html{scroll-behavior:smooth;overscroll-behavior-y:contain}:is(html:has([data-demo-viewer]),body:has([data-demo-viewer])){overscroll-behavior:none;height:100%;overflow:hidden}body{font-family:var(--font-be-vietnam-pro), Arial, sans-serif;margin:0}.demo-preview-shell{flex-direction:column;height:100dvh;display:flex}*,:before,:after{box-sizing:border-box}@media (max-width:560px){html{scrollbar-width:none}html::-webkit-scrollbar{display:none}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}