/*.input-group {
    background: rgba(230,230,230);
    border: none;
}
.input-group > .form-control {
    background-color: transparent;
    border: none;
}*/
    .input-group > .form-control-icon {
        position: absolute;
        left: 0.75em;
        top: 0.45em;
    }
    .input-group > .form-control-icon + .form-control {
        padding-left: 2.5em;
    }