Temporizador de Cuenta Regresiva

.countdown-container {
  text-align: center;
  font-size: 2em;
}

document.addEventListener('DOMContentLoaded', () => {
  const countdownElement = document.getElementById('countdown');
  const countDownDate = new Date("Jan 1, 2026 00:00:00").getTime();

  const x = setInterval(() => {
    const now = new Date().getTime();
    const distance = countDownDate - now;

    const days = Math.floor(distance / (1000 * 60 * 60 * 24));
    const hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
    const minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
    const seconds = Math.floor((distance % (1000 * 60)) / 1000);

    countdownElement.innerHTML = days + "d " + hours + "h " + minutes + "m " + seconds + "s ";

    if (distance < 0) {
      clearInterval(x);
      countdownElement.innerHTML = "EXPIRADO";
    }
  }, 1000);
});