.toggle {
    width: 0;
    height: 0;
    visibility: hidden;
}

.toggle + label {
    cursor: pointer;
    width: 50px;
    height: 26px;
    background: #ccc;
    display: inline-block;
    border-radius: 50px;
    position: relative;
}

.toggle + label:after {
    content: "";
    width: 22px;
    height: 22px;
    background: #fff;
    position: absolute;
    top: 2px;
    left: 2px;
    border-radius: 50%;
    transition: 0.3s;
}

.toggle:checked + label {
    background: #4caf50;
}

.toggle:checked + label:after {
    left: calc(100% - 2px);
    transform: translateX(-100%);
}