/* ========================================
   Case Study Listing / Index Page
   All classes prefixed csi- to avoid collisions
   ======================================== */

/* Hero */
.csi-hero {
  background: linear-gradient(180deg, #f8f1ff 0%, #FFFBF8 77.6%, rgba(255,255,255,0) 100%);
  padding: 7rem 0 2rem;
  text-align: center;
}
@media (min-width: 768px) {
  .csi-hero { padding: 9rem 0 3rem; }
}

.csi-hero__title {
  font-size: 1.75rem;
  font-weight: var(--fnt-bold, 700);
  color: var(--neutral-900, #111928);
  margin: 0 0 0.75rem;
  text-align: center !important;
}
@media (min-width: 768px) {
  .csi-hero__title { font-size: 2.75rem; }
}

.csi-hero__desc {
  font-size: 1rem;
  color: var(--neutral-600, #4B5563);
  max-width: 680px;
  margin: 0 auto !important;
  line-height: 1.6;
  text-align: center !important;
}
@media (min-width: 768px) {
  .csi-hero__desc { font-size: 1.125rem; }
}

/* Filters */
.csi-filters { padding: 1rem 0 0; }

.csi-filters__bar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: #fff;
  border: 1px solid var(--neutral-100, #F3F4F6);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
@media (min-width: 768px) {
  .csi-filters__bar {
    flex-direction: row;
    align-items: center;
  }
}

.csi-filters__search {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  border: 1px solid var(--neutral-200, #E5E7EB);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
}
.csi-filters__search i {
  color: var(--neutral-400, #9CA3AF);
  font-size: 1.25rem;
}
.csi-filters__input {
  border: none;
  outline: none;
  width: 100%;
  font-size: 0.9375rem;
  color: var(--neutral-900, #111928);
  background: transparent;
}
.csi-filters__input::placeholder {
  color: var(--neutral-400, #9CA3AF);
}

.csi-filters__dropdowns {
  display: flex;
  gap: 0.75rem;
}

/* Dropdown */
.csi-dropdown {
  position: relative;
}

.csi-dropdown__btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.9375rem;
  font-weight: var(--fnt-medium, 500);
  color: var(--neutral-700, #374151);
  background: #fff;
  border: 1px solid var(--neutral-200, #E5E7EB);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.2s;
  white-space: nowrap;
}
.csi-dropdown__btn:hover {
  border-color: var(--purple-200, #DCD7FE);
}
.csi-dropdown__btn i {
  font-size: 1.25rem;
  transition: transform 0.2s;
}
.csi-dropdown.open .csi-dropdown__btn i {
  transform: rotate(180deg);
}
.csi-dropdown.open .csi-dropdown__btn {
  border-color: #673695;
  color: #673695;
}

.csi-dropdown__menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 240px;
  background: #fff;
  border: 1px solid var(--neutral-100, #F3F4F6);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  padding: 0.5rem;
  z-index: 100;
  max-height: 300px;
  overflow-y: auto;
}
.csi-dropdown.open .csi-dropdown__menu {
  display: block;
}

.csi-dropdown__menu label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--neutral-700, #374151);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s;
}
.csi-dropdown__menu label:hover {
  background: var(--neutral-050, #F9FAFB);
}
.csi-dropdown__menu input[type="checkbox"] {
  accent-color: #673695;
  width: 16px;
  height: 16px;
}

/* Active filters */
.csi-active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.csi-active-filters:empty { margin-top: 0; }

.csi-filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  font-size: 0.8125rem;
  font-weight: var(--fnt-medium, 500);
  background: var(--purple-050, #F6F5FF);
  border: 1px solid var(--purple-200, #DCD7FE);
  color: var(--purple-900, #4A1D96);
  border-radius: 16px;
  cursor: pointer;
  transition: background 0.2s;
}
.csi-filter-tag:hover { background: var(--purple-200, #DCD7FE); }
.csi-filter-tag i { font-size: 0.875rem; }

/* Count */
.csi-count {
  font-size: 0.9375rem;
  color: var(--neutral-500, #6B7280);
  margin-bottom: 1.5rem;
}

/* Grid section */
.csi-grid-section { padding: 2rem 0 4rem; }

/* Card */
.csi-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #fff;
  border: 1px solid var(--neutral-100, #F3F4F6);
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, box-shadow 0.2s;
}
.csi-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  text-decoration: none;
  color: inherit;
}

.csi-card__img-wrap {
  height: 180px;
  overflow: hidden;
  background: var(--neutral-050, #F9FAFB);
}
.csi-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.csi-card:hover .csi-card__img {
  transform: scale(1.05);
}

.csi-card__icon-wrap {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #FEEFE2;
  transition: background 0.2s ease;
}
.csi-card__icon-wrap i {
  font-size: 4rem;
  transition: transform 0.3s ease;
}
.csi-card:hover .csi-card__icon-wrap i {
  transform: scale(1.1);
}

.csi-card__industry {
  font-size: 0.75rem;
  font-weight: var(--fnt-semi, 600);
  color: var(--neutral-500, #6B7280);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 0.5rem;
}

.csi-card__desc {
  font-size: 0.875rem;
  color: var(--neutral-600, #4B5563);
  line-height: 1.5;
  margin: 0 0 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.csi-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.25rem;
}

.csi-card__logo {
  max-height: 32px;
  width: auto;
  max-width: 120px;
  margin-bottom: 0.75rem;
  object-fit: contain;
}

.csi-card__title {
  font-size: 1rem;
  font-weight: var(--fnt-semi, 600);
  color: var(--neutral-900, #111928);
  line-height: 1.4;
  margin: 0 0 0.75rem;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.csi-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.csi-card__link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9375rem;
  font-weight: var(--fnt-semi, 600);
  color: #673695;
  margin-top: auto;
}
.csi-card__link i { font-size: 1.125rem; transition: transform 0.2s; }
.csi-card:hover .csi-card__link i { transform: translateX(4px); }

/* Empty state */
.csi-empty {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--neutral-500, #6B7280);
}
.csi-empty i { font-size: 3rem; margin-bottom: 1rem; display: block; }
.csi-empty h3 {
  font-size: 1.25rem;
  font-weight: var(--fnt-semi, 600);
  color: var(--neutral-700, #374151);
  margin: 0 0 0.5rem;
}
.csi-empty p { font-size: 1rem; margin: 0; }

/* Hide filtered-out cards */
.csi-card-col.hidden { display: none; }

/* Pagination */
.csi-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}
.csi-pagination__pages {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 0.25rem;
  align-items: center;
}
.csi-pagination__pages li { margin: 0; }
.csi-pagination__btn,
.csi-pagination__page {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 0.625rem;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  color: #374151;
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.csi-pagination__btn { color: #6b7280; }
.csi-pagination__btn i { font-size: 1.25rem; }
.csi-pagination__btn:hover:not(:disabled),
.csi-pagination__page:hover {
  background: #FFF8F1;
  border-color: #f26739;
  color: #f26739;
}
.csi-pagination__btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.csi-pagination__page.is-active {
  background: #f26739;
  border-color: #f26739;
  color: #fff;
}
.csi-pagination__page.is-active:hover {
  background: #f26739;
  color: #fff;
}
.csi-pagination__ellipsis {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  color: #9ca3af;
}
@media (max-width: 480px) {
  .csi-pagination__btn,
  .csi-pagination__page,
  .csi-pagination__ellipsis {
    min-width: 36px;
    height: 36px;
    font-size: 0.875rem;
  }
}