/* PNBMARTZ LTD - pnbmartz.store
   Despatch-desk sheet. Two-column ledger, rule-stack texture, split-flap board.
   All wiring is data-pnb-*; only three ids exist on the site and each is a widget root. */

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

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

body, h1, h2, h3, h4, p, ul, ol, dl, dd, dt, figure, address, blockquote { margin: 0; }

ul[class], ol[class] { list-style: none; padding: 0; }

img, svg { display: block; max-inline-size: 100%; }

button, input, select { font: inherit; color: inherit; }

summary { display: block; list-style: none; cursor: pointer; }
summary::-webkit-details-marker { display: none; }

/* board digits, and every figure the sheets print: fixed width, slashed zero */
.pnb-flap,
.pnb-stamp,
.pnb-out__sum,
.pnb-out__fig,
.pnb-spec__val,
[data-pnb-digits] {
  font-variant-numeric: tabular-nums lining-nums slashed-zero;
  font-feature-settings: "tnum" 1, "lnum" 1, "zero" 1;
}

/* ------------------------------------------------------------------ tokens */
:root {
  /* the board is dark, so the native date, time and number controls must be too */
  color-scheme: dark;

  --pnb-bg: #1c1a16;
  --pnb-ink: #f0ece2;
  --pnb-accent: #c96a2b;
  --pnb-accent2: #5d7f8a;
  --pnb-surface: #272420;

  --pnb-rule: color-mix(in srgb, var(--pnb-ink) 17%, transparent);
  --pnb-edge: color-mix(in srgb, var(--pnb-ink) 30%, transparent);
  --pnb-dim: color-mix(in srgb, var(--pnb-ink) 68%, transparent);
  --pnb-well: color-mix(in srgb, var(--pnb-bg) 70%, #000000);
  --pnb-warm: color-mix(in srgb, var(--pnb-accent) 68%, var(--pnb-ink));
  --pnb-cool: color-mix(in srgb, var(--pnb-accent2) 72%, var(--pnb-ink));

  --pnb-display: "Oxanium", "Trebuchet MS", system-ui, sans-serif;
  --pnb-body: "Golos Text", "Segoe UI", system-ui, sans-serif;

  --pnb-flap-h: clamp(1.95rem, 6.6vw, 2.6rem);
  --pnb-flap-w: 1.75rem;
  --pnb-gutter: clamp(1rem, 4vw, 2.5rem);
  --pnb-stack: repeating-linear-gradient(to bottom,
      var(--pnb-rule) 0 1px, transparent 1px 6px);
  --pnb-stack-wide: repeating-linear-gradient(to bottom,
      var(--pnb-rule) 0 1px, transparent 1px 11px);
}

/* ------------------------------------------------------------------ page */
body {
  background: var(--pnb-bg);
  color: var(--pnb-ink);
  font-family: var(--pnb-body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.07rem);
  line-height: 1.62;
  min-block-size: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--pnb-display);
  font-weight: 600;
  line-height: 1.14;
}

h1 { font-size: clamp(1.8rem, 1.3rem + 2.4vw, 3rem); }
h2 { font-size: clamp(1.32rem, 1.1rem + 1.1vw, 1.9rem); }
h3 { font-size: clamp(1.04rem, 0.98rem + 0.35vw, 1.18rem); }
h4 { font-size: 0.94rem; }

p + p { margin-block-start: 0.85em; }

a {
  color: var(--pnb-warm);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: var(--pnb-edge);
  transition: color 170ms ease, text-decoration-color 170ms ease;
}

a:hover { color: var(--pnb-ink); text-decoration-color: var(--pnb-accent); }

:focus-visible {
  outline: 2px solid var(--pnb-accent);
  outline-offset: 2px;
}

.pnb-vh {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.pnb-wrap {
  max-inline-size: 74rem;
  margin-inline: auto;
  padding-inline: var(--pnb-gutter);
}

.pnb-eyebrow {
  font-family: var(--pnb-display);
  font-size: 0.78rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.17em;
  color: var(--pnb-cool);
}

