table.index {
    width: 60%;
    margin-left: 20%;
    margin-right: 20%;
    border: outset;
    border-width: 1px;
}

table.index th {
    background: #303070;
    color: #ffffff;
    font-size: 22px;
    padding: 10px;
}

table.index td {
    font-size: 16px;
    background: #d0d0d0;
    text-align: center;
    padding: 5px;
    border-style: inset;
    border-width: 1px;
}

div.introduction {
    text-align:justify;
    width: 60%;
    margin-left: 20%;
    margin-right: 20%;
    background: #ffff90;
    border-width: 1;
    border-style: inset;
    padding: 7px;
    font-size: 14px;
}