.text-center
{
    text-align: center;
}

.text-bold
{
    font-weight: bold;
}

.text-white
{
    color: #ffffff;
}

.text-black
{
    color: #000000;
}

body 
{
    background-color: #000000;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center;
 }

 .margin-20 
 {
    margin-top: 20px;
 }

 .margin-10 
 {
    margin-top: 10px;
 }

 #maincontent
 {
    background-color: #000000;
    opacity: 0.8;    
    color: #ffffff; 
    text-align: center;
    border-radius: 10px;
 }