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-full text-sm font-medium transition-[color,background-color,border-color,box-shadow,transform] duration-200 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-clay/25 disabled:pointer-events-none disabled:opacity-45 [&_svg]:pointer-events-none [&_svg]:shrink-0',
  {
    variants: {
      variant: {
        default:
          'bg-ink text-paper shadow-[0_10px_30px_-18px_color-mix(in_oklab,var(--color-ink)_48%,transparent)] hover:-translate-y-0.5 hover:bg-ink/92',
        secondary:
          'bg-sand text-ink hover:bg-oat',
        outline:
          'border border-line bg-paper/90 text-ink hover:border-clay/40 hover:bg-paper',
        ghost:
          'text-muted hover:bg-sand hover:text-ink',
        destructive: 'bg-clay text-paper hover:bg-clay-strong',
      },
      size: {
        default: 'h-11 px-5',
        sm: 'h-9 px-4 text-sm',
        lg: 'h-12 px-6',
        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 };