nav{
    background-color: plum;
}
body{
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
span{
    margin-left: 10px;
    margin-top: 10px;
}
.footer {
    position:static;
    bottom: 0;
    margin-bottom: 0px;
    width: 100%;
    height: 15px;
}
.card {
    margin-top: 15px;
}
.card-header{
    background-color: plum;
}