/* ==========================================================================
   Naughty Bean Consulting — "the drawing set"
   The site is styled as a set of engineering drawing sheets: paper, ink,
   redline markup, a title block, dimension lines. Two colour schemes:
   PAPER (light) and BLUEPRINT (dark).
   ========================================================================== */

:root {
  --paper: #f1ede3;
  --paper-2: #e8e3d6;
  --white: #fbfaf6;
  --ink: #17140f;
  --ink-2: #57524a;
  --ink-3: #8a8478;
  --rule: rgba(23, 20, 15, 0.24);
  --rule-soft: rgba(23, 20, 15, 0.11);
  --grid: rgba(23, 20, 15, 0.06);
  --red: #b3260f;
  --red-soft: rgba(179, 38, 15, 0.09);
  --band: #17140f;
  --band-ink: #f1ede3;
  --fig-bg: #ffffff;

  --frame: 10px;
  --gutter: clamp(16px, 4vw, 56px);
  --max: 1360px;
  --hdr-h: 64px;

  --font-display: "Archivo", "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --stamp-blend: multiply;
  color-scheme: light;
}

:root[data-theme="blueprint"] {
  --paper: #0e2440;
  --paper-2: #0b1d34;
  --white: #12294a;
  --ink: #eaf0fa;
  --ink-2: #b7c4da;
  --ink-3: #7f90ab;
  --rule: rgba(234, 240, 250, 0.3);
  --rule-soft: rgba(234, 240, 250, 0.13);
  --grid: rgba(234, 240, 250, 0.075);
  --red: #ff8a6e;
  --red-soft: rgba(255, 138, 110, 0.13);
  --band: #eaf0fa;
  --band-ink: #0e2440;
  --fig-bg: #ffffff;
  --stamp-blend: normal;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
}
fieldset { min-inline-size: 0; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: calc(var(--frame) + 1px) calc(var(--frame) + 1px);
  font-family: var(--font-display);
  font-size: 1.0625rem;
  line-height: 1.55;
  font-feature-settings: "ss01", "kern";
}

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

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { color: var(--red); }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.05; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: var(--paper); padding: 0.5rem 1rem; z-index: 100;
}
.skip:focus { left: calc(var(--frame) + 8px); top: calc(var(--frame) + 8px); }

/* Mono label — used everywhere for annotation */
.lbl {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-2);
}

/* Display type helpers */
.display {
  font-family: var(--font-display);
  font-stretch: 72%;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.005em;
  line-height: 0.92;
}

/* --------------------------------------------------------------------------
   Frame — the drawing border, fixed to the viewport
   -------------------------------------------------------------------------- */
.frame {
  position: fixed;
  inset: var(--frame);
  border: 1px solid var(--ink);
  pointer-events: none;
  z-index: 70;
}
.frame__mark {
  position: absolute;
  width: 18px; height: 18px;
}
.frame__mark::before, .frame__mark::after {
  content: ""; position: absolute; background: var(--ink);
}
.frame__mark::before { left: 50%; top: 0; width: 1px; height: 100%; }
.frame__mark::after { top: 50%; left: 0; height: 1px; width: 100%; }
.frame__mark--tl { top: -9px; left: -9px; }
.frame__mark--tr { top: -9px; right: -9px; }
.frame__mark--bl { bottom: -9px; left: -9px; }
.frame__mark--br { bottom: -9px; right: -9px; }

/* --------------------------------------------------------------------------
   Header (sheet strip)
   -------------------------------------------------------------------------- */
.hdr {
  position: sticky;
  top: var(--frame);
  z-index: 60;
  margin: var(--frame) var(--frame) 0;
  min-height: var(--hdr-h);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: stretch;
  background: var(--paper);
  border-bottom: 1px solid var(--ink);
}

.brand {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0 1.1rem 0 calc(var(--gutter) - var(--frame));
  border-right: 1px solid var(--ink);
  text-decoration: none;
}
.brand:hover { color: inherit; background: var(--red-soft); }
.brand__mark { width: 34px; height: 34px; flex: none; }
.brand__text { display: flex; flex-direction: column; line-height: 1; }
.brand__name {
  font-stretch: 78%; font-weight: 800; text-transform: uppercase;
  font-size: 1.15rem; letter-spacing: 0.01em;
}
.brand__sub {
  font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--ink-2); margin-top: 0.3rem;
}

