body {
  font-family: Arial, sans-serif;
  text-align: center;
  background: #0f172a;
  color: white;
}

h1 {
  margin-top: 20px;
}

.controls {
  margin: 20px;
}

button {
  padding: 10px 20px;
  margin: 5px;
  border: none;
  background: #3b82f6;
  color: white;
  cursor: pointer;
  border-radius: 5px;
}

button:hover {
  background: #2563eb;
}

#array-container {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  height: 300px;
  margin-top: 30px;
}

.bar {
  width: 10px;
  margin: 0 2px;
  background: #22c55e;
}