/* Books Page Specific Styles - Biblical Manuscript Theme */

/* ============================================
   Testament Color Variables
   ============================================ */
:root {
    /* Old Testament - Earthy Brown/Gold tones */
    --ot-primary: #8b6914;
    --ot-secondary: #a67c00;
    --ot-bg: linear-gradient(135deg, #f5e6c8 0%, #e8d5a8 100%);
    --ot-border: #9a7b4f;
    --ot-badge-bg: #8b6914;
    --ot-badge-text: #fff8e7;

    /* New Testament - Blue/Purple tones */
    --nt-primary: #4a3b8c;
    --nt-secondary: #6b5bb3;
    --nt-bg: linear-gradient(135deg, #e8e4f4 0%, #d4cee8 100%);
    --nt-border: #6b5bb3;
    --nt-badge-bg: #4a3b8c;
    --nt-badge-text: #f0eef8;
}

/* ============================================
   Filter Controls
   ============================================ */
.filter-controls {
    background: linear-gradient(to bottom, var(--parchment-light), var(--parchment-dark));
    border: 2px solid var(--bronze-accent);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 2px 8px var(--shadow-light);
}

.filter-group {
    margin-bottom: var(--spacing-sm);
}

.filter-group:last-child {
    margin-bottom: 0;
}

.filter-label {
    display: block;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-ink);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.filter-btn {
    padding: 0.4rem 0.8rem;
    background: linear-gradient(to bottom, var(--parchment-darker), var(--parchment-dark));
    border: 2px solid var(--bronze-accent);
    border-radius: var(--radius-sm);
    color: var(--text-ink);
    font-family: var(--font-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 4px var(--shadow-light);
}

.filter-btn:hover {
    background: linear-gradient(to bottom, var(--parchment-light), var(--parchment-darker));
    border-color: var(--gold-accent);
    transform: translateY(-1px);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--red-accent), var(--red-dark));
    color: var(--parchment-light);
    border-color: var(--red-dark);
    box-shadow: 0 2px 8px rgba(122, 40, 24, 0.4);
}

/* Testament-specific filter buttons */
.filter-btn.filter-ot {
    border-color: var(--ot-border);
}

.filter-btn.filter-ot.active {
    background: linear-gradient(135deg, var(--ot-primary), var(--ot-secondary));
    border-color: var(--ot-primary);
    box-shadow: 0 2px 8px rgba(139, 105, 20, 0.4);
}

.filter-btn.filter-nt {
    border-color: var(--nt-border);
}

.filter-btn.filter-nt.active {
    background: linear-gradient(135deg, var(--nt-primary), var(--nt-secondary));
    border-color: var(--nt-primary);
    box-shadow: 0 2px 8px rgba(74, 59, 140, 0.4);
}

/* ============================================
   Testament Filter Tabs
   ============================================ */
.testament-tabs {
    display: flex;
    gap: 0;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(to bottom, rgba(42, 34, 32, 0.8), rgba(26, 19, 18, 0.8));
    border-radius: var(--radius-md);
    border: 2px solid var(--bronze-accent);
    overflow: hidden;
}

.testament-tab {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    border-right: 1px solid var(--bronze-accent);
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--parchment-light);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.testament-tab:last-child {
    border-right: none;
}

.testament-tab:hover {
    background: rgba(201, 169, 97, 0.2);
}

.testament-tab.active {
    background: linear-gradient(135deg, var(--gold-accent) 0%, var(--bronze-accent) 100%);
    color: var(--text-ink);
}

.testament-tab.active.old-testament {
    background: linear-gradient(135deg, var(--ot-primary) 0%, var(--ot-secondary) 100%);
    color: var(--ot-badge-text);
}

.testament-tab.active.new-testament {
    background: linear-gradient(135deg, var(--nt-primary) 0%, var(--nt-secondary) 100%);
    color: var(--nt-badge-text);
}

