.info, .success, .warning, .error, .validation {
border: 1px solid;
margin: 10px 0px;
padding:15px 10px 15px 50px;
background-repeat: no-repeat;
background-position: 10px center;
}
.info {
color: #00529B;
background-color: #BDE5F8;
background-image: url('../images/info.png');
}
.success {
color: #4F8A10;
background-color: #DFF2BF;
background-image:url('../images/success.png');
}
.warning {
color: #D8000C;
background-color: #FFBABA;
background-image: url('../images/error.png');
}
.error {
color: #9F6000;
background-color: #FEEFB3;
background-image: url('../images/warning.png');
}
.validation {
color: #D63301;
background-color: #FFCCBA;
background-image: url('../images/validation.png');
}

form {

    > input[type="text"],
    > input[type="email"] {
      
      &:valid {
        background: url('../images/validation.png');
        background-size: 20px;
        background-repeat: no-repeat;
        background-position: 20px 20px;

        // continue to hide the label
        & + label {
          opacity: 0;
        }
	  }
      }
    }