.pnb-eyebrow--warm { color: var(--pnb-warm); }

.pnb-rulestack {
  block-size: 1.4rem;
  background-image: var(--pnb-stack);
  margin-block: 1.1rem;
}

.pnb-rulestack--tall { block-size: 2.7rem; background-image: var(--pnb-stack-wide); }

.pnb-note {
  font-size: 0.86rem;
  color: var(--pnb-dim);
  border-inline-start: 2px solid var(--pnb-rule);
  padding-inline-start: 0.8rem;
}

.pnb-lead { font-size: 1.08em; }

/* ------------------------------------------------------------------ header and the full-sheet nav */
.pnb-head {
  position: sticky;
  inset-block-start: 0;
  z-index: 30;
  background: var(--pnb-bg);
  border-block-end: 1px solid var(--pnb-rule);
}

.pnb-head__bar {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  min-block-size: 3.6rem;
  flex-wrap: wrap;
}

.pnb-head__mark {
  font-family: var(--pnb-display);
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--pnb-ink);
}

.pnb-head__id {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-inline-end: auto;
}

[inert] { cursor: default; }

.pnb-head__mark span { color: var(--pnb-dim); }
.pnb-head__mark:hover { color: var(--pnb-warm); }

.pnb-head__where {
  font-size: 0.72rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.14em;
  color: var(--pnb-dim);
}

.pnb-sheet__tab {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--pnb-display);
  font-size: 0.78rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.16em;
  padding: 0.42rem 0.72rem;
  border: 1px solid var(--pnb-edge);
  background: var(--pnb-surface);
  color: var(--pnb-ink);
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.pnb-sheet__tab:hover { background: var(--pnb-well); border-color: var(--pnb-accent); }

.pnb-sheet__glyph { inline-size: 1.1rem; block-size: 1.1rem; flex: none; }
.pnb-sheet__glyph line { stroke: var(--pnb-accent); stroke-width: 1.7; }
.pnb-sheet__glyph rect { fill: none; stroke: var(--pnb-edge); stroke-width: 1.2; }

.pnb-sheet__word--open { display: none; }
.pnb-sheet[open] .pnb-sheet__word--shut { display: none; }
.pnb-sheet[open] .pnb-sheet__word--open { display: inline; }

.pnb-sheet[open] .pnb-sheet__tab {
  position: fixed;
  inset-block-start: 0.85rem;
  inset-inline-end: var(--pnb-gutter);
  z-index: 60;
  border-color: var(--pnb-accent);
  background: var(--pnb-bg);
}

.pnb-sheet[open] .pnb-sheet__glyph line { stroke: var(--pnb-ink); }

.pnb-sheet__panel {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: var(--pnb-bg);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-block: 4.4rem 2.6rem;
}

html:has(.pnb-sheet[open]) { overflow: hidden; }

.pnb-sheet__title {
  font-family: var(--pnb-display);
  font-size: 0.78rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.18em;
  color: var(--pnb-cool);
  margin-block-end: 0.9rem;
}

.pnb-sheet__list { border-block-start: 1px solid var(--pnb-edge); }

.pnb-sheet__link {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  column-gap: 0.9rem;
  row-gap: 0.1rem;
  align-items: baseline;
  padding: 0.7rem 0.3rem 0.7rem 0;
  border-block-end: 1px solid var(--pnb-rule);
  text-decoration: none;
  color: var(--pnb-ink);
  transition: background-color 160ms ease, padding-inline-start 160ms ease;
}

.pnb-sheet__link:hover,
.pnb-sheet__link:focus-visible {
  background: var(--pnb-surface);
  padding-inline-start: 0.5rem;
}

.pnb-sheet__no {
  font-family: var(--pnb-display);
  font-size: 0.82rem;
  color: var(--pnb-accent);
  font-variant-numeric: tabular-nums;
}

