/* ============================================================
   GoRo — Case Study page styles
   ============================================================ */

.cs-hero {
  position: relative;
  padding: calc(var(--nav-h) + var(--sp-7)) 0 var(--sp-9);
  overflow: hidden;
}
.cs-hero .container { position: relative; z-index: 2; }
.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--hairline-strong);
  color: var(--ink);
  background: var(--cream);
  transition: background var(--d-fast) var(--ease-out), color var(--d-fast) var(--ease-out);
}
.cs-back:hover { background: var(--ink); color: var(--cream); }

.cs-meta-row {
  display: flex;
  gap: 16px;
  margin-top: var(--sp-6);
  margin-bottom: var(--sp-3);
  flex-wrap: wrap;
}
.cs-meta-row .crumb {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.cs-meta-row .crumb strong { color: var(--coral); margin-right: 6px; }

.cs-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(48px, 8vw, 144px);
  line-height: 0.86;
  letter-spacing: -0.045em;
}
.cs-title .accent { color: var(--coral); }

.cs-sub {
  margin-top: var(--sp-5);
  max-width: 64ch;
  font-size: var(--fs-body-lg);
  color: var(--ink-soft);
  line-height: 1.55;
}

.cs-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
  margin-top: var(--sp-7);
  border: 1px solid var(--hairline);
  border-radius: var(--r-xl);
  padding: var(--sp-5);
  background: var(--cream);
}
.cs-stats .stat .num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 3vw, 44px);
  letter-spacing: -0.03em;
  color: var(--coral);
}
.cs-stats .stat .lbl {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 4px;
}
@media (max-width: 800px) {
  .cs-stats { grid-template-columns: repeat(2, 1fr); }
}

.cs-section { padding: var(--sp-9) 0; }
.cs-section h2 { margin-bottom: var(--sp-5); }

.cs-block {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--sp-7);
  align-items: start;
}
.cs-block .label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--coral);
}
.cs-block .body { font-size: var(--fs-body-lg); line-height: 1.6; color: var(--ink-soft); max-width: 60ch; }
.cs-block + .cs-block { margin-top: var(--sp-7); padding-top: var(--sp-7); border-top: 1px solid var(--hairline); }
@media (max-width: 800px) {
  .cs-block { grid-template-columns: 1fr; gap: var(--sp-3); }
}

/* storyboard grid (4 page renders) */
.cs-storyboard {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}
.cs-storyboard .sb-tile {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--paper-2);
  position: relative;
  aspect-ratio: 16/9;
  border: 1px solid var(--hairline);
}
.cs-storyboard .sb-tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s var(--ease-out);
}
.cs-storyboard .sb-tile:hover img { transform: scale(1.03); }
.cs-storyboard .sb-tile .sb-num {
  position: absolute;
  top: 14px;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  background: var(--ink);
  color: var(--cream);
  padding: 4px 10px;
  border-radius: var(--r-pill);
  text-transform: uppercase;
}
@media (max-width: 700px) {
  .cs-storyboard { grid-template-columns: 1fr; }
}

/* arc list (story beats) */
.cs-arc {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}
.cs-arc .beat {
  background: var(--cream);
  border: 1px solid var(--hairline);
  border-radius: var(--r-xl);
  padding: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cs-arc .beat .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--coral);
  letter-spacing: 0.16em;
}
.cs-arc .beat h4 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.025em;
}
.cs-arc .beat p { color: var(--ink-soft); line-height: 1.55; font-size: 14px; }
@media (max-width: 900px) { .cs-arc { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .cs-arc { grid-template-columns: 1fr; } }

/* video frame */
.cs-video {
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--ink);
  aspect-ratio: 16/9;
  position: relative;
}
.cs-video.vertical { aspect-ratio: 9/16; max-width: 360px; margin: 0 auto; }
.cs-video video { width: 100%; height: 100%; object-fit: cover; display: block; }

/* navigate to next case */
.cs-next {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-5);
  margin-top: var(--sp-9);
}
.cs-next a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-6);
  border-radius: var(--r-xl);
  background: var(--cream);
  border: 1px solid var(--hairline);
  transition: background var(--d-fast) var(--ease-out), color var(--d-fast) var(--ease-out);
}
.cs-next a:hover { background: var(--ink); color: var(--cream); }
.cs-next a:hover .cs-next-arr { color: var(--coral); }
.cs-next a .cs-next-lbl {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}
.cs-next a .cs-next-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2vw, 28px);
  letter-spacing: -0.02em;
}
.cs-next a .cs-next-arr { font-size: 22px; }
@media (max-width: 700px) { .cs-next { grid-template-columns: 1fr; } }