:root {
    --bg-page: #f5f0e8;
    --bg-surface: #fcf9f5;
    --text-main: #2c2416;
    --text-muted: #8b7d6b;
    --primary: #2b5f8a;
    --primary-dark: #1e4060;
    --primary-light: #dae6f2;
    --border: #d6ccbd;
    --border-strong: #b8a88e;
    --success: #3d7a4a;
    --success-light: #e6f0e8;
    --danger: #b34141;
    --danger-light: #fbe9e9;
    --warning: #c4903a;
    --warning-light: #f5ede0;
    --shadow: 2px 2px 0 rgba(44, 36, 22, 0.08);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-page);
    background-image: radial-gradient(circle, rgba(44, 36, 22, 0.05) 1px, transparent 1px);
    background-size: 24px 24px;
    color: var(--text-main);
    line-height: 1.6;
    padding-bottom: 4rem;
}

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

/* Header */
header {
    background: var(--bg-surface);
    border: 3px double var(--border-strong);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow);
}

.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;
    letter-spacing: -0.02em;
}

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

.last-updated {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-family: 'Courier New', Courier, monospace;
    letter-spacing: 0.02em;
}

.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: var(--primary);
    color: white;
    border: 2px solid var(--primary-dark);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, box-shadow 0.15s;
    text-decoration: none;
    box-shadow: 2px 2px 0 rgba(44, 36, 22, 0.15);
}

.btn-download:hover {
    background: var(--primary-dark);
    box-shadow: 1px 1px 0 rgba(44, 36, 22, 0.15);
}

/* Comparison Info */
.comparison-info {
    background: var(--bg-surface);
    border: 3px double var(--border-strong);
    padding: 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: var(--shadow);
    position: relative;
}

.comparison-info::before {
    content: 'WEEK OVER WEEK COMPARISON';
    display: block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-bottom: -0.25rem;
}

.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;
    border: 2px solid;
    font-size: 0.875rem;
    color: var(--text-main);
    font-weight: 500;
}

.pdf-badge:first-child {
    background: var(--danger-light);
    border-color: var(--danger);
}

.pdf-badge:last-child {
    background: var(--success-light);
    border-color: var(--success);
}

.pdf-badge span {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.04em;
}

.pdf-badge strong {
    font-weight: 700;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
}

.pdf-badge:first-child strong { color: var(--danger); }
.pdf-badge:last-child strong { color: var(--success); }

/* Search */
.search-container {
    margin-bottom: 2rem;
}

.search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-surface);
    border: 2px solid var(--border);
    padding: 0.75rem 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-light);
}

.search-icon {
    font-size: 1.125rem;
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.search-wrapper input {
    border: none;
    outline: none;
    background: transparent;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-main);
    width: 100%;
}

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

.search-clear {
    background: none;
    border: 2px solid transparent;
    font-size: 0.875rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: background 0.15s, color 0.15s;
    flex-shrink: 0;
    font-family: inherit;
}

.search-clear:hover {
    background: var(--bg-page);
    color: var(--text-main);
    border-color: var(--border);
}

.search-info {
    margin-top: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-info .match-count {
    font-weight: 600;
    color: var(--primary);
}

.product-card.search-hidden {
    display: none;
}

.section.search-empty .product-grid::after {
    content: 'No matching products in this section';
    grid-column: 1 / -1;
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    border: 2px dashed var(--border);
}

/* 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(--bg-surface);
    border: 2px solid var(--border);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    position: relative;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.stat-card.new::before { background: var(--primary); }
.stat-card.increase::before { background: var(--warning); }
.stat-card.decrease::before { background: var(--success); }
.stat-card.stockout::before { background: var(--danger); }

.stat-card:hover {
    box-shadow: 3px 3px 0 rgba(44, 36, 22, 0.12);
}

.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;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-main);
    font-family: 'Courier New', Courier, monospace;
}

.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: 2.5rem;
}

/* Collapsible */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    margin-bottom: 0;
    background: var(--bg-surface);
    border: 2px solid var(--border);
    cursor: pointer;
    user-select: none;
    transition: background 0.15s, border-color 0.15s;
}

.section-header:hover {
    background: var(--bg-page);
    border-color: var(--border-strong);
}

.section-header:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.section-header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.collapse-icon {
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: transform 0.2s;
    flex-shrink: 0;
    width: 16px;
    text-align: center;
}