.pnb-sheet__name { font-family: var(--pnb-display); font-size: 1.03rem; }

.pnb-sheet__said {
  grid-column: 2;
  font-size: 0.82rem;
  color: var(--pnb-dim);
}

.pnb-sheet__link[aria-current="page"] {
  border-inline-start: 3px solid var(--pnb-accent);
  padding-inline-start: 0.5rem;
}

.pnb-sheet__link[aria-current="page"] .pnb-sheet__name { color: var(--pnb-warm); }

.pnb-sheet__foot {
  margin-block-start: 1.5rem;
  font-size: 0.82rem;
  color: var(--pnb-dim);
}

/* ------------------------------------------------------------------ split-flap board */
.pnb-board { padding-block: clamp(1.6rem, 5vw, 2.9rem) clamp(1.3rem, 4vw, 2.2rem); }

.pnb-board__grid { display: grid; gap: 1.25rem; }

.pnb-board__face {
  background: var(--pnb-surface);
  border: 1px solid var(--pnb-edge);
  border-block-start: 3px solid var(--pnb-accent);
  padding: clamp(0.85rem, 3vw, 1.35rem);
}

.pnb-board__legend {
  display: flex;
  justify-content: space-between;
  gap: 0.7rem;
  flex-wrap: wrap;
  font-family: var(--pnb-display);
  font-size: 0.71rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.14em;
  color: var(--pnb-dim);
  border-block-end: 1px solid var(--pnb-rule);
  padding-block-end: 0.5rem;
  margin-block-end: 0.85rem;
}

.pnb-flaps { display: flex; gap: 0.2rem; flex-wrap: wrap; align-items: stretch; }
.pnb-flaps--gap { display: block; inline-size: 0.55rem; }

.pnb-flaps--board {
  display: grid;
  grid-template-columns: repeat(5, 1fr) 0.4fr repeat(7, 1fr);
  gap: 0.18rem;
}

.pnb-flaps--board .pnb-flap { inline-size: auto; }
.pnb-flaps--board .pnb-flaps--gap { inline-size: auto; }

.pnb-flap {
  position: relative;
  display: block;
  inline-size: var(--pnb-flap-w);
  block-size: var(--pnb-flap-h);
  overflow: hidden;
  background: var(--pnb-well);
  border: 1px solid var(--pnb-edge);
  perspective: 260px;
}

.pnb-flap::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-start: calc(50% - 1px);
  block-size: 1px;
  background: color-mix(in srgb, var(--pnb-ink) 24%, transparent);
  z-index: 2;
  pointer-events: none;
}

.pnb-flap__hinge {
  display: block;
  transform-origin: 50% 50%;
  animation: pnb-hinge 200ms cubic-bezier(0.45, 0, 0.55, 1) 5 both;
  animation-delay: calc(var(--pnb-i, 0) * 100ms);
}

.pnb-flap__drum {
  display: block;
  transform: translateY(calc(var(--pnb-last, 4) * var(--pnb-flap-h) * -1));
  animation: pnb-drum 1000ms steps(1, end) both;
  animation-delay: calc(var(--pnb-i, 0) * 100ms);
}

.pnb-flap__char {
  display: flex;
  align-items: center;
  justify-content: center;
  block-size: var(--pnb-flap-h);
  font-family: var(--pnb-display);
  font-size: clamp(0.82rem, 3.1vw, 1.2rem);
  color: var(--pnb-ink);
}

.pnb-flap__char--set { color: var(--pnb-warm); }

.pnb-flap--static .pnb-flap__drum,
.pnb-flap--static .pnb-flap__hinge { animation: none; }

.pnb-flap--sm { --pnb-flap-h: 1.7rem; --pnb-flap-w: 1.2rem; }
.pnb-flap--sm .pnb-flap__char { font-size: 0.85rem; }

.pnb-board__read { margin-block-start: 0.85rem; font-size: 0.88rem; color: var(--pnb-dim); }

