/* ── Screenreader-only Text ───────────────────────────────────────────────── */
.kapitel-nav-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ── Navigation Box ───────────────────────────────────────────────────────── */
.kapitel-nav-box {
    margin-top: 40px;
    padding: 20px 24px;
    background: #f9f9f9;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
}

.kapitel-nav-title {
    font-size: 1rem;
    font-weight: 600;
    color: #555;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ── Liste ────────────────────────────────────────────────────────────────── */
.kapitel-nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.kapitel-nav-list .kapitel-nav-list {
    padding-left: 16px;
    margin-top: 4px;
}

.kapitel-nav-list li {
    padding: 5px 0;
    border-bottom: 1px solid #ececec;
}

.kapitel-nav-list li:last-child {
    border-bottom: none;
}

.kapitel-nav-list li a {
    text-decoration: none;
    color: #333;
    display: inline-block;
}

.kapitel-nav-list li a:hover {
    color: #0073aa;
    text-decoration: underline;
}

.kapitel-nav-list li a:focus {
    outline: 2px solid #0073aa;
    outline-offset: 2px;
}

.kapitel-nav-list li a:focus:not(:focus-visible) {
    outline: none;
}

/* ── Aktive Seite ─────────────────────────────────────────────────────────── */
.kapitel-nav-active > a {
    font-weight: bold;
    color: #0073aa !important;
}

.kapitel-nav-arrow {
    color: #0073aa;
    font-size: 0.75rem;
    margin-right: 4px;
}

/* ── Plain Style ──────────────────────────────────────────────────────────── */
.kapitel-menu-plain {
    margin-top: 20px;
}

.kapitel-menu-plain .kapitel-nav-title {
    font-size: 0.9rem;
    color: #888;
}

.kapitel-menu-plain .kapitel-nav-list li {
    border-bottom: none;
    padding: 3px 0;
}

.kapitel-menu-plain .kapitel-nav-list li a {
    color: #555;
}

/* ─────────────────────────────────────────────
   WEITER/ZURÜCK NAVIGATION (mit Tooltip)
   ───────────────────────────────────────────── */

.kapitel-nav-buttons {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin: 20px 0;
    padding: 0;
}

.kapitel-nav-buttons-top {
    margin-bottom: 20px;
}

.kapitel-nav-buttons-bottom {
    margin-top: 20px;
}

/* ── Buttons (kompakt) ────────────────────────────────────────────────────── */
article .entry-content a.kapitel-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 6px;
    text-decoration: none !important;
    color: #333;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

article .entry-content a.kapitel-nav-btn:hover {
    background: #e8e8e8;
    border-color: #999;
    transform: translateY(-2px);
    box-shadow: 0 3px 6px rgba(0,0,0,0.1);
    text-decoration: none !important;
}

article .entry-content a.kapitel-nav-btn:focus {
    outline: 3px solid #0073aa;
    outline-offset: 3px;
    text-decoration: none !important;
}

article .entry-content a.kapitel-nav-btn:focus:not(:focus-visible) {
    outline: none;
}

article .entry-content a.kapitel-nav-btn:active {
    text-decoration: none !important;
}

/* ── Button-Label (nur "Zurück"/"Weiter") ─────────────────────────────────── */
.kapitel-nav-btn-text {
    display: flex;
    align-items: center;
}

.kapitel-nav-btn-label {
    font-size: 14px;
    font-weight: 500;
}

/* ── Seitentitel versteckt (nur für Screenreader) ─────────────────────────── */
.kapitel-nav-btn-title {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ── Tooltip beim Hover ───────────────────────────────────────────────────── */
article .entry-content a.kapitel-nav-btn::after {
    content: attr(data-title);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: 6px 12px;
    background: #333;
    color: #fff;
    font-size: 13px;
    white-space: nowrap;
    border-radius: 4px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 100;
}

article .entry-content a.kapitel-nav-btn:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}

/* ── Tooltip-Pfeil ────────────────────────────────────────────────────────── */
article .entry-content a.kapitel-nav-btn::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(2px);
    border: 5px solid transparent;
    border-top-color: #333;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 100;
}

article .entry-content a.kapitel-nav-btn:hover::before {
    opacity: 1;
    transform: translateX(-50%) translateY(-2px);
}

/* ── Pfeil-Icon ───────────────────────────────────────────────────────────── */
.kapitel-nav-arrow {
    font-size: 16px;
    font-weight: bold;
    color: #666;
    flex-shrink: 0;
}

/* ── Ausrichtung bei nur einem Button ─────────────────────────────────────── */
.kapitel-nav-buttons:has(.kapitel-nav-next:only-child) {
    justify-content: flex-end;
}

.kapitel-nav-buttons:has(.kapitel-nav-prev:only-child) {
    justify-content: flex-start;
}

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .kapitel-nav-buttons {
        gap: 10px;
    }
    
    article .entry-content a.kapitel-nav-btn {
        padding: 8px 14px;
        font-size: 13px;
    }
    
    article .entry-content a.kapitel-nav-btn::after {
        font-size: 12px;
        padding: 5px 10px;
    }
}

@media (max-width: 480px) {
    article .entry-content a.kapitel-nav-btn::after,
    article .entry-content a.kapitel-nav-btn::before {
        display: none;
    }
}