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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #ffffff;
}

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

/* Header */
.header {
    background: #1a237e;
    color: white;
    padding: 1rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.nav-brand p {
    font-size: 0.9rem;
    opacity: 0.8;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

.cart-btn {
    background: #2196f3;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.3s;
}

.cart-btn:hover {
    background: #1976d2;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1a237e 0%, #2196f3 100%);
    color: white;
    padding: 120px 0 80px;
    display: flex;
    align-items: center;
    min-height: 100vh;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    margin-left: 5%;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.6;
}

.cta-btn {
    background: white;
    color: #1a237e;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 5%;
}

.quantum-animation {
    position: relative;
    width: 300px;
    height: 300px;
}

.circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    position: absolute;
    border: 3px solid #64b5f6;
    background: linear-gradient(135deg, #1a237e 0%, #2196f3 100%);
    animation: float 3s ease-in-out infinite;
}

.circle-1 {
    top: 50px;
    left: 50px;
    animation-delay: 0s;
}

.circle-2 {
    top: 50px;
    right: 50px;
    background: linear-gradient(135deg, #2196f3 0%, #64b5f6 100%);
    animation-delay: 1.5s;
}

.connection-line {
    position: absolute;
    top: 100px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, #1a237e 0%, #2196f3 50%, #64b5f6 100%);
    border-radius: 2px;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Products Section */
.products {
    padding: 80px 0;
    background: #f8f9fa;
}

.products h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1a237e;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.product-image {
    width: 100%;
    height: 300px;
    overflow: hidden;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #1a237e;
}

.product-info p {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.product-options {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.product-options select {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 0.9rem;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a237e;
    margin-bottom: 1rem;
}

.add-to-cart {
    width: 100%;
    background: #2196f3;
    color: white;
    border: none;
    padding: 0.75rem;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.add-to-cart:hover {
    background: #1976d2;
}

/* About Section */
.about {
    padding: 80px 0;
    background: white;
}

.about h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #1a237e;
}

.about p {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    text-align: center;
    padding: 2rem;
    border-radius: 10px;
    background: #f8f9fa;
}

.feature h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1a237e;
}

.feature p {
    color: #666;
    line-height: 1.6;
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background: #f8f9fa;
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1a237e;
}

.contact p {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 3rem;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.contact-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.contact-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #1a237e;
}

.contact-item p {
    color: #666;
    font-size: 1rem;
}

/* Cart Modal */
.cart-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
}

.cart-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.cart-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
}

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
}

.cart-header h2 {
    color: #1a237e;
    font-size: 1.5rem;
}

.close-cart {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: #666;
}

.cart-items {
    padding: 1.5rem;
    max-height: 400px;
    overflow-y: auto;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid #eee;
}

.cart-item:last-child {
    border-bottom: none;
}

.cart-item-info h4 {
    color: #1a237e;
    margin-bottom: 0.25rem;
}

.cart-item-info p {
    color: #666;
    font-size: 0.9rem;
}

.cart-item-price {
    font-weight: 600;
    color: #1a237e;
}

.remove-item {
    background: #f44336;
    color: white;
    border: none;
    padding: 0.25rem 0.5rem;
    border-radius: 3px;
    cursor: pointer;
    font-size: 0.8rem;
}

.cart-footer {
    padding: 1.5rem;
    border-top: 1px solid #eee;
    background: #f8f9fa;
}

.cart-total {
    text-align: center;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.checkout-btn {
    width: 100%;
    background: #1a237e;
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.checkout-btn:hover {
    background: #0d47a1;
}

/* Footer */
.footer {
    background: #1a237e;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

.footer p {
    margin-bottom: 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 100px 0 60px;
    }
    
    .hero-content {
        margin-left: 0;
        margin-bottom: 2rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-visual {
        margin-right: 0;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .products h2,
    .about h2,
    .contact h2 {
        font-size: 2rem;
    }
    
    .product-options {
        flex-direction: column;
    }
}