upgrade to tailwind v4

Author: Its-Satyajit

package.json

@@ -60,6 +60,7 @@
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",
     "@eslint/js": "^9.18.0",
+    "@tailwindcss/postcss": "^4.0.12",
     "@tailwindcss/typography": "^0.5.16",
     "@tanstack/eslint-plugin-query": "^5.62.16",
     "@types/node": "^22.10.7",
@@ -77,8 +78,8 @@
     "onchange": "^7.1.0",
     "postcss": "^8.5.1",
     "prettier": "^3.4.2",
-    "prettier-plugin-tailwindcss": "^0.6.10",
-    "tailwindcss": "^3.4.17",
+    "prettier-plugin-tailwindcss": "^0.6.11",
+    "tailwindcss": "^4.0.12",
     "typedoc": "^0.27.6",
     "typedoc-github-theme": "^0.2.1",
     "typedoc-plugin-markdown": "^4.4.1",

pnpm-lock.yaml

@@ -1,7 +1,7 @@
 /** @type {import('postcss-load-config').Config} */
 const config = {
   plugins: {
-    tailwindcss: {},
+    '@tailwindcss/postcss': {},
   },
 };
 

postcss.config.mjs

@@ -21,7 +21,7 @@ export default function Header() {
   const router = useRouter();
   const { data: session } = useSession();
   return (
-    <div className="sticky top-0 z-50 bg-white/75 shadow backdrop-blur">
+    <div className="sticky top-0 z-50 bg-white/75 shadow-sm backdrop-blur-sm">
       <div className="container mx-auto flex h-12 items-center justify-between">
         <Home.Link>
           <Logo className="h-full w-auto py-3" />

src/components/section/Header.tsx

@@ -5,18 +5,18 @@ import { cva, type VariantProps } from "class-variance-authority";
 import { cn } from "@/lib/utils";
 
 const buttonVariants = cva(
-  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
+  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-colors focus-visible:outline-hidden focus-visible:ring-1 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
   {
     variants: {
       variant: {
         default:
-          "bg-primary text-primary-foreground shadow hover:bg-primary/90",
+          "bg-primary text-primary-foreground shadow-sm hover:bg-primary/90",
         destructive:
-          "bg-destructive text-destructive-foreground shadow-sm hover:bg-destructive/90",
+          "bg-destructive text-destructive-foreground shadow-xs hover:bg-destructive/90",
         outline:
-          "border border-input bg-background shadow-sm hover:bg-accent hover:text-accent-foreground",
+          "border border-input bg-background shadow-xs hover:bg-accent hover:text-accent-foreground",
         secondary:
-          "bg-secondary text-secondary-foreground shadow-sm hover:bg-secondary/80",
+          "bg-secondary text-secondary-foreground shadow-xs hover:bg-secondary/80",
         ghost: "hover:bg-accent hover:text-accent-foreground",
         link: "text-primary underline-offset-4 hover:underline",
       },

src/components/ui/button.tsx

@@ -13,7 +13,7 @@ const Card = (
 ) => (<div
   ref={ref}
   className={cn(
-    "rounded-xl border bg-card text-card-foreground shadow",
+    "rounded-xl border bg-card text-card-foreground shadow-sm",
     className,
   )}
   {...props}

src/components/ui/card.tsx

@@ -29,7 +29,7 @@ const DropdownMenuSubTrigger = (
 ) => (<DropdownMenuPrimitive.SubTrigger
   ref={ref}
   className={cn(
-    "flex cursor-default select-none items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-none focus:bg-accent data-[state=open]:bg-accent [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
+    "flex cursor-default select-none items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-hidden focus:bg-accent data-[state=open]:bg-accent [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
     inset && "pl-8",
     className,
   )}
@@ -93,7 +93,7 @@ const DropdownMenuItem = (
 ) => (<DropdownMenuPrimitive.Item
   ref={ref}
   className={cn(
-    "relative flex cursor-default select-none items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-none transition-colors focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50 [&>svg]:size-4 [&>svg]:shrink-0",
+    "relative flex cursor-default select-none items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-hidden transition-colors focus:bg-accent focus:text-accent-foreground data-disabled:pointer-events-none data-disabled:opacity-50 [&>svg]:size-4 [&>svg]:shrink-0",
     inset && "pl-8",
     className,
   )}
@@ -114,7 +114,7 @@ const DropdownMenuCheckboxItem = (
 ) => (<DropdownMenuPrimitive.CheckboxItem
   ref={ref}
   className={cn(
-    "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none transition-colors focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+    "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-hidden transition-colors focus:bg-accent focus:text-accent-foreground data-disabled:pointer-events-none data-disabled:opacity-50",
     className,
   )}
   checked={checked}
@@ -142,7 +142,7 @@ const DropdownMenuRadioItem = (
 ) => (<DropdownMenuPrimitive.RadioItem
   ref={ref}
   className={cn(
-    "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none transition-colors focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+    "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-hidden transition-colors focus:bg-accent focus:text-accent-foreground data-disabled:pointer-events-none data-disabled:opacity-50",
     className,
   )}
   {...props}

