@container queries
Size queries in Container Queries provide a way to query the size of a container, and conditionally apply CSS to the content of that container.
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Color Contrast
The color-contrast() functional notation takes a color value and compares it to a list of other color values, selecting the one with the highest contrast from the list.
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@custom-media
Before @custom-media, media queries had to repeat themselves over and over, or rely on preprocessors to generate the proper output based on static variables during build time.
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