function openReservationForm() {
  const now = new Date();
  const minDate = new Date();
  minDate.setDate(now.getDate() + 3); // Exclude today and the next 2 days
  const formattedMinDate = minDate.toISOString().split('T')[0];
  document.getElementById('datum_konce').setAttribute('min', formattedMinDate);
  document.getElementById('reservationForm').style.display = 'block';
}

function closeReservationForm() {
  document.getElementById('reservationForm').style.display = 'none';
}