styles.css

body,
html {
  margin: 0;
  height: 100%;
  background-color: transparent;
  overflow: hidden;
  cursor: crosshair;
}

* {
  user-select: none;
}

.cropper {
  position: absolute;
  border: 2px solid white;
  box-shadow: 0px 0px 100px 10px rgba(255, 255, 255, 0.3);
}

.cropper.active {
  outline: 10000px solid rgba(0, 0, 0, 0.55);
}

@keyframes darken {
  0% {
    background-color: rgba(0, 0, 0, 0);
  }
  100% {
    background-color: rgba(0, 0, 0, 0.55);
  }
}

.overlay {
  animation: forwards 0.5s darken;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.overlay.active {
  animation: none;
  background-color: transparent !important;
}

.glass {
  position: absolute;
  outline: 2px solid white;
  border-radius: 5000px;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.card {
  --margin: 10px;
  position: absolute;
  top: var(--margin);
  left: var(--margin);
  width: calc(100% - var(--margin) * 2);
  height: calc(100% - var(--margin) * 2);

  background-color: #fff;
  border-radius: 10px;
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.2);

  color: transparent;

  transition: 0.2s ease-in-out;
  font-family: sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
}

.tooltip {
  color: white;
  position: absolute;
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 130px;
  height: 60px;
}

.card:hover {
  transform: scale(1.05);
  color: white;
}

.card > span {
  mix-blend-mode: difference;
}

.drag-bar {
  position: absolute;
  width: calc(100% - 30px);
  height: 40px;
  top: 0;
  left: 0;
  -webkit-app-region: drag;
}

.close-card {
  position: absolute;
  top: 0;
  right: 0;
  transform: scale(0.5);
  fill: red;
  border-radius: 0 0 0 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transition: 0.2s ease-in-out;
}

body:hover .close-card {
  opacity: 1;
}