.hdr__sheet {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0 1.25rem;
  min-width: 0;
  overflow: hidden;
}
.hdr__sheetno {
  font-family: var(--font-mono); font-weight: 600; font-size: 0.8rem;
  border: 1px solid var(--ink); padding: 0.15em 0.5em; white-space: nowrap;
}
.hdr__sheettitle {
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em;
  text-transform: uppercase; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.nav {
  display: flex; align-items: stretch;
}
.nav__link {
  display: flex; align-items: center; gap: 0.5em;
  padding: 0 1rem;
  font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase;
  text-decoration: none; border-left: 1px solid var(--rule-soft);
  position: relative;
}
.nav__idx { color: var(--ink-3); font-weight: 400; }
.nav__link:hover { background: var(--red-soft); color: var(--ink); }
.nav__link.is-active::after {
  content: ""; position: absolute; left: 0.75rem; right: 0.75rem; bottom: 0; height: 3px; background: var(--red);
}
.nav__cta { margin: 0.75rem calc(var(--gutter) - var(--frame)) 0.75rem 0.9rem; align-self: center; }

.theme-toggle {
  display: flex; align-items: center; gap: 0.35em;
  padding: 0 1rem; border: 0; border-left: 1px solid var(--rule-soft); background: transparent; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3);
}
.theme-toggle:hover { background: var(--red-soft); }
.theme-toggle__opt.is-on { color: var(--ink); font-weight: 600; text-decoration: underline; text-underline-offset: 0.25em; }
.theme-toggle__sep { color: var(--ink-3); }

.menu-btn {
  display: none;
  border: 0; border-left: 1px solid var(--ink); background: transparent; cursor: pointer;
  padding: 0 1.1rem;
  font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase;
}
.menu-btn[aria-expanded="true"] { background: var(--ink); color: var(--paper); }

.mnav {
  position: sticky; top: calc(var(--frame) + var(--hdr-h)); z-index: 59;
  margin: 0 var(--frame);
  background: var(--paper); border-bottom: 1px solid var(--ink);
}
.mnav__list { list-style: none; margin: 0; padding: 0; }
.mnav__list li + li { border-top: 1px solid var(--rule-soft); }
.mnav__list a {
  display: flex; gap: 1rem; padding: 1rem var(--gutter);
  font-family: var(--font-mono); font-size: 0.9rem; letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none;
}
.mnav__foot {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.9rem var(--gutter); border-top: 1px solid var(--ink);
}
.mnav__foot .theme-toggle { border: 0; padding: 0; }

/* --------------------------------------------------------------------------
   Sheet (main column)
   -------------------------------------------------------------------------- */
.sheet {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Section heading — a detail callout */
.shead {
  display: flex; align-items: center; gap: 1rem;
  margin: clamp(3rem, 7vw, 5.5rem) 0 1.75rem;
  scroll-margin-top: calc(var(--hdr-h) + var(--frame) + 1rem);
}
.shead__callout {
  flex: none; width: 2.1rem; height: 2.1rem;
  display: grid; place-items: center;
  border: 1.5px solid var(--ink); border-radius: 50%;
  font-family: var(--font-mono); font-weight: 600; font-size: 0.85rem;
}
.shead__title {
  font-stretch: 78%; font-weight: 800; text-transform: uppercase;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem); letter-spacing: 0.005em; line-height: 1;
}
.shead__rule { flex: 1; height: 1px; background: var(--ink); min-width: 2rem; }
.shead__note { white-space: nowrap; }

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6em;
  padding: 0.7em 1.15em;
  border: 1.5px solid var(--ink); background: transparent; color: var(--ink);
  font-family: var(--font-mono); font-size: 0.74rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
  text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background 0.12s, color 0.12s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn--red { border-color: var(--red); background: var(--red); color: #fff; }
.btn--red:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
:root[data-theme="blueprint"] .btn--red { color: #0e2440; }
.btn--lg { font-size: 0.86rem; padding: 0.95em 1.6em; }
.btn--block { width: 100%; }
.btn[disabled] { opacity: 0.55; cursor: progress; }

/* --------------------------------------------------------------------------
   Dimension line
   -------------------------------------------------------------------------- */
.dim {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  height: 30px; max-width: 100%;
  margin-top: 0.9rem;
}
.dim::before, .dim::after {
  content: ""; position: absolute; top: -6px; bottom: 6px; width: 1px; background: var(--ink);
}
.dim::before { left: 0; }
.dim::after { right: 0; }
.dim__line { position: absolute; left: 0; right: 0; top: 50%; height: 1px; background: var(--ink); }
.dim__line::before, .dim__line::after {
  content: ""; position: absolute; top: -6px; width: 1px; height: 13px; background: var(--ink); transform: rotate(45deg);
}
.dim__line::before { left: 0; }
.dim__line::after { right: 0; }
.dim__label {
  position: relative; z-index: 1;
  padding: 0 0.6em; background: var(--paper);
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--ink-2);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   Stamp
   -------------------------------------------------------------------------- */
.stamp {
  display: inline-block;
  padding: 0.28em 0.6em 0.22em;
  border: 2px solid currentColor;
  font-family: var(--font-mono); font-weight: 600; font-size: 0.66rem; letter-spacing: 0.16em; text-transform: uppercase;
  line-height: 1; white-space: nowrap;
  transform: rotate(-4deg);
  mix-blend-mode: var(--stamp-blend);
  color: var(--ink-2);
}
.stamp--live { color: var(--red); }
.stamp--build { color: var(--red); border-style: dashed; }
.stamp--oss { color: var(--ink); border-style: double; border-width: 4px; }
.stamp--client { color: var(--ink); }
.stamp--internal { color: var(--ink-3); }
.stamp--lg {
  font-size: 1.05rem; padding: 0.4em 0.9em 0.32em; border-width: 3px; transform: rotate(-7deg);
}
.stamp--lg.stamp--oss { border-width: 6px; }

