1.pinwheel {
2  --uib-size: 45px;
3  --uib-speed: 0.8s;
4  --uib-color: #312f2b;
5  --uib-line-weight: 4px;
6  position: relative;
7  display: flex;
8  align-items: center;
9  justify-content: center;
10  height: var(--uib-size);
11  width: var(--uib-size);
12}
13
14.pinwheel__line {
15  position: absolute;
16  top: calc(50% - var(--uib-line-weight) / 2);
17  left: 0;
18  height: var(--uib-line-weight);
19  width: 100%;
20  border-radius: calc(var(--uib-line-weight) / 2);
21  background-color: var(--uib-color);
22  animation: rotate81232 var(--uib-speed) ease-in-out infinite;
23}
24
25.pinwheel__line:nth-child(2) {
26  animation-delay: calc(var(--uib-speed) * 0.075);
27  opacity: 0.8;
28}
29
30.pinwheel__line:nth-child(3) {
31  animation-delay: calc(var(--uib-speed) * 0.15);
32  opacity: 0.6;
33}
34
35.pinwheel__line:nth-child(4) {
36  animation-delay: calc(var(--uib-speed) * 0.225);
37  opacity: 0.4;
38}
39
40.pinwheel__line:nth-child(5) {
41  animation-delay: calc(var(--uib-speed) * 0.3);
42  opacity: 0.2;
43}
44
45.pinwheel__line:nth-child(6) {
46  animation-delay: calc(var(--uib-speed) * 0.375);
47  opacity: 0.1;
48}
49
50@keyframes rotate81232 {
51  0% {
52    transform: rotate(0deg);
53  }
54
55  100% {
56    transform: rotate(180deg);
57  }
58}
59