body{
    font-family: Arial;
    margin:40px;
}

nav a{
    margin-right:20px;
}

table{
    border-collapse: collapse;
    margin-top:20px;
}

td,th{
    border:1px solid black;
    padding:8px;
}

.cat0{
    background-color:#b3e5fc;
}

.cat1{
    background-color:#fff176;
}

.cat2{
    background-color:#ffd54f;
}

.cat3{
    background-color:#ffb74d;
}

.cat4{
    background-color:#ff8a65;
}

.cat5{
    background-color:#e57373;
}