@keyframes stamp-in {
  0%   { transform: rotate(-7deg) scale(1.7); opacity: 0; }
  60%  { transform: rotate(-7deg) scale(0.96); opacity: 1; }
  100% { transform: rotate(-7deg) scale(1); opacity: 1; }
}
.stamp--lg[data-stamp].is-in { animation: stamp-in 0.38s cubic-bezier(0.2, 0.9, 0.3, 1.2) both; }

/* --------------------------------------------------------------------------
   Hero (home)
   -------------------------------------------------------------------------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.85fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: end;
  padding: clamp(2.5rem, 7vw, 6rem) 0 clamp(2rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--ink);
}
.hero__eyebrow {
  display: flex; flex-wrap: wrap; gap: 0.5em 1.25em; margin-bottom: 1.5rem;
}
.hero__eyebrow .lbl { color: var(--ink); }
.hero__eyebrow .lbl + .lbl::before { content: "·"; margin-right: 1.25em; color: var(--ink-3); }
.hero__title {
  font-stretch: 68%; font-weight: 800; text-transform: uppercase;
  font-size: clamp(3.4rem, 10.5vw, 9.6rem); line-height: 0.88; letter-spacing: -0.01em;
  margin: 0; max-width: 100%;
}
.hero__title em { font-style: normal; color: var(--red); }
.hero__lede {
  margin: 2rem 0 0; max-width: 40rem;
  font-size: clamp(1.1rem, 1.6vw, 1.3rem); line-height: 1.45; text-wrap: pretty;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

/* Legend box */
.legend {
  border: 1px solid var(--ink);
  background: var(--paper);
}
.legend__head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.55rem 0.9rem; border-bottom: 1px solid var(--ink);
}
.legend__head .lbl { color: var(--ink); font-weight: 600; }
.legend__list { list-style: none; margin: 0; padding: 0; }
.legend__item {
  display: grid; grid-template-columns: 2.4rem 1fr; gap: 0.8rem; align-items: center;
  padding: 0.7rem 0.9rem;
}
.legend__item + .legend__item { border-top: 1px solid var(--rule-soft); }
.legend__sym {
  width: 2.4rem; height: 2.4rem; border: 1px solid var(--ink);
  display: grid; place-items: center; background: var(--paper);
}
.legend__sym svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.4; stroke-linecap: square; }
.legend__name { display: block; font-weight: 700; font-stretch: 90%; font-size: 1rem; line-height: 1.1; }
.legend__note { display: block; color: var(--ink-2); font-size: 0.88rem; line-height: 1.3; margin-top: 0.15rem; }
.legend__foot {
  padding: 0.6rem 0.9rem; border-top: 1px solid var(--ink);
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; color: var(--ink-2);
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   Drawing register (products table)
   -------------------------------------------------------------------------- */
.reg { border-top: 1.5px solid var(--ink); border-bottom: 1.5px solid var(--ink); }
.reg th {
  text-align: left; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--ink);
  font-family: var(--font-mono); font-size: 0.66rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2);
}
.reg td { padding: 1rem 0.75rem; border-bottom: 1px solid var(--rule-soft); vertical-align: middle; }
.reg__row { position: relative; cursor: pointer; }
.reg__row:hover td { background: var(--red-soft); }
.reg__row:hover .reg__arrow { color: var(--red); transform: translateX(4px); }
.reg__no { width: 4.5rem; }
.reg__no a { font-family: var(--font-mono); font-weight: 600; font-size: 0.85rem; text-decoration: none; }
.reg__name a { font-weight: 700; font-stretch: 88%; font-size: 1.25rem; text-decoration: none; letter-spacing: -0.005em; }
.reg__name .reg__what { display: none; }
.reg__what-col { color: var(--ink-2); max-width: 30rem; }
.reg__stack { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.02em; color: var(--ink-2); white-space: nowrap; }
.reg__status { width: 8rem; }
.reg__arrow { width: 2rem; text-align: right; font-family: var(--font-mono); transition: transform 0.15s; }
.reg__foot { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; margin-top: 1rem; }

