:root {
    --primary-bg: #faf8f5;
    --secondary-bg: #ffffff;
    --accent-color: #8b4513;
    --accent-hover: #6d3410;
    --text-primary: #2c2418;
    --text-secondary: #5c5040;
    --text-muted: #8b7e70;
    --border-color: #e5dfd5;
    --shadow-sm: 0 2px 8px rgba(44, 36, 24, 0.06);
    --shadow-md: 0 4px 16px rgba(44, 36, 24, 0.1);
    --shadow-lg: 0 8px 32px rgba(44, 36, 24, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Work Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
}

/* Subtle paper texture overlay */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    z-index: 1;
    background-image: url('data:image/svg+xml;utf8,<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"><filter id="noiseFilter"><feTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="4" stitchTiles="stitch"/></filter><rect width="100%" height="100%" filter="url(%23noiseFilter)"/></svg>');
}

/* Header */
.site-header {
    background: linear-gradient(135deg, #2c2418 0%, #3d3426 100%);
    color: var(--primary-bg);
    padding: 3rem 2rem 2.5rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.site-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255, 255, 255, 0.02) 10px,
        rgba(255, 255, 255, 0.02) 20px
    );
    pointer-events: none;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
    position: relative;
    z-index: 2;
}

.title-block {
    animation: slideInLeft 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-title {
    font-family: 'Crimson Pro', Georgia, serif;
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
    line-height: 1.1;
}

.subtitle {
    font-size: 1.1rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    opacity: 0.85;
    margin-left: 2px;
}

.header-stats {
    display: flex;
    gap: 3rem;
    animation: slideInRight 0.8s cubic-bezier(0.16, 1, 0.3, 1);
	align-items: flex-end;
    flex-wrap: wrap;				
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.date-selector-stat {
    position: relative;
}

.stat-number {
    font-family: 'Crimson Pro', Georgia, serif;
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.7;
    font-weight: 300;
	transition: opacity 0.3s ease;							  
}

.file-selector-container {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
}

.file-selector-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.7;
    font-weight: 300;
}

.file-select {
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    font-size: 0.9rem;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    color: var(--primary-bg);
    appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="%23faf8f5" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"></polyline></svg>');
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 14px;
    min-width: 200px;
}

.file-select:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
}

.file-select:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.file-select option {
    background: var(--text-primary);
    color: var(--primary-bg);
}

.stat-number {
    font-family: 'Crimson Pro', Georgia, serif;
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.7;
    font-weight: 300;
    transition: opacity 0.3s ease;
}

.stat-label.hidden {
    opacity: 0;
    height: 0;
    overflow: hidden;
    margin: 0;
}

.stat-number-select {
    font-family: 'Crimson Pro', Georgia, serif;
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1;
    margin-bottom: 0.25rem;
    background: transparent;
    border: none;
    color: var(--primary-bg);
    cursor: pointer;
    appearance: none;
    padding-right: 2.5rem;
    text-align: right;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="%23faf8f5" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"></polyline></svg>');
    background-repeat: no-repeat;
    background-position: right center;
    background-size: 20px;
}

.stat-number-select:hover {
    opacity: 0.8;
    transform: translateY(-2px);
}

.stat-number-select:focus {
    outline: none;
    opacity: 1;
}

.stat-number-select option {
    background: var(--text-primary);
    color: var(--primary-bg);
    font-size: 1rem;
    padding: 0.5rem 1rem;
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem;
    animation: fadeIn 1s ease-out 0.2s both;
}

/* Controls */
.controls-section {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    align-items: center;
}

.search-container {
    position: relative;
    flex: 1;
    min-width: 280px;
}

.search-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 1rem 1.25rem 1rem 3.25rem;
    font-size: 1rem;
    font-family: inherit;
    background: var(--secondary-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    color: var(--text-primary);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(139, 69, 19, 0.1);
    transform: translateY(-1px);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.filters {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-select {
    padding: 1rem 2.5rem 1rem 1.25rem;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--secondary-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    color: var(--text-primary);
    appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="%235c5040" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"></polyline></svg>');
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 16px;
}

.filter-select:hover {
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

.filter-select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(139, 69, 19, 0.1);
}

/* Results Info */
.results-info {
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Table */
.table-container {
    background: var(--secondary-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.books-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.books-table thead {
    background: linear-gradient(180deg, #f5f1eb 0%, #ebe5dc 100%);
    position: sticky;
    top: 0;
    z-index: 10;
}

.books-table th {
    padding: 1.25rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: background 0.2s ease;
    user-select: none;
}

.books-table th:hover {
    background: rgba(139, 69, 19, 0.05);
}

.books-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    animation: fadeInUp 0.4s ease-out both;
}

.books-table tbody tr:hover {
    background: rgba(139, 69, 19, 0.03);
    transform: translateX(4px);
}

.books-table td {
    padding: 1.25rem 1rem;
    color: var(--text-secondary);
}

.books-table td:first-child {
    font-weight: 500;
    color: var(--text-primary);
    font-family: 'Crimson Pro', Georgia, serif;
    font-size: 1.05rem;
}

.books-table td:nth-child(8) {
    font-weight: 600;
    color: var(--accent-color);
    font-family: 'Crimson Pro', Georgia, serif;
    font-size: 1.1rem;
}

/* Loading and Error States */
.loading-state,
.error-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

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

/* Footer */
.site-footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

.site-footer a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.site-footer a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .site-title {
        font-size: 2.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .header-stats {
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .site-header {
        padding: 2rem 1.5rem;
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header-stats {
        align-self: stretch;
        justify-content: space-between;
        gap: 1.5rem;					
    }
    
    .stat-item {
        align-items: flex-start;
    }
    
    .file-selector-container {
        align-items: flex-start;
        align-self: stretch;
    }
    
    .file-select {
        width: 100%;
    }
	
    .main-content {
        padding: 2rem 1rem;
    }
    
    .controls-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-container {
        min-width: 100%;
    }
    
    .filters {
        flex-direction: column;
    }
    
    .filter-select {
        width: 100%;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .books-table {
        min-width: 800px;
    }
    
    .books-table th,
    .books-table td {
        padding: 1rem 0.75rem;
        font-size: 0.85rem;
    }
}

/* Stagger animation for table rows */
.books-table tbody tr:nth-child(1) { animation-delay: 0.05s; }
.books-table tbody tr:nth-child(2) { animation-delay: 0.1s; }
.books-table tbody tr:nth-child(3) { animation-delay: 0.15s; }
.books-table tbody tr:nth-child(4) { animation-delay: 0.2s; }
.books-table tbody tr:nth-child(5) { animation-delay: 0.25s; }
.books-table tbody tr:nth-child(6) { animation-delay: 0.3s; }
.books-table tbody tr:nth-child(7) { animation-delay: 0.35s; }
.books-table tbody tr:nth-child(8) { animation-delay: 0.4s; }
.books-table tbody tr:nth-child(9) { animation-delay: 0.45s; }
.books-table tbody tr:nth-child(10) { animation-delay: 0.5s; }