:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #64748b;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.5;
    padding-bottom: 4rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
/* Header */
/* Header */
header {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow);
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-logo {
    height: 48px;
    width: auto;
    object-fit: contain;
}


.badge {
    font-size: 0.875rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    background-color: var(--primary);
    color: white;
    font-weight: 500;
}

.last-updated {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    text-decoration: none;
}

.btn-download:hover {
    background-color: var(--primary-dark);
}

/* Comparison Info */
.comparison-info {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--border);
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.pdf-badges {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

.pdf-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: #f1f5f9;
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text-main);
    border: 1px solid var(--border);
}

.pdf-badge strong {
    color: var(--primary-dark);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: transform 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
}

.stat-title {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-main);
}

.stat-card.new .stat-value {
    color: var(--primary);
}

.stat-card.increase .stat-value {
    color: var(--warning);
}

.stat-card.decrease .stat-value {
    color: var(--success);
}

.stat-card.stockout .stat-value {
    color: var(--danger);
}

/* Sections */
.section {
    margin-bottom: 3rem;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border);
}

.section-header h2 {
    font-size: 1.5rem;
    color: var(--text-main);
}

.count-bubble {
    background: var(--text-main);
    color: white;
    padding: 0.125rem 0.625rem;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.product-card {
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    box-shadow: var(--shadow);
    border-color: var(--primary);
}

.card-header {
    padding: 1rem;
    background: #f8fafc;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: start;
}

.brand-tag {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--primary);
    background: #dbeafe;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.page-info {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.card-body {
    padding: 1rem;
    flex-grow: 1;
}

.product-name {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-main);
    line-height: 1.4;
}

.price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--border);
}

.price-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.price-value {
    font-weight: 700;
    font-size: 1.125rem;
}

/* Variant Styles */
.card-added .price-value {
    color: var(--primary);
}

.card-stockout {
    opacity: 0.8;
}

.card-stockout .product-name {
    color: var(--text-muted);
}

.card-stockout .price-value {
    color: var(--danger);
}

.card-stockout::after {
    content: 'Stock Out';
    display: block;
    text-align: center;
    background: #fef2f2;
    color: var(--danger);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem;
    text-transform: uppercase;
    border-top: 1px solid var(--border);
}

/* Price Change Specifics */
.price-change-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.old-price {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-decoration: line-through;
}

.new-price {
    font-weight: 700;
    font-size: 1.125rem;
}

.change-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
}

.change-badge.increase {
    background: #fef2f2;
    color: var(--danger);
}

.change-badge.decrease {
    background: #f0fdf4;
    color: var(--success);
}

/* Loading */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    color: var(--text-muted);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #e2e8f0;
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

/* Mobile Responsiveness */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    .container {
        padding: 0 1rem;
    }

    header {
        padding: 1.5rem 1rem;
        margin-bottom: 1.5rem;
    }

    .header-content {
        flex-direction: column;
        align-items: center;
        /* Center align for mobile */
        gap: 1rem;
        text-align: center;
    }

    .header-actions {
        flex-direction: column;
        gap: 0.75rem;
        width: 100%;
    }

    h1 {
        font-size: 1.5rem;
        flex-direction: column;
        /* Stack logo and text */
        gap: 0.5rem;
    }

    .header-logo {
        height: 60px;
        /* Slightly larger logo on mobile stack */
    }

    .pdf-badges {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .pdf-badge {
        width: 100%;
        justify-content: flex-start;
        font-size: 0.75rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        display: block;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    .product-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .stat-value {
        font-size: 1.75rem;
    }
}