/**
 * Backlist and Out of Print section styles.
 *
 * @package CSRC
 */

/* ============================================
   Component-specific custom properties
   ============================================ */

.csrc-combined-publications {
    /* UCLA Brand Colors */
    --color-ucla-blue-light: #5091cd;
    --color-ucla-blue-dark: #1e5a8a;
    --color-ucla-gold-light: #ffe555;

    /* Neutral Color Palette */
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #eeeeee;
    --color-gray-300: #e0e0e0;
    --color-gray-400: #bdbdbd;

    /* Semantic Colors */
    --color-surface: #ffffff;
    --color-surface-light: #fafafa;
    --color-divider: var(--color-gray-200);
    --color-text-tertiary: #000;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 2px 12px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.02);

    /* Border Radius */
    --radius-md: 0.25rem;
    --radius-lg: 0.375rem;
    --radius-xl: 0.5rem;
    --radius-2xl: 0.75rem;

    /* Transitions */
    --transition-base: 200ms ease-out;
    --transition-fast: 150ms ease-out;
    --transition-slow: 300ms ease-out;

    /* Font */
    --font-family-mono: 'Courier New', monospace;

    /* Component-scoped typography (matches old inline scale) */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.75rem;
    --font-size-4xl: 2rem;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.25;
    --line-height-base: 1.5;
    --line-height-relaxed: 1.75;

    /* Component-scoped spacing (matches old inline scale) */
    --c-space-xs: 0.25rem;
    --c-space-sm: 0.5rem;
    --c-space-md: 1rem;
    --c-space-lg: 1.5rem;
    --c-space-xl: 2rem;
    --c-space-2xl: 3rem;
    --c-space-3xl: 4rem;
}

/* WordPress Site-Specific Container Styling */
.csrc-combined-publications {
    width: 100%;
    margin: 0;
    padding: 0;
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    box-sizing: border-box;
    position: relative;
    background: var(--color-background);
}

.csrc-combined-publications * {
    box-sizing: border-box;
}

/* Container matching the site's container system */
.csrc-combined-publications__content {
    width: var(--container-width);
    padding: 4rem 0 80px;
    margin: 0 auto var(--c-space-3xl);
    font-family: var(--font-family-primary);
}

/* ============================================
   PRIMARY TAB NAVIGATION COMPONENT
   ============================================ */

.csrc-primary-tab-container {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    margin: 0 0 var(--c-space-2xl);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.8);
}

.csrc-primary-tab-navigation {
    display: flex;
    gap: 0;
    justify-content: space-between;
    align-items: center;
    padding: var(--c-space-lg) 0;
}

.csrc-primary-tabs-group {
    display: flex;
    gap: 0;
    align-items: center;
}

.csrc-secondary-tabs-group {
    display: flex;
    align-items: center;
}

.csrc-primary-tab-button {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    letter-spacing: -0.01em;
    padding: var(--c-space-md) var(--c-space-xl);
    border-radius: 0;
    transition: all var(--transition-base);
    position: relative;
    cursor: pointer;
    border: none;
    background: transparent;
    white-space: nowrap;
    border-bottom: 2px solid transparent;
}

.csrc-primary-tab-button:hover {
    color: var(--color-text-primary);
    border-bottom-color: var(--color-ucla-blue);
}

.csrc-primary-tab-button.active {
    color: var(--color-ucla-blue);
    border-bottom-color: var(--color-ucla-blue);
    font-weight: var(--font-weight-semibold);
}

button.csrc-primary-tab-button:not([disabled]):focus,
button.csrc-primary-tab-button:focus {
    outline: none;
    outline-offset: 0;
    box-shadow: none;
}

button.csrc-primary-tab-button:not([disabled]):focus-visible,
button.csrc-primary-tab-button:focus-visible {
    outline: 2px solid var(--color-ucla-blue);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ============================================
   SECONDARY TAB NAVIGATION COMPONENT
   ============================================ */