.collapsible.collapsed .collapse-icon {
    transform: rotate(-90deg);
}

.section-header h2 {
    font-size: 1.25rem;
    color: var(--text-main);
    font-weight: 700;
    letter-spacing: -0.01em;
}

.count-bubble {
    background: var(--text-main);
    color: var(--bg-surface);
    padding: 0.125rem 0.625rem;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: 'Courier New', Courier, monospace;
    border: 1px solid var(--text-main);
}

.collapsible-body {
    max-height: 10000px;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.2s ease, padding 0.2s ease;
    opacity: 1;
    padding-top: 1.5rem;
}

.collapsible.collapsed .collapsible-body {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
}

/* Sub-section headers within collapsible */
.sub-section-header {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding: 0.5rem 0;
    border-bottom: 2px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sub-section-header.increase { color: var(--danger); border-bottom-color: var(--danger-light); }
.sub-section-header.decrease { color: var(--success); border-bottom-color: var(--success-light); }

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

/* Product Card */
.product-card {
    background: var(--bg-surface);
    border: 2px solid var(--border);
    transition: border-color 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    position: relative;
}

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

.card-header {
    padding: 0.75rem 1rem;
    background: var(--bg-page);
    border-bottom: 2px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-tag {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--primary);
    background: var(--primary-light);
    padding: 0.25rem 0.5rem;
    letter-spacing: 0.05em;
    border: 1px solid var(--primary);
}

.page-info {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'Courier New', Courier, monospace;
}

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

.product-name {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-main);
    line-height: 1.4;
    font-size: 0.9375rem;
}

.price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 0.75rem;
    border-top: 2px dashed var(--border);
}

.price-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-weight: 500;
}

.price-value {
    font-weight: 700;
    font-size: 1.125rem;
    font-family: 'Courier New', Courier, monospace;
}

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

.card-stockout {
    opacity: 0.85;
}

.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: var(--danger-light);
    color: var(--danger);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.375rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-top: 2px solid var(--border);
}

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

.old-price {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-decoration: line-through;
    font-family: 'Courier New', Courier, monospace;
}

.new-price {
    font-weight: 700;
    font-size: 1.125rem;
    font-family: 'Courier New', Courier, monospace;
}

.change-badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.125rem 0.5rem;
    border: 1px solid;
    font-family: 'Courier New', Courier, monospace;
}

.change-badge.increase {
    background: var(--danger-light);
    color: var(--danger);
    border-color: var(--danger);
}

.change-badge.decrease {
    background: var(--success-light);
    color: var(--success);
    border-color: var(--success);
}

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

.loading p {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.875rem;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    margin-bottom: 1rem;
    animation: spin 0.8s linear infinite;
}

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

/* Footer */
footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border);
}

/* Collapse all button */
.collapse-all-bar {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.btn-collapse-all {
    font-family: inherit;
    font-size: 0.8rem;
    padding: 0.375rem 0.75rem;
    background: var(--bg-surface);
    color: var(--text-muted);
    border: 2px solid var(--border);
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.btn-collapse-all:hover {
    background: var(--bg-page);
    color: var(--text-main);
    border-color: var(--border-strong);
}

/* 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;
        gap: 1rem;
        text-align: center;
    }

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

    h1 {
        font-size: 1.5rem;
        flex-direction: column;
        gap: 0.5rem;
    }

    .header-logo {
        height: 60px;
    }

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

    .pdf-badge {
        width: 100%;
        font-size: 0.75rem;
    }

    .section-header {
        padding: 0.625rem 0.75rem;
    }

    .section-header h2 {
        font-size: 1.1rem;
    }

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

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

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

    .search-container {
        margin-bottom: 1.25rem;
    }

    .search-wrapper {
        padding: 0.625rem 0.75rem;
    }

    .search-icon {
        font-size: 1rem;
        margin-right: 0.5rem;
    }

    .search-wrapper input {
        font-size: 0.875rem;
    }

    .search-wrapper input::placeholder {
        font-size: 0.8rem;
    }

    .search-clear {
        font-size: 0.875rem;
        padding: 0.25rem 0.375rem;
    }

    .search-info {
        margin-top: 0.5rem;
        font-size: 0.75rem;
        flex-wrap: wrap;
    }
}