since3-portal/components/ui/button.tsx

import { Button as ButtonPrimitive } from "@base-ui/react/button"
import { cva, type VariantProps } from "class-variance-authority"
import { cn } from "cn"

const buttonVariants = cva(
  "group/button inline-flex shrink-0 items-center justify-center gap-2 rounded-md border border-transparent bg-clip-padding text-sm font-medium whitespace-nowrap transition-[background-color,border-color,color] duration-[var(--duration-fast)] ease-out outline-none select-none focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:pointer-events-none disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
  {
    variants: {
      variant: {
        primary: "bg-primary text-primary-foreground hover:bg-accent-600",
        secondary:
          "bg-secondary text-secondary-foreground border-border hover:bg-ink-100 dark:hover:bg-ink-800",
        outline:
          "border-border bg-background hover:bg-surface aria-expanded:bg-surface",
        ghost: "hover:bg-surface aria-expanded:bg-surface",
        destructive: "bg-destructive text-white hover:opacity-90",
        link: "text-primary underline-offset-4 hover:underline",
      },
      size: {
        sm: "h-8 gap-1.5 px-2.5 text-[0.8rem] has-data-[icon=inline-end]:pr-2 has-data-[icon=inline-start]:pl-2",
        md: "h-10 gap-1.5 px-3 has-data-[icon=inline-end]:pr-2.5 has-data-[icon=inline-start]:pl-2.5",
        lg: "h-12 gap-2 px-4 text-base has-data-[icon=inline-end]:pr-3 has-data-[icon=inline-start]:pl-3",
        icon: "size-10",
      },
    },
    defaultVariants: {
      variant: "primary",
      size: "md",
    },
  }
)

function Button({
  className,
  variant = "primary",
  size = "md",
  ...props
}: ButtonPrimitive.Props & VariantProps<typeof buttonVariants>) {
  return (
    <ButtonPrimitive
      data-slot="button"
      className={cn(buttonVariants({ variant, size, className }))}
      {...props}
    />
  )
}

export { Button, buttonVariants }