html {
    align-content: center;
    box-shadow: 5px 5px;
}

body {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    background-image: url('bttf.jpeg') repeat;
}

header {
    font-size: 35px;
    font-style: bold;
    text-align: center;
    color: white;
    background-color: silver;
    text-shadow: 5px 5px;
    padding: 15px;
}

nav {
    background-color: black;
    color: white;
    text-decoration: none;
    text-align: center;
}

nav:hover {
    background-color: red;
    color: white;
    text-decoration: none;
    text-align: center;
}

main {
    background-color: gray;
    color: lime;
    padding: 7px;
}

table tr:nth-child(odd){
    background-color: blue;
}

table tr:nth-child(even){
    background-color: navy;
}

img {
    float: right;
    border-width: 3px;
}

footer {
    text-align: center;
    color: white;
    background-color: silver;
    font-size: 75%;
}