src/components/ui/dropdown-menu.tsx

@@ -16,7 +16,7 @@ const Input = (
     <input
       type={type}
       className={cn(
-        "flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-base shadow-sm transition-colors file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+        "flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-base shadow-xs transition-colors file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:outline-hidden focus-visible:ring-1 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
         className,
       )}
       ref={ref}

src/components/ui/input.tsx

@@ -20,15 +20,15 @@ const ToastViewport = (
 ) => (<ToastPrimitives.Viewport
   ref={ref}
   className={cn(
-    "fixed top-0 z-[100] flex max-h-screen w-full flex-col-reverse p-4 sm:bottom-0 sm:right-0 sm:top-auto sm:flex-col md:max-w-[420px]",
+    "fixed top-0 z-100 flex max-h-screen w-full flex-col-reverse p-4 sm:bottom-0 sm:right-0 sm:top-auto sm:flex-col md:max-w-[420px]",
     className,
   )}
   {...props}
 />);
 ToastViewport.displayName = ToastPrimitives.Viewport.displayName;
 
 const toastVariants = cva(
-  "group pointer-events-auto relative flex w-full items-center justify-between space-x-2 overflow-hidden rounded-md border p-4 pr-6 shadow-lg transition-all data-[swipe=cancel]:translate-x-0 data-[swipe=end]:translate-x-[var(--radix-toast-swipe-end-x)] data-[swipe=move]:translate-x-[var(--radix-toast-swipe-move-x)] data-[swipe=move]:transition-none data-[state=open]:animate-in data-[state=closed]:animate-out data-[swipe=end]:animate-out data-[state=closed]:fade-out-80 data-[state=closed]:slide-out-to-right-full data-[state=open]:slide-in-from-top-full data-[state=open]:sm:slide-in-from-bottom-full",
+  "group pointer-events-auto relative flex w-full items-center justify-between space-x-2 overflow-hidden rounded-md border p-4 pr-6 shadow-lg transition-all data-[swipe=cancel]:translate-x-0 data-[swipe=end]:translate-x-[var(--radix-toast-swipe-end-x)] data-[swipe=move]:translate-x-[var(--radix-toast-swipe-move-x)] data-[swipe=move]:transition-none data-[state=open]:animate-in data-[state=closed]:animate-out data-[swipe=end]:animate-out data-[state=closed]:fade-out-80 data-[state=closed]:slide-out-to-right-full data-[state=open]:slide-in-from-top-full sm:data-[state=open]:slide-in-from-bottom-full",
   {
     variants: {
       variant: {
@@ -72,7 +72,7 @@ const ToastAction = (
 ) => (<ToastPrimitives.Action
   ref={ref}
   className={cn(
-    "inline-flex h-8 shrink-0 items-center justify-center rounded-md border bg-transparent px-3 text-sm font-medium transition-colors hover:bg-secondary focus:outline-none focus:ring-1 focus:ring-ring disabled:pointer-events-none disabled:opacity-50 group-[.destructive]:border-muted/40 group-[.destructive]:hover:border-destructive/30 group-[.destructive]:hover:bg-destructive group-[.destructive]:hover:text-destructive-foreground group-[.destructive]:focus:ring-destructive",
+    "inline-flex h-8 shrink-0 items-center justify-center rounded-md border bg-transparent px-3 text-sm font-medium transition-colors hover:bg-secondary focus:outline-hidden focus:ring-1 focus:ring-ring disabled:pointer-events-none disabled:opacity-50 group-[.destructive]:border-muted/40 hover:group-[.destructive]:border-destructive/30 hover:group-[.destructive]:bg-destructive hover:group-[.destructive]:text-destructive-foreground focus:group-[.destructive]:ring-destructive",
     className,
   )}
   {...props}
@@ -90,7 +90,7 @@ const ToastClose = (
 ) => (<ToastPrimitives.Close
   ref={ref}
   className={cn(
-    "absolute right-1 top-1 rounded-md p-1 text-foreground/50 opacity-0 transition-opacity hover:text-foreground focus:opacity-100 focus:outline-none focus:ring-1 group-hover:opacity-100 group-[.destructive]:text-red-300 group-[.destructive]:hover:text-red-50 group-[.destructive]:focus:ring-red-400 group-[.destructive]:focus:ring-offset-red-600",
+    "absolute right-1 top-1 rounded-md p-1 text-foreground/50 opacity-0 transition-opacity hover:text-foreground focus:opacity-100 focus:outline-hidden focus:ring-1 group-hover:opacity-100 group-[.destructive]:text-red-300 hover:group-[.destructive]:text-red-50 focus:group-[.destructive]:ring-red-400 focus:group-[.destructive]:ring-offset-red-600",
     className,
   )}
   toast-close=""

