/* ==========================================================================
   Case studies: exhibits (SVG diagrams), case library tiles, case pages
   ========================================================================== */

/* --- Exhibit visual language (classes emitted by tools/exhibits.py) ------- */
.exhibit {
  margin: 0;
}

.exhibit__frame {
  padding: clamp(1rem, 0.4rem + 2vw, 2.25rem);
  background: var(--plate);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
}

.exhibit__svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.exhibit figcaption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.8rem;
  margin-top: 0.9rem;
  font-size: 0.875rem;
  color: var(--fg-muted);
}

.exhibit__tag {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.ex-text {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
  fill: var(--fg);
}

.ex-label {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  fill: var(--fg-muted);
}

.ex-caption {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  fill: var(--fg-muted);
}

.ex-step {
  font-family: var(--font-display);
  font-size: 19px;
  font-variant-numeric: lining-nums;
  fill: var(--gold);
}

.ex-value {
  font-family: var(--font-display);
  font-size: 42px;
  font-weight: var(--display-weight);
  font-variant-numeric: lining-nums;
  fill: var(--fg);
}

.ex-box,
.ex-node {
  fill: var(--bg);
  stroke: var(--line-strong);
  stroke-width: 1.2;
}

.ex-box--key,
.ex-node--key {
  fill: var(--bg);
  stroke: var(--gold-line);
  stroke-width: 1.8;
}

.ex-rule,
.ex-leader,
.ex-tick {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1.2;
}

.ex-leader {
  stroke-width: 1;
}

.ex-dash {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1;
  stroke-dasharray: 3 4;
}

.ex-arrow,
.ex-gold-rule {
  fill: none;
  stroke: var(--gold-line);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ex-ring {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1.2;
}

.ex-ring--core {
  fill: var(--bg);
  stroke: var(--gold-line);
  stroke-width: 1.6;
}

.ex-dot {
  fill: var(--gold-line);
}

.ex-dot--muted {
  fill: var(--graphic);
}

.ex-gate,
.ex-milestone {
  fill: var(--bg);
  stroke: var(--gold-line);
  stroke-width: 1.6;
}

.ex-lane {
  fill: var(--plate);
  fill: color-mix(in srgb, var(--graphic) 9%, var(--bg));
  stroke: var(--line);
  stroke-width: 1;
}

.ex-band {
  fill: var(--plate);
  fill: color-mix(in srgb, var(--graphic) 16%, transparent);
  stroke: var(--graphic);
  stroke-width: 1;
}

.ex-flow {
  fill: none;
  stroke: var(--graphic);
  stroke-width: 1.2;
  opacity: 0.85;
}

.ex-venn {
  fill: var(--plate);
  fill: color-mix(in srgb, var(--graphic) 14%, transparent);
  stroke: var(--graphic);
  stroke-width: 1.2;
}

/* --- Case library (work page) --------------------------------------------- */
.case-grid {
  display: grid;
  gap: var(--col-gap);
  margin-top: clamp(2rem, 1.5rem + 2vw, 3rem);
}

.case-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  isolation: isolate;
  scroll-margin-top: calc(var(--header-h) + 1rem);
  transition: border-color var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}

.case-tile[hidden] {
  display: none;
}

.case-tile:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.case-tile__visual {
  padding: clamp(1rem, 0.6rem + 1.5vw, 1.75rem);
  background: var(--plate);
  border-bottom: 1px solid var(--line);
}

.case-tile__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.8rem;
  padding: clamp(1.4rem, 1rem + 1.2vw, 2rem);
}

.case-tile__meta,
.case-card__meta {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.case-tile__title {
  font-size: calc(var(--step-3) * var(--display-scale));
  line-height: 1.1;
  max-width: 20em;
}

.case-tile__title a,
.case-card__title a {
  text-decoration: none;
}

.case-tile__title a::after,
.case-card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
}

.case-tile__text {
  color: var(--fg-muted);
  max-width: 36em;
}

.case-tile__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.case-tile__facts li {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-btn);
  font-size: 0.8125rem;
  font-weight: 600;
}

.case-tile__more,
.case-card__more {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: auto;
  padding-top: 0.4rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.case-tile:hover .icon-arrow,
.case-card:hover .icon-arrow {
  transform: translateX(4px);
}

