/* Reset and Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-secondary: #10b981;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f9fafb;
    --color-border: #e5e7eb;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --container-width: 1200px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.site-header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.logo {
    text-decoration: none;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.main-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.main-nav a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.main-nav a:hover {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.hero p {
    font-size: 1.125rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

/* Stats */
.stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-lg);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* Search and Filters */
.search-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-alt);
}

.search-box {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 600px;
    margin: 0 auto;
}

.search-box input {
    flex: 1;
    padding: var(--spacing-md);
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color 0.2s;
}

.search-box input:focus {
    border-color: var(--color-primary);
}

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    justify-content: center;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

/* Product Grid */
.products-section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.view-all {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

/* Product Card */
.product-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.2s;
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.product-image {
    aspect-ratio: 4/3;
    background: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-image-placeholder {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.product-content {
    padding: var(--spacing-md);
}

.product-brand {
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.product-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.product-stats {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.product-stat {
    text-align: center;
}

.product-stat-value {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-primary);
}

.product-stat-label {
    font-size: 0.7rem;
    color: var(--color-text-light);
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    padding: 2px 8px;
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    background: var(--color-bg-alt);
    color: var(--color-text-light);
}

.tag.protein-dense {
    background: #dcfce7;
    color: #166534;
}

.tag.low-sugar {
    background: #fef3c7;
    color: #92400e;
}

.tag.keto-friendly {
    background: #dbeafe;
    color: #1e40af;
}

.tag.high-fiber {
    background: #f3e8ff;
    color: #6b21a8;
}

/* Category Cards */
.categories-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-alt);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.category-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    text-decoration: none;
    color: var(--color-text);
    transition: all 0.2s;
}

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

.category-name {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.category-count {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* Footer */
.site-footer {
    background: var(--color-text);
    color: #9ca3af;
    padding: var(--spacing-xl) 0;
    text-align: center;
    font-size: 0.875rem;
}

.site-footer a {
    color: #d1d5db;
}

/* Comparison Tool */
.compare-section {
    padding: var(--spacing-xl) 0;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-lg);
}

.compare-table th,
.compare-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.compare-table th {
    background: var(--color-bg-alt);
    font-weight: 600;
}

.compare-table .winner {
    background: #dcfce7;
    color: #166534;
    font-weight: 600;
}

/* Single Product Page */
.product-detail {
    padding: var(--spacing-xl) 0;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

.product-detail-image {
    aspect-ratio: 1;
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-detail-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.nutrition-table {
    width: 100%;
    margin-top: var(--spacing-lg);
}

.nutrition-table tr {
    border-bottom: 1px solid var(--color-border);
}

.nutrition-table th,
.nutrition-table td {
    padding: var(--spacing-sm) 0;
}

.nutrition-table th {
    text-align: left;
    font-weight: 500;
}

.nutrition-table td {
    text-align: right;
    font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .main-nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .stats {
        flex-wrap: wrap;
        gap: var(--spacing-lg);
    }

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