html, body{
    padding: 0;
    margin: 0;
    height: 100%;
    width: 100%;
    font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica Neue, 
        Arial, Noto Sans, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji;
    font-size: 13px;
}