/* ===== CASE STUDIES INDEX PAGE STYLES ===== */

.case-studies-page {
  padding-top: 100px;
}

/* HERO SECTION */
.case-studies-hero {
  padding: 120px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.case-studies-hero h1 {
  font-size: var(--iit-fs-h1);
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--iit-text-primary);
  text-wrap: balance;
}

.case-studies-hero p {
  font-size: var(--iit-fs-body-lg);
  color: var(--iit-text-body);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* FILTERS SECTION */
.case-studies-filters-section {
  padding: 60px 0 40px;
  border-bottom: 1px solid rgba(5, 210, 171, 0.1);
}

.filters-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.filters-label {
  font-size: 16px;
  font-weight: 600;
  color: var(--iit-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.filter-btn {
  padding: 10px 20px;
  background: transparent;
  border: 1.5px solid rgba(5, 210, 171, 0.3);
  color: var(--iit-text-body);
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: var(--iit-font-sans);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.filter-btn:hover {
  border-color: #05D2AB;
  color: #05D2AB;
}

.filter-btn.active {
  background: #05D2AB;
  border-color: #05D2AB;
  color: var(--iit-ink-bg);
}

/* CASE STUDIES GRID */
.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
  margin-bottom: 80px;
}

.case-study-card {
  background: linear-gradient(135deg, rgba(5, 210, 171, 0.08) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid rgba(5, 210, 171, 0.2);
  border-radius: 16px;
  padding: 48px 40px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  opacity: 1;
  transform: scale(1);
  max-height: 100%;
  pointer-events: auto;
}

.case-study-card:hover {
  border-color: rgba(5, 210, 171, 0.4);
  transform: translateY(-8px);
  background: linear-gradient(135deg, rgba(5, 210, 171, 0.12) 0%, rgba(255, 255, 255, 0.04) 100%);
  box-shadow: 0 20px 48px -12px rgba(5, 210, 171, 0.2);
}

/* Hide card with animation */
.case-study-card.hidden {
  opacity: 0;
  pointer-events: none;
  max-height: 0;
  padding: 0 40px;
  margin: 0;
  border: none;
  overflow: hidden;
  transition: opacity 0.3s ease, max-height 0.3s ease, padding 0.3s ease, margin 0.3s ease;
}

/* Industry Badge */
.case-study-card__category {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(5, 210, 171, 0.15);
  color: #05D2AB;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
  width: fit-content;
}

/* Large Metric Highlight */
.case-study-card__metric-highlight {
  display: block;
  font-size: 56px;
  font-weight: 700;
  color: #05D2AB;
  line-height: 1;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}

/* Headline */
.case-study-card__headline {
  font-size: 28px;
  font-weight: 600;
  color: var(--iit-text-primary);
  margin-bottom: 20px;
  line-height: 1.3;
}

/* Summary Copy */
.case-study-card__summary {
  font-size: 16px;
  color: var(--iit-text-body);
  margin-bottom: 24px;
  line-height: 1.7;
}

/* Highlights List */
.case-study-card__highlights {
  list-style: none;
  padding: 0;
  margin: 0 0 24px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.case-study-card__highlights li {
  font-size: 14px;
  color: var(--iit-text-body);
  padding-left: 24px;
  position: relative;
}

.case-study-card__highlights li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  background: #05D2AB;
  border-radius: 50%;
}

/* Results Callout */
.case-study-card__results {
  background: rgba(5, 210, 171, 0.08);
  padding: 16px;
  border-left: 3px solid #05D2AB;
  border-radius: 8px;
  margin-bottom: 28px;
  font-size: 14px;
  color: var(--iit-text-body);
  line-height: 1.6;
}

.case-study-card__results strong {
  color: #05D2AB;
}

/* CTA Button */
.case-study-card__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px 24px;
  background: transparent;
  color: #05D2AB;
  border: 1.5px solid #05D2AB;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.3s ease;
  text-decoration: none;
  cursor: pointer;
  min-height: 44px;
  font-family: var(--iit-font-sans);
}

.case-study-card__cta:hover {
  background: #05D2AB;
  color: var(--iit-ink-bg);
}

/* METRICS OVERVIEW SECTION */
.case-studies-metrics {
  background: linear-gradient(135deg, rgba(5, 210, 171, 0.06) 0%, rgba(255, 255, 255, 0.02) 100%);
  border-top: 1px solid rgba(5, 210, 171, 0.15);
  border-bottom: 1px solid rgba(5, 210, 171, 0.15);
  padding: 100px 0;
  margin-bottom: 80px;
}

.case-studies-metrics h2 {
  font-size: var(--iit-fs-h2);
  font-weight: 600;
  text-align: center;
  margin-bottom: 60px;
  color: var(--iit-text-primary);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
}

.metric-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.metric-card__value {
  display: block;
  font-size: 48px;
  font-weight: 700;
  color: #05D2AB;
  line-height: 1;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}

.metric-card__label {
  display: block;
  font-size: 16px;
  color: var(--iit-text-body);
  font-weight: 500;
  line-height: 1.5;
}

/* CTA SECTION */
.case-studies-cta-section {
  padding: 60px 0;
}

.case-studies-cta {
  background: linear-gradient(135deg, #0a0f1a 0%, #0d1629 100%);
  border: 1px solid rgba(5, 210, 171, 0.2);
  border-radius: 16px;
  padding: 60px 40px;
  text-align: center;
}

.case-studies-cta h2 {
  font-size: 44px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--iit-text-primary);
}

