/* =========================================================
   CASE-STUDY — shared graphic primitives for /etc entries
   with `type: case-study`. Layered on top of foundation.css,
   feed.css, and work.css. Anything article-specific (a custom
   palette, an interactive widget) belongs in extra_css; the
   reusable kit lives here.
   ========================================================= */

/* --- figures ------------------------------------------------ */
/* Hand-built figures that live in the reading flow. Cartoon-card
   chrome around an inline SVG, pictogram, or stat tile grid.
   Never their own scrollbars. */
.figure {
  padding: var(--s-3);
  position: relative;
  margin: 0;
}
.figure-title {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  letter-spacing: -0.01em;
  margin: 0 0 0.875rem;
  color: var(--ink);
  line-height: 1.2;
}
.figure-note {
  margin: 14px 0 0;
  color: var(--ink-mute);
  font-size: 13px;
  line-height: 1.6;
}
.figure-note code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--ink);
  color: var(--cream);
  padding: 1px 5px;
}

/* --- sweep -------------------------------------------------- */
/* Wide rectangular plot. Used for time-collapse curves, fleet
   growth, distribution bars, before/after deltas. */
.sweep {
  --tile-shadow: var(--shadow-sm);
  padding: var(--s-3) var(--s-3) var(--s-2);
  margin: 0;
}
.sweep-title {
  font-family: var(--font-display);
  font-size: 1.25rem; /* 20px → 27.5px @ billboard */
  letter-spacing: -0.01em;
  margin: 0 0 0.625rem;
  color: var(--ink);
}
.sweep-svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 260px;
}
.sweep-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
}
.sweep-legend .swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  vertical-align: -2px;
  margin-right: 4px;
  border: 1px solid var(--ink);
}

/* --- aphorism ----------------------------------------------- */
/* Single-sentence pull-out used at most twice per study. */
.aphorism {
  --tile-bg: var(--cream-deep);
  --tile-shadow: var(--shadow-sm);
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  line-height: 1.3;
  letter-spacing: -0.01em;
  text-align: center;
  padding: var(--s-4);
  margin: 0;
}
.aphorism strong {
  font-weight: inherit;
  color: var(--lavender);
}
.aphorism u {
  text-decoration-thickness: 3px;
  text-underline-offset: 6px;
}
.aphorism.aphorism-red strong {
  color: var(--brick);
}
.aphorism.aphorism-sage strong {
  color: var(--sage);
}

/* --- math sidenote ----------------------------------------- */
/* Plain English in the body, formula here. Opens with
   "Formally put, …" — no all-caps "for the curious" labels. */
.math-aside {
  font-size: 0.92em;
  color: var(--ink-mute);
  border-left: 2px solid var(--ink-mute);
  padding: 4px 0 4px 14px;
  margin: 8px 0 16px;
  font-style: normal;
}

/* --- pictogram tiles --------------------------------------- */
.pictogram-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-3);
}
.pictogram-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-2);
}
@media (max-width: 740px) {
  .pictogram-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 460px) {
  .pictogram-pair,
  .pictogram-grid-3 {
    grid-template-columns: 1fr;
  }
}
.pictogram-card {
  --tile-shadow: var(--shadow-sm);
  padding: 16px 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pictogram-card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: -0.01em;
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}
.pictogram-card-title .flag,
.pictogram-card-title .glyph {
  font-size: 18px;
  line-height: 1;
  position: relative;
  top: 1px;
}
.pictogram-card-meta {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-mute);
  margin: 0;
}
.pictogram-readout {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-display);
  margin: 0;
  flex-wrap: wrap;
}
.pictogram-readout .num {
  /* 24px clears the WCAG large-text 3:1 bar so --sage (.num.good) on cream
     passes AA; do not darken the --sage token (it is a fill elsewhere). */
  font-size: 1.5rem;
  letter-spacing: -0.01em;
}
.pictogram-readout .num.good {
  color: var(--sage);
}
.pictogram-readout .num.bad {
  color: var(--brick);
}
.pictogram-readout .num.mute {
  color: var(--ink-mute);
}
.pictogram-readout .label {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--ink-mute);
}

