/* Without a script there is nothing to toggle, so the CSS the design kit ships takes over: no burger, the bar as a static list, and the panels on hover and :focus-within. `:focus-within` is what makes it keyboard operable - the trigger itself is inside the group, so tabbing to it opens the panel and the links behind it become reachable. Written out rather than expressed in utilities: this block is left untouched by Astro (`is:inline`), so it is plain CSS. 1024px is `--breakpoint-lg`, which a media query cannot read from a variable. **`@layer base` and `!important` together are load-bearing, and neither works without the other.** The bar and the panels carry the `hidden` attribute in the markup, so that a drawer does not flash open on a phone in the moment between parse and hydration. Tailwind's preflight implements that attribute as `[hidden]:where(:not([hidden="until-found"])) { display: none !important }` - an important declaration, and one that sits inside `@layer base`. For *important* declarations the cascade reverses the layer order: an important declaration in a layer beats an important declaration in no layer at all, whatever its specificity. So an unlayered `display: flex !important` here loses to preflight, and losing it means a JavaScript-less visitor gets a header with no navigation in it at all. Declaring these rules into `base` puts them in the same layer as preflight, where specificity decides again and `[data-mega-menu] [data-menu-bar]` (0,2,0) beats `[hidden]` (0,1,0). These rules are inside `<noscript>`, so they only ever apply where there is no script to remove the attribute. */ @layer base { [data-mega-menu] [data-menu-toggle], [data-mega-menu] [data-menu-close] { display: none; } [data-mega-menu] [data-menu-bar] { display: flex !important; } [data-mega-menu] [data-menu-group]:hover [data-menu-panel], [data-mega-menu] [data-menu-group]:focus-within [data-menu-panel] { display: block !important; } @media (max-width: 1023.98px) { [data-mega-menu] [data-menu-bar] { display: block !important; position: static; overflow: visible; padding: 0; background: transparent; } } }

26. August 2020 · Kurse

phænovum-Sommerferienkurs: Den Himmel erleben - Einführung in die praktische Astronomie

Im Astronomie-Kurs, der in den Sommerferien am 17.8., 20.8. und 21.8.2020 stattfand und von Herrn Gohn, sowie Herrn Klein vom Schülerforschungszentrum phænovum geleitet wurde, lernten die…

Bei Nacht beobachten mehrere Personen im roten Licht mit Teleskopen neben der Beobachtungshütte, am Horizont stehen Windräder

Im Astronomie-Kurs, der in den Sommerferien am 17.8., 20.8. und 21.8.2020 stattfand und von Herrn Gohn, sowie Herrn Klein vom Schülerforschungszentrum phænovum geleitet wurde, lernten die Schüler*innen viel über den Nachthimmel und wie man ihn beobachten kann. Ein Bericht von Kursteilnehmerin Saskia Lange.

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