/* ==========================================================================
   ADVENNO PHASE 4 PAGE - CASE STUDIES (SCOPED)
   --------------------------------------------------------------------------
   Scope:
   - case-studies.php only
   - preserve SSR/JS render flow, filters, and pagination logic
   - centralize visual styling for maintainability and theme consistency
   ========================================================================== */

.p4-case-studies-page .p4-case-studies-main {
  padding-top: clamp(4.7rem, 7vw, 5.85rem);
}

.p4-case-studies-page .p4-csl-hero {
  padding-top: 128px;
  padding-bottom: clamp(1.8rem, 3.2vw, 2.8rem);
}

.p4-case-studies-page .p4-csl-hero-copy {
  max-width: 680px;
  margin: 0 auto;
}

.p4-case-studies-page .p4-csl-grid-section,
.p4-case-studies-page .p4-csl-cta-section {
  position: relative;
}

.p4-case-studies-page .csl-hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 2rem);
  margin-top: clamp(1rem, 2.5vw, 1.75rem);
  flex-wrap: wrap;
}

.p4-case-studies-page .csl-hero-stat {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
  white-space: nowrap;
}

.p4-case-studies-page .csl-hero-stat strong {
  color: var(--color-accent);
  font-size: 1.15rem;
  font-weight: 700;
}

.p4-case-studies-page .csl-hero-stat-sep {
  color: rgba(255, 255, 255, 0.18);
  user-select: none;
}

.p4-case-studies-page .csl-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.35rem);
  position: relative;
}

.p4-case-studies-page .csl-filter {
  appearance: none;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 600;
  line-height: 1;
  padding: 0.62rem 1.1rem;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease,
    transform 0.2s ease, box-shadow 0.2s ease;
}

.p4-case-studies-page .csl-filter:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}

.p4-case-studies-page .csl-filter:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.p4-case-studies-page .csl-filter.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #0b1722;
  box-shadow: 0 8px 18px rgba(20, 184, 166, 0.24);
}

.p4-case-studies-page .p4-csl-ssr-list,
.p4-case-studies-page .csl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.p4-case-studies-page .p4-csl-ssr-list {
  margin-bottom: 2.5rem;
}

.p4-case-studies-page #cslGrid {
  display: none;
}

.p4-case-studies-page .p4-csl-ssr-card,
.p4-case-studies-page .csl-card {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  overflow: hidden;
  position: relative;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.p4-case-studies-page .p4-csl-ssr-card:hover,
.p4-case-studies-page .csl-card:hover {
  transform: translateY(-4px);
  border-color: rgba(20, 184, 166, 0.35);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.24);
}

.p4-case-studies-page .csl-card:focus-visible,
.p4-case-studies-page .p4-csl-ssr-title-link:focus-visible,
.p4-case-studies-page .p4-csl-ssr-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.p4-case-studies-page .p4-csl-ssr-img,
.p4-case-studies-page .csl-card-img,
.p4-case-studies-page .csl-placeholder {
  width: 100%;
  height: 210px;
  object-fit: cover;
  display: block;
}

.p4-case-studies-page .csl-card-img-wrap {
  position: relative;
  overflow: hidden;
}

.p4-case-studies-page .csl-card-img {
  transition: transform 0.28s ease;
}

.p4-case-studies-page .csl-card:hover .csl-card-img {
  transform: scale(1.04);
}

.p4-case-studies-page .csl-card-img-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 14, 26, 0.52);
  opacity: 0;
  transition: opacity 0.24s ease;
}

.p4-case-studies-page .csl-card-img-overlay span {
  font-size: 0.82rem;
  font-weight: 600;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  padding: 0.42rem 0.9rem;
}

.p4-case-studies-page .csl-card:hover .csl-card-img-overlay {
  opacity: 1;
}

.p4-case-studies-page .csl-card-badge,
.p4-case-studies-page .p4-csl-ssr-industry {
  font-size: 0.71rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--color-accent);
}

.p4-case-studies-page .csl-card-badge {
  position: absolute;
  top: 0.7rem;
  left: 0.7rem;
  z-index: 2;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(0, 0, 0, 0.5);
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
}

.p4-case-studies-page .csl-card-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(20, 184, 166, 0.65), transparent);
}

.p4-case-studies-page .p4-csl-ssr-body,
.p4-case-studies-page .csl-card-body {
  padding: 1.25rem 1.25rem 1.05rem;
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}

