a.knowledge
{
    text-decoration: none;
    font-weight: bold;
    padding: 10px;
    vertical-align: middle;

}

a.blue
{
    text-decoration: none;
    color: #0000FF;
}

a.blue_under_table
{
    text-decoration: none;
    color: #0000FF;
}

a.blue_under_table:hover
{
    text-decoration: none;
    color: #009bc7;
}


a.kontrukcja
{
    text-decoration: none;
    color: #4B4B4B;
}

a.kontrukcja:hover
{
    text-decoration: none;
    color: #009bc7;
}