excalidraw/src/components/Modal.css

.Modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  padding: calc(var(--space-factor) * 10);
}

.Modal__background {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  background-color: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(2px);
}

.Modal__content {
  position: relative;
  z-index: 2;
  width: 100%;
}