.p4-case-studies-page .p4-csl-ssr-title,
.p4-case-studies-page .csl-card-body h3 {
  margin: 0.45rem 0 0.68rem;
  font-size: 1.08rem;
  line-height: 1.42;
  color: var(--text-primary);
}

.p4-case-studies-page .p4-csl-ssr-title-link {
  color: inherit;
  text-decoration: none;
}

.p4-case-studies-page .p4-csl-ssr-title-link:hover {
  color: var(--color-accent);
}

.p4-case-studies-page .p4-csl-ssr-summary,
.p4-case-studies-page .csl-card-summary {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.72;
  margin-bottom: 0.9rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.p4-case-studies-page .p4-csl-ssr-metric,
.p4-case-studies-page .csl-card-metric {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  margin-bottom: 0.95rem;
}

.p4-case-studies-page .p4-csl-ssr-metric-val,
.p4-case-studies-page .csl-card-metric-val {
  font-size: 1.38rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.15;
}

.p4-case-studies-page .p4-csl-ssr-metric-lbl,
.p4-case-studies-page .csl-card-metric-lbl {
  font-size: 0.79rem;
  color: var(--text-muted);
}

.p4-case-studies-page .p4-csl-ssr-link-wrap,
.p4-case-studies-page .csl-card-link-wrap {
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.11);
  padding-top: 0.9rem;
}

.p4-case-studies-page .p4-csl-ssr-link,
.p4-case-studies-page .csl-card-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.p4-case-studies-page .p4-csl-ssr-link:hover,
.p4-case-studies-page .csl-card:hover .csl-card-link {
  color: var(--color-accent-secondary);
}

.p4-case-studies-page .p4-csl-ssr-link-arrow,
.p4-case-studies-page .p4-csl-card-link-arrow {
  font-size: 0.73rem;
}

.p4-case-studies-page .csl-card .p4-csl-card-link-arrow {
  transition: transform 0.2s ease;
}

.p4-case-studies-page .csl-card:hover .p4-csl-card-link-arrow {
  transform: translateX(4px);
}

.p4-case-studies-page .csl-empty {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-secondary);
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  grid-column: 1 / -1;
}

.p4-case-studies-page .csl-empty p {
  margin-top: 0.4rem;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.p4-case-studies-page .p4-csl-loading-icon {
  font-size: 1.85rem;
  margin-bottom: 0.9rem;
  display: block;
  opacity: 0.5;
}

.p4-case-studies-page .csl-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
}

.p4-case-studies-page .p4-csl-placeholder-gradient {
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.1), rgba(52, 211, 153, 0.08));
}

.p4-case-studies-page .p4-csl-placeholder-icon {
  font-size: 1.95rem;
  opacity: 0.42;
  color: var(--color-accent);
}

.p4-case-studies-page .p4-csl-pagination {
  display: none;
  width: 100%;
  margin-top: 2rem;
}

.p4-case-studies-page .pagination {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.03);
}

.p4-case-studies-page .pagination-btn {
  min-width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.86rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.p4-case-studies-page .pagination-btn:hover:not(.disabled) {
  border-color: rgba(20, 184, 166, 0.35);
  color: var(--text-primary);
}

.p4-case-studies-page .pagination-btn.active {
  background: var(--color-accent);
  color: #0b1722;
}

.p4-case-studies-page .pagination-btn.disabled,
.p4-case-studies-page .pagination-btn[disabled] {
  opacity: 0.48;
  cursor: default;
}

.p4-case-studies-page .p4-csl-pagination-ellipsis {
  border: none;
  background: none;
  pointer-events: none;
}

.p4-case-studies-page .pagination-info {
  margin-top: 0.8rem;
  font-size: 0.83rem;
  color: var(--text-muted);
}

.p4-case-studies-page .p4-csl-cta-card {
  max-width: 820px;
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 3.5rem);
  text-align: center;
  border-radius: 20px;
}

.p4-case-studies-page .p4-csl-cta-title {
  margin-bottom: 0.9rem;
}

.p4-case-studies-page .p4-csl-cta-copy {
  max-width: 640px;
  margin: 0 auto 1.65rem;
  color: var(--text-secondary);
}

[data-theme="light"] .p4-case-studies-page .csl-hero-stat-sep {
  color: rgba(15, 23, 42, 0.26);
}

[data-theme="light"] .p4-case-studies-page .csl-filter {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(15, 23, 42, 0.14);
  color: #334155;
}

[data-theme="light"] .p4-case-studies-page .csl-filter:hover {
  background: #ffffff;
  border-color: rgba(15, 23, 42, 0.26);
  color: #0f172a;
}

