/* ============================================================
   COLLECTIONS / PRODUCT LISTING PAGE
   ============================================================ */

/* ── Page Header ─────────────────────────────────────────── */
.collection-header {
  background: var(--black);
  padding: 40px var(--pad) 36px;
  text-align: center;
  border-bottom: 1px solid var(--dark-3);
}

.collection-header .breadcrumb {
  justify-content: center;
  margin-bottom: 12px;
}

.collection-header .breadcrumb a,
.collection-header .breadcrumb span {
  color: rgba(255,255,255,.5);
}

.collection-header .breadcrumb a:hover { color: var(--white); }
.collection-header .breadcrumb .sep { color: rgba(255,255,255,.25); }
.collection-header .breadcrumb .current { color: var(--white); }

.collection-title {
  font-size: clamp(1.5rem, 4vw, 3rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 6px;
}

.collection-count {
  font-size: 12px;
  color: rgba(255,255,255,.4);
  letter-spacing: 0.1em;
}

/* ── Sticky Filter Bar ───────────────────────────────────── */
.filter-bar-wrap {
  position: sticky;
  top: var(--total-top);
  z-index: 40;
  background: var(--white);
  border-bottom: 1px solid var(--light-2);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}

.filter-bar {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 0 var(--pad);
}

.filter-bar::-webkit-scrollbar { display: none; }

.filter-btn {
  flex: 0 0 auto;
  height: 48px;
  padding: 0 18px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-mid);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.filter-btn:hover { color: var(--text); }

.filter-btn.active {
  color: var(--text);
  border-bottom-color: var(--black);
}

.filter-btn.active.has-value {
  color: var(--red);
  border-bottom-color: var(--red);
}

.filter-btn .badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--red);
  color: var(--white);
  font-size: 9px;
  font-weight: 700;
}

.filter-sep {
  width: 1px;
  height: 20px;
  background: var(--light-2);
  flex: 0 0 auto;
  margin: 0 8px;
}

.filter-sort-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex: 0 0 auto;
  padding-left: 16px;
  border-left: 1px solid var(--light-2);
  height: 48px;
}

.filter-sort-wrap label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.sort-select {
  height: 32px;
  padding: 0 28px 0 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  background: var(--off-white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%230a0a0a' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 10px center;
  border: 1px solid var(--light-2);
  border-radius: 0;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

/* ── Filter Dropdown Panels ──────────────────────────────── */
.filter-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--light-2);
  box-shadow: 0 8px 24px rgba(0,0,0,.1);
  z-index: 39;
  transform: translateY(-4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
}

.filter-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.filter-dropdown-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px var(--pad);
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.filter-group-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-chip {
  height: 32px;
  padding: 0 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-mid);
  background: var(--off-white);
  border: 1px solid var(--light-2);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.filter-chip:hover {
  border-color: var(--text);
  color: var(--text);
}

.filter-chip.selected {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.color-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.color-chip {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  position: relative;
  transition: transform 0.15s;
}

.color-chip:hover { transform: scale(1.15); }

.color-chip.selected {
  border-color: var(--black);
  outline: 2px solid var(--white);
  outline-offset: 2px;
}

.price-range-wrap {
  min-width: 220px;
}

.price-range-inputs {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
}

.price-range-inputs input {
  width: 90px;
  height: 32px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--light-2);
  background: var(--off-white);
}

.price-range-inputs .sep-dash {
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Active Filters ──────────────────────────────────────── */
.active-filters {
  padding: 12px var(--pad);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  background: var(--off-white);
  border-bottom: 1px solid var(--light-2);
}

.active-filters-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.active-filter-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 10px 0 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text);
  background: var(--white);
  border: 1px solid var(--light-2);
}

.active-filter-tag button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
  font-size: 14px;
  display: flex;
  align-items: center;
}

.active-filter-tag button:hover { color: var(--red); }

.clear-all-filters {
  font-size: 11px;
  font-weight: 700;
  color: var(--red);
  background: none;
  border: none;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-left: auto;
  text-decoration: underline;
}

/* ── Collections Body ────────────────────────────────────── */
.collection-body {
  padding: 32px var(--pad) 64px;
  background: var(--white);
  min-height: 60vh;
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}

/* ── Load More ───────────────────────────────────────────── */
.load-more-wrap {
  text-align: center;
  padding: 48px 0 0;
}

.load-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 40px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text);
  background: var(--white);
  border: 1.5px solid var(--text);
  cursor: pointer;
  transition: all 0.2s;
}

.load-more-btn:hover {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.load-more-btn .spinner {
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: none;
}

.load-more-btn.loading .spinner { display: block; }
.load-more-btn.loading span { opacity: 0.6; }

.load-more-progress {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Empty State ─────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  grid-column: 1 / -1;
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  color: var(--light-2);
}

.empty-state-icon svg {
  width: 100%;
  height: 100%;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
}

.empty-state h3 {
  font-size: 18px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1280px) {
  .collection-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1024px) {
  .filter-bar { padding: 0 20px; }
  .filter-sort-wrap { display: none; }
}

@media (max-width: 768px) {
  .collection-header { padding: 28px 20px 24px; }
  .collection-body { padding: 20px 12px 48px; }
  .collection-grid { grid-template-columns: repeat(2, 1fr); gap: 1px; }
  .active-filters { padding: 10px 12px; }
  .filter-dropdown-inner { padding: 20px; gap: 24px; }
}

@media (max-width: 480px) {
  .collection-grid { grid-template-columns: repeat(2, 1fr); }
}