/* ============================================================
   CASE STUDIES
   ============================================================ */
.case-studies {
  background: var(--clr-bg);
}
.case-studies__header {
  margin-bottom: var(--sp-16);
}

/* Cards list */
.cs-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.cs-card {
  position: relative;
  display: grid;
  grid-template-columns: 55% 45%;
  min-height: 520px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  transition: border-color var(--dur-mid), box-shadow var(--dur-mid);
}
.cs-card:hover {
  border-color: var(--clr-border-glow);
  box-shadow: var(--shadow-card-hover);
}

/* Alternate layout every other card */
.cs-card:nth-child(even) { grid-template-columns: 45% 55%; }
.cs-card:nth-child(even) .cs-card__image { order: 2; }
.cs-card:nth-child(even) .cs-card__body  { order: 1; }

/* Image pane */
.cs-card__image {
  position: relative;
  overflow: hidden;
}
.cs-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease-out-expo);
}
.cs-card:hover .cs-card__img { transform: scale(1.06); }

/* Hover overlay with quick metrics */
.cs-card__metrics {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(79,142,247,0.85) 0%, rgba(8,8,15,0.92) 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-8);
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease-out-expo);
  backdrop-filter: blur(4px);
}
.cs-card:hover .cs-card__metrics { opacity: 1; }

.cs-metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.cs-metric__value {
  font-family: var(--font-display);
  font-size: var(--size-4xl);
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.cs-metric__label {
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  font-family: var(--font-body);
}
.cs-metrics-divider {
  width: 40px;
  height: 1px;
  background: rgba(255,255,255,0.2);
}

/* Body pane */
.cs-card__body {
  padding: var(--sp-12) var(--sp-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--sp-6);
}

.cs-card__tags { display: flex; gap: var(--sp-2); flex-wrap: wrap; }

.cs-card__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 800;
  color: var(--clr-text-primary);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.cs-section-label {
  font-size: var(--size-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-accent);
  font-family: var(--font-body);
  margin-bottom: var(--sp-2);
}
.cs-card__text {
  font-family: var(--font-body);
  font-size: var(--size-base);
  color: var(--clr-text-secondary);
  line-height: 1.75;
}

.cs-card__bullets {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.cs-card__bullet {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  font-size: var(--size-sm);
  color: var(--clr-text-secondary);
  font-family: var(--font-body);
  line-height: 1.5;
}
.cs-card__bullet::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-accent);
  flex-shrink: 0;
  margin-top: 7px;
}

.cs-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-body);
  font-size: var(--size-sm);
  font-weight: 600;
  color: var(--clr-accent);
  transition: gap var(--dur-fast);
  margin-top: auto;
}
.cs-card__link:hover { gap: var(--sp-4); }

@media (max-width: 900px) {
  .cs-card { grid-template-columns: 1fr; min-height: auto; }
  .cs-card:nth-child(even) { grid-template-columns: 1fr; }
  .cs-card:nth-child(even) .cs-card__image, .cs-card:nth-child(even) .cs-card__body { order: unset; }
  .cs-card__image { height: 260px; }
  .cs-card__body { padding: var(--sp-8) var(--sp-6); }
}