[data-md-color-scheme="dracula"] img[src$="#only-light"] {
  display: none;
}
[data-md-color-scheme="dracula"] img[src$="#only-dark"] {
  display: inline;
}
[data-md-color-scheme="default"] img[src$="#only-dark"] {
  display: none;
}
[data-md-color-scheme="default"] img[src$="#only-light"] {
  display: inline;
}

@keyframes heart {
  0%, 40%, 80%, 100% {
    transform: scale(1);
  }
  20%, 60% {
    transform: scale(1.15);
  }
}
.heart {
  animation: heart 1500ms infinite;
}