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

.controls {
  margin: 20px;
}

button, input, select {
  padding: 8px;
  margin: 5px;
}

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

.bar {
  width: 25px;
  margin: 3px;
  background: linear-gradient(to top, #f97316, #fb923c); /* orange gradient */
  display: flex;
  align-items: flex-end;
  justify-content: center;
  color: white;
  font-size: 12px;
  font-weight: bold;
  border-radius: 6px;
  transition: 0.3s;
}

.bar:hover {
  background: linear-gradient(to top, #22c55e, #4ade80); /* green on hover */
}