Why are the div’s not included in the dark-mode function?

I’m new to this language. So far I’ve only dealt with html and css. Thats why i looked up a Totourial. I took the code and tried to change it. It worked for the beginning, but when I tried to add divs in dark mode, it didn’t work.
So my problem is that the divs are not included in the dark mode, and the font, font-color etc. I thought by adding div instead of body, it would work. But this was not the case…
I hope you can help me with that.

<div class="power">

     <div id="toggle">

        <i class="indicator"></i>

     </div>

      <script>

      const body = document.querySelector('body');
      const div = document.querySelector('div');
      const toggle = document.getElementById('toggle');
            toggle.onclick = function(){
                   toggle.classList.toggle('active');
                   body.classList.toggle('active');
                   div.classList.toggle('active')

                                }

                    
     </script>
                           
</div>

CSS: 

body {

    background-image: radial-gradient(#ada9a9 2%, transparent 7%),
    radial-gradient(#928f8f 2%, transparent 7%);
    background-color: #f8efd6;
    background-position: 25px 35px, 50px 50px;
    background-size: 20px 20px;
    transition: 0.5s;
    
}



body.active{

    
    background-image: radial-gradient(#5c5252 2%, transparent 7%),
        radial-gradient(#928f8f 2%, transparent 7%);
    background-color: #16140f;
    background-position: 25px  35px, 50px 50px;
    background-size: 20px 20px;

}


#toggle {

    position: relative;
    display: block;
    width: 100%;
    height: 40px;
    border-radius: 160px;
    background: #fff;
    transition: 0.5s;
    cursor: pointer;
    box-shadow: inset 0 2px 60px rgba(0,0,0,0.1),
                inset 0 2px 8px rgba(0,0,0,0.1),
                inset 0 -4px 4px rgba(0,0,0,0.05);

}

#toggle.active {

    background-color: #222;
    box-shadow: inset 0 8px 60px rgba(0,0,0,0.1),
                inset 0 8px 8px rgb(0,0,0,0.1),
                inset 0 -4px 4px rgb(0,0,0,0.1);


}

#toggle .indicator {

    position: absolute;
    top: 0;
    left: 0;
    width: 40%;
    height: 40px;
    background: linear-gradient(to bottom, #eaeaea,#f9f9f9);
    border-radius: 50%;
    transform: scale(0.9);
    box-shadow: 0 8px 40px rgba(0,0,0,0.5),
                inset 0 4px 4px rgba(255,255,255,1),
                inset 0 -4px 4px rgba(255,255,255,1);
    transition: 0.5s;


}

#toggle.active .indicator {

    left: 60%;
    background: linear-gradient(to bottom, #444,#222);
    box-shadow: 0 8px 40px rgba(0,0,0,0.5),
                inset 0 4px 4px rgba(255,255,255,0.2),
                inset 0 -4px 4px rgba(255,255,255,0.2);
    transition: 0.5s;

}

div.active {

    background-color: rgb(31, 31, 31);

}