*{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
body {
  height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  background-color: #212121;
  font-family:arial;
}
.input {
 color: #8707ff;
 border: 2px solid #8707ff;
 border-radius: 10px;
 padding: 10px 25px;
 background: transparent;
 max-width: 190px;
}

.input:active {
 box-shadow: 2px 2px 15px #8707ff inset;
}