/* ============================================================================
   Collections Panel — Sidebar folders + card grid for saved/favorite items.
   Uses dashboard design tokens. Dark-first, light override via [data-theme].
   All values in rem (ZERO px).
   ============================================================================ */

/* --- Layout --- */
.cp-wrapper {
  display: flex;
  height: 100%;
  overflow: hidden;
  position: relative;
}

/* --- Sidebar --- */
.cp-sidebar {
  width: 14rem;
  min-width: 14rem;
  border-right: 0.0625rem solid var(--dash-border);
  background: var(--dash-bg-secondary);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 0.75rem 0;
}

.cp-sidebar-heading {
  font-family: var(--dash-font-display, 'Syne', sans-serif);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dash-text-muted);
  padding: 0.5rem 1rem 0.375rem;
}

/* --- Folders --- */
.cp-folder {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  color: var(--dash-text-secondary);
  font-size: 0.8125rem;
  font-family: inherit;
  border-left: 0.1875rem solid transparent;
  transition: background var(--transition-fast, 0.15s ease),
              color var(--transition-fast, 0.15s ease),
              border-color var(--transition-fast, 0.15s ease);
}

.cp-folder:hover {
  background: var(--dash-bg-hover);
  color: var(--dash-text-primary, #f1f5f9);
}

.cp-folder.active {
  border-left-color: var(--dash-accent, #6366f1);
  color: var(--dash-accent, #6366f1);
  background: var(--dash-accent-glow, rgba(99, 102, 241, 0.12));
}

.cp-folder-icon {
  width: 1.125rem;
  text-align: center;
  font-size: 0.8125rem;
  flex-shrink: 0;
}

.cp-folder-label {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cp-folder-count {
  font-size: 0.6875rem;
  min-width: 1.25rem;
  height: 1.25rem;
  line-height: 1.25rem;
  text-align: center;
  border-radius: 624.9375rem;
  background: var(--dash-bg-elevated, #1f2a40);
  color: var(--dash-text-secondary);
  font-weight: 600;
  flex-shrink: 0;
}

.cp-folder.active .cp-folder-count {
  background: var(--dash-accent, #6366f1);
  color: #fff;
}

/* --- Main content area --- */
.cp-main {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* --- Section divider --- */
.cp-section-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--dash-font-display, 'Syne', sans-serif);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--dash-text-muted);
  margin-top: 0.5rem;
}

.cp-section-divider::after {
  content: '';
  flex: 1;
  height: 0.0625rem;
  background: var(--dash-border);
}

/* --- Card grid --- */
.cp-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
  gap: 1rem;
}

/* --- Cards --- */
.cp-card {
  background: var(--dash-bg-secondary);
  border: 0.0625rem solid var(--dash-border);
  border-radius: var(--radius-md, 0.5rem);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-fast, 0.15s ease),
              box-shadow var(--transition-fast, 0.15s ease),
              border-color var(--transition-fast, 0.15s ease);
}

.cp-card:hover {
  transform: translateY(-0.0625rem);
  box-shadow: var(--shadow-md, 0 0.25rem 0.75rem rgba(0, 0, 0, 0.4));
  border-color: var(--dash-border-hover, rgba(255, 255, 255, 0.12));
}

.cp-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 0.0625rem solid var(--dash-border);
}

.cp-card-name {
  font-family: var(--dash-font-display, 'Syne', sans-serif);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--dash-text-primary, #f1f5f9);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  margin-right: 0.5rem;
}

/* --- Card actions --- */
.cp-card-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-shrink: 0;
}

.cp-card-actions button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-sm, 0.375rem);
  border: none;
  background: none;
  color: var(--dash-text-muted);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: color var(--transition-fast, 0.15s ease),
              background var(--transition-fast, 0.15s ease);
}

.cp-card-actions button:hover {
  background: var(--dash-bg-hover);
  color: var(--dash-text-primary, #f1f5f9);
}

.cp-card-actions button.cp-action-heart.active {
  color: var(--dash-rose, #f43f5e);
}

.cp-card-actions button.cp-action-bookmark.active {
  color: var(--dash-accent, #6366f1);
}

.cp-card-actions button.cp-action-share:hover {
  color: var(--dash-accent, #6366f1);
}

/* --- Card body --- */
.cp-card-body {
  padding: 0.75rem 1rem 1rem;
  font-size: 0.8125rem;
  color: var(--dash-text-secondary);
  line-height: 1.5;
}

/* --- Empty state --- */
.cp-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
  flex: 1;
}

.cp-empty-icon {
  font-size: 2.5rem;
  color: var(--dash-text-muted);
  margin-bottom: 1rem;
}

.cp-empty-title {
  font-family: var(--dash-font-display, 'Syne', sans-serif);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--dash-text-primary, #f1f5f9);
  margin-bottom: 0.5rem;
}

.cp-empty-text {
  font-size: 0.875rem;
  color: var(--dash-text-secondary);
  max-width: 22rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.cp-empty-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.cp-empty-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  color: var(--dash-accent, #6366f1);
  background: var(--dash-accent-glow, rgba(99, 102, 241, 0.12));
  border-radius: 624.9375rem;
  text-decoration: none;
  font-weight: 500;
  transition: background var(--transition-fast, 0.15s ease);
}

.cp-empty-link:hover {
  background: var(--dash-bg-hover);
}

/* --- Mobile toggle --- */
.cp-mobile-toggle {
  display: none;
  position: fixed;
  bottom: 1.25rem;
  left: 1.25rem;
  z-index: 200;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: none;
  background: var(--dash-accent, #6366f1);
  color: #fff;
  font-size: 1.125rem;
  cursor: pointer;
  box-shadow: var(--shadow-md, 0 0.25rem 0.75rem rgba(0, 0, 0, 0.4));
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast, 0.15s ease);
}

.cp-mobile-toggle:hover {
  transform: scale(1.08);
}

/* --- Mobile overlay --- */
.cp-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 149;
  background: rgba(0, 0, 0, 0.5);
}

/* --- Light theme adjustments --- */
[data-theme="light"] .cp-card {
  background: var(--dash-bg-secondary);
}

[data-theme="light"] .cp-folder-count {
  background: var(--dash-bg-elevated);
}

[data-theme="light"] .cp-overlay {
  background: rgba(0, 0, 0, 0.25);
}

/* --- Mobile --- */
@media (max-width: 48rem) {
  .cp-mobile-toggle {
    display: flex;
  }

  .cp-sidebar {
    position: fixed;
    top: var(--dash-header-h, 3.75rem);
    left: 0;
    bottom: 0;
    z-index: 150;
    transform: translateX(-100%);
    transition: transform var(--transition-smooth, 0.35s cubic-bezier(0.4, 0, 0.2, 1));
    box-shadow: none;
  }

  .cp-sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg, 0 0.5rem 1.5rem rgba(0, 0, 0, 0.5));
  }

  .cp-overlay.visible {
    display: block;
  }

  .cp-main {
    padding: 1rem;
  }

  .cp-card-grid {
    grid-template-columns: 1fr;
  }
}