/* ==========================================================================
   CASE — the three project pages.

   A case study is a document, so it is laid out like one: a masthead, a
   specification block, one measure of prose, and figures parked in the
   margin. Same tokens, same background, quieter.
   ========================================================================== */

.page-case .shell { padding-bottom: 0; }

/* --------------------------------------------------------------- masthead */

.case-hero {
  padding-top: calc(var(--head-h) + clamp(3rem, 9vh, 7rem));
  padding-bottom: clamp(2.5rem, 6vh, 4.5rem);
}

.case-crumb {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: var(--t-label);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-60);
  margin-bottom: clamp(2rem, 5vw, 3.25rem);
  transition: color 0.3s var(--ease), transform 0.35s var(--ease);
}
.case-crumb:hover { color: var(--paper); transform: translateX(-3px); }

.case-kicker {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-family: var(--mono);
  font-size: var(--t-label);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-74);
  margin-bottom: clamp(1.25rem, 2.5vw, 1.75rem);
}
.case-kicker b { color: var(--signal); font-weight: 500; font-variant-numeric: tabular-nums; }
.case-kicker i { flex: 1; max-width: 6rem; height: 1px; background: var(--line); }

.case-title {
  font-size: var(--t-mega);
  font-stretch: 100%;
  letter-spacing: -0.045em;
  line-height: 0.86;
  margin-bottom: clamp(1.25rem, 2.5vw, 1.75rem);
}

.case-sub {
  font-size: var(--t-md);
  line-height: 1.34;
  color: var(--paper-88);
  max-width: 34ch;
  font-family: var(--display);
  font-weight: 450;
  font-stretch: 100%;
  letter-spacing: -0.012em;
  margin-bottom: clamp(2rem, 4vw, 3rem);
  text-wrap: pretty;
}

/* ------------------------------------------------------------ spec block */

.case-meta {
  padding-block: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.case-meta__grid {
  display: grid;
  gap: 1.5rem 2rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
}

.case-meta__grid dt { margin-bottom: 0.4rem; }
.case-meta__grid dd { color: var(--paper-88); font-size: 1.0625rem; line-height: 1.5; }

/* ------------------------------------------------------------------ body */

.case-body { padding-block: clamp(3rem, 8vh, 6rem); }

.case-body__inner {
  display: grid;
  gap: clamp(2.5rem, 5vw, 4.5rem);
}

@media (min-width: 1000px) {
  .case-body__inner { grid-template-columns: minmax(0, 7fr) minmax(0, 3fr); }
}

.case-prose h2 {
  font-family: var(--display);
  font-weight: 650;
  font-stretch: 100%;
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  line-height: 1.08;
  letter-spacing: -0.024em;
  color: var(--paper);
  margin-top: clamp(2.75rem, 5vw, 4rem);
  margin-bottom: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-soft);
}
.case-prose h2:first-child { margin-top: 0; border-top: 0; padding-top: 0; }

.case-prose p {
  color: var(--paper-74);
  max-width: 68ch;
  text-wrap: pretty;
}
.case-prose p + p { margin-top: 1.15em; }
.case-prose > p:first-of-type { color: var(--paper-88); }

.case-pull { margin-block: clamp(2.25rem, 4vw, 3.25rem); max-width: 30ch; }

/* Specification list: a definition table that stays readable on a phone. */
.specs {
  margin-block: clamp(1.75rem, 3vw, 2.5rem);
  border-top: 1px solid var(--line-soft);
}

.specs li {
  display: grid;
  gap: 0.3rem;
  padding-block: 0.95rem;
  border-bottom: 1px solid var(--line-soft);
}

@media (min-width: 700px) {
  .specs li { grid-template-columns: 9rem minmax(0, 1fr); gap: 1.5rem; align-items: baseline; }
}

.specs b {
  font-family: var(--mono);
  font-size: var(--t-label);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--signal);
}
.specs span { color: var(--paper-74); font-size: 1.0625rem; line-height: 1.55; }

/* ------------------------------------------------------------------ aside */

.case-aside {
  align-self: start;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

@media (min-width: 640px) and (max-width: 999px) {
  .case-aside { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1000px) {
  .case-aside { position: sticky; top: calc(var(--head-h) + 2rem); }
}

.case-figure {
  background: rgba(8, 8, 11, 0.55);
  padding: 1.25rem;
  transition: background-color 0.4s var(--ease);
}
.case-figure:hover { background: rgba(255, 255, 255, 0.035); }

.case-figure dt { margin-bottom: 0.5rem; }

.case-figure dd {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

/* The number lives in its own span so the caption underneath survives the
   counter rewriting textContent. */
.case-figure dd > span {
  font-family: var(--display);
  font-weight: 650;
  font-stretch: 100%;
  font-size: clamp(1.85rem, 3vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.028em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.case-figure dd small {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.03em;
  color: var(--paper-60);
  line-height: 1.4;
}

/* ------------------------------------------------------------------ pager */

.case-pager {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line);
  margin-top: clamp(3rem, 7vh, 5rem);
}

@media (min-width: 700px) { .case-pager { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.case-pager__link {
  background: rgba(8, 8, 11, 0.55);
  padding: clamp(1.75rem, 3.5vw, 2.75rem);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  transition: background-color 0.4s var(--ease);
}
.case-pager__link:hover { background: rgba(255, 255, 255, 0.04); }
.case-pager__link--next { text-align: right; align-items: flex-end; }

.case-pager__label { color: var(--paper-60); transition: color 0.3s var(--ease); }
.case-pager__link:hover .case-pager__label { color: var(--signal); }

.case-pager__title {
  font-family: var(--display);
  font-weight: 650;
  font-stretch: 100%;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1;
  letter-spacing: -0.028em;
  color: var(--paper);
  transition: transform 0.45s var(--ease);
}
.case-pager__link:hover .case-pager__title { transform: translateX(4px); }
.case-pager__link--next:hover .case-pager__title { transform: translateX(-4px); }

/* Case pages carry no index rail, so they take back the space the rail
   would have occupied and use the full measure. */
@media (min-width: 1200px) {
  .page-case .wrap,
  .page-case .foot__inner { padding-left: 0; }
}

/* ------------------------------------------------------------------- 404 */

.nf {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.5rem;
  padding-block: calc(var(--head-h) + 3rem) 4rem;
}

.nf__code {
  font-family: var(--display);
  font-weight: 700;
  font-stretch: 100%;
  font-size: var(--t-mega);
  line-height: 0.84;
  letter-spacing: -0.05em;
  color: var(--paper);
}

.nf__links { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1rem; }