/* ==========================================================================
   Case study deep-dive pages
   ========================================================================== */
.cs-hero {
  --project-accent: var(--accent);
  min-height: 78svh; display: flex; flex-direction: column; justify-content: flex-end;
  padding: calc(var(--2xl) + 1rem) var(--gutter) var(--xl);
  position: relative; overflow: hidden;
  border-bottom: 2px solid var(--border-strong);
}
.cs-hero .cs-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(120% 100% at 80% 0%, color-mix(in srgb, var(--project-accent) 16%, transparent), transparent 60%),
    var(--bg-inset);
}
.cs-hero .cs-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 60px 60px; opacity: 0.35;
  -webkit-mask-image: linear-gradient(to top, #000, transparent 75%);
          mask-image: linear-gradient(to top, #000, transparent 75%);
}
.cs-hero-inner { position: relative; z-index: 2; max-width: var(--maxw); margin: 0 auto; width: 100%; }
.cs-breadcrumb {
  font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.12em; color: var(--text-secondary); margin-bottom: var(--lg);
  display: flex; gap: var(--sm); align-items: center;
}
.cs-breadcrumb a:hover { color: var(--accent); }
.cs-cat {
  font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.18em; color: var(--accent-deep);
  display: flex; gap: var(--md); align-items: center; margin-bottom: var(--md);
}
.cs-cat::before { content: ""; width: 60px; height: 2px; background: var(--project-accent); }
.cs-title { font-size: clamp(3rem, 11vw, 8.5rem); line-height: 0.9; letter-spacing: -0.04em; font-weight: 400; }
.cs-oneliner { font-size: clamp(1.15rem, 2.2vw, 1.6rem); color: var(--text-secondary); max-width: 50ch; margin-top: var(--lg); }
.cs-facts {
  display: flex; flex-wrap: wrap; gap: var(--xl); margin-top: var(--xl);
  border-top: 1px solid var(--border); padding-top: var(--lg);
}
.cs-facts .fact .k {
  font-family: var(--font-mono); font-size: 0.66rem; text-transform: uppercase;
  letter-spacing: 0.12em; color: var(--text-faint); display: block; margin-bottom: 4px;
}
.cs-facts .fact .v { font-family: var(--font-display); font-size: 1.4rem; }

/* content blocks */
.cs-block { max-width: var(--maxw); margin: 0 auto; padding: clamp(3rem,7vw,6rem) var(--gutter); }
.cs-block-grid { display: grid; grid-template-columns: 0.4fr 1fr; gap: clamp(1.5rem, 5vw, 5rem); align-items: start; }
.cs-block-grid h2 { font-size: var(--h3); position: sticky; top: 100px; }
.cs-block-grid .num {
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent-deep);
  letter-spacing: 0.1em; display: block; margin-bottom: var(--sm);
}
.cs-prose p { font-size: 1.15rem; color: var(--text-secondary); margin-bottom: var(--md); max-width: 64ch; }
.cs-prose p strong { color: var(--text-primary); }
.cs-prose ul { margin: var(--md) 0 var(--md) 0; padding-left: var(--md); color: var(--text-secondary); }
.cs-prose li { margin-bottom: var(--sm); max-width: 60ch; }
@media (max-width: 760px) {
  .cs-block-grid { grid-template-columns: 1fr; gap: var(--md); }
  .cs-block-grid h2 { position: static; }
}

/* tech stack badges + code */
.tech-badges { display: flex; flex-wrap: wrap; gap: var(--sm); margin: var(--md) 0 var(--lg); }
.tech-badges span {
  font-family: var(--font-mono); font-size: 0.74rem; padding: 6px 12px;
  border: 1px solid var(--border); border-radius: var(--r-std);
  background: var(--bg-secondary); color: var(--text-secondary);
}
.tech-badges span b { color: var(--accent-deep); font-weight: 500; margin-right: 6px; }
pre.code {
  font-family: var(--font-mono); font-size: 0.82rem; line-height: 1.7;
  background: #14130d; color: #e8e4d8; padding: var(--lg); border-radius: var(--r-std);
  overflow-x: auto; margin: var(--md) 0; border: 1px solid var(--border-strong);
}
pre.code .c { color: #6b8f6b; }   /* comment */
pre.code .k { color: #5ec8b8; }   /* keyword */
pre.code .s { color: #d8b878; }   /* string */

/* visual showcase grid */
.cs-gallery {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--md);
  max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter) clamp(3rem,7vw,6rem);
}
.cs-shot {
  position: relative; overflow: hidden; border-radius: var(--r-std);
  border: 1px solid var(--border); background: var(--bg-inset);
  aspect-ratio: 16/10; display: grid; place-items: center;
}
.cs-shot.wide { grid-column: span 12; aspect-ratio: 21/9; }
.cs-shot.half { grid-column: span 6; }
.cs-shot.third { grid-column: span 4; }
.cs-shot .placeholder {
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-faint);
  text-align: center; letter-spacing: 0.08em; text-transform: uppercase; padding: var(--md);
}
.cs-shot .placeholder .dim { display:block; color: var(--accent-deep); margin-top: 6px; }
.cs-shot img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 760px) {
  .cs-shot.half, .cs-shot.third { grid-column: span 12; }
}

/* results metrics */
.cs-metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px,1fr)); gap: var(--lg); margin: var(--lg) 0; }
.cs-metric { border-top: 2px solid var(--border-strong); padding-top: var(--md); }
.cs-metric .n { font-family: var(--font-display); font-size: clamp(2.4rem,5vw,3.6rem); color: var(--accent-deep); letter-spacing: -0.02em; }
.cs-metric .l { font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); }

/* CTA band */
.cs-cta {
  border-top: 2px solid var(--border-strong); background: var(--bg-secondary);
  padding: clamp(3rem,8vw,6rem) var(--gutter); text-align: center;
}
.cs-cta h2 { font-size: clamp(2.2rem,6vw,4rem); margin-bottom: var(--lg); }
.cs-cta h2 .marker { font-style: italic; }

/* prev/next nav */
.cs-pager {
  max-width: var(--maxw); margin: 0 auto; display: flex; justify-content: space-between;
  padding: var(--lg) var(--gutter); border-top: 1px solid var(--border); gap: var(--md); flex-wrap: wrap;
}
.cs-pager a { font-family: var(--font-mono); font-size: var(--small); text-transform: uppercase; letter-spacing: 0.08em; }
.cs-pager a:hover { color: var(--accent); }
.cs-pager .next { text-align: right; }
.cs-pager .lbl { display:block; color: var(--text-faint); font-size: 0.66rem; margin-bottom: 4px; }