feat: today embeds

src/stitches.config.ts

@@ -1,4 +1,4 @@
-import { amberDark, slate, slateDark } from '@radix-ui/colors';
+import { amberDark, slate, slateDark, slateDarkA } from '@radix-ui/colors';
 import { createBorderStyles, createColors } from 'bepaint';
 
 // this isn't really a stitches config, but the object is compliant
@@ -6,5 +6,8 @@ export const theme = {
   colors: createColors(slateDark),
   borderStyles: createBorderStyles(slateDark),
 };
+export const themeTransparent = {
+  colors: createColors(slateDarkA),
+};
 export const themeLight = { colors: createColors(slate) };
 export const themeAmber = { colors: createColors(amberDark) };