/* ==========================================================================
   unified_nav.css — Unified Tastatur- & Gesten-Navigation (UNAV, 18.09.2026)
   ----------------------------------------------------------------------------
   Highlight der per ↑/↓ (Desktop) bzw. Flick (Mobile) selektierten Karte
   über alle Listen-Ansichten: RSS-Kategorie, RSS-Inhaltsdarstellung (Teaser),
   News-Kategorie/Page-Grid, Related/Similar — plus Realtime-Popup
   (.rn-card-selected, realtime-news.js eigene Tastaturführung, gleiche Optik).

   Bewusst UNLAYERED: Karten-Wrapper tragen Layout-Klassen aus verschiedenen
   Layern; das Selection-Outline muss zuverlässig gewinnen (S11-Lektion:
   Utilities/Heiler unlayered oder top-level).
   ========================================================================== */

.rss-feed-card-wrapper.unav-selected,
article.rss-content-teaser.unav-selected,
.rss-category-card.unav-selected,
[data-unav-card].unav-selected,
.news-item-card.rn-card-selected {
    outline: 2px solid var(--color-accent-cyan, #22d3ee);
    outline-offset: 3px;
    border-radius: 1rem;
    box-shadow: 0 0 0 6px rgba(34, 211, 238, 0.12),
                0 12px 32px -12px rgba(34, 211, 238, 0.4);
    position: relative;
    transition: box-shadow 0.15s ease, outline-color 0.15s ease;
}

/* ⏎-Badge: signalisiert die Enter-Aktion auf der selektierten Karte */
.rss-feed-card-wrapper.unav-selected::after,
article.rss-content-teaser.unav-selected::after,
.rss-category-card.unav-selected::after,
[data-unav-card].unav-selected::after,
.news-item-card.rn-card-selected::after {
    content: "⏎";
    position: absolute;
    top: 8px;
    right: 10px;
    z-index: 6;
    background: rgba(11, 20, 38, 0.92);
    color: var(--color-accent-cyan, #67e8f9);
    border: 1px solid rgba(34, 211, 238, 0.55);
    border-radius: 8px;
    padding: 1px 9px;
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1.6;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    pointer-events: none;
    box-shadow: 0 4px 14px -4px rgba(0, 0, 0, 0.5);
}

/* Einmaliger Bedienhinweis (Tastatur bzw. Flick) */
.unav-hint {
    position: fixed;
    left: 50%;
    bottom: 18px;
    transform: translateX(-50%);
    z-index: 10800;
    background: rgba(11, 20, 38, 0.94);
    color: var(--color-text-heading, #f8fafc);
    border: 1px solid rgba(34, 211, 238, 0.4);
    border-radius: 9999px;
    padding: 7px 18px;
    font-size: 0.78rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    box-shadow: 0 10px 30px -8px rgba(0, 0, 0, 0.6);
    pointer-events: none;
    backdrop-filter: blur(8px);
    animation: unavHintIn 0.25s ease-out;
}

@keyframes unavHintIn {
    from { opacity: 0; transform: translate(-50%, 8px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

/* Light Mode: Cyan-Signatur auf dunklem Chip bleibt lesbar; Outline dunkler */
[data-bs-theme="light"] .rss-feed-card-wrapper.unav-selected,
[data-bs-theme="light"] article.rss-content-teaser.unav-selected,
[data-bs-theme="light"] .rss-category-card.unav-selected,
[data-bs-theme="light"] [data-unav-card].unav-selected,
[data-bs-theme="light"] .news-item-card.rn-card-selected {
    outline-color: #0891b2;
    box-shadow: 0 0 0 6px rgba(8, 145, 178, 0.10),
                0 12px 32px -12px rgba(8, 145, 178, 0.30);
}

@media (prefers-reduced-motion: reduce) {
    .unav-hint { animation: none; }
    .rss-feed-card-wrapper.unav-selected,
    article.rss-content-teaser.unav-selected,
    .rss-category-card.unav-selected,
    [data-unav-card].unav-selected,
    .news-item-card.rn-card-selected { transition: none; }
}