/* =============================================================================
   CATALOG — THE GALLERIST
   ===========================================================================
   White-cube gallery aesthetic: architectural, confident, editorial.
   The frame is a neutral curator — clean enough to showcase any style,
   refined enough to signal taste.
   =========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ---------------------------------------------------------------------------
   RESET & BASE
   --------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Catalog chrome tokens — The Gallerist */
  --cat-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --cat-font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  --cat-bg: #fafafa;
  --cat-bg-secondary: #f4f4f4;
  --cat-bg-tertiary: #eaeaea;
  --cat-surface: #ffffff;
  --cat-text: #111111;
  --cat-text-secondary: #555555;
  --cat-text-tertiary: #888888;
  --cat-border: #e0e0e0;
  --cat-border-subtle: #eeeeee;
  --cat-accent: #111111;
  --cat-accent-light: #f0f0f0;
  --cat-accent-text: #ffffff;
  --cat-accent-pop: #E84D0E;

  --cat-radius-sm: 2px;
  --cat-radius-md: 3px;
  --cat-radius-lg: 4px;

  --cat-shadow-sm: none;
  --cat-shadow-md: 0 1px 4px rgba(0, 0, 0, 0.06);
  --cat-shadow-lg: 0 2px 8px rgba(0, 0, 0, 0.08);

  --cat-transition: 180ms ease;
  --cat-nav-height: 56px;
  --cat-sidebar-width: 260px;
}

/* Dark mode — gallery at night */
.cat-dark {
  --cat-bg: #0a0a0a;
  --cat-bg-secondary: #141414;
  --cat-bg-tertiary: #1e1e1e;
  --cat-surface: #141414;
  --cat-text: #ededed;
  --cat-text-secondary: #999999;
  --cat-text-tertiary: #555555;
  --cat-border: #282828;
  --cat-border-subtle: #1c1c1c;
  --cat-accent: #ededed;
  --cat-accent-light: #1e1e1e;
  --cat-accent-text: #0a0a0a;
  --cat-accent-pop: #FF6B35;
  --cat-shadow-sm: none;
  --cat-shadow-md: 0 1px 4px rgba(0, 0, 0, 0.3);
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--cat-font);
  color: var(--cat-text);
  background: var(--cat-bg);
  line-height: 1.55;
  min-height: 100vh;
  letter-spacing: -0.005em;
}

a {
  color: var(--cat-text);
  text-decoration: none;
  transition: color var(--cat-transition);
}

a:hover {
  color: var(--cat-accent-pop);
  text-decoration: none;
}

/* ---------------------------------------------------------------------------
   NAVIGATION (cat-nav)
   --------------------------------------------------------------------------- */
.cat-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--cat-nav-height);
  background: var(--cat-bg);
  border-bottom: 1px solid var(--cat-border);
  display: flex;
  align-items: center;
  padding: 0 32px;
  gap: 40px;
  z-index: 100;
  overflow: hidden;
  box-sizing: border-box;
}

.cat-nav__logo {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--cat-text);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cat-nav__logo:hover {
  text-decoration: none;
  color: var(--cat-text);
}

.cat-nav__links {
  display: flex;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;          /* Firefox */
  -ms-overflow-style: none;       /* IE/Edge */
}
.cat-nav__links::-webkit-scrollbar {
  display: none;                   /* Chrome/Safari */
}

.cat-nav__link {
  display: flex;
  align-items: center;
  padding: 0 14px;
  height: var(--cat-nav-height);
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--cat-text-secondary);
  text-decoration: none;
  border-radius: 0;
  white-space: nowrap;
  transition: color var(--cat-transition);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  box-sizing: border-box;
}

.cat-nav__link:hover {
  color: var(--cat-text);
  background: none;
  text-decoration: none;
}

.cat-nav__link--active {
  color: var(--cat-text);
  background: none;
  border-bottom-color: var(--cat-text);
  font-weight: 500;
}

.cat-nav__spacer {
  flex: 1;
}

.cat-nav__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---------------------------------------------------------------------------
   MAIN LAYOUT
   --------------------------------------------------------------------------- */
.cat-main {
  padding-top: var(--cat-nav-height);
  min-height: 100vh;
}

