.ui.checkbox label {
    padding-left:0;
    padding-right:3em;
    padding-bottom:1em;
}

.ui.checkbox input,
.ui.checkbox label:before {
    left:auto;
    right:0;
}

.ui.checkbox label:after {
    left:auto;
    right:0;
    transition:background 0.3s ease 0s, right 0.3s ease 0s;
}

.ui.checkbox input:checked + label:after {
    left:auto;
    right:0em;
    transition:background 0.3s ease 0s, right 0.3s ease 0s;
}