html, body
{
    font-family: 'Courier New', Courier, monospace;
    font-size: 23px;
    background-color: rgb(24, 57, 128);
}
#site_header
{
    width: 84%;
    min-height: 200px;
    height: auto;
    border: solid;
    text-align: center;
    margin: 0 auto;
    background-color: rgb(255, 255, 255);

}
#site_contents
{
    margin-top: 5%;
    width: 80%;
    min-height: 500px;
    height: auto;
    border: solid;
    padding: 30px;
    margin-bottom: 5%; 
    margin-left: auto;
    margin-right: auto; 
    background-color: rgb(255, 255, 255);
}