body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  row-gap: 1em;
  background-image: radial-gradient(circle, #fff 60%, #cfcecb);
  font-family: sans-serif;
}

.scratch-card {
  position: relative;
  border: 4px solid #c7c6cf;
  border-radius: 8px;
  padding: 12px;
  width: 320px;
  height: 320px;
  background-color: #fff;
}

.scratch-card-cover-container {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  border-radius: 4px;
  width: 100%;
  height: 100%;
  filter: url("#remove-black");
  transition: opacity 0.4s;

  &.clear {
    opacity: 0;
  }

  &.hidden {
    display: none;
  }
}

.scratch-card-canvas {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;

  &.hidden {
    opacity: 0;
  }

  &:active {
    cursor: grabbing;
  }
}

.scratch-card-canvas-render {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: transparent;
  transition: background-color 0.2s;

  &.hidden {
    display: none;
  }
}

.scratch-card-cover {
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #cfced6;
  background-image: linear-gradient(
    to right,
    #cfced6,
    #e0dfe6,
    #efeef3,
    #e0dfe6,
    #cfced6
  );
  overflow: hidden;

  &::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(
      135deg,
      transparent 40%,
      rgb(255 255 255 / 0.8) 50%,
      transparent 60%
    );
    background-position: bottom right;
    background-size: 300% 300%;
    background-repeat: no-repeat;

    @at-root .scratch-card-cover.shine::before {
      animation: shine 8s infinite;
    }
  }

  @keyframes shine {
    50% {
      background-position: 0% 0%;
    }
    100% {
      background-position: -50% -50%;
    }
  }

  &::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    filter: url("#noise");
  }
}

.scratch-card-cover-background {
  width: 100%;
  height: 100%;
  fill: #555;
  opacity: 0.1;
}

.scratch-card-image {
  border-radius: 4px;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 4px 4px rgb(0 0 0 / 0.16));
  user-select: none;
  will-change: transform;

  &.animate {
    animation: pop-out-in cubic-bezier(0.65, 1.35, 0.5, 1) 1s;
  }
}

@keyframes pop-out-in {
  36% {
    transform: scale(1.125);
  }
  100% {
    transform: scale(1);
  }
}