.header-logo {
    background: url(https://revistas.unicartagena.edu.co/public/journals/9/background-header.jpg) !important;
    background-size: 100% auto !important;
	background-position: top !important;
}
.header-logo:before {
    width: 100%;
    background: rgba(0,0,0,0.2);
    transform: none;
    margin: 0;
}