Neovim: Better distinguish popup windows form background

nvim/init.lua

@@ -651,6 +651,12 @@ require('lazy').setup({
       luasnip.config.setup {}
 
       cmp.setup {
+        window = {
+          -- Optionally add a border to the completions windows.
+          -- Does not affect the <shift>-k window.
+          -- completion = cmp.config.window.bordered(),
+          -- documentation = cmp.config.window.bordered(),
+        },
         snippet = {
           expand = function(args)
             luasnip.lsp_expand(args.body)
@@ -756,6 +762,14 @@ require('lazy').setup({
         telescope = true,
         which_key = true,
       },
+      custom_highlights = function(C)
+        return {
+          WinSeparator = { fg = C.pink },
+          NormalFloat = { bg = C.crust },
+          Pmenu = { bg = C.crust },
+          PmenuSel = { fg = C.text, bg = C.surface0, style = { 'bold' } },
+        }
+      end,
     },
     init = function()
       vim.cmd.colorscheme 'catppuccin'