@media (min-width: 48em) {
  .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 64em) {
  .case-tile--feature {
    grid-column: 1 / -1;
    flex-direction: row;
  }

  .case-tile--feature .case-tile__visual {
    flex: 0 0 58%;
    display: grid;
    align-items: center;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .case-tile--feature .case-tile__body {
    justify-content: center;
    padding: clamp(2rem, 1rem + 2vw, 3.25rem);
  }

  .case-tile--feature .case-tile__title {
    font-size: calc(var(--step-4) * var(--display-scale));
  }
}

/* --- Case page -------------------------------------------------------------- */
.case-head {
  padding-top: clamp(2.25rem, 1rem + 4.5vw, 5.5rem);
  padding-bottom: clamp(2rem, 1.25rem + 2.5vw, 3.5rem);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  font-size: 0.8125rem;
  color: var(--fg-muted);
}

.crumbs li + li::before {
  content: "";
  display: inline-block;
  width: 1px;
  height: 0.8em;
  margin-right: 0.6rem;
  vertical-align: -0.05em;
  background: var(--line-strong);
  transform: rotate(20deg);
}

.crumbs a {
  color: var(--fg-muted);
  text-decoration: none;
}

.crumbs a:hover {
  color: var(--fg);
  text-decoration: underline;
}

.case-head__title {
  max-width: 15em;
  margin: 1.4rem 0 1.5rem;
}

.case-head__lede {
  max-width: 34em;
}

.case-visual__grid {
  display: grid;
  gap: clamp(1.5rem, 1rem + 2vw, 3rem);
}

/* Grid items default to min-width: auto; let the exhibit scroll instead of widening the page. */
.case-visual__grid > * {
  min-width: 0;
}

.glance {
  align-self: start;
  border-top: 1px solid var(--line-strong);
}

.glance__title {
  padding-block: 1.1rem 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.glance dl > div {
  display: grid;
  gap: 0.25rem;
  padding-block: 0.95rem;
  border-bottom: 1px solid var(--line);
}

.glance dt {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.glance dd {
  font-family: var(--font-display);
  font-size: calc(1.25rem * var(--display-scale));
  line-height: 1.25;
}

@media (min-width: 64em) {
  .case-visual__grid { grid-template-columns: minmax(0, 8.5fr) minmax(0, 3.5fr); }
}

.case-figures {
  padding-top: clamp(2.5rem, 2rem + 2vw, 4rem);
}

.case-block {
  display: grid;
  gap: 1rem 2rem;
  padding-block: clamp(1.75rem, 1.25rem + 1.5vw, 2.75rem);
  border-top: 1px solid var(--line);
}

.case-block:first-child {
  border-top-color: var(--line-strong);
}

.case-block__h {
  font-family: var(--font-display);
  font-size: calc(var(--step-3) * var(--display-scale));
  font-weight: var(--display-weight);
  letter-spacing: var(--display-tracking);
  line-height: 1.1;
}

.case-block__body > p {
  font-size: var(--step-1);
  line-height: 1.65;
  color: var(--fg-muted);
  max-width: 38em;
}

.case-block__body .checklist li {
  font-size: 1.0625rem;
}

@media (min-width: 64em) {
  .case-block { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); column-gap: var(--col-gap); }
}

.case-note {
  margin-top: 1.5rem;
  font-size: 0.8125rem;
  color: var(--fg-muted);
}

.case-pager {
  display: grid;
  gap: 1.25rem;
  margin-top: clamp(2.5rem, 2rem + 2vw, 4rem);
  padding-top: 2rem;
  border-top: 1px solid var(--line-strong);
}

.case-pager__link {
  display: grid;
  gap: 0.35rem;
  text-decoration: none;
}

.case-pager__dir {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.case-pager__title {
  font-family: var(--font-display);
  font-size: calc(1.3rem * var(--display-scale));
  line-height: 1.2;
  transition: color var(--dur-fast) var(--ease-out);
}

.case-pager__link:hover .case-pager__title {
  color: var(--accent);
}

.case-pager__all {
  align-self: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fg-muted);
}