.cat-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 48px 32px;
}

.cat-container--narrow {
  max-width: 960px;
}

/* ---------------------------------------------------------------------------
   PAGE HEADER
   --------------------------------------------------------------------------- */
.cat-page-header {
  margin-bottom: 48px;
}

.cat-page-header__title {
  font-size: 2rem;
  font-weight: 600;
  color: var(--cat-text);
  margin-bottom: 10px;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.cat-page-header__description {
  font-size: 0.9375rem;
  color: var(--cat-text-secondary);
  max-width: 560px;
  line-height: 1.6;
}

/* ---------------------------------------------------------------------------
   GRID (cat-grid)
   --------------------------------------------------------------------------- */
.cat-grid {
  display: grid;
  gap: 24px;
}

.cat-grid--2 { grid-template-columns: repeat(2, 1fr); }
.cat-grid--3 { grid-template-columns: repeat(3, 1fr); }
.cat-grid--4 { grid-template-columns: repeat(4, 1fr); }
.cat-grid--auto {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

@media (max-width: 768px) {
  .cat-grid--2,
  .cat-grid--3,
  .cat-grid--4 {
    grid-template-columns: 1fr;
  }
}

/* ---------------------------------------------------------------------------
   CARD (cat-card)
   --------------------------------------------------------------------------- */
.cat-card {
  background: var(--cat-surface);
  border: 1px solid var(--cat-border);
  border-radius: var(--cat-radius-lg);
  overflow: hidden;
  transition: border-color var(--cat-transition);
}

.cat-card:hover {
  border-color: var(--cat-text-tertiary);
}

.cat-card--interactive {
  cursor: pointer;
}

.cat-card--interactive:hover {
  border-color: var(--cat-text);
}

.cat-card__media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--cat-bg-secondary);
}

.cat-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity var(--cat-transition);
}

.cat-card__body {
  padding: 20px;
}

.cat-card__title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--cat-text);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.cat-card__subtitle {
  font-size: 0.8125rem;
  color: var(--cat-text-secondary);
  line-height: 1.5;
}

.cat-card__footer {
  padding: 14px 20px;
  border-top: 1px solid var(--cat-border-subtle);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---------------------------------------------------------------------------
   TAGS (cat-tag)
   --------------------------------------------------------------------------- */
.cat-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--cat-text-secondary);
  background: transparent;
  border: 1px solid var(--cat-border);
  border-radius: var(--cat-radius-sm);
  white-space: nowrap;
  transition: all var(--cat-transition);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.cat-tag:hover {
  border-color: var(--cat-text);
  color: var(--cat-text);
  background: transparent;
}

.cat-tag--active {
  background: var(--cat-accent);
  color: var(--cat-accent-text);
  border-color: var(--cat-accent);
}

.cat-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ---------------------------------------------------------------------------
   SEARCH (cat-search)
   --------------------------------------------------------------------------- */
.cat-search {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.cat-search__input {
  width: 100%;
  height: 36px;
  padding: 0 16px 0 36px;
  font-size: 0.8125rem;
  font-family: var(--cat-font);
  color: var(--cat-text);
  background: var(--cat-bg-secondary);
  border: 1px solid var(--cat-border);
  border-radius: var(--cat-radius-sm);
  outline: none;
  transition: all var(--cat-transition);
}

.cat-search__input:focus {
  background: var(--cat-surface);
  border-color: var(--cat-text);
}

.cat-search__input::placeholder {
  color: var(--cat-text-tertiary);
}

.cat-search__icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--cat-text-tertiary);
  pointer-events: none;
}

/* ---------------------------------------------------------------------------
   TOGGLE (cat-toggle — dark mode, view switches)
   --------------------------------------------------------------------------- */
.cat-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.8125rem;
  color: var(--cat-text-secondary);
  user-select: none;
}

.cat-toggle__track {
  width: 36px;
  height: 20px;
  background: var(--cat-border);
  border-radius: 10px;
  position: relative;
  transition: background var(--cat-transition);
}

.cat-toggle__thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  transition: transform var(--cat-transition);
}

