JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
      <a href="#" class="ui-download-btn">Download marketing  kit </a>

</body>
</html>

CSS

@import url("https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&display=swap");

button,
input,
input::-webkit-input-placeholder,
a {
  font-family: "Open Sans", sans-serif;
}

.ui-download-btn {
  position: relative;
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  min-width: 222px;
  min-height: 61px;
  text-decoration: none;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  font-weight: 600;
  font-size: 14.4828px;
  line-height: 20px;
  text-align: center;
  color: #838383;
  border-radius: 12px;
  overflow: hidden;
  outline: none;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}

.ui-download-btn:visited {
  color: #838383;
}

.ui-download-btn::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(108.71deg, rgba(239, 239, 239, 0.5) 39.22%, rgba(255, 255, 255, 0) 90.31%);
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}

.ui-download-btn::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(108.71deg, rgba(196, 200, 215, 0.5) 39.22%, rgba(255, 255, 255, 0) 90.31%);
  opacity: 0;
  visibility: hidden;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}

.ui-download-btn:hover::before, .ui-download-btn:focus::before {
  opacity: 0;
  visibility: hidden;
}

.ui-download-btn:hover::after, .ui-download-btn:focus::after {
  opacity: 1;
  visibility: visible;
}