.mobile-app-bar{z-index:1000001;border-block-end:1px solid var(--Border-Neutral-subtle);background:var(--Base-bg-base);min-block-size:64px;color:var(--Text-Neutral-primary);font-family:var(--Body-font-family);align-items:center;gap:12px;padding:8px 16px;display:none;position:sticky;inset-block-start:0}.mobile-app-bar__logo{border-radius:var(--Radius-sm);flex:none}.mobile-app-bar__copy{flex:1;min-inline-size:0;display:grid}.mobile-app-bar__copy strong{font-size:var(--Body-font-size-md);line-height:var(--Body-font-line-height-md)}.mobile-app-bar__copy span{color:var(--Text-Neutral-secondary);font-size:var(--Body-font-size-sm);line-height:var(--Body-font-line-height-sm);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.mobile-app-bar__open{white-space:nowrap;flex:none}.mobile-app-bar__close{border-radius:var(--Radius-full);block-size:32px;inline-size:32px;color:var(--Icon-Neutral-primary);cursor:pointer;background:0 0;border:0;flex:none;place-items:center;padding:0;display:grid}.mobile-app-bar__close:focus-visible{outline:2px solid var(--Border-Brand-focus);outline-offset:2px}.mobile-app-modal{display:none}@media (max-width:767px){.mobile-app-bar{display:flex}:where(.home-page,.chapter-app-shell):has(>.mobile-app-bar)>.site-header{inset-block-start:64px}.mobile-app-modal[open]{display:block}.mobile-app-modal__panel{text-align:center;gap:16px}.mobile-app-modal__title{margin-block-start:112px}.mobile-app-modal__body{justify-items:center;gap:24px;display:grid}.mobile-app-modal__logo{border-radius:var(--Radius-lg);position:absolute;inset-block-start:24px;inset-inline-start:50%;transform:translate(-50%)}.mobile-app-modal__body p{color:var(--Text-Neutral-secondary);font-family:var(--Body-font-family);font-size:var(--Body-font-size-md);line-height:var(--Body-font-line-height-md);margin:0}.mobile-app-modal__open{inline-size:100%}}