/* ========================================
   KATALOG PAGE — Premium Book Grid
   ======================================== */

/* ---- Search / Filter Bar ---- */
.katalog-filter {
  background: var(--card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 8px;
}
.katalog-filter form {
  display: grid;
  grid-template-columns: 1.2fr .6fr auto;
  gap: 12px;
  align-items: end;
}
.katalog-filter .search-wrap {
  position: relative;
}
.katalog-filter .search-wrap::before {
  content: '🔍';
  position: absolute;
  left: 14px; top: 50%; transform: translateY(-50%);
  font-size: .9rem;
  opacity: .5;
  pointer-events: none;
}
.katalog-filter .search-wrap input {
  padding-left: 40px;
}
.filter-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 10px;
}
.filter-tags .badge {
  animation: badge-pop .3s var(--ease-bounce);
}
@keyframes badge-pop {
  0% { transform: scale(0); }
  100% { transform: scale(1); }
}

/* ---- Book Grid ---- */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

/* ---- Book Card ---- */
.book-card {
  background: var(--card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--tr-med), box-shadow var(--tr-med), border-color var(--tr-med);
  box-shadow: var(--shadow);
}
.book-card:hover {
  transform: translateY(-6px);
  border-color: rgba(232,133,74,.2);
  box-shadow: 0 16px 48px rgba(0,0,0,.35), 0 0 30px rgba(232,133,74,.06);
}

/* Cover */
.book-card .cover-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3/4;
}
.book-card .cover-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease-smooth);
}
.book-card:hover .cover-wrap img {
  transform: scale(1.06);
}
.book-card .cover-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(10,8,6,.85) 100%);
  opacity: 0;
  transition: opacity var(--tr-med);
}
.book-card:hover .cover-overlay { opacity: 1; }
.book-card .cover-badge {
  position: absolute; top: 12px; right: 12px;
  z-index: 2;
}

/* Card body */
.book-card .card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.book-card .book-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
  transition: color var(--tr-fast);
}
.book-card .book-title:hover { color: var(--accent); }
.book-card .book-meta {
  font-size: .85rem;
  color: var(--muted);
  margin-bottom: 12px;
}
.book-card .book-meta .stars {
  color: var(--accent-2);
  letter-spacing: 1px;
}

/* Footer */
.book-card .card-footer {
  margin-top: auto;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 8px;
}
.book-card .price {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
}
.book-card .stock-info {
  font-size: .78rem;
  color: var(--muted);
}
.book-card .card-actions {
  display: flex; gap: 6px;
}
.book-card .card-actions .btn {
  padding: 8px 14px;
  font-size: .82rem;
}

/* Stagger reveal for book cards */
.book-card.reveal.revealed {
  animation: card-stagger .5s var(--ease-smooth) forwards;
}
@keyframes card-stagger {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: none; }
}

/* ---- Pagination ---- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 28px;
  padding: 16px 0;
}
.pagination .btn {
  min-width: 42px;
  text-align: center;
}
.pagination .badge {
  font-size: .85rem;
  padding: 6px 14px;
}

/* ---- Empty state ---- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}
.empty-state .emoji {
  font-size: 3rem;
  margin-bottom: 12px;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .katalog-filter form {
    grid-template-columns: 1fr;
  }
  .book-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
  }
}
@media (max-width: 480px) {
  .book-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .book-card .cover-wrap {
    aspect-ratio: 4/3;
  }
}