/**
 * Thin indeterminate bar at the top of the viewport (see js/kn-route-progress.js).
 * z-index above .kn-header (200) and search overlay (1200–1300).
 */
.kn-route-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  overflow: hidden;
  background: rgba(17, 17, 17, 0.06);
  z-index: 1500;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 140ms ease, visibility 140ms ease;
}

.kn-route-progress--visible {
  opacity: 1;
  visibility: visible;
}

.kn-route-progress__bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 40%;
  background: linear-gradient(
    90deg,
    rgba(17, 17, 17, 0) 0%,
    rgba(17, 17, 17, 0.85) 50%,
    rgba(17, 17, 17, 0) 100%
  );
  animation: kn-route-progress-sweep 1.1s cubic-bezier(0.45, 0, 0.25, 1) infinite;
}

@keyframes kn-route-progress-sweep {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

@media (prefers-reduced-motion: reduce) {
  .kn-route-progress__bar {
    animation: none;
    width: 100%;
    background: rgba(17, 17, 17, 0.45);
  }
}

body.kn-search-overlay-open .kn-route-progress {
  z-index: 1400;
}