/* Injected by mdbook_narrated_videos preprocessor — responsive narrated-video section. */

/*
 * mdBook sets :root to 62.5% so 1rem = 10px, then body { font-size: 1.6rem } = 16px.
 * Tab text matches related-card base (1.35rem ≈ 13.5px).
 * Avatar uses fixed rem values to avoid the em-cascade shrink problem.
 */

.narrated-videos {
    margin-top: 0.5rem;
}

.narrated-videos h1 {
    margin-top: 0;
    margin-bottom: 0.75rem;
}

/* ── Tab strip ─────────────────────────────────────────────────────────────── */

.nv-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--table-border-color);
}

.nv-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 1.1rem;
    border: none;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    background: none;
    cursor: pointer;
    color: var(--fg);
    font-size: 1.35rem;
    font-family: inherit;
    transition: color 0.15s, border-color 0.15s;
    border-radius: 4px 4px 0 0;
}

.nv-tab:hover {
    color: var(--links);
    background: var(--quote-bg);
}

.nv-tab--active {
    border-bottom-color: var(--links);
    color: var(--links);
    font-weight: 600;
}

/* ── Avatar circle ──────────────────────────────────────────────────────────── */

.nv-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    color: #fff;
    flex-shrink: 0;
    line-height: 1;
}

/* ── Panel visibility ───────────────────────────────────────────────────────── */

.nv-panel--hidden {
    display: none;
}

/* ── Responsive 16:9 video wrapper ─────────────────────────────────────────── */

.nv-video-wrap {
    position: relative;
    width: 100%;
    max-width: 560px;
    margin: 0 auto;
    aspect-ratio: 16 / 9;
    border-radius: 6px;
    overflow: hidden;
}

.nv-video-wrap iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* ── Mobile adjustments ─────────────────────────────────────────────────────── */

@media (max-width: 480px) {
    .nv-tab {
        padding: 0.4rem 0.8rem;
        font-size: 1.2rem;
    }

    .nv-avatar {
        width: 2.6rem;
        height: 2.6rem;
        font-size: 1rem;
    }
}