1.installer {
2  width: 200px;
3  height: 40px;
4}
5
6.installer label {
7  position: absolute;
8  height: 40px;
9  width: 200px;
10  border-radius: 5px;
11  overflow: hidden;
12  cursor: pointer;
13}
14
15.installer label input {
16  display: none;
17}
18
19.installer label span {
20  position: absolute;
21  height: 40px;
22  width: 200px;
23  line-height: 40px;
24  text-align: center;
25  color: #fff;
26  background: #3F8EFC;
27  border-radius: 5px;
28}
29
30.installer label input:checked ~ span {
31  background: #87E544;
32  animation: downloadSuccess 3.1s ease;
33}
34
35.installer label span:after {
36  content: 'DOWNLOAD';
37  position: absolute;
38  width: 80%;
39  height: 100%;
40  left: 10%;
41}
42
43.installer label input:checked ~ span:after {
44  content: 'Thank you!';
45  animation: downloadState 3s;
46}
47
48.installer label span:before {
49  content: '';
50  position: absolute;
51  width: 100%;
52  height: 100%;
53  top: 0px;
54  left: 0px;
55  opacity: 0;
56  background: rgba(255,255,255,.2);
57}
58
59.installer label input:checked ~ span:before {
60  animation: downloadProgress 3s cubic-bezier(.67,.13,.1,.81);
61}
62
63@keyframes downloadSuccess {
64  0%, 90% {
65    background: #3F8EFC;
66  }
67
68  100% {
69    background: #87E544;
70  }
71}
72
73@keyframes downloadState {
74  0%, 95% {
75    content: 'DOWNLOADING...'
76  }
77
78  100% {
79    content: 'Thank you for download!'
80  }
81}
82
83@keyframes downloadProgress {
84  0% {
85    width: 5%;
86    opacity: 1;
87  }
88
89  35% {
90    width: 17%;
91  }
92
93  64% {
94    width: 51%;
95  }
96
97  81% {
98    width: 70%;
99  }
100
101  90% {
102    width: 86%;
103    opacity: 1;
104  }
105
106  100% {
107    width: 100%;
108    opacity: 0;
109  }
110}