#app {
  position: relative;
}

.graphic-container {
  position: relative;
  margin: 0px auto;
}
.graphic-container canvas, .graphic-container svg {
  position: absolute;
  top: 0;
  left: 0;
}

.card {
  position: absolute;
  top: 20px;
  left: calc(50% - 200px);
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  padding: 20px;
  color: rgba(255, 255, 255, 0.87);
  background-color: rgba(40, 40, 40, 0.87);
  box-shadow: 0 2px 2px rgba(0, 0, 0, 0.24), 0 2px 4px rgba(0, 0, 0, 0.12);
}