/*
  qcmpy/css/styles.css
  Stylesheet for the QCM-PAK landing and docs pages (index, about,
  examples, install). Self-contained: it no longer layers on the portfolio
  stylesheet at /main/css/styles.css.

  Units (see Josh W. Comeau, "The Surprising Truth About Pixels and
  Accessibility"): rem for anything that should grow when a visitor raises
  their browser's default text size (font sizes, spacing, widths, heights,
  breakpoints); px for borders, hairlines, shadows and small decorative
  marks; ch for text measures; unitless line-height. The root font size is
  never overridden, so 1rem follows the visitor's own setting.
*/

/* -------------------------------------------------------
   Base layer: palette tokens, reset, body defaults
   ------------------------------------------------------- */
:root {
  --paper: #F5F1EA;
  --paper-2: #EDE7DA;
  --paper-3: #E3DCCB;
  --rule: #C9BFA8;
  --ink: #1A1613;
  --ink-2: #3D342B;
  --ink-3: #6B5E4E;

  /* Horizontal page gutter: tighter on phones, roomier on desktop */
  --gutter: clamp(1rem, 4vw, 1.75rem);
  /* Page column: 77.5rem up to a 1440 px window, then widens with it to 96rem */
  --page-max: clamp(77.5rem, 100vw - 12.5rem, 96rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

/* Above a 1440 px window the whole page grows gently, to at most 118% of the
   visitor's own text size at 2560 px. The floor is their size, so browser
   zoom and text-size settings keep working. */
html { font-size: clamp(100%, 100% + (100vw - 90rem) * 0.0026, 118%); }

html, body {
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.label {
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--rule); }

:root {
  --font-mono-qcm: "JetBrains Mono", ui-monospace, monospace;
  --font-serif-qcm: "IBM Plex Serif", Georgia, serif;
  --font-sans-qcm: "IBM Plex Sans", system-ui, sans-serif;

  /* Colour overrides / additions */
  --blue:  #1e3a8a;
  --cyan:  #0891b2;
  --amber: #c9881d;
  --rose:  #b54245;
  --green: #1f7a4d;
  --grid:  rgba(20,23,30,0.06);
  --grid-strong: rgba(20,23,30,0.12);
}

/* -------------------------------------------------------
   Base body overrides
   ------------------------------------------------------- */
body {
  font-family: var(--font-sans-qcm);
  font-size: 0.938rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.mono { font-family: var(--font-mono-qcm); }
.serif { font-family: var(--font-serif-qcm); }

/* -------------------------------------------------------
   QCM Nav / Topbar
   ------------------------------------------------------- */
.qcm-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background: color-mix(in oklab, var(--paper) 85%, transparent);
  border-bottom: 1px solid var(--rule);
}
.qcm-topbar-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0.75rem var(--gutter);
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.qcm-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-mono-qcm);
  font-weight: 700;
  font-size: 0.938rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.qcm-logo { display: block; line-height: 0; }
.qcm-logo svg { display: block; height: 1.75rem; width: auto; }
.qcm-brand-ver { color: var(--ink-3); font-weight: 400; }

.qcm-nav {
  display: flex;
  gap: 1.375rem;
  margin-left: 1rem;
}
.qcm-nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-family: var(--font-mono-qcm);
  font-size: 0.781rem;
  letter-spacing: 0.02em;
  padding: 0.25rem 0;
  border-bottom: 1px dashed transparent;
}
.qcm-nav a:hover { border-bottom-color: var(--ink); color: var(--ink); }
.qcm-nav a.active { color: var(--blue); border-bottom-color: var(--blue); }

.qcm-topbar-right { margin-left: auto; display: flex; gap: 0.625rem; align-items: center; }

.qcm-pill {
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid var(--rule);
  padding: 0.25rem 0.5rem;
  color: var(--ink-3);
  background: var(--paper);
}
.qcm-pill .dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
  margin-right: 6px;
  transform: translateY(-1px);
}

/* -------------------------------------------------------
   QCM Buttons
   ------------------------------------------------------- */
.qcm-btn {
  white-space: nowrap;
  font-family: var(--font-mono-qcm);
  font-size: 0.781rem;
  padding: 0.5rem 0.875rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.01em;
  transition: transform 0.08s ease;
}
.qcm-btn:hover { transform: translateY(-1px); }
.qcm-btn.ghost { background: transparent; color: var(--ink); }
.qcm-btn.ghost:hover { background: var(--ink); color: var(--paper); }

/* -------------------------------------------------------
   QCM Layout
   ------------------------------------------------------- */
.qcm-main {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.qcm-section {
  border-bottom: 1px solid var(--rule);
  padding: 3.5rem 0;
  position: relative;
}
.qcm-section:last-child { border-bottom: none; }

/* crop marks */
.crop {
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--ink);
  border-style: solid;
  border-width: 0;
}
.crop.tl { top: -1px;    left: -1px;   border-top-width: 2px;    border-left-width: 2px; }
.crop.tr { top: -1px;    right: -1px;  border-top-width: 2px;    border-right-width: 2px; }
.crop.bl { bottom: -1px; left: -1px;   border-bottom-width: 2px; border-left-width: 2px; }
.crop.br { bottom: -1px; right: -1px;  border-bottom-width: 2px; border-right-width: 2px; }

/* -------------------------------------------------------
   Section headings
   ------------------------------------------------------- */
.qcm-sec-head {
  display: flex;
  align-items: baseline;
  gap: 1.125rem;
  margin-bottom: 1.75rem;
}
.qcm-sec-head .label {
  font-family: var(--font-mono-qcm);
  font-size: 0.719rem;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-top: 1px solid var(--ink);
  padding-top: 0.375rem;
  min-width: 7.5rem;
}
.qcm-sec-head h2 {
  font-family: var(--font-serif-qcm);
  font-weight: 400;
  letter-spacing: -0.01em;
  font-size: clamp(1.75rem, 1.2rem + 1.6vw, 2.5rem);
  margin: 0;
}

