blackheart-website/src/components/ui/Reveal.tsx

"use client";

import { useEffect, useRef, useState } from "react";

interface RevealProps {
  children: React.ReactNode;
  className?: string;
}

export function Reveal({ children, className = "" }: RevealProps) {
  const ref = useRef<HTMLDivElement>(null);
  const [visible, setVisible] = useState(false);

  useEffect(() => {
    const el = ref.current;
    if (!el) return;

    const observer = new IntersectionObserver(
      ([entry]) => {
        if (entry.isIntersecting) {
          setVisible(true);
          observer.unobserve(el);
        }
      },
      { threshold: 0.1, rootMargin: "0px 0px -50px 0px" },
    );

    observer.observe(el);
    return () => observer.disconnect();
  }, []);

  return (
    <div
      ref={ref}
      className={className}
      style={{
        opacity: visible ? 1 : 0,
        transform: visible ? "translateY(0)" : "translateY(30px)",
        transition: "opacity 0.7s ease-out, transform 0.7s ease-out",
      }}
    >
      {children}
    </div>
  );
}