Add active and hover transitions to text inputs and buttons

[nihey]

input borders and button borders are now more transparent, on hover:

Borders become fully visible once active or focused:

[BrOrlandi]

I don't like the Play button starts as transparent, this effect hide the button. I prefer something like glow effect to highlight the button. Glow it's not the best effect, but in the theme of Star Wars it fits well.