.csrc-secondary-tab-navigation {
    display: inline-flex;
    gap: 2px;
    justify-content: flex-start;
    align-items: center;
    background: #eef0f3;
    border: 1px solid #d9dce1;
    border-radius: var(--radius-lg);
    padding: 4px;
}

.csrc-secondary-tab-button {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    letter-spacing: -0.01em;
    padding: var(--c-space-sm) var(--c-space-xl);
    border-radius: calc(var(--radius-lg) - 2px);
    transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
    position: relative;
    cursor: pointer;
    border: none;
    background: transparent;
    text-align: center;
    white-space: nowrap;
}

.csrc-secondary-tab-button:hover {
    color: var(--color-text-primary);
    background-color: rgba(255, 255, 255, 0.7);
}

.csrc-secondary-tab-button.active {
    background-color: var(--color-white);
    color: var(--color-ucla-blue);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
    font-weight: var(--font-weight-semibold);
}

button.csrc-secondary-tab-button:not([disabled]):focus,
button.csrc-secondary-tab-button:focus {
    outline: none;
    outline-offset: 0;
}

button.csrc-secondary-tab-button:not([disabled]):focus-visible,
button.csrc-secondary-tab-button:focus-visible {
    outline: 2px solid var(--color-ucla-blue);
    outline-offset: 2px;
    border-radius: var(--radius-md);
}

.csrc-tab-separator {
    display: none;
}

/* ============================================
   TAB CONTENT SECTIONS
   ============================================ */

.csrc-primary-tab-content {
    position: relative;
}

.csrc-primary-tab-panel {
    display: none;
}

.csrc-primary-tab-panel.active {
    display: block;
    opacity: 0;
    animation: csrcFadeInUp 0.3s ease-out forwards;
}

.csrc-secondary-tab-content {
    position: relative;
}

.csrc-secondary-tab-panel {
    display: none;
}

.csrc-secondary-tab-panel.active {
    display: block;
    opacity: 0;
    animation: csrcFadeInUp 0.2s ease-out forwards;
}

/* ============================================
   CSRC TITLE BLOCK COMPONENT
   ============================================ */

.csrc-title-block {
    position: relative;
    padding-left: var(--c-space-lg);
    margin-bottom: var(--c-space-2xl);
}

.csrc-title-block::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background-color: var(--color-ucla-gold);
    border-radius: 2px;
}

.csrc-subtitle {
    color: var(--color-ucla-blue) !important;
    font-weight: 500 !important;
    text-transform: uppercase !important;
    font-size: 18px !important;
    letter-spacing: 1px !important;
    margin-bottom: 8px !important;
}

.csrc-subtitle-link {
    color: var(--color-ucla-blue) !important;
    text-decoration: none !important;
    transition: color 0.2s ease !important;
}

.csrc-subtitle-link:hover {
    color: var(--color-orange) !important;
}

.csrc-subtitle-link:focus {
    outline: 2px solid var(--color-ucla-blue);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.csrc-page-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    line-height: var(--line-height-tight);
    margin: 0;
    letter-spacing: -0.025em;
}

.csrc-section-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-semibold);
    margin: 0 0 var(--c-space-xl);
    color: var(--color-text-primary);
    position: relative;
    padding-left: var(--c-space-lg);
}

.csrc-section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background-color: var(--color-ucla-gold);
    border-radius: 2px;
}

/* ============================================
   BOOK ARCHIVE CARD - NON-INTERACTIVE LAYOUT
   ============================================ */

.book-archive-card {
    background: var(--color-surface);
    padding: var(--c-space-2xl) 0;
    margin-bottom: var(--c-space-2xl);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    gap: var(--c-space-2xl);
    position: relative;
    transition: all var(--transition-base);
}

.book-cover-column {
    flex-shrink: 0;
    width: 160px;
}

.book-cover-placeholder {
    width: 100%;
    height: 220px;
    background-color: var(--color-surface-light);
    border: 1px solid var(--color-border);
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

