/* ============================================================
   DEVLUNIQ SOLUTIONS — Case Studies Redesign Stylesheet
   Clean Corporate Theme (Light/Slate with Corporate Blue Accents)
   ============================================================ */

/* Metrics Dashboard Band */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: -50px;
  position: relative;
  z-index: 10;
  margin-bottom: 60px;
}

.stats-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 20px;
  padding: 35px 24px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.stats-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: #143c8c;
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.stats-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
  border-color: rgba(20, 60, 140, 0.15);
}

.stats-card:hover::after {
  transform: scaleX(1);
}

.stats-icon {
  font-size: 1.6rem;
  color: #143c8c;
  margin-bottom: 20px;
  width: 56px;
  height: 56px;
  background: rgba(20, 60, 140, 0.05);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.stats-card:hover .stats-icon {
  background: #143c8c;
  color: #ffffff;
}

.stats-number {
  font-size: 2.6rem;
  font-weight: 800;
  color: #0f172a;
  line-height: 1.1;
  margin-bottom: 8px;
  font-family: 'Poppins', sans-serif;
}

.stats-label {
  font-size: 0.88rem;
  color: #64748b;
  font-weight: 600;
  line-height: 1.4;
}

/* Category Filter Bar */
.case-filter-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 0 auto 50px;
  max-width: 900px;
}

.case-filter-btn {
  padding: 10px 24px;
  border-radius: 50px;
  border: 1px solid #e2e8f0;
  background: #ffffff;
  color: #64748b;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.01);
}

.case-filter-btn:hover {
  border-color: #143c8c;
  color: #143c8c;
  background: rgba(20, 60, 140, 0.02);
  transform: translateY(-1px);
}

.case-filter-btn.active {
  background: #143c8c;
  color: #ffffff;
  border-color: #143c8c;
  box-shadow: 0 4px 15px rgba(20, 60, 140, 0.15);
}

/* Case Study Grid & Cards */
.case-studies-container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.case-study-card {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: stretch;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 24px;
  padding: 40px;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.03);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.case-study-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
  border-color: rgba(20, 60, 140, 0.18);
}

.case-study-card:nth-child(even) {
  grid-template-columns: 1.2fr 1fr;
}

.case-study-card:nth-child(even) .case-image-col {
  order: 2;
}

.case-study-card:nth-child(even) .case-content-col {
  order: 1;
}

/* Image Column */
.case-image-col {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  min-height: 400px;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
}

.case-image-col img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-study-card:hover .case-image-col img {
  transform: scale(1.04);
}

/* Content Column */
.case-content-col {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.case-category-badge {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: rgba(20, 60, 140, 0.08);
  color: #143c8c;
  margin-bottom: 15px;
}

.case-title {
  font-size: 1.9rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 14px;
  line-height: 1.3;
  font-family: 'Poppins', sans-serif;
}

.case-description {
  font-size: 1.02rem;
  color: #475569;
  line-height: 1.7;
  margin-bottom: 24px;
}

/* Case Points (Challenge, Solution, Result) */
.case-points {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 30px;
}

.case-point-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.case-point-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.85rem;
  font-weight: bold;
}

.case-point-item.challenge .case-point-icon {
  background: rgba(239, 68, 68, 0.08);
  color: #ef4444;
}

.case-point-item.solution .case-point-icon {
  background: rgba(20, 60, 140, 0.08);
  color: #143c8c;
}

.case-point-item.result .case-point-icon {
  background: rgba(16, 185, 129, 0.08);
  color: #10b981;
}

.case-point-text strong {
  color: #0f172a;
  font-size: 0.95rem;
  display: block;
  margin-bottom: 3px;
}

.case-point-text p {
  color: #64748b;
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.5;
}

/* Key Metrics Box Inside Card */
.case-metrics-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  border-top: 1px solid #e2e8f0;
  padding-top: 24px;
  margin-top: 20px;
}

.case-metric-box {
  background: #f8fafc;
  border-radius: 12px;
  padding: 14px 10px;
  text-align: center;
  border: 1px solid #f1f5f9;
  transition: all 0.3s ease;
}

.case-study-card:hover .case-metric-box {
  background: #ffffff;
  border-color: #e2e8f0;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.03);
}

.case-metric-val {
  font-size: 1.45rem;
  font-weight: 800;
  color: #143c8c;
  margin-bottom: 2px;
  font-family: 'Poppins', sans-serif;
}

.case-metric-lbl {
  font-size: 0.72rem;
  color: #64748b;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Accordion Execution Details */
.case-accordion-wrap {
  margin-top: 20px;
  width: 100%;
}

.case-accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  border: 1px solid #e2e8f0;
  background: #f8fafc;
  color: #143c8c;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  outline: none;
}

.case-accordion-trigger:hover {
  background: #143c8c;
  color: #ffffff;
  border-color: #143c8c;
  box-shadow: 0 4px 15px rgba(20, 60, 140, 0.1);
}

.case-accordion-trigger .chevron-icon {
  transition: transform 0.3s ease;
  font-size: 0.8rem;
}

.case-accordion-trigger.open .chevron-icon {
  transform: rotate(180deg);
}

.case-accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  background: #f8fafc;
  border-radius: 0 0 16px 16px;
}

.case-accordion-content.open {
  max-height: 800px; /* Large enough default height limit */
  border: 1px solid #e2e8f0;
  border-top: none;
}

.case-details-inner {
  padding: 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
}

.case-details-inner h5 {
  font-size: 0.95rem;
  color: #0f172a;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tech-stack-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-tag {
  display: inline-block;
  padding: 6px 12px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 50px;
  font-size: 0.78rem;
  color: #475569;
  font-weight: 600;
}

.timeline-flow {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.timeline-step {
  display: flex;
  gap: 12px;
  position: relative;
}

.timeline-step::before {
  content: '';
  position: absolute;
  left: 9px;
  top: 20px;
  bottom: -20px;
  width: 2px;
  background: #e2e8f0;
}

.timeline-step:last-child::before {
  display: none;
}

.timeline-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #143c8c;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: bold;
  color: #143c8c;
  z-index: 1;
  flex-shrink: 0;
}

.timeline-text strong {
  color: #0f172a;
  font-size: 0.88rem;
  display: block;
}

.timeline-text span {
  color: #64748b;
  font-size: 0.8rem;
}

/* Animations & Transitions for Filtering */
.case-study-card {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: opacity 0.35s ease, transform 0.35s ease, display 0.35s ease allow-discrete;
}

.case-study-card.hide-card {
  opacity: 0;
  transform: translateY(10px) scale(0.98);
  display: none !important;
}

/* ============================================================ RESPONSIVENESS */
@media (max-width: 1024px) {
  .case-study-card, .case-study-card:nth-child(even) {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 30px;
  }
  
  .case-study-card:nth-child(even) .case-image-col {
    order: 1;
  }

  .case-study-card:nth-child(even) .case-content-col {
    order: 2;
  }

  .case-image-col {
    min-height: 300px;
    height: 300px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .case-details-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .stats-grid {
    grid-template-columns: 1fr;
    margin-top: -30px;
    gap: 16px;
  }
  
  .stats-card {
    padding: 25px 20px;
  }

  .stats-number {
    font-size: 2.2rem;
  }

  .case-title {
    font-size: 1.5rem;
  }

  .case-metrics-band {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}