/* case study hero */
.cs-hero { position: relative; width: 100%; overflow: hidden; background: var(--paper-2); }
.cs-hero img { width: 100%; aspect-ratio: 21/9; object-fit: cover; display: block; }
.cs-hero .dropzone { aspect-ratio: 21/9; width: 100%; border: 0; }

/* case study header */
.cs-header { padding: clamp(2.5rem,5vw,4rem) 0 clamp(1.5rem,3vw,2.5rem);
  border-bottom: 1px solid var(--line); margin-bottom: clamp(2rem,5vw,3.5rem); }
.cs-header-grid { display: grid; grid-template-columns: 1fr auto;
  gap: 2rem 3rem; align-items: start; }
.cs-kicker { font-family: var(--mono); font-size: .72rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--coral); margin-bottom: .8rem; display: block; }
.cs-title { font-family: var(--display); font-weight: 800;
  font-size: clamp(2rem,5vw,3.5rem); line-height: .96; margin: 0 0 .8rem;
  text-transform: uppercase; letter-spacing: -.015em; }
.cs-roles { font-family: var(--mono); font-size: .72rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--slate); line-height: 1.7; }
.cs-meta dl { margin: 0; display: grid; grid-template-columns: auto 1fr;
  gap: .4rem .8rem; font-family: var(--mono); font-size: .7rem; }
.cs-meta dt { color: var(--slate); text-transform: uppercase;
  letter-spacing: .1em; white-space: nowrap; }
.cs-meta dd { margin: 0; font-weight: 700; text-align: right; }

/* body grid */
.cs-body { display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(2rem,5vw,4rem); margin-bottom: clamp(3rem,6vw,5rem); }
.cs-section-label { font-family: var(--mono); font-size: .7rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--slate); margin: 0 0 .8rem; display: block; }
.cs-section p { font-size: 1.05rem; line-height: 1.72; color: var(--ink-soft);
  max-width: 52ch; margin: 0 0 1.4rem; }
.cs-section .shot { margin-top: .5rem; }
.cs-section .shot img { aspect-ratio: 4/3; object-fit: cover;
  width: 100%; border: 1px solid var(--line); }
.cs-section .shot .dropzone { aspect-ratio: 4/3; }

/* metrics band */
.metrics-band { background: var(--ink); color: var(--paper);
  padding: clamp(2.5rem,5vw,4rem) 0; }
.metrics-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 6vw;
  display: grid; grid-template-columns: repeat(auto-fit,minmax(180px,1fr)); gap: 2rem; }
.metric { border-top: 2px solid var(--coral); padding-top: .8rem; }
.metric .num { font-family: var(--display); font-weight: 900;
  font-size: clamp(2rem,5vw,3.5rem); line-height: .95; color: var(--paper);
  display: block; margin-bottom: .4rem; }
.metric .lbl { font-family: var(--mono); font-size: .68rem; letter-spacing: .14em;
  text-transform: uppercase; color: #9aa3ad; }

/* benchmarks (ALA) */
.benchmarks { margin: 0 0 clamp(3rem,6vw,5rem); padding: 1.2rem 1.4rem;
  background: var(--paper-2); border-left: 3px solid var(--slate); }
.benchmarks h4 { font-family: var(--mono); font-size: .7rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--slate); margin: 0 0 .8rem; }
.benchmarks ul { margin: 0; padding: 0; list-style: none;
  font-family: var(--mono); font-size: .76rem; line-height: 2; }
.benchmarks li { display: flex; justify-content: space-between; gap: 2rem;
  border-bottom: 1px solid var(--line); padding: .2rem 0; }
.benchmarks li:last-child { border: 0; }
.bm-label { color: var(--slate); }
.bm-val { font-weight: 700; text-align: right; }
.bm-val .beat { color: var(--coral); }

/* image strip */
.image-strip { display: grid; grid-template-columns: repeat(3,1fr);
  gap: 1rem; margin: clamp(2.5rem,5vw,4rem) 0; }
.image-strip .shot img { aspect-ratio: 4/3; object-fit: cover;
  width: 100%; border: 1px solid var(--line); }
.image-strip .shot .dropzone { aspect-ratio: 4/3; }

/* outcome */
.cs-outcome { margin-top: clamp(2.5rem,5vw,4rem); margin-bottom: clamp(3rem,6vw,5rem); }
.cs-outcome p { font-size: 1.15rem; line-height: 1.72; color: var(--ink-soft);
  max-width: 64ch; margin: 0 0 1.2rem; }

/* prev / next nav */
.cs-nav { border-top: 2px solid var(--ink); background: var(--paper-2); }
.cs-nav-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 6vw;
  display: grid; grid-template-columns: 1fr 1fr; }
.cs-nav-link { padding: clamp(1.5rem,3vw,2.2rem) 0; text-decoration: none;
  color: var(--ink); display: block; transition: color .2s; }
.cs-nav-link.prev { border-right: 1px solid var(--line); padding-right: 2rem; }
.cs-nav-link.next { padding-left: 2rem; text-align: right; }
.cs-nav-link:hover, .cs-nav-link:focus-visible { color: var(--coral); }
.cs-nav-dir { font-family: var(--mono); font-size: .66rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--slate); display: block; margin-bottom: .3rem; }
.cs-nav-title { font-family: var(--display); font-weight: 700;
  font-size: 1.1rem; text-transform: uppercase; letter-spacing: -.01em; line-height: 1.1; }

/* MVP: hide placeholder content images until real assets arrive.
   Targets only lower .shot placeholders — the hero dropzone stays visible.
   Each placeholder auto-reappears once its .dropzone is replaced by an <img>.
   Remove this block when all case studies have imagery. */
.shot:has(.dropzone) { display: none; }
.image-strip:not(:has(img)) { display: none; }

@media (max-width: 860px) {
  .cs-header-grid { grid-template-columns: 1fr; }
  .cs-body { grid-template-columns: 1fr; }
  .image-strip { grid-template-columns: repeat(2,1fr); }
  .metrics-inner { grid-template-columns: repeat(2,1fr); }
  .cs-hero img { aspect-ratio: 16/9; }
}
@media (max-width: 520px) {
  .image-strip { grid-template-columns: 1fr; }
  .cs-nav-inner { grid-template-columns: 1fr; }
  .cs-nav-link.prev { border-right: none; border-bottom: 1px solid var(--line); padding-right: 0; }
  .cs-nav-link.next { padding-left: 0; text-align: left; }
}