:root {
  --bg: #f8f7f4;
  --surface: #ffffff;
  --border: rgba(0,0,0,0.1);
  --border-med: rgba(0,0,0,0.18);
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --text-faint: #9a9a9a;
  --accent: #1a1a1a;
  --accent-text: #fff;
  --subtle-bg: #f0efe9;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
}

:root[data-theme="dark"] {
  --bg: #16161a;
  --surface: #212126;
  --border: rgba(255,255,255,0.08);
  --border-med: rgba(255,255,255,0.16);
  --text: #eeeeec;
  --text-muted: #a3a3aa;
  --text-faint: #707078;
  --accent: #eeeeec;
  --accent-text: #1a1a1a;
  --subtle-bg: #2a2a2f;
  --shadow: 0 1px 3px rgba(0,0,0,0.5), 0 1px 2px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

.hidden { display: none !important; }

header {
  background: var(--surface);
  border-bottom: 0.5px solid var(--border);
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 5;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 38px;
  height: 38px;
  object-fit: contain;
  border-radius: 8px;
  display: block;
}

.header-titles h1 {
  font-size: 16px;
  font-weight: 600;
}

.header-titles p {
  font-size: 12px;
  color: var(--text-muted);
}

.theme-toggle-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 0.5px solid var(--border-med);
  background: transparent;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.theme-toggle-btn:hover { background: var(--bg); color: var(--text); }

main {
  padding: 1.5rem;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.toolbar {
  margin-bottom: 1.5rem;
}

.catalog-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.catalog-layout.no-filters { grid-template-columns: minmax(0, 1fr); }
.catalog-layout.no-filters .catalog-filters { display: none; }

.catalog-filters {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.filters-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.filter-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-med);
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

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

.filter-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.filter-count { font-size: 11px; opacity: 0.65; }

.filter-clear {
  margin-top: 2px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  border: 0.5px solid var(--border-med);
  background: transparent;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
}

.filter-clear:hover:not(:disabled) { background: var(--bg); color: var(--text); }
.filter-clear:disabled { opacity: 0.4; cursor: not-allowed; }

#search {
  width: 100%;
  max-width: 360px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-med);
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  outline: none;
}

#search:focus { border-color: var(--accent); }

#catalog-loading {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-size: 13px;
}

.empty-state {
  grid-column: 1/-1;
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-size: 13px;
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.catalog-card {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.catalog-card-photo {
  width: 100%;
  height: 180px;
  background: var(--subtle-bg);
  position: relative;
}

.group-card { cursor: pointer; transition: border-color 0.15s; }
.group-card:hover { border-color: var(--border-med); }

.variant-count-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0,0,0,0.6);
  color: white;
  font-size: 10px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 99px;
  backdrop-filter: blur(4px);
}

.group-hint {
  margin-top: 8px;
  font-size: 11px;
  color: var(--text-muted);
}

.catalog-breadcrumb {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 1.25rem;
}

.btn-back {
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  border: 0.5px solid var(--border-med);
  background: transparent;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-muted);
}

.btn-back:hover { background: var(--bg); }

.breadcrumb-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.breadcrumb-meta {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 12px;
  margin-left: 4px;
}

.catalog-card-photo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.photo-clickable { cursor: zoom-in; }

.catalog-card-noimg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-size: 12px;
}

.catalog-card-body { padding: 12px 14px 14px; }

.catalog-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.info-wrap {
  position: absolute;
  bottom: 8px;
  right: 8px;
}

.info-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.6);
  color: white;
  font-size: 12px;
  font-style: italic;
  font-family: Georgia, 'Times New Roman', serif;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}

.info-icon:hover, .info-icon:focus, .info-icon:active { background: rgba(0,0,0,0.85); }

.info-tooltip {
  position: absolute;
  bottom: 30px;
  right: 0;
  width: max-content;
  max-width: 220px;
  background: var(--surface);
  color: var(--text);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 11px;
  line-height: 1.4;
  white-space: pre-line;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s, transform 0.15s;
  pointer-events: none;
  z-index: 5;
}

.info-icon:hover + .info-tooltip,
.info-icon:focus + .info-tooltip,
.info-icon:active + .info-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  cursor: zoom-out;
}

.lightbox img {
  width: min(85vw, 800px);
  height: min(85vh, 800px);
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.15);
  color: white;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}

.lightbox-nav:hover { background: rgba(255,255,255,0.3); }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-counter {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255,255,255,0.15);
  color: white;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 99px;
  backdrop-filter: blur(4px);
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-faint);
  font-size: 12px;
}

@media (max-width: 600px) {
  header { padding: 0 1rem; }
  main { padding: 1rem; }
}

@media (max-width: 800px) {
  .catalog-layout { grid-template-columns: minmax(0, 1fr); gap: 14px; }

  .catalog-filters {
    position: static;
    flex-direction: row;
    align-items: center;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .catalog-filters::-webkit-scrollbar { display: none; }

  .filters-title { display: none; }
  .filter-chip { flex-shrink: 0; white-space: nowrap; }
  .filter-chip .filter-count { margin-left: 2px; }
  .filter-clear { flex-shrink: 0; margin-top: 0; white-space: nowrap; }
}