.wall-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  z-index: 9999;
}

.wall-modal-content {
  background: #fff;
  width: 90%;
  max-width: 600px;
  margin: 5% auto;
  padding: 20px;
}

.wall-canvas-wrapper {
  margin-top: 15px;
  border: 1px solid #ddd;
}