Design skill

<div className="rounded-xl" />
<div className="rounded-[calc(var(--radius)*0.75)]" />
<div className="rounded-[min(calc(var(--radius)*2.8),var(--radius-max))]" />

<div className="rounded-[10px]" />
<div style={{ borderRadius: 6 }} />
<div className="rounded-[calc(var(--radius)*2.8)]" />  // passes the cap

<Button variant="outline" size="sm">Export</Button>
<Button className="w-full">Continue</Button>   // layout only

<Button className="h-10 rounded-full px-6 font-bold shadow-lg">
  Export
</Button>

<MenuContent>
  <MenuGroup>
    <MenuLabel>Agent</MenuLabel>
    <MenuItem>Code reviewer</MenuItem>
    <MenuItem>Release notes</MenuItem>
  </MenuGroup>
</MenuContent>

<MenuContent>
  <MenuLabel>Agent</MenuLabel>
  <MenuItem>Code reviewer</MenuItem>
  <MenuItem>Release notes</MenuItem>
</MenuContent>

<div className="transition-[box-shadow,background-color] duration-150 ease-out hover:bg-secondary" />
<Panel className="transition-[opacity,translate] duration-300" />

<div className="transition-all duration-500 hover:bg-secondary" />

const reduce = useReducedMotion()
<motion.div
  initial={reduce ? { opacity: 0 } : { opacity: 0, y: 12, filter: "blur(4px)" }}
  animate={{ opacity: 1, y: 0, filter: "blur(0px)" }}
/>

<motion.div initial={{ opacity: 0, y: 40, scale: 0.8 }} animate={{ opacity: 1, y: 0, scale: 1 }} />

components/blog/parts/author-avatar.tsx
components/vscode/parts/buffers.ts

components/blog/parts/avatar.tsx     # same name as @paneui/avatar
components/vscode/parts/docs.ts       # same name as @paneui/docs

npx shadcn@latest add @paneui/theme --overwrite
npx shadcn@latest add @paneui/upgrade-check
node scripts/paneui-upgrade-check.mjs --fix

npx shadcn@latest add @paneui/theme --overwrite
# removed tokens stay in globals.css

// A 16px close button keeps its look and reaches 24px through a pseudo-element.
import { XIcon } from "@/components/icons"

export function ChipClose({ onClose }: { onClose: () => void }) {
  return (
    <button
      type="button"
      aria-label="Remove"
      onClick={onClose}
      className="relative grid size-4 place-items-center rounded-sm text-muted-foreground after:absolute after:-inset-1 hover:text-foreground pointer-coarse:after:-inset-3.5"
    >
      <XIcon className="size-3" />
    </button>
  )
}

// 16px is all there is to hit; on a trackpad it takes two tries.
import { XIcon } from "@/components/icons"

export function ChipClose({ onClose }: { onClose: () => void }) {
  return (
    <button type="button" aria-label="Remove" onClick={onClose} className="grid size-4 place-items-center rounded-sm text-muted-foreground hover:text-foreground">
      <XIcon className="size-3" />
    </button>
  )
}

import { Button } from "@/components/ui/button"
import { PlusIcon } from "@/components/icons"

// data-icon trims 2px on the icon side, so the content looks centred.
export function NewButton() {
  return (
    <Button>
      <PlusIcon data-icon="inline-start" />
      New project
    </Button>
  )
}

import { Button } from "@/components/ui/button"
import { PlusIcon } from "@/components/icons"

// Equal padding: the icon's side bearing makes the start look wider than the end.
export function NewButton() {
  return (
    <Button>
      <PlusIcon />
      New project
    </Button>
  )
}

// A neutral inset hairline keeps a light photo's edge on a white card.
export function Cover({ src, alt }: { src: string; alt: string }) {
  return <img src={src} alt={alt} className="aspect-video w-full rounded-lg object-cover media-outline" />
}

// No edge: a pale image melts into the surface behind it.
export function Cover({ src, alt }: { src: string; alt: string }) {
  return <img src={src} alt={alt} className="aspect-video w-full rounded-lg object-cover" />
}

import { AnimatePresence, motion } from "motion/react"

import { CheckIcon, CopyIcon } from "@/components/icons"
import { Button } from "@/components/ui/button"

// The glyph changes in place: scale 0.25, blur 4px and opacity 0 on the way in and out.
// With the action-swap-blur item installed, <ActionSwapBlurIcon value={…}> does the same.
const hidden = { opacity: 0, scale: 0.25, filter: "blur(4px)" }

export function CopyButton({ copied, onCopy }: { copied: boolean; onCopy: () => void }) {
  return (
    <Button variant="ghost" size="icon-sm" aria-label={copied ? "Copied" : "Copy"} onClick={onCopy}>
      <AnimatePresence initial={false} mode="popLayout">
        <motion.span
          key={copied ? "copied" : "copy"}
          initial={hidden}
          animate={{ opacity: 1, scale: 1, filter: "blur(0px)" }}
          exit={hidden}
          transition={{ type: "spring", duration: 0.3, bounce: 0 }}
          className="inline-flex"
        >
          {copied ? <CheckIcon /> : <CopyIcon />}
        </motion.span>
      </AnimatePresence>
    </Button>
  )
}

import { Button } from "@/components/ui/button"
import { CheckIcon, CopyIcon } from "@/components/icons"

// The glyph cuts from copy to check, so the change is easy to miss.
export function CopyButton({ copied, onCopy }: { copied: boolean; onCopy: () => void }) {
  return (
    <Button variant="ghost" size="icon-sm" aria-label={copied ? "Copied" : "Copy"} onClick={onCopy}>
      {copied ? <CheckIcon /> : <CopyIcon />}
    </Button>
  )
}

