.main {
    width: 50%;
    margin: 50px auto;
}

.form-group .form-control {
    padding-left: 2.375rem;
}

.form-group .form-control-icon {
    position: absolute;
    z-index: 2;
    display: block;
    width: 2.375rem;
    height: 2.375rem;
    line-height: 2.375rem;
    text-align: center;
    pointer-events: none;
    color: #aaa;
}