/* Books Count */
.books-count {
    font-family: var(--font-primary);
    font-size: 0.9rem;
    color: var(--parchment-light);
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    text-align: center;
}

/* ============================================
   Books Grid Layout (Responsive)
   ============================================ */
.books-grid,
.book-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-xs);
}

@media (min-width: 480px) {
    .books-grid,
    .book-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .books-grid,
    .book-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .books-grid,
    .book-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1400px) {
    .books-grid,
    .book-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ============================================
   Book Card - Manuscript Style
   ============================================ */
.book-card {
    background: linear-gradient(135deg, var(--parchment-light) 0%, var(--parchment-dark) 100%);
    border: 2px solid var(--bronze-accent);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px var(--shadow-light);
    display: flex;
    flex-direction: column;
    min-height: 140px;
}

/* Testament-specific styling */
.book-card.testament-ot,
.book-card.old-testament {
    background: var(--ot-bg);
    border-color: var(--ot-border);
}

.book-card.testament-ot::before,
.book-card.old-testament::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--ot-primary), var(--ot-secondary), var(--ot-primary));
}

.book-card.testament-nt,
.book-card.new-testament {
    background: var(--nt-bg);
    border-color: var(--nt-border);
}

.book-card.testament-nt::before,
.book-card.new-testament::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--nt-primary), var(--nt-secondary), var(--nt-primary));
}

.book-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow:
        0 8px 20px var(--shadow-color),
        0 0 0 2px rgba(201, 169, 97, 0.3);
}

.book-card.testament-ot:hover,
.book-card.old-testament:hover {
    border-color: var(--ot-primary);
    box-shadow:
        0 8px 20px var(--shadow-color),
        0 0 0 2px rgba(139, 105, 20, 0.3);
}

.book-card.testament-nt:hover,
.book-card.new-testament:hover {
    border-color: var(--nt-primary);
    box-shadow:
        0 8px 20px var(--shadow-color),
        0 0 0 2px rgba(74, 59, 140, 0.3);
}

.book-card.selected {
    box-shadow:
        0 8px 20px var(--shadow-color),
        0 0 0 3px var(--gold-accent),
        0 0 20px rgba(201, 169, 97, 0.4),
        inset 0 0 15px rgba(201, 169, 97, 0.15);
    transform: translateY(-4px) scale(1.03);
}

.book-card.testament-ot.selected,
.book-card.old-testament.selected {
    box-shadow:
        0 8px 20px var(--shadow-color),
        0 0 0 3px var(--ot-primary),
        0 0 20px rgba(139, 105, 20, 0.4),
        inset 0 0 15px rgba(139, 105, 20, 0.15);
}

.book-card.testament-nt.selected,
.book-card.new-testament.selected {
    box-shadow:
        0 8px 20px var(--shadow-color),
        0 0 0 3px var(--nt-primary),
        0 0 20px rgba(74, 59, 140, 0.4),
        inset 0 0 15px rgba(74, 59, 140, 0.15);
}

.book-card:active {
    transform: scale(0.98);
}

/* Book Card Header */
.book-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xs);
    padding-top: 4px;
}

.book-card-name {
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--text-ink);
    margin: 0;
    line-height: 1.2;
    text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.6);
}

.book-card.selected .book-card-name {
    color: var(--red-accent);
}

.book-card-chapters {
    font-size: 0.75rem;
    color: var(--text-ink-light);
    background: rgba(0, 0, 0, 0.1);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

/* ============================================
   Category Badges
   ============================================ */
.book-category-badge,
.category-badge {
    display: inline-block;
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    box-shadow: 0 1px 3px var(--shadow-light);
}

/* Law - Deep Red/Burgundy */
.book-category-badge.category-law,
.category-badge.law {
    background: linear-gradient(135deg, #8b4513 0%, #6b3010 100%);
    color: #fff8e7;
    border: 1px solid #6b3010;
}

