.icon-btn-icon {
    position: relative;
    left: -12px;
    display: inline-block;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 3px 0 0 3px;
}

.icon-btn {
    padding-top: 0;
    padding-bottom: 0;
}