body
{
    /* tag selector */
    font-family: Times New Roman, @Arial Unicode MS;
}

H1
{
    color: "black";
}

.explanatory_text
{
    /* class selector */
    font-family: Times New Roman;
    padding: 10px;
    text-align: justify;
    
}

.explanatory_text i
{
    font-family: Times New Roman;
    text-align: center;
     
}

#main_nav a
{
    color: red;
    padding-right: 70px;
    text-decoration: none;
}

#main_nav a:hover
{
    text-decoration: underline;
}