.cat-toggle--active .cat-toggle__track {
  background: var(--cat-text);
}

.cat-toggle--active .cat-toggle__thumb {
  transform: translateX(16px);
}

/* ---------------------------------------------------------------------------
   CODE BLOCK (cat-code)
   --------------------------------------------------------------------------- */
.cat-code {
  position: relative;
  background: var(--cat-bg-secondary);
  border: 1px solid var(--cat-border);
  border-radius: var(--cat-radius-sm);
  padding: 20px;
  overflow-x: auto;
}

.cat-code pre {
  font-family: var(--cat-font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--cat-text);
  white-space: pre;
  margin: 0;
}

.cat-code__copy {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 12px;
  font-size: 0.6875rem;
  font-family: var(--cat-font);
  font-weight: 500;
  color: var(--cat-text-secondary);
  background: var(--cat-bg);
  border: 1px solid var(--cat-border);
  border-radius: var(--cat-radius-sm);
  cursor: pointer;
  transition: all var(--cat-transition);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.cat-code__copy:hover {
  color: var(--cat-text);
  border-color: var(--cat-text);
}

/* ---------------------------------------------------------------------------
   TABS (cat-tabs)
   --------------------------------------------------------------------------- */
.cat-tabs {
  display: flex;
  border-bottom: 1px solid var(--cat-border);
  gap: 0;
  margin-bottom: 24px;
}

.cat-tabs__tab {
  padding: 10px 20px;
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--cat-text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--cat-transition);
  font-family: var(--cat-font);
}

.cat-tabs__tab:hover {
  color: var(--cat-text);
}

.cat-tabs__tab--active {
  color: var(--cat-text);
  border-bottom-color: var(--cat-text);
  font-weight: 500;
}

/* ---------------------------------------------------------------------------
   BREADCRUMBS
   --------------------------------------------------------------------------- */
.cat-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--cat-text-tertiary);
  margin-bottom: 16px;
}

.cat-breadcrumb a {
  color: var(--cat-text-secondary);
}

.cat-breadcrumb__sep {
  color: var(--cat-text-tertiary);
}

/* ---------------------------------------------------------------------------
   STAT CARDS (dashboard)
   --------------------------------------------------------------------------- */
.cat-stat {
  padding: 24px;
}

.cat-stat__value {
  font-size: 2.25rem;
  font-weight: 600;
  color: var(--cat-text);
  line-height: 1;
  margin-bottom: 6px;
  letter-spacing: -0.03em;
}

.cat-stat__label {
  font-size: 0.6875rem;
  color: var(--cat-text-tertiary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------------------------------------------------------------------------
   PREVIEW FRAME (renders style components in isolation)
   --------------------------------------------------------------------------- */
.cat-preview {
  background: var(--cat-bg-secondary);
  border: 1px solid var(--cat-border);
  border-radius: var(--cat-radius-md);
  padding: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 16px;
}

.cat-preview--centered {
  justify-content: center;
  align-items: center;
}

.cat-preview--dark {
  background: #1a1a1a;
  border-color: #333;
}

/* Override inline text colors in dark mode for creation previews */
.dark .cat-preview.cal [style*="color:#8C7B6B"],
.dark .cat-preview.cal [style*="color:#3D2E1E"],
.dark .cat-preview.chr [style*="color:#8B7B6B"],
.dark .cat-preview.chr [style*="color:#5C4A3A"],
.dark .cat-preview.chr [style*="color:#1B1612"],
.dark .cat-preview.ast [style*="color:#9B9DAF"],
.dark .cat-preview.ast [style*="color:#12141F"],
.dark .cat-preview.ast [style*="color:#5A5C6E"] {
  color: var(--cat-text-secondary) !important;
}

/* ---------------------------------------------------------------------------
   SECTION DIVIDER
   --------------------------------------------------------------------------- */
.cat-section {
  margin-bottom: 56px;
}

.cat-section__title {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--cat-text-tertiary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--cat-border);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---------------------------------------------------------------------------
   STYLE HERO HEADER
   --------------------------------------------------------------------------- */
.cat-style-hero {
  position: relative;
  margin: -8px -32px 48px;
  padding: 48px 48px 40px;
  border-radius: 0;
  background: var(--cat-bg-secondary);
  border-bottom: 1px solid var(--cat-border);
  overflow: hidden;
}

.cat-style-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--hero-accent, var(--cat-accent));
  opacity: 0.04;
  pointer-events: none;
}

