[docs] Full Tailwind v3 compatibility

docs/src/app/(public)/(content)/react/components/accordion/demos/hero/tailwind/index.tsx

@@ -6,12 +6,12 @@ export default function ExampleAccordion() {
     <Accordion.Root className="flex w-96 max-w-[calc(100vw-8rem)] flex-col justify-center text-gray-900">
       <Accordion.Item className="border-b border-gray-200">
         <Accordion.Header>
-          <Accordion.Trigger className="group flex w-full cursor-pointer items-baseline justify-between gap-4 py-2 text-left font-medium focus-visible:outline-2 focus-visible:outline-blue-800">
+          <Accordion.Trigger className="group flex w-full cursor-pointer items-baseline justify-between gap-4 py-2 text-left font-medium focus-visible:outline focus-visible:outline-2 focus-visible:outline-blue-800">
             What is Base UI?
             <PlusIcon className="mr-2 size-3 shrink-0 transition-all ease-out group-data-[panel-open]:scale-110 group-data-[panel-open]:rotate-45" />
           </Accordion.Trigger>
         </Accordion.Header>
-        <Accordion.Panel className="h-[var(--accordion-panel-height)] overflow-hidden text-base text-gray-600 transition-[height] ease-out [[data-starting-style],[data-ending-style]]:h-0">
+        <Accordion.Panel className="h-[var(--accordion-panel-height)] overflow-hidden text-base text-gray-600 transition-[height] ease-out data-[ending-style]:h-0 data-[starting-style]:h-0">
           <div className="pb-3">
             Base UI is a library of high-quality unstyled React components for design
             systems and web apps.
@@ -21,12 +21,12 @@ export default function ExampleAccordion() {
 
       <Accordion.Item className="border-b border-gray-200">
         <Accordion.Header>
-          <Accordion.Trigger className="group flex w-full cursor-pointer items-baseline justify-between gap-4 py-2 text-left font-medium focus-visible:outline-2 focus-visible:outline-blue-800">
+          <Accordion.Trigger className="group flex w-full cursor-pointer items-baseline justify-between gap-4 py-2 text-left font-medium focus-visible:outline focus-visible:outline-2 focus-visible:outline-blue-800">
             How do I get started?
             <PlusIcon className="mr-2 size-3 shrink-0 transition-all ease-out group-data-[panel-open]:scale-110 group-data-[panel-open]:rotate-45" />
           </Accordion.Trigger>
         </Accordion.Header>
-        <Accordion.Panel className="h-[var(--accordion-panel-height)] overflow-hidden text-base text-gray-600 transition-[height] ease-out [[data-starting-style],[data-ending-style]]:h-0">
+        <Accordion.Panel className="h-[var(--accordion-panel-height)] overflow-hidden text-base text-gray-600 transition-[height] ease-out data-[ending-style]:h-0 data-[starting-style]:h-0">
           <div className="pb-3">
             Head to the “Quick start” guide in the docs. If you’ve used unstyled
             libraries before, you’ll feel at home.
@@ -36,12 +36,12 @@ export default function ExampleAccordion() {
 
       <Accordion.Item className="border-b border-gray-200">
         <Accordion.Header>
-          <Accordion.Trigger className="group flex w-full cursor-pointer items-baseline justify-between gap-4 py-2 text-left font-medium focus-visible:outline-2 focus-visible:outline-blue-800">
+          <Accordion.Trigger className="group flex w-full cursor-pointer items-baseline justify-between gap-4 py-2 text-left font-medium focus-visible:outline focus-visible:outline-2 focus-visible:outline-blue-800">
             Can I use it for my project?
             <PlusIcon className="mr-2 size-3 shrink-0 transition-all ease-out group-data-[panel-open]:scale-110 group-data-[panel-open]:rotate-45" />
           </Accordion.Trigger>
         </Accordion.Header>
-        <Accordion.Panel className="h-[var(--accordion-panel-height)] overflow-hidden text-base text-gray-600 transition-[height] ease-out [[data-starting-style],[data-ending-style]]:h-0">
+        <Accordion.Panel className="h-[var(--accordion-panel-height)] overflow-hidden text-base text-gray-600 transition-[height] ease-out data-[ending-style]:h-0 data-[starting-style]:h-0">
           <div className="pb-3">Of course! Base UI is free and open source.</div>
         </Accordion.Panel>
       </Accordion.Item>

docs/src/app/(public)/(content)/react/components/alert-dialog/demos/hero/tailwind/index.tsx

