Why can't I style the button?

1. Reason to reach for the button "Calculate" using css(
2. Referring to the example of my proektika show you how to connect to animate.css? I want to animate that appears by clicking on the button.
3. When aiming to repaint a black square to select the color when you hover.
Thank you in advance for your help! :))
July 9th 19 at 10:52
1 answer
July 9th 19 at 10:55
The button styles a colon forgot.
button {
 width: 140px;
 height: 140px;

table tr:hover select {
 background: white;
 transition: .2s linear;
 color: black;


Animate Pro XS)

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