nav{
    margin: -2.5mm;
    padding: 2.5mm;
    background-color: lightblue;
    text-align: center;
}


footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: lightblue;
    color: white;
    text-align: center;
}

a{
    border: solid;
    padding: 1mm;
    background-color: white;
    color: #8fb2bd;
    text-decoration: none;
}