1 
2<button type="button" class="button">
3  <span class="button__text">Download</span>
4  <span class="button__icon"><svg class="svg" data-name="Layer 2" id="bdd05811-e15d-428c-bb53-8661459f9307" viewBox="0 0 35 35" xmlns="http://www.w3.org/2000/svg"><path d="M17.5,22.131a1.249,1.249,0,0,1-1.25-1.25V2.187a1.25,1.25,0,0,1,2.5,0V20.881A1.25,1.25,0,0,1,17.5,22.131Z"></path><path d="M17.5,22.693a3.189,3.189,0,0,1-2.262-.936L8.487,15.006a1.249,1.249,0,0,1,1.767-1.767l6.751,6.751a.7.7,0,0,0,.99,0l6.751-6.751a1.25,1.25,0,0,1,1.768,1.767l-6.752,6.751A3.191,3.191,0,0,1,17.5,22.693Z"></path><path d="M31.436,34.063H3.564A3.318,3.318,0,0,1,.25,30.749V22.011a1.25,1.25,0,0,1,2.5,0v8.738a.815.815,0,0,0,.814.814H31.436a.815.815,0,0,0,.814-.814V22.011a1.25,1.25,0,1,1,2.5,0v8.738A3.318,3.318,0,0,1,31.436,34.063Z"></path></svg></span>
5</button>          

 1 
 2.button {
 3  --main-focus: #2d8cf0;
 4  --font-color: #dedede;
 5  --bg-color-sub: #222;
 6  --bg-color: #323232;
 7  --main-color: #dedede;
 8  position: relative;
 9  width: 150px;
10  height: 40px;
11  cursor: pointer;
12  display: flex;
13  align-items: center;
14  border: 2px solid var(--main-color);
15  box-shadow: 4px 4px var(--main-color);
16  background-color: var(--bg-color);
17  border-radius: 10px;
18  overflow: hidden;
19}
20 
21.button, .button__icon, .button__text {
22  transition: all 0.3s;
23}
24 
25.button .button__text {
26  transform: translateX(21px);
27  color: var(--font-color);
28  font-weight: 600;
29}
30 
31.button .button__icon {
32  position: absolute;
33  transform: translateX(109px);
34  height: 100%;
35  width: 39px;
36  background-color: var(--bg-color-sub);
37  display: flex;
38  align-items: center;
39  justify-content: center;
40}
41 
42.button .svg {
43  width: 20px;
44  fill: var(--main-color);
45}
46 
47.button:hover {
48  background: var(--bg-color);
49}
50 
51.button:hover .button__text {
52  color: transparent;
53}
54 
55.button:hover .button__icon {
56  width: 148px;
57  transform: translateX(0);
58}
59 
60.button:active {
61  transform: translate(3px, 3px);
62  box-shadow: 0px 0px var(--main-color);
63}