*{
  margin: 0;
  padding: 0;
  border-radius: 5px;
  box-sizing: border-box;
}
body{
  height: 100vh;
  display: flex;
  align-items: center;
  text-align: center;
  font-family: sans-serif;
  justify-content: center;
  background-color: #6495ED;
  background-size: cover;
  background-position: center;
}
.container{
  position: relative;
  width: 400px;
  background: aliceblue;
  padding: 20px 20px;
  border-radius: 30px;
}

.judul{
  margin: 10px 15px 10px 15px;
  padding: 10px 0px 10px 0px;
  text-align: center;
  font-size: 10px;
}
.input-field, form .button{
  margin: 25px 0;
  position: relative;
  height: 50px;
  width: 100%;
}
.input-field input{
  height: 100%;
  width: 100%;
  border: 1px solid silver;
  border-radius: 20px;
  padding-left: 15px;
  outline: none;
  font-size: 19px;
  transition: .4s;
}
input:focus{
  border: 1px solid #1DA1F2;
}
.input-field label, span.show{
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}
.input-field label{
  left: 30px;
  pointer-events: none;
  color: grey;
  font-size: 18px;
  transition: .4s;
}
span.show{
  right: 20px;
  color: #111;
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
  user-select: none;
  visibility: hidden;
  font-family: 'Open Sans', sans-serif;
}
input:valid ~ span.show{
  visibility: visible;
}
input:focus ~ label,
input:valid ~ label{
  transform: translateY(-33px);
  background:  aliceblue;
  font-size: 16px;
  color: #1DA1F2;
}
form .button{
  margin-top: 30px;
  overflow: hidden;
  z-index: 111;
  border-radius: 50px;
}
.button .inner{
  position: absolute;
  height: 100%;
  width: 300%;
  left: -100%;
  z-index: -1;
  transition: all .4s;
  background: -webkit-linear-gradient(right,#00dbde,#fc00ff,#00dbde,#fc00ff);
}
.button:hover .inner{
  left: 0;
}
.button button{
  width: 100%;
  height: 100%;
  border: none;
  background: none;
  outline: none;
  color: white;
  font-size: 20px;
  cursor: pointer;
  font-family: 'Montserrat', sans-serif;
}