/* History - Brown/Sepia */
.book-category-badge.category-history,
.category-badge.history {
    background: linear-gradient(135deg, #6b4423 0%, #4d3018 100%);
    color: #fff8e7;
    border: 1px solid #4d3018;
}

/* Poetry/Wisdom - Gold/Amber */
.book-category-badge.category-poetry,
.book-category-badge.category-wisdom,
.category-badge.poetry,
.category-badge.wisdom {
    background: linear-gradient(135deg, #8b6914 0%, #6b5010 100%);
    color: #fff8e7;
    border: 1px solid #6b5010;
}

/* Prophets - Forest Green/Olive */
.book-category-badge.category-major-prophets,
.book-category-badge.category-minor-prophets,
.book-category-badge.category-prophets,
.category-badge.prophets,
.category-badge.major-prophets,
.category-badge.minor-prophets {
    background: linear-gradient(135deg, #4a6b4a 0%, #3a5040 100%);
    color: #e8f0e8;
    border: 1px solid #3a5040;
}

/* Gospels - Royal Blue */
.book-category-badge.category-gospels,
.category-badge.gospels {
    background: linear-gradient(135deg, #4a3b8c 0%, #3a2b70 100%);
    color: #f0eef8;
    border: 1px solid #3a2b70;
}

/* Acts - Teal */
.book-category-badge.category-acts,
.category-badge.acts {
    background: linear-gradient(135deg, #3d5a80 0%, #2d4560 100%);
    color: #f0f4f8;
    border: 1px solid #2d4560;
}

/* Letters/Epistles - Purple */
.book-category-badge.category-pauline-epistles,
.book-category-badge.category-general-epistles,
.book-category-badge.category-letters,
.category-badge.letters,
.category-badge.epistles,
.category-badge.pauline-epistles,
.category-badge.general-epistles {
    background: linear-gradient(135deg, #5c4a99 0%, #4a3a7a 100%);
    color: #f0eef8;
    border: 1px solid #4a3a7a;
}

/* Apocalyptic/Revelation - Deep Purple/Crimson */
.book-category-badge.category-apocalyptic,
.book-category-badge.category-revelation,
.category-badge.apocalyptic,
.category-badge.revelation {
    background: linear-gradient(135deg, #7a2818 0%, #5a1810 100%);
    color: #fff8e7;
    border: 1px solid #5a1810;
}

/* Testament Indicator Badge */
.testament-indicator {
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 4px var(--shadow-light);
    flex-shrink: 0;
}

.testament-indicator.old-testament {
    background: linear-gradient(135deg, var(--ot-primary) 0%, var(--ot-secondary) 100%);
    color: var(--ot-badge-text);
}

.testament-indicator.new-testament {
    background: linear-gradient(135deg, var(--nt-primary) 0%, var(--nt-secondary) 100%);
    color: var(--nt-badge-text);
}

/* Book Author */
.book-card-author {
    font-size: 0.8rem;
    color: var(--text-ink-light);
    font-style: italic;
    margin-bottom: var(--spacing-xs);
}

/* Book Summary */
.book-card-summary {
    font-size: 0.8rem;
    color: var(--text-ink);
    line-height: 1.4;
    flex: 1;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* ============================================
   Detail Panel - Slide In Animation
   ============================================ */
.book-preview,
.book-detail-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.book-preview-header,
.book-detail-header {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-lg);
    border-bottom: 3px solid var(--bronze-accent);
    position: relative;
}

.book-preview-header::after,
.book-detail-header::after {
    content: '~';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--gold-accent);
    font-size: 1.5rem;
    background: linear-gradient(to bottom, var(--parchment-light), var(--parchment-dark));
    padding: 0 var(--spacing-sm);
}

.book-preview-header.testament-ot::after {
    color: var(--ot-primary);
}

.book-preview-header.testament-nt::after {
    color: var(--nt-primary);
}

/* Book Icon/Cover */
.book-icon {
    width: 100px;
    height: 140px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 4px solid var(--bronze-accent);
    box-shadow: 0 4px 12px var(--shadow-color);
    position: relative;
    flex-shrink: 0;
}

