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%;
  max-width: 100%;

  opacity: 0;
  transform: translateY(10px);
  animation: Modal__content_fade-in 0.1s ease-out 0.05s forwards;
  position: relative;
}

@keyframes Modal__content_fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.Modal__close {
  position: absolute;
  right: calc(var(--space-factor) * 5);
  top: calc(var(--space-factor) * 5);
}