/* ============================================
   READING PROGRESS BAR
   --------------------------------------------
   Shared presentation for the bar injected by js/article-reading.js —
   a fixed 3px fill driven by a bare scaleX transform with no
   transition, so it tracks the scroll exactly. Decorative only
   (aria-hidden in the markup the script injects).

   Imported by articles/articles.css and linked directly by any
   non-article page that opts in with [data-reading-progress].
   ============================================ */
.article-reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 60; /* above content, below nothing functional */
    pointer-events: none;
    background: transparent;
}

.article-reading-progress-fill {
    display: block;
    height: 100%;
    transform-origin: left center;
    transform: scaleX(0);
    background: var(--article-reading-progress-color, #457b9d);
}