.book-icon.testament-ot {
    background: var(--ot-bg);
    border-color: var(--ot-border);
}

.book-icon.testament-nt {
    background: var(--nt-bg);
    border-color: var(--nt-border);
}

.book-icon-text {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-ink);
    text-align: center;
    line-height: 1;
}

.book-icon.testament-ot .book-icon-text {
    color: var(--ot-primary);
}

.book-icon.testament-nt .book-icon-text {
    color: var(--nt-primary);
}

@media (min-width: 768px) {
    .book-preview-header,
    .book-detail-header {
        flex-direction: row;
        align-items: flex-start;
    }
}

.book-header-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.book-preview-name,
.book-detail-title {
    font-size: 2.25rem;
    font-family: var(--font-heading);
    color: var(--red-accent);
    margin-bottom: 0.25rem;
    text-shadow: 2px 2px 6px rgba(255, 255, 255, 0.6);
    letter-spacing: 1px;
}

.book-preview-name.testament-ot {
    color: var(--ot-primary);
}

.book-preview-name.testament-nt {
    color: var(--nt-primary);
}

.book-preview-author,
.book-detail-subtitle {
    font-size: 1.15rem;
    color: var(--text-ink);
    font-style: italic;
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-primary);
}

/* Testament Badge (Large) */
.testament-badge-large {
    display: inline-block;
    font-size: 0.8rem;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    font-family: var(--font-heading);
    box-shadow: 0 2px 6px var(--shadow-light);
}

.testament-badge-large.testament-ot {
    background: var(--ot-badge-bg);
    color: var(--ot-badge-text);
}

.testament-badge-large.testament-nt {
    background: var(--nt-badge-bg);
    color: var(--nt-badge-text);
}

/* Book Meta Info */
.book-meta,
.book-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.book-meta-item {
    background: linear-gradient(135deg, var(--parchment-darker), var(--parchment-dark));
    padding: 0.5rem var(--spacing-sm);
    border-radius: var(--radius-sm);
    border: 2px solid var(--bronze-accent);
    box-shadow: 0 2px 4px var(--shadow-light);
}

.book-meta-label {
    font-size: 0.75rem;
    color: var(--text-ink);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    display: block;
    font-family: var(--font-heading);
}

.book-meta-value {
    font-size: 1rem;
    color: var(--text-ink);
    font-weight: 600;
    font-family: var(--font-primary);
}

/* ============================================
   Detail Panel Sections
   ============================================ */
.book-section {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.book-section-title {
    font-size: 1.5rem;
    font-family: var(--font-heading);
    color: var(--red-accent);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--gold-accent);
    position: relative;
    text-shadow: 1px 1px 3px rgba(255, 255, 255, 0.5);
    letter-spacing: 0.5px;
}

.book-section-title::after {
    content: '~';
    position: absolute;
    right: 0;
    bottom: -12px;
    color: var(--gold-accent);
    font-size: 1.2rem;
    background: linear-gradient(to bottom, var(--parchment-light), var(--parchment-dark));
    padding: 0 var(--spacing-xs);
}

.book-section-content {
    color: var(--text-ink);
    line-height: 1.9;
    font-size: 1.05rem;
}

.book-section-content p {
    margin-bottom: var(--spacing-md);
    text-align: justify;
}

/* Characters Section */
.book-characters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.book-character-item {
    background: linear-gradient(to bottom, var(--parchment-darker), var(--parchment-dark));
    border: 2px solid var(--bronze-accent);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
    box-shadow: 0 2px 6px var(--shadow-light);
}

.book-character-item:hover {
    border-color: var(--gold-accent);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px var(--shadow-color);
}

.book-character-name {
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--text-ink);
    font-size: 0.95rem;
}

