.case-study-page {
  background: var(--color-canvas);
  color: var(--color-text);
}

.case-study-header {
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--color-border);
}

.case-study-header .site-brand {
  font-size: 15px;
  letter-spacing: -.02em;
}

.case-study-header .site-brand-mark {
  width: 34px;
  height: 34px;
}

.case-study-header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.case-study-back,
.case-study-link {
  color: var(--color-text-strong);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.case-study-back:hover,
.case-study-link:hover {
  color: var(--color-accent);
}

.case-study-back:focus-visible,
.case-study-link:focus-visible,
.case-study-actions a:focus-visible,
.case-study-siblings a:focus-visible {
  border-radius: 4px;
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.case-study-main {
  width: min(1120px, calc(100% - 64px));
  margin-inline: auto;
}

.case-study-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
  gap: clamp(40px, 7vw, 96px);
  padding: clamp(56px, 8vw, 96px) 0 clamp(48px, 7vw, 80px);
  border-bottom: 1px solid var(--color-border);
}

.case-study-eyebrow,
.case-study-kicker,
.case-study-label,
.case-study-meta dt {
  color: var(--color-accent);
  font: 650 11px/1.4 var(--font-mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.case-study-hero h1 {
  max-width: 760px;
  margin: 14px 0 0;
  font-size: clamp(42px, 7vw, 78px);
  font-weight: 650;
  line-height: .98;
  letter-spacing: -.055em;
}

.case-study-deck {
  max-width: 720px;
  margin: 28px 0 0;
  color: var(--color-text-body);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.55;
}

.case-study-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.case-study-actions a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--color-border-strong);
  border-radius: 8px;
  color: var(--color-text);
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
}

.case-study-actions a:first-child {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-on-accent);
}

.case-study-actions a:hover {
  border-color: var(--color-accent);
}

.case-study-summary {
  align-self: start;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-surface-raised);
}

.case-study-summary h2 {
  margin: 0 0 18px;
  font-size: 16px;
  letter-spacing: -.02em;
}

.case-study-meta {
  display: grid;
  gap: 16px;
  margin: 0;
}

.case-study-meta div {
  display: grid;
  gap: 5px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.case-study-meta div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.case-study-meta dt {
  color: var(--color-text-muted);
}

.case-study-meta dd {
  margin: 0;
  color: var(--color-text-strong);
  font-size: 13px;
  line-height: 1.5;
}

.case-study-evidence {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.case-study-label {
  padding: 6px 9px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface-subtle);
  color: var(--color-text-strong);
  letter-spacing: .035em;
  text-transform: none;
}

.case-study-label.is-missing {
  border-color: var(--color-warning);
  background: var(--color-warning-soft);
  color: var(--color-warning);
}

.case-study-body {
  width: min(760px, 100%);
  margin-inline: auto;
  padding: 18px 0 80px;
}

.case-study-section {
  padding: 54px 0;
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: 80px;
}

.case-study-section:last-child {
  border-bottom: 0;
}

.case-study-section h2 {
  margin: 9px 0 20px;
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1.08;
  letter-spacing: -.04em;
}

.case-study-section h3 {
  margin: 28px 0 10px;
  font-size: 17px;
  letter-spacing: -.02em;
}

.case-study-section p,
.case-study-section li {
  color: var(--color-text-body);
  font-size: 16px;
  line-height: 1.75;
}

.case-study-section p {
  margin: 0 0 16px;
}

.case-study-section ul,
.case-study-section ol {
  margin: 16px 0;
  padding-left: 24px;
}

.case-study-section li + li {
  margin-top: 8px;
}

.case-study-section strong {
  color: var(--color-text-strong);
}

.case-study-section a {
  color: var(--color-accent);
  text-underline-offset: 3px;
}

.case-study-section pre {
  max-width: 100%;
  margin: 22px 0;
  overflow-x: auto;
  padding: 18px 20px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface-raised);
  color: var(--color-text-strong);
  font: 500 13px/1.7 var(--font-mono);
}

.case-study-callout {
  margin: 24px 0;
  padding: 18px 20px;
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-soft);
}

.case-study-callout p:last-child {
  margin-bottom: 0;
}

.case-study-siblings {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 32px 0 72px;
}

.case-study-siblings a {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface-raised);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
}

.case-study-siblings a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

@media (max-width: 760px) {
  .case-study-main {
    width: min(100% - 32px, 680px);
  }

  .case-study-header-actions {
    gap: 10px;
  }

  .case-study-back {
    font-size: 12px;
  }

  .case-study-hero {
    grid-template-columns: 1fr;
    gap: 34px;
    padding-top: 48px;
  }

  .case-study-summary {
    padding: 20px;
  }

  .case-study-section {
    padding: 44px 0;
  }

  .case-study-section p,
  .case-study-section li {
    font-size: 15px;
  }

  .case-study-siblings {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 420px) {
  .case-study-header .site-brand span:last-child {
    display: none;
  }

  .case-study-actions a {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}