[data-theme="light"] .p4-case-studies-page .csl-filter.active {
  color: #ffffff;
  box-shadow: 0 10px 18px rgba(13, 148, 136, 0.22);
}

[data-theme="light"] .p4-case-studies-page .p4-csl-ssr-card,
[data-theme="light"] .p4-case-studies-page .csl-card {
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.96), rgba(248, 250, 252, 0.98));
  border-color: rgba(15, 23, 42, 0.11);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .p4-case-studies-page .p4-csl-ssr-card:hover,
[data-theme="light"] .p4-case-studies-page .csl-card:hover {
  border-color: rgba(13, 148, 136, 0.35);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.12);
}

[data-theme="light"] .p4-case-studies-page .csl-card-badge {
  background: rgba(15, 23, 42, 0.78);
  border-color: rgba(255, 255, 255, 0.22);
}

[data-theme="light"] .p4-case-studies-page .p4-csl-ssr-summary,
[data-theme="light"] .p4-case-studies-page .csl-card-summary {
  color: #475569;
}

[data-theme="light"] .p4-case-studies-page .p4-csl-ssr-metric-lbl,
[data-theme="light"] .p4-case-studies-page .csl-card-metric-lbl {
  color: #64748b;
}

[data-theme="light"] .p4-case-studies-page .p4-csl-ssr-link-wrap,
[data-theme="light"] .p4-case-studies-page .csl-card-link-wrap {
  border-top-color: rgba(15, 23, 42, 0.12);
}

[data-theme="light"] .p4-case-studies-page .csl-empty {
  border-color: rgba(15, 23, 42, 0.18);
  background: rgba(248, 250, 252, 0.72);
  color: #334155;
}

[data-theme="light"] .p4-case-studies-page .pagination {
  background: #ffffff;
  border-color: rgba(15, 23, 42, 0.14);
  box-shadow: 0 8px 16px rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .p4-case-studies-page .pagination-btn {
  color: #334155;
}

[data-theme="light"] .p4-case-studies-page .pagination-btn:hover:not(.disabled) {
  border-color: rgba(13, 148, 136, 0.35);
  color: #0f172a;
}

[data-theme="light"] .p4-case-studies-page .pagination-btn.active {
  color: #ffffff;
}

[data-theme="light"] .p4-case-studies-page .pagination-info {
  color: #64748b;
}

[data-theme="light"] .p4-case-studies-page .p4-csl-cta-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(248, 250, 252, 0.98));
  border-color: rgba(15, 23, 42, 0.1);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

@media (max-width: 900px) {
  .p4-case-studies-page .p4-csl-ssr-list,
  .p4-case-studies-page .csl-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }
}

@media (max-width: 767px) {
  .p4-case-studies-page .p4-case-studies-main {
    padding-top: 4.15rem;
  }

  .p4-case-studies-page .p4-csl-hero {
    padding-top: 104px;
  }

  .p4-case-studies-page .csl-hero-stats {
    gap: 0.65rem;
  }

  .p4-case-studies-page .csl-hero-stat {
    font-size: 0.82rem;
  }

  .p4-case-studies-page .csl-hero-stat strong {
    font-size: 1rem;
  }

  .p4-case-studies-page .csl-filters {
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.3rem;
    scrollbar-width: none;
  }

  .p4-case-studies-page .csl-filters::-webkit-scrollbar {
    display: none;
  }

  .p4-case-studies-page .csl-filter {
    flex: 0 0 auto;
  }

  .p4-case-studies-page .p4-csl-cta-card {
    padding: 2rem 1.25rem;
  }
}

@media (max-width: 500px) {
  .p4-case-studies-page .p4-csl-ssr-list,
  .p4-case-studies-page .csl-grid {
    grid-template-columns: 1fr;
  }

  .p4-case-studies-page .pagination {
    gap: 0.3rem;
    padding: 0.3rem;
  }

  .p4-case-studies-page .pagination-btn {
    min-width: 2rem;
    height: 2rem;
    font-size: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .p4-case-studies-page .csl-card,
  .p4-case-studies-page .p4-csl-ssr-card,
  .p4-case-studies-page .csl-filter,
  .p4-case-studies-page .csl-card-img,
  .p4-case-studies-page .p4-csl-card-link-arrow {
    transition: none;
  }

  .p4-case-studies-page .p4-csl-ssr-card:hover,
  .p4-case-studies-page .csl-card:hover {
    transform: none;
  }
}