1button {
2  width: 60px;
3  height: 60px;
4  bottom: 40px;
5  right: 40px;
6  background-color: #004dff;
7  color: #FFF;
8  border-radius: 50px;
9  text-align: center;
10  font-size: 30px;
11  box-shadow: 2px 2px 3px #999;
12  z-index: 100;
13  border: #004dff;
14  transition: 0.5s;
15}
16
17button:hover {
18  transform: scale(1.1);
19}
20
21button:active {
22  background-color: #020cd1;
23}
24
25.arrow-up {
26  width: 0;
27  height: 0;
28  border-left: 10px solid transparent;
29  border-right: 10px solid transparent;
30  margin-left: auto;
31  margin-right: auto;
32  margin-top: 35%;
33  margin-bottom: 60%;
34  border-bottom: 15px solid white;
35}