1.btn {
2  font-size: 16px;
3  font-family: monospace;
4  color: white;
5  border-radius: 8px;
6  letter-spacing: 5px;
7  font-weight: 800;
8  text-transform: uppercase;
9  transition: 0.6s;
10  padding: 10px 20px;
11  border: none;
12  transition-property: box-shadow;
13}
14
15.btn {
16  background: #765ab5;
17  box-shadow: 0 0 50px #765ab5;
18}
19
20.btn:hover {
21  box-shadow: 0 0 5px #765ab5,
22              0 0 25px #352552,
23              0 0 50px #352552,
24              0 0 100px #765ab5,
25              0 0 500px #765ab5;
26}