<div class="container">
      </div>
      <div class="blob"></div>
    </div>
* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
	font-family: "Nunito", sans-serif;
}

body {
  background: #1f1f47
}

.container {

  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.card {
  width: 400px;
  min-height: 250px;
  background: rgba( 255, 255, 255, 0.15 );
  box-shadow: 0 8px 32px 0 rgba( 31, 38, 135, 0.37 );
  backdrop-filter: blur( 18px );
  -webkit-backdrop-filter: blur( 18px );
  border: 1px solid rgba( 255, 255, 255, 0.18 );
  border-radius: 1rem;
  padding: 1.5rem;
  z-index: 10;
  color: whitesmoke;
}

.title {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.subtitle {
  font-size: 1rem;
  margin-bottom: 2rem;
}

.btn {
  background: none;
  border: none;
  text-align: center;
  font-size: 1rem;
  color: whitesmoke;
  background-color: #fa709a;
  padding: 0.8rem 1.8rem;
  border-radius: 2rem;
  cursor: pointer;
}

.blob {
  position: absolute;
  width: 500px;
  height: 500px;
  background: linear-gradient(
    180deg,
    rgba(47, 184, 255,0.42) 31.77%,
    #5c9df1 100%
  );
  mix-blend-mode: color-dodge;
  -webkit-animation: move 25s infinite alternate;
          animation: move 25s infinite alternate;
  transition: 1s cubic-bezier(0.07, 0.8, 0.16, 1);
}

.blob:hover {
  width: 520px;
  height: 520px;
  -webkit-filter: blur(30px);
          filter: blur(30px);
  box-shadow:
    inset 0 0 0 5px rgba(255,255,255, 0.6),
    inset 100px 100px 0 0px #fa709a,
    inset 200px 200px 0 0px #784ba8,
    inset 300px 300px 0 0px #2b86c5;
}

@-webkit-keyframes move {
  from {
    transform: translate(-100px, -50px) rotate(-90deg);
    border-radius: 24% 76% 35% 65% / 27% 36% 64% 73%;
  }

  to {
    transform: translate(500px, 100px) rotate(-10deg);
    border-radius: 76% 24% 33% 67% / 68% 55% 45% 32%;
  }
}

@keyframes move {
  from {
    transform: translate(-100px, -50px) rotate(-90deg);
    border-radius: 24% 76% 35% 65% / 27% 36% 64% 73%;
  }

  to {
    transform: translate(500px, 100px) rotate(-10deg);
    border-radius: 76% 24% 33% 67% / 68% 55% 45% 32%;
  }
}

External CSS

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External JavaScript

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