index.css

body {
  display: grid;
  place-items: center;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 1rem;
  gap: 3rem;
  max-width: 60ch;
}

main > img {
  max-width: 10rem;
}

h1, h2, h3, p {
  text-align: center;
  margin: 0;
}

#get-location {
  --side-arrow-scale: 3;
  --side-arrow-size: calc(var(--side-arrow-scale) * 1rem);

  display: flex;
  width: 9rem;
  background-color: transparent;
  aspect-ratio: 1/1;
  border-radius: 50%;
  box-shadow: 20px 20px 60px #bebebe, -20px -20px 60px #ffffff;
  border: none;
  position: relative;
  cursor: pointer;
  gap: 1rem;

}

#get-location img {
  width: 100%;
  margin: auto;
}

#get-location::before, #get-location::after {
  position: absolute;
  top: calc((6 - var(--side-arrow-scale)) / 3 * 25%);
  font-size: var(--side-arrow-size);
  animation-duration: 1s;
  animation-timing-function: ease;
  animation-direction: alternate;
  animation-iteration-count: infinite;
  filter: blur(1px);
}

#get-location::before {
  content: ">";
  left: calc(-1 * var(--side-arrow-size));
  animation-name: bounce-left;
}

#get-location::after {
  content: "<";
  right: calc(-1 * var(--side-arrow-size));;
  animation-name: bounce-right;
}

@keyframes bounce-left {

  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(calc(-1 * var(--side-arrow-size)));
  }
}

@keyframes bounce-right {

  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(var(--side-arrow-size));
  }
}

@media (prefers-color-scheme: light) {

  #get-location {
    box-shadow: 20px 20px 60px #5d5d5d, -20px -20px 60px #505050;
  }
}