/* Case Studies page */

.section-head { max-width: 760px; }
.section-head .eyebrow { display: inline-block; margin-bottom: var(--space-3); }
.section-head h2 { margin-bottom: var(--space-3); }
.section-head .lead { color: var(--ink-muted); }

[data-split] .word { display: inline-block; opacity: 0; transform: translateY(28px); transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out); }
[data-split].is-revealed .word { opacity: 1; transform: translateY(0); }

/* HERO */
.cs-hero {
  padding-top: calc(var(--nav-height) + var(--space-8));
  padding-bottom: var(--space-8);
  background: radial-gradient(circle at 30% 30%, var(--lavender) 0%, transparent 50%), radial-gradient(circle at 70% 70%, var(--peach) 0%, transparent 50%);
  overflow: hidden;
}
.cs-hero-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-7);
  align-items: center;
}
@media (max-width: 880px) {
  .cs-hero-inner { grid-template-columns: 1fr; }
}

.cs-hero-headline {
  font-size: clamp(48px, 6.5vw, 88px);
  font-weight: 800;
  letter-spacing: var(--ls-tighter);
  line-height: var(--lh-tight);
  margin-block: var(--space-4) var(--space-5);
}
.cs-hero-sub {
  color: var(--ink-muted);
  margin-bottom: var(--space-6);
  max-width: 56ch;
}

.cs-hero-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  position: relative;
}
.cs-metric-tile {
  padding: var(--space-5);
  border-radius: var(--radius-xl);
  border: 1px solid var(--ink-hair);
  box-shadow: var(--shadow-2);
  position: relative;
  overflow: hidden;
  animation: tile-bob 7s ease-in-out infinite;
}
.cs-metric-tile:nth-child(1) { transform: translateY(-12px); }
.cs-metric-tile:nth-child(2) { transform: translateY(12px); animation-delay: -2.5s; }
.cs-metric-tile:nth-child(3) { grid-column: span 2; max-width: 70%; margin-inline: auto; animation-delay: -4.5s; }

@keyframes tile-bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

.cs-metric-tile strong {
  font-family: var(--font-display);
  font-size: var(--fs-72);
  font-weight: 800;
  letter-spacing: var(--ls-tighter);
  color: var(--accent);
  line-height: 1;
}
.cs-metric-tile em {
  font-style: normal;
  color: var(--accent);
  font-size: var(--fs-36);
  font-weight: 700;
}
.cs-metric-tile span {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--fs-13, 13px);
  color: var(--ink-muted);
  line-height: var(--lh-normal);
}

/* FILTER */
.cs-filter-section {
  background: var(--surface-1);
  border-block: 1px solid var(--ink-hair);
  padding-block: var(--space-5);
  position: sticky;
  top: var(--nav-height);
  z-index: 20;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.cs-filter-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.cs-filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.cs-filter-label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--ink-muted);
  width: 80px;
  flex-shrink: 0;
}
.cs-filter-pills {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.cs-pill {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--bg);
  border: 1px solid var(--ink-hair);
  font-family: var(--font-display);
  font-size: var(--fs-13, 13px);
  font-weight: 500;
  color: var(--ink-muted);
  cursor: pointer;
  transition: all var(--t-base) var(--ease-out);
}
.cs-pill:hover { color: var(--ink); border-color: var(--ink); }
.cs-pill.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* MASONRY */
.cs-gallery-section { background: var(--bg); padding-block: var(--space-7); }
.cs-masonry {
  column-count: 3;
  column-gap: var(--space-4);
}
@media (max-width: 880px) { .cs-masonry { column-count: 2; } }
@media (max-width: 560px) { .cs-masonry { column-count: 1; } }

.cs-card {
  break-inside: avoid;
  margin-bottom: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--radius-xl);
  border: 1px solid var(--ink-hair);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: transform var(--t-base) var(--ease-out), box-shadow var(--t-base) var(--ease-out);
  cursor: pointer;
}
.cs-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-3); }
.cs-card.is-hidden { display: none; }

.cs-card-tags { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.cs-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--ink-hair);
  color: var(--ink-muted);
}
.cs-tag-feat { background: var(--accent); color: #fff; border-color: var(--accent); }

.cs-card-headline {
  font-family: var(--font-display);
  font-size: var(--fs-22);
  font-weight: 700;
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-snug);
  color: var(--ink);
}
.cs-card-body {
  color: var(--ink-muted);
  font-size: var(--fs-14);
  line-height: var(--lh-relaxed);
}
.cs-card-metrics {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding: var(--space-3);
  background: rgba(255,255,255,0.6);
  border-radius: var(--radius);
}
.cs-card-metrics span { font-size: var(--fs-13, 13px); color: var(--ink-muted); }
.cs-card-metrics strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 800;
  letter-spacing: var(--ls-tighter);
  color: var(--accent);
}
.cs-card-link {
  margin-top: var(--space-2);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-14);
  font-weight: 500;
  color: var(--accent);
}
.cs-card:hover .cs-card-link .arrow { transform: translateX(4px); transition: transform var(--t-base) var(--ease-out); }

.cs-empty {
  text-align: center;
  padding: var(--space-7);
  color: var(--ink-muted);
}
.cs-empty a { color: var(--accent); text-decoration: underline; }

/* FEATURED */
.cs-featured-section { background: var(--surface-1); padding-block: var(--space-9); }
.cs-featured {
  padding: var(--space-7);
  background: linear-gradient(135deg, var(--lavender), var(--surface-1) 70%);
  border: 1px solid var(--ink-hair);
  border-radius: var(--radius-2xl);
}
.cs-featured-head { margin-bottom: var(--space-6); }
.cs-featured-headline {
  font-size: var(--fs-48);
  font-weight: 800;
  letter-spacing: var(--ls-tighter);
  line-height: var(--lh-tight);
  margin-top: var(--space-4);
  max-width: 28ch;
}
.cs-featured-body {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}
@media (max-width: 720px) { .cs-featured-body { grid-template-columns: 1fr; } }
.cs-featured-col h4 {
  font-family: var(--font-display);
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}
.cs-featured-col p {
  color: var(--ink);
  font-size: var(--fs-16);
  line-height: var(--lh-relaxed);
}
.cs-featured-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding: var(--space-5);
  background: rgba(255,255,255,0.7);
  border-radius: var(--radius);
}
@media (max-width: 720px) { .cs-featured-metrics { grid-template-columns: repeat(2, 1fr); } }
.cs-featured-metrics strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-36);
  font-weight: 800;
  letter-spacing: var(--ls-tighter);
  color: var(--accent);
}
.cs-featured-metrics span {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
}
.cs-featured-quote {
  font-family: var(--font-display);
  font-size: var(--fs-22);
  font-style: italic;
  line-height: var(--lh-snug);
  color: var(--ink);
  padding: var(--space-5);
  border-left: 3px solid var(--accent);
  background: rgba(255,255,255,0.5);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: var(--space-5);
}
.cs-featured-quote footer {
  font-family: var(--font-body);
  font-size: var(--fs-13, 13px);
  color: var(--ink-muted);
  font-style: normal;
  margin-top: var(--space-3);
}

.cta-final-section { background: var(--bg); padding-block: var(--space-9); }