/* --------------------------------------------------------------------------
   Spec clauses (services)
   -------------------------------------------------------------------------- */
.spec { list-style: none; margin: 0; padding: 0; border-top: 1.5px solid var(--ink); }
.spec--grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 0; gap: 0; }
.spec--grid .spec__item { border-top: 1.5px solid var(--ink); }
.spec__item {
  display: grid; grid-template-columns: 4rem 1fr; gap: 0 1rem;
  padding: 1.35rem 0 1.5rem; border-bottom: 1px solid var(--rule-soft);
}
.spec--grid .spec__item:nth-child(odd) { padding-right: clamp(1rem, 3vw, 2.5rem); border-right: 1px solid var(--rule-soft); }
.spec--grid .spec__item:nth-child(even) { padding-left: clamp(1rem, 3vw, 2.5rem); }
.spec__no { font-family: var(--font-mono); font-weight: 600; font-size: 0.95rem; padding-top: 0.25rem; }
.spec__title {
  font-weight: 700; font-stretch: 85%; font-size: 1.45rem; line-height: 1.1; margin-bottom: 0.5rem;
}
.spec__body { color: var(--ink-2); max-width: 40rem; }
.spec__body p { margin-bottom: 0.6em; }
.spec__sub { list-style: none; margin: 0.75rem 0 0; padding: 0; }
.spec__sub li { display: grid; grid-template-columns: 3rem 1fr; gap: 0.75rem; padding: 0.35rem 0; border-top: 1px dashed var(--rule-soft); }
.spec__sub .spec__no { font-size: 0.8rem; font-weight: 500; padding-top: 0.1rem; color: var(--ink-2); }
.spec__tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.75rem; }

.tag {
  display: inline-block; padding: 0.25em 0.55em; border: 1px solid var(--rule);
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2);
}

/* --------------------------------------------------------------------------
   Revision history (process)
   -------------------------------------------------------------------------- */
.revs { border-top: 1.5px solid var(--ink); border-bottom: 1.5px solid var(--ink); }
.revs th {
  text-align: left; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--ink);
  font-family: var(--font-mono); font-size: 0.66rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2);
}
.revs td { padding: 1.1rem 0.75rem; border-bottom: 1px solid var(--rule-soft); vertical-align: top; }
.revs__rev { width: 4.5rem; font-family: var(--font-mono); font-weight: 600; font-size: 1.1rem; }
.revs__stage { width: 12rem; font-weight: 700; font-stretch: 88%; font-size: 1.15rem; }
.revs__desc { color: var(--ink-2); }
.revs__out { width: 22%; font-family: var(--font-mono); font-size: 0.76rem; line-height: 1.5; }

/* --------------------------------------------------------------------------
   Notes box
   -------------------------------------------------------------------------- */
.notes { border: 1px solid var(--ink); }
.notes__head { padding: 0.55rem 0.9rem; border-bottom: 1px solid var(--ink); }
.notes__head .lbl { color: var(--ink); font-weight: 600; }
.notes__list { margin: 0; padding: 0.4rem 0; list-style: none; counter-reset: note; }
.notes__list li {
  counter-increment: note; display: grid; grid-template-columns: 2.4rem 1fr; gap: 0.5rem;
  padding: 0.6rem 0.9rem; color: var(--ink-2);
}
.notes__list li::before { content: counter(note) "."; font-family: var(--font-mono); font-weight: 600; color: var(--ink); }
.notes__list li + li { border-top: 1px solid var(--rule-soft); }
.notes--2col .notes__list { columns: 2; column-gap: 0; }
.notes--2col .notes__list li { break-inside: avoid; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; align-items: start; }

/* --------------------------------------------------------------------------
   RFQ band
   -------------------------------------------------------------------------- */
.rfq {
  margin: clamp(3rem, 7vw, 5.5rem) calc(-1 * var(--gutter)) 0;
  background: var(--band); color: var(--band-ink);
}
.rfq__inner { max-width: var(--max); margin: 0 auto; padding: clamp(2.5rem, 6vw, 4.5rem) var(--gutter); }
.rfq .lbl { color: var(--band-ink); opacity: 0.7; }
.rfq__title {
  font-stretch: 70%; font-weight: 800; text-transform: uppercase;
  font-size: clamp(2.6rem, 7vw, 5.5rem); line-height: 0.9; margin: 0.75rem 0 1.25rem;
}
.rfq__lede { max-width: 38rem; font-size: 1.1rem; opacity: 0.85; }
.rfq__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.75rem; margin-top: 2rem; }
.rfq__mail { font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 0.04em; }
.rfq__mail:hover { color: var(--red); }
:root[data-theme="blueprint"] .rfq .btn--red { color: #0e2440; }
:root[data-theme="blueprint"] .rfq .btn--red:hover { background: #0e2440; border-color: #0e2440; color: #eaf0fa; }
:root[data-theme="paper"] .rfq .btn--red:hover, :root:not([data-theme="blueprint"]) .rfq .btn--red:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }

