body{
    transition:background-color 0.3s, color 0.3s;
}

.dark-mode{
    background-color:#0d1021;
    color:#FFFFFF;
}

.switch{
    position:relative;
    display:inline-block;
    width:60px;
    height:34px;
}

.switch input{
    opacity:0;
    width:0;
    height:0;
}
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color:#CCC;
    transition: 0.4s;
}
.slider::before{
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: #FFF;
    transition: 0.4s;
}
input:checked + .slider{
    background-color: #2196F3;
}
input:focus + .slider{
    box-shadow: 0 0 1px #2196F3;
}
input:checked + .slider:before {
    transform:translateX(26px);
}
.slider.round{
border-radius:34px;
}
.slider.round:before{
    border-radius:50%;
}

.slider{
    transform: scale(75%);
}