body::before {
    content: "";
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background-image: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='120'%20height='60'%3E%3Ctext%20x='0'%20y='40'%20font-size='12'%20fill='rgba(52,152,219,0.14)'%20font-family='Segoe%20UI'%3Ewww.alimehr.com%3C/text%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 320px 160px;
    transform: rotate(-30deg);
    z-index: 0;
    pointer-events: none;
}

body>* {
    position: relative;
    z-index: 1;
}