Hi. I'm sorry about my bad english... hope you can understand what I'm trying to say... =)

I'm trying to install the Salient theme, but when the wordpress finish the upload, I just recive this error message:

"The package could not be installed. The theme is missing the <code>style.css</code> stylesheet.", as you can see on the image attached...

I'm sorry if this is a stupid question, but I really don't know anything about built a site... 

Can anyone help me?