.book-character-role {
    font-size: 0.75rem;
    color: var(--bronze-accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0.25rem;
    font-weight: 600;
}

/* Events Section */
.book-events-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.book-event-item {
    background: linear-gradient(to bottom, var(--parchment-darker), var(--parchment-dark));
    border: 2px solid var(--bronze-accent);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
    box-shadow: 0 2px 6px var(--shadow-light);
    border-left: 4px solid var(--gold-accent);
}

.book-event-item:hover {
    border-color: var(--gold-accent);
    transform: translateX(4px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.book-event-name {
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--text-ink);
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.book-event-description {
    font-size: 0.9rem;
    color: var(--text-ink-light);
    line-height: 1.6;
}

.book-event-reference {
    font-size: 0.75rem;
    color: var(--bronze-accent);
    font-style: italic;
    margin-top: 0.25rem;
}

/* Themes Section */
.themes-list,
.book-themes-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.theme-tag,
.book-theme-tag {
    background: linear-gradient(135deg, var(--parchment-darker), var(--parchment-dark));
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    border: 2px solid var(--bronze-accent);
    font-size: 0.85rem;
    color: var(--text-ink);
    font-family: var(--font-primary);
    transition: all var(--transition-fast);
}

.theme-tag:hover,
.book-theme-tag:hover {
    border-color: var(--gold-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px var(--shadow-color);
}

/* Related Items Grid */
.related-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.related-item-card {
    background: linear-gradient(to bottom, var(--parchment-darker), var(--parchment-dark));
    border: 2px solid var(--bronze-accent);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
    box-shadow: 0 2px 6px var(--shadow-light);
}

.related-item-card:hover {
    border-color: var(--gold-accent);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px var(--shadow-color);
}

.related-item-name {
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--text-ink);
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.related-item-type {
    font-size: 0.75rem;
    color: var(--bronze-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.25rem;
    font-weight: 600;
}

.related-item-desc {
    font-size: 0.875rem;
    color: var(--text-ink-light);
    line-height: 1.6;
}

/* Key Verses */
.key-verses-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.key-verse-item {
    background: linear-gradient(135deg, var(--parchment-darker), var(--parchment-dark));
    border: 2px solid var(--bronze-accent);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    box-shadow: 0 2px 4px var(--shadow-light);
}

.key-verse-reference {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--red-accent);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.key-verse-text {
    font-style: italic;
    color: var(--text-ink);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* ============================================
   Loading Spinner
   ============================================ */
.loading-state,
.book-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--text-ink-light);
    font-size: 1.125rem;
    font-family: var(--font-primary);
    font-style: italic;
    flex-direction: column;
    gap: var(--spacing-md);
}

.loading-state::after {
    content: '';
    width: 30px;
    height: 30px;
    border: 4px solid var(--bronze-accent);
    border-top-color: var(--red-accent);
    border-radius: 50%;
    animation: spin 1s ease-in-out infinite;
    margin-left: var(--spacing-sm);
    box-shadow: 0 2px 4px var(--shadow-light);
}

.book-loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bronze-accent);
    border-top-color: var(--red-accent);
    border-radius: 50%;
    animation: spin 1s ease-in-out infinite;
    box-shadow: 0 2px 8px var(--shadow-light);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.book-loading-text {
    color: var(--text-ink-light);
    font-style: italic;
}

/* Empty State */
.no-results,
.book-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    text-align: center;
    color: var(--text-ink-light);
    padding: var(--spacing-lg);
    font-style: italic;
}

.no-results h3,
.book-empty-message {
    color: var(--red-accent);
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.book-empty-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.book-empty-hint {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Error State */
.error-state,
.book-error-state {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--red-accent);
    flex-direction: column;
    gap: var(--spacing-sm);
    font-weight: 600;
    text-align: center;
    padding: var(--spacing-lg);
}

.book-error-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.book-error-message {
    font-size: 1.125rem;
}

