:root {
    --primary-color: #000000;
    --secondary-color: #333333;
    --accent-color: #0066cc; /* Professional Blue */
    --bg-color: #ffffff;
    --bg-light: #f8f9fa;
    --text-color: #333333;
    --text-light: #666666;
    --border-color: #e0e0e0;
    --font-main: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --container-width: 1200px;
    --spacing-unit: 1rem;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

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

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: #fff;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    border: 1px solid var(--primary-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: #fff;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--primary-color);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Header */
header {
    background-color: #fff;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--secondary-color);
}

.nav-link:hover {
    color: var(--accent-color);
}

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

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background-color: var(--bg-light);
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Featured Categories */
.featured-categories {
    padding: 80px 0;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.category-card {
    position: relative;
    overflow: hidden;
    background-color: var(--bg-light);
    border-radius: 4px;
    transition: transform 0.3s ease;
}

.category-card:hover {
    transform: translateY(-5px);
}

.category-image {
    height: 300px;
    background-color: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #aaa;
}

.category-info {
    padding: 1.5rem;
    text-align: center;
}

.category-title {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

/* Why Choose Us / Info Section */
.info-section {
    background-color: var(--bg-light);
    padding: 80px 0;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.info-item {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.info-icon {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.info-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

/* Blog */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 40px;
    padding: 60px 0;
}

.blog-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
}

.blog-image {
    height: 200px;
    background-color: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    overflow: hidden;
    background-image: url('../images/Professional Waterproof Backpack.jpg');
    background-size: cover;
    background-position: center;
}

.blog-image i {
    display: none;
}

.blog-content {
    padding: 1.5rem;
}

.blog-date {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.blog-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.blog-excerpt {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.blog-link {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.9rem;
}

.blog-link:hover {
    text-decoration: underline;
}

/* Article Page */
.article-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 20px;
}

.article-header {
    margin-bottom: 40px;
    text-align: center;
}

.article-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 1rem;
}

.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    color: var(--primary-color);
}

.article-content h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.article-content p {
    margin-bottom: 1.5rem;
}

.article-content ul, .article-content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

/* Customization Page Specifics */
.content-block {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    padding: 20px;
    background-color: var(--bg-light);
    border-radius: 8px;
}

/* Footer */
footer {
    background-color: #1a1a1a;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: #fff;
}

.footer-col ul li {
    margin-bottom: 0.8rem;
}

.footer-col a {
    color: #aaa;
}

.footer-col a:hover {
    color: #fff;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #666;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #fff;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
}

/* Product Page */
.page-header {
    background-color: var(--bg-light);
    padding: 40px 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.catalog-container {
    display: flex;
    padding: 60px 0;
    gap: 40px;
}

.sidebar {
    width: 250px;
    flex-shrink: 0;
}

.sidebar-section {
    margin-bottom: 2rem;
}

.sidebar-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--bg-light);
    padding-bottom: 0.5rem;
}

.sidebar-list li {
    margin-bottom: 0.5rem;
}

.sidebar-list a {
    color: var(--text-color);
    font-size: 0.95rem;
}

.sidebar-list a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.product-grid {
    flex-grow: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.product-card:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.product-image {
    height: 250px;
    background-color: #f4f4f4;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ccc;
    position: relative;
}

.product-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: var(--accent-color);
    color: #fff;
    padding: 4px 8px;
    font-size: 0.8rem;
    border-radius: 2px;
}

.product-details {
    padding: 1.5rem;
}

.product-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.product-category {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.product-price {
    font-weight: 700;
    color: var(--primary-color);
}

@media (max-width: 992px) {
    .catalog-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
    }
}