/* --------------------------------------------------------------------------
   Title block (footer)
   -------------------------------------------------------------------------- */
.tb {
  margin: clamp(3rem, 6vw, 4.5rem) var(--frame) var(--frame);
  border-top: 1.5px solid var(--ink);
  display: grid;
  grid-template-columns: 2.2fr 1.5fr 0.9fr 0.7fr 1fr 0.5fr 0.6fr 1.8fr;
  grid-template-areas:
    "brand title sheet drawn date rev scale contact"
    "brand links links links links links links copy";
}
.tb__cell {
  display: flex; flex-direction: column; justify-content: center; gap: 0.25rem;
  padding: 0.8rem 0.9rem; min-height: 4.2rem;
  border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink);
  min-width: 0;
}
.tb__cell:nth-child(2) { grid-area: title; }
.tb__cell:nth-child(3) { grid-area: sheet; }
.tb__cell:nth-child(4) { grid-area: drawn; }
.tb__cell:nth-child(5) { grid-area: date; }
.tb__cell:nth-child(6) { grid-area: rev; }
.tb__cell:nth-child(7) { grid-area: scale; }
.tb__cell--brand { grid-area: brand; padding-left: calc(var(--gutter) - var(--frame)); border-bottom: 0; justify-content: center; }
.tb__cell--contact { grid-area: contact; border-right: 0; }
.tb__cell--links { grid-area: links; flex-direction: row; flex-wrap: wrap; gap: 0.4rem 1.4rem; align-items: center; border-bottom: 0; }
.tb__cell--copy { grid-area: copy; border-right: 0; border-bottom: 0; font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.04em; color: var(--ink-2); line-height: 1.45; }
.tb__cell--links a { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none; }
.tb__cell--links a:hover { text-decoration: underline; }
.tb__big { font-stretch: 72%; font-weight: 800; text-transform: uppercase; font-size: clamp(1.6rem, 2.6vw, 2.3rem); line-height: 0.95; }
.tb__small { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2); margin-top: 0.4rem; }
.tb__val { font-weight: 600; font-stretch: 90%; font-size: 0.95rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tb__val--mono { font-family: var(--font-mono); font-weight: 500; font-size: 0.85rem; }
.tb__of { color: var(--ink-3); font-size: 0.7em; }
a.tb__val { text-decoration: none; }
a.tb__val:hover { text-decoration: underline; }

/* --------------------------------------------------------------------------
   Page hero (inner pages)
   -------------------------------------------------------------------------- */
.phead {
  padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(1.75rem, 4vw, 2.75rem);
  border-bottom: 1px solid var(--ink);
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2rem; align-items: end;
}
.phead__eyebrow { display: flex; flex-wrap: wrap; gap: 0.5em 1.25em; margin-bottom: 1.25rem; }
.phead__eyebrow .lbl { color: var(--ink); }
.phead__eyebrow .lbl + .lbl::before { content: "·"; margin-right: 1.25em; color: var(--ink-3); }
.phead__title {
  font-stretch: 70%; font-weight: 800; text-transform: uppercase;
  font-size: clamp(2.8rem, 7.5vw, 6.5rem); line-height: 0.9; letter-spacing: -0.01em;
}
.phead__lede { margin: 1.5rem 0 0; max-width: 44rem; font-size: clamp(1.05rem, 1.5vw, 1.25rem); line-height: 1.45; color: var(--ink-2); text-wrap: pretty; }
.phead__aside { display: flex; flex-direction: column; align-items: flex-end; gap: 1rem; }

/* --------------------------------------------------------------------------
   Product sheet
   -------------------------------------------------------------------------- */
.prod__grid {
  display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(300px, 0.8fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  margin-top: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
.prod__aside { display: grid; gap: 1.5rem; position: sticky; top: calc(var(--frame) + var(--hdr-h) + 1.25rem); }

.fig { margin: 0; border: 1px solid var(--ink); }
.fig__cap {
  display: flex; align-items: baseline; gap: 0.75rem;
  padding: 0.55rem 0.9rem; border-bottom: 1px solid var(--ink);
  font-weight: 600; font-stretch: 90%; font-size: 0.95rem;
}
.fig__cap .lbl { color: var(--ink); }
.fig__body { padding: 1.25rem; }
.fig--mark .fig__body { background: var(--fig-bg); display: grid; place-items: center; min-height: 12rem; }
.fig--mark img { width: min(60%, 240px); filter: grayscale(1) contrast(1.05); transition: filter 0.25s; }
.fig--mark:hover img { filter: none; }
.fig--diagram .fig__body { padding: 0; cursor: crosshair; }