src/components/ui/toast.tsx

@@ -1,9 +1,75 @@
-@tailwind base;
-@tailwind components;
-@tailwind utilities;
+@import 'tailwindcss';
 
-body {
-  font-family: Arial, Helvetica, sans-serif;
+@plugin '@tailwindcss/typography';
+@plugin 'tailwindcss-animate';
+
+@custom-variant dark (&:is(.dark *));
+
+@theme {
+  --font-raleway: var(--font-r-sans);
+  --font-raleway-italic: var(--font-r-sans-italic);
+
+  --color-background: hsl(var(--background));
+  --color-foreground: hsl(var(--foreground));
+
+  --color-card: hsl(var(--card));
+  --color-card-foreground: hsl(var(--card-foreground));
+
+  --color-popover: hsl(var(--popover));
+  --color-popover-foreground: hsl(var(--popover-foreground));
+
+  --color-primary: hsl(var(--primary));
+  --color-primary-foreground: hsl(var(--primary-foreground));
+
+  --color-secondary: hsl(var(--secondary));
+  --color-secondary-foreground: hsl(var(--secondary-foreground));
+
+  --color-muted: hsl(var(--muted));
+  --color-muted-foreground: hsl(var(--muted-foreground));
+
+  --color-accent: hsl(var(--accent));
+  --color-accent-foreground: hsl(var(--accent-foreground));
+
+  --color-destructive: hsl(var(--destructive));
+  --color-destructive-foreground: hsl(var(--destructive-foreground));
+
+  --color-border: hsl(var(--border));
+  --color-input: hsl(var(--input));
+  --color-ring: hsl(var(--ring));
+
+  --color-chart-1: hsl(var(--chart-1));
+  --color-chart-2: hsl(var(--chart-2));
+  --color-chart-3: hsl(var(--chart-3));
+  --color-chart-4: hsl(var(--chart-4));
+  --color-chart-5: hsl(var(--chart-5));
+
+  --radius-lg: var(--radius);
+  --radius-md: calc(var(--radius) - 2px);
+  --radius-sm: calc(var(--radius) - 4px);
+}
+
+/*
+  The default border color has changed to `currentColor` in Tailwind CSS v4,
+  so we've added these compatibility styles to make sure everything still
+  looks the same as it did with Tailwind CSS v3.
+
+  If we ever want to remove these styles, we need to add an explicit border
+  color utility to any element that depends on these defaults.
+*/
+@layer base {
+  *,
+  ::after,
+  ::before,
+  ::backdrop,
+  ::file-selector-button {
+    border-color: var(--color-gray-200, currentColor);
+  }
+}
+
+@layer utilities {
+  body {
+    font-family: Arial, Helvetica, sans-serif;
+  }
 }
 
 @layer base {