@media screen and (max-width: 640px){

.t-slds__thumbsbullet-wrapper {width: 100% !important;}
.t-slds__thumbsbullet-wrapper {padding-left:0px !important; padding-right:0px !important;}
.t-slds_thumbsbullet.t-slds_bullet {width: 100% !important} }

@media screen and (max-width:640px) {
    .t-slds_thumbsbullet.t-slds_bullet {
        width: 100% !important;
        margin-right: 4px;
        margin-top: 3px
    }
}