.tunebook-card {
    --tb-bg:           transparent;
    --tb-bg-pages:     transparent;
    --tb-border:       currentColor;
    --tb-border-light: currentColor;
    --tb-text:         inherit;
    --tb-text-meta:    inherit;
    --tb-text-muted:   inherit;
    --tb-accent:       currentColor;
    --tb-btn-hover:    transparent;
    --tb-font-serif:   inherit;
    --tb-font-sans:    inherit;
    --tb-radius:     2px;
    --tb-shadow:     0 2px 18px rgba(60, 40, 10, 0.10);
}

.tunebook-card {
    max-width: 780px;
    margin: 2rem auto;
    background: var(--tb-bg);
    border: 1px solid var(--tb-border);
    border-radius: var(--tb-radius);
    box-shadow: var(--tb-shadow);
    overflow: hidden;
    font-family: var(--tb-font-sans);
    font-weight: 300;
    color: var(--tb-text);
}

.tunebook-header {
    padding: 1.6rem 2rem 1.2rem;
    border-bottom: 1px solid var(--tb-border-light);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.tunebook-title {
    font-family: var(--tb-font-serif);
    font-size: 1.55rem;
    font-weight: 600;
    line-height: 1.2;
    color: var(--tb-text);
    letter-spacing: 0.01em;
    margin: 0 0 0.3rem;
}

.tunebook-meta {
    font-size: 0.82rem;
    color: var(--tb-text-meta);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.tunebook-text-meta {
    font-size: 0.80rem;
    color: var(--tb-text-muted);
    margin-top: 0.25rem;
    font-style: italic;
}

.tunebook-actions {
    flex-shrink: 0;
}

.tunebook-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    padding: 0.45em 0.95em;
    font-family: var(--tb-font-sans);
    font-size: 0.78rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-decoration: none;
    border-radius: var(--tb-radius);
    border: 1px solid var(--tb-border);
    color: var(--tb-text-meta);
    background: transparent;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    white-space: nowrap;
    cursor: pointer;
}

.tunebook-btn:hover {
    background: var(--tb-btn-hover);
    border-color: var(--tb-text-meta);
    color: var(--tb-text);
}

.tunebook-btn svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
}

.tunebook-pages {
    padding: 1.5rem 2rem;
    background: var(--tb-bg-pages);
    border-bottom: 1px solid var(--tb-border-light);
}

.tunebook-pages img {
    width: 100%;
    display: block;
    border: 1px solid var(--tb-border);
    background: white;
}

.tunebook-pages img + img {
    margin-top: 1rem;
}

.tunebook-page-note {
    font-size: 0.75rem;
    color: var(--tb-text-muted);
    text-align: right;
    margin-top: 0.6rem;
    letter-spacing: 0.04em;
}

.tunebook-audio {
    padding: 1.1rem 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid #333333;
    flex-wrap: wrap;
    background-color: #cccccc;
    border: 1px solid var(--tb-text-muted);
}

.tunebook-audio-label {
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--tb-text-muted);
    flex-shrink: 0;
}

.tunebook-audio-wrap {
    flex: 1;
    min-width: 200px;
}

.tunebook-controls {
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.tunebook-play-btn {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--tb-accent);
    border: 1px solid #333333;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.15s;
    padding: 0;
}

.tunebook-play-btn:hover {
    background: #dc76c2;
}

.tunebook-play-btn svg {
    width: 13px;
    height: 13px;
    fill: var(--tb-bg);
}

.tunebook-play-btn .icon-play {
    margin-left: 2px;
}

.tunebook-timeline {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;    
}

.tunebook-progress {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 3px;
    background: #eeeeee;
    border-radius: 2px;
    border: 1px solid #333333;
    outline: none;
    cursor: pointer;
}

.tunebook-progress::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: #cccccc;
    cursor: pointer;
}

.tunebook-progress::-moz-range-thumb {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: #cccccc;
    border: 1px solid #333333;
    cursor: pointer;
    
}

.tunebook-time {
    font-size: 0.7rem;
    color: var(--tb-text-muted);
    letter-spacing: 0.04em;
    display: flex;
    justify-content: space-between;
}

.tunebook-footer {
    padding: 0.8rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.tunebook-btn-full {
    width: 100%;
    justify-content: center;
}

.tunebook-pdf {
    padding: 0.8rem 0;
}

@media ( max-width: 520px ) {
    .tunebook-header,
    .tunebook-pages,
    .tunebook-audio,
    .tunebook-footer {
        padding-left: 1.2rem;
        padding-right: 1.2rem;
    }

    .tunebook-header {
        flex-direction: column;
    }

    .tunebook-title {
        font-size: 1.25rem;
    }
}


.tunebook-archive {
    max-width: 820px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.tunebook-archive-header {
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--tb-border);
    padding-bottom: 1.2rem;
}

.tunebook-archive-title {
    font-family: var(--tb-font-serif);
    font-size: 2rem;
    font-weight: 600;
    color: var(--tb-text);
    margin: 0 0 0.4rem;
}

.tunebook-archive-description {
    font-size: 0.9rem;
    color: var(--tb-text-meta);
}

.tunebook-archive .tunebook-card {
    margin-bottom: 2.5rem;
}

.tunebook-none {
    color: var(--tb-text-muted);
    font-style: italic;
}

.tunebook-archive .nav-links {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 2rem;
    font-size: 0.85rem;
}

.tunebook-archive .page-numbers {
    padding: 0.4em 0.8em;
    border: 1px solid var(--tb-border);
    color: var(--tb-text-meta);
    text-decoration: none;
    border-radius: var(--tb-radius);
}

.tunebook-archive .page-numbers.current,
.tunebook-archive .page-numbers:hover {
    background: var(--tb-btn-hover);
    color: var(--tb-text);
    border-color: var(--tb-text-meta);
}