html:root {
  --accent: #fffc4c !important; /* neon yellow */
  --background: #000000 !important; /* pure black */
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
  width: 100%;
  height: 4px;
  background: var(--border-color);
}

.reading-progress__bar {
  width: 0%;
  height: 100%;
  background: var(--accent);
  transition: width 0.1s linear;
}