/* New Year */
.block-header-logo {
    position: relative;
}

.block-header-logo::after {
    content: '';
    position: absolute;
    top: -15px;
    right: -15px;
    width: 50px;
    height: 50px;
    background-image: url("https://be1st.pro/sites/default/files/images/artage-io-thumb-alt.png");
    background-size: contain;
    background-repeat: no-repeat;
    z-index: 2;
    pointer-events: none; /* Чтобы шапка не мешала кликам */
}