easy-going-rails/app/assets/stylesheets/navbar.css

nav {
    background-color: black;
    color: azure;

    p {
        background-color: aqua;
    }


    p:hover {
        background-color: blueviolet;
    }

    &:hover p {
        background-color: yellow;
    }
}

p {
    background-color: red;
}