body, html {
  width: 100vw;
  height: 100vh;
  font-family: "Montserrat", sans-serif;
}

svg {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

circle {
  animation: move var(--duration) ease-in-out infinite;
}

.banner {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -webkit-backdrop-filter: blur(100px);
          backdrop-filter: blur(100px);
  padding: 2rem;
  border-radius: 1rem;
  background-color: rgba(255, 255, 255, 0.2);
  border: 0.5rem solid rgba(255, 255, 255, 0.1);
  width: 30rem;
  max-width: 70vw;
}
.banner h1 {
  text-align: center;
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 2rem;
}
.banner p {
  margin-bottom: 2rem;
  line-height: 1.3em;
  text-align: center;
}
.banner button {
  border: none;
  box-shadow: inset 0 0 0 0.3rem rgba(255, 255, 255, 0.2);
  font-size: 1.2rem;
  padding: 1rem 1.5rem;
  border-radius: 0.2rem;
  cursor: pointer;
  background-image: linear-gradient(-45deg, hsl(calc(var(--hue) + 50), 60%, 60%), hsl(var(--hue), 80%, 80%));
}

@keyframes move {
  0%, 100% {
    cx: var(--from-x);
    cy: var(--from-y);
  }
  50% {
    cx: var(--to-x);
    cy: var(--to-y);
  }
}