shellphone.app/app/mailers/renderer/html/templates/tailwind.css

/* Your custom CSS resets for email */
@import "app/mailers/renderer/html/custom/reset";

/* Tailwind components that are generated by plugins */
@import "tailwindcss/components";

/**
 * @import here any custom components - classes that you'd want loaded
 * before the Tailwind utilities, so that the utilities could still
 * override them.
*/
@import "app/mailers/renderer/html/custom/postmark";

/* Tailwind utility classes */
@import "tailwindcss/utilities";

/* Your custom utility classes */
@import "app/mailers/renderer/html/custom/utilities";