input {
  display: none;
}
#top {
  position: relative;
  display: inline-block;
  top: 1rem;
  left: 1rem;
  height: var(--block);
}
#top > span {
  display: inline-block;
  height: var(--block);
  width: var(--block);
  border: 1px solid black;
}
label {
  cursor: pointer;
}
#top > span > label {
  width: 100%;
  height: 100%;
  display: inline-block;
  text-align: center;
  line-height: var(--block);
}
#game {
  position: relative;
  left: 1rem;
  top: 2rem;
}
body {--block: 2.5rem;}
@media screen and (max-width: 30rem){
  body {--block: 2rem;}
}
@media screen and (max-width: 23rem){
  body {--block: 1.5rem;}
}
@media screen and (max-width: 16rem){
  body {--block: 1.25rem;}
}