public.css

*,
*:before,
*:after{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    padding: 30px;
}
.container{
    width: 100%;
    height: 40px;
    position: relative;
    margin-bottom: 30px;
}
#toggle{
    -webkit-appearance: none;
    appearance: none;
    height: 40px;
    width: 75px;
    background-color: #15181f;
    position: absolute;
    right: 0;
    border-radius: 20px;
    outline: none;
    cursor: pointer;
}
#toggle:after{
    content: "";
    position: absolute;
    height: 30px;
    width: 30px;
    background-color: #ffffff;
    top: 5px;
    left: 7px;
    border-radius: 50%;
}
p{
    font-family: "Open Sans",sans-serif;
    line-height: 35px;
    text-align: justify;
}
.dark-theme{
    background-color: #15181f;
    color: #e5e5e5;
}
.dark-theme #toggle{
    background-color: #ffffff;
}
.dark-theme #toggle:after{
    background-color: transparent;
    box-shadow: 10px 10px #15181f;
    top: -4px;
    left: 30px;
}