a:link {
    color: #363636;
    text-decoration: none;
}

a:visited {
    color: #001838;
    text-decoration: none;
}

a:hover {
    text-decoration: none;
    color: #505050;
}

a:active {
    color: #b6b6b6;
    text-decoration: none;
}

.heading {
    text-align: center;
    margin-left: 10%;
    color: #000000;
    font-size: 40px;
    font-weight: bold;
    padding: 16px 15px;
}

.main {
    margin-left: 10%;
    color: #000000;
    font-size: 35px;
    padding: 10px 15px;
}

th, td {
    padding: 10px;
    text-align: center;
}