@keyframes pnb-drum {
  0%   { transform: translateY(0); }
  22%  { transform: translateY(calc(var(--pnb-flap-h) * -1)); }
  44%  { transform: translateY(calc(var(--pnb-flap-h) * -2)); }
  66%  { transform: translateY(calc(var(--pnb-flap-h) * -3)); }
  100% { transform: translateY(calc(var(--pnb-last, 4) * var(--pnb-flap-h) * -1)); }
}

@keyframes pnb-hinge {
  0%   { transform: rotateX(0deg); }
  46%  { transform: rotateX(-74deg); }
  54%  { transform: rotateX(-74deg); }
  100% { transform: rotateX(0deg); }
}

/* ------------------------------------------------------------------ entrance cascade, first paint only */
.pnb-rise {
  animation: pnb-rise 460ms cubic-bezier(0.22, 0.68, 0.32, 1) both;
  animation-delay: calc(var(--pnb-i, 0) * 65ms);
}

@keyframes pnb-rise {
  from { opacity: 0; transform: translateY(0.5rem); }
  to   { opacity: 1; transform: none; }
}

[data-pnb-i="1"]  { --pnb-i: 1; }
[data-pnb-i="2"]  { --pnb-i: 2; }
[data-pnb-i="3"]  { --pnb-i: 3; }
[data-pnb-i="4"]  { --pnb-i: 4; }
[data-pnb-i="5"]  { --pnb-i: 5; }
[data-pnb-i="6"]  { --pnb-i: 6; }
[data-pnb-i="7"]  { --pnb-i: 7; }
[data-pnb-i="8"]  { --pnb-i: 8; }
[data-pnb-i="9"]  { --pnb-i: 9; }
[data-pnb-i="10"] { --pnb-i: 10; }
[data-pnb-i="11"] { --pnb-i: 11; }
[data-pnb-i="12"] { --pnb-i: 12; }

/* ------------------------------------------------------------------ section as a ledger row */
.pnb-sec {
  padding-block: clamp(1.8rem, 5vw, 3.1rem);
  border-block-start: 1px solid var(--pnb-rule);
}

.pnb-sec__head { display: grid; gap: 0.35rem; margin-block-end: 1.25rem; }
.pnb-sec__body > * + * { margin-block-start: 1rem; }

@media (min-width: 60rem) {
  .pnb-sec {
    display: grid;
    grid-template-columns: 13.5rem 1fr;
    column-gap: 3rem;
    align-items: start;
  }
  .pnb-sec__head {
    position: sticky;
    inset-block-start: 4.6rem;
    margin-block-end: 0;
  }
  .pnb-sec--full { grid-template-columns: 1fr; }
  .pnb-sec--full .pnb-sec__head { position: static; margin-block-end: 1.25rem; }
}

/* ------------------------------------------------------------------ the despatch log */
.pnb-log { border-block-start: 1px solid var(--pnb-edge); }

.pnb-log__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.3rem 1.6rem;
  padding-block: 0.9rem;
  border-block-end: 1px solid var(--pnb-rule);
  transition: background-color 200ms ease, border-color 200ms ease;
}

.pnb-log__row:hover { background: var(--pnb-surface); border-block-end-color: var(--pnb-edge); }

.pnb-stamp {
  font-family: var(--pnb-display);
  font-size: 0.8rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.1em;
  color: var(--pnb-accent);
}

.pnb-stamp span { display: block; color: var(--pnb-dim); letter-spacing: 0.05em; }

.pnb-log__act > * + * { margin-block-start: 0.5rem; }
.pnb-log__act h3 { margin-block-end: 0.2rem; }

@media (min-width: 42rem) {
  .pnb-log__row { grid-template-columns: 9.5rem 1fr; }
}

/* ------------------------------------------------------------------ tiles and chips */
.pnb-tiles { display: grid; gap: 0.9rem; grid-template-columns: 1fr; }

@media (min-width: 38rem) { .pnb-tiles { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 72rem) { .pnb-tiles--three { grid-template-columns: repeat(3, 1fr); } }

