/* ============================================================
   KINGSBUILD — CATALOGUE PAGE CSS
   Phase 3: Product Listing, Filters, Sort, Grid/List Views
   ============================================================ */

/* ── Page Shell ── */
.catalogue-page {
  min-height: 100vh;
  background: var(--kb-white);
}

/* ── Catalogue Hero / Page Banner ── */
.catalogue-banner {
  background: var(--kb-black);
  padding: 2rem 0 1.75rem;
  border-bottom: 1px solid var(--kb-iron);
  position: relative;
  overflow: hidden;
}
.catalogue-banner::before {
  content: '';
  position: absolute;
  right: -4rem;
  top: -4rem;
  width: 28rem;
  height: 28rem;
  background: radial-gradient(circle, rgba(201,168,76,0.08) 0%, transparent 65%);
  pointer-events: none;
}
.catalogue-banner__inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.catalogue-banner__title {
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--kb-pure-white);
  line-height: 0.95;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.catalogue-banner__title span { color: var(--kb-gold); }
.catalogue-banner__meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.catalogue-banner__count {
  font-family: var(--font-condensed);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}
.catalogue-banner__count strong {
  color: var(--kb-gold);
  font-size: 1rem;
}

/* ── Layout: Sidebar + Main ── */
.catalogue-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: 0;
  align-items: start;
  min-height: 60vh;
}

/* ══════════════════════════════════════════
   FILTER SIDEBAR
══════════════════════════════════════════ */
.filter-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--header-top-height) + 1rem);
  border-right: 1px solid var(--kb-ash);
  background: var(--kb-pure-white);
  height: calc(100vh - var(--header-height) - var(--header-top-height) - 2rem);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--kb-fog) transparent;
}
.filter-sidebar::-webkit-scrollbar { width: 4px; }
.filter-sidebar::-webkit-scrollbar-thumb { background: var(--kb-fog); border-radius: 2px; }

.filter-sidebar__header {
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 1px solid var(--kb-ash);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background: var(--kb-pure-white);
  z-index: 2;
}
.filter-sidebar__title {
  font-family: var(--font-condensed);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--kb-charcoal);
}
.filter-clear-all {
  font-family: var(--font-condensed);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--kb-gold-dark);
  text-decoration: underline;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}
.filter-clear-all.visible {
  opacity: 1;
  pointer-events: auto;
}

/* Filter Group */
.filter-group {
  border-bottom: 1px solid var(--kb-ash);
}
.filter-group__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-condensed);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--kb-charcoal);
  transition: color var(--transition-fast);
}
.filter-group__toggle:hover { color: var(--kb-gold-dark); }
.filter-group__chevron {
  flex-shrink: 0;
  transition: transform var(--transition-base);
  color: var(--kb-concrete);
}
.filter-group.is-open .filter-group__chevron { transform: rotate(180deg); }

.filter-group__body {
  padding: 0 1.25rem 1rem;
  display: none;
}
.filter-group.is-open .filter-group__body { display: block; }

/* Checkbox Filter Items */
.filter-option {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.35rem 0;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--kb-graphite);
  transition: color var(--transition-fast);
  user-select: none;
}
.filter-option:hover { color: var(--kb-black); }

.filter-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 1rem;
  height: 1rem;
  border: 1.5px solid var(--kb-fog);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  position: relative;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--kb-pure-white);
}
.filter-checkbox:checked {
  background: var(--kb-gold);
  border-color: var(--kb-gold);
}
.filter-checkbox:checked::after {
  content: '';
  position: absolute;
  inset: 2px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpolyline points='1.5,6 4.5,9 10.5,3' fill='none' stroke='%230D0D0D' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") center/contain no-repeat;
}
.filter-checkbox:focus-visible {
  outline: 2px solid var(--kb-gold);
  outline-offset: 2px;
}

.filter-option__count {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--kb-concrete);
  font-variant-numeric: tabular-nums;
}

