tils-first-weather-widget/demo/src/style.css

An example development EXB widget (Grant Caroll, spatial-innovation.co.nz)

@import 'https://js.arcgis.com/4.28/@arcgis/core/assets/esri/themes/light/main.css';
@import 'https://s3-us-west-1.amazonaws.com/patterns.esri.com/files/calcite-web/1.2.5/css/calcite-web.min.css';
#viewDiv {
    padding: 0;
    margin: 0;
    height: 100vh;
    width: 100vw;
}