/* ============================================
   CASE STUDIES LISTING PAGE
   ============================================ */

.cs-hero {
  min-height: 60vh;
  background: linear-gradient(160deg, var(--color-hero-dark) 0%, var(--color-hero-mid) 60%, var(--color-hero-light) 100%);
  display: flex;
  align-items: flex-end;
  padding: 160px 0 100px;
  color: var(--color-text-on-dark);
}

.cs-hero h1 { color: #fff; max-width: 700px; }

/* CASE STUDY CARDS */
.cs-listing {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-top: 72px;
  background: var(--color-border-light);
}

.cs-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 440px;
  overflow: hidden;
  transition: var(--transition-default);
  cursor: pointer;
}

.cs-card:hover {
  box-shadow: var(--shadow-elevated);
}

.cs-card:nth-child(even) .cs-card-image { order: 2; }
.cs-card:nth-child(even) .cs-card-content { order: 1; }

.cs-card-image {
  position: relative;
  overflow: hidden;
}

.cs-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  display: block;
}

.cs-card:hover .cs-card-image img {
  transform: scale(1.03);
}

.cs-card-content {
  padding: 64px 56px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--color-surface);
}

.cs-card-content .pill {
  margin-bottom: 24px;
  align-self: flex-start;
}

.cs-card-content h2 {
  font-size: 28px;
  font-weight: 500;
  margin-bottom: 16px;
  color: var(--color-text-primary);
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.cs-card-content p {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.75;
  margin-bottom: 32px;
}

.cs-metrics {
  display: flex;
  gap: 36px;
  padding: 24px 0;
  border-top: 1px solid var(--color-border-light);
  margin-bottom: 32px;
}

.cs-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cs-metric-value {
  font-size: 32px;
  font-weight: 200;
  color: var(--color-brand);
  line-height: 1;
  letter-spacing: -1px;
}

.cs-metric-label {
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

/* FILTER */
.cs-filter {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  padding-top: 16px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--color-text-tertiary);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-default);
}

.filter-btn:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
}

.filter-btn.active {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: #fff;
}

@media (max-width: 1199px) {
  .cs-card-content { padding: 48px 36px; }
}

@media (max-width: 767px) {
  .cs-hero { padding: 120px 0 72px; }
  .cs-card,
  .cs-card:nth-child(even) .cs-card-image,
  .cs-card:nth-child(even) .cs-card-content {
    grid-template-columns: 1fr;
    order: unset;
  }
  .cs-card { grid-template-columns: 1fr; }
  .cs-card-image { height: 240px; }
  .cs-card-content { padding: 36px 24px; }
}