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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

/* Top Bar */
.top-bar {
    background: #1a1a1a;
    color: white;
    padding: 12px 0;
    text-align: center;
    font-size: 14px;
}

.top-bar a {
    color: #4CAF50;
    text-decoration: none;
    font-weight: bold;
}

/* Header */
header {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-size: 28px;
    font-weight: 700;
    color: #2c3e50;
    letter-spacing: -0.5px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 35px;
}

nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 16px;
    transition: color 0.3s;
    padding: 5px 0;
}

nav a:hover {
    color: #4CAF50;
}

.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    border-radius: 4px;
    padding: 10px 0;
    margin-top: 10px;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content a {
    display: block;
    padding: 12px 20px;
    color: #555;
    font-size: 15px;
}

.dropdown-content a:hover {
    background: #f8f8f8;
    color: #4CAF50;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
}

.hero-content h1 {
    font-size: 56px;
    margin-bottom: 20px;
    font-weight: 700;
    letter-spacing: -1px;
}

.hero-content p {
    font-size: 22px;
    margin-bottom: 15px;
    opacity: 0.95;
}

.hero-subtitle {
    font-size: 18px;
    opacity: 0.8;
    letter-spacing: 2px;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px;
}

/* Intro Section */
.intro {
    background: white;
    padding: 50px;
    border-radius: 8px;
    margin-bottom: 60px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.intro h2 {
    color: #2c3e50;
    margin-bottom: 25px;
    font-size: 36px;
    font-weight: 600;
}

.intro p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: #555;
    font-size: 16px;
}

/* Products Section */
.products-section {
    margin-bottom: 60px;
}

.products-section h2 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 50px;
    font-size: 42px;
    font-weight: 600;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    border-color: #4CAF50;
}

.product-header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
}

.product-header h3 {
    font-size: 28px;
    font-weight: 600;
}

.product-info {
    padding: 25px;
}

.product-info p {
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
}

.view-details {
    color: #4CAF50;
    font-weight: 600;
    display: inline-block;
    margin-top: 10px;
}

/* Info Section */
.info-section {
    background: white;
    padding: 50px;
    border-left: 5px solid #4CAF50;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.info-section h3 {
    color: #2c3e50;
    margin-bottom: 25px;
    font-size: 28px;
    font-weight: 600;
}

.info-section ul {
    list-style: none;
}

.info-section li {
    margin-bottom: 18px;
    padding-left: 30px;
    position: relative;
    line-height: 1.6;
    color: #555;
}

.info-section li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #4CAF50;
    font-size: 20px;
    font-weight: bold;
}

/* Product Detail Page */
.product-detail {
    background: white;
    padding: 50px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.back-btn {
    background: #f5f5f5;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
    color: #333;
    margin-bottom: 30px;
    transition: background 0.3s;
}

.back-btn:hover {
    background: #e0e0e0;
}

.product-detail-header {
    border-bottom: 3px solid #4CAF50;
    padding-bottom: 20px;
    margin-bottom: 40px;
}

.product-detail-header h1 {
    color: #2c3e50;
    font-size: 42px;
    font-weight: 600;
}

.product-detail-content {
    display: grid;
    gap: 40px;
}

.product-description,
.product-types,
.product-specs {
    padding: 30px;
    background: #f9f9f9;
    border-radius: 6px;
}

.product-detail-content h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 24px;
    font-weight: 600;
}

.product-detail-content p {
    line-height: 1.8;
    color: #555;
}

.product-detail-content ul {
    list-style: none;
    padding-left: 0;
}

.product-detail-content li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: #555;
    border-bottom: 1px solid #e0e0e0;
}

.product-detail-content li:last-child {
    border-bottom: none;
}

.product-detail-content li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: #4CAF50;
    font-weight: bold;
}

.order-info {
    background: #e8f5e9;
    padding: 30px;
    border-radius: 6px;
    border-left: 5px solid #4CAF50;
}

.order-info h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 24px;
}

.info-box {
    background: white;
    padding: 25px;
    border-radius: 6px;
}

.info-box p {
    margin-bottom: 12px;
    line-height: 1.8;
    color: #555;
    font-size: 15px;
}

.info-box p:last-child {
    margin-bottom: 0;
}

/* About Page */
.about-content {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    padding: 50px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.about-content h2 {
    color: #2c3e50;
    margin-bottom: 30px;
    font-size: 42px;
    font-weight: 600;
}

.about-content h3 {
    color: #2c3e50;
    margin: 30px 0 20px;
    font-size: 28px;
    font-weight: 600;
}

.about-content p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: #555;
}

.about-list {
    list-style: none;
    padding-left: 0;
}

.about-list li {
    margin-bottom: 15px;
    padding-left: 30px;
    position: relative;
    line-height: 1.6;
    color: #555;
}

.about-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #4CAF50;
    font-weight: bold;
    font-size: 18px;
}

/* Contact Page */
.page-title {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 42px;
    font-weight: 600;
}

.page-subtitle {
    text-align: center;
    margin-bottom: 50px;
    font-size: 18px;
    color: #666;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.contact-box {
    background: white;
    padding: 35px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: transform 0.3s;
}

.contact-box:hover {
    transform: translateY(-3px);
}

.contact-box h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 22px;
    font-weight: 600;
}

.contact-box p {
    margin-bottom: 10px;
    color: #555;
    line-height: 1.6;
}

.contact-box a {
    color: #4CAF50;
    text-decoration: none;
    font-weight: 500;
}

.contact-box a:hover {
    text-decoration: underline;
}

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

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: #4CAF50;
    margin-bottom: 20px;
    font-size: 20px;
    font-weight: 600;
}

.footer-section p,
.footer-section a {
    color: #ccc;
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    line-height: 1.6;
}

.footer-section a:hover {
    color: #4CAF50;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
    color: #888;
}

/* Page Content */
.page-content {
    display: none;
}

.page-content.active {
    display: block;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #333;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 18px;
    }

    nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    }

    nav.active {
        display: block;
    }

    nav ul {
        flex-direction: column;
        gap: 0;
    }

    nav a {
        display: block;
        padding: 15px 20px;
        border-bottom: 1px solid #eee;
    }

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

    .products-grid {
        grid-template-columns: 1fr;
    }

    .dropdown-content {
        position: static;
        box-shadow: none;
        padding-left: 20px;
        margin-top: 0;
        background: #f8f8f8;
    }

    .intro,
    .product-detail,
    .about-content,
    .info-section {
        padding: 30px 20px;
    }

    .container {
        padding: 40px 15px;
    }

    .products-section h2,
    .page-title,
    .about-content h2,
    .product-detail-header h1 {
        font-size: 32px;
    }
}