.cat-style-hero__top {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  margin-bottom: 20px;
}

.cat-style-hero__logo {
  flex-shrink: 0;
  min-width: 56px;
  height: 56px;
  border-radius: var(--cat-radius-sm);
  background: var(--cat-surface);
  border: 1px solid var(--cat-border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  overflow: hidden;
}

.cat-style-hero__logo img,
.cat-style-hero__logo svg {
  display: block;
  height: 32px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
}

.cat-dark .cat-style-hero__logo--invert img,
.cat-dark .cat-style-hero__logo--invert svg {
  filter: invert(1);
}

.cat-style-hero__logo--generic {
  background: var(--hero-accent, var(--cat-accent));
  border-color: transparent;
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
}

.cat-style-hero__text {
  flex: 1;
  min-width: 0;
}

.cat-style-hero__title {
  font-size: 2rem;
  font-weight: 600;
  color: var(--cat-text);
  letter-spacing: -0.035em;
  line-height: 1.1;
  margin-bottom: 10px;
}

.cat-style-hero__description {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--cat-text-secondary);
  max-width: 640px;
}

.cat-style-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

.cat-style-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--cat-text-secondary);
  background: var(--cat-surface);
  border: 1px solid var(--cat-border);
  border-radius: var(--cat-radius-sm);
  padding: 5px 12px;
  white-space: nowrap;
}

.cat-style-hero__badge svg {
  width: 14px;
  height: 14px;
  opacity: 0.6;
}

.cat-style-hero__badge--dark {
  background: #1a1a1a;
  color: #e5e5e5;
  border-color: #333;
}

.cat-style-hero__badge--source {
  text-decoration: none;
  transition: border-color var(--cat-transition), color var(--cat-transition);
}

.cat-style-hero__badge--source:hover {
  border-color: var(--cat-accent);
  color: var(--cat-accent);
  text-decoration: none;
}

.cat-style-hero__colors {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.cat-style-hero__swatch {
  width: 24px;
  height: 24px;
  border-radius: var(--cat-radius-sm);
  border: 1px solid var(--cat-border);
  transition: transform 0.15s ease;
}

.cat-style-hero__swatch:hover {
  transform: scale(1.15);
}

/* Section cards variant */
.cat-section--card {
  background: var(--cat-bg-secondary);
  border: 1px solid var(--cat-border);
  border-radius: var(--cat-radius-lg);
  padding: 28px 32px 32px;
}

.cat-section--card .cat-section__title {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 8px;
}

.cat-section__subtitle {
  font-size: 0.875rem;
  color: var(--cat-text-tertiary);
  margin-bottom: 20px;
}

.cat-section__header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--cat-border-subtle);
}

.cat-section__header .cat-section__title {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.cat-section__count {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--cat-text-tertiary);
  background: var(--cat-bg-tertiary);
  border-radius: 999px;
  padding: 2px 10px;
}

/* Style nav (prev/next) */
.cat-style-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--cat-border);
}

.cat-style-nav__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-decoration: none;
  padding: 12px 0;
  border-radius: 0;
  transition: color var(--cat-transition);
  max-width: 45%;
}

.cat-style-nav__link:hover {
  text-decoration: none;
}

.cat-style-nav__link--next {
  align-items: flex-end;
  text-align: right;
  margin-left: auto;
}

.cat-style-nav__label {
  font-size: 0.6875rem;
  color: var(--cat-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.cat-style-nav__name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--cat-text);
}

@media (max-width: 768px) {
  .cat-style-hero {
    margin: -8px -16px 36px;
    padding: 28px 20px 24px;
  }

  .cat-style-hero__top {
    flex-direction: column;
    gap: 16px;
  }

  .cat-style-hero__title {
    font-size: 1.5rem;
  }

  .cat-style-hero__meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .cat-style-hero__colors {
    margin-left: 0;
  }

  .cat-section--card {
    padding: 16px;
  }

  .cat-container {
    padding: 32px 16px;
  }
}

/* ---------------------------------------------------------------------------
   FILTER BAR (styles page)
   --------------------------------------------------------------------------- */
.cat-filter-bar {
  margin-bottom: 32px;
}

.cat-filter-bar__row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.cat-filter-bar__row + .cat-filter-bar__row {
  margin-top: 12px;
}

