html, body {
  height: 100%;
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #ffffff;
  color: #222222;
  user-select: none;
}

.modal-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(255, 255, 255, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  padding: 20px;
  box-sizing: border-box;
}

.modal-content {
  background-color: #ffffff;
  border-radius: 1rem;
  max-width: 480px;
  width: 100%;
  padding: 2rem 2.5rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  text-align: center;
  color: #111111;
}

.modal-content h2 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.modal-content p {
  font-size: 1.1rem;
  line-height: 1.5;
  margin-bottom: 2rem;
}

.modal-content button {
  background-color: #001f3f;
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 2.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.modal-content button:hover {
  background-color: #003366;
}

@media (max-width: 576px) {
  .modal-content {
    padding: 1.5rem 1.5rem;
  }
  .modal-content h2 {
    font-size: 1.4rem;
  }
  .modal-content p {
    font-size: 1rem;
  }
  .modal-content button {
    font-size: 1rem;
    padding: 0.6rem 2rem;
  }
}