/* -------------------------------------------------------
   Hero
   ------------------------------------------------------- */
.qcm-hero {
  padding-top: clamp(2.5rem, 6vw, 4rem);
  padding-bottom: 3rem;
  display: grid;
  grid-template-columns: minmax(0, 35fr) minmax(0, 65fr);
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: center;
}
/* Pinned to the top of the frame: the figure changes height as the simulator
   runs (warning note, wrapping readouts), and centring would make the text jump */
.qcm-hero-text { container-type: inline-size; align-self: start; }
.qcm-meta-row {
  white-space: pre-wrap;
  font-family: var(--font-mono-qcm);
  font-size: 0.719rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1.375rem;
}
h1.qcm-title {
  font-family: var(--font-serif-qcm);
  font-weight: 400;
  font-size: clamp(2.25rem, 1.4rem + 2.6vw, 3.5rem);
  /* Sized by the text column, so "into ALP kinetics." (about 8 em wide) stays on one
     line beside the wide figure; the vw term keeps phones at the old size. */
  font-size: clamp(2.25rem, min(11.5cqi, 1.4rem + 2.6vw), 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem 0;
  max-width: 16ch;
}
h1.qcm-title em { font-style: italic; color: var(--blue); }

.qcm-lede {
  font-size: 1.125rem;
  line-height: 1.55;
  max-width: 52ch;
  color: var(--ink-2);
}
.qcm-cta-row {
  margin-top: 1.75rem;
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}
.qcm-install-snip {
  margin-top: 1.375rem;
  border: 1px solid var(--rule);
  background: var(--paper-2);
  padding: 0.625rem 0.875rem;
  font-family: var(--font-mono-qcm);
  font-size: 0.812rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: 28.75rem;
}
.qcm-install-snip .prompt { color: var(--cyan); user-select: none; }
.qcm-install-snip .copy {
  margin-left: auto;
  font-size: 0.656rem;
  padding: 0.125rem 0.375rem;
  border: 1px solid var(--rule);
  color: var(--ink-3);
  background: var(--paper);
  cursor: pointer;
  letter-spacing: 0.04em;
}
.qcm-install-snip .copy:hover { color: var(--ink); border-color: var(--ink); }

/* -------------------------------------------------------
   Hero plot
   ------------------------------------------------------- */
.qcm-hero-plot {
  border: 1px solid var(--ink);
  background: var(--paper);
  position: relative;
  display: flex;
  flex-direction: column;
  margin: 0;
}
.qcm-hero-plot .plot-head {
  border-bottom: 1px solid var(--rule);
  padding: 0.625rem 0.875rem;
  display: flex;
  gap: 0.875rem;
  align-items: center;
  font-family: var(--font-mono-qcm);
  font-size: 0.719rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.qcm-hero-plot .plot-head .axis-tag { color: var(--ink); }
.qcm-hero-plot .plot-head .right { margin-left: auto; }
.qcm-hero-plot svg.plot { flex: 1; width: 100%; height: 100%; display: block; }
.qcm-legend {
  border-top: 1px solid var(--rule);
  padding: 0.625rem 0.875rem;
  display: flex;
  gap: 1.375rem;
  flex-wrap: wrap;
  font-family: var(--font-mono-qcm);
  font-size: 0.719rem;
}
.qcm-legend .swatch {
  display: inline-block;
  width: 14px;
  height: 2px;
  vertical-align: middle;
  margin-right: 8px;
}
.qcm-legend .dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  vertical-align: middle;
  margin-right: 6px;
  border-radius: 50%;
}

/* -------------------------------------------------------
   Three-up feature cells
   ------------------------------------------------------- */
.qcm-three-up {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--rule);
}
.qcm-three-up .cell {
  padding: 1.75rem 1.625rem;
  border-right: 1px solid var(--rule);
  background: var(--paper);
  position: relative;
}
.qcm-three-up .cell:last-child { border-right: none; }
.qcm-three-up .cell .num {
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  color: var(--ink-3);
  letter-spacing: 0.06em;
}
.qcm-three-up .cell h3 {
  font-family: var(--font-serif-qcm);
  font-weight: 500;
  font-size: 1.375rem;
  margin: 0.5rem 0 0.625rem 0;
  letter-spacing: -0.01em;
}
.qcm-three-up .cell p { color: var(--ink-2); margin: 0; font-size: 0.906rem; }
.qcm-three-up .cell .micro-plot {
  margin-top: 1.125rem;
  height: 5.5rem;
  border-top: 1px dashed var(--rule);
  padding-top: 0.75rem;
}

/* -------------------------------------------------------
   Pipeline
   ------------------------------------------------------- */
.qcm-pipeline {
  border: 1px solid var(--rule);
  background: var(--paper);
  display: grid;
  grid-template-columns: 13.75rem 1fr;
}
.qcm-pipeline-steps { border-right: 1px solid var(--rule); }
.qcm-pstep {
  width: 100%;
  padding: 1.125rem 1.25rem;
  border: 0;
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
  display: flex;
  gap: 0.875rem;
  align-items: baseline;
  background: var(--paper);
  text-align: left;
  font: inherit;
  color: inherit;
}
.qcm-pstep:hover:not(.active) { background: var(--paper-2); }
.qcm-pstep:focus-visible { outline: 2px solid var(--blue); outline-offset: -2px; }
.qcm-pstep:last-child { border-bottom: none; }
.qcm-pstep .idx {
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  color: var(--ink-3);
  padding-top: 0.125rem;
}
.qcm-pstep .ttl {
  font-family: var(--font-mono-qcm);
  font-size: 0.812rem;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.qcm-pstep.active { background: var(--ink); color: var(--paper); }
.qcm-pstep.active .idx,
.qcm-pstep.active .ttl { color: var(--paper); }
.qcm-pipeline-detail { padding: 1.625rem 1.75rem; min-height: 23.75rem; }
.qcm-pdetail h4 {
  font-family: var(--font-mono-qcm);
  font-size: 0.719rem;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 0.375rem 0;
}
.qcm-pdetail h3 {
  font-family: var(--font-serif-qcm);
  font-weight: 500;
  font-size: 1.625rem;
  margin: 0 0 0.75rem 0;
  letter-spacing: -0.01em;
}
.qcm-pdetail p { color: var(--ink-2); max-width: 60ch; margin: 0 0 1rem 0; }
.qcm-pdetail .canvas {
  border: 1px solid var(--rule);
  background: var(--paper-2);
  aspect-ratio: 600 / 220;
  position: relative;
}
.qcm-pdetail .canvas svg { width: 100%; height: 100%; display: block; }

