body.library-document {
    --library-bg: #f3f1ee;
    --library-surface: #ffffff;
    --library-text: #1d1d1f;
    --library-muted: #6b6b70;
    --library-border: #e2ded8;
    --library-accent: #1d1d1f;
    --library-accent-text: #ffffff;

    margin: 0;
    min-height: 100vh;
    background: var(--library-bg);
    color: var(--library-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    flex-direction: column;
}

.library-header {
    background: var(--library-surface);
    border-bottom: 1px solid var(--library-border);
}

.library-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 16px;
}

.library-header__brand {
    color: inherit;
    font-weight: 700;
    text-decoration: none;
}

.library-header__logo {
    display: block;
    max-height: 36px;
    width: auto;
}

.library-main {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 16px 32px;
    box-sizing: border-box;
}

.library-title {
    margin: 0 0 20px;
    font-size: 22px;
    line-height: 1.3;
    text-align: center;
}

.library-viewer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.library-viewer__stage {
    width: 100%;
    max-width: 1100px;
}

.library-viewer__book {
    margin: 0 auto;
}

.library-sheet {
    background: var(--library-surface);
    overflow: hidden;
}

.library-sheet__canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.library-viewer__status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 24px 0;
    color: var(--library-muted);
    font-size: 15px;
}

.library-viewer__status[hidden] {
    display: none;
}

.library-viewer__status--error .library-viewer__spinner {
    display: none;
}

.library-viewer__spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--library-border);
    border-top-color: var(--library-text);
    border-radius: 50%;
    animation: library-spin 0.8s linear infinite;
}

@keyframes library-spin {
    to {
        transform: rotate(360deg);
    }
}

.library-viewer__controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.library-viewer__controls[hidden] {
    display: none;
}

.library-viewer__counter {
    min-width: 72px;
    text-align: center;
    font-variant-numeric: tabular-nums;
    color: var(--library-muted);
}

.library-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    padding: 0 16px;
    border: 1px solid var(--library-border);
    border-radius: 999px;
    background: var(--library-surface);
    color: var(--library-text);
    font: inherit;
    font-size: 15px;
    text-decoration: none;
    cursor: pointer;
}

.library-button:disabled {
    opacity: 0.4;
    cursor: default;
}

.library-button--primary {
    border-color: var(--library-accent);
    background: var(--library-accent);
    color: var(--library-accent-text);
    font-weight: 600;
}

.library-empty {
    text-align: center;
    color: var(--library-muted);
}

@media (min-width: 768px) {
    .library-title {
        font-size: 28px;
    }
}