body {
    background-color: palegreen;
    background-image: url("https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTewpV_jUKRn1Fp4HF3TKR0pb08Csz1JoLunzS_rSVo8Q&s");
    background-size: cover;
    background-attachment: fixed;
}

body.cats {
    background-image: url("https://content.assets.pressassociation.io/2017/07/18153241/17_7_5_WildcatKitten_SA_11.jpg");
}

body.cats main {
    background-image: none;
}

nav {
    background-color: pink;
    padding: 20px;
}

a {
    background-color: crimson;
    color: white;
    padding: 10px;
    text-decoration: none;
}


p {
    color: red;
    font-size: 20px;
    font-family: "Dancing Script", cursive;
}

p.subheading {
    text-align: center;
    font-weight: bold;
}

main {
    background-color: pink;
    background-image: linear-gradient(pink, lime, teal);
    width: 70%;
    margin: auto;
    padding: 20px;
    box-shadow: 5px 5px 10px green;

    border-width: 2px;
    border-style: solid;
    border-color: black;
    border: 2px solid black;
    border-radius: 20px;
}

h1 {
    font-size: 80px;
    text-align: center;
    text-shadow: 5px 5px 10px green;
    margin-bottom: 30px;
}

h2 {
    color: blue;
}