/* -------------------------------------------------------
   Two-column science block
   ------------------------------------------------------- */
.qcm-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--rule);
}
.qcm-two-col > div { padding: 2rem 2rem; }
.qcm-two-col > div:first-child {
  border-right: 1px solid var(--rule);
  background: var(--paper);
}
.qcm-two-col h3 {
  font-family: var(--font-serif-qcm);
  font-weight: 500;
  font-size: 1.5rem;
  margin: 0 0 0.75rem 0;
  letter-spacing: -0.01em;
}
.qcm-two-col p { color: var(--ink-2); margin: 0 0 0.75rem 0; }
.qcm-two-col .recipe {
  margin-top: 0.5rem;
  font-family: var(--font-mono-qcm);
  font-size: 0.781rem;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 0.875rem 1rem;
}
.qcm-two-col .recipe .row { display: flex; gap: 0.75rem; padding: 0.25rem 0; }
.qcm-two-col .recipe .row .k { color: var(--ink-3); width: 11.25rem; }
.qcm-two-col .recipe .row .v { color: var(--ink); }

/* -------------------------------------------------------
   Final CTA block
   ------------------------------------------------------- */
.qcm-end-cta {
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding: 3rem 2.5rem;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.qcm-end-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 8px 8px;
  pointer-events: none;
}
.qcm-end-cta h2 {
  font-family: var(--font-serif-qcm);
  font-weight: 400;
  font-size: clamp(1.75rem, 1.2rem + 1.6vw, 2.5rem);
  margin: 0 0 0.875rem 0;
  letter-spacing: -0.01em;
  position: relative;
}
.qcm-end-cta p {
  color: rgba(255,255,255,0.75);
  max-width: 50ch;
  margin: 0 0 1.375rem 0;
  position: relative;
}
.qcm-end-cta .qcm-btn {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
  position: relative;
}
.qcm-end-cta .qcm-btn.ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--paper);
}
.qcm-end-cta .qcm-btn.ghost:hover { background: var(--paper); color: var(--ink); }
.qcm-end-cta .right-art { position: relative; }

/* -------------------------------------------------------
   Footer
   ------------------------------------------------------- */
.qcm-footer {
  padding: 1.75rem var(--gutter);
  font-family: var(--font-mono-qcm);
  font-size: 0.719rem;
  color: var(--ink-3);
  border-top: 1px solid var(--rule);
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  max-width: var(--page-max);
  margin: 0 auto;
}
.qcm-footer a {
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px dashed var(--rule);
  padding-bottom: 0.062rem;
}
.qcm-footer a:hover { color: var(--ink); border-color: var(--ink); }
.qcm-footer .right { margin-left: auto; }

/* -------------------------------------------------------
   Inner page header
   ------------------------------------------------------- */
.qcm-inner-header {
  padding: 3.5rem 0 1.75rem;
  border-bottom: 1px solid var(--rule);
}
.qcm-inner-meta {
  font-family: var(--font-mono-qcm);
  font-size: 0.719rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.875rem;
}
h1.qcm-inner-title {
  font-family: var(--font-serif-qcm);
  font-weight: 400;
  font-size: clamp(2.25rem, 1.4rem + 2.4vw, 3.5rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 1.125rem;
}
h1.qcm-inner-title em { color: var(--blue); font-style: italic; }
.qcm-inner-lede {
  font-size: 1.125rem;
  max-width: 65ch;
  color: var(--ink-2);
  margin: 0;
}

/* -------------------------------------------------------
   About page
   ------------------------------------------------------- */
.qcm-author-grid {
  margin-top: 2.25rem;
  display: grid;
  grid-template-columns: 17.5rem 1fr;
  gap: 2.5rem;
  align-items: start;
}
.qcm-portrait {
  border: 1px solid var(--ink);
  background: var(--paper-2);
  aspect-ratio: 4/5;
  position: relative;
  overflow: hidden;
}
.qcm-portrait .stripes {
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(45deg, transparent 0 8px, rgba(20,23,30,0.06) 8px 9px);
}
.qcm-portrait .label {
  position: absolute;
  bottom: 0.875rem;
  left: 0.875rem;
  right: 0.875rem;
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  color: var(--ink-3);
  padding-top: 0.5rem;
  border-top: 1px solid var(--ink);
  display: flex;
  justify-content: space-between;
}
.qcm-portrait .glyph {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono-qcm);
  font-size: 4rem;
  color: var(--ink);
  letter-spacing: -0.04em;
}
.qcm-portrait .role {
  position: absolute;
  top: 0.875rem;
  left: 0.875rem;
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.qcm-bio h2 {
  font-family: var(--font-serif-qcm);
  font-weight: 500;
  font-size: 1.75rem;
  margin: 0 0 0.75rem;
  letter-spacing: -0.01em;
}
.qcm-bio p { color: var(--ink-2); max-width: 65ch; margin: 0 0 0.875rem; }
.qcm-bio .quote {
  font-family: var(--font-serif-qcm);
  font-style: italic;
  font-size: 1.375rem;
  line-height: 1.4;
  color: var(--ink);
  border-left: 2px solid var(--blue);
  padding: 0.5rem 0 0.5rem 1.125rem;
  margin: 1.375rem 0;
  max-width: 56ch;
}
.qcm-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  margin-top: 1.125rem;
  font-family: var(--font-mono-qcm);
  font-size: 0.781rem;
}
.qcm-facts .row {
  display: flex;
  gap: 0.875rem;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--rule);
  background: #fff;
}
.qcm-facts .row .k { color: var(--ink-3); width: 6.875rem; }