.cat-filter-bar__group {
  display: flex;
  gap: 4px;
}

.cat-filter-bar__search {
  margin-left: auto;
}

.cat-filter-bar__input {
  height: 32px;
  padding: 0 12px;
  font-size: 0.8125rem;
  font-family: var(--cat-font);
  color: var(--cat-text);
  background: var(--cat-surface);
  border: 1px solid var(--cat-border);
  border-radius: var(--cat-radius-sm);
  outline: none;
  width: 200px;
  transition: border-color var(--cat-transition);
}

.cat-filter-bar__input:focus {
  border-color: var(--cat-text);
}

.cat-filter-bar__input::placeholder {
  color: var(--cat-text-tertiary);
}

.cat-filter-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: var(--cat-font);
  color: var(--cat-text-secondary);
  background: none;
  border: 1px solid var(--cat-border);
  border-radius: var(--cat-radius-sm);
  cursor: pointer;
  transition: all var(--cat-transition);
  white-space: nowrap;
}

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

.cat-filter-pill--active {
  background: var(--cat-text);
  color: var(--cat-bg);
  border-color: var(--cat-text);
}

.cat-filter-pill--sm {
  padding: 4px 10px;
  font-size: 0.75rem;
}

.cat-filter-pill__count {
  font-size: 0.6875rem;
  opacity: 0.6;
}

.cat-filter-bar__sectors {
  transition: opacity var(--cat-transition);
}

.cat-results-count {
  font-size: 0.75rem;
  color: var(--cat-text-tertiary);
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Style group headers */
.cat-style-group {
  margin-bottom: 48px;
}

.cat-style-group__header {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--cat-border);
}

.cat-style-group__title {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--cat-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.cat-style-group__count {
  font-size: 0.6875rem;
  color: var(--cat-text-tertiary);
}

@media (max-width: 768px) {
  .cat-filter-bar__row {
    flex-direction: column;
    align-items: stretch;
  }

  .cat-filter-bar__search {
    margin-left: 0;
  }

  .cat-filter-bar__input {
    width: 100%;
  }

  .cat-filter-bar__group {
    flex-wrap: wrap;
  }

  .cat-filter-bar__sectors {
    overflow-x: auto;
    flex-wrap: nowrap;
  }
}

/* ---------------------------------------------------------------------------
   EMPTY STATE
   --------------------------------------------------------------------------- */
.cat-empty {
  text-align: center;
  padding: 64px 24px;
  color: var(--cat-text-tertiary);
}

.cat-empty__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--cat-text-secondary);
  margin-bottom: 8px;
}

/* ---------------------------------------------------------------------------
   UTILITIES
   --------------------------------------------------------------------------- */
.cat-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.cat-flex { display: flex; }
.cat-flex-col { display: flex; flex-direction: column; }
.cat-items-center { align-items: center; }
.cat-justify-between { justify-content: space-between; }
.cat-gap-sm { gap: 8px; }
.cat-gap-md { gap: 16px; }
.cat-gap-lg { gap: 24px; }
.cat-mt-sm { margin-top: 8px; }
.cat-mt-md { margin-top: 16px; }
.cat-mt-lg { margin-top: 24px; }
.cat-mb-sm { margin-bottom: 8px; }
.cat-mb-md { margin-bottom: 16px; }
.cat-mb-lg { margin-bottom: 24px; }

/* ---------------------------------------------------------------------------
   UI SYSTEM SHELL (ui-system.html)
   --------------------------------------------------------------------------- */

/* Full-viewport two-col layout below the fixed nav */
.cat-system-layout {
  display: flex;
  min-height: calc(100vh - var(--cat-nav-height));
}

/* Left sidebar — sticky, scrolls independently */
.cat-system-sidebar {
  width: 220px;
  flex-shrink: 0;
  position: sticky;
  top: var(--cat-nav-height);
  height: calc(100vh - var(--cat-nav-height));
  overflow-y: auto;
  background: var(--cat-surface);
  border-right: 1px solid var(--cat-border);
  display: flex;
  flex-direction: column;
}

.cat-system-sidebar__header {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--cat-border);
  flex-shrink: 0;
}