.kv { border: 1px solid var(--ink); }
.kv__row { display: grid; grid-template-columns: 6.5rem 1fr; gap: 0.75rem; padding: 0.6rem 0.9rem; }
.kv__row + .kv__row { border-top: 1px solid var(--rule-soft); }
.kv__val { font-weight: 600; font-stretch: 92%; font-size: 0.95rem; min-width: 0; overflow-wrap: anywhere; }
.kv__val a { text-decoration: none; border-bottom: 1px solid var(--rule); }
.kv__val a:hover { border-color: var(--red); }

.prose { max-width: 66ch; font-size: 1.08rem; }
.prose p { margin-bottom: 1.1em; text-wrap: pretty; }
.prose > :first-child { margin-top: 0; }
.prose h2 {
  font-stretch: 85%; font-weight: 700; font-size: 1.35rem; text-transform: uppercase; letter-spacing: 0.01em;
  margin: 2.2em 0 0.7em; padding-top: 0.7em; border-top: 1px solid var(--rule);
}
.prose h3 { font-stretch: 88%; font-weight: 700; font-size: 1.15rem; margin: 1.6em 0 0.5em; }
.prose ul, .prose ol { padding-left: 1.4em; color: var(--ink-2); }
.prose li { margin-bottom: 0.4em; }
.prose strong { font-weight: 700; color: var(--ink); }
.prose blockquote { margin: 1.5em 0; padding: 0.25em 0 0.25em 1.25em; border-left: 3px solid var(--red); color: var(--ink); font-stretch: 92%; font-size: 1.15em; }
.prose code { font-family: var(--font-mono); font-size: 0.86em; background: var(--red-soft); padding: 0.1em 0.35em; }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2em 0; }
.prose table { margin: 1.25em 0; font-size: 0.95rem; }
.prose th, .prose td { text-align: left; padding: 0.5em 0.75em; border-bottom: 1px solid var(--rule-soft); vertical-align: top; }
.prose th { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2); border-bottom-color: var(--ink); }

.prod__section { margin-top: clamp(2.5rem, 5vw, 4rem); }

.bom { border-top: 1.5px solid var(--ink); border-bottom: 1.5px solid var(--ink); }
.bom th {
  text-align: left; padding: 0.55rem 0.75rem; border-bottom: 1px solid var(--ink);
  font-family: var(--font-mono); font-size: 0.66rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2);
}
.bom td { padding: 0.7rem 0.75rem; border-bottom: 1px solid var(--rule-soft); vertical-align: top; }
.bom__no { width: 3.5rem; font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-2); }
.bom__layer { width: 11rem; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); padding-top: 0.85rem; }
.bom__item { font-weight: 600; font-stretch: 92%; }

.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.prodnav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
  margin-top: clamp(2.5rem, 5vw, 4rem); border-top: 1.5px solid var(--ink); padding-top: 1rem;
}
.prodnav a { display: flex; flex-direction: column; gap: 0.3rem; text-decoration: none; padding: 0.75rem; }
.prodnav a:hover { background: var(--red-soft); color: var(--ink); }
.prodnav__next { text-align: right; align-items: flex-end; }
.prodnav__name { font-weight: 700; font-stretch: 85%; font-size: 1.35rem; }

/* --------------------------------------------------------------------------
   Diagram (SVG built by js/diagram.js)
   -------------------------------------------------------------------------- */
.diagram { overflow-x: auto; overflow-y: hidden; padding: 1.25rem; max-width: 100%; }
.diagram svg { display: block; margin: 0 auto; font-family: var(--font-mono); }
.dg-node rect, .dg-node path, .dg-node ellipse { fill: var(--paper); stroke: var(--ink); stroke-width: 1.25; vector-effect: non-scaling-stroke; }
.dg-node--ext rect, .dg-node--ext path { stroke-dasharray: 4 3; stroke: var(--ink-2); }
.dg-node--store rect { fill: var(--paper-2); }
.dg-node--accent rect, .dg-node--accent path { stroke: var(--red); stroke-width: 1.75; }
.dg-node--user rect { fill: var(--white); }
.dg-node text { fill: var(--ink); font-size: 10.5px; letter-spacing: 0.04em; text-transform: uppercase; }
.dg-node--ext text { fill: var(--ink-2); }
.dg-node--accent text { fill: var(--red); font-weight: 600; }
.dg-node .dg-kind { fill: var(--ink-3); font-size: 8px; letter-spacing: 0.12em; }
.dg-edge { fill: none; stroke: var(--ink); stroke-width: 1; }
.dg-edge--soft { stroke-dasharray: 3 3; stroke: var(--ink-2); }
.dg-arrow { fill: var(--ink); }
.dg-arrow--soft { fill: var(--ink-2); }
.dg-elabel rect { fill: var(--paper); stroke: none; }
.dg-elabel text { fill: var(--ink-2); font-size: 8.5px; letter-spacing: 0.08em; text-transform: uppercase; }
.dg-grid { stroke: var(--grid); stroke-width: 1; }
.diagram__fallback { margin: 0; padding: 1rem 1rem 1rem 2rem; font-family: var(--font-mono); font-size: 0.8rem; }

