body 
{
    margin: 0px;
    font-family: Arial;
    font-size: 15px;
    line-height: 25px;
    position: relative;
    background-color: #2d2d2e;
    color: #fff;
}

.main
{
    text-align: center;
}

.main img
{ 
    max-width: 100%;
    height: auto;
}