-- Product variants table
CREATE TABLE product_variants (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    product_id UUID NOT NULL REFERENCES products(id) ON DELETE CASCADE,
    name VARCHAR(255) NOT NULL,
    price_modifier DECIMAL(10,2) DEFAULT 0.00,
    metadata JSONB DEFAULT '{}',
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Indexes
CREATE INDEX idx_product_variants_product_id ON product_variants(product_id);
CREATE INDEX idx_product_variants_created_at ON product_variants(created_at);