<div class="gradient"></div>

@keyframes rotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.gradient {
  --size: 750px;
  --speed: 50s;
  --easing: cubic-bezier(0.8, 0.2, 0.2, 0.8);

  width: var(--size);
  height: var(--size);
  filter: blur(calc(var(--size) / 5));
  background-image: linear-gradient(hsl(222, 84, 60, 100%), hsl(164, 79, 71));
  animation: rotate var(--speed) var(--easing) alternate infinite;
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
}

@media (min-width: 720px) {
  .gradient {
    --size: 500px;
  }
}

body {
  background-color: #071c39;
  position: absolute;
  inset: 0;
  display: flex;
  place-content: center;
  align-items: center;
  overflow: hidden;
}

/* This is just to transition when you change the viewport size. */
* {
  transition: all 0.5s ease-out;
}

// @todo Add an SVG grain texture to smooth out the gradient steps.