin-block: 22px 24px;
}
.hero .lead { margin-bottom: 34px; }

/* ── Status board — the signature element ─────────────────── */
.board {
  border: 1px solid var(--rule-firm);
  background: linear-gradient(180deg, var(--steel) 0%, #101317 100%);
}

.board-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--rule-firm);
  background: rgba(0, 0, 0, 0.25);
}

.board-title {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--paper);
}

.board-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

/* Sheared pip — echoes the Z-mark */
.pip {
  width: 9px; height: 9px;
  background: var(--gold);
  transform: skewX(var(--shear));
  flex: none;
}
.pip-live { animation: pulse 2.6s var(--ease) infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.35; }
}

.board-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 14px;
  padding: 18px 20px;
  border-top: 1px solid var(--rule-faint);
}
.board-row:first-of-type { border-top: none; }

.board-row .pip { align-self: start; margin-top: 4px; }

.board-sys {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--paper);
}

.board-desc {
  display: block;
  font-family: var(--body);
  font-size: 0.8125rem;
  letter-spacing: 0;
  text-transform: none;
  color: var(--muted);
  margin-top: 5px;
  line-height: 1.45;
}

.board-metric {
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--gold);
  white-space: nowrap;
  text-align: right;
}

.board-metric small {
  display: block;
  font-size: 0.5625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-top: 4px;
}

.board-foot {
  padding: 13px 20px;
  border-top: 1px solid var(--rule-firm);
  background: rgba(0, 0, 0, 0.25);
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted-2);
  line-height: 1.6;
}

/* Board reveal — staggered, like a board refreshing */
.board-row { opacity: 0; transform: translateY(6px); }
.board.revealed .board-row {
  animation: rowIn .5s var(--ease) forwards;
}
.board.revealed .board-row:nth-of-type(1) { animation-delay: .05s; }
.board.revealed .board-row:nth-of-type(2) { animation-delay: .11s; }
.board.revealed .board-row:nth-of-type(3) { animation-delay: .17s; }
.board.revealed .board-row:nth-of-type(4) { animation-delay: .23s; }

@keyframes rowIn {
  to { opacity: 1; transform: none; }
}

/* ── Funding strip ────────────────────────────────────────── */
.strip {
  border-block: 1px solid var(--rule);
  background: var(--steel);
}

.strip-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: stretch;
}

.strip-cell {
  padding: 30px 28px;
  border-left: 1px solid var(--rule);
}
.strip-cell:first-child { border-left: none; }

.strip-figure {
  font-family: var(--display);
  font-variation-settings: 'wdth' 118, 'wght' 740;
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin-bottom: 10px;
}
.strip-cell--accent .strip-figure { color: var(--gold); }

.strip-cell p { font-size: 0.9375rem; line-height: 1.55; }

/* ── Cards ────────────────────────────────────────────────── */
.card {
  padding: 30px 28px;
  background: var(--steel);
  border: 1px solid var(--rule);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.card:hover { border-color: var(--rule-firm); background: var(--steel-2); }

.card h3, .card h4 { margin-bottom: 12px; }
.card p { font-size: 0.9375rem; }

.card-index {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  color: var(--gold);
  display: block;
  margin-bottom: 16px;
}

/* Offer cards */
.offer {
  display: flex;
  flex-direction: column;
  padding: 32px 28px;
  background: var(--steel);
  border: 1px solid var(--rule);
}
.offer--lead {
  border-color: var(--gold-line);
  background: linear-gradient(180deg, rgba(197,160,63,0.06) 0%, var(--steel) 46%);
}

.offer-tag {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 18px;
}
.offer--lead .offer-tag { color: var(--gold); }

.offer-price {
  font-family: var(--display);
  font-variation-settings: 'wdth' 118, 'wght' 740;
  font-size: 2.25rem;
  line-height: 1;
  letter-spacing: -0.025em;
  color: var(--paper);
  margin: 16px 0 6px;
}
.offer--lead .offer-price { color: var(--gold); }

.offer-term {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 22px;
}

.offer p { font-size: 0.9375rem; }
.offer .btn { margin-top: auto; justify-content: center; }

/* Ticked list */
.ticks { margin: 20px 0; }
.ticks li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 11px;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--muted);
}
.ticks li::before {
  content: '';
  position: absolute;
  left: 0; top: 9px;
  width: 8px; height: 8px;
  background: var(--gold);
  transform: skewX(var(--shear));
}
.ticks li strong { color: var(--paper); font-weight: 600; }

