:root {
  /* Case study page layout constants */
  --cs-aside: 240px;
  --cs-gap: 28px;
  --cs-article: 760px;
}

/* Hero */
.cs-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(1200px 600px at 20% 20%, color-mix(in oklab, var(--brand) 18%, transparent), transparent 60%),
    radial-gradient(900px 500px at 90% 10%, color-mix(in oklab, var(--brand-2) 16%, transparent), transparent 55%),
    linear-gradient(180deg, color-mix(in oklab, var(--surface) 15%, transparent), var(--bg));
}

.cs-hero-inner {
  /* Keep container horizontal padding; only control vertical spacing here */
  padding-top: 34px;
  padding-bottom: 22px;
}

.cs-hero .backlink {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 70%, transparent);
  border-radius: 999px;
}
.cs-hero .backlink:hover { color: var(--text); }
.cs-hero .backlink svg { width: 16px; height: 16px; }

.cs-title {
  margin: 16px 0 8px;
  /* Match portfolio H1 typography (see .h1 in main.css) */
  font-family: inherit;
  font-size: clamp(34px, 4vw, 52px);
  letter-spacing: -0.03em;
  line-height: 1.08;
  font-weight: 750;
}

.cs-subtitle {
  margin: 0;
  max-width: 820px;
  color: var(--muted);
  font-size: 15px;
}

.cs-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 14px;
}

.cs-hero-media {
  margin-top: 18px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: 0 20px 60px rgba(2, 6, 23, 0.10);
}
.cs-hero-media img {
  width: 100%;
  height: auto;
  display: block;
}

.kpis {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.kpi {
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 80%, transparent);
  border-radius: 16px;
  padding: 12px;
  display: grid;
  gap: 6px;
}
.kpi strong {
  font-size: 18px;
  letter-spacing: -0.02em;
}
.kpi span {
  font-size: 12px;
  color: var(--muted);
}

/* Layout */
.cs-layout {
  display: grid;
  grid-template-columns: var(--cs-aside) minmax(0, 1fr);
  gap: var(--cs-gap);
  padding: 28px 0 60px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 92px; /* accounts for sticky header */
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 18px;
  padding: 14px;
  box-shadow: 0 18px 40px rgba(2, 6, 23, 0.06);
}

.toc h2 {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--muted) 85%, var(--text));
}

.toc a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 12px;
  color: var(--muted);
  font-size: 13px;
}

.toc a:hover {
  color: var(--text);
  background: color-mix(in oklab, var(--surface-2) 55%, transparent);
}

.toc a[aria-current="true"] {
  color: var(--text);
  background: color-mix(in oklab, var(--brand) 14%, var(--surface));
  border: 1px solid color-mix(in oklab, var(--brand) 22%, var(--border));
}

.toc .pill {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.cs-article {
  max-width: var(--cs-article);
}

.cs-section {
  padding: 22px 0;
  border-bottom: 1px solid color-mix(in oklab, var(--border) 70%, transparent);
  scroll-margin-top: 92px;
}

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

.cs-section h2 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.02em;
}

.cs-q {
  margin-top: 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.cs-q .dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--brand) 75%, var(--brand-2));
  box-shadow: 0 10px 18px color-mix(in oklab, var(--brand) 22%, transparent);
}

.cs-section p {
  margin: 10px 0 0;
  color: color-mix(in oklab, var(--text) 92%, var(--muted));
  font-size: 14px;
}

.cs-section ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: color-mix(in oklab, var(--text) 92%, var(--muted));
  font-size: 14px;
}
.cs-section li { margin: 7px 0; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 14px;
}

.panel {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 18px;
  padding: 14px;
}

.panel h3 {
  margin: 0;
  font-size: 14px;
  letter-spacing: -0.01em;
}

.panel p { margin-top: 8px; font-size: 13px; color: var(--muted); }

.callout {
  margin-top: 14px;
  border: 1px solid color-mix(in oklab, var(--brand) 20%, var(--border));
  background: color-mix(in oklab, var(--brand) 10%, var(--surface));
  border-radius: 18px;
  padding: 14px;
}