.qcm-journey {
  margin-top: 3.5rem;
  border: 1px solid var(--rule);
  background: #fff;
  padding: 1.75rem 1.875rem;
}
.qcm-journey .lbl {
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.qcm-journey h2 {
  font-family: var(--font-serif-qcm);
  font-weight: 500;
  font-size: 1.75rem;
  margin: 0.375rem 0 1.125rem;
  letter-spacing: -0.01em;
}
.qcm-timeline {
  display: grid;
  grid-template-columns: 5.625rem 1fr;
  row-gap: 1.125rem;
  column-gap: 1.375rem;
  align-items: baseline;
  font-family: var(--font-mono-qcm);
}
.qcm-timeline .yr {
  color: var(--blue);
  font-size: 0.812rem;
  padding-top: 0.25rem;
  border-top: 1px solid var(--blue);
}
.qcm-timeline .ev {
  font-size: 0.875rem;
  color: var(--ink-2);
  padding-top: 0.25rem;
  border-top: 1px solid var(--rule);
}
.qcm-timeline .ev b {
  color: var(--ink);
  font-family: var(--font-sans-qcm);
  font-weight: 500;
  display: block;
  margin-bottom: 0.25rem;
}

.qcm-citations { margin-top: 3.5rem; }
.qcm-citations h2 {
  font-family: var(--font-serif-qcm);
  font-weight: 500;
  font-size: 1.75rem;
  margin: 0 0 0.875rem;
  letter-spacing: -0.01em;
}
.qcm-cite {
  padding: 1.125rem 1.25rem;
  border: 1px solid var(--rule);
  background: #fff;
  margin-bottom: 0.625rem;
  font-family: var(--font-mono-qcm);
  font-size: 0.781rem;
  line-height: 1.7;
  color: var(--ink-2);
}
.qcm-cite .tag {
  display: inline-block;
  padding: 0.062rem 0.375rem;
  border: 1px solid var(--rule);
  color: var(--ink-3);
  font-size: 0.656rem;
  letter-spacing: 0.04em;
  margin-right: 0.5rem;
}
.qcm-cite .ttl { color: var(--ink); overflow-wrap: anywhere; }
.qcm-cite .doi { color: var(--blue); }
.qcm-cite-copy {
  margin-left: 0.75rem;
  font-family: var(--font-mono-qcm);
  font-size: 0.656rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.125rem 0.5rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink-2);
  cursor: pointer;
}
.qcm-cite-copy:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.qcm-cite-note { color: var(--ink-3); font-size: 0.875rem; margin: 0.75rem 0 0; }
.qcm-bio-sub { font-family: var(--font-mono-qcm); font-size: 0.781rem; color: var(--ink-3); margin-top: -0.375rem; }
.qcm-ack-small { color: rgba(246,244,236,0.6); font-family: var(--font-mono-qcm); font-size: 0.75rem; }

.qcm-ack {
  margin-top: 3.5rem;
  padding: 1.75rem 1.875rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
.qcm-ack .lbl {
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  color: rgba(246,244,236,0.6);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  position: relative;
}
.qcm-ack h2 {
  font-family: var(--font-serif-qcm);
  font-weight: 400;
  font-size: 1.75rem;
  margin: 0.375rem 0 0.875rem;
  letter-spacing: -0.01em;
  position: relative;
}
.qcm-ack p {
  color: rgba(246,244,236,0.85);
  max-width: 60ch;
  margin: 0 0 0.75rem;
  position: relative;
}

/* -------------------------------------------------------
   Install page
   ------------------------------------------------------- */
.qcm-layout {
  margin-top: 2.25rem;
  display: grid;
  grid-template-columns: 13.75rem 1fr;
  gap: 2.5rem;
  align-items: start;
}
.qcm-toc {
  position: sticky;
  top: 5rem;
  font-family: var(--font-mono-qcm);
  font-size: 0.75rem;
}
.qcm-toc .label {
  color: var(--ink-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.688rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--ink);
  margin-bottom: 0.625rem;
}
.qcm-toc a {
  display: block;
  color: var(--ink-3);
  text-decoration: none;
  padding: 0.25rem 0;
}
.qcm-toc a:hover { color: var(--ink); }

.qcm-install-section {
  padding: 1.875rem 0;
  border-bottom: 1px solid var(--rule);
}
.qcm-install-section:last-child { border-bottom: none; }
.qcm-install-section h2 {
  font-family: var(--font-serif-qcm);
  font-weight: 500;
  font-size: 1.75rem;
  margin: 0 0 0.875rem;
  letter-spacing: -0.01em;
}
.qcm-install-section h2 .num {
  font-family: var(--font-mono-qcm);
  font-size: 0.75rem;
  color: var(--ink-3);
  margin-right: 0.75rem;
  vertical-align: middle;
  letter-spacing: 0.08em;
}
.qcm-install-section p { color: var(--ink-2); max-width: 70ch; margin: 0 0 0.75rem; }

.qcm-code {
  font-family: var(--font-mono-qcm);
  font-size: 0.812rem;
  line-height: 1.7;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  padding: 1rem 1.125rem;
  margin: 0.875rem 0 1.125rem;
  overflow-x: auto;
  position: relative;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.qcm-code .c { color: #8a92a3; }
.qcm-code .b { color: #6cf5b3; }
.qcm-code .a { color: #f5b53a; }
.qcm-code .copy {
  position: absolute;
  top: 0.5rem;
  right: 0.625rem;
  font-size: 0.656rem;
  padding: 0.125rem 0.375rem;
  background: transparent;
  color: rgba(246,244,236,0.6);
  border: 1px solid rgba(246,244,236,0.2);
  cursor: pointer;
  font-family: var(--font-mono-qcm);
}

.qcm-req-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.625rem;
  font-family: var(--font-mono-qcm);
  font-size: 0.781rem;
}
.qcm-req-grid .row {
  display: flex;
  gap: 0.875rem;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--rule);
  background: #fff;
}
.qcm-req-grid .row .k { color: var(--ink-3); width: 6.875rem; }
.qcm-req-grid .row .v { color: var(--ink); }
.qcm-req-grid .row .v .ok { color: var(--green); }

