html {
    max-width: 40em;
    margin: auto;
}

.relevanturl {
    margin: 1em;
}

article {
    margin-top: 1ex;
    margin-bottom: 1ex;
    padding-left: 1em;
}

:target {
    border-left: 10px solid green;
    border-top: 1px solid green;
    border-bottom: 1px solid green;
}