body{
    font-size: 16px;
    font-family: monospace;
    width: 800px;
    margin-bottom: auto;
    margin-top: auto;
    margin-right: auto;
    margin-left: auto;
}
.header{
    padding: 5px;
    text-align: center;
    border-bottom: 2px dotted;
}
.footer{
    padding: 5px;
    text-align: center;
    border-top: 2px dotted;
}
a{
    color: black;
}