.book-error-retry {
    margin-top: var(--spacing-md);
}

/* ============================================
   Book Actions
   ============================================ */
.book-actions {
    border-top: 2px solid var(--bronze-accent);
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
    text-align: center;
    position: relative;
}

.book-actions::before {
    content: '~';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--bronze-accent);
    font-size: 1rem;
    background: linear-gradient(to bottom, var(--parchment-light), var(--parchment-dark));
    padding: 0 var(--spacing-xs);
}

.btn-view-book {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--gold-accent) 0%, var(--bronze-accent) 50%, var(--gold-accent) 100%);
    background-size: 200% 100%;
    color: var(--text-ink);
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 3px solid var(--bronze-accent);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow:
        0 4px 8px var(--shadow-color),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(0, 0, 0, 0.1);
    text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.4);
    text-decoration: none;
}

.btn-view-book:hover {
    background-position: 100% 0;
    border-color: var(--gold-accent);
    transform: translateY(-2px);
    box-shadow:
        0 6px 16px var(--shadow-color),
        0 0 20px rgba(201, 169, 97, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.4),
        inset 0 -1px 0 rgba(0, 0, 0, 0.1);
}

.btn-view-book:active {
    transform: translateY(0);
    box-shadow:
        0 2px 4px var(--shadow-color),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-view-book .btn-icon {
    font-size: 1.1em;
    transition: transform var(--transition-fast);
}

.btn-view-book:hover .btn-icon {
    transform: translateX(3px);
}

/* ============================================
   Scrollbar Styling
   ============================================ */
.left-panel::-webkit-scrollbar,
.right-panel::-webkit-scrollbar,
.book-grid-container::-webkit-scrollbar,
.book-detail-panel::-webkit-scrollbar {
    width: 10px;
}

.left-panel::-webkit-scrollbar-track,
.right-panel::-webkit-scrollbar-track,
.book-grid-container::-webkit-scrollbar-track,
.book-detail-panel::-webkit-scrollbar-track {
    background: rgba(26, 19, 18, 0.5);
    border-radius: var(--radius-sm);
}

.left-panel::-webkit-scrollbar-thumb,
.right-panel::-webkit-scrollbar-thumb,
.book-grid-container::-webkit-scrollbar-thumb,
.book-detail-panel::-webkit-scrollbar-thumb {
    background: var(--bronze-accent);
    border-radius: var(--radius-sm);
    border: 2px solid rgba(26, 19, 18, 0.5);
}

.left-panel::-webkit-scrollbar-thumb:hover,
.right-panel::-webkit-scrollbar-thumb:hover,
.book-grid-container::-webkit-scrollbar-thumb:hover,
.book-detail-panel::-webkit-scrollbar-thumb:hover {
    background: var(--gold-accent);
}

/* Page Title Styling */
.page-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--gold-accent);
}

/* ============================================
   Mobile Responsive Styles
   ============================================ */
@media (max-width: 767px) {
    .filter-controls {
        padding: var(--spacing-sm);
    }

    .filter-buttons {
        gap: 4px;
    }

    .filter-btn {
        padding: 0.3rem 0.5rem;
        font-size: 0.75rem;
    }

    .books-grid,
    .book-grid {
        grid-template-columns: 1fr;
    }

    .book-card {
        min-height: auto;
    }

    .testament-tabs {
        flex-direction: column;
    }

    .testament-tab {
        border-right: none;
        border-bottom: 1px solid var(--bronze-accent);
    }

    .testament-tab:last-child {
        border-bottom: none;
    }

    .book-preview-name,
    .book-detail-title {
        font-size: 1.75rem;
    }

    .book-preview-author,
    .book-detail-subtitle {
        font-size: 1rem;
    }

    .book-section-title {
        font-size: 1.25rem;
    }

    .book-characters-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .book-meta,
    .book-detail-meta {
        flex-direction: column;
    }

