body {
  background: #000;
  color: #0ff;
  font-family: monospace;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
}

h1 {
  margin-bottom: 1rem;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#tetris {
  display: grid;
  grid-template-rows: repeat(20, 30px);
  grid-template-columns: repeat(10, 30px);
  gap: 1px;
  background: #111;
  border: 2px solid #0ff;
}

.cell {
  width: 30px;
  height: 30px;
  background-color: #111;
}

.active {
  background-color: #0ff;
}

.fixed {
  background-color: #09f;
}

#score {
  margin-top: 1rem;
  font-size: 1.2rem;
}