/* Intro buttons docked to the right of the Bible nav, keeping the rest centered. */
.bible-nav-right {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 0.4rem;
    align-items: center;
}
.bible-nav-right .intro-nav-btn {
    font-size: 1rem;
    padding: 0.3rem 0.5rem;
}

/* ───── Mobile overflow chevron + dropdown menu ─────
   Desktop: individual buttons visible, chevron hidden.
   Mobile (≤480px): individual nav-btn-overflow buttons hide, chevron + menu appear.
   The chevron sources the same actions by triggering .click() on the underlying button.
*/
.nav-overflow-btn {
    display: none;
    font-size: 1rem;
    padding: 0.3rem 0.55rem;
}
/* Menu uses position:fixed (positioned via JS at open time from the chevron's
   bounding rect) so it escapes any parent stacking-context and overflow issues. */
.nav-overflow-menu {
    position: fixed;
    min-width: 200px;
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: 8px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
    z-index: 20000;
    overflow: hidden;
}
.nav-overflow-menu[hidden] { display: none; }
.nav-overflow-item {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    width: 100%;
    padding: 0.6rem 0.9rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 0.88rem;
    color: #2d3748;
    font-family: inherit;
    white-space: nowrap;
}
.nav-overflow-item:hover { background: rgba(123, 104, 174, 0.10); }
.nav-overflow-item[hidden] { display: none; }
.nav-overflow-icon { font-size: 1rem; display: inline-block; width: 1.2rem; text-align: center; }

@media (max-width: 480px) {
    .bible-nav-right { right: 0.4rem; gap: 0.25rem; }
    .bible-nav-right .intro-nav-btn { font-size: 0.9rem; padding: 0.2rem 0.35rem; }
    .nav-btn-overflow { display: none !important; }
    .nav-overflow-btn { display: inline-flex; align-items: center; justify-content: center; }
}

/* ============================================================================
   Intro Overlay — modal scaffolding (frosted header + body that hosts the
   verse-commentary-style layout: tab bar → per-source pane → entry header → text).
   The inner body re-uses .commentary-* classes from styles.css so the styling
   matches the verse-commentary panel exactly.
   ============================================================================ */

.intro-overlay {
    position: fixed;
    inset: 0;
    z-index: 10100;
    display: none;
}

.intro-overlay-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.intro-overlay-content {
    position: absolute;
    top: 5vh;
    left: 50%;
    transform: translateX(-50%);
    width: min(900px, 92vw);
    max-height: 90vh;
    background: var(--highlight, #fdf8e7);
    border-radius: 14px;
    border-left: 3px solid #d4a017;
    box-shadow:
        0 0 0 0.5px rgba(0, 0, 0, 0.12),
        0 8px 24px rgba(0, 0, 0, 0.16),
        0 32px 64px rgba(0, 0, 0, 0.20);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.intro-overlay-header {
    display: flex;
    align-items: center;
    padding: 0.85rem 1.25rem;
    flex-shrink: 0;
    gap: 0.75rem;
}

.intro-overlay-title {
    color: #fff;
    font-family: 'Crimson Text', serif;
    font-weight: 700;
    font-size: 1.1rem;
    flex: 1;
}

.intro-close {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    border: none;
    color: #fff;
    font-size: 1.1rem;
    cursor: pointer;
}
.intro-close:hover { background: rgba(255,255,255,0.32); }

.intro-overlay-body {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 1.25rem 1.25rem;
    line-height: 1.6;
    color: var(--text-primary, #333);
    font-size: 0.85rem;
}

/* ───── ISBE self-referencing TOC ───── */
.isbe-intro .isbe-preamble {
    font-style: italic;
    color: var(--text-secondary, #666);
    margin: 0 0 0.6rem;
    font-size: 0.85rem;
}

.isbe-toc {
    list-style: none;
    padding: 0.6rem 0.85rem;
    margin: 0 0 1rem;
    background: rgba(212, 160, 23, 0.06);
    border-left: 3px solid #d4a017;
    border-radius: 0 6px 6px 0;
    font-size: 0.82rem;
}
.isbe-toc li {
    margin: 0.18rem 0;
    line-height: 1.35;
}
.isbe-toc-d0 { margin-top: 0.5rem !important; font-weight: 700; }
.isbe-toc-d0:first-child { margin-top: 0 !important; }
.isbe-toc-d1 { padding-left: 1rem; }
.isbe-toc-d2 { padding-left: 2rem; font-size: 0.78rem; }
.isbe-toc-d3 { padding-left: 3rem; font-size: 0.76rem; color: var(--text-secondary, #555); }
.isbe-toc-d4 { padding-left: 4rem; font-size: 0.74rem; color: var(--text-secondary, #777); }

.isbe-toc a {
    color: #7b4f01;
    text-decoration: none;
    border-bottom: 1px dotted rgba(123, 79, 1, 0.35);
}
.isbe-toc a:hover {
    color: #d4a017;
    border-bottom-color: #d4a017;
}
.isbe-toc-orphan {
    color: var(--text-secondary, #999);
    cursor: default;
}

.isbe-body h3.isbe-section {
    font-family: 'Crimson Text', serif;
    font-size: 1rem;
    font-weight: 700;
    color: #7b4f01;
    margin: 1.4rem 0 0.5rem;
    padding-top: 0.2rem;
    scroll-margin-top: 0.5rem;
}
.isbe-body p {
    margin: 0 0 0.75rem;
}

/* Right-click selection menu */
.intro-selection-menu {
    position: fixed;
    background: #fff;
    border: 1px solid rgba(0,0,0,0.14);
    border-radius: 6px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.18);
    z-index: 10200;
    overflow: hidden;
    min-width: 160px;
}
.intro-menu-item {
    display: block;
    width: 100%;
    padding: 0.55rem 0.9rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 0.88rem;
    color: #2d3748;
    font-family: inherit;
}
.intro-menu-item:hover { background: rgba(123,104,174,0.10); }

/* Send-to-study feedback toast */
.intro-flash-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 0.55rem 1rem;
    border-radius: 18px;
    font-size: 0.85rem;
    z-index: 10300;
    pointer-events: none;
    animation: intro-toast-fade 1.5s ease;
}
@keyframes intro-toast-fade {
    0% { opacity: 0; transform: translate(-50%, 8px); }
    15% { opacity: 1; transform: translate(-50%, 0); }
    85% { opacity: 1; transform: translate(-50%, 0); }
    100% { opacity: 0; transform: translate(-50%, -8px); }
}

/* Mobile */
@media (max-width: 768px) {
    .intro-overlay-content {
        top: 0;
        left: 0;
        transform: none;
        width: 100vw;
        max-height: 100vh;
        height: 100vh;
        border-radius: 0;
        border-left: none;
    }
    .intro-overlay-body { padding: 0.6rem 0.85rem; font-size: 0.85rem; }
}