bioai-platform/frontend/src/components/ui/Reveal.tsx

'use client';

import type { ReactNode } from 'react';
import { motion, useReducedMotion } from 'framer-motion';

/**
 * Entrance reveal for content below the fold. Fades + slides the child in the
 * first time it scrolls into view, then stays. Respects reduced motion.
 */
export function Reveal({
  children,
  delay = 0,
  y = 28,
  once = true,
  className = '',
}: {
  children: ReactNode;
  delay?: number;
  y?: number;
  once?: boolean;
  className?: string;
}) {
  const reduceMotion = useReducedMotion();

  return (
    <motion.div
      className={className}
      initial={reduceMotion ? { opacity: 0 } : { opacity: 0, y }}
      whileInView={reduceMotion ? { opacity: 1 } : { opacity: 1, y: 0 }}
      viewport={{ once, margin: '-60px' }}
      transition={{ duration: 0.5, delay, ease: [0.25, 1, 0.5, 1] }}
    >
      {children}
    </motion.div>
  );
}