/* Page specific customizations for books.html */
.books-hero {
  background:
    radial-gradient(ellipse at 10% 40%, var(--color-primary-muted) 0%, transparent 60%),
    radial-gradient(ellipse at 90% 10%, var(--color-secondary-muted) 0%, transparent 50%),
    var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-10) 0;
}

.selector-scroll-container {
  overflow-x: auto;
  scrollbar-width: none; /* Firefox */
  -webkit-overflow-scrolling: touch;
  display: flex;
  gap: var(--space-3);
  padding: var(--space-2) var(--container-padding-x);
}

.selector-scroll-container::-webkit-scrollbar {
  display: none; /* Safari and Chrome */
}

.category-btn-card {
  min-width: 140px;
  flex: 0 0 auto;
  text-align: center;
  padding: var(--space-4);
  border-radius: var(--radius-xl);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  user-select: none;
}

.category-btn-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.category-btn-card.active {
  background-color: var(--color-primary-muted);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.category-btn-card.active .cat-icon-wrapper {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
}

.cat-icon-wrapper {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background-color: var(--color-surface-400);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-md);
  color: var(--color-text-secondary);
  transition: var(--transition-base);
}

.section-title-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  border-bottom: 2px solid var(--color-primary-muted);
  padding-bottom: var(--space-3);
}

.section-icon-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.section-icon-badge {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-lg);
  background-color: var(--color-primary-muted);
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cat-title-pill {
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

/* Category Accent Color Classes mapping to design system tokens */
.cat-tag-1 { background-color: color-mix(in srgb, var(--color-sem-1) 20%, white); color: color-mix(in srgb, var(--color-sem-1) 80%, black); }
.cat-tag-2 { background-color: color-mix(in srgb, var(--color-sem-2) 20%, white); color: color-mix(in srgb, var(--color-sem-2) 80%, black); }
.cat-tag-3 { background-color: color-mix(in srgb, var(--color-sem-3) 20%, white); color: color-mix(in srgb, var(--color-sem-3) 80%, black); }
.cat-tag-4 { background-color: color-mix(in srgb, var(--color-sem-4) 20%, white); color: color-mix(in srgb, var(--color-sem-4) 80%, black); }
.cat-tag-5 { background-color: color-mix(in srgb, var(--color-sem-5) 20%, white); color: color-mix(in srgb, var(--color-sem-5) 80%, black); }
.cat-tag-6 { background-color: color-mix(in srgb, var(--color-sem-6) 20%, white); color: color-mix(in srgb, var(--color-sem-6) 80%, black); }
.cat-tag-7 { background-color: color-mix(in srgb, var(--color-sem-7) 20%, white); color: color-mix(in srgb, var(--color-sem-7) 80%, black); }
.cat-tag-8 { background-color: color-mix(in srgb, var(--color-sem-8) 20%, white); color: color-mix(in srgb, var(--color-sem-8) 80%, black); }
.cat-tag-9 { background-color: color-mix(in srgb, var(--color-sem-1) 20%, white); color: color-mix(in srgb, var(--color-sem-1) 80%, black); }
.cat-tag-10 { background-color: color-mix(in srgb, var(--color-sem-2) 20%, white); color: color-mix(in srgb, var(--color-sem-2) 80%, black); }
.cat-tag-11 { background-color: color-mix(in srgb, var(--color-sem-3) 20%, white); color: color-mix(in srgb, var(--color-sem-3) 80%, black); }
.cat-tag-12 { background-color: color-mix(in srgb, var(--color-sem-4) 20%, white); color: color-mix(in srgb, var(--color-sem-4) 80%, black); }

/* Transition states for content container */
.fade-content {
  transition: opacity var(--duration-normal) var(--ease-out), transform var(--duration-normal) var(--ease-out);
  opacity: 1;
  transform: translateY(0);
}

.fade-content.is-loading {
  opacity: 0;
  transform: translateY(8px);
}

/* Grid layout adjustments */
.sections-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}