/* ============================================
   PTT Website - Cases & Case Detail Styles
   ============================================ */

/* === Cases Hero === */
.cases-hero {
  margin-top: var(--nav-height);
  position: relative;
  height: clamp(180px, 20.8vw, 400px);
  background: url('../images/hero/cases-hero.jpg') center/cover no-repeat;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.cases-hero-bar {
  position: relative;
  z-index: 2;
  background: rgba(255, 255, 255, 0.85);
  width: 100%;
  padding: 20px 60px;
  text-align: center;
}
.cases-hero-bar h1 {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text);
  margin: 0 0 6px;
}
.cases-hero-bar p {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

/* === Filter Bar === */
.cases-filter {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: var(--nav-height);
  z-index: 100;
  padding: 16px 0;
}
.cases-filter .page-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.filter-section {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.filter-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 56px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.filter-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.filter-pill {
  padding: 5px 14px;
  font-size: 0.82rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-light);
  cursor: pointer;
  transition: all .2s;
  white-space: nowrap;
}
.filter-pill:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.filter-pill.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.filter-pill.disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
  background: #f1f5f9;
  color: #94a3b8;
  border-color: #e2e8f0;
}
.filter-pill.disabled:hover {
  background: #f1f5f9;
  color: #94a3b8;
  border-color: #e2e8f0;
}

/* === Stats Summary === */
.cases-stats {
  background: var(--bg);
  padding: 40px 0;
}
.cases-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.cases-stat {
  text-align: center;
  padding: 20px;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.cases-stat strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.cases-stat span {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}

/* === Case Grid === */
.cases-grid-section {
  padding: 48px 0 80px;
  background: var(--bg);
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.case-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow .25s, transform .25s;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.case-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.case-card-img {
  height: 160px;
  background: linear-gradient(135deg, #eef2ff 0%, #dbeafe 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}
.case-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.case-card-img .case-icon {
  opacity: 0.6;
}
.case-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.case-card-tags {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.case-tag {
  font-size: 0.72rem;
  padding: 2px 10px;
  border-radius: 12px;
  font-weight: 500;
  white-space: nowrap;
}
.case-tag.industry {
  background: #eef2ff;
  color: #4338ca;
}
.case-tag.solution {
  background: #ecfdf5;
  color: #047857;
}
.case-card-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
}
.case-card-body > p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 12px;
}
.case-card-meta {
  display: flex;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--text-muted);
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.case-card-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* No results */
.cases-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  grid-column: 1 / -1;
}
.cases-empty .empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}
.cases-empty p {
  font-size: 0.95rem;
}

/* === Case Detail Page === */
.case-detail-hero {
  margin-top: var(--nav-height);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 50px 0;
  color: #fff;
}
.case-detail-hero .page-container {
  max-width: 900px;
}
.case-breadcrumb {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.65);
  margin-bottom: 20px;
}
.case-breadcrumb a {
  color: rgba(255,255,255,0.8);
  text-decoration: underline;
}
.case-breadcrumb span {
  margin: 0 8px;
  color: rgba(255,255,255,0.4);
}
.case-detail-hero h1 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  margin-bottom: 10px;
}
.case-detail-hero .case-detail-subtitle {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.78);
  margin-bottom: 16px;
}
.case-detail-hero .case-detail-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.case-detail-hero .case-detail-tags .case-tag {
  font-size: 0.8rem;
  padding: 4px 14px;
  background: rgba(255,255,255,0.18);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.25);
}

/* Case Content */
.case-detail-body {
  padding: 48px 0 80px;
  background: var(--bg);
}
.case-detail-body .page-container {
  max-width: 900px;
}
.case-section {
  margin-bottom: 40px;
}
.case-section:last-child {
  margin-bottom: 0;
}
.case-section h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.case-section h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 22px;
  background: var(--primary);
  border-radius: 2px;
}
.case-section p {
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.85;
  margin-bottom: 12px;
}
.case-section ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 8px;
}
.case-section li {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
  padding: 10px 14px;
  background: #fff;
  border-radius: 8px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  transition: border-color .2s;
}
/* Case Gallery */
.case-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 8px;
}
.case-gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  border: 1px solid var(--border);
}
.case-gallery-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.1);
}
.case-gallery-item img {
  width: 100%;
  height: auto;
  display: block;
}
.case-gallery-item.single {
  grid-column: 1 / -1;
  max-width: 640px;
  justify-self: center;
}

/* Gallery Lightbox */
.case-lightbox {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15,23,42,0.92);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.case-lightbox.show { display: flex; }
.case-lightbox img {
  max-width: 90vw;
  max-height: 80vh;
  border-radius: 8px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
}
.case-lightbox-close {
  position: absolute;
  top: 20px; right: 30px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  border: none;
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.case-lightbox-close:hover { background: rgba(255,255,255,0.3); }
.case-lightbox-caption {
  color: rgba(255,255,255,0.7);
  margin-top: 16px;
  font-size: 0.85rem;
}
@media (max-width: 640px) { .case-gallery { grid-template-columns: 1fr; } }

.case-section li:hover {
  border-left-color: var(--accent);
}

/* Case Info Sidebar */
.case-info-grid {
  display: grid;
  grid-template-columns: auto 280px;
  gap: 32px;
}
.case-info-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 24px);
  align-self: start;
}
.case-info-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 24px;
  margin-bottom: 16px;
}
.case-info-card h4 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}
.case-info-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
.case-info-item:last-child {
  border-bottom: none;
}
.case-info-item .label {
  color: var(--text-muted);
  min-width: 56px;
}
.case-info-item .value {
  color: var(--text);
  font-weight: 500;
  text-align: right;
}

/* Related Cases */
.related-cases {
  padding: 48px 0 80px;
  background: #fff;
  border-top: 1px solid var(--border);
}
.related-cases h2 {
  margin-bottom: 24px;
  text-align: center;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.related-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 18px;
  border: 1px solid var(--border);
  transition: box-shadow .2s;
  cursor: pointer;
}
.related-card:hover {
  box-shadow: var(--shadow-md);
}
.related-card h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.related-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.related-card .case-tag {
  margin-bottom: 8px;
  display: inline-block;
}

/* === Responsive === */
@media (max-width: 960px) {
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cases-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .case-info-grid {
    grid-template-columns: 1fr;
  }
  .case-info-sidebar {
    position: static;
    order: -1;
  }
  .case-info-sidebar .case-info-card {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .case-section ul {
    grid-template-columns: 1fr;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .cases-grid {
    grid-template-columns: 1fr;
  }
  .cases-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .cases-filter {
    position: static;
  }
  .filter-pills {
    gap: 4px;
  }
  .filter-pill {
    font-size: 0.75rem;
    padding: 4px 10px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .case-section ul {
    grid-template-columns: 1fr;
  }
}