/* ── Pillar instrument ────────────────────────────────────── */
.instrument {
  border: 1px solid var(--rule-firm);
  background: var(--steel);
  padding: 34px 30px 26px;
}

.instrument-scale {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  height: 210px;
  align-items: end;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--rule-firm);
}

/* Construction lines at 25 / 50 / 75 % */
.instrument-scale::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to top, var(--rule-faint) 0 1px, transparent 1px 25%
  );
  pointer-events: none;
}

.gauge { position: relative; z-index: 1; text-align: center; }

.gauge-track {
  position: relative;
  height: 190px;
  border: 1px solid var(--rule);
  display: flex;
  align-items: flex-end;
}

.gauge-fill {
  width: 100%;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(197,160,63,0.55) 100%);
  height: 0;
  transition: height 1.1s var(--ease);
}

.gauge-value {
  position: absolute;
  left: 0; right: 0;
  bottom: calc(100% + 8px);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gold);
}

.instrument-labels {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 14px;
}

.instrument-labels span {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: center;
  line-height: 1.4;
}

/* ── Process / stage sequence ─────────────────────────────── */
.stages { border-top: 1px solid var(--rule); }

.stage {
  display: grid;
  grid-template-columns: 96px 1fr 200px;
  gap: 28px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}

.stage-no {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  padding-top: 5px;
}

.stage-body h4 { margin-bottom: 8px; }
.stage-body p { font-size: 0.9375rem; max-width: 62ch; }

.stage-meta {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted-2);
  padding-top: 5px;
  line-height: 1.7;
}
.stage-meta b { color: var(--paper); font-weight: 500; }

/* ── Data table ───────────────────────────────────────────── */
.table-scroll { overflow-x: auto; }

.dtable {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.dtable th {
  font-family: var(--mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  text-align: left;
  padding: 0 20px 12px 0;
  border-bottom: 1px solid var(--rule-firm);
}

.dtable td {
  padding: 18px 20px 18px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.9375rem;
  color: var(--muted);
  vertical-align: top;
}
.dtable td:first-child { color: var(--paper); font-weight: 500; }
.dtable tr:last-child td { border-bottom: none; }

/* ── Eligibility checker ──────────────────────────────────── */
.checker {
  border: 1px solid var(--rule-firm);
  background: var(--steel);
}

.checker-head {
  padding: 22px 28px;
  border-bottom: 1px solid var(--rule-firm);
  background: rgba(0, 0, 0, 0.22);
}

.checker-body { padding: 28px; }

.q + .q { margin-top: 26px; padding-top: 26px; border-top: 1px solid var(--rule-faint); }

.q-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--paper);
  margin-bottom: 6px;
}

.q-help { font-size: 0.875rem; margin-bottom: 14px; }

.q-opts { display: flex; flex-wrap: wrap; gap: 10px; }

.opt {
  padding: 10px 20px;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--rule-firm);
  cursor: pointer;
  transition: all .2s var(--ease);
}
.opt:hover { color: var(--paper); border-color: var(--muted); }
.opt[aria-pressed='true'] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
  font-weight: 600;
}

.verdict {
  margin-top: 28px;
  padding: 24px 26px;
  border: 1px solid var(--gold-line);
  background: var(--gold-dim);
}
.verdict[hidden] { display: none; }
.verdict h4 { margin-bottom: 8px; }
.verdict p { font-size: 0.9375rem; }
.verdict .btn { margin-top: 18px; }
.verdict--warn { border-color: var(--rule-firm); background: var(--steel-2); }

/* ── Forms ────────────────────────────────────────────────── */
.field { margin-bottom: 20px; }

.field label {
  display: block;
  font-family: var(--mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 15px;
  font-family: var(--body);
  font-size: 0.9375rem;
  color: var(--paper);
  background: var(--ink);
  border: 1px solid var(--rule-firm);
  transition: border-color .2s var(--ease);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--gold);
  outline: none;
}

.field textarea { resize: vertical; min-height: 120px; }
.field select { appearance: none; background-image: none; cursor: pointer; }
.field select option { background: var(--ink); }

