.store-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
}

.store-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid #00d4ff;
}

.store-header h1 {
    color: #00d4ff;
    margin-bottom: 1rem;
}

.store-header p {
    color: #999;
    font-size: 1.1rem;
}

.product-categories {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.category-filter {
    padding: 0.75rem 1.5rem;
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid #333;
    color: #e0e6ed;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.category-filter:hover,
.category-filter.active {
    background: rgba(0, 212, 255, 0.2);
    border-color: #00d4ff;
    color: #00d4ff;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.product-card {
    background: rgba(0, 0, 0, 0.7);
    border-radius: 10px;
    border: 1px solid #333;
    overflow: hidden;
    transition: all 0.3s ease;
}

.product-card:hover {
    border-color: #00d4ff;
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.2);
}

.product-image {
    background: linear-gradient(45deg, #00d4ff, #9d4edd);
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    color: #e0e6ed;
    margin: 0 0 1rem 0;
}

.product-info p {
    color: #999;
    margin: 0 0 1.5rem 0;
    line-height: 1.5;
}

.product-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: #00d4ff;
    margin-bottom: 1rem;
}

.buy-btn {
    width: 100%;
    padding: 0.75rem;
    background: linear-gradient(45deg, #00d4ff, #9d4edd);
    border: none;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.buy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

.cart-sidebar {
    position: fixed;
    right: -300px;
    top: 0;
    width: 300px;
    height: 100vh;
    background: rgba(0, 0, 0, 0.95);
    border-left: 2px solid #00d4ff;
    padding: 2rem;
    transition: right 0.3s ease;
    z-index: 1000;
}

.cart-sidebar.open {
    right: 0;
}

.cart-sidebar h3 {
    color: #00d4ff;
    margin-bottom: 1.5rem;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid #333;
}

.cart-item button {
    background: #ff4757;
    border: none;
    color: white;
    width: 25px;
    height: 25px;
    border-radius: 50%;
    cursor: pointer;
}

.cart-total {
    margin: 2rem 0;
    padding: 1rem;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 5px;
    text-align: center;
}

.checkout-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(45deg, #00ff88, #00d4ff);
    border: none;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .product-categories {
        flex-direction: column;
        align-items: center;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .cart-sidebar {
        width: 100%;
        right: -100%;
    }
}