.qcm-platforms {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 14rem), 1fr));
  gap: 0.625rem;
  margin-bottom: 0.75rem;
}
.qcm-plat {
  padding: 0.875rem 1rem;
  border: 1px solid var(--rule);
  background: #fff;
  cursor: pointer;
  font-family: var(--font-mono-qcm);
  font-size: 0.781rem;
}
.qcm-plat.active {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}
.qcm-plat .k {
  color: var(--ink-3);
  font-size: 0.688rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: block;
}
.qcm-plat.active .k { color: rgba(246,244,236,0.6); }
button.qcm-plat { text-align: left; color: var(--ink); }
button.qcm-plat.active { color: var(--paper); }
.qcm-plat:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

/* Install page: captioned code blocks, API table, tags, inline links */
.qcm-codefig { margin: 0 0 0.875rem; max-width: 52rem; }
.qcm-codefig figcaption {
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.312rem;
}
.qcm-codefig .qcm-code { margin: 0; }
.qcm-codefig.output .qcm-code {
  background: var(--paper-2);
  color: var(--ink);
  border: 1px dashed var(--rule);
}
.qcm-api-grid { grid-template-columns: minmax(0, 1fr); max-width: 52rem; margin-bottom: 1rem; }
.qcm-api-grid .row { flex-wrap: wrap; gap: 0.25rem 0.875rem; }
.qcm-api-grid .row .k { width: auto; flex: 0 1 15rem; color: var(--ink); }
.qcm-api-grid .row .v { flex: 1 1 18rem; }
.qcm-api-grid .row .v { color: var(--ink-2); font-family: var(--font-sans-qcm); }
.qcm-tag {
  margin-left: 0.75rem;
  padding: 0.125rem 0.5rem;
  border: 1px solid var(--amber);
  color: var(--ink-2);
  font-family: var(--font-mono-qcm);
  font-size: 0.656rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  vertical-align: middle;
}
.qcm-link { color: var(--blue); text-decoration: underline; text-underline-offset: 2px; }

.qcm-callout {
  padding: 1.125rem 1.375rem;
  border: 1px solid var(--green);
  background: color-mix(in oklab, var(--green) 5%, var(--paper));
  margin: 1.5rem 0 0;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.qcm-callout .cl-label {
  font-family: var(--font-mono-qcm);
  font-size: 0.656rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.312rem;
}
.qcm-callout p { color: var(--ink-2); margin: 0; max-width: 65ch; }

/* -------------------------------------------------------
   Examples page
   ------------------------------------------------------- */
.qcm-examples-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border: 1px solid var(--rule);
  margin-top: 2.25rem;
}
.qcm-ex-card {
  padding: 1.625rem 1.625rem;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: #fff;
  position: relative;
}
.qcm-ex-card:nth-child(2n) { border-right: none; }
.qcm-ex-card:nth-last-child(-n+2) { border-bottom: none; }
.qcm-ex-card .label {
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.qcm-ex-card h3 {
  font-family: var(--font-serif-qcm);
  font-weight: 500;
  font-size: 1.5rem;
  margin: 0.5rem 0 0.625rem;
  letter-spacing: -0.01em;
}
.qcm-ex-card p { color: var(--ink-2); margin: 0 0 0.875rem; font-size: 0.875rem; }
.qcm-ex-card .plot {
  height: 10rem;
  border: 1px solid var(--rule);
  background: var(--paper-2);
  margin-bottom: 0.875rem;
}
.qcm-ex-card .plot svg { width: 100%; height: 100%; display: block; }
.qcm-pkv {
  font-family: var(--font-mono-qcm);
  font-size: 0.75rem;
  color: var(--ink-2);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem 1rem;
  margin-bottom: 1rem;
}
.qcm-pkv .k { color: var(--ink-3); }
.qcm-ex-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.qcm-case-study {
  margin-top: 3.5rem;
  border: 1px solid var(--ink);
  background: #fff;
  padding: 2rem 2rem;
  position: relative;
}
.qcm-case-study .label {
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.qcm-case-study h2 {
  font-family: var(--font-serif-qcm);
  font-weight: 500;
  font-size: 2rem;
  margin: 0.375rem 0 1.125rem;
  letter-spacing: -0.01em;
}
.qcm-cs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
  align-items: start;
}
.qcm-cs-grid .plot {
  height: 17.5rem;
  border: 1px solid var(--rule);
  background: var(--paper-2);
}
.qcm-cs-grid .plot svg { width: 100%; height: 100%; display: block; }

