body {
    background-image: url(../img/bg/paper-1074131_1920_mirrored.jpg);
    background-color: #DFC4A3;
    background-attachment: scroll;
    background-repeat: repeat;
}

.letter {
    background: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.3);
    margin: 26px auto 0;
    min-height: 300px;
    padding: 24px;
    position: relative;
}
.letter:before, .letter:after {
    content: "";
    height: 98%;
    position: absolute;
    width: 100%;
    z-index: -1;
}
.letter:before {
    background: #fafafa;
    box-shadow: 0 0 8px rgba(0,0,0,0.2);
    left: -5px;
    top: 4px;
    transform: rotate(-2.5deg);
    box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}
.letter:after {
    background: #f6f6f6;
    box-shadow: 0 0 3px rgba(0,0,0,0.2);
    right: -3px;
    top: 1px;
    transform: rotate(1.4deg);
    box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}