:root {
    --primary: #1a5276;
    --primary-dark: #0e3a56;
    --accent: #e67e22;
    --text: #333;
    --text-light: #666;
    --bg: #fff;
    --bg-light: #f8f9fa;
    --border: #dee2e6;
    --max-width: 1200px;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg);
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

header {
    background: var(--primary);
    color: #fff;
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
}

header .logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
}

header .logo:hover { color: var(--accent); }

nav { display: flex; gap: 0; flex-wrap: wrap; }

nav a {
    color: rgba(255,255,255,0.85);
    padding: 20px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.2s, color 0.2s;
    border-bottom: 3px solid transparent;
}

nav a:hover {
    color: #fff;
    background: rgba(255,255,255,0.1);
    border-bottom-color: var(--accent);
}

main { min-height: 60vh; }

.page-header {
    background: var(--primary);
    color: #fff;
    padding: 48px 0 40px;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 700;
}

.content-section {
    padding: 48px 0;
}

.content-section:nth-child(even) {
    background: var(--bg-light);
}

.content-section h2 {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

.content-section p {
    margin-bottom: 16px;
    color: var(--text-light);
}

.content-section ul {
    list-style: none;
    padding: 0;
}

.content-section ul li {
    padding: 8px 0 8px 24px;
    position: relative;
    color: var(--text-light);
}

.content-section ul li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

.product-grid, .category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 24px;
}

.product-card, .category-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 24px;
    transition: box-shadow 0.2s, transform 0.2s;
}

.product-card:hover, .category-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.product-card h3, .category-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.product-card h3 a, .category-card h3 a {
    color: var(--primary);
}

.product-card p, .category-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 12px;
}

.product-card .btn, .category-card .btn {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary);
    color: #fff;
    border-radius: 4px;
    font-size: 0.85rem;
    transition: background 0.2s;
}

.product-card .btn:hover, .category-card .btn:hover {
    background: var(--accent);
    color: #fff;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 24px;
}

.contact-block h2 {
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.contact-block ul {
    list-style: none;
    padding: 0;
}

.contact-block ul li {
    padding: 6px 0;
    color: var(--text-light);
}

.download-section {
    background: var(--primary);
    color: #fff;
    padding: 32px;
    border-radius: 8px;
    margin-top: 24px;
    text-align: center;
}

.download-section a {
    display: inline-block;
    padding: 12px 32px;
    background: var(--accent);
    color: #fff;
    border-radius: 4px;
    font-weight: 600;
    margin-top: 16px;
    transition: background 0.2s;
}

.download-section a:hover {
    background: #d35400;
    color: #fff;
}

footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.7);
    padding: 32px 0;
    text-align: center;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    header .container { flex-direction: column; }
    nav { justify-content: center; }
    nav a { padding: 12px 10px; font-size: 0.8rem; }
    .page-header h1 { font-size: 1.5rem; }
    .product-grid, .category-grid { grid-template-columns: 1fr; }
}