.field-hint { font-size: 0.8125rem; color: var(--muted-2); margin-top: 7px; }

.hp { position: absolute; left: -9999px; opacity: 0; }

/* ── Quote / disclosure ───────────────────────────────────── */
.note {
  padding: 26px 28px;
  border-left: 2px solid var(--gold);
  background: var(--steel);
}
.note p { font-size: 0.9375rem; }
.note p + p { margin-top: 12px; }

/* ── Profile ──────────────────────────────────────────────── */
.profile {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: clamp(32px, 4vw, 56px);
  align-items: start;
}

.profile-photo {
  border: 1px solid var(--rule-firm);
  filter: grayscale(1) contrast(1.06);
  width: 100%;
}

.creds {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: 24px;
}
.creds div { background: var(--ink); padding: 16px 18px; }
.creds dt {
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 6px;
}
.creds dd { font-size: 0.875rem; color: var(--paper); line-height: 1.4; }

/* ── CTA band ─────────────────────────────────────────────── */
.cta {
  padding: clamp(48px, 6vw, 76px) clamp(28px, 5vw, 64px);
  border: 1px solid var(--gold-line);
  background:
    radial-gradient(ellipse 70% 130% at 88% 50%, rgba(197,160,63,0.10), transparent 70%),
    var(--steel);
}
.cta h2 { margin-bottom: 16px; max-width: 20ch; }
.cta .lead { margin-bottom: 30px; }

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--rule);
  padding-block: 56px 0;
  background: var(--ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 40px;
  padding-bottom: 44px;
}

.footer h5 {
  font-family: var(--mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
}

.footer li { margin-bottom: 10px; }
.footer li a { font-size: 0.875rem; color: var(--muted); transition: color .2s var(--ease); }
.footer li a:hover { color: var(--paper); }
.footer-blurb { font-size: 0.875rem; color: var(--muted); max-width: 42ch; margin-top: 16px; }

/* Title block — an engineering drawing's signature block */
.titleblock {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--rule);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.titleblock div { background: var(--ink); padding: 14px 18px; }
.titleblock dt {
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 5px;
}
.titleblock dd {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--paper);
  line-height: 1.4;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-block: 22px 32px;
}
.footer-legal p {
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted-2);
}

/* ── Page header ──────────────────────────────────────────── */
.pagehead {
  padding-block: clamp(56px, 7vw, 92px) clamp(40px, 5vw, 60px);
  border-bottom: 1px solid var(--rule);
}
.pagehead h1 { margin-block: 20px 22px; max-width: 18ch; }
.pagehead .lead { max-width: 66ch; }

/* ── Reveal on scroll ─────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

/* ── Utilities ────────────────────────────────────────────── */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 12px 20px;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}
.skip:focus { left: 0; }

.narrow { max-width: 780px; }
.mb-0 { margin-bottom: 0; }
.mt-lg { margin-top: 40px; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .profile { grid-template-columns: 220px 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .titleblock { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .nav { display: none; }
  .burger { display: block; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .strip-inner { grid-template-columns: 1fr; }
  .strip-cell { border-left: none; border-top: 1px solid var(--rule); }
  .strip-cell:first-child { border-top: none; }
  .stage { grid-template-columns: 64px 1fr; gap: 18px; }
  .stage-meta { grid-column: 2; padding-top: 12px; }
}

@media (max-width: 860px) {
  /* Comfortable tap targets on touch */
  .footer li { margin-bottom: 2px; }
  .footer li a { display: inline-block; padding-block: 9px; }
}

@media (max-width: 640px) {
  :root { --gutter: 20px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .profile { grid-template-columns: 1fr; }
  .profile-photo { max-width: 240px; }
  .creds { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .titleblock { grid-template-columns: 1fr; }
  .board-row { grid-template-columns: auto 1fr; }
  .board-metric { grid-column: 2; text-align: left; margin-top: 8px; }
  .instrument-scale { gap: 12px; height: 180px; }
  .gauge-track { height: 160px; }
  .instrument-labels { gap: 12px; }
  .instrument-labels span { font-size: 0.5rem; letter-spacing: 0.08em; }
  .btn { width: 100%; justify-content: center; }
  .btn-row .btn { width: auto; flex: 1 1 auto; }
}

/* ── Reduced motion ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .board-row { opacity: 1; transform: none; }
}

/* ── Print ────────────────────────────────────────────────── */
@media print {
  .header, .footer, .burger, .mobile-nav, .btn { display: none !important; }
  body { background: #fff; color: #000; }
  .card, .offer, .board { border-color: #ccc; background: #fff; }
}