input:required:focus:valid {
        background: url("https://ebc.mx/assets/img/home/check-circle-solid.png") no-repeat 95% 50% ;
        background-size: 25px;
        border:2px solid #2ECC71;
      }

      input:focus:invalid {
        background: url("https://ebc.mx/assets/img/home/exclamation-circle-solid.png") no-repeat 95% 50% ;
        background-size: 25px;
        border:2px solid #E74C3C;
      }
     
      .group input:required:focus:valid {
        background: url("https://ebc.mx/assets/img/home/check-circle-solid.png") no-repeat 95% 50% ;
        background-size: 25px;
        border:2px solid #2ECC71;
      }

      .group input:focus:invalid {
        background: url("https://ebc.mx/assets/img/home/exclamation-circle-solid.png") no-repeat 95% 50% ;
        background-size: 25px;
        border:2px solid #E74C3C;
      }