a.input-group-addon {
    top: 30%
}

/* Extra small devices (phones, 600px and down) */
@media only screen and (max-width: 600px) {
    a.input-group-addon {
        left: 85%;
    }
}

/* Small devices (portrait tablets and large phones, 600px and up) */
@media only screen and (min-width: 600px) {
    a.input-group-addon {
        left: 88%;
    }
}

/* Medium devices (landscape tablets, 768px and up) */
@media only screen and (min-width: 768px) {
    a.input-group-addon {
        left: 90%;
    }
}

/* Large devices (laptops/desktops, 992px and up) */
@media only screen and (min-width: 992px) {
    a.input-group-addon {
        left: 93%;
    }
}