body {
  font-family: 'Segoe UI', sans-serif;
  background: #f5f5f5;
  text-align: center;
  margin: 0;
  padding: 20px;
}

h1 {
  color: #333;
  margin-bottom: 20px;
}

.controls {
  margin-bottom: 20px;
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

button {
  padding: 10px 16px;
  background-color: #007bff;
  border: none;
  color: white;
  font-weight: bold;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #0056b3;
}

input[type="range"] {
  vertical-align: middle;
}

#array-container {
  display: flex;
  align-items: flex-end;
  height: 300px;
  max-width: 90vw;
  margin: 0 auto;
  border: 1px solid #ccc;
  background: white;
  padding: 10px;
  border-radius: 8px;
}

.bar {
  margin: 0 1px;
  background-color: #4caf50;
  transition: height 0.2s ease;
}