.has-float-label {
    display: block;
    position: relative;
}

    .has-float-label label {
        position: absolute;
        cursor: text;
        font-size: 90%;
        opacity: 1;
        -webkit-transition: all .2s;
        transition: all .2s;
        top: -1em;
        left: 0.5rem;
        line-height: 1;
        text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black;
        color: #FFFFFF;        
    }

    /*label over the invalid input*/
    .has-float-label input.ng-invalid.ng-dirty + label  {
        color: red;
        text-shadow: none;
    }


    .has-float-label .form-control::-webkit-input-placeholder {
        opacity: 1;
        -webkit-transition: all .2s;
        transition: all .2s;
    }

    .has-float-label .form-control::-moz-placeholder {
        opacity: 1;
        transition: all .2s;
    }

    .has-float-label .form-control:-ms-input-placeholder {
        opacity: 1;
        transition: all .2s;
    }

    .has-float-label .form-control::placeholder {
        opacity: 1;
        -webkit-transition: all .2s;
        transition: all .2s;
    }

    .has-float-label .form-control:placeholder-shown:not(:focus)::-webkit-input-placeholder {
        opacity: 0;
    }

    .has-float-label .form-control:placeholder-shown:not(:focus)::-moz-placeholder {
        opacity: 0;
    }

    .has-float-label .form-control:placeholder-shown:not(:focus):-ms-input-placeholder {
        opacity: 0;
    }

    .has-float-label .form-control:placeholder-shown:not(:focus)::placeholder {
        opacity: 0;
    }


    .has-float-label  .form-control:placeholder-shown:not(:focus) + * {
        font-size: 120%;
        opacity: .5;
        top: .6em;
        padding-left:5px;
        color: black;
        text-shadow: none;
    }

    .has-float-label .form-control:placeholder-shown:not(:focus).form-control-sm + * {
        font-size: 100%;
    }

.input-group .has-float-label {
    -webkit-box-flex: 1;
    -webkit-flex-grow: 1;
    -ms-flex-positive: 1;
    flex-grow: 1;
    margin-bottom: 0;
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
}

    .input-group .has-float-label .form-control {
        width: 100%;
        border-radius: 0.25rem;
    }

    .input-group .has-float-label:not(:last-child), .input-group .has-float-label:not(:last-child) .form-control {
        border-bottom-right-radius: 0;
        border-top-right-radius: 0;
        border-right: 0;
    }

    .input-group .has-float-label:not(:first-child), .input-group .has-float-label:not(:first-child) .form-control {
        border-bottom-left-radius: 0;
        border-top-left-radius: 0;
    }