/*
 * Source previews use only citation text already present on the page. Links
 * remain ordinary links; the preview is an optional hover/focus aid.
 */
a[data-kop-citation-preview] {
    position: relative;
}

a[data-kop-citation-preview]::after {
    position: absolute;
    z-index: 10000;
    top: calc(100% + 0.45rem);
    left: 0;
    display: block;
    width: max-content;
    max-width: min(26rem, calc(100vw - 2rem));
    max-height: 12rem;
    overflow: hidden;
    padding: 0.7rem 0.85rem;
    border: 1px solid var(--kop-border-secondary, #aee0ed);
    border-radius: 0.55rem;
    background: var(--kop-white, #fff);
    box-shadow: 0 6px 20px rgb(0 4 53 / 18%);
    color: var(--kop-midnight-blue, #000435);
    content: attr(data-kop-citation-preview);
    font-size: 0.88rem;
    font-weight: 400;
    line-height: 1.45;
    text-align: left;
    text-decoration: none;
    white-space: normal;
    overflow-wrap: anywhere;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transition: opacity 120ms ease;
}

a[data-kop-citation-preview]:hover::after,
a[data-kop-citation-preview]:focus-visible::after {
    visibility: visible;
    opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
    a[data-kop-citation-preview]::after {
        transition: none;
    }
}