/* ============================================================
   /case-studies/* — index + per-customer detail pages
   Design system pulls from tokens.css; visual signature mirrors
   /ai-data-integration/, /composer/ landing pages.
   ============================================================ */

/* ---- Index page ----------------------------------------------------- */

.cs-hero {
  padding: 80px 24px 48px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.cs-hero__inner {
  max-width: 920px;
}
.cs-hero__eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal-600);
  margin: 0 0 var(--space-3);
}
.cs-hero__h1 {
  font-size: clamp(40px, 5vw, 60px);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--color-navy-800);
  margin: 4px 0 22px;
}
.cs-hero__h1 em {
  font-style: italic;
  color: var(--color-teal-600);
}
.cs-hero__lede {
  font-size: 17px;
  line-height: 1.55;
  color: var(--color-text-secondary);
  max-width: 720px;
  margin: 0 0 var(--space-6);
}

.cs-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}
.cs-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: var(--border-thin);
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 150ms ease, color 150ms ease, background 150ms ease;
}
.cs-nav__link:hover {
  border-color: var(--color-teal-600);
  color: var(--color-navy-800);
  text-decoration: none;
}

.cs-index__section {
  padding: 56px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  border-top: var(--border-thin);
  scroll-margin-top: 80px;
}
.cs-index__eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal-600);
  margin: 0 0 var(--space-2);
}
.cs-index__section .cs-index__eyebrow {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-transform: none;
  color: var(--color-navy-800);
  margin-bottom: var(--space-2);
}
.cs-index__lede {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 720px;
  margin: 0 0 var(--space-6);
}

.cs-index__subgroup {
  margin-bottom: var(--space-7);
}
.cs-index__subgroup:last-child {
  margin-bottom: 0;
}
.cs-index__subhead {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin: 0 0 var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin);
}

.cs-index__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 12px;
}

.cs-index__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: var(--border-thin);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  text-decoration: none;
  transition: border-color 150ms ease, background 150ms ease;
}
.cs-index__item:hover {
  border-color: var(--color-teal-600);
  background: var(--color-bg-tint);
  text-decoration: none;
}
.cs-index__customer {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-navy-800);
  line-height: 1.3;
}
.cs-index__use {
  display: block;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.cs-cta {
  background: var(--color-bg-soft);
  padding: 64px 24px;
  border-top: var(--border-thin);
}
.cs-cta__inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.cs-cta__h {
  font-size: clamp(28px, 3.5vw, 38px);
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--color-navy-800);
  margin: 0 0 var(--space-3);
}
.cs-cta__lede {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.55;
  margin: 0 0 var(--space-5);
}
.cs-cta__btns {
  display: inline-flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---- Detail page (per-customer) ------------------------------------- */

.cs-detail {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

.cs-detail__hero {
  padding: 64px 0 32px;
  border-bottom: var(--border-thin);
}
.cs-detail__eyebrow {
  font-size: 13px;
  font-weight: 500;
  margin: 0 0 var(--space-4);
}
.cs-detail__eyebrow a {
  color: var(--color-teal-600);
  text-decoration: none;
}
.cs-detail__eyebrow a:hover {
  text-decoration: underline;
}
.cs-detail__h1 {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--color-navy-800);
  margin: 0 0 var(--space-3);
}
.cs-detail__lede {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-text-secondary);
  margin: 0;
  max-width: 720px;
}

.cs-detail__body {
  padding: 40px 0 48px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text-primary);
}
.cs-detail__body h2 {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--color-navy-800);
  margin: 36px 0 12px;
}
.cs-detail__body h2:first-child {
  margin-top: 0;
}
.cs-detail__body h3 {
  font-size: 17px;
  font-weight: 500;
  color: var(--color-navy-800);
  margin: 24px 0 8px;
}
.cs-detail__body p {
  margin: 0 0 var(--space-4);
}
.cs-detail__body ul,
.cs-detail__body ol {
  margin: 0 0 var(--space-4);
  padding-left: 24px;
}
.cs-detail__body li {
  margin-bottom: var(--space-2);
}
.cs-detail__body a {
  color: var(--color-teal-600);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.cs-detail__body a:hover {
  color: var(--color-teal-1000);
}
.cs-detail__body strong {
  font-weight: 500;
  color: var(--color-navy-800);
}
.cs-detail__body hr {
  border: none;
  border-top: var(--border-thin);
  margin: 36px 0;
}

/* Customer Quote section — make it stand out without restructuring HTML.
   The quote is the <p> immediately after the "Customer Quote" h2. */
.cs-detail__body h2 + p:has(+ h2),
.cs-detail__body h2:where([id*="quote"], [id*="Quote"]) + p {
  /* Fallback styling done globally below — this :has selector is broadly
     supported but not universal; the rule below catches the common case. */
}

.cs-detail__cta {
  text-align: center;
  padding: 48px 0;
  border-top: var(--border-thin);
  border-bottom: var(--border-thin);
  margin: 24px 0;
}
.cs-detail__cta-h {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-navy-800);
  margin: 0 0 var(--space-4);
}
.cs-detail__cta-btns {
  display: inline-flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.cs-related {
  padding: 24px 0 64px;
}
.cs-related__h {
  font-size: 15px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-tertiary);
  margin: 0 0 var(--space-4);
}
.cs-related__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: var(--space-4);
}
.cs-related__card {
  display: block;
  padding: 14px 16px;
  border: var(--border-thin);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  text-decoration: none;
  transition: border-color 150ms ease, background 150ms ease;
}
.cs-related__card:hover {
  border-color: var(--color-teal-600);
  background: var(--color-bg-tint);
  text-decoration: none;
}
.cs-related__name {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-navy-800);
}
.cs-related__more {
  margin: 0;
  font-size: 14px;
}
.cs-related__more a {
  color: var(--color-teal-600);
  text-decoration: none;
  font-weight: 500;
}
.cs-related__more a:hover {
  text-decoration: underline;
}

/* ---- Mobile --------------------------------------------------------- */

@media (max-width: 900px) {
  .cs-hero { padding: 48px 24px 24px; }
  .cs-index__section { padding: 40px 24px; }
  .cs-index__grid { grid-template-columns: 1fr; }
  .cs-related__grid { grid-template-columns: 1fr; }
  .cs-detail__body { font-size: 15px; }
  .cs-detail__hero { padding: 40px 0 24px; }
}