h1 {
    color: black;
    font-size: 30px;
    text-align: center;
}
h5 {
    text-align: center;
}
nav {
    text-align: center;
    background: whitesmoke;
    padding: 15px 15px;
}
nav a {
    text-decoration: none;
    font-size: 20px;
    padding: 15px 15px;
    color: black;
    background: whitesmoke;
}
nav a.active{
    color: green;
}
nav a:hover{
    color: deepskyblue;
}
body {
    background-image: url(preview.jpg) ;
    width: 900px;
    margin: 0 auto;
}
header {
    padding: 5px;
    background: white;
}
main {
    padding: 10px 46px;
    width: 808px;
    background: white;
    margin: 0 auto;
    text-align: center;
}
footer{
    padding: 10px;
    background: whitesmoke;
    text-align: center;
}
.left {
    text-align: left;
}