body {
    font-size: 26px;
    background: url(https://st.depositphotos.com/2192188/2277/v/450/depositphotos_22771582-Blue-sky-with-clouds-repeating-pattern.jpg);
}

h1, a {
    color: green;
}

div.middle {
    max-width: 800px; 
    padding: 1em; 
    margin: auto;
}

img {
    width: 500px;
    box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.6), 0 12px 20px 0 rgba(0, 0, 0, 0.5);
}