.pnb-tile {
  background: var(--pnb-surface);
  border: 1px solid var(--pnb-rule);
  border-inline-start: 3px solid var(--pnb-edge);
  padding: 0.9rem 1rem 1rem;
  transition: border-color 200ms ease, background-color 200ms ease;
}

.pnb-tile:hover { border-inline-start-color: var(--pnb-accent); background: var(--pnb-well); }
.pnb-tile h3 { margin-block-end: 0.35rem; }
.pnb-tile p { font-size: 0.94rem; }
.pnb-tile p + p { margin-block-start: 0.5rem; }

.pnb-tile__bar { block-size: 0.75rem; background-image: var(--pnb-stack); margin-block-end: 0.65rem; }

.pnb-chips { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-block-start: 0.65rem; }

.pnb-chip {
  display: inline-block;
  font-family: var(--pnb-display);
  font-size: 0.71rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.1em;
  padding: 0.1rem 0.48rem;
  border: 1px solid var(--pnb-rule);
  color: var(--pnb-dim);
  transition: color 180ms ease, border-color 180ms ease;
}

.pnb-chip:hover { color: var(--pnb-cool); border-color: var(--pnb-accent2); }
.pnb-chip--on { color: var(--pnb-warm); border-color: var(--pnb-accent); }

/* ------------------------------------------------------------------ specification rows */
.pnb-spec { border-block-start: 1px solid var(--pnb-rule); }

.pnb-spec__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.05rem 1.2rem;
  padding-block: 0.55rem;
  border-block-end: 1px solid var(--pnb-rule);
}

@media (min-width: 34rem) { .pnb-spec__row { grid-template-columns: 11rem 1fr; } }

.pnb-spec__key {
  font-family: var(--pnb-display);
  font-size: 0.78rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.1em;
  color: var(--pnb-cool);
}

.pnb-spec__val { font-size: 0.95rem; }

/* ------------------------------------------------------------------ the two sheets (widgets) */
.pnb-sheetbox {
  background: var(--pnb-surface);
  border: 1px solid var(--pnb-edge);
  padding: clamp(0.9rem, 3vw, 1.4rem);
}

.pnb-fields { display: grid; gap: 0.8rem; grid-template-columns: 1fr; }

@media (min-width: 34rem) { .pnb-fields { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 58rem) { .pnb-fields--four { grid-template-columns: repeat(4, 1fr); } }

.pnb-field { display: grid; gap: 0.25rem; }

.pnb-field__label {
  font-family: var(--pnb-display);
  font-size: 0.74rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.12em;
  color: var(--pnb-cool);
}

.pnb-field input {
  background: var(--pnb-well);
  border: 1px solid var(--pnb-edge);
  color: var(--pnb-ink);
  padding: 0.5rem 0.55rem;
  inline-size: 100%;
  min-inline-size: 0;
  font-variant-numeric: tabular-nums;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.pnb-field input:hover { border-color: var(--pnb-cool); }
.pnb-field input:focus-visible { border-color: var(--pnb-accent); background: var(--pnb-bg); }
.pnb-field__hint { font-size: 0.76rem; color: var(--pnb-dim); }

.pnb-out { margin-block-start: 1.2rem; border-block-start: 1px solid var(--pnb-edge); }

.pnb-out__row {
  display: grid;
  grid-template-columns: 1.6rem 1fr;
  column-gap: 0.75rem;
  row-gap: 0.1rem;
  padding-block: 0.6rem;
  border-block-end: 1px solid var(--pnb-rule);
  position: relative;
  transition: background-color 220ms ease;
}

.pnb-out__row:hover { background: var(--pnb-well); }

.pnb-out__step {
  font-family: var(--pnb-display);
  font-size: 0.74rem;
  color: var(--pnb-accent2);
  font-variant-numeric: tabular-nums;
}

.pnb-out__said { font-size: 0.92rem; }
.pnb-out__sum { display: block; font-family: var(--pnb-display); font-size: 0.95rem; color: var(--pnb-warm); }
.pnb-out__fig { font-family: var(--pnb-display); color: var(--pnb-warm); }

