ul.cloud li[data-weight="1"] { --size: 1; }
ul.cloud li[data-weight="2"] { --size: 2; }
ul.cloud li[data-weight="3"] { --size: 3; }
ul.cloud li[data-weight="4"] { --size: 4; }
ul.cloud li[data-weight="5"] { --size: 5; }
ul.cloud li[data-weight="6"] { --size: 6; }
ul.cloud li[data-weight="7"] { --size: 7; }
ul.cloud li[data-weight="8"] { --size: 8; }
ul.cloud li[data-weight="9"] { --size: 9; }

ul.cloud li {
  /* ... */
}

ul.cloud li {
  --size: 4;
  font-size: calc(var(--size) * 0.25rem + 0.5rem);
  color: #a33;
  display: block;
  /* font-size: 1.5rem; */
  padding: 0.125rem 0.25rem;
  text-decoration: none;
  position: relative;
  opacity: calc((15 - (9 - var(--size))) / 15);
}
ul.cloud li:nth-child(2n+1) { --color: #181; }
ul.cloud li:nth-child(3n+1) { --color: #33a; }
ul.cloud li:nth-child(4n+1) { --color: #c38; }



ul.cloud {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  line-height: 2.5rem;
}