@@ -4,23 +4,23 @@ import { AlertDialog } from '@base-ui-components/react/alert-dialog';
 export default function ExampleAlertDialog() {
   return (
     <AlertDialog.Root>
-      <AlertDialog.Trigger className="flex h-10 items-center justify-center rounded-md border border-gray-200 bg-gray-50 px-3.5 text-base font-medium text-red-800 select-none hover:bg-gray-100 focus-visible:outline-2 focus-visible:-outline-offset-1 focus-visible:outline-blue-800 active:bg-gray-100">
+      <AlertDialog.Trigger className="flex h-10 items-center justify-center rounded-md border border-gray-200 bg-gray-50 px-3.5 text-base font-medium text-red-800 select-none hover:bg-gray-100 focus-visible:outline focus-visible:outline-2 focus-visible:-outline-offset-1 focus-visible:outline-blue-800 active:bg-gray-100">
         Discard draft
       </AlertDialog.Trigger>
       <AlertDialog.Portal>
-        <AlertDialog.Backdrop className="fixed inset-0 bg-black opacity-20 transition-all duration-150 dark:opacity-70 [[data-starting-style],[data-ending-style]]:opacity-0" />
-        <AlertDialog.Popup className="fixed top-1/2 left-1/2 -mt-8 w-96 max-w-[calc(100vw-3rem)] -translate-1/2 rounded-lg bg-gray-50 p-6 text-gray-900 outline outline-gray-200 transition-all duration-150 dark:outline-gray-300 [[data-starting-style],[data-ending-style]]:scale-90 [[data-starting-style],[data-ending-style]]:opacity-0">
+        <AlertDialog.Backdrop className="fixed inset-0 bg-black opacity-20 transition-all duration-150 data-[ending-style]:opacity-0 data-[starting-style]:opacity-0 dark:opacity-70" />
+        <AlertDialog.Popup className="fixed top-1/2 left-1/2 -mt-8 w-96 max-w-[calc(100vw-3rem)] -translate-x-1/2 -translate-y-1/2 rounded-lg bg-gray-50 p-6 text-gray-900 outline outline-1 outline-gray-200 transition-all duration-150 data-[ending-style]:scale-90 data-[ending-style]:opacity-0 data-[starting-style]:scale-90 data-[starting-style]:opacity-0 dark:outline-gray-300">
           <AlertDialog.Title className="-mt-1.5 mb-1 text-lg font-medium">
             Discard draft?
           </AlertDialog.Title>
           <AlertDialog.Description className="mb-6 text-base text-gray-600">
             You can’t undo this action.
           </AlertDialog.Description>
           <div className="flex justify-end gap-4">
-            <AlertDialog.Close className="flex h-10 items-center justify-center rounded-md border border-gray-200 bg-gray-50 px-3.5 text-base font-medium text-gray-900 select-none hover:bg-gray-100 focus-visible:outline-2 focus-visible:-outline-offset-1 focus-visible:outline-blue-800 active:bg-gray-100">
+            <AlertDialog.Close className="flex h-10 items-center justify-center rounded-md border border-gray-200 bg-gray-50 px-3.5 text-base font-medium text-gray-900 select-none hover:bg-gray-100 focus-visible:outline focus-visible:outline-2 focus-visible:-outline-offset-1 focus-visible:outline-blue-800 active:bg-gray-100">
               Cancel
             </AlertDialog.Close>
-            <AlertDialog.Close className="flex h-10 items-center justify-center rounded-md border border-gray-200 bg-gray-50 px-3.5 text-base font-medium text-red-800 select-none hover:bg-gray-100 focus-visible:outline-2 focus-visible:-outline-offset-1 focus-visible:outline-blue-800 active:bg-gray-100">
+            <AlertDialog.Close className="flex h-10 items-center justify-center rounded-md border border-gray-200 bg-gray-50 px-3.5 text-base font-medium text-red-800 select-none hover:bg-gray-100 focus-visible:outline focus-visible:outline-2 focus-visible:-outline-offset-1 focus-visible:outline-blue-800 active:bg-gray-100">
               Discard
             </AlertDialog.Close>
           </div>

docs/src/app/(public)/(content)/react/components/checkbox-group/demos/hero/tailwind/index.tsx

