/* Shared case study layout — tokens in css/tokens.css */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
body {
  font: var(--text-base)/var(--leading-body) var(--font-body);
  color: var(--fg);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  --max: 760px;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

.case-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px;
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.back-link {
  font: 500 14px/1 var(--font-display);
  display: inline-flex; align-items: center; gap: 6px;
  min-height: 44px; padding: 0 4px;
}
.back-link:hover { color: var(--accent); }
.case-nav-label {
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.case-hero {
  padding: 40px 20px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.case-hero-inner { max-width: var(--wide); margin: 0 auto; }
/* .case-kicker defined in site.css (shared with page-kicker, story-kicker) */
.case-hero h1 {
  font: 700 clamp(32px, 7vw, 52px)/1.08 var(--font-display);
  letter-spacing: -0.03em;
  max-width: 18ch;
  margin-bottom: 20px;
}
.case-meta {
  display: flex; flex-wrap: wrap; gap: 24px;
}
.case-meta dt {
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.case-meta dd { font: 500 15px/1.3 var(--font-display); }

.section-nav {
  position: sticky; top: var(--nav-h); z-index: 40;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
}
.section-nav::-webkit-scrollbar { display: none; }
.section-nav-inner {
  max-width: var(--wide); margin: 0 auto;
  display: flex; gap: 4px; padding: 12px 20px;
}
.section-nav a {
  flex-shrink: 0;
  font: 500 13px/1 var(--font-mono);
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  min-height: 44px;
  display: inline-flex; align-items: center;
}
.section-nav a:hover { color: var(--fg); background: var(--fill-subtle); }
.section-nav a.active { background: var(--fg); color: var(--surface); }

.case-content { padding: 40px 20px 64px; }
.case-content-inner { max-width: var(--max); margin: 0 auto; }
.case-block { margin-bottom: 48px; scroll-margin-top: calc(var(--nav-h) + 56px); }
.case-block h2 {
  font: 700 clamp(22px, 4vw, 28px)/1.15 var(--font-display);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--fg);
}

/* Sub-headers — content hierarchy only; never accent (reads as links / nav active) */
.case-subhead,
.case-block h3,
.scope-item h3 {
  font: 600 15px/1.3 var(--font-display);
  letter-spacing: -0.01em;
  color: var(--fg);
  margin-bottom: 6px;
}
.case-block p {
  color: var(--muted);
  margin-bottom: 14px;
  font-size: 16px;
}
.case-block p:last-child { margin-bottom: 0; }
.case-block ul {
  margin: 16px 0 0 1.2em;
  color: var(--muted);
}
.case-block li { margin-bottom: 8px; }

.media-frame {
  margin: 32px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}
.media-placeholder {
  aspect-ratio: 16 / 10;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--border-soft), var(--surface));
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 24px;
  text-align: center;
}
.media-placeholder--health { background: linear-gradient(135deg, #e8edf5, #d8e2f0); }
.media-placeholder--edu { background: linear-gradient(135deg, #e8f0e8, #d4e8d4); }
.media-placeholder--geo { background: linear-gradient(135deg, #e8e4f5, #d4cce8); }
.media-placeholder--ai {
  background: linear-gradient(135deg, #eceef4, #dde2ec);
}
.media-caption {
  padding: 12px 16px;
  font: 500 12px/1.4 var(--font-mono);
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.outcome-list {
  list-style: none; margin: 20px 0 0; padding: 0;
  display: grid; gap: 12px;
}
.outcome-list li {
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: 15px;
  color: var(--fg);
  margin: 0;
}
.outcome-list strong {
  display: block;
  font: 600 15px/1.3 var(--font-display);
  letter-spacing: -0.01em;
  color: var(--fg);
  margin-bottom: 4px;
}

.leadership-scope {
  display: grid;
  gap: 12px;
  margin: 20px 0 24px;
}
.scope-item {
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.scope-item p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.55;
  margin: 0;
}
@media (min-width: 640px) {
  .leadership-scope { grid-template-columns: 1fr 1fr; }
}

.case-footer {
  border-top: 1px solid var(--border);
  padding: 32px 20px 48px;
  background: var(--surface);
}
.case-footer-inner {
  max-width: var(--wide); margin: 0 auto;
  display: grid; gap: 16px;
}
.case-footer a {
  display: flex; flex-direction: column; gap: 4px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 44px;
  transition: border-color 0.15s;
}
.case-footer a:hover { border-color: var(--accent); }
.case-footer .label {
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.case-footer .title {
  font: 600 17px/1.25 var(--font-display);
}
.case-footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (min-width: 768px) {
  .case-hero { padding: 56px 32px 40px; }
  .case-content { padding: 56px 32px 80px; }
  .case-header { padding: 0 32px; }
}