/* Price Range Filter */
.price-range {
  padding-top: 0.25rem;
}
.price-range__inputs {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.price-range__sep {
  font-size: 0.75rem;
  color: var(--kb-concrete);
  text-align: center;
}
.price-range__input {
  width: 100%;
  padding: 0.5rem 0.625rem;
  font-family: var(--font-condensed);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--kb-charcoal);
  background: var(--kb-pure-white);
  border: 1.5px solid var(--kb-fog);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast);
  text-align: center;
}
.price-range__input:focus { border-color: var(--kb-gold); box-shadow: 0 0 0 3px rgba(201,168,76,0.12); }
.price-range__apply {
  width: 100%;
  padding: 0.5rem;
  background: var(--kb-black);
  color: var(--kb-gold);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-condensed);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.price-range__apply:hover { background: var(--kb-iron); }

/* Star Rating Filter */
.rating-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0;
  cursor: pointer;
  font-size: 0.875rem;
}
.rating-option .stars { font-size: 0.8rem; }
.rating-option__label { color: var(--kb-steel); font-size: 0.8rem; }

/* Active Filters Bar */
.active-filters {
  display: none;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding: 0.75rem 1.5rem;
  background: var(--kb-gold-pale);
  border-bottom: 1px solid rgba(201,168,76,0.2);
}
.active-filters.has-filters { display: flex; }
.active-filters__label {
  font-family: var(--font-condensed);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--kb-gold-dark);
  flex-shrink: 0;
}
.active-filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.6rem;
  background: var(--kb-gold);
  color: var(--kb-black);
  border-radius: var(--radius-full);
  font-family: var(--font-condensed);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--transition-fast);
  border: none;
}
.active-filter-chip:hover { background: var(--kb-gold-light); }
.active-filter-chip__x { font-size: 0.9rem; line-height: 1; }
.active-filters__clear-all {
  font-family: var(--font-condensed);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--kb-gold-dark);
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
  margin-left: auto;
}

/* ══════════════════════════════════════════
   MAIN CATALOGUE AREA
══════════════════════════════════════════ */
.catalogue-main {
  min-width: 0;
}

/* Toolbar: sort, view toggle, results count */
.catalogue-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--kb-ash);
  background: var(--kb-pure-white);
  flex-wrap: wrap;
  position: sticky;
  top: calc(var(--header-height) + var(--header-top-height));
  z-index: var(--z-raised);
}
.toolbar__results {
  font-family: var(--font-condensed);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--kb-steel);
}
.toolbar__results strong { color: var(--kb-charcoal); }

.toolbar__right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Sort Dropdown */
.sort-select {
  appearance: none;
  -webkit-appearance: none;
  padding: 0.45rem 2.25rem 0.45rem 0.875rem;
  font-family: var(--font-condensed);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--kb-charcoal);
  background: var(--kb-pure-white)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2.5'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E")
    right 0.625rem center / 14px no-repeat;
  border: 1.5px solid var(--kb-fog);
  border-radius: var(--radius-md);
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}
.sort-select:focus { border-color: var(--kb-gold); box-shadow: 0 0 0 3px rgba(201,168,76,0.12); }

/* Grid / List View Toggle */
.view-toggle {
  display: flex;
  border: 1.5px solid var(--kb-fog);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.view-btn {
  padding: 0.45rem 0.7rem;
  background: var(--kb-pure-white);
  border: none;
  cursor: pointer;
  color: var(--kb-concrete);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
}
.view-btn + .view-btn { border-left: 1.5px solid var(--kb-fog); }
.view-btn.active {
  background: var(--kb-black);
  color: var(--kb-gold);
}
.view-btn:hover:not(.active) { background: var(--kb-ash); color: var(--kb-charcoal); }

/* Mobile filter toggle button */
.filter-mobile-btn {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--kb-black);
  color: var(--kb-gold);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-condensed);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}
.filter-badge-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.2rem;
  height: 1.2rem;
  background: var(--kb-gold);
  color: var(--kb-black);
  border-radius: 50%;
  font-size: 0.65rem;
  font-weight: 800;
  display: none;
}
.filter-badge-count.visible { display: inline-flex; }

