1button {
2  padding: 10px 20px;
3  text-transform: uppercase;
4  border-radius: 8px;
5  font-size: 17px;
6  font-weight: 500;
7  color: #ffffff80;
8  text-shadow: none;
9  background: transparent;
10  box-shadow: transparent;
11  border: 1px solid #ffffff80;
12  transition: 0.5s ease;
13  user-select: none;
14}
15
16#btn:hover,:focus {
17  color: #ffffff;
18  background: #008cff;
19  border: 1px solid #008cff;
20  text-shadow: 0 0 5px #ffffff,
21              0 0 10px #ffffff,
22              0 0 20px #ffffff;
23  box-shadow: 0 0 5px #008cff,
24              0 0 20px #008cff,
25              0 0 50px #008cff,
26              0 0 100px #008cff;
27}