/* --------------------------------------------------------------------------
   Contact / RFQ form
   -------------------------------------------------------------------------- */
.rfqf { border: 1.5px solid var(--ink); }
.rfqf__row { display: grid; grid-template-columns: 1fr 1fr; }
.rfqf__row--1 { grid-template-columns: minmax(0, 1fr); }
.field { display: flex; flex-direction: column; padding: 0.9rem 1rem 0.8rem; border-bottom: 1px solid var(--ink); min-width: 0; }
.rfqf__row .field + .field { border-left: 1px solid var(--ink); }
.field__label { display: flex; justify-content: space-between; gap: 1rem; margin-bottom: 0.45rem; }
.field__label .lbl { color: var(--ink); font-weight: 600; }
.field__hint { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.06em; color: var(--ink-3); }
.field input[type="text"], .field input[type="email"], .field textarea, .field select {
  width: 100%; border: 0; background: transparent; padding: 0.25rem 0; color: var(--ink);
  font-family: var(--font-display); font-size: 1.1rem; font-weight: 600; font-stretch: 92%;
  outline: none; border-bottom: 1px dashed var(--rule);
}
.field input::placeholder, .field textarea::placeholder { color: var(--ink-3); font-weight: 400; }
.field input:focus, .field textarea:focus { border-bottom-color: var(--red); }
.field textarea { resize: vertical; min-height: 9rem; line-height: 1.5; font-weight: 400; font-size: 1.05rem; }
.field--fs { border-top: 0; border-left: 0; border-right: 0; margin: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-top: 0.2rem; }
.chip { position: relative; display: inline-flex; }
.chip input { position: absolute; inset: 0; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.chip span {
  display: inline-block; padding: 0.5em 0.8em; border: 1px solid var(--ink);
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
  transition: background 0.1s, color 0.1s;
}
.chip input:checked + span { background: var(--ink); color: var(--paper); }
.chip input:focus-visible + span { outline: 2px solid var(--red); outline-offset: 2px; }
.chip:hover span { background: var(--red-soft); }
.chip input:checked:hover + span { background: var(--ink); }
.rfqf__foot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 1rem; padding: 1rem; }
.rfqf__foot .lbl { max-width: 34rem; line-height: 1.6; text-transform: none; letter-spacing: 0.03em; font-size: 0.72rem; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-msg { margin-top: 1rem; padding: 1rem 1.1rem; border: 1.5px solid var(--ink); font-stretch: 92%; }
.form-msg[hidden] { display: none; }
.form-msg--ok { border-color: var(--red); }
.form-msg--ok strong { color: var(--red); }
.form-msg__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 0.75rem; }
.form-msg pre { white-space: pre-wrap; font-family: var(--font-mono); font-size: 0.78rem; margin: 0.75rem 0 0; padding: 0.75rem; background: var(--paper-2); max-height: 14rem; overflow: auto; }
.contact__grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.75fr); gap: clamp(1.5rem, 4vw, 3.5rem); margin-top: clamp(1.5rem, 4vw, 3rem); align-items: start; }
.contact__aside { display: grid; gap: 1.5rem; }

/* --------------------------------------------------------------------------
   Misc
   -------------------------------------------------------------------------- */
.split { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; margin-top: clamp(1.5rem, 4vw, 3rem); }
.aside-stack { display: grid; gap: 1.5rem; }
.big-list { list-style: none; margin: 0; padding: 0; border-top: 1.5px solid var(--ink); }
.big-list li { display: grid; grid-template-columns: 4rem 1fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--rule-soft); }
.big-list .lbl { padding-top: 0.35rem; }
.big-list strong { display: block; font-stretch: 88%; font-size: 1.15rem; margin-bottom: 0.2rem; }
.big-list p { color: var(--ink-2); }
.notfound { padding: clamp(3rem, 10vw, 8rem) 0; }
.notfound .phead { border-bottom: 0; }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1400px) {
  .hdr__sheettitle { display: none; }
  .nav__link { padding: 0 0.8rem; }
}

