body {
    margin: 10px;
    border: solid 10px greenyellow;
    padding: 20px;
    color: aqua;
}

@layer lion, like;

@layer like {
    p {
        color: red;
    }
}

@layer lion {
    p {
        color: green;
    }
}

/* cascade(캐스캐이드, 겹침) */
/* h1 {
    color: blueviolet;
}

p {
    color: orange;
}

#school.like {
    color: gray;
}

#school {
    color: red;
} */