.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 2147483640;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.reading-progress.is-visible {
  opacity: 1;
}

.reading-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--main, #49b1f5), #34d399);
  box-shadow: 0 0 10px rgba(73, 177, 245, 0.35);
  transition: width 0.08s linear;
}

[data-theme="dark"] .reading-progress-bar {
  box-shadow: 0 0 10px rgba(73, 177, 245, 0.45);
}