// Open and closed are two states of one transition, so a quick toggle reverses smoothly.
export function Reveal({ open, children }: { open: boolean; children: React.ReactNode }) {
  return (
    <div data-open={open || undefined} className="opacity-0 transition-[opacity,translate] duration-200 ease-[cubic-bezier(0.22,1,0.36,1)] data-open:translate-y-0 data-open:opacity-100 motion-safe:translate-y-1">
      {children}
    </div>
  )
}

// A keyframe restarts from frame one when the state flips mid-way, so a quick toggle snaps.
export function Reveal({ open, children }: { open: boolean; children: React.ReactNode }) {
  return (
    <div data-open={open || undefined} className="opacity-0 data-open:animate-[fade-up_200ms_ease-out_forwards]">
      {children}
    </div>
  )
}

import { motion } from "motion/react"

// The toast leaves with a short rise and a fade, faster than it came in.
export function Toast({ children }: { children: React.ReactNode }) {
  return (
    <motion.div
      initial={{ opacity: 0, y: 12, filter: "blur(4px)" }}
      animate={{ opacity: 1, y: 0, filter: "blur(0px)" }}
      exit={{ opacity: 0, y: -12, filter: "blur(4px)", transition: { duration: 0.15 } }}
      className="rounded-xl bg-popover p-3 shadow-surface"
    >
      {children}
    </motion.div>
  )
}

import { motion } from "motion/react"

// Shrinking to half size and flying a full height pulls the eye back to something that is leaving.
export function Toast({ children }: { children: React.ReactNode }) {
  return (
    <motion.div initial={{ opacity: 0 }} animate={{ opacity: 1 }} exit={{ opacity: 0, y: "-100%", scale: 0.5 }} className="rounded-xl bg-popover p-3 shadow-surface">
      {children}
    </motion.div>
  )
}

// One SVG painted with currentColor; hover and selected states are text colours.
export function Dot() {
  return (
    <svg viewBox="0 0 16 16" className="size-4 text-muted-foreground hover:text-foreground aria-selected:text-primary">
      <circle cx="8" cy="8" r="4" fill="currentColor" />
    </svg>
  )
}

// A baked-in colour can't follow hover, selection, dark mode or the accent.
export function Dot() {
  return (
    <svg viewBox="0 0 16 16" className="size-4">
      <circle cx="8" cy="8" r="4" fill="#0090ff" />
    </svg>
  )
}

import { Button } from "@/components/ui/button"
import { TrashIcon } from "@/components/icons"

// The name a screen reader announces, and the text its tooltip shows.
export function DeleteButton({ onDelete }: { onDelete: () => void }) {
  return (
    <Button variant="ghost" size="icon-sm" aria-label="Delete" onClick={onDelete}>
      <TrashIcon />
    </Button>
  )
}

import { Button } from "@/components/ui/button"
import { TrashIcon } from "@/components/icons"

// Announced as "button" and nothing else.
export function DeleteButton({ onDelete }: { onDelete: () => void }) {
  return (
    <Button variant="ghost" size="icon-sm" onClick={onDelete}>
      <TrashIcon />
    </Button>
  )
}

import { SparklesIcon } from "@/components/icons"

// icon-bold puts every line icon inside on the bold stroke tier, matching the semibold type.
export function SectionTitle() {
  return (
    <h3 className="flex items-center gap-2 text-ui-lg font-semibold text-balance icon-bold">
      <SparklesIcon className="size-4" />
      Highlights
    </h3>
  )
}

import { SparklesIcon } from "@/components/icons"

// A regular stroke beside semibold text looks faint next to the type.
export function SectionTitle() {
  return (
    <h3 className="flex items-center gap-2 text-ui-lg font-semibold text-balance">
      <SparklesIcon className="size-4" />
      Highlights
    </h3>
  )
}

import { HomeFilledIcon, HomeIcon, InboxFilledIcon, InboxIcon } from "@/components/icons"
import { TabBar, TabBarItem } from "@/components/ui/tab-bar"

// Outline at rest, the filled glyph when active: the shape changes as well as the colour.
export function AppTabs({ tab }: { tab: string }) {
  return (
    <TabBar aria-label="App">
      <TabBarItem icon={<HomeIcon />} activeIcon={<HomeFilledIcon />} label="Home" active={tab === "home"} />
      <TabBarItem icon={<InboxIcon />} activeIcon={<InboxFilledIcon />} label="Inbox" active={tab === "inbox"} />
    </TabBar>
  )
}

import { HomeIcon, InboxIcon } from "@/components/icons"
import { TabBar, TabBarItem } from "@/components/ui/tab-bar"

// With no row fill, colour alone has to carry the active state.
export function AppTabs({ tab }: { tab: string }) {
  return (
    <TabBar aria-label="App">
      <TabBarItem icon={<HomeIcon />} label="Home" active={tab === "home"} />
      <TabBarItem icon={<InboxIcon />} label="Inbox" active={tab === "inbox"} />
    </TabBar>
  )
}

// text-end follows the reading direction: right in English, left in right-to-left.
export function Total({ value }: { value: string }) {
  return <span className="w-24 text-end tabular-nums">{value}</span>
}

// text-right stays on the right in Arabic or Hebrew, where the number should sit at the start.
export function Total({ value }: { value: string }) {
  return <span className="w-24 text-right tabular-nums">{value}</span>
}