/* ====================================================================
   RIGHT RAIL — slot content for io-shell__right
   ==================================================================== */

/* Author-defined `display: flex` on .rail / .reader-rail ties on specificity
   with the UA `[hidden] { display: none }` rule and source-order wins —
   meaning both rails would render at once. Force the hidden attr to win on
   these specific elements so reader-aside.js can toggle them. */
[data-rail][hidden] { display: none !important; }

.rail {
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  height: 100%;
  font-family: var(--io-font-mono);
}

/* Any section flagged as "bottom-pinned" eats whatever vertical slack is
   left in the rail above it — so proc/self/status (and anything else we
   stamp this on later) anchors to the bottom edge regardless of how many
   sections sit above. Margin-top:auto in a flex column is the cleanest
   way to do this without absolute positioning + height calc games. */
.rail > .rail-section-bottom { margin-top: auto; }

/* ─── reading card ─── */

.reading-card {
  margin-top: 10px;
  padding: 12px;
  background: var(--io-surface-base);
  border: 1px solid var(--io-border);
  border-radius: var(--io-radius-sm);
}

.reading-now {
  font-family: var(--io-font-display);
  font-size: 10px;
  color: var(--io-accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.reading-title {
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-sm);
  color: var(--io-text-primary);
  letter-spacing: 0.02em;
}

.reading-author {
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-micro);
  color: var(--io-text-tertiary);
  margin-top: 4px;
}

.reading-progress-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.reading-progress {
  flex: 1;
  height: 3px;
  background: var(--io-surface-overlay);
  border-radius: 2px;
  overflow: hidden;
  display: block;
}

.reading-progress > span {
  display: block;
  height: 100%;
  background: var(--io-accent-dim);
}

.reading-pct {
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-micro);
  color: var(--io-text-tertiary);
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
  min-width: 28px;
  text-align: right;
}

/* ─── trending tags ─── */

.trend-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-top: 10px;
}

.trend-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-sm);
  color: var(--io-text-secondary);
  text-decoration: none;
  border-radius: var(--io-radius-sm);
  transition: background 120ms ease, color 120ms ease;
  letter-spacing: 0.02em;
}

.trend-row:hover {
  background: var(--io-surface-overlay);
  color: var(--io-text-primary);
}

.trend-row .hash {
  color: var(--io-accent);
  margin-right: 1px;
}

.trend-row .cold {
  font-size: var(--io-fs-micro);
  color: var(--io-text-tertiary);
  font-variant-numeric: tabular-nums;
}

.trend-row .hot {
  color: var(--io-accent);
  font-variant-numeric: tabular-nums;
}

.trend-row .hot .arr {
  margin-right: 2px;
}

/* ─── threads ─── */

.threads {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.thread-empty {
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-micro);
  color: var(--io-text-tertiary);
  font-style: italic;
  padding: 18px 10px;
  text-align: center;
  border: 1px dashed var(--io-border-subtle);
  border-radius: var(--io-radius-sm);
}

/* ─── proc/self/status ─── */

.status-card {
  margin-top: 10px;
  padding: 12px 14px;
  background: var(--io-surface-base);
  border: 1px solid var(--io-border);
  border-radius: var(--io-radius-sm);
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-micro);
}

.status-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 3px 0;
  gap: 10px;
}

.status-line .k {
  color: var(--io-text-tertiary);
  letter-spacing: 0.02em;
}

.status-line .v {
  color: var(--io-text-secondary);
  font-variant-numeric: tabular-nums;
}

.status-line .v.accent {
  color: var(--io-accent);
}

/* ─── rail recent-comments list (default + reader rail share this) ─── */

.rail-comments {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.rail-comment-row {
  display: grid;
  grid-template-columns: 26px 1fr;
  align-items: start;
  gap: 8px;
  padding: 7px 10px;
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-micro);
  color: var(--io-text-secondary);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: var(--io-radius-sm);
  transition: background 120ms ease, border-color 120ms ease;
}

.rail-comment-row:hover {
  background: var(--io-surface-overlay);
  border-left-color: var(--io-accent);
}

.rail-comment-avatar {
  width: 26px;
  height: 26px;
  display: block;
  object-fit: cover;
  border-radius: var(--io-radius-sm);
  background: var(--io-surface-overlay);
  border: 1px solid var(--io-border);
  margin-top: 2px;
}

