portfolio/app/not-found.tsx

"use client";

import { ArrowLeft, Search } from "lucide-react";
import Link from "next/link";
import { useRouter } from "next/navigation";
import { useEffect, useState } from "react";
import { useLocale, useTranslations } from "next-intl";

export default function NotFound() {
  const [mounted, setMounted] = useState(false);
  const router = useRouter();
  const locale = useLocale();
  const t = useTranslations("notFound");

  useEffect(() => {
    setMounted(true);
  }, []);

  if (!mounted) return null;

  return (
    <main className="min-h-screen bg-stone-50 dark:bg-stone-950 py-16 sm:py-20 md:py-24 px-4 sm:px-6 flex items-center justify-center transition-colors duration-500">
      <div className="max-w-7xl mx-auto w-full">
        <div className="grid grid-cols-1 md:grid-cols-12 gap-4 sm:gap-6 md:gap-8 max-w-5xl mx-auto">

          <div className="md:col-span-12 bg-white dark:bg-stone-900 rounded-2xl sm:rounded-[2.5rem] md:rounded-[3rem] p-6 sm:p-8 md:p-16 border border-stone-200/60 dark:border-stone-800/60 shadow-sm flex flex-col justify-between min-h-[300px] sm:min-h-[400px]">
            <div>
              <div className="flex items-center gap-3 mb-6 sm:mb-8 md:mb-12">
                <div className="w-10 h-10 rounded-2xl bg-stone-900 dark:bg-stone-50 flex items-center justify-center text-white dark:text-stone-900 font-black text-xs">
                  404
                </div>
                <span className="text-[10px] font-black uppercase tracking-[0.3em] text-stone-400">{t("errorReport")}</span>
              </div>
              <h1 className="text-4xl sm:text-5xl md:text-8xl font-black tracking-tighter uppercase text-stone-900 dark:text-stone-50 leading-[0.85] mb-4 sm:mb-6 md:mb-8">
                {t("title").split(" ").map((word, i) => (
                  <span key={i}>{i > 0 ? " " : ""}{word}{i === 0 ? "" : ""}{i === t("title").split(" ").length - 1 ? <span className="text-emerald-600 dark:text-emerald-400">.</span> : ""}</span>
                ))}
              </h1>
              <p className="text-base sm:text-lg md:text-xl lg:text-2xl font-light text-stone-500 dark:text-stone-400 max-w-md leading-relaxed">
                {t("description")}
              </p>
            </div>

            <div className="mt-8 sm:mt-10 md:mt-12 flex flex-wrap gap-3 sm:gap-4">
              <Link
                href={`/${locale}`}
                className="group relative px-6 sm:px-10 py-3 sm:py-4 bg-stone-900 dark:bg-stone-50 text-white dark:text-stone-900 rounded-xl sm:rounded-2xl font-black text-xs uppercase tracking-[0.2em] shadow-xl hover:scale-105 transition-all"
              >
                {t("returnHome")}
              </Link>
              <button
                onClick={() => router.back()}
                className="px-6 sm:px-10 py-3 sm:py-4 bg-white dark:bg-stone-800 text-stone-900 dark:text-stone-100 border border-stone-200 dark:border-stone-700 rounded-xl sm:rounded-2xl font-black text-xs uppercase tracking-[0.2em] hover:bg-stone-50 dark:hover:bg-stone-700 transition-all"
              >
                {t("goBack")}
              </button>
            </div>
          </div>

          <div className="md:col-span-12 bg-stone-900 rounded-2xl sm:rounded-[2.5rem] p-6 sm:p-8 md:p-10 border border-stone-800 shadow-2xl text-white relative overflow-hidden group flex flex-col justify-between min-h-[200px]">
            <div className="relative z-10">
              <Search className="text-liquid-mint mb-4 sm:mb-6" size={28} />
              <h3 className="text-xl sm:text-2xl font-black uppercase tracking-tighter mb-1 sm:mb-2">{t("exploreWork")}</h3>
              <p className="text-stone-400 text-sm font-medium">{t("exploreWorkDesc")}</p>
            </div>
            <Link
              href={`/${locale}/projects`}
              className="mt-5 sm:mt-8 inline-flex items-center gap-2 text-[10px] font-black uppercase tracking-widest text-liquid-mint group-hover:gap-4 transition-all"
            >
              {t("viewProjects")} <ArrowLeft className="rotate-180" size={14} />
            </Link>
            <div className="absolute top-0 right-0 w-32 h-32 bg-liquid-mint/5 blur-3xl rounded-full -mr-16 -mt-16" />
          </div>

        </div>
      </div>
    </main>
  );
}