body{
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    transition: .4s;
}

.label{
    position: absolute; 
    width: 170px;
    height: 70px;
    background-color: lightgray;
    border-radius: 40px;
    cursor: pointer;
}

.input{
    visibility: hidden;
}

.circle{
    width: 62px;
    background-color: white;
    height: 62px;
    border-radius: 50%;
    top: 5px;
    position: absolute;
    left: 5px;
    animation: toggleOFF 0.3s linear forwards;
}

.input:checked + .label{
    background-color: crimson;
}

.input:checked + .label .circle{
    animation: toggleON 0.3s ease-in forwards;
}


@keyframes toggleON {
    0%{
        transform: translateX(0);
    }
    100%{
        transform: translateX(95px);
    }
}

@keyframes toggleOFF {
    0%{
        transform: translateX(95px);
    }
    100%{
        transform: translateX(0);
    }
}