#white {
    height: 1200px;
    background-color: #FFF;
    overflow: hidden;
}

#brown {
    width: 225%;
    height: 100%;
    background-color: #F6F0E8;
    border-radius: 100%;
    top: -57%;
    left: -65%;
    right: 0;
    position: relative;
}

@media only screen and (max-width: 413px) {
    #brown {
        width: 298%;
        left: -100%;
    }
}

@media only screen and (max-width: 375px) {
    #brown {
        width: 298%;
        left: -100%;
    }
}