1.button {
2  --primary-color: #000;
3  --secondary-color: #fff;
4  --border-color: #000;
5  background-color: var(--primary-color);
6  border: 2px solid var(--border-color);
7  color: var(--secondary-color);
8  padding: 10px 20px;
9  font-size: 18px;
10  font-weight: bold;
11  border-radius: 50px;
12  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
13  position: relative;
14  overflow: hidden;
15  z-index: 1;
16  transition: all 0.3s ease-in-out;
17}
18
19.button::before {
20  content: "";
21  display: block;
22  position: absolute;
23  top: -100%;
24  left: 50%;
25  width: 150%;
26  height: 150%;
27  background-color: var(--secondary-color);
28  border-radius: 50%;
29  transform: translate(-50%, 0) scale(0);
30  z-index: -1;
31  transition: all 0.3s ease-in-out;
32}
33
34.button:hover {
35  background-color: var(--secondary-color);
36  color: var(--primary-color);
37  transform: translateY(-5px);
38  box-shadow: 0 15px 20px rgba(0, 0, 0, 0.2);
39}
40
41.button:hover::before {
42  transform: translate(-50%, -50%) scale(2);
43}
44
45.button:active {
46  transform: translateY(0);
47  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
48}
49