/* Examples: data-driven cards, charts and true-vs-recovered tables */
.qcm-cs-grid .plot { height: auto; padding: 0.5rem; }
.qcm-cs-grid .plot svg { height: auto; }
.ex-recipe { font-family: var(--font-mono-qcm); font-size: 0.719rem; color: var(--ink-3); margin: -0.25rem 0 0.75rem; }
.ex-fig { margin: 0 0 0.875rem; border: 1px solid var(--rule); background: var(--paper-2); padding: 0.5rem 0.625rem 0.25rem; }
.ex-fig figcaption { font-family: var(--font-mono-qcm); font-size: 0.656rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }
.ex-strip { display: block; width: 100%; height: 2.75rem; margin: 0.125rem 0 0.5rem; }
.ex-strip path { fill: none; stroke: var(--ink-2); stroke-width: 1.2; }
.ex-chart { display: block; width: 100%; height: auto; }
.ex-chart .grid line { stroke: var(--rule); stroke-width: 0.6; stroke-dasharray: 2 4; }
.ex-chart text { font-family: var(--font-mono-qcm); font-size: 10px; fill: var(--ink-3); }
.ex-chart .pt { fill: var(--ink-3); opacity: 0.7; }
.ex-chart .fit { fill: none; stroke: var(--blue); stroke-width: 1.8; }
.ex-chart .truth { fill: none; stroke: var(--amber); stroke-width: 1.6; stroke-dasharray: 4 3; }
.ex-chart .legend text { fill: var(--ink-2); }
.ex-chart .t95 { stroke: var(--ink-3); stroke-width: 0.8; stroke-dasharray: 2 3; }
.ex-chart .err { stroke: var(--ink-2); stroke-width: 1.2; }
.ex-chart .run { fill: var(--rose); stroke: var(--paper); stroke-width: 1; }
.ex-results { font-family: var(--font-mono-qcm); font-size: 0.75rem; margin-bottom: 0.875rem; }
.ex-results .hd, .ex-results .rw { display: grid; grid-template-columns: minmax(6rem, 1.1fr) minmax(0, 1.2fr) minmax(0, 1.2fr); gap: 0.25rem 0.75rem; padding: 0.3rem 0; }
.ex-results .hd { color: var(--ink-3); font-size: 0.656rem; letter-spacing: 0.06em; text-transform: uppercase; border-bottom: 1px solid var(--rule); }
.ex-results .rw { border-bottom: 1px dashed var(--rule); color: var(--ink); }
.ex-results .rw .k { color: var(--ink-3); }
.ex-results .rw .bad { color: var(--rose); }
.ex-results .flag { margin-top: 0.4rem; color: var(--rose); }
.ex-results .units { margin-top: 0.4rem; color: var(--ink-3); font-size: 0.656rem; }
.cs-body { color: var(--ink-2); margin: 0 0 0.875rem; max-width: 52ch; }
.cs-note { color: var(--ink-3); font-size: 0.875rem; margin: 0.875rem 0 0.5rem; max-width: 52ch; }
.cs-files { display: flex; flex-wrap: wrap; gap: 0.25rem 0.875rem; font-family: var(--font-mono-qcm); font-size: 0.75rem; }
.cs-files a { color: var(--blue); }
.qcm-code.ex-output { background: var(--paper-2); color: var(--ink); border: 1px dashed var(--rule); }
#python p { overflow-wrap: anywhere; }   /* the pip install line is one long word */
.qcm-findings {
  font-family: var(--font-mono-qcm);
  font-size: 0.781rem;
  line-height: 1.8;
  color: var(--ink-2);
}
.qcm-findings .row {
  display: flex;
  gap: 0.875rem;
  padding: 0.375rem 0;
  border-bottom: 1px dashed var(--rule);
}
.qcm-findings .row .k { color: var(--ink-3); width: 11.25rem; }
.qcm-findings .row .v { color: var(--ink); }

.qcm-content-section {
  margin-top: 3.5rem;
  border: 1px solid var(--rule);
  background: #fff;
  padding: 2rem 2rem;
}
.qcm-content-section .label {
  font-family: var(--font-mono-qcm);
  font-size: 0.688rem;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.375rem;
}
.qcm-content-section h2 {
  font-family: var(--font-serif-qcm);
  font-weight: 500;
  font-size: 1.75rem;
  margin: 0.375rem 0 0.875rem;
  letter-spacing: -0.01em;
}
.qcm-content-section p { color: var(--ink-2); max-width: 70ch; margin: 0 0 0.75rem; }

.qcm-ds-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.375rem;
  margin: 1rem 0 1.25rem;
}
.qcm-ds-row {
  font-family: var(--font-mono-qcm);
  font-size: 0.781rem;
  display: flex;
  gap: 0.875rem;
  padding: 0.5rem 0.875rem;
  border: 1px solid var(--rule);
  background: #fff;
}
.qcm-ds-k { color: var(--ink-3); width: 8.125rem; flex-shrink: 0; }

.qcm-cta-banner {
  margin-top: 1.75rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--blue);
  background: color-mix(in oklab, var(--blue) 6%, var(--paper));
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.qcm-cta-banner .cta-label {
  font-family: var(--font-mono-qcm);
  font-size: 0.656rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.25rem;
}
.qcm-cta-banner .cta-text {
  font-family: var(--font-serif-qcm);
  font-size: 1.125rem;
  color: var(--ink);
}
.qcm-cta-banner .cta-right { margin-left: auto; }

.qcm-ic {
  font-family: var(--font-mono-qcm);
  font-size: 0.812rem;
  background: var(--paper-2);
  padding: 0.062rem 0.312rem;
}

/* -------------------------------------------------------
   Hero simulator (js/ald-mini.jsx)
   ------------------------------------------------------- */
.qcm-hero > * { min-width: 0; }
.ald-mini .plot-head { flex-wrap: wrap; row-gap: 0.375rem; }
.ald-mini .plot-head .right { font-variant-numeric: tabular-nums; }
.ald-mini-now {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-width: 9ch;
  white-space: nowrap;
  color: var(--ink);
}
.ald-mini-now i { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--ink-3); }
.ald-mini-now.gas-a i { background: var(--blue); }
.ald-mini-now.gas-b i { background: var(--rose); }
.ald-mini-btn,
.ald-mini-mode button {
  font: inherit;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.125rem 0.5rem;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
}
.ald-mini-btn:hover,
.ald-mini-mode button:hover { background: var(--ink); color: var(--paper); }
.ald-mini-mode { display: inline-flex; }
.ald-mini-mode button + button { border-left: 0; }
.ald-mini-mode button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.ald-mini-btn:focus-visible,
.ald-mini-mode button:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

/* plot */
.ald-mini-svg { width: 100%; height: auto; display: block; }
.ald-mini-svg .grid line { stroke: var(--rule); stroke-width: 0.6; }
.ald-mini-svg .grid line.minor { stroke-dasharray: 2 4; }
.ald-mini-svg text { font-family: var(--font-mono-qcm); }
.ald-mini-svg .ticks text { font-size: 13px; fill: var(--ink-3); }
.ald-mini-svg .ticks .axis-title { font-size: 12px; }
.ald-mini-svg .lane-card.gas-a rect { fill: var(--blue); }
.ald-mini-svg .lane-card.gas-b rect { fill: var(--rose); }
.ald-mini-svg .lane-card text { fill: var(--paper); }
.ald-mini-svg .lane-card .letter { font-size: 13px; font-weight: 700; }
.ald-mini-svg .lane-card .sub { font-size: 7px; }
.ald-mini-svg .grid line.zero { stroke: var(--ink-3); stroke-width: 0.8; }
.ald-mini-svg path { fill: none; stroke-linejoin: round; }
.ald-mini-svg .trace-a { stroke: var(--blue); stroke-width: 1.6; }
.ald-mini-svg .trace-b { stroke: var(--rose); stroke-width: 1.6; }
.ald-mini-svg .trace-mass { stroke: var(--ink); stroke-width: 2; }
.ald-mini-svg .trace-mass.ghost { stroke: var(--rule); stroke-width: 1.4; }
.ald-mini-svg .cursor { stroke: var(--ink); stroke-width: 1; stroke-dasharray: 3 3; }