@media (min-width: 64em) {
  .case-pager {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: start;
    column-gap: 3rem;
  }

  .case-pager__link--next {
    text-align: right;
  }
}

.exhibit__hint {
  display: none;
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--fg-muted);
}

@media (max-width: 47.99em) {
  .exhibit__frame {
    margin-inline: calc(-1 * var(--gutter));
    padding: 0.75rem var(--gutter);
    overflow-x: auto;
    overscroll-behavior-x: contain;
    border-inline: 0;
    border-radius: 0;
  }

  .exhibit__frame .exhibit__svg {
    min-width: 32rem;
  }

  .exhibit__hint {
    display: inline;
  }
}

/* Stretched-link cards: show the focus ring on the whole card. */
@supports selector(:has(*)) {
  .case-tile:has(.case-tile__title a:focus-visible),
  .case-card:has(.case-card__title a:focus-visible) {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
  }

  .case-tile__title a:focus-visible,
  .case-card__title a:focus-visible {
    outline: none;
  }
}

/* --- Exhibit forms: pillars (the annotated matrix lives in matrix.css) -------- */
.ex-lead {
  fill: var(--gold-line);
}

/* --- Client relationship map (work page) ------------------------------------- */
.relationship__intro {
  margin-bottom: clamp(2rem, 1.5rem + 2vw, 3rem);
}

.rel-map__client {
  position: relative;
  display: grid;
  gap: 0.35rem;
  max-width: 30rem;
  margin-inline: auto;
  padding: 1.5rem 1.75rem;
  background: var(--bg);
  border: 1px solid var(--gold-line);
  border-radius: var(--radius-m);
  text-align: center;
}

.rel-map__label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.rel-map__name {
  font-family: var(--font-display);
  font-size: calc(var(--step-3) * var(--display-scale));
  font-weight: var(--display-weight);
  letter-spacing: var(--display-tracking);
  line-height: 1.1;
}

.rel-map__meta {
  font-size: 0.875rem;
  color: var(--fg-muted);
}

.rel-map__cols {
  position: relative;
  display: grid;
  gap: 2rem var(--col-gap);
  margin-top: 3rem;
}

.rel-col {
  position: relative;
  padding-top: 1.1rem;
  border-top: 2px solid var(--gold-line);
}

.rel-col__h {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.rel-col__count {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: var(--display-weight);
  letter-spacing: 0;
  line-height: 1;
  color: var(--fg);
}

.rel-col__list {
  border-top: 1px solid var(--line);
}

.rel-item {
  display: grid;
  gap: 0.25rem;
  padding-block: 0.9rem;
  border-bottom: 1px solid var(--line);
}

.rel-item__text {
  font-family: var(--font-display);
  font-size: calc(1.2rem * var(--display-scale));
  line-height: 1.25;
}

.rel-item__text a {
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}

.rel-item__text a:hover {
  color: var(--accent);
}

.rel-item__text .icon-arrow {
  display: inline-block;
  vertical-align: -0.12em;
  width: 0.8em;
  height: 0.8em;
}

.rel-item__fact {
  font-size: 0.8125rem;
  color: var(--gold);
}

@media (min-width: 48em) {
  .rel-map__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 64em) {
  .rel-map__cols { grid-template-columns: repeat(4, minmax(0, 1fr)); }

  /* Connectors: client to a bus line, bus to each column. */
  .rel-map__client::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 100%;
    height: 1.5rem;
    border-left: 1px solid var(--line-strong);
  }

  .rel-map__cols::before {
    content: "";
    position: absolute;
    top: -1.5rem;
    left: calc((100% - 3 * var(--col-gap)) / 8);
    right: calc((100% - 3 * var(--col-gap)) / 8);
    border-top: 1px solid var(--line-strong);
  }

  .rel-col::before {
    content: "";
    position: absolute;
    left: 50%;
    top: calc(-1.5rem - 2px);
    height: 1.5rem;
    border-left: 1px solid var(--line-strong);
  }
}

.case-head__rel {
  margin-top: 1.25rem;
  font-size: 0.9375rem;
}

.case-head__rel a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.case-head__rel .icon-arrow {
  display: inline-block;
  vertical-align: -0.15em;
}