/* Prototyping Academy — vector-display / pen-plotter tech noir.
   One laser red on black. Glow is drop-shadow/text-shadow only — never mix-blend-mode
   (composites to white over blurred layers on GPU browsers). */

@font-face { font-family: "Plex Mono"; src: url("fonts/plex-mono-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url("fonts/plex-mono-600.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Plex Cond"; src: url("fonts/plex-cond-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Plex Cond"; src: url("fonts/plex-cond-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }

:root {
  color-scheme: dark;
  --bg: #050203;
  --panel: #0b0405;
  --laser: #ff2b1c;
  --laser-hot: #ff6a4d;
  --laser-dim: #8a1a12;
  --laser-faint: rgba(255, 43, 28, .14);
  --ink: #f1d7d2;
  --ink-dim: #a88780;
  --glow: 0 0 .35em rgba(255, 43, 28, .55);
  --mono: "Plex Mono", ui-monospace, "DejaVu Sans Mono", monospace;
  --cond: "Plex Cond", "Arial Narrow", sans-serif;
  --gutter: clamp(16px, 4vw, 40px);
}

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

html { background: var(--bg); }
body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(var(--laser-faint) 1px, transparent 1px) 0 0 / 100% 48px,
    linear-gradient(90deg, var(--laser-faint) 1px, transparent 1px) 0 0 / 48px 100%,
    var(--bg);
  background-attachment: fixed;
  color: var(--ink);
  font: 400 15px/1.65 var(--mono);
  overflow-x: hidden;
}

/* CRT scanlines — rgba only, pointer-transparent, above everything. */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(0, 0, 0, .22) 0 1px, transparent 1px 3px);
  z-index: 50;
}

a { color: var(--laser-hot); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover, a:focus-visible { color: #fff; text-shadow: var(--glow); }
:focus-visible { outline: 1px dashed var(--laser); outline-offset: 3px; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: var(--gutter); top: 8px; z-index: 60; background: var(--bg); padding: 4px 8px; }

.dim { color: var(--ink-dim); }
.small { font-size: 12px; }
em { font-style: normal; color: var(--laser-hot); }

/* ---------- masthead ---------- */
.masthead {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 22px var(--gutter) 14px;
  border-bottom: 1px solid var(--laser-dim);
}
.crest { width: 64px; height: 64px; display: block; }
.wordmark p { margin: 0; }
.kicker { font: 500 11px/1.4 var(--cond); letter-spacing: .18em; text-transform: uppercase; color: var(--ink-dim); }
.name {
  font: 700 clamp(26px, 5vw, 44px)/1.05 var(--cond);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--laser);
  text-shadow: var(--glow);
}
.motto { font-size: 13px; color: var(--ink-dim); }
.divergence { width: 280px; height: 76px; display: block; position: relative; z-index: 46; }

nav.primary {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 36px;
  padding: 12px var(--gutter);
  border-bottom: 1px solid var(--laser-dim);
  font: 500 13px/1.6 var(--cond);
  letter-spacing: .16em;
  text-transform: uppercase;
}
nav.primary a { color: var(--ink-dim); text-decoration: none; position: relative; }
/* The current-page marker hangs in the margin, so every label starts on the column edge and none reserves room. */
nav.primary a::before { content: "▸"; color: transparent; position: absolute; left: -1.1em; }
nav.primary a[aria-current="page"] { color: var(--laser); text-shadow: var(--glow); }
nav.primary a[aria-current="page"]::before { color: var(--laser); }

/* ---------- document body ---------- */
main { padding: 28px var(--gutter) 48px; max-width: 1320px; margin: 0 auto; }
main p { max-width: 80ch; }
main p.docid { max-width: none; }
main.wide { max-width: 1180px; }

h1, h2, h3 {
  font-family: var(--cond);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--laser);
  text-shadow: var(--glow);
  line-height: 1.2;
}
h1 { font-size: clamp(22px, 3.4vw, 30px); margin: 0 0 .2em; }
h2 { font-size: 18px; margin: 2.2em 0 .6em; }
h3 { font-size: 15px; margin: 1.6em 0 .4em; }
.docid { font: 500 12px/1.4 var(--cond); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-dim); margin: 0 0 1.6em; }

