body {
  margin: 0px;
  background: #1f2833;
  color: white;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 20px;
}

.board {
  width: 40%;
  height: 80%;
  min-width: 300px;
  margin: auto;
}

.row {
  display: flex;
  justify-content: space-around;
}

.wrap{
  flex-wrap:wrap;
}

.block {
  height: calc(100vh * (0.15));
  width: calc(100vh * (0.15));
  background: transparent;
  border: 1px white solid;
  cursor: pointer;
  color: #66fcf1;
  font-size: calc(100vh * (0.1));
  margin: 10px;
  display: flex;
  justify-content: center;
  align-items: center;

}

.btn {
  min-width: 100px;
  height: 40px;
  font-size: 20px;
  background: transparent;
  color: white;
  margin: auto;
}

.btn:hover {
  min-width: 100px;
  height: 40px;
  font-size: 20px;
  color: #66fcf1;
  cursor: pointer;
  margin: auto;
}