.turbo-progress-bar {
  background: linear-gradient(to right, #ff5722, #ffc107); /* custom color/gradient */
  height: 6px;          /* default is 3px */
  box-shadow: 0 0 10px rgba(255, 87, 34, 0.5);
  transition: width 300ms ease-out, opacity 500ms ease-in;
}