/* Center loading text */
.book-cover-placeholder > div {
    text-align: center;
    padding: var(--c-space-md);
}

.book-cover-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* Loading placeholder for lazy loaded images */
.book-cover-placeholder[data-image-src],
.book-cover-loading {
    background-color: var(--color-gray-100);
}

.book-cover-placeholder[data-loading="true"],
.book-cover-loading {
    background: linear-gradient(90deg,
        var(--color-gray-100) 0%,
        var(--color-gray-50) 50%,
        var(--color-gray-100) 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

/* Ensure smooth transition when image loads */
.book-cover-placeholder img {
    opacity: 0;
    animation: fadeIn 0.3s ease-out forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.book-info-column {
    flex: 1;
    min-width: 0;
}

.book-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin: 0 0 var(--c-space-sm);
    line-height: var(--line-height-tight);
    font-style: italic;
}

.book-authors {
    font-size: var(--font-size-base);
    color: #000;
    margin: 0 0 var(--c-space-md);
}

.book-metadata {
    display: flex;
    flex-wrap: wrap;
    gap: var(--c-space-lg);
    margin-bottom: var(--c-space-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.metadata-item {
    display: flex;
    align-items: center;
    gap: var(--c-space-xs);
    font-weight: var(--font-weight-medium);
}

.metadata-separator {
    color: var(--color-gray-400);
}

.book-description {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
    margin-bottom: var(--c-space-md);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* Hide empty descriptions */
.book-description:empty {
    display: none;
}

.book-description > *:first-child {
    margin-top: 0;
}

.book-description > *:last-child {
    margin-bottom: 0;
}

.book-description p {
    margin-bottom: var(--c-space-md);
}

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

.book-description .wp-block-spacer {
    display: none !important;
}

.book-description * {
    max-width: 100%;
}

.book-notice {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--c-space-md);
    padding-top: var(--c-space-md);
    border-top: 1px solid var(--color-border);
}

.book-notice a {
    color: var(--color-ucla-blue);
    text-decoration: underline;
}

.book-notice a:hover {
    color: var(--color-ucla-blue-dark);
}

.book-isbn {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    font-family: var(--font-family-primary);
}

.book-price {
    font-size: var(--font-size-sm);
    color: var(--color-ucla-blue);
    font-weight: var(--font-weight-semibold);
    background: rgba(39, 116, 174, 0.08);
    padding: var(--c-space-xs) var(--c-space-md);
    border-radius: var(--radius-xl);
    display: inline-block;
}

.book-download-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--c-space-xs);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-ucla-blue);
    background: rgba(39, 116, 174, 0.08);
    border: 1px solid rgba(39, 116, 174, 0.2);
    padding: var(--c-space-sm) var(--c-space-lg);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.book-download-btn:hover {
    background: var(--color-ucla-blue);
    color: var(--color-white);
    border-color: var(--color-ucla-blue);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.book-download-btn:active {
    transform: translateY(0);
}

.download-icon {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.flex-row {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--c-space-xl);
}

.flex-row .book-metadata {
    margin-bottom: 0;
    flex: 1;
}

/* ============================================
   ARCHIVE LIST FOR BRIEF ENTRIES
   ============================================ */

.archive-list {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-divider);
    padding: var(--c-space-2xl);
    margin-top: var(--c-space-2xl);
}

.archive-list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--c-space-xl);
    padding-bottom: var(--c-space-lg);
    border-bottom: 2px solid var(--color-divider);
}

.archive-list-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin: 0;
}

.archive-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    font-weight: var(--font-weight-medium);
}

.archive-entry {
    padding: var(--c-space-lg) 0;
    border-bottom: 1px solid var(--color-divider);
    transition: background-color var(--transition-fast);
}

