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(width<=640px){.learnerAccessRequiredPanel{grid-template-columns:1fr;padding:1rem}.learnerAccessRequiredMascot{display:none}.learnerAccessRequiredActions [data-slot=button]{width:100%}}.legacyCompatScreenHost[data-screen="8"],.legacyCompatScreenHost[data-screen="9"],.legacyCompatScreenHost[data-screen="10"]{max-width:none;padding:0}.legacyBookHeaderBox{box-sizing:border-box;align-items:center;width:100%;min-width:0;max-width:960px;height:64px;margin:auto;padding-left:1.25rem;padding-right:1.25rem;display:flex}.legacyBookBackButton{box-sizing:border-box;color:#391d0c;cursor:pointer;width:44px;min-width:44px;height:44px;min-height:44px;box-shadow:none;background-color:#0000;border:0;outline:0;flex:0 0 44px;justify-content:center;align-items:center;margin-right:1.25rem;padding:0;display:flex}.legacyBookBackButton:hover{color:#f8b430}.legacyBookBackButton 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var(--lms-color-border-strong);border-radius:.55rem;grid-template-columns:repeat(2,1.45rem);gap:.4rem;padding:.5rem;display:grid;position:absolute;top:calc(100% + .4rem);right:0;box-shadow:0 .5rem 1.25rem #00000024}.flipbookAnnotationColorSwatch{cursor:pointer;border:2px solid var(--lms-color-surface-card);width:1.45rem;height:1.45rem;box-shadow:0 0 0 1px var(--lms-color-border-strong);border-radius:999px;padding:0}.flipbookAnnotationColorSwatch:hover,.flipbookAnnotationColorSwatch:focus-visible,.flipbookAnnotationColorSwatch.isSelected{box-shadow:0 0 0 2px var(--lms-color-ink-strong)}.flipbookToolbarZoom{background-color:var(--lms-color-surface-card);border:1px solid var(--lms-color-border-strong);border-radius:.5rem;align-items:center;display:flex;overflow:hidden}.flipbookToolbarZoomValue{min-width:3.5rem;color:var(--lms-color-ink-strong);border-right:1px solid var(--lms-color-border-subtle);border-left:1px solid var(--lms-color-border-subtle);justify-content:center;align-items:center;padding:.8rem .75rem;font-size:.72rem;font-weight:800;display:flex}.flipbookProgress{flex:none;align-self:center;align-items:center;display:flex;position:relative}.flipbookProgressPreview{z-index:6;background-color:var(--lms-color-surface-card);border:1px solid var(--lms-color-border-strong);box-shadow:var(--lms-shadow-surface);border-radius:4px;padding:4px;position:absolute;top:calc(100% + .75rem);left:50%;transform:translate(-50%)}.flipbookProgressPreviewMedia{background-color:var(--lms-color-surface-muted);justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}.flipbookProgressPreviewImage{object-fit:contain;width:100%;height:100%;display:block}.flipbookProgressPreviewImage.isSplit{width:50%}.flipbookProgressPreviewLabel{color:var(--lms-color-ink-strong);text-align:center;margin:0;padding-top:3px;font-size:.68rem;font-weight:800}.flipbookProgressSpinner{border:2px 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