.warp {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hover-tip {
  text-align: center;
  font-weight: bold;
}

.card {
  --ballSize: 80px;
  --gap: 16px;
  --duration: 4s;
  width: 200px;
  height: 300px;
  gap: var(--gap);
  filter: contrast(20);
  background-color: #222;
  position: relative;
  overflow: hidden;
  border: 1px solid #333;
  border-radius: 8px;
}
.content {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  opacity: 0;
  transition: all 0.3s 0.3s;
}
.mask-wrap {
  --color: #fff;
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
  transform: scale(1.1);
  display: flex;
  pointer-events: none;
  .mask {
    width: 100%;
    height: 100%;
    background: var(--color);
    filter: blur(18px);
    transition: all 0.5s 0.3s;
  }
}
.loading-wrap {
  --color: #000;
  width: 60px;
  height: 60px;
  margin: -30px 0 0 -30px;
  position: absolute;
  inset: 50%;
  pointer-events: none;
  transition: all 0.3s 0.3s;
}
.ball {
  filter: blur(4px);
  &.ball1 {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 6px solid var(--color);
    animation: animBall1 3s steps(4) infinite;
  }
  &.ball2 {
    width: 12px;
    height: 12px;
    margin: -6px 0 0 -6px;
    position: absolute;
    inset: 50%;
    border-radius: 50%;
    border: 6px solid var(--color);
    animation: animBall2 3s ease-in-out infinite;
  }
}
@keyframes animBall1 {
  100% {
    transform: rotate(360deg);
  }
}
@keyframes animBall2 {
  50% {
    transform: translateY(18px);
  }
}

.card:hover {
  .content {
    opacity: 1;
  }
  .mask-left {
    transform: translateX(-100%);
  }
  .mask-right {
    transform: translateX(100%);
  }
  .loading-wrap {
    opacity: 0;
  }
}