body {
    background-color: ivory;
}


div.topnav {
    color: blue;
    font-size: 17px;
    display: block;
}

div.e {
    background-color: coral;

}

table,
th,
td {
    border: 3px solid black;
    border-collapse: collapse;
    padding: 6px;
    text-align: center;
}

th {
    font-size: 1.2em;
    font-family: arial;
    background-color: #EDFA8B;
}

/*alternationg colors*/
tbody tr:nth-child(odd) {
    background-color: #ADE28A;
    font-size: 18px;
}

tbody tr:nth-child(even) {
    background-color: #256670;
    color: whitesmoke;
    font-size: 18px;
}

a.b {
    background-color: #EDFA8B;
    color: black;
    padding: 10px 18px;
    border-radius: 10px;
    text-decoration: none;
    /* underline: */
    font-size: 2em;
    /* lem = standerard size*/
    display: inline-block;
    border: 5px solid black;
}