.archive-entry:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.archive-entry:hover {
    background-color: rgba(39, 116, 174, 0.02);
    margin: 0 calc(-1 * var(--c-space-lg));
    padding-left: var(--c-space-lg);
    padding-right: var(--c-space-lg);
    border-radius: var(--radius-md);
}

.archive-entry-text {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
    margin: 0;
}

.archive-entry-title {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */

.csrc-scroll-to-top {
    position: fixed;
    bottom: var(--c-space-xl);
    right: var(--c-space-xl);
    width: 56px;
    height: 56px;
    background: var(--color-ucla-blue);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-base);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.8);
    z-index: 50;
    backdrop-filter: blur(10px);
}

.csrc-scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.csrc-scroll-to-top:hover {
    background: var(--color-ucla-blue-dark);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 20px rgba(39, 116, 174, 0.3);
}

.csrc-scroll-to-top:active {
    transform: translateY(0) scale(0.95);
}

.csrc-scroll-to-top:focus {
    outline: 2px solid var(--color-ucla-gold);
    outline-offset: 2px;
}

.csrc-scroll-to-top-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes csrcFadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.csrc-fade-in {
    opacity: 0;
    animation: csrcFadeInUp 0.6s ease-out forwards;
}

.csrc-stagger-1 { animation-delay: 0.1s; }
.csrc-stagger-2 { animation-delay: 0.2s; }
.csrc-stagger-3 { animation-delay: 0.3s; }
.csrc-stagger-4 { animation-delay: 0.4s; }
.csrc-stagger-5 { animation-delay: 0.5s; }
.csrc-stagger-6 { animation-delay: 0.6s; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    .csrc-combined-publications__content {
        padding-left: var(--c-space-lg);
        padding-right: var(--c-space-lg);
    }

    .csrc-primary-tab-container {
        margin: 0 calc(-1 * var(--c-space-lg)) var(--c-space-xl);
        padding: var(--c-space-md) var(--c-space-lg);
    }

    .csrc-page-title {
        font-size: var(--font-size-3xl);
    }

    .csrc-section-title {
        font-size: var(--font-size-2xl);
    }
}

@media (max-width: 768px) {
    .csrc-combined-publications__content {
        padding: 0 var(--c-space-md);
        margin: var(--c-space-2xl) auto;
    }

    .csrc-primary-tab-container {
        margin: 0 calc(-1 * var(--c-space-md)) var(--c-space-xl);
        padding: var(--c-space-sm) var(--c-space-md);
    }

    .csrc-primary-tab-navigation {
        gap: var(--c-space-sm);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--c-space-lg);
    }

    .csrc-primary-tabs-group {
        width: 100%;
    }

    .csrc-secondary-tabs-group {
        width: 100%;
        justify-content: flex-start;
    }

    .csrc-secondary-tab-navigation {
        gap: var(--c-space-md);
    }

    .csrc-primary-tab-button {
        padding: var(--c-space-sm) var(--c-space-md);
        font-size: var(--font-size-sm);
    }

    .csrc-secondary-tab-button {
        padding: var(--c-space-xs) var(--c-space-md);
        font-size: var(--font-size-xs);
    }

    .csrc-page-title {
        font-size: var(--font-size-3xl);
    }

    .book-archive-card {
        flex-direction: column;
        gap: var(--c-space-lg);
    }

    .book-cover-column {
        width: 100%;
        max-width: 200px;
        margin: 0 auto;
    }

    .book-cover-placeholder {
        height: 280px;
    }

    .flex-row {
        flex-direction: column;
        gap: var(--c-space-md);
        align-items: flex-start;
    }

    .archive-list {
        padding: var(--c-space-lg);
    }
}

@media (max-width: 480px) {
    .csrc-combined-publications__content {
        padding: 0 var(--c-space-sm);
    }

    .csrc-primary-tab-container {
        margin: 0 calc(-1 * var(--c-space-sm)) var(--c-space-xl);
        padding: var(--c-space-sm);
    }

