.reader-shell {
    max-width: min(1180px, calc(100vw - 2rem));
    margin: 0 auto;
}

.reader-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--color-surface-strong);
    box-shadow: var(--shadow);
}

.reader-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.5rem;
}

.reader-content {
    font-family: var(--font-reader);
    font-size: clamp(1.08rem, 2vw, 1.22rem);
    line-height: 1.9;
    padding: clamp(1.25rem, 3vw, 3rem);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    background: #fffdf7;
    box-shadow: var(--shadow);
}

.reader-content--image {
    background: #f8fafc;
}

.reader-block + .reader-block {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.reader-block-title {
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #334155;
    margin-bottom: 0.75rem;
}

.reader-text {
    white-space: normal;
}

.reader-gallery {
    display: grid;
    gap: 1.25rem;
}

.reader-image-frame {
    margin: 0;
    padding: clamp(0.5rem, 2vw, 1rem);
    border-radius: var(--radius-md);
    background: #ffffff;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.reader-image {
    display: block;
    width: 100%;
    height: auto;
    max-height: none;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: #e2e8f0;
}

.reader-image-frame figcaption {
    margin-top: 0.65rem;
    font-family: var(--font-ui);
    font-size: 0.82rem;
    color: var(--color-text-muted);
    text-align: center;
}

.reader-pdf {
    font-family: var(--font-ui);
}

.reader-pdf-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0;
    padding: 1rem 1.15rem;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    color: #e5edf8;
    background:
        linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(30, 41, 59, 0.94)),
        radial-gradient(circle at top left, rgba(245, 158, 11, 0.25), transparent 34%);
    border: 1px solid rgba(148, 163, 184, 0.28);
    border-bottom: 0;
}

.reader-pdf-toolbar .reader-block-title {
    color: #ffffff;
    margin-bottom: 0.25rem;
}

.reader-pdf-toolbar .text-secondary {
    color: var(--color-text-on-dark-muted) !important;
}

.reader-pdf-toolbar .btn {
    border-radius: var(--radius-pill);
    font-weight: 700;
}

.reader-pdf-toolbar .btn-outline-secondary {
    color: #e2e8f0;
    border-color: rgba(226, 232, 240, 0.45);
}

.reader-pdf-toolbar .btn-outline-secondary:hover {
    color: #0f172a;
    background: #f8fafc;
}

.reader-pdf-shell {
    position: relative;
    overflow: hidden;
    min-height: min(82vh, 920px);
    padding: clamp(0.65rem, 1.5vw, 1rem);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    border: 1px solid rgba(148, 163, 184, 0.28);
    background:
        linear-gradient(180deg, #182233 0%, #0f172a 100%),
        repeating-linear-gradient(45deg, rgba(255,255,255,0.04) 0 1px, transparent 1px 9px);
    box-shadow: var(--shadow-lg);
}

.reader-pdf-viewer {
    display: block;
    width: 100%;
    height: min(82vh, 920px);
    min-height: 720px;
    border: 0;
    border-radius: var(--radius-sm);
    background: #f8fafc;
    box-shadow: 0 18px 42px rgba(2, 6, 23, 0.35);
}

.reader-pdf-fallback,
.reader-empty {
    margin: 0.85rem 0 0;
    font-family: var(--font-ui);
    color: var(--color-text-muted);
}

.reader-pdf-fallback {
    font-size: 0.92rem;
    text-align: center;
}

.reader-audio {
    font-family: var(--font-ui);
    padding: 1.25rem;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(31, 111, 235, 0.1), rgba(255, 191, 71, 0.12));
    border: 1px solid rgba(31, 111, 235, 0.16);
}

.reader-audio-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
    gap: 1rem;
    align-items: start;
}

.reader-audio-main {
    min-width: 0;
}

.reader-audio-now-playing {
    margin-bottom: 0.85rem;
    padding: 0.9rem 1rem;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.62);
    border: 1px solid rgba(255, 255, 255, 0.75);
}

.reader-audio-now-label {
    margin-bottom: 0.25rem;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.reader-audio-now-title {
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--color-text);
}

.reader-audio audio {
    display: block;
    margin-top: 0.35rem;
    border-radius: var(--radius-pill);
}

.reader-audio-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-top: 0.9rem;
}

.reader-audio-preferences {
    margin-top: 0.95rem;
}

.reader-audio-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    font-size: 0.92rem;
    color: var(--color-text);
}

.reader-audio-playlist {
    padding: 1rem;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.66);
    border: 1px solid rgba(255, 255, 255, 0.78);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.reader-audio-playlist-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.9rem;
}

.reader-audio-playlist-list {
    display: grid;
    gap: 0.6rem;
    max-height: 420px;
    overflow: auto;
    padding-right: 0.25rem;
}

.reader-playlist-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.85rem;
    width: 100%;
    padding: 0.85rem 0.95rem;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: var(--radius-sm);
    background: #ffffff;
    text-align: left;
    transition: border-color var(--motion-fast), transform var(--motion-fast), box-shadow var(--motion-fast);
}

.reader-playlist-item:hover:not(:disabled),
.reader-playlist-item.is-active {
    border-color: rgba(31, 111, 235, 0.4);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.reader-playlist-item.is-active {
    background: linear-gradient(135deg, rgba(31, 111, 235, 0.08), rgba(255, 191, 71, 0.08));
}

.reader-playlist-item.is-disabled {
    opacity: 0.62;
    cursor: not-allowed;
}

.reader-playlist-item-main {
    display: grid;
    gap: 0.2rem;
    min-width: 0;
}

.reader-playlist-item-number {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--color-text-muted);
}

.reader-playlist-item-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.reader-playlist-item-state {
    flex-shrink: 0;
    font-size: 0.76rem;
    font-weight: 700;
    color: var(--color-brand);
}

.reader-playlist-item.is-disabled .reader-playlist-item-state {
    color: var(--color-text-soft);
}

.reader-bottom-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.reader-side-card {
    padding: 1.25rem;
}

@media (max-width: 767.98px) {
    .reader-header,
    .reader-pdf-toolbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .reader-actions {
        justify-content: flex-start;
    }

    .reader-content {
        padding: 1rem;
        border-radius: var(--radius-md);
    }

    .reader-audio-shell {
        grid-template-columns: 1fr;
    }

    .reader-audio-playlist-head {
        flex-direction: column;
    }

    .reader-pdf-viewer {
        height: 72vh;
        min-height: 520px;
    }

    .reader-pdf-shell {
        min-height: 520px;
    }
}