body {
                background-image: url("/images/products.jpg");
background-repeat: no-repeat;
background-position: center center;
background-size: cover;
background-attachment: fixed;
/* backdrop-filter: blur(2px) contrast(20%) brightness(150%); */
                background-color: #fff;
                color: #000;
                font-family: sans-serif,helvetica;
                margin: 0;
                padding: 0;
                min-height: 100vh;
                display: flex;
                flex-direction: column;
                overflow-y: overlay;
            }
            a { text-decoration: none;
            }
            :link {
                color: rgba(0,0,170,1.0);
            }
            :visited {
                color: rgba(0,0,170,1.0);
            }
            a:hover {
                color: rgba(170,0,0,1.0);
            }
            header {
                text-align: center;
                margin: 0;
                padding: 1vw 1vw 1vw;
                background-color: rgba(0,0,170,0.5);
                color: #fff;
                font-size: larger;
                font-weight: normal;
                border-bottom: 2px solid #294172; 
            }
            header strong {
                font-weight: bold;
                font-size: 115%
            }
            article {
                padding: 2vw 2vw;
            }
            img {
                border: 2px solid rgba(0,0,0,0.0);
                padding: 2px;
                margin: 2px;
            }
            a:hover img {
                border: 2px solid rgba(0,0,170,1.0);
            }
            footer {
                margin-top:auto;
                margin-left: auto;
                margin-right: auto;
            }
            sup {
                vertical-align: super;
                font-size: 75%;
            }
            pre {
               white-space: pre-wrap;       /* css-3 */
               white-space: -moz-pre-wrap;  /* Mozilla, since 1999 */
               white-space: -pre-wrap;      /* Opera 4-6 */
               white-space: -o-pre-wrap;    /* Opera 7 */
               word-wrap: break-word;       /* Internet Explorer 5.5+ */
            }
            @media screen and (max-width: 600px) {
                #myBTC, #myETH, #myXMR {
                    visibility: hidden;
                    display: none;
                }
            }