/* Panel with plotter registration ticks on the corners. */
.panel {
  position: relative;
  margin: 1.8em 0;
  padding: 18px 20px;
  background: rgba(11, 4, 5, .82);
  border: 1px solid var(--laser-dim);
}
.panel::before, .panel::after {
  content: "";
  position: absolute;
  width: 12px; height: 12px;
  border: 1px solid var(--laser);
}
.panel::before { top: -4px; left: -4px; border-right: 0; border-bottom: 0; }
.panel::after { bottom: -4px; right: -4px; border-left: 0; border-top: 0; }
.panel > :first-child { margin-top: 0; }
.panel > :last-child { margin-bottom: 0; }
.panel .label {
  font: 700 11px/1 var(--cond);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--laser);
  margin: 0 0 10px;
}
.panel.warning { border-color: var(--laser); box-shadow: 0 0 18px rgba(255, 43, 28, .18) inset; }

.signature { margin-top: 2em; }
.signature p { margin: 0; }
.signature .who { font: 700 16px/1.4 var(--cond); letter-spacing: .2em; color: var(--laser); }

table.ledger { width: 100%; border-collapse: collapse; font-size: 13px; }
table.ledger th, table.ledger td { text-align: left; padding: 6px 10px 6px 0; border-bottom: 1px dashed var(--laser-dim); vertical-align: top; }
table.ledger th { font: 500 11px/1.4 var(--cond); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-dim); }
table.ledger td.num { font-variant-numeric: tabular-nums; white-space: nowrap; color: var(--laser-hot); }

.status { font: 700 11px/1 var(--cond); letter-spacing: .18em; text-transform: uppercase; padding: 3px 6px; border: 1px solid currentColor; white-space: nowrap; }
.status.sealed { color: var(--laser-dim); }
.status.live { color: var(--laser); }

/* ---------- plotted SVG line art ---------- */
svg.plot { fill: none; stroke: var(--laser); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; filter: drop-shadow(0 0 2px rgba(255, 43, 28, .8)); overflow: visible; }
svg.plot .dim { stroke: var(--laser-dim); }
svg.plot text { fill: var(--laser); stroke: none; font: 500 9px var(--cond); letter-spacing: .12em; text-transform: uppercase; }
svg.plot text.note { fill: var(--ink-dim); }
/* SI units keep their case: uppercasing µ yields Greek capital Mu ("3.0 MM"). */
svg.plot .unit, .unit { text-transform: none; }
/* academy.js sets per-path dash length, then adds .plotting to draw it in. */
svg.plot.armed path, svg.plot.armed rect, svg.plot.armed circle, svg.plot.armed line, svg.plot.armed polyline, svg.plot.armed ellipse { transition: stroke-dashoffset var(--plot-ms, 1600ms) cubic-bezier(.5, 0, .2, 1); }
svg.plot.armed text { opacity: 0; transition: opacity .4s ease var(--plot-ms, 1600ms); }
svg.plot.plotted text { opacity: 1; }

figure.schematic { margin: 2em 0; }
figure.schematic .scroll { overflow-x: auto; }
figure.schematic svg { width: 100%; min-width: 560px; height: auto; display: block; }
figure.schematic figcaption { margin-top: 10px; font: 500 12px/1.5 var(--cond); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-dim); }
figure.schematic figcaption b { color: var(--laser); font-weight: 700; }

/* ---------- catalogue cards (papers / archive) ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.cards .panel { margin: 0; }
.cards h3 { margin-top: 0; font-size: 14px; }

/* ---------- enrolment form (never submits) ---------- */
form.enrol { display: grid; gap: 14px; max-width: 720px; }
form.enrol label { display: grid; gap: 4px; font: 500 12px/1.4 var(--cond); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); }
form.enrol input, form.enrol select {
  font: 400 15px var(--mono);
  color: var(--ink);
  background: #000;
  border: 1px solid var(--laser-dim);
  padding: 8px 10px;
  border-radius: 0;
  width: 100%;
}
form.enrol input:focus, form.enrol select:focus { border-color: var(--laser); outline: none; box-shadow: 0 0 10px rgba(255, 43, 28, .3); }
button.laser {
  justify-self: start;
  font: 700 13px/1 var(--cond);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--laser);
  background: transparent;
  border: 1px solid var(--laser);
  padding: 12px 18px;
  cursor: pointer;
}
button.laser:hover, button.laser:focus-visible { background: var(--laser); color: #000; box-shadow: 0 0 18px rgba(255, 43, 28, .5); }
.verdict { min-height: 3em; white-space: pre-line; }
.verdict:empty { display: none; }

/* ---------- colophon ---------- */
.colophon { padding: 18px var(--gutter) 40px; border-top: 1px solid var(--laser-dim); font-size: 12px; }
.colophon p { margin: 2px 0; }

