Add a costumized CSS without alter CSS core

Hi guys. Sorry for my bad english. I am noob in plugin development. Just that, I am developing a plugin with Material Desing CSS. This plugin works on The Wire but my problem is I need use this CSS just in The Wire. When I load this CSS, this modify a lot of tag like a, h1, h2, of ELGG CSS core. There a way to load the css only on the wire?