Black Login

I was just about to play minecraf.
I opened, the Minecraft Launcher, But the Launcher wasn't as i normally is.
The dirt surrounding the Username and Password, was black.
I couldn't tell know what difference it made, and typed in my username and password, (correctly) and then some red text pops up
"Can't connect to minecraft.net"
(don't worry, i have seen this many times before) i hit "Try Again", check my username and password, and hit Login again, and the same thing pops up, i do it again... and again.. the same thing happens,
over and over and over and over again.
I don't know what caused the problem, and i don't know how to fix it.
I hope somebody knows whats going on, and how to fix it.

Because it's really terrible, that i haven't been able to play minecraft for a month now