/* ============================================================
   Case Studies Page — Card-Based Layout
   ============================================================ */

.case-section {
  background: var(--base-light);
  padding: 16px 0 100px;
}

/* Intro paragraphs */
.case-intro {
  max-width: 60%;
  margin-top: 20px;
}
.case-intro p {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.9);
  margin: 0 0 14px;
}
.case-intro p:last-child {
  margin-bottom: 0;
}

/* Divider */
.divider-line {
  height: 1px;
  background: var(--border-light);
  margin: 48px 0;
}

/* ============================================================
   Case Cards
   ============================================================ */

.case-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.03);
  margin-bottom: 28px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
}

.case-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08), 0 3px 8px rgba(15, 23, 42, 0.05);
}

.case-card:last-child {
  margin-bottom: 0;
}

/* Preview (always visible) */
.case-card-preview {
  padding: 36px 40px;
}

.case-card-title {
  font-family: 'Plus Jakarta Sans', var(--font-sans);
  font-size: 24px;
  font-weight: 700;
  color: var(--brand-navy);
  line-height: 1.35;
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

.case-highlights {
  margin-bottom: 28px;
}

.case-highlights-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-blue);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.case-highlights-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.case-highlights-list li {
  position: relative;
  padding-left: 22px;
  font-size: 16px;
  font-weight: 600;
  color: #0F172A;
  line-height: 1.6;
  margin-bottom: 10px;
}

.case-highlights-list li:last-child {
  margin-bottom: 0;
}

.case-highlights-list li::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-blue);
}

/* Toggle button */
.case-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.case-toggle-arrow {
  transition: transform 0.3s ease;
  display: inline-block;
}

.case-card.is-open .case-toggle-arrow {
  transform: rotate(90deg);
}

/* Details (collapsible) */
.case-card-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease;
}

.case-card-details-inner {
  padding: 0 40px 40px;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.case-card.is-open .case-card-details-inner {
  opacity: 1;
  transform: translateY(0);
}

.case-divider {
  height: 1px;
  background: var(--border-light);
  margin-bottom: 28px;
}

.case-card-details-inner h3 {
  font-family: 'Plus Jakarta Sans', var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--brand-navy);
  margin: 26px 0 12px;
  letter-spacing: -0.005em;
}

.case-card-details-inner h3:first-of-type {
  margin-top: 0;
}

.case-card-details-inner p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin: 0 0 8px;
}

.case-card-details-inner ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.case-card-details-inner li {
  position: relative;
  padding-left: 22px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.case-card-details-inner li::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-blue);
}

.case-card-details-inner li strong {
  color: var(--brand-navy);
  font-weight: 700;
}

/* Disclaimer */
.case-disclaimer {
  margin-top: 0;
}
.case-disclaimer p {
  font-size: 13px;
  line-height: 1.65;
  color: #64748B;
  font-style: italic;
  margin: 0;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 768px) {
  .case-section {
    padding: 8px 0 64px;
  }

  .case-card-preview {
    padding: 28px 24px;
  }

  .case-card-title {
    font-size: 20px;
  }

  .case-highlights-list li {
    font-size: 15px;
  }

  .case-card-details-inner {
    padding: 0 24px 32px;
  }

  .case-card-details-inner h3 {
    font-size: 17px;
  }

  .case-card-details-inner p,
  .case-card-details-inner li {
    font-size: 15px;
  }

  .divider-line {
    margin: 36px 0;
  }

  .case-intro { max-width: 90%; }
  .case-intro p {
    font-size: 16px;
  }
}