.modal {
  position: fixed;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;

  background: rgba(20, 60, 120, 0.15); /* light blue haze */
  backdrop-filter: blur(10px);
  z-index: 1000;
}

.modal.hidden {
  display: none;
}

.modal-content.light {
  background: linear-gradient(180deg, #ffffff, #f4f9ff);
  border-radius: 16px;
  padding: 2rem;
  width: 420px;

  box-shadow:
    0 20px 60px rgba(0,0,0,0.12),
    0 0 40px rgba(42,91,215,0.15);
}

.door-btn {
  background: linear-gradient(135deg, #2a5bd7, #00cc99);
  color: #fff;
  padding: 0.8rem 1.6rem;
  border-radius: 30px;
  border: none;
  cursor: pointer;
}

/* INTERIOR */
.interior {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}

.interior.hidden {
  display: none;
}

.interior-main {
  flex: 2;
}

.interior-sidebar {
  flex: 1;
  background: #f4f9ff;
  padding: 1rem;
  border-radius: 12px;
}