@@ -16,7 +16,7 @@ export default function ExampleCheckboxGroup() {
       <label className="flex items-center gap-2">
         <Checkbox.Root
           name="fuji-apple"
-          className="flex size-5 items-center justify-center rounded-sm outline-0 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-blue-800 data-[checked]:bg-gray-900 data-[unchecked]:border data-[unchecked]:border-gray-300"
+          className="flex size-5 items-center justify-center rounded-sm outline-none focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-blue-800 data-[checked]:bg-gray-900 data-[unchecked]:border data-[unchecked]:border-gray-300"
         >
           <Checkbox.Indicator className="flex text-gray-50 data-[unchecked]:hidden">
             <CheckIcon className="size-3" />
@@ -28,7 +28,7 @@ export default function ExampleCheckboxGroup() {
       <label className="flex items-center gap-2">
         <Checkbox.Root
           name="gala-apple"
-          className="flex size-5 items-center justify-center rounded-sm outline-0 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-blue-800 data-[checked]:bg-gray-900 data-[unchecked]:border data-[unchecked]:border-gray-300"
+          className="flex size-5 items-center justify-center rounded-sm outline-none focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-blue-800 data-[checked]:bg-gray-900 data-[unchecked]:border data-[unchecked]:border-gray-300"
         >
           <Checkbox.Indicator className="flex text-gray-50 data-[unchecked]:hidden">
             <CheckIcon className="size-3" />
@@ -40,7 +40,7 @@ export default function ExampleCheckboxGroup() {
       <label className="flex items-center gap-2">
         <Checkbox.Root
           name="granny-smith-apple"
-          className="flex size-5 items-center justify-center rounded-sm outline-0 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-blue-800 data-[checked]:bg-gray-900 data-[unchecked]:border data-[unchecked]:border-gray-300"
+          className="flex size-5 items-center justify-center rounded-sm outline-none focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-blue-800 data-[checked]:bg-gray-900 data-[unchecked]:border data-[unchecked]:border-gray-300"
         >
           <Checkbox.Indicator className="flex text-gray-50 data-[unchecked]:hidden">
             <CheckIcon className="size-3" />

docs/src/app/(public)/(content)/react/components/checkbox/demos/hero/tailwind/index.tsx

@@ -6,7 +6,7 @@ export default function ExampleCheckbox() {
     <label className="flex items-center gap-2 text-base text-gray-900">
       <Checkbox.Root
         defaultChecked
-        className="flex size-5 items-center justify-center rounded-sm outline-0 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-blue-800 data-[checked]:bg-gray-900 data-[unchecked]:border data-[unchecked]:border-gray-300"
+        className="flex size-5 items-center justify-center rounded-sm outline-none focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-blue-800 data-[checked]:bg-gray-900 data-[unchecked]:border data-[unchecked]:border-gray-300"
       >
         <Checkbox.Indicator className="flex text-gray-50 data-[unchecked]:hidden">
           <CheckIcon className="size-3" />

docs/src/app/(public)/(content)/react/components/collapsible/demos/hero/tailwind/index.tsx

@@ -4,11 +4,11 @@ import { Collapsible } from '@base-ui-components/react/collapsible';
 export default function ExampleCollapsible() {
   return (
     <Collapsible.Root className="flex min-h-36 w-56 flex-col justify-center text-gray-900">
-      <Collapsible.Trigger className="group flex items-center gap-2 rounded-sm bg-gray-100 px-2 py-1 text-sm font-medium hover:bg-gray-200 focus-visible:outline-2 focus-visible:outline-blue-800 active:bg-gray-200">
+      <Collapsible.Trigger className="group flex items-center gap-2 rounded-sm bg-gray-100 px-2 py-1 text-sm font-medium hover:bg-gray-200 focus-visible:outline focus-visible:outline-2 focus-visible:outline-blue-800 active:bg-gray-200">
         <ChevronIcon className="size-3 transition-all ease-out group-data-[panel-open]:rotate-90" />
         Recovery keys
       </Collapsible.Trigger>
-      <Collapsible.Panel className="flex h-[var(--collapsible-panel-height)] flex-col justify-end overflow-hidden text-sm transition-all ease-out [[data-starting-style],[data-ending-style]]:h-0">
+      <Collapsible.Panel className="flex h-[var(--collapsible-panel-height)] flex-col justify-end overflow-hidden text-sm transition-all ease-out data-[ending-style]:h-0 data-[starting-style]:h-0">
         <div className="mt-1 flex cursor-text flex-col gap-2 rounded-sm bg-gray-100 py-2 pl-7">
           <div>alien-bean-pasta</div>
           <div>wild-irish-burrito</div>

docs/src/app/(public)/(content)/react/components/dialog/demos/close-confirmation/css-modules/index.module.css

@@ -41,6 +41,7 @@
   font-size: 1rem;
   font-weight: 500;
   line-height: 1.5rem;
+  background-color: transparent;
   color: var(--color-red);
   border-radius: 0.25rem;
   padding: 0.125rem 0.375rem;