styles.css

*{
    box-sizing: border-box;
}
body{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    margin: 0;
    font-family: Georgia, 'Times New Roman', Times, serif;
    color: black;
    background-image: url('https://www.penbaypilot.com/sites/default/local/styles/node_primary/public/2019/04/field/image/56571144_2270164176643879_3917591854257799168_n.jpg?itok=e_u54rC8');
    background-color: rgb(246, 188, 100);
}

.btn{
    background-color: yellow;
    border-radius: 5px;
    border: none;
    color: rgb(0, 0, 255);
    margin: 1rem;
    padding: 1.5rem 3rem;
    font-size: 1.2rem;
    font-family: inherit;
    cursor: pointer;
}

.btn:focus{
    outline: none;
}
.btn:hover{
    opacity: 0.9;
}
@media screen and (min-width:100px) and (max-width:850px) {
    body{
        display: flex;
        flex-direction: column;
        height: 100vh;
        background-position: 60%;
        background-repeat: no-repeat;
        background-size: cover;
        background-image: url('https://www.penbaypilot.com/sites/default/local/styles/node_primary/public/2019/04/field/image/56571144_2270164176643879_3917591854257799168_n.jpg?itok=e_u54rC8');
        background-color: rgb(246, 188, 100);
        overflow-y: scroll;
    }
}