/* reactor column: gas cell, gas streaks, film */
.ald-mini-svg .column .outline { fill: none; stroke: var(--rule); stroke-width: 0.8; }
.ald-mini-svg .gas-letter { font-size: 13px; font-weight: 700; fill: var(--ink-3); }
.ald-mini-svg .gas-letter.long { font-size: 10px; }
.ald-mini-svg .gas-letter.gas-a { fill: var(--blue); }
.ald-mini-svg .gas-letter.gas-b { fill: var(--rose); }
.ald-mini-svg .streak { stroke-width: 1.6; stroke-linecap: round; }
.ald-mini-svg .streak.gas-a { stroke: var(--blue); }
.ald-mini-svg .streak.gas-b { stroke: var(--rose); }
.ald-mini-svg .streak.gas-n { stroke: var(--ink-3); stroke-width: 1; opacity: 0.55; }
.ald-mini-svg .streak-head.gas-a { fill: var(--blue); }
.ald-mini-svg .streak-head.gas-b { fill: var(--rose); }
.ald-mini-svg .streak-head.gas-n { fill: var(--ink-3); opacity: 0.55; }
.ald-mini-svg .column .electrode { fill: var(--amber); }
.ald-mini-svg .column .band { fill: var(--paper-3); stroke: var(--paper); stroke-width: 0.6; }
.ald-mini-svg .column .band.alt { fill: color-mix(in oklab, var(--paper-3) 70%, var(--ink-3)); }
.ald-mini-svg .column .lead { stroke: var(--ink-3); stroke-width: 0.8; stroke-dasharray: 1 3; }

/* rows under the plot */
.ald-mini-controls,
.ald-mini-readouts,
.ald-mini-foot {
  border-top: 1px solid var(--rule);
  padding: 0.625rem 0.875rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  font-family: var(--font-mono-qcm);
  font-size: 0.75rem;
  color: var(--ink-2);
}
.ald-mini-controls { gap: 0.75rem 1.75rem; }
.ald-mini-readouts b { color: var(--ink); font-weight: 500; font-variant-numeric: tabular-nums; }
.ald-mini-foot { align-items: center; justify-content: space-between; }
.ald-mini-note { font-family: var(--font-sans-qcm); color: var(--ink-3); }
.ald-mini-slow { display: inline-flex; gap: 0.375rem; align-items: center; cursor: pointer; white-space: nowrap; }
.ald-mini-slow input { accent-color: var(--blue); margin: 0; }

/* cross deposition: pop-up over the plot, standing note under the readouts, hatched film */
.ald-mini-plot { position: relative; }
.ald-mini-pop {
  position: absolute;
  top: calc(124 / 300 * 100% + 0.375rem);
  left: calc(64 / 640 * 100% + 0.5rem);
  max-width: calc(100% * 508 / 640 - 1rem);
  padding: 0.375rem 0.625rem;
  border: 1px solid var(--amber);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono-qcm);
  font-size: 0.75rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  box-shadow: 2px 2px 0 color-mix(in oklab, var(--amber) 35%, transparent);
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}
.ald-mini-pop::before { content: "▲ "; color: var(--amber); }
.ald-mini-pop.show { opacity: 1; }
/* ALE steps down from the zero line near the top, so its empty corner is the bottom-left
   (mass panel bottom = 266 / 300 of the plot) */
.ald-mini[data-mode="ale"] .ald-mini-pop { top: auto; bottom: calc(34 / 300 * 100% + 0.375rem); }
.ald-mini-warn {
  border-top: 1px solid var(--rule);
  padding: 0.625rem 0.875rem;
  background: color-mix(in oklab, var(--amber) 12%, var(--paper));
  font-size: 0.8125rem;
  color: var(--ink);
}
.ald-mini-warn b::before { content: "▲ "; color: var(--amber); }
.ald-mini-readouts .cross { color: var(--ink-3); }
.ald-mini-svg .off-scale { font-size: 12px; fill: var(--ink); paint-order: stroke; stroke: var(--paper); stroke-width: 4px; }
.ald-mini-svg .hatch-bg { fill: color-mix(in oklab, var(--amber) 22%, var(--paper)); }
.ald-mini-svg .hatch { fill: var(--amber); }
.ald-mini-svg .column .band.cross { fill: url(#ald-mini-cross); stroke: none; }
.ald-mini-svg .column .etched { fill: none; stroke: var(--ink-3); stroke-width: 0.8; stroke-dasharray: 2 2; }

