body {
  font-family: Arial, sans-serif;
  text-align: center;
  background-color: #121212;
  color: white;
}

h1 {
  margin-top: 20px;
}

.controls {
  margin: 20px;
}

select, button {
  padding: 10px;
  margin: 5px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
}

button {
  background-color: #00bcd4;
  color: white;
  cursor: pointer;
}

button:hover {
  background-color: #0199aa;
}

.array {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  height: 350px;
  margin: 20px auto;
  width: 90%;
  border: 2px solid #444;
  border-radius: 8px;
  padding: 10px;
}

.bar {
  width: 20px;
  margin: 2px;
  background-color: #00bcd4;
  border-radius: 4px;
}