"use client";

import { useEffect, useState } from "react";

export default function ReadingProgress() {
  const [progress, setProgress] = useState(0);

  useEffect(() => {
    const handleScroll = () => {
      const scrollable = document.body.scrollHeight - window.innerHeight;
      if (scrollable > 0) {
        setProgress((window.scrollY / scrollable) * 100);
      }
    };

    window.addEventListener("scroll", handleScroll, { passive: true });
    return () => window.removeEventListener("scroll", handleScroll);
  }, []);

  return (
    <div className="h-[3px] w-full bg-black/20">
      <div
        className="h-full transition-[width] duration-100"
        style={{
          width: `${progress}%`,
          background:
            "linear-gradient(90deg, rgba(255,255,255,0.9) 0%, rgba(180,230,255,0.75) 100%)",
        }}
      />
    </div>
  );
}
