body {
    background: url("../fotos/fondo-renove.jpg") no-repeat center 100% fixed;
    background-size: cover;
    font-size: 17px;
}

main {
    background: #FFFC;
    position: relative;
    padding: 20px 0 20px 0;
    box-shadow: #333 0 4px 8px;
    overflow: visible;
    width: 98%;
}




@media screen and (min-width: 1100px) {
    main{
      float: right;
      margin: 40px;
      width: 60%;
      max-width: 860px;
      padding: 20px 3% 20px 3%;
    }
}