/* Case Studies overview. Route: /case-studies/ — 网站规划.md §6.8
   (lines 253–259) and §9 (lines 483–525).
   Only page-level rules live here: shared classes stay in style.css and the
   design tokens in assets/css/tokens.css. Nothing here redefines a shared
   class, and every block folds to one column at 375px (§19, lines 943–960). */

/* ---------- Anonymous-by-default disclosure ---------- */

.case-disclosure-block { padding: 0 0 var(--section); }

.case-disclosure {
  display: grid;
  gap: 1.5rem;
  padding: 1.5rem;
  border: 1px solid var(--stone);
  border-left: 3px solid var(--brass);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
}

.case-disclosure__intro { min-width: 0; }

.case-disclosure__title {
  margin: 0;
  font-size: 1.3rem;
  line-height: 1.3;
}

.case-disclosure__body { min-width: 0; }
.case-disclosure__body .note + .note { margin-top: 1rem; }

.case-disclosure__list {
  margin: 1.25rem 0 0;
  font-size: var(--fs-small);
  color: var(--graphite);
}

.case-disclosure__list strong {
  font-weight: 700;
  color: var(--ink);
}

@media (min-width: 900px) {
  .case-disclosure {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 3rem;
    padding: 2.5rem;
  }
}

/* ---------- Count and level links ---------- */

.case-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.25rem 2.5rem;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--stone);
}

.case-toolbar__count { margin: 0; }

.case-level-filter { min-width: 0; }

.case-level-filter__label {
  display: block;
  margin-bottom: 0.6rem;
  font-family: var(--font-display);
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--graphite);
}

.case-level-filter__list { margin: 0; }

/* A level link is a tag: same shape as the vocabulary tags, but a link. */
.case-level-filter__link { text-decoration: none; }
.case-level-filter__link:hover { border-color: var(--ink); color: var(--ink); }
.case-level-filter__link[aria-current="true"] { font-weight: 700; }

@media (max-width: 659px) {
  .case-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- Records ---------- */

.case-studies-grid {
  gap: 3rem 2rem;
  align-items: start;
}

.case-card { height: 100%; }
.case-card .media { width: 100%; }

/* A record without a photograph is a text card: no empty image slot, a rule
   instead, so the card still reads as one deliberate block (§18, lines
   926–939, allows no substitute imagery). */
.case-card--text {
  padding-top: 1.25rem;
  border-top: 2px solid var(--brass);
}

.case-card__relations { overflow-wrap: break-word; }
.case-card__relations a { text-decoration-color: var(--stone); }
.case-card__relations a:hover { text-decoration-color: currentColor; }

/* Pagination: style.css carries none, so the page numbers are styled here,
   around the page-numbers markup paginate_links() returns. */
.case-studies-pagination { margin-top: 3.5rem; }

.case-studies-pagination .page-numbers {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.case-studies-pagination .page-numbers a,
.case-studies-pagination .page-numbers span.page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.6rem;
  padding: 0.6em 0.75em;
  border: 1px solid var(--stone);
  border-radius: var(--radius-sm);
  background: var(--white);
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: 700;
  text-decoration: none;
  color: var(--ink);
}

.case-studies-pagination .page-numbers a:hover { border-color: var(--ink); }

.case-studies-pagination .page-numbers .current {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--white);
}

.case-studies-pagination .page-numbers .dots {
  border-color: transparent;
  background: transparent;
  color: var(--graphite);
}

/* ---------- How a record is written ---------- */

.case-steps { margin-bottom: 4rem; }

.case-results {
  max-width: var(--read);
  padding-top: 2.25rem;
  border-top: 1px solid var(--stone);
}

.case-results__title {
  margin: 0 0 0.6em;
  font-size: 1.15rem;
}

.case-results__lead { color: var(--graphite); }
.case-results__list { margin: 1.75rem 0 0; }

.case-result__label {
  margin: 0 0 0.3em;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: var(--track-tight);
}

.case-result__text {
  margin: 0;
  font-size: var(--fs-small);
  color: var(--graphite);
}

/* ---------- What a record does not claim ---------- */

.case-limits__body {
  align-items: start;
  gap: 3rem;
}

.case-limits__copy h3 { font-size: 1.15rem; }
.case-limits__copy p { color: var(--graphite); }

.case-levels { min-width: 0; }
.case-levels__lead { color: var(--graphite); }
.case-levels__list { margin: 1.5rem 0 0; }

.case-levels__note {
  margin: 1.5rem 0 0;
  font-size: var(--fs-small);
  color: var(--graphite);
}

@media (max-width: 659px) {
  .case-disclosure { padding: 1.35rem; }
  .case-studies-pagination .page-numbers { gap: 0.35rem; }

  .case-studies-pagination .page-numbers a,
  .case-studies-pagination .page-numbers span.page-numbers {
    min-width: 2.4rem;
    padding: 0.5em 0.6em;
  }
}