/* ===== CASE STUDY LAYOUT ===== */
.cs-main { padding-top: var(--nav-h); }

/* HERO */
.cs-hero {
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
/* Grid background matching homepage */
.cs-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black, transparent 85%);
  pointer-events: none;
}
/* subtle accent orb top right */
.cs-hero::after {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--accent), transparent 65%);
  top: -300px; right: -200px;
  opacity: 0.06;
  border-radius: 50%;
  pointer-events: none;
}

.cs-hero-container {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* Back link */
.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-3);
  text-decoration: none;
  margin-bottom: 48px;
  transition: color 0.2s ease;
}
.cs-back:hover { color: var(--accent); }
.cs-back svg { transition: transform 0.2s var(--ease-out); }
.cs-back:hover svg { transform: translateX(-4px); }

/* Hero tag — same as section-tag */
.cs-hero-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

/* Hero title — large display */
.cs-hero-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 80px);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.04em;
  color: var(--text-1);
  margin-bottom: 24px;
  max-width: 900px;
}
.cs-hero-title em {
  font-style: normal;
  background: linear-gradient(130deg, var(--accent) 0%, var(--violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cs-hero-sub {
  font-size: 18px;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 580px;
  margin-bottom: 56px;
}

/* Project brief strip */
.cs-brief {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--surface);
  max-width: 800px;
}
.cs-brief-item {
  padding: 20px 24px;
  border-right: 1px solid var(--border);
}
.cs-brief-item:last-child { border-right: none; }
.cs-brief-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 6px;
  display: block;
}
.cs-brief-value {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-1);
  line-height: 1.4;
}

/* COVER IMAGE */
.cs-cover {
  width: 100%;
  max-height: 620px;
  overflow: hidden;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.cs-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* CONTENT TYPOGRAPHY */
.cs-lead {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 500;
  color: var(--text-1);
  line-height: 1.45;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  max-width: 760px;
}

.cs-body {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.85;
  max-width: 720px;
}
.cs-body + .cs-body,
.cs-body + .cs-lead,
.cs-lead + .cs-body { margin-top: 20px; }

/* PULL QUOTE */
.cs-pullquote {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.35;
  letter-spacing: -0.025em;
  padding: 56px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: 64px 0;
  max-width: 860px;
}
.cs-pullquote em {
  font-style: normal;
  color: var(--accent);
}

/* FIGURES */
.cs-figure { margin: 0; }
.cs-figure-img {
  width: 100%;
  display: block;
  border-radius: var(--r);
  border: 1px solid var(--border);
}
.cs-figure-caption {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.5;
  margin-top: 14px;
  padding-left: 16px;
  border-left: 2px solid var(--accent);
}
.cs-figure-full { margin: 64px 0; }
.cs-figure-full .cs-figure-img { border-radius: 20px; }
.cs-figure-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 64px 0;
}
.cs-figure-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 64px 0;
}
.cs-figure-grid-2 .cs-figure-caption,
.cs-figure-grid-3 .cs-figure-caption { font-size: 12px; }

/* INSIGHT / CALLOUT CARDS */
.cs-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 56px;
}
.cs-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 28px 28px 32px;
  transition: border-color 0.25s ease, transform 0.3s var(--ease-out), box-shadow 0.3s ease;
}
.cs-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.35);
}
.cs-card-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  display: block;
}
.cs-card-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.cs-card-body {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.65;
}

/* TWO COLUMN */
.cs-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

/* STATS */
.cs-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  margin-top: 64px;
}
.cs-stat {
  background: var(--surface);
  padding: 40px 36px;
  transition: background 0.2s ease;
}
.cs-stat:hover { background: var(--surface2); }
.cs-stat-num {
  font-family: var(--font-display);
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.04em;
  line-height: 1;
  display: block;
  margin-bottom: 12px;
}
.cs-stat-label {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.5;
  max-width: 180px;
}

/* NEXT PROJECT */
.cs-next {
  border-top: 1px solid var(--border);
}
.cs-next-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--section-py) var(--pad);
}
.cs-next-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  display: block;
  margin-bottom: 24px;
}
.cs-next-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  text-decoration: none;
}
.cs-next-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4.5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text-2);
  transition: color 0.3s ease;
  line-height: 1.05;
}
.cs-next-link:hover .cs-next-title { color: var(--text-1); }
.cs-next-arrow {
  flex-shrink: 0;
  width: 64px; height: 64px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  transition: all 0.3s var(--ease-out);
}
.cs-next-link:hover .cs-next-arrow {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  transform: translateX(8px);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .cs-hero { padding: 80px 0 64px; }
}
@media (max-width: 768px) {
  .cs-hero { padding: 64px 0 48px; }
  .cs-hero-title { font-size: clamp(32px, 9vw, 56px); }
  .cs-hero-sub { font-size: 16px; margin-bottom: 40px; }
  .cs-hero-tag { margin-bottom: 14px; }
  .cs-back { margin-bottom: 32px; }
  .cs-two-col { grid-template-columns: 1fr; gap: 40px; }
  .cs-figure-grid-2 { grid-template-columns: 1fr; }
  .cs-figure-grid-3 { grid-template-columns: 1fr 1fr; }
  .cs-figure-full { margin: 40px 0; }
  .cs-brief { grid-template-columns: 1fr 1fr; }
  .cs-brief-item:nth-child(2n) { border-right: none; }
  .cs-brief-item:nth-child(n+3) { border-top: 1px solid var(--border); }
  .cs-stats { grid-template-columns: 1fr 1fr; }
  .cs-next-arrow { width: 48px; height: 48px; }
  .cs-lead { font-size: clamp(18px, 4vw, 24px); }
  .cs-body { font-size: 16px; }
  .cs-pullquote { font-size: clamp(18px, 4.5vw, 28px); padding: 40px 0; margin: 40px 0; }
  .cs-cards { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .cs-hero { padding: 48px 0 36px; }
  .cs-figure-grid-3 { grid-template-columns: 1fr; }
  .cs-stats { grid-template-columns: 1fr 1fr; }
  .cs-brief { grid-template-columns: 1fr; }
  .cs-brief-item { border-right: none; border-bottom: 1px solid var(--border); }
  .cs-brief-item:last-child { border-bottom: none; }
  .mobile-link { font-size: 32px; }
}