    .book-meta-item {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .book-card-header {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .testament-indicator {
        align-self: flex-start;
    }

    .book-category-badge,
    .category-badge {
        font-size: 0.6rem;
        padding: 2px 5px;
    }

    .themes-list,
    .book-themes-list {
        gap: var(--spacing-xs);
    }

    .theme-tag,
    .book-theme-tag {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }
}

/* ============================================
   Dark Mode Support
   ============================================ */
@media (prefers-color-scheme: dark) {
    /* Book Cards - Dark Mode */
    .book-card {
        background: linear-gradient(135deg, #3a2a28 0%, #2a2220 100%);
        border-color: #6b5344;
    }

    .book-card:hover {
        border-color: #b89548;
        box-shadow:
            0 8px 20px rgba(0, 0, 0, 0.4),
            0 0 0 2px rgba(201, 169, 97, 0.3);
    }

    .book-card.selected {
        background: linear-gradient(135deg, #4a3a38 0%, #3a2a28 100%);
        border-color: #b89548;
    }

    .book-card-name {
        color: #f4e8d0;
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.6);
    }

    .book-card-chapters {
        color: #c9a961;
        background: rgba(255, 255, 255, 0.1);
    }

    .book-card-summary {
        color: #e8dcc0;
    }

    /* Old Testament - Dark Mode */
    .book-card.testament-ot,
    .book-card.old-testament {
        background: linear-gradient(135deg, #3d3020 0%, #2d2418 100%);
        border-color: #6b5344;
    }

    .book-card.testament-ot:hover,
    .book-card.old-testament:hover,
    .book-card.testament-ot.selected,
    .book-card.old-testament.selected {
        border-color: #b89548;
    }

    /* New Testament - Dark Mode */
    .book-card.testament-nt,
    .book-card.new-testament {
        background: linear-gradient(135deg, #2d2838 0%, #232030 100%);
        border-color: #4a4070;
    }

    .book-card.testament-nt:hover,
    .book-card.new-testament:hover,
    .book-card.testament-nt.selected,
    .book-card.new-testament.selected {
        border-color: #7a6fa0;
    }

    /* Filter Controls - Dark Mode */
    .filter-controls {
        background: linear-gradient(to bottom, #3a2a28, #2a2220);
        border-color: #6b5344;
    }

    .filter-label {
        color: #f4e8d0;
    }

    .filter-btn {
        background: linear-gradient(to bottom, #4a3a38, #3a2a28);
        color: #f4e8d0;
        border-color: #6b5344;
    }

    .filter-btn:hover {
        border-color: #b89548;
        background: linear-gradient(to bottom, #5a4a48, #4a3a38);
    }

    .filter-btn.active {
        background: linear-gradient(135deg, #8b2e1f, #6b1f15);
        color: #f4e8d0;
    }

    /* Testament Tabs - Dark Mode */
    .testament-tabs {
        background: linear-gradient(to bottom, #3a2a28, #2a2220);
        border-color: #6b5344;
    }

    .testament-tab {
        color: #f4e8d0;
        border-color: #6b5344;
    }

    .testament-tab:hover {
        background: rgba(201, 169, 97, 0.2);
    }

    /* Detail Panel - Dark Mode */
    .book-preview,
    .book-detail-panel {
        background: linear-gradient(to bottom, #2a2220, #1a1312);
    }

    .book-preview-name,
    .book-detail-title {
        color: #c9a961;
        text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.6);
    }

    .book-preview-author,
    .book-detail-subtitle {
        color: #e8dcc0;
    }

    .book-preview-header::after,
    .book-detail-header::after {
        background: linear-gradient(to bottom, #2a2220, #1a1312);
    }

    .book-meta-item {
        background: linear-gradient(135deg, #3a2a28, #2a2220);
        border-color: #6b5344;
    }

    .book-meta-label,
    .book-meta-value {
        color: #f4e8d0;
    }

    .book-section-title {
        color: #c9a961;
        border-color: #b89548;
    }

