Switch by JkHuger

1.ch, .ch:before, .ch:after {
2  transition: all 0.3s ease-in-out;
3}
4
5.ch {
6  background-color: rgb(27,123,145);
7  border-radius: 0.2em;
8  box-shadow: 0 0.05em 0 0.05em rgba(0,0,0,0.3) inset;
9  font-size: 20px;
10  overflow: hidden;
11  position: relative;
12  width: 3em;
13  height: 1.5em;
14  -webkit-appearance: none;
15  -moz-appearance: none;
16  appearance: none;
17  z-index: 0;
18}
19
20.ch:before, .ch:after {
21  content: "";
22  display: block;
23  position: absolute;
24}
25
26.ch:before {
27  background-color: currentColor;
28  border-radius: 0.125em;
29  box-shadow: 0 0 0 0.05em inset,
30		-0.12em -0.12em 0 rgb(109,148,184) inset,
31		-0.4em -0.3em 0 0.05em inset,
32		0.12em 0.12em 0 rgb(255,255,255) inset;
33  color: rgb(149,188,224);
34  opacity: 0.9;
35  bottom: 0;
36  left: 0.125em;
37  width: 1.25em;
38  height: 1.25em;
39  z-index: 2;
40}
41
42.ch:after {
43  background-image: /* white */radial-gradient(0.2em 0.5em at 38% 95%, rgb(255,255,255) 49%, rgba(255,255,255,0) 50%),
44		radial-gradient(0.3em 0.8em at 52% 95%, rgb(255,255,255) 49%, rgba(255,255,255,0) 50%),
45		radial-gradient(0.25em 0.4em at 67% 95%, rgb(255,255,255) 49%, rgba(255,255,255,0) 50%),
46		/* yellow */
47		radial-gradient(0.25em 0.7em at 36% 95%, rgb(255,224,0) 49%, rgba(255,224,0,0) 50%),
48		radial-gradient(0.4em 1.2em at 52% 95%, rgb(255,224,0) 49%, rgba(255,224,0,0) 50%),
49		radial-gradient(0.25em 0.6em at 70% 93%, rgb(255,224,0) 49%, rgba(255,224,0,0) 50%),
50		/* orange */
51		radial-gradient(0.3em 0.8em at 32% 81%, rgb(255,144,0) 49%, rgba(255,144,0,0) 50%),
52		radial-gradient(0.5em 1.6em at 52% 95%, rgb(255,144,0) 49%, rgba(255,144,0,0) 50%),
53		radial-gradient(0.3em 0.9em at 74% 86%, rgb(255,144,0) 49%, rgba(255,144,0,0) 50%),
54		/* red-orange */
55		radial-gradient(0.4em 1em at 25% 70%, rgb(255,76,0) 49%, rgba(255,76,0,0) 50%),
56		radial-gradient(0.7em 2.75em at 52% 100%, rgb(255,76,0) 49%, rgba(255,76,0,0) 50%),
57		radial-gradient(0.4em 1.2em at 79% 75%, rgb(255,76,0) 49%, rgba(255,76,0,0) 50%);
58  background-position: 100% 1.5em;
59  background-size: 1.5em 1.5em;
60  background-repeat: no-repeat;
61  border-radius: 0 0 0 0.1em / 0 0 0 0;
62  box-shadow: 0 0 0 0 rgb(169,208,244) inset;
63  bottom: 0;
64  left: 0;
65  width: 1.5em;
66  height: 1.5em;
67  z-index: 1;
68}
69/* Checked */
70.ch:checked {
71  background-color: rgb(92,8,8);
72}
73
74.ch:checked:before {
75  border-radius: 50%;
76  transform: translate(1.5em,1.5em) rotate(45deg) scale(0.5);
77}
78
79.ch:checked:after {
80  background-position: 100% 0;
81  box-shadow: 0 -0.15em 0 0 rgb(169,208,244) inset;
82  width: 3em;
83}
84
85/* Other States */
86.ch:focus {
87	/* Usually an anti-A11Y practice but set to remove an annoyance just for this demo */
88  outline: 0;
89}