/* ============================================================
   Case study page
   ============================================================ */

.cs-hero {
  position: relative;
  padding-top: calc(var(--nav-height) + clamp(3rem, 8vw, 6rem));
  padding-bottom: clamp(3rem, 6vw, 6rem);
  isolation: isolate;
}
.cs-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-brand-soft);
  opacity: 0.5;
  z-index: -1;
}
.cs-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-bottom: var(--space-4);
}
.cs-meta .pipe { color: var(--fg-dim); }
.cs-hero h1 {
  font-size: var(--fs-4xl);
  margin-bottom: var(--space-4);
  letter-spacing: var(--tracking-tight);
}
.cs-hero .tagline {
  color: var(--fg-muted);
  font-size: var(--fs-md);
  max-width: 56rem;
  margin-bottom: var(--space-6);
}
.cs-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* Pinned video + scrolling caption */
.cs-pin {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-7);
  padding-block: clamp(3rem, 6vw, 6rem);
  align-items: start;
}
.cs-pin-media {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-5));
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  aspect-ratio: 16 / 10;
  background: #000;
}
.cs-pin-media video { width: 100%; height: 100%; object-fit: cover; }
.cs-pin-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}
.cs-pin-text section h3 { font-size: var(--fs-xl); margin-bottom: var(--space-3); text-transform: uppercase; }
.cs-pin-text section p { color: var(--fg-muted); }

@media (max-width: 1024px) {
  .cs-pin { grid-template-columns: 1fr; }
  .cs-pin-media { position: relative; top: 0; }
}

/* Results grid */
.cs-results {
  background: var(--bg-1);
  border-block: 1px solid var(--line);
  padding-block: clamp(4rem, 8vw, 7rem);
}
.cs-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: var(--space-5);
}
.result-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--space-6);
}
.result-card .num {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--fs-3xl);
  line-height: 1;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-3);
}
.result-card p { color: var(--fg-muted); font-size: var(--fs-sm); }

/* Multi-video gallery (Metal Roof Master before/after) */
.cs-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: var(--space-5);
  padding-block: clamp(3rem, 6vw, 6rem);
}
.cs-gallery .video-card { aspect-ratio: 16 / 10; }
.cs-gallery .video-card .vc-meta { inset: auto var(--space-4) var(--space-4) var(--space-4); }
.cs-gallery h2 { grid-column: 1 / -1; text-align: center; margin-bottom: var(--space-4); }

/* Next case CTA */
.cs-next {
  padding-block: clamp(4rem, 10vw, 8rem);
  text-align: center;
}
.cs-next a.btn { margin-top: var(--space-5); }