.cat-system-sidebar__back {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  color: var(--cat-text-tertiary);
  text-decoration: none;
  margin-bottom: 14px;
  transition: color var(--cat-transition);
}

.cat-system-sidebar__back:hover {
  color: var(--cat-text-secondary);
  text-decoration: none;
}

.cat-system-sidebar__name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--cat-text);
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 4px;
}

.cat-system-sidebar__type {
  font-size: 0.6875rem;
  color: var(--cat-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.cat-system-sidebar__nav {
  padding: 12px 10px;
  flex: 1;
}

.cat-system-sidebar__link {
  display: flex;
  align-items: center;
  padding: 8px 10px;
  font-size: 0.8125rem;
  color: var(--cat-text-secondary);
  text-decoration: none;
  border-radius: var(--cat-radius-sm);
  transition: all var(--cat-transition);
  white-space: nowrap;
}

.cat-system-sidebar__link:hover {
  color: var(--cat-text);
  background: var(--cat-bg-secondary);
  text-decoration: none;
}

.cat-system-sidebar__link--active {
  color: var(--cat-text);
  background: var(--cat-bg-secondary);
  font-weight: 500;
}

/* Submenu parent — collapsible section */
.cat-system-sidebar__group {
  display: flex;
  flex-direction: column;
}

.cat-system-sidebar__parent {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  font-size: 0.8125rem;
  color: var(--cat-text-secondary);
  cursor: pointer;
  border-radius: var(--cat-radius-sm);
  transition: all var(--cat-transition);
  user-select: none;
}

.cat-system-sidebar__parent:hover {
  color: var(--cat-text);
  background: var(--cat-bg-secondary);
}

.cat-system-sidebar__parent--active {
  color: var(--cat-text);
  font-weight: 500;
}

.cat-system-sidebar__chevron {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 200ms ease;
  opacity: 0.5;
}

.cat-system-sidebar__group--open > .cat-system-sidebar__parent .cat-system-sidebar__chevron {
  transform: rotate(90deg);
}

.cat-system-sidebar__children {
  display: none;
  flex-direction: column;
  padding-left: 12px;
}

.cat-system-sidebar__group--open > .cat-system-sidebar__children {
  display: flex;
}

.cat-system-sidebar__children .cat-system-sidebar__link {
  font-size: 0.75rem;
  padding: 5px 10px;
  color: var(--cat-text-tertiary);
}

.cat-system-sidebar__children .cat-system-sidebar__link:hover {
  color: var(--cat-text-secondary);
}

.cat-system-sidebar__children .cat-system-sidebar__link--active {
  color: var(--cat-text);
  font-weight: 500;
}

/* Export button */
#export-llm-btn:hover {
  color: var(--cat-text);
  border-color: var(--cat-text-tertiary);
  background: var(--cat-bg-tertiary);
}

/* Right content area — fills remaining space */
.cat-system-content {
  flex: 1;
  min-width: 0;
  padding: 48px 56px;
}

/* Wrapper for injected free-form HTML */
.cat-system-frame {
  /* intentionally unstyled — systems author their own look */
}

/* Status badge variants */
.cat-system-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  font-size: 0.6875rem;
  font-weight: 500;
  border-radius: var(--cat-radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.cat-system-badge--original {
  background: #eef2ff;
  color: #4338ca;
}

.cat-system-badge--replicated {
  background: var(--cat-bg-secondary);
  color: var(--cat-text-secondary);
  border: 1px solid var(--cat-border);
}

.cat-system-badge--complete {
  background: #f0fdf4;
  color: #166534;
}

.cat-system-badge--in-progress {
  background: #fffbeb;
  color: #92400e;
}

.cat-dark .cat-system-badge--original {
  background: #1e1b4b;
  color: #a5b4fc;
}

.cat-dark .cat-system-badge--complete {
  background: #052e16;
  color: #86efac;
}

.cat-dark .cat-system-badge--in-progress {
  background: #1c1004;
  color: #fcd34d;
}

@media (max-width: 768px) {
  .cat-system-layout {
    flex-direction: column;
  }

  .cat-system-sidebar {
    width: 100%;
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--cat-border);
  }

  .cat-system-sidebar__nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 10px;
  }

  .cat-system-content {
    padding: 24px 16px;
  }
}