Benjamin Franzke 9b266e4349 docs: add dark mode ... Respect the user agent property `prefers-color-scheme` by rendering the documentation in dark mode, if requested. Reorganise CSS to store the color palette into CSS variables and reference these from another set of CSS variables that are dynamically switched based on the prefers-color-scheme media query. Light mode variables stay they same as before, but to ease color mixing, the current RGB values have been transformed to HSL (using chrome devtools). The current body background is now --sd-gray-extralight, the current body color is now --sd-gray-extradark. Other gray-variations, needed for dark-mode constrasts are derived from these colors using HSL lightness shifting. The systemd brand black color is used as dark mode background and a matching extralight gray font color has been selected. The link font-weight is reduced to 400 in dark mode, as the green color on dark ground becomes to overwhelming with a bold font. The systemd logo color is dynamically swapped by using the special fill value `currentColor` for dark/light-mode depending parts – as per specification on brand.systemd.io		2022-05-17 23:00:18 +02:00
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systemd-logo.svg	docs: add dark mode	2022-05-17 23:00:18 +02:00