/* =========================================================================
   LOADING.CSS — page loader (#page-loader in base.html)
   A subtle veil, a thin brand-colour progress bar at the top and a small spinner.
   Uses only tokens from tokens.css (no raw colours here).
   ========================================================================= */

#page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  background: var(--rb-loader-veil);
  transition: opacity .2s var(--rb-ease), visibility .2s var(--rb-ease);
}
#page-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Thin indeterminate bar pinned to the top edge */
#page-loader::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 2px;
  width: 35%;
  background: var(--rb-primary);
  animation: pl-bar 1.1s var(--rb-ease) infinite;
}

#page-loader .pl-inner {
  display: flex;
  align-items: center;
  gap: var(--rb-space-3);
  padding: var(--rb-space-3) var(--rb-space-4);
  background: var(--rb-surface);
  border: 1px solid var(--rb-border);
  border-radius: var(--rb-radius-lg);
  box-shadow: var(--rb-shadow);
}
#page-loader .pl-spinner {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--rb-border-strong);
  border-top-color: var(--rb-primary);
  animation: pl-spin .7s linear infinite;
}
#page-loader .pl-text {
  margin: 0;
  font-size: var(--rb-fs-sm);
  font-weight: var(--rb-fw-medium);
  color: var(--rb-text-muted);
}

/* The loader is only ever visible while a page is loading, so its two
   indicators are the only looping animations in the system. */
@keyframes pl-spin { to { transform: rotate(360deg); } }
@keyframes pl-bar {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(300%); }
}

@media (prefers-reduced-motion: reduce) {
  #page-loader::before,
  #page-loader .pl-spinner { animation: none; }
  #page-loader { transition: none; }
}