1/* Customize the label (the container) */
2.container {
3  display: block;
4  position: relative;
5  padding-left: 35px;
6  margin-bottom: 12px;
7  cursor: pointer;
8  font-size: 22px;
9  user-select: none;
10}
11
12/* Hide the browser's default checkbox */
13.container input {
14  position: absolute;
15  opacity: 0;
16  cursor: pointer;
17  height: 0;
18  width: 0;
19}
20
21/* Create a custom checkbox */
22.checkmark {
23  position: absolute;
24  top: 0;
25  left: 0;
26  height: 25px;
27  width: 25px;
28  background-color: #ccc;
29}
30
31/* When the checkbox is checked, add a blue background */
32.container input:checked ~ .checkmark {
33  background-color: #2196F3;
34}
35
36/* Create the checkmark/indicator (hidden when not checked) */
37.checkmark:after {
38  content: "";
39  position: absolute;
40  display: none;
41}
42
43/* Show the checkmark when checked */
44.container input:checked ~ .checkmark:after {
45  display: block;
46}
47
48/* Style the checkmark/indicator */
49.container .checkmark:after {
50  left: 9px;
51  top: 5px;
52  width: 5px;
53  height: 10px;
54  border: solid white;
55  border-width: 0 3px 3px 0;
56  transform: rotate(45deg);
57}