.pnb-out__row--skip .pnb-out__said { color: var(--pnb-dim); }
.pnb-out__row--total { background: var(--pnb-well); border-block-end-color: var(--pnb-accent); }
.pnb-out__row--total .pnb-out__sum { font-size: 1.05rem; }

.pnb-out__row--fresh::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--pnb-accent);
  pointer-events: none;
  animation: pnb-tick 520ms ease-out forwards;
}

@keyframes pnb-tick {
  0%   { opacity: 0.22; }
  100% { opacity: 0; }
}

.pnb-guide {
  margin-block-start: 0.9rem;
  font-size: 0.82rem;
  color: var(--pnb-dim);
  border-inline-start: 2px solid var(--pnb-accent2);
  padding-inline-start: 0.75rem;
}

/* ------------------------------------------------------------------ drawings */
.pnb-draw { margin-block: 1rem; }

.pnb-draw svg {
  inline-size: 100%;
  block-size: auto;
  max-inline-size: 29rem;
  margin-inline: auto;
}

.pnb-draw--wide svg { max-inline-size: 44rem; }

.pnb-draw figcaption {
  font-size: 0.8rem;
  color: var(--pnb-dim);
  margin-block-start: 0.5rem;
  border-block-start: 1px solid var(--pnb-rule);
  padding-block-start: 0.4rem;
}

.pnb-plan__floor { fill: var(--pnb-surface); stroke: var(--pnb-edge); stroke-width: 1.2; }
.pnb-plan__zone { fill: var(--pnb-well); stroke: var(--pnb-rule); stroke-width: 1; }
.pnb-plan__zone--hot { stroke: var(--pnb-accent); stroke-width: 1.4; }
.pnb-plan__rack { fill: none; stroke: var(--pnb-accent2); stroke-width: 2.4; stroke-linecap: square; }
.pnb-plan__flow { fill: none; stroke: var(--pnb-accent); stroke-width: 1.6; stroke-dasharray: 5 4; }
.pnb-plan__door { fill: none; stroke: var(--pnb-ink); stroke-width: 2.4; }

.pnb-plan__label,
.pnb-plan__label--dim {
  font-family: var(--pnb-display);
  letter-spacing: 0.08em;
}

.pnb-plan__label { fill: var(--pnb-ink); font-size: 9.5px; }
.pnb-plan__label--dim { fill: var(--pnb-dim); font-size: 8.5px; }

.pnb-box__face { fill: var(--pnb-surface); stroke: var(--pnb-edge); stroke-width: 1.3; }
.pnb-box__face--lit { fill: var(--pnb-well); }
.pnb-box__dim { fill: none; stroke: var(--pnb-accent2); stroke-width: 1.2; }
.pnb-box__tick { stroke: var(--pnb-accent2); stroke-width: 1.2; }
.pnb-box__fill { fill: none; stroke: var(--pnb-accent); stroke-width: 1.3; stroke-linecap: round; }

.pnb-box__label,
.pnb-box__label--dim {
  font-family: var(--pnb-display);
  letter-spacing: 0.06em;
}

.pnb-box__label { fill: var(--pnb-ink); font-size: 10px; }
.pnb-box__label--dim { fill: var(--pnb-dim); font-size: 9px; }

/* ------------------------------------------------------------------ onward links */
.pnb-onward { display: grid; gap: 0.55rem; border-block-start: 1px solid var(--pnb-rule); margin-block-start: 1.2rem; }

.pnb-onward a {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.4rem 0.8rem;
  align-items: baseline;
  padding-block: 0.6rem;
  border-block-end: 1px solid var(--pnb-rule);
  text-decoration: none;
  color: var(--pnb-ink);
  font-family: var(--pnb-display);
  transition: color 180ms ease, padding-inline-start 180ms ease;
}

.pnb-onward a:hover,
.pnb-onward a:focus-visible { color: var(--pnb-warm); padding-inline-start: 0.4rem; }