.rail-comment-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.rail-comment-head {
  display: flex;
  align-items: center;
  gap: 6px;
}

.rail-comment-author {
  letter-spacing: 0.02em;
}

.rail-comment-preview {
  color: var(--io-text-tertiary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.45;
}

/* ─── post-scoped comments (reader rail only) — H1-hook badges ─── */

.rail-post-comments {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 10px;
}

.rail-post-comment {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 10px;
  align-items: start;
  padding: 6px 8px;
  text-decoration: none;
  border-radius: var(--io-radius-sm);
  border-left: 2px solid transparent;
  transition: background 120ms ease, border-color 120ms ease;
}

.rail-post-comment:hover {
  background: var(--io-surface-overlay);
  border-left-color: var(--io-accent);
}

/* Mirrors .reader-body h1::before — small accent-bordered pixel hook so the
   rail reads like an extension of the post's own section markers. */
.rail-post-comment-hook {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 18px;
  padding: 0 4px;
  border: 1px solid var(--io-accent-dim);
  background: var(--io-accent-subtle);
  color: var(--io-accent);
  font-family: var(--io-font-pixel);
  font-size: 8px;
  line-height: 1;
  letter-spacing: 0.08em;
  margin-top: 2px;
}

.rail-post-comment-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.rail-post-comment-author {
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-micro);
  color: var(--io-text-primary);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.rail-post-comment-preview {
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-micro);
  color: var(--io-text-tertiary);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}

/* ════════════════════════════════════════════════════════════════════════
   READER RAIL — shown on /blog/<slug>; reader-aside.js toggles via [hidden]
   ════════════════════════════════════════════════════════════════════════ */

.reader-rail {
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  height: 100%;
  font-family: var(--io-font-mono);
}

/* ─── reading progress bar ─── */

.reader-prog {
  margin-top: 10px;
  height: 4px;
  background: var(--io-surface-overlay);
  border-radius: 2px;
  overflow: hidden;
}

.reader-prog-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--io-accent-dim), var(--io-accent), var(--io-accent-bright));
  box-shadow: 0 0 6px var(--io-accent-glow);
  transition: width 90ms linear;
}

.reader-prog-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-micro);
  color: var(--io-text-tertiary);
  font-variant-numeric: tabular-nums;
}

.reader-prog-meta .reader-prog-pct {
  color: var(--io-accent);
  font-weight: 700;
}

.reader-prog-meta .sep {
  opacity: 0.5;
}

.reader-prog-meta .reader-prog-sect {
  color: var(--io-text-secondary);
}

/* ─── table of contents ─── */

.reader-toc {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 1px;
  /* Cap height so a 30-section post still scrolls inside the rail rather
     than pushing the page layout. */
  max-height: calc(100vh - 240px);
  overflow-y: auto;
  overflow-x: hidden;
}

.reader-toc-link {
  position: relative;
  display: block;
  padding: 5px 10px 5px 14px;
  font-family: var(--io-font-mono);
  font-size: var(--io-fs-sm);
  color: var(--io-text-tertiary);
  text-decoration: none;
  border-left: 2px solid transparent;
  letter-spacing: 0.01em;
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 120ms ease, border-color 120ms ease, background 120ms ease;
}

.reader-toc-link:hover {
  color: var(--io-text-primary);
  background: var(--io-surface-overlay);
}

.reader-toc-link.on {
  color: var(--io-accent);
  border-left-color: var(--io-accent);
  background: var(--io-accent-subtle);
}

.reader-toc-h1 { padding-left: 14px; }
.reader-toc-h2 { padding-left: 26px; font-size: var(--io-fs-micro); }
.reader-toc-h3 { padding-left: 38px; font-size: var(--io-fs-micro); color: var(--io-text-disabled); }

.reader-toc-h3.on,
.reader-toc-h3:hover {
  color: var(--io-text-secondary);
}

/* sidebar scrollbar — match the .pub-aside.sc treatment */
.reader-toc::-webkit-scrollbar { width: 6px; }
.reader-toc::-webkit-scrollbar-track { background: transparent; }
.reader-toc::-webkit-scrollbar-thumb { background: var(--io-border); border-radius: 3px; }
.reader-toc::-webkit-scrollbar-thumb:hover { background: var(--io-accent-dim); }