html {
   background: url(../img/bg.png) no-repeat center center fixed;
   background-size: cover;
   width: 100%;
   overflow: hidden;
}

.maintitle {
    margin-left: auto;
    margin-right: auto;
    margin-top: 10%;
    text-align: center;
    color: #000000;
    background: #e2d4b7bb;
    padding: 5px 20px 5px 10px; 
}