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

.has-float-label label, .has-float-label > span {
    position: absolute;
    left: 0;
    top: 0;
    cursor: text;
    font-size: 99%;
    color: #146ca4;
    opacity: 1;
    -webkit-transition: all .2s;
    transition: all .2s;
    top: -.5em;
    left: 12px;
    z-index: 3;
    line-height: 1;
    padding: 0 1px;
}

.lg.has-float-label label, .lg.has-float-label > span {
    line-height: 1.6;
    top: -.8em;
}
.has-float-label label::after, .has-float-label > span::after {
    content: " ";
    display: block;
    position: absolute;
    background: #fcfcfc;
    height: 2px;
    top: 50%;
    left: -.2em;
    right: -.2em;
    z-index: -1;
}

.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) + label { /* replace + abel with + * to target any element */
    font-size: 150%;
    color: black;
    opacity: .5;
    top: .3em;
    font-weight: normal;
}

.input-group .has-float-label {
    display: table-cell;
}

.input-group .has-float-label .form-control {
    border-radius: 4px;
}

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

.input-group .has-float-label:not(:first-child) .form-control {
    border-bottom-left-radius: 0;
    border-top-left-radius: 0;
    margin-left: -1px;
}