body {
  margin: 0;
  font-family: sans-serif;
  background: #eee;
}

#game {
  display: flex;
  padding: 10px;
}

#board {
  background: #f0f0f0;
  border: 1px solid #ccc;
  margin-right: 10px;
}

#sidebar {
  width: 160px;
  height: 450px;
  overflow-y: auto;
  background: #ddd;
  padding: 10px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 10px;
}