Tailwind documentation

These topics are Tailwind's own and are not verified by this repository. Read them in Tailwind's documentation for the version you use (the template pins 4.3.3):

• How Tailwind v4 finds class names in source files, and why complete class names are required.
• The CSS-first configuration that replaces tailwind.config.js: @theme, @source, and @custom-variant (for a class-based dark: variant).
• The upgrade guide from v3 to v4, including the replacement of the @tailwind directives and PostCSS setup.
• @apply, @layer, and arbitrary values and variants.
• The tailwind-merge package, if you want conflicting utilities resolved in cn().