body {
    font-family: Arial, Helvetica;
    margin: 0px 100px;
    background-color: #D9D9D9;
    }


table, th, td {
    border: 2px solid black;
    border-collapse: collapse;
    padding: 5px;
    text-align: center;
    vertical-align: middle ;
}

th {
    font-size: 1 em;
    font-family: Verdana;
}

h1, h2, p {
    text-align: center;
}

td:hover, th:hover {
    background-color: #cfcfcf;
}