button.aura_transparent_button {
    margin: 4px;
    min-width: 48px;
    min-height: 48px;
    border: #bbbbbb solid 1px !important;
    border-radius: 8px !important;
    box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.12) !important
}