/* ── Products Grid ── */
.catalogue-grid {
  padding: 1.5rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  align-content: start;
}
.catalogue-grid.view-list {
  grid-template-columns: 1fr;
  gap: 0;
}

/* ── Product Card: Catalogue Grid View ── */
.cat-card {
  display: flex;
  flex-direction: column;
  background: var(--kb-pure-white);
  border: 1px solid var(--kb-ash);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.cat-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.cat-card[aria-hidden="true"] { display: none; }

.cat-card__media {
  position: relative;
  background: var(--kb-ash);
  aspect-ratio: 4/3;
  overflow: hidden;
}
.cat-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.cat-card:hover .cat-card__img { transform: scale(1.05); }
.cat-card__badge {
  position: absolute;
  top: 0.625rem;
  left: 0.625rem;
  z-index: 2;
}
.cat-card__discount {
  position: absolute;
  top: 0.625rem;
  right: 0.625rem;
  background: var(--kb-danger);
  color: #fff;
  font-family: var(--font-condensed);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.45rem;
  border-radius: var(--radius-sm);
  z-index: 2;
}
.cat-card__wishlist {
  position: absolute;
  bottom: 0.625rem;
  right: 0.625rem;
  width: 2rem;
  height: 2rem;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(4px);
  border: 1px solid var(--kb-fog);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.9rem;
  z-index: 2;
  opacity: 0;
  transform: scale(0.85);
}
.cat-card:hover .cat-card__wishlist,
.cat-card__wishlist.is-active {
  opacity: 1;
  transform: scale(1);
}
.cat-card__wishlist.is-active { color: #E74C3C; border-color: #E74C3C; }

.cat-card__body {
  padding: 0.875rem 1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.cat-card__brand {
  font-family: var(--font-condensed);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--kb-gold-dark);
}
.cat-card__name {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--kb-charcoal);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.cat-card__name a { color: inherit; }
.cat-card__name a:hover { color: var(--kb-gold-dark); }
.cat-card__sku {
  font-size: 0.7rem;
  color: var(--kb-concrete);
  font-variant-numeric: tabular-nums;
}

.cat-card__rating {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  margin: 0.15rem 0;
}
.cat-card__stars { font-size: 0.75rem; }
.cat-card__rating-val {
  font-family: var(--font-condensed);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--kb-charcoal);
}
.cat-card__review-count { font-size: 0.72rem; color: var(--kb-concrete); }

.cat-card__pricing {
  margin-top: auto;
  padding-top: 0.375rem;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.cat-card__price {
  font-family: var(--font-condensed);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--kb-black);
  line-height: 1;
}
.cat-card__price-orig {
  font-size: 0.8rem;
  color: var(--kb-concrete);
  text-decoration: line-through;
}
.cat-card__unit {
  width: 100%;
  font-size: 0.72rem;
  color: var(--kb-steel);
  margin-top: 0.1rem;
}

.cat-card__footer {
  padding: 0.625rem 1rem 0.875rem;
  border-top: 1px solid var(--kb-ash);
  display: flex;
  gap: 0.5rem;
}
.cat-card__cart-btn {
  flex: 1;
  padding: 0.55rem 0.75rem;
  background: var(--kb-black);
  color: var(--kb-pure-white);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-condensed);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}
.cat-card__cart-btn:hover { background: var(--kb-gold); color: var(--kb-black); }
.cat-card__cart-btn:disabled {
  background: var(--kb-success);
  color: #fff;
  cursor: default;
}
.cat-card__view-btn {
  padding: 0.55rem 0.75rem;
  background: transparent;
  color: var(--kb-graphite);
  border: 1.5px solid var(--kb-fog);
  border-radius: var(--radius-md);
  font-family: var(--font-condensed);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.cat-card__view-btn:hover { border-color: var(--kb-charcoal); background: var(--kb-charcoal); color: #fff; }