@media (max-width: 1180px) {
  .nav__link { padding: 0 0.7rem; }
  .theme-toggle { padding: 0 0.7rem; }
  .nav__cta { display: none; }
  .hdr__sheettitle { display: none; }
  .hdr__sheet > .lbl { display: none; }
  .hdr__sheet { padding: 0 0.9rem; }
  .brand__name { font-size: 1rem; }
  .brand { padding-right: 0.9rem; }
  .tb {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    grid-template-areas:
      "brand title sheet date"
      "brand drawn rev scale"
      "contact links links links"
      "copy copy copy copy";
  }
  .tb__cell--brand { border-bottom: 1px solid var(--ink); }
  .tb__cell--contact { border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
  .tb__cell--links { border-bottom: 1px solid var(--ink); border-right: 0; }
  .tb__cell:nth-child(5) { border-right: 0; }
  .tb__cell:nth-child(7) { border-right: 0; }
}

@media (max-width: 900px) {
  :root { --hdr-h: 58px; }
  .nav { display: none; }
  .menu-btn { display: block; }
  .hdr { grid-template-columns: auto 1fr auto; }
  .hdr__sheet { padding: 0 0.9rem; }
  .brand { padding-left: calc(var(--gutter) - var(--frame)); padding-right: 0.9rem; }
  .brand__mark { width: 30px; height: 30px; }
  .hero { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .hero__title { font-size: clamp(3rem, 14vw, 6rem); }
  .prod__grid, .split, .contact__grid { grid-template-columns: minmax(0, 1fr); }
  .prod__aside { position: static; }
  .spec--grid { grid-template-columns: minmax(0, 1fr); }
  .spec--grid .spec__item:nth-child(odd) { padding-right: 0; border-right: 0; }
  .spec--grid .spec__item:nth-child(even) { padding-left: 0; }
  .two-col { grid-template-columns: minmax(0, 1fr); }
  .notes--2col .notes__list { columns: 1; }
  .phead { grid-template-columns: minmax(0, 1fr); }
  .phead__aside { align-items: flex-start; flex-direction: row; flex-wrap: wrap; }
  .revs__out { display: none; }
  .revs__stage { width: auto; }
}

@media (max-width: 760px) {
  .shead { flex-wrap: wrap; }
  .shead__note { flex-basis: 100%; white-space: normal; padding-left: 3.1rem; margin-top: -0.4rem; }
  .fig--diagram .fig__cap::after { content: "scroll \2192"; margin-left: auto; font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); }
  .reg thead { display: none; }
  .reg, .reg tbody { display: block; }
  .reg__row { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 0 0.75rem; padding: 0.9rem 0; border-bottom: 1px solid var(--rule-soft); }
  .reg td { display: block; padding: 0; border: 0; }
  .reg__row:hover td { background: transparent; }
  .reg__row:hover { background: var(--red-soft); }
  .reg__no { width: auto; padding-left: 0.5rem !important; }
  .reg__name a { font-size: 1.1rem; }
  .reg__name .reg__what { display: block; color: var(--ink-2); font-size: 0.9rem; margin-top: 0.15rem; }
  .reg td.reg__what-col, .reg td.reg__stack, .reg td.reg__arrow { display: none; }
  .reg__status { width: auto; padding-right: 0.5rem !important; }
  .rfqf__row { grid-template-columns: minmax(0, 1fr); }
  .rfqf__row .field + .field { border-left: 0; }
  .spec__item { grid-template-columns: 3.2rem 1fr; }
  .revs th:last-child, .revs td:last-child { display: none; }
  .tb {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "brand brand"
      "title sheet"
      "date rev"
      "drawn scale"
      "contact contact"
      "links links"
      "copy copy";
  }
  .tb__cell { min-height: 3.6rem; padding: 0.65rem 0.75rem; }
  .tb__cell:nth-child(3), .tb__cell:nth-child(6), .tb__cell:nth-child(7) { border-right: 0; }
  .tb__cell--brand { border-right: 0; }
  .tb__cell--contact { border-right: 0; }
  .prodnav { grid-template-columns: 1fr; }
  .prodnav__next { text-align: left; align-items: flex-start; }
  .bom__layer { width: 7rem; }
  .big-list li { grid-template-columns: 3.2rem 1fr; }
}

@media (max-width: 420px) {
  :root { --frame: 7px; }
  .brand__text { display: none; }
  .hdr__sheetno { font-size: 0.72rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .stamp--lg[data-stamp].is-in { animation: none; }
  * { transition: none !important; }
}

@media print {
  .frame, .hdr, .mnav, .rfq, .nav__cta, .theme-toggle { display: none !important; }
  body { background: #fff; color: #000; }
  .sheet { max-width: none; padding: 0; }
  a { text-decoration: none; }
}