.callout strong {
  display: block;
  font-size: 13px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--muted) 85%, var(--text));
}

.callout p { margin-top: 8px; color: var(--text); }

figure {
  margin: 14px 0 0;
}

.figure {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(2, 6, 23, 0.08);
}

.figure img {
  width: 100%;
  height: auto;
  display: block;
}

figcaption {
  padding: 10px 12px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.cs-end {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* Mobile / Tablet */

@media (max-width: 980px) {
  /* Hide TOC on mobile for a cleaner reading experience */
  .cs-layout { grid-template-columns: 1fr; }
  .toc { display: none; }
}


/* Removed: TOC horizontal layout at <=980px per request */


@media (max-width: 520px) {
  .cs-hero-inner { padding: 26px 0 18px; }
  .kpis { grid-template-columns: 1fr; }
}


/* Mixmax / long-form template additions */
.cs-hero.cs-hero--navy {
  border-bottom: 1px solid color-mix(in oklab, var(--border) 70%, transparent);
  background:
    radial-gradient(900px 520px at 10% 15%, color-mix(in oklab, #60a5fa 18%, transparent), transparent 65%),
    radial-gradient(980px 560px at 95% 8%, color-mix(in oklab, var(--brand) 14%, transparent), transparent 70%),
    linear-gradient(180deg, color-mix(in oklab, #0b1220 92%, transparent), var(--bg));
}

.cs-hero.cs-hero--navy .cs-title,
.cs-hero.cs-hero--navy .cs-subtitle,
.cs-hero.cs-hero--navy .backlink {
  /* The navy hero stays dark in BOTH themes — force high-contrast text */
  color: color-mix(in oklab, white 94%, var(--text) 6%);
}

.cs-hero.cs-hero--navy .cs-subtitle {
  color: color-mix(in oklab, white 84%, var(--muted) 16%);
}

.cs-hero.cs-hero--navy .cs-meta .label {
  color: color-mix(in oklab, white 72%, var(--muted) 28%);
}

.cs-hero.cs-hero--navy .cs-meta strong {
  color: color-mix(in oklab, white 92%, var(--text) 8%);
}

.embed {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 18px 44px rgba(2, 6, 23, 0.08);
}

.embed .ratio {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
}

.embed .ratio iframe,
.embed .ratio img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  object-fit: cover;
}

.part-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.part-card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 18px;
  padding: 14px;
  display: grid;
  gap: 8px;
  min-height: 132px;
}

.part-card .part-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.part-card .part-tag {
  font-size: 13px;
  color: var(--muted);
}

.part-card .status {
  font-size: 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface-2) 65%, transparent);
  padding: 4px 8px;
  border-radius: 999px;
  color: color-mix(in oklab, var(--muted) 80%, var(--text));
}

.part-card h3 {
  margin: 0;
  font-size: 16px;
}

.part-card p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.part-card a {
  margin-top: auto;
  width: fit-content;
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.part-card a:hover {
  border-bottom-color: color-mix(in oklab, var(--brand) 55%, var(--border));
}

.figure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.figure-grid .figure {
  margin: 0;
}

/*
  Case study pages can feel tight on smaller desktop widths.
  Add extra left/right breathing room without affecting the sticky header.
*/
@media (max-width: 1180px) {
  .cs-hero .container,
  main > .container {
    padding-left: 32px;
    padding-right: 32px;
  }
}

@media (max-width: 560px) {
  .cs-hero .container,
  main > .container {
    padding-left: 18px;
    padding-right: 18px;
  }
}

@media (max-width: 980px) {
  .part-grid { grid-template-columns: 1fr; }
  .figure-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .cs-hero .container,
  main > .container {
    padding-left: 18px;
    padding-right: 18px;
  }
}


/* Breadcrumb under case study title */
.cs-crumb{margin:10px 0 0;font-size:13px;line-height:1.2;color:var(--muted);} 
.cs-crumb-home{font-weight:600;color:var(--brand);} 
.cs-hero.cs-hero--navy .cs-crumb{color:rgba(255,255,255,0.78);} 
.cs-hero.cs-hero--navy .cs-crumb-home{color:color-mix(in oklab, var(--brand) 90%, white);}