/* ── List View Override ── */
.catalogue-grid.view-list .cat-card {
  flex-direction: row;
  border-radius: 0;
  border-left: none;
  border-right: none;
  border-top: none;
  border-bottom: 1px solid var(--kb-ash);
  box-shadow: none;
  transform: none;
}
.catalogue-grid.view-list .cat-card:first-child { border-top: 1px solid var(--kb-ash); }
.catalogue-grid.view-list .cat-card:hover { box-shadow: none; background: #FAFAFA; transform: none; }
.catalogue-grid.view-list .cat-card__media {
  width: 9rem;
  min-width: 9rem;
  aspect-ratio: auto;
  border-radius: 0;
}
.catalogue-grid.view-list .cat-card__body {
  padding: 1rem 1.25rem;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.5rem 1.5rem;
}
.catalogue-grid.view-list .cat-card__info { flex: 1; min-width: 200px; }
.catalogue-grid.view-list .cat-card__price-block {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  min-width: 140px;
}
.catalogue-grid.view-list .cat-card__pricing { flex-wrap: nowrap; flex-direction: column; align-items: flex-end; }
.catalogue-grid.view-list .cat-card__name { -webkit-line-clamp: unset; }
.catalogue-grid.view-list .cat-card__footer {
  border-top: none;
  flex-direction: column;
  padding: 0;
  min-width: 140px;
  justify-content: center;
}
.catalogue-grid.view-list .cat-card__wishlist { opacity: 1; transform: scale(1); }

/* ── Stock indicator ── */
.cat-card__stock {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-condensed);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.stock-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--kb-success);
  flex-shrink: 0;
}
.stock-dot--low { background: var(--kb-warning); }
.stock-dot--out { background: var(--kb-danger); }
.cat-card__stock--in  { color: var(--kb-success); }
.cat-card__stock--low { color: var(--kb-warning); }
.cat-card__stock--out { color: var(--kb-danger); }

/* ── Empty State ── */
.catalogue-empty {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 5rem 2rem;
  gap: 1rem;
}
.catalogue-empty.visible { display: flex; }
.catalogue-empty__icon { font-size: 3.5rem; opacity: 0.3; }
.catalogue-empty__title {
  font-family: var(--font-condensed);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--kb-graphite);
}
.catalogue-empty__text { color: var(--kb-steel); max-width: 320px; }

/* ── Load More ── */
.load-more-bar {
  padding: 2rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
  border-top: 1px solid var(--kb-ash);
}
.load-progress {
  width: 100%;
  max-width: 320px;
  height: 3px;
  background: var(--kb-ash);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.load-progress__fill {
  height: 100%;
  background: var(--kb-gold);
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
}
.load-progress__label {
  font-family: var(--font-condensed);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--kb-steel);
  text-align: center;
}

/* ── Mobile Sidebar Drawer ── */
.filter-drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: calc(var(--z-modal) - 1);
}
.filter-drawer-overlay.is-open { display: block; }

@media (max-width: 1024px) {
  .catalogue-layout { grid-template-columns: 1fr; }

  .filter-sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    width: min(320px, 85vw);
    height: 100vh;
    z-index: var(--z-modal);
    border-right: 1px solid var(--kb-ash);
    box-shadow: var(--shadow-xl);
    transition: left var(--transition-slow);
    padding-top: 0;
  }
  .filter-sidebar.is-open { left: 0; }

  .filter-mobile-btn { display: flex; }
  .catalogue-grid { grid-template-columns: repeat(2, 1fr); }
  .catalogue-toolbar { top: calc(var(--header-height) + var(--header-top-height)); }
}

@media (max-width: 640px) {
  .catalogue-banner__title { font-size: 2.25rem; }
  .catalogue-grid { grid-template-columns: 1fr; padding: 1rem; gap: 0.75rem; }
  .catalogue-grid.view-list .cat-card__media { width: 7rem; min-width: 7rem; }
  .catalogue-toolbar { flex-wrap: nowrap; gap: 0.5rem; }
  .toolbar__results { display: none; }
}