    .book-section-title::after {
        background: linear-gradient(to bottom, #2a2220, #1a1312);
    }

    .book-section-content {
        color: #e8dcc0;
    }

    /* Character Items - Dark Mode */
    .book-character-item {
        background: linear-gradient(to bottom, #3a2a28, #2a2220);
        border-color: #6b5344;
    }

    .book-character-item:hover {
        border-color: #b89548;
    }

    .book-character-name {
        color: #f4e8d0;
    }

    .book-character-role {
        color: #c9a961;
    }

    /* Event Items - Dark Mode */
    .book-event-item {
        background: linear-gradient(to bottom, #3a2a28, #2a2220);
        border-color: #6b5344;
        border-left-color: #b89548;
    }

    .book-event-item:hover {
        border-color: #b89548;
    }

    .book-event-name {
        color: #f4e8d0;
    }

    .book-event-description {
        color: #c9a961;
    }

    .book-event-reference {
        color: #8b7355;
    }

    /* Theme Tags - Dark Mode */
    .theme-tag,
    .book-theme-tag {
        background: linear-gradient(135deg, #3a2a28, #2a2220);
        color: #f4e8d0;
        border-color: #6b5344;
    }

    .theme-tag:hover,
    .book-theme-tag:hover {
        border-color: #b89548;
    }

    /* Related Items - Dark Mode */
    .related-item-card {
        background: linear-gradient(to bottom, #3a2a28, #2a2220);
        border-color: #6b5344;
    }

    .related-item-card:hover {
        border-color: #b89548;
    }

    .related-item-name {
        color: #f4e8d0;
    }

    .related-item-type {
        color: #c9a961;
    }

    .related-item-desc {
        color: #b8a888;
    }

    /* Key Verses - Dark Mode */
    .key-verse-item {
        background: linear-gradient(135deg, #3a2a28, #2a2220);
        border-color: #6b5344;
    }

    .key-verse-reference {
        color: #c24a3a;
    }

    .key-verse-text {
        color: #e8dcc0;
    }

    /* Loading/Empty/Error States - Dark Mode */
    .loading-state,
    .book-loading,
    .no-results,
    .book-empty-state {
        color: #c9a961;
    }

    .book-loading-spinner {
        border-color: #6b5344;
        border-top-color: #8b2e1f;
    }

    .error-state,
    .book-error-state {
        color: #c24a3a;
    }

    /* Book Actions - Dark Mode */
    .book-actions {
        border-color: #6b5344;
    }

    .book-actions::before {
        color: #6b5344;
        background: linear-gradient(to bottom, #2a2220, #1a1312);
    }

    .btn-view-book {
        background: linear-gradient(135deg, #8b7355 0%, #6b5344 50%, #8b7355 100%);
        color: #f4e8d0;
        border-color: #6b5344;
    }

    .btn-view-book:hover {
        border-color: #b89548;
    }

    /* Scrollbar - Dark Mode */
    .left-panel::-webkit-scrollbar-track,
    .right-panel::-webkit-scrollbar-track,
    .book-grid-container::-webkit-scrollbar-track,
    .book-detail-panel::-webkit-scrollbar-track {
        background: rgba(26, 19, 18, 0.8);
    }

    .left-panel::-webkit-scrollbar-thumb,
    .right-panel::-webkit-scrollbar-thumb,
    .book-grid-container::-webkit-scrollbar-thumb,
    .book-detail-panel::-webkit-scrollbar-thumb {
        background: #6b5344;
        border-color: rgba(26, 19, 18, 0.8);
    }

    .left-panel::-webkit-scrollbar-thumb:hover,
    .right-panel::-webkit-scrollbar-thumb:hover,
    .book-grid-container::-webkit-scrollbar-thumb:hover,
    .book-detail-panel::-webkit-scrollbar-thumb:hover {
        background: #b89548;
    }
}