frontend/src/components/AnimatedSection.js

import React, { useRef, useState, useEffect } from 'react';

export const AnimatedSection = ({ children, className = '', delay = 0 }) => {
  const ref = useRef(null);
  const [isVisible, setIsVisible] = useState(false);

  useEffect(() => {
    const observer = new IntersectionObserver(
      ([entry]) => {
        if (entry.isIntersecting) {
          setIsVisible(true);
          observer.disconnect();
        }
      },
      { threshold: 0.1, rootMargin: '0px 0px -40px 0px' }
    );
    if (ref.current) observer.observe(ref.current);
    return () => observer.disconnect();
  }, []);

  return (
    <div
      ref={ref}
      className={className}
      style={{
        opacity: isVisible ? 1 : 0,
        transform: isVisible ? 'translateY(0)' : 'translateY(20px)',
        transition: `opacity 0.6s ease-out ${delay}ms, transform 0.6s ease-out ${delay}ms`,
      }}
    >
      {children}
    </div>
  );
};