btrc-hub/frontend/src/components/ui/button.tsx

import * as React from "react"
import { Slot } from "@radix-ui/react-slot"
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-2 focus-visible:ring-slate-400',
    'disabled:pointer-events-none disabled:opacity-50',
    '[&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0',
  ].join (' '),
  {
    variants: {
      variant: {
        default:
          'bg-slate-900 text-white hover:bg-slate-700 dark:bg-slate-100 dark:text-slate-900 dark:hover:bg-slate-300',

        destructive:
          'bg-red-600 text-white hover:bg-red-700 dark:bg-red-700 dark:hover:bg-red-600',

        outline:
          'border border-slate-300 bg-white text-slate-900 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-100 dark:hover:bg-slate-800',

        secondary:
          'bg-slate-100 text-slate-900 hover:bg-slate-200 dark:bg-slate-800 dark:text-slate-100 dark:hover:bg-slate-700',

        ghost:
          'text-slate-900 hover:bg-slate-100 dark:text-slate-100 dark:hover:bg-slate-800',

        link:
          'text-blue-700 underline-offset-4 hover:underline dark:text-blue-300',
      },
      size: {
        default: 'h-10 px-4 py-2',
        sm:      'h-9 rounded-md px-3',
        lg:      'h-11 rounded-md px-8',
        icon:    'h-10 w-10',
      },
    },
    defaultVariants: {
      variant: 'default',
      size:    'default',
    },
  })

export interface ButtonProps
  extends React.ButtonHTMLAttributes<HTMLButtonElement>,
    VariantProps<typeof buttonVariants> {
  asChild?: boolean
}

const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
  ({ className, variant, size, asChild = false, ...props }, ref) => {
    const Comp = asChild ? Slot : "button"
    return (
      <Comp
        className={cn(buttonVariants({ variant, size, className }))}
        ref={ref}
        {...props}
      />
    )
  }
)
Button.displayName = "Button"

export { Button, buttonVariants }