.case-studies-cta p {
  font-size: 18px;
  color: var(--iit-text-body);
  margin-bottom: 32px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* CASE STUDIES SECTION WRAPPER */
.case-studies-section {
  padding: 100px 0;
}

/* TESTIMONIALS SECTION */
.case-studies-testimonials {
  padding: 100px 0;
  background: linear-gradient(135deg, rgba(5, 210, 171, 0.04) 0%, rgba(255, 255, 255, 0.01) 100%);
  border-top: 1px solid rgba(5, 210, 171, 0.1);
  border-bottom: 1px solid rgba(5, 210, 171, 0.1);
  margin-bottom: 80px;
}

.case-studies-testimonials h2 {
  font-size: var(--iit-fs-h2);
  font-weight: 600;
  text-align: center;
  margin-bottom: 60px;
  color: var(--iit-text-primary);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.testimonial-card {
  background: linear-gradient(135deg, rgba(5, 210, 171, 0.06) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid rgba(5, 210, 171, 0.15);
  border-radius: 12px;
  padding: 40px 32px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

.testimonial-card:hover {
  border-color: rgba(5, 210, 171, 0.35);
  background: linear-gradient(135deg, rgba(5, 210, 171, 0.1) 0%, rgba(255, 255, 255, 0.03) 100%);
  box-shadow: 0 16px 40px -8px rgba(5, 210, 171, 0.15);
}

.testimonial-card__content {
  display: flex;
  flex-direction: column;
  gap: 24px;
  flex: 1;
}

.testimonial-card__quote {
  font-size: 16px;
  color: var(--iit-text-body);
  line-height: 1.8;
  font-style: italic;
  position: relative;
  padding-left: 24px;
}

.testimonial-card__quote::before {
  content: '"';
  position: absolute;
  left: 0;
  top: -8px;
  font-size: 48px;
  color: rgba(5, 210, 171, 0.3);
  font-style: normal;
}

.testimonial-card__attribution {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 16px;
  border-top: 1px solid rgba(5, 210, 171, 0.15);
}

.testimonial-card__name {
  display: block;
  font-weight: 600;
  color: #05D2AB;
  font-size: 14px;
}

.testimonial-card__title {
  display: block;
  font-size: 13px;
  color: var(--iit-text-body);
  font-weight: 500;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .case-studies-hero {
    padding: 80px 0 60px;
  }

  .case-studies-hero h1 {
    font-size: 42px;
  }

  .case-studies-hero p {
    font-size: 16px;
  }

  .case-studies-filters-section {
    padding: 40px 0 30px;
  }

  .filters-wrapper {
    gap: 16px;
  }

  .filter-buttons {
    gap: 10px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 13px;
  }

  .case-study-card {
    padding: 36px 28px;
  }

  .case-study-card__metric-highlight {
    font-size: 44px;
    margin-bottom: 8px;
  }

  .case-study-card__headline {
    font-size: 24px;
    margin-bottom: 16px;
  }

  .case-study-card__summary {
    font-size: 15px;
    margin-bottom: 16px;
  }

  .case-study-card__highlights {
    margin-bottom: 16px;
  }

  .case-study-card__results {
    margin-bottom: 20px;
  }

  .case-studies-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 60px;
  }

  .case-studies-testimonials {
    padding: 60px 0;
    margin-bottom: 60px;
  }

  .case-studies-testimonials h2 {
    font-size: 32px;
    margin-bottom: 40px;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .testimonial-card {
    padding: 32px 24px;
  }

  .testimonial-card__quote {
    font-size: 15px;
  }

  .case-studies-metrics {
    padding: 60px 0;
    margin-bottom: 60px;
  }

  .case-studies-metrics h2 {
    font-size: 32px;
    margin-bottom: 40px;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .metric-card__value {
    font-size: 36px;
  }

  .metric-card__label {
    font-size: 14px;
  }

  .case-studies-cta {
    padding: 40px 24px;
  }

  .case-studies-cta h2 {
    font-size: 28px;
  }

  .case-studies-cta p {
    font-size: 16px;
  }

  .case-studies-cta-section {
    padding: 40px 0;
  }
}

@media (max-width: 480px) {
  .case-studies-hero h1 {
    font-size: 32px;
    margin-bottom: 16px;
  }

  .case-studies-hero p {
    font-size: 15px;
  }

  .case-studies-filters-section {
    padding: 30px 0 20px;
  }

  .filters-label {
    font-size: 14px;
  }

  .filter-buttons {
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 14px;
    font-size: 12px;
    min-height: 40px;
  }

  .case-study-card {
    padding: 28px 20px;
  }

  .case-study-card__metric-highlight {
    font-size: 40px;
  }

  .case-study-card__headline {
    font-size: 20px;
  }

  .case-study-card__summary {
    font-size: 14px;
  }

  .case-study-card__highlights {
    gap: 8px;
  }

  .case-study-card__highlights li {
    font-size: 13px;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .testimonial-card {
    padding: 24px 16px;
  }

  .testimonial-card__quote {
    font-size: 14px;
    padding-left: 16px;
  }

  .case-studies-testimonials h2 {
    font-size: 28px;
    margin-bottom: 32px;
  }

  .case-studies-metrics h2 {
    font-size: 28px;
    margin-bottom: 32px;
  }

  .metrics-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .metric-card__value {
    font-size: 32px;
  }

  .case-studies-cta h2 {
    font-size: 24px;
  }

  .case-studies-cta p {
    font-size: 15px;
  }
}