    .csrc-primary-tab-button {
        padding: var(--c-space-xs) var(--c-space-sm);
        font-size: var(--font-size-xs);
    }

    .csrc-secondary-tab-button {
        padding: var(--c-space-xs) var(--c-space-sm);
        font-size: var(--font-size-xs);
    }

    .csrc-page-title {
        font-size: var(--font-size-2xl);
    }

    .csrc-scroll-to-top {
        bottom: var(--c-space-lg);
        right: var(--c-space-lg);
        width: 48px;
        height: 48px;
        font-size: var(--font-size-base);
    }

    .csrc-scroll-to-top-icon {
        width: 20px;
        height: 20px;
    }

    .book-metadata {
        flex-direction: column;
        gap: var(--c-space-xs);
    }

    .metadata-separator {
        display: none;
    }
}

/* ============================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    .csrc-fade-in {
        opacity: 1;
        animation: none;
    }

    .csrc-tab-panel {
        transition: none !important;
    }

    * {
        transition: none !important;
    }
}

@media (prefers-contrast: high) {
    .csrc-tab-button {
        text-decoration: underline;
    }

    .book-archive-card {
        border-bottom: 2px solid #000;
    }
}

/* Print Styles */
@media print {
    .csrc-primary-tab-container,
    .csrc-secondary-tab-container {
        display: none;
    }

    .csrc-primary-tab-panel,
    .csrc-secondary-tab-panel {
        opacity: 1 !important;
        visibility: visible !important;
        position: relative !important;
    }

    .book-archive-card {
        border-bottom: 1px solid #000;
        break-inside: avoid;
        margin-bottom: var(--c-space-lg);
    }

    .archive-list {
        box-shadow: none;
        border: 1px solid #000;
    }
}

/* Empty state styles */
.csrc-empty-state {
    text-align: center;
    padding: var(--c-space-3xl) var(--c-space-xl);
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: var(--line-height-relaxed);
}

/* Collection accordion styles */
.collection-accordion-item {
    margin: var(--c-space-2xl) 0;
}

.collection-accordion-item:first-child {
    margin-top: 0;
}

.collection-accordion-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: none;
    border: none;
    padding: 0 0 var(--c-space-sm);
    cursor: pointer;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    transition: border-bottom-color 0.2s ease;
}

.collection-accordion-header:hover {
    border-bottom-color: var(--color-primary);
}

button.collection-accordion-header:not([disabled]):focus {
    outline: none;
    outline-offset: 0;
}

button.collection-accordion-header:not([disabled]):focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.collection-title {
    font-size: var(--font-size-xl);
    font-weight: 500;
    margin: 0;
    color: var(--color-text-primary);
    letter-spacing: -0.015em;
    line-height: 1.3;
    flex-grow: 1;
}

.collection-chevron {
    flex-shrink: 0;
    margin-left: var(--c-space-md);
    color: var(--color-text-secondary);
    transition: transform 0.3s ease;
}

.collection-accordion-item[data-state="open"] .collection-chevron {
    transform: rotate(180deg);
}

.collection-accordion-item[data-state="closed"] .collection-chevron {
    transform: rotate(0deg);
}

.collection-content {
    overflow: hidden;
    transition: height 0.3s ease, opacity 0.2s ease;
    padding-top: var(--c-space-lg);
}

.collection-content.collapsed {
    height: 0 !important;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
}

/* Legacy collection header class for backwards compatibility */
.csrc-collection-header {
    font-size: var(--font-size-xl);
    font-weight: 500;
    margin: var(--c-space-2xl) 0 var(--c-space-xl);
    color: var(--color-text-primary);
    padding: 0 0 var(--c-space-sm);
    border-bottom: 1px solid var(--color-border);
    letter-spacing: -0.015em;
    line-height: 1.3;
}

.csrc-collection-header:first-child {
    margin-top: 0;
}