CSS Show Hide Password

@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,300);
body {
  font-family: 'Open Sans', sans-serif;
  background: #f2f5f7;
}

h1 {
  font-weight: 400;
  text-align: center;
  color: #2D3E50;
}

.kotak {
  background: #1BBC9D;
  width: 500px;
  padding: 60px 40px;
  color: #fff;
  margin: 10px auto;
  box-shadow: 2px 2px 4px 0 #ccc;
}

.form-password {
  width: 93%;
  padding: 10px 15px;
  font-size: 14pt;
  border: none;
  color: #2D3E50;
}

.form-submit {
  padding: 10px 15px;
  background: transparent;
  border: 2px solid #fff;
  color: #fff;
  font-size: 12pt;
}