/* CSS Variables */
:root {
    --color-primary: #2d5016;
    --color-primary-dark: #1e3a0f;
    --color-primary-light: #4a7c24;
    --color-secondary: #8bc34a;
    --color-accent: #ff9800;
    --color-background: #f9faf8;
    --color-surface: #ffffff;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #e0e0e0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

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

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-background);
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary-light);
    text-decoration: underline;
}

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

/* Header */
.site-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.site-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.tagline {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Navigation */
.main-nav {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.main-nav ul {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    list-style: none;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) 0;
}

.main-nav a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease, color 0.2s ease;
}

.main-nav a:hover {
    background-color: var(--color-secondary);
    color: var(--color-primary-dark);
    text-decoration: none;
}

/* Main Content */
main {
    padding: var(--spacing-xl) 0;
}

/* Content Sections */
.content-section {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.content-section h2 {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--color-secondary);
}

.content-section h3 {
    font-size: 1.4rem;
    color: var(--color-primary-dark);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.content-section h4 {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.content-section p {
    margin-bottom: var(--spacing-sm);
}

.content-section ul, .content-section ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.content-section li {
    margin-bottom: var(--spacing-xs);
}

/* Highlight Box */
.highlight-box {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
}

.highlight-box h3 {
    margin-top: 0;
    color: var(--color-primary-dark);
}

/* Tip Box */
.tip-box {
    background-color: #fff3e0;
    border-left: 4px solid var(--color-accent);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
}

/* Benefits Grid */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.benefit-card {
    background: linear-gradient(135deg, #f1f8e9 0%, #dcedc8 100%);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-secondary);
}

.benefit-card h3 {
    color: var(--color-primary);
    margin-top: 0;
    font-size: 1.2rem;
}

/* Equipment Items */
.equipment-item {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.equipment-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

/* Data Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
    font-size: 0.95rem;
}

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

.data-table th {
    background-color: var(--color-primary);
    color: white;
    font-weight: 600;
}

.data-table tr:nth-child(even) {
    background-color: #f5f5f5;
}

.data-table tr:hover {
    background-color: #e8f5e9;
}

/* Steps */
.step {
    background-color: #fafafa;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--color-secondary);
}

.step h3 {
    color: var(--color-primary);
    margin-top: 0;
}

/* Problem Items */
.problem-item {
    background-color: #fff8f8;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid #e57373;
}

.problem-item h3 {
    color: #c62828;
    margin-top: 0;
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.product-card {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.product-card h3 {
    color: var(--color-accent);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0;
    margin-bottom: var(--spacing-xs);
}

.product-card h4 {
    color: var(--color-primary-dark);
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.product-card p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.product-link {
    display: inline-block;
    background-color: var(--color-accent);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: background-color 0.2s ease;
}

.product-link:hover {
    background-color: #e68a00;
    color: white;
    text-decoration: none;
}

/* Checklist */
.checklist {
    columns: 2;
    column-gap: var(--spacing-xl);
}

.checklist h3 {
    color: var(--color-primary);
    margin-top: var(--spacing-md);
    break-after: avoid;
}

.checklist h3:first-child {
    margin-top: 0;
}

.checklist ul {
    break-inside: avoid;
    margin-bottom: var(--spacing-md);
}

.checklist li {
    position: relative;
    padding-left: var(--spacing-md);
    list-style: none;
}

.checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: bold;
}

/* Footer */
.site-footer {
    background-color: var(--color-primary-dark);
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-top: var(--spacing-xl);
}

.site-footer p {
    margin-bottom: var(--spacing-xs);
}

.affiliate-disclosure {
    font-size: 0.85rem;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .site-header h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: center;
    }

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

    .content-section h2 {
        font-size: 1.5rem;
    }

    .data-table {
        font-size: 0.85rem;
    }

    .data-table th,
    .data-table td {
        padding: var(--spacing-xs);
    }

    .checklist {
        columns: 1;
    }

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

@media (max-width: 480px) {
    .site-header {
        padding: var(--spacing-lg) 0;
    }

    .site-header h1 {
        font-size: 1.6rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .data-table {
        display: block;
        overflow-x: auto;
    }
}

/* Print Styles */
@media print {
    .main-nav {
        display: none;
    }

    .content-section {
        box-shadow: none;
        break-inside: avoid;
    }

    a {
        color: var(--color-text);
    }

    .product-link {
        display: none;
    }
}