button {
  --hover-shadows: 16px 16px 33px #121212, -16px -16px 33px #303030;
  --accent: fuchsia;
  font-weight: bold;
  letter-spacing: 0.1em;
  border: none;
  border-radius: 1.1em;
  background-color: #212121;
  cursor: pointer;
  color: white;
  padding: 1em 2em;
  transition: box-shadow ease-in-out 0.3s, background-color ease-in-out 0.1s,
    letter-spacing ease-in-out 0.1s, transform ease-in-out 0.1s;
  box-shadow: 13px 13px 10px #1c1c1c, -13px -13px 10px #262626;
}

button:hover {
  box-shadow: var(--hover-shadows);
}

button:active {
  box-shadow: var(--hover-shadows), var(--accent) 0px 0px 30px 5px;
  background-color: var(--accent);
  transform: scale(0.95);
}