/* --- unit dots --------------------------------------------- */
/* Generic dictogram-of-N grid. Each .unit-pict represents a
   countable item (a device, a form, a request). Tag with a color
   class to encode category. */
.unit-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 3px;
  margin: 2px 0;
}
.unit-grid.cols-12 {
  grid-template-columns: repeat(12, 1fr);
}
.unit-grid.cols-15 {
  grid-template-columns: repeat(15, 1fr);
}
.unit-grid.cols-20 {
  grid-template-columns: repeat(20, 1fr);
}
.unit-pict {
  aspect-ratio: 1 / 1;
  border-radius: 2px;
  border: 1.2px solid var(--ink);
  position: relative;
  box-shadow:
    inset 0 -1px 0 rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);
}
.unit-pict.round {
  border-radius: 50%;
}
.unit-pict.brick {
  background: var(--brick);
}
.unit-pict.lavender {
  background: var(--lavender);
}
.unit-pict.sage {
  background: var(--sage);
}
.unit-pict.cream {
  background: var(--cream);
}
.unit-pict.ink {
  background: var(--ink);
}
.unit-pict.faded {
  opacity: 0.32;
  border-color: var(--ink-mute);
}

/* --- inline tokens ----------------------------------------- */
/* Tiny inline pictogram for prose mentions. Use as punctuation,
   not refrain — once or twice per study at most. */
.inline-token {
  display: inline-block;
  width: 0.95em;
  height: 0.95em;
  border-radius: 2px;
  border: 1.5px solid var(--ink);
  vertical-align: -0.12em;
  margin: 0 0.05em;
  box-shadow:
    inset 0 -1px 0 rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.32);
}
.inline-token.round {
  border-radius: 50%;
}
.inline-token.brick {
  background: var(--brick);
}
.inline-token.lavender {
  background: var(--lavender);
}
.inline-token.sage {
  background: var(--sage);
}
.inline-token.ink {
  background: var(--ink);
}

/* --- pipeline cards ---------------------------------------- */
/* For the "system A → system B" schematics that case studies
   like to draw. Pure CSS, no SVG required, scales down to
   mobile by stacking. */
.pipeline {
  display: flex;
  align-items: stretch;
  gap: 0;
  flex-wrap: wrap;
}
.pipeline-step {
  flex: 1 1 140px;
  background: var(--cream);
  border: 2px solid var(--ink);
  padding: 12px 14px;
  position: relative;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.4;
  min-width: 0;
}
.pipeline-step + .pipeline-step {
  margin-left: -2px;
}
.pipeline-step .stage {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  display: block;
  margin-bottom: 4px;
}
.pipeline-step strong {
  display: block;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: -0.01em;
}
.pipeline-step.brick {
  background: color-mix(in srgb, var(--brick) 12%, var(--cream));
}
.pipeline-step.lavender {
  background: color-mix(in srgb, var(--lavender) 12%, var(--cream));
}
.pipeline-step.sage {
  background: color-mix(in srgb, var(--sage) 14%, var(--cream));
}
@media (max-width: 640px) {
  .pipeline-step {
    flex-basis: 100%;
  }
  .pipeline-step + .pipeline-step {
    margin-left: 0;
    margin-top: -2px;
  }
}

/* --- breathing room ---------------------------------------- */
/* Default .prose rhythm is too tight against the heavy borders
   + shadows of these cards. */
.prose > .figure + *,
.prose > .pictogram-pair + *,
.prose > .pictogram-grid-3 + *,
.prose > .sweep + *,
.prose > .aphorism + *,
.prose > .pipeline + * {
  margin-top: 2.4em;
}
.prose > * + .figure,
.prose > * + .pictogram-pair,
.prose > * + .pictogram-grid-3,
.prose > * + .sweep,
.prose > * + .aphorism,
.prose > * + .pipeline {
  margin-top: 2.4em;
}
.prose > * + .math-aside,
.prose > .math-aside + * {
  margin-top: 2em;
}

/* --- footnote claim links ---------------------------------- */
/* Wrap a claim + its <sup> in <a class="fn-claim"> to give the
   reader a wider hover target and a visual cue that the sentence
   is annotated. */
.fn-claim {
  color: inherit;
  text-decoration: none;
}
.fn-claim .footnote-ref {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--lavender);
  padding: 1px 5px;
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--lavender) 12%, transparent);
  transition:
    background var(--dur-press) var(--ease-press),
    color var(--dur-press) var(--ease-press);
}
.fn-claim:hover .footnote-ref {
  background: var(--lavender);
  color: var(--offwhite);
}

/* --- footnote breathing room ------------------------------- */
.prose > .footnotes {
  margin-top: 6em;
}

/* ---------- Wrist (≤280px) — sweep charts shrink so a single SVG
   doesn't fill the entire viewport. */
@media (max-width: 280px) {
  .sweep-svg {
    max-height: 160px;
  }
}