.pnb-onward span {
  font-family: var(--pnb-body);
  font-size: 0.8rem;
  color: var(--pnb-dim);
}

/* ------------------------------------------------------------------ footer */
.pnb-foot {
  border-block-start: 3px solid var(--pnb-accent);
  background: var(--pnb-surface);
  margin-block-start: 2.4rem;
  padding-block: 1.8rem 2.2rem;
  font-size: 0.9rem;
}

.pnb-foot__grid { display: grid; gap: 1.3rem; grid-template-columns: 1fr; }

@media (min-width: 46rem) { .pnb-foot__grid { grid-template-columns: repeat(3, 1fr); } }

.pnb-foot__h {
  font-family: var(--pnb-display);
  font-size: 0.74rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.14em;
  color: var(--pnb-cool);
  margin-block-end: 0.5rem;
}

.pnb-foot__office { font-style: normal; }
.pnb-foot__office span { display: block; }
.pnb-foot__office span:first-child { font-family: var(--pnb-display); letter-spacing: 0.04em; }

.pnb-foot__reg { display: grid; grid-template-columns: auto 1fr; gap: 0.1rem 0.7rem; font-size: 0.86rem; }
.pnb-foot__reg dt { color: var(--pnb-dim); }
.pnb-foot__reg dd { font-variant-numeric: tabular-nums; }

.pnb-foot__lines { margin-block-start: 1.4rem; border-block-start: 1px solid var(--pnb-rule); padding-block-start: 0.9rem; }
.pnb-foot__lines p { font-size: 0.86rem; color: var(--pnb-dim); }
.pnb-foot__lines p:first-child { color: var(--pnb-ink); }

/* ------------------------------------------------------------------ narrow widths */
@media (max-width: 30rem) {
  .pnb-head__where { display: none; }
  .pnb-flaps { gap: 0.15rem; }
  .pnb-flaps--gap { inline-size: 0.4rem; }
  .pnb-flaps--board { gap: 0.12rem; }
}

/* ------------------------------------------------------------------ sub-sheet head */
.pnb-pagehead {
  display: grid;
  gap: 0.55rem;
  padding-block: clamp(1.3rem, 4vw, 2.3rem) clamp(0.9rem, 3vw, 1.5rem);
}

.pnb-pagehead__no { display: flex; gap: 0.18rem; align-items: center; }
.pnb-pagehead h1 { max-inline-size: 30ch; }
.pnb-pagehead .pnb-lead { max-inline-size: 62ch; }

/* ------------------------------------------------------------------ numbered stages */
.pnb-stages {
  counter-reset: pnbstage;
  border-block-start: 1px solid var(--pnb-edge);
}

.pnb-stages li {
  display: grid;
  grid-template-columns: 2.1rem 1fr;
  gap: 0.15rem 0.85rem;
  padding-block: 0.8rem;
  border-block-end: 1px solid var(--pnb-rule);
  transition: background-color 190ms ease;
}

.pnb-stages li:hover { background: var(--pnb-surface); }

.pnb-stages li::before {
  counter-increment: pnbstage;
  content: counter(pnbstage, decimal-leading-zero);
  font-family: var(--pnb-display);
  font-size: 0.82rem;
  color: var(--pnb-accent);
  font-variant-numeric: tabular-nums;
  grid-row: span 2;
}

.pnb-stages h3 { grid-column: 2; }
.pnb-stages p { grid-column: 2; font-size: 0.95rem; }

/* ------------------------------------------------------------------ reduced motion: land everything settled */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }

  .pnb-flap__drum {
    animation: none !important;
    transform: translateY(calc(var(--pnb-last, 4) * var(--pnb-flap-h) * -1)) !important;
  }

  .pnb-flap__hinge {
    animation: none !important;
    transform: none !important;
  }

  .pnb-rise {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .pnb-out__row--fresh::after {
    animation: none !important;
    opacity: 0 !important;
  }
}