/* ============================================
   Catalog browsing styles — catalog#index, catalog#show
   Mobile-first, single breakpoint at 600px.
   Uses design tokens from application.css :root.
   ============================================ */

/* ============================================
   Layout
   ============================================ */
.catalog-main {
  padding: var(--spacing-xl) 0 var(--spacing-3xl);
}

.catalog-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ============================================
   Page header
   ============================================ */
.catalog-header {
  margin-bottom: var(--spacing-2xl);
}

.catalog-headline {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent);
  margin: 0 0 var(--spacing-md);
  line-height: 1.3;
}

.catalog-intro {
  max-width: 40rem;
}

.catalog-sub {
  font-size: 1.0625rem;
  color: var(--color-muted);
  margin: 0 0 var(--spacing-sm);
  line-height: 1.6;
}

.catalog-sub:last-child {
  margin-bottom: 0;
}

/* ============================================
   Empty state
   ============================================ */
.catalog-empty {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-2xl);
  text-align: center;
}

.catalog-empty p {
  font-size: 1rem;
  color: var(--color-muted);
  margin: 0;
}

/* ============================================
   Pillar section
   ============================================ */
.catalog-pillar {
  margin-bottom: var(--spacing-2xl);
}

.catalog-pillar:last-child {
  margin-bottom: 0;
}

.pillar-heading {
  margin-bottom: var(--spacing-lg);
}

.pillar-badge {
  display: inline-block;
  padding: 0.125rem 0.625rem;
  font-size: 0.6875rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
}

.pillar-title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  margin: var(--spacing-xs) 0;
}

.pillar-desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin: 0;
  line-height: 1.6;
  max-width: 36rem;
}

/* ============================================
   Card grid
   ============================================ */
.catalog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

/* ============================================
   Catalog card wrapper + card
   ============================================ */
.catalog-card-wrapper {
  display: flex;
  flex-direction: column;
}

.catalog-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius) var(--radius) 0 0;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 200ms ease, border-color 200ms ease, transform 200ms ease;
  flex: 1;
}

/* Card without App Store link — full border-radius */
.catalog-card-wrapper:not(:has(.catalog-app-store-link)) .catalog-card {
  border-radius: var(--radius);
}

.catalog-card:hover {
  border-color: var(--color-gold);
  box-shadow: 0 4px 24px rgba(27, 42, 74, 0.08);
  transform: translateY(-2px);
  color: inherit;
}

.catalog-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius);
}

/* Card image */
.catalog-card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-accent-light);
}

.catalog-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Card placeholder (no image) */
.catalog-card-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.catalog-card-placeholder svg {
  width: 3rem;
  height: 3rem;
  opacity: 0.4;
}

/* Card body */
.catalog-card-body {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.catalog-card-title {
  font-size: 1.0625rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  margin: 0 0 var(--spacing-xs);
  line-height: 1.3;
}

.catalog-card-desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin: 0 0 var(--spacing-sm);
  line-height: 1.6;
  flex: 1;
}

/* Technology tags */
.catalog-card-tech,
.catalog-detail-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.tech-tag {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.02em;
  color: var(--color-gold);
  background: var(--color-gold-light);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

/* ============================================
   App Store link — index cards
   ============================================ */
.catalog-app-store-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-accent);
  color: var(--color-surface);
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: 0 0 var(--radius) var(--radius);
  border: 1px solid var(--color-accent);
  border-top: none;
  transition: background 200ms ease;
}

.catalog-app-store-link:hover {
  background: var(--color-accent-hover);
  color: var(--color-surface);
}

.catalog-app-store-link:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.app-store-icon {
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
}

/* ============================================
   App Store link — detail page
   ============================================ */
.catalog-detail-app-store-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-accent);
  color: var(--color-surface);
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background 200ms ease;
}

.catalog-detail-app-store-link:hover {
  background: var(--color-accent-hover);
  color: var(--color-surface);
}

.catalog-detail-app-store-link:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.catalog-detail-app-store-link .app-store-icon {
  width: 1rem;
  height: 1rem;
}

/* ============================================
   Breadcrumb
   ============================================ */
.catalog-breadcrumb {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: var(--spacing-lg);
}

.catalog-breadcrumb a {
  color: var(--color-gold);
  font-weight: var(--font-weight-medium);
}

.catalog-breadcrumb a:hover {
  color: var(--color-gold-hover);
}

.catalog-breadcrumb span[aria-current] {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

/* ============================================
   Detail view
   ============================================ */
.catalog-detail {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.catalog-detail-header {
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-md);
}

.catalog-detail-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent);
  margin: var(--spacing-sm) 0 0;
  line-height: 1.3;
}

/* Gallery */
.catalog-detail-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  padding: 0 var(--spacing-xl);
}

.gallery-item {
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-accent-light);
}

.gallery-item img {
  width: 100%;
  display: block;
}

/* Body — description + sidebar */
.catalog-detail-body {
  padding: var(--spacing-xl);
}

.catalog-detail-description {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.7;
}

.catalog-detail-description p {
  margin: 0 0 var(--spacing-md);
}

.catalog-detail-description p:last-child {
  margin-bottom: 0;
}

/* Sidebar */
.catalog-detail-sidebar {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.catalog-detail-sidebar-section {
  margin-bottom: var(--spacing-xl);
}

.catalog-detail-sidebar-section:last-child {
  margin-bottom: 0;
}

.sidebar-heading {
  font-size: 0.875rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 var(--spacing-sm);
}

/* Footer */
.catalog-detail-footer {
  padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

/* ============================================
   Desktop breakpoint (600px+)
   ============================================ */
@media (min-width: 600px) {
  .catalog-headline {
    font-size: 2rem;
  }

  .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }

  .pillar-title {
    font-size: 1.5rem;
  }

  .catalog-detail-title {
    font-size: 1.75rem;
  }

  .catalog-detail-gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .catalog-detail-body {
    display: grid;
    grid-template-columns: 1fr 14rem;
    gap: var(--spacing-2xl);
  }

  .catalog-detail-sidebar {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    border-left: 1px solid var(--color-border);
    padding-left: var(--spacing-xl);
  }
}

/* ============================================
   Reduced motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  .catalog-card,
  .catalog-app-store-link,
  .catalog-detail-app-store-link {
    transition-duration: 0s;
  }
}