/* ---------- desktop: content in two columns (menu stays a bar) ----------
   Below 1180 px everything stacks: the plotted figures need ~560 px before their callouts get too small. */
.split, .grid2, .figgrid { display: grid; gap: 28px 64px; }
/* minmax(0, …): a grid column otherwise grows to its widest child's min-content (the 560 px figures) and the page
   overflows sideways on phones; with it, the figures' own .scroll wrappers absorb the width as intended. */
.split, .grid2, .figgrid { grid-template-columns: minmax(0, 1fr); }
.split > .col > :first-child { margin-top: 0; }
.grid2 > .panel, .figgrid > figure { margin: 0; }
@media (min-width: 1180px) {
  .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; }
  .grid2, .figgrid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .split figure.schematic svg, .figgrid figure.schematic svg { min-width: 0; }
  /* Lab: intro | apparatus on the first row, bench | telemetry on the second, panels matched in height. */
  .split.lab-grid { align-items: stretch; }
  .lab-grid > .intro, .lab-grid > figure { align-self: center; }
  /* Summons: the figure and ledger travel beside the (much longer) letter instead of leaving a void. */
  .split > .col.pin { position: sticky; top: 12px; }
}
.lab-grid > .panel, .lab-grid > figure { margin: 0; }
.lab-grid > .telemetry { display: flex; flex-direction: column; }
.lab-grid > .telemetry canvas.chart { flex: 1 1 260px; height: auto; min-height: 260px; }

/* ---------- centred header + menu; the gauge keeps the right edge ---------- */
/* Centring needs room for the gauge on both sides (~1320 px); narrower desktops keep the left-aligned header. */
@media (min-width: 900px) { nav.primary { justify-content: center; } }
@media (min-width: 1320px) {
  .masthead { grid-template-columns: minmax(0, 1fr) auto auto minmax(0, 1fr); }
  .masthead .crest-link { grid-column: 2; }
  .masthead .wordmark { grid-column: 3; text-align: center; }
  .masthead .divergence { grid-column: 4; justify-self: end; }
}

/* ---------- small screens ---------- */
@media (max-width: 640px) {
  .masthead { grid-template-columns: auto 1fr; }
  .divergence { grid-column: 1 / -1; width: 224px; height: 60px; }
  .crest { width: 48px; height: 48px; }
  body { font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  svg.plot.armed path, svg.plot.armed rect, svg.plot.armed circle, svg.plot.armed line,
  svg.plot.armed polyline, svg.plot.armed ellipse, svg.plot.armed text { transition: none; }
}

/* ---------- print: lab reports + "Save as PDF" ---------- */
@media print {
  :root { --ink: #000; --ink-dim: #444; --laser: #000; --laser-hot: #000; --laser-dim: #888; }
  html, body { background: #fff; }
  body::after, body::before, nav.primary, .divergence, .skip, button { display: none; }
  .split, .grid2, .figgrid { display: block; }
  h1, h2, h3, .name, svg.plot { text-shadow: none; filter: none; }
  .panel { background: none; break-inside: avoid; }
  a { color: #000; }
}

/* Field plates: the censor bar and the engine-bay mosaic are the only filled marks. */
svg.plot .bar { fill: var(--laser); }
svg.plot text.bartext { fill: #000; font-size: 8px; letter-spacing: .14em; }
svg.plot .mosaic rect { fill: var(--laser); stroke: var(--laser-dim); }

/* Fig. 1 ejection (academy.js initEject): the slices fly out on fixed overlays so the figure's scroll box can't clip
   them, then the crumbs come back down on a full-viewport canvas. */
svg.plot .hit { fill: transparent; stroke: none; pointer-events: all; cursor: pointer; }
svg.ejecta { position: fixed; z-index: 50; pointer-events: none; }
canvas.crumbs { position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: 60; pointer-events: none; }

/* ---------- laboratory bench ---------- */
form.bench .bench-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px 18px; margin-bottom: 16px; }
form.bench label { display: grid; gap: 4px; font: 500 12px/1.4 var(--cond); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); }
form.bench label[hidden] { display: none; }
form.bench select, form.bench input[type="number"] {
  font: 400 14px var(--mono); color: var(--ink); background: #000;
  border: 1px solid var(--laser-dim); padding: 7px 8px; border-radius: 0; width: 100%;
}
form.bench select:focus, form.bench input:focus { border-color: var(--laser); outline: none; box-shadow: 0 0 10px rgba(255, 43, 28, .3); }
form.bench input[type="range"] { accent-color: var(--laser); width: 100%; }
form.bench output { color: var(--laser-hot); text-transform: none; }
button.laser:disabled { opacity: .45; cursor: progress; }