/* one control per gas: pulse handle above the rail, purge handle below it,
   one shared 0.1-10 s scale under both */
.ald-dual {
  flex: 1 1 15rem;
  display: grid;
  grid-template-columns: 1.6rem 5.5ch minmax(0, 1fr) 6.5ch;
  grid-template-rows: 1.9rem 1.5rem 1.1rem;
  column-gap: 0.5rem;
  align-items: center;
  font-size: 0.875rem;
}
.ald-dual-badge {
  grid-column: 1;
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  color: var(--paper);
  font-family: var(--font-mono-qcm);
  font-weight: 700;
}
.ald-dual.gas-a .ald-dual-badge { background: var(--blue); }
.ald-dual.gas-b .ald-dual-badge { background: var(--rose); }
.ald-dual .lab { grid-column: 2; color: var(--ink-3); }
.ald-dual .lab.top, .ald-dual output.top { grid-row: 1; }
.ald-dual .lab.bot, .ald-dual output.bot { grid-row: 2; }
.ald-dual output { grid-column: 4; text-align: right; white-space: nowrap; color: var(--ink); font-variant-numeric: tabular-nums; }
.ald-dual-track {
  grid-column: 3;
  grid-row: 1 / span 3;
  align-self: stretch;
  position: relative;
  margin-inline: 0.5rem;
  touch-action: none;
  cursor: pointer;
}
.ald-dual-track .rail {
  position: absolute;
  left: 0;
  right: 0;
  top: 1.75rem;
  height: 4px;
  background: var(--paper-3);
  border: 1px solid var(--rule);
}
.ald-dual-track .tick {
  position: absolute;
  top: calc(1.75rem - 0.3rem);
  width: 1px;
  height: calc(0.6rem + 4px);
  translate: -50% 0;
  background: var(--ink-3);
}
.ald-dual-track .scale { position: absolute; left: 0; right: 0; top: 3.5rem; font-size: 0.75rem; line-height: 1; color: var(--ink-3); }
.ald-dual-track .scale span { position: absolute; translate: -50% 0; white-space: nowrap; font-variant-numeric: tabular-nums; }
.ald-dual-track .scale span.first { translate: 0 0; }
.ald-dual-track .scale span.last { translate: -100% 0; }
.ald-dual-thumb {
  position: absolute;
  width: 1.25rem;
  height: 1.25rem;
  translate: -50% 0;
  cursor: grab;
  touch-action: none;
}
.ald-dual-thumb:active { cursor: grabbing; }
.ald-dual-thumb:focus-visible { outline: 2px solid var(--blue); outline-offset: 1px; }
.ald-dual-thumb.up { top: calc(1.75rem - 1.25rem - 2px); }
.ald-dual-thumb.dn { top: calc(1.75rem + 6px); }
.ald-dual-thumb::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 0.875rem;
  height: 0.95rem;
  translate: -50% 0;
  background: var(--ink-2);
}
.ald-dual-thumb.up::after { bottom: 0; clip-path: polygon(0 0, 100% 0, 100% 55%, 50% 100%, 0 55%); }
.ald-dual-thumb.dn::after { top: 0; clip-path: polygon(50% 0, 100% 45%, 100% 100%, 0 100%, 0 45%); }
.ald-dual.gas-a .ald-dual-thumb.up::after { background: var(--blue); }
.ald-dual.gas-b .ald-dual-thumb.up::after { background: var(--rose); }
@media (prefers-reduced-motion: reduce) { .ald-mini-pop { transition: none; } }

/* -------------------------------------------------------
   Responsive
   ------------------------------------------------------- */
@media (max-width: 60rem) {
  .qcm-hero { grid-template-columns: minmax(0, 1fr); }
  .qcm-three-up { grid-template-columns: minmax(0, 1fr); }
  .qcm-pipeline { grid-template-columns: minmax(0, 1fr); }
  .qcm-pipeline-steps {
    border-right: none;
    border-bottom: 1px solid var(--rule);
    display: flex;
    overflow-x: auto;
  }
  .qcm-pstep { border-bottom: none; border-right: 1px solid var(--rule); white-space: nowrap; }
  .qcm-two-col { grid-template-columns: minmax(0, 1fr); }
  .qcm-two-col > div:first-child { border-right: none; border-bottom: 1px solid var(--rule); }
  .qcm-end-cta { grid-template-columns: minmax(0, 1fr); }
  .qcm-nav { display: none; }
}

@media (max-width: 54rem) {
  .qcm-author-grid { grid-template-columns: minmax(0, 1fr); }
  .qcm-facts { grid-template-columns: minmax(0, 1fr); }
  .qcm-timeline { grid-template-columns: 4.375rem 1fr; }
  .qcm-layout { grid-template-columns: minmax(0, 1fr); }
  .qcm-toc { position: static; }
  .qcm-req-grid { grid-template-columns: minmax(0, 1fr); }
  .qcm-examples-grid { grid-template-columns: minmax(0, 1fr); }
  .qcm-ex-card { border-right: none; }
  .qcm-cs-grid { grid-template-columns: minmax(0, 1fr); }
  .qcm-cta-banner { flex-direction: column; gap: 0.875rem; }
  .qcm-cta-banner .cta-right { margin-left: 0; }
  .qcm-ds-grid { grid-template-columns: minmax(0, 1fr); }
}

/* Added breakpoints (after the originals so they take precedence) */
@media (max-width: 64rem) {
  .qcm-hero { grid-template-columns: minmax(0, 1fr); }
  h1.qcm-title { max-width: 20ch; }
}

@media (max-width: 48rem) {
  .qcm-pill { display: none; }
  .qcm-sec-head { flex-direction: column; gap: 0.5rem; }
  .qcm-pipeline-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(8.5rem, 1fr));
    overflow: visible;
  }
  .qcm-pstep { white-space: normal; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
  .qcm-pipeline-detail { padding: 1.25rem 1rem; min-height: 0; }
  .qcm-two-col > div { padding: 1.5rem 1.25rem; }
  .qcm-end-cta { padding: 2rem 1.25rem; }
  .qcm-two-col .recipe .row .k { width: auto; flex: 1; }
}

@media (max-width: 30rem) {
  .qcm-topbar-inner { gap: 0.5rem 0.75rem; flex-wrap: wrap; }
  .qcm-platforms { grid-template-columns: minmax(0, 1fr); }
  .qcm-ds-row { flex-wrap: wrap; }
  .qcm-ds-k { width: auto; }
  .qcm-brand { font-size: 0.875rem; }
  .qcm-logo svg { height: 1.5rem; }
}

/* 4-D: on very wide windows, horizontal rules run edge to edge so the margin
   around the column reads as page rather than empty space. */
@media (min-width: 100rem) {
  body { overflow-x: clip; }
  .qcm-section,
  .qcm-inner-header { border-bottom-color: transparent; }
  .qcm-footer { border-top-color: transparent; position: relative; }
  .qcm-section:not(:last-child)::after,
  .qcm-inner-header::after,
  .qcm-footer::before {
    content: "";
    position: absolute;
    left: 50%;
    width: 100vw;
    translate: -50% 0;
    border-top: 1px solid var(--rule);
    pointer-events: none;
  }
  .qcm-section:not(:last-child)::after,
  .qcm-inner-header::after { bottom: -1px; }
  .qcm-footer::before { top: -1px; }
  .qcm-inner-header { position: relative; }
}