variable "subnets" {
  type = map(string)
  default = {
    public_a = "10.0.1.0/24"
    public_b = "10.0.2.0/24"
  }
}

resource "aws_subnet" "public" {
  for_each = var.subnets

  vpc_id            = aws_vpc.main.id
  cidr_block        = each.value
  availability_zone = each.key
}