.apparatus svg .slice { transition: fill .3s linear; }
.apparatus svg .lever { transition: transform .4s ease; }
.apparatus svg .winding { transition: stroke .3s linear, opacity .3s linear; }

dl.readout { display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); gap: 8px 14px; margin: 0 0 12px; }
dl.readout div { border-left: 1px solid var(--laser-dim); padding-left: 8px; }
dl.readout dt { font: 500 10px/1.4 var(--cond); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-dim); }
dl.readout dd { margin: 0; font-variant-numeric: tabular-nums; color: var(--laser-hot); }
canvas.chart { display: block; width: 100%; height: 260px; background: #000; border: 1px solid var(--laser-dim); }
.legend .k { white-space: nowrap; margin-right: 10px; }
.legend .k::before { content: ""; display: inline-block; width: 14px; height: 2px; vertical-align: middle; margin-right: 5px; background: currentColor; }
.k-te { color: #ff6a4d; } .k-tn { color: #ff2b1c; } .k-tf { color: #c4301f; } .k-tc { color: #8a1a12; } .k-i { color: #f1d7d2; }

.report h2 { margin-top: .2em; }
.report .rep-verdict { font-size: 16px; color: var(--ink); border-left: 2px solid var(--laser); padding-left: 12px; }
.report td:first-child { white-space: nowrap; }
.rep-swatch-row { display: flex; align-items: center; gap: 12px; margin: 14px 0; }
.rep-swatch { width: 64px; height: 40px; border: 1px solid var(--laser-dim); display: inline-block; }
.report ul { padding-left: 1.2em; }

@media print {
  form.bench, .apparatus, footer.colophon, .masthead, .lab-intro { display: none; }
  .report[hidden] { display: none; }
  canvas.chart { border-color: #888; }
  .report .rep-verdict { color: #000; border-color: #000; }
  .rep-swatch { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}

/* ---------- "KINDLY DIVERGE LESS": the page dims and flickers until the warning clears ----------
   Overlay is rgba black (never mix-blend-mode). Flicker stays under 3 flashes/s (WCAG 2.3.1) with modest contrast;
   the dimming does the heavy lifting. The readout (z 46) sits above the overlay (z 45) so it stays lit. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 45;
  background: rgba(0, 0, 0, .42);
  opacity: 0;
  transition: opacity 1.2s ease;
}
html.diverging body::before { opacity: 1; animation: pa-flicker 1.7s linear infinite; }
main, nav.primary, .colophon, .wordmark, .crest-link { transition: filter 1.2s ease; }
html.diverging main, html.diverging nav.primary, html.diverging .colophon,
html.diverging .wordmark, html.diverging .crest-link { filter: brightness(.6); transition: filter 3.5s ease-in; }
/* Convergence: divergence reaches zero and the page dims, still, under the last line. */
html.ceased body::before { opacity: 1; animation: none; background: rgba(0, 0, 0, .62); }
html.ceased main, html.ceased nav.primary, html.ceased .colophon, html.ceased .wordmark, html.ceased .crest-link {
  filter: brightness(.45); transition: filter 1.2s ease;
}
.pa-cease {
  position: fixed; inset: 0; z-index: 47; pointer-events: none;
  display: grid; place-content: center; gap: .5em; padding: 0 16px; text-align: center;
  font: 700 clamp(18px, 3vw, 36px)/1.3 var(--cond); letter-spacing: .14em; text-transform: uppercase;
  color: var(--laser); text-shadow: var(--glow);
  /* A pool of black behind the words, so the dimmed page never reads through them. */
  background: radial-gradient(ellipse 60% 40% at center, rgba(0, 0, 0, .88) 0, rgba(0, 0, 0, .6) 55%, transparent 100%);
  opacity: 0; transition: opacity 1.4s ease;
}
.pa-cease p { margin: 0; }
.pa-cease.on { opacity: 1; }
@media (prefers-reduced-motion: reduce) { .pa-cease { transition: none; } }
@keyframes pa-flicker {
  0% { opacity: .8; }
  10% { opacity: 1; }
  12% { opacity: .5; }
  15% { opacity: .95; }
  55% { opacity: .85; }
  58% { opacity: .45; }
  62% { opacity: .9; }
  100% { opacity: .8; }
}