style.css

.dark-mode {
    background-color: black;
    color: white;
  }
footer{
    margin: 4px;
    padding: 7px;

}
select{
    border: 2px dashed black;
    color: tomato;
    background-color: bisque;
    cursor: pointer;
}
body{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    background-color: whitesmoke;
    display: flex;
    justify-content: center;

}
div{
    /* border: 1px solid rgb(69, 168, 207); */
    /* box-shadow:5px 10px 18px 10px rgb(198, 196, 196); */
    /*background-color: rgba(154, 19, 156, 0.1); */
    width: 100%;
    height: 100%;
    margin: auto;
    padding: 10px;
    display: flex;
    justify-content: center;

}    
button{
    margin: 0px;
    width: 50px;
    height: 50px;
    padding: 0px;
    background-color: rgb(16, 36, 36);
    color: aliceblue;
    border-radius: 20%;
    cursor: pointer;
    border :none;
}
.but{
    height: 40px;
}
.egal{
    background-color: brown;
}
.Trait{
    background-color: green;
}
.depart{
    background-color: rgb(249, 0, 0);
}
.btn{
    background-color: brown;
}
.but{
    background-color: rgb(206, 222, 140);
    border-radius: 10px;
    border: none;
}

a{
    text-decoration: none;
    color: white;
}
button:active{
    background-color: gray;
}
label{
    position: absolute;
    width: 45px;
    height: 19px;
    right: 20px;
    top: 20px;
    border: 2px solid;
    border-radius: 20px;
}
label:before{
    position: absolute;
    content: '';
    width:18px;
    height: 18px;
    left: 1px;
    top: 0.7px;
    border-radius: 50%;
    background: #000;
    cursor: pointer;
    transition: 0.4s;
}
label.active:before{
    left: 24px;
    background: #fff;
}
body.night{
    background: #000;
    color: #fff;
}

@media only screen and (max-width: 500px) {
    div {
      width: 100%;
    }

    button {
      width: 40px;
      height: 40px;
    }
    label{
        display: none; }
  }