:root {
  --wa-reader-nav-ink: var(--de-ink, var(--pf-ink, var(--lf-ink, var(--mv-ink, var(--qd-ink, var(--sf-ink, var(--ink, #111827)))))));
  --wa-reader-nav-muted: var(--de-muted, var(--pf-muted, var(--lf-muted, var(--mv-muted, var(--qd-muted-2, var(--qd-muted, var(--sf-muted, var(--muted, #64748b))))))));
  --wa-reader-nav-line: var(--de-line, var(--pf-line, var(--lf-line, var(--mv-line, var(--qd-line, var(--sf-line, var(--line, #e5e7eb)))))));
  --wa-reader-nav-soft: var(--de-soft, var(--pf-soft, var(--lf-soft, var(--mv-soft, var(--qd-soft, var(--sf-side, var(--sf-soft, var(--soft, #f8fafc))))))));
  --wa-reader-nav-panel: var(--de-panel, var(--pf-panel, var(--lf-bg, var(--mv-panel, var(--qd-panel, var(--sf-panel, var(--panel, #ffffff)))))));
  --wa-reader-nav-accent: var(--de-info, var(--pf-accent, var(--lf-accent, var(--mv-accent, var(--qd-red, var(--sf-accent, var(--accent-ink, var(--accent, #2563eb))))))));
}

#sidebar .nav-group {
  margin: 6px 0 10px;
  padding-top: 6px;
  border-top: 1px solid color-mix(in srgb, var(--wa-reader-nav-line) 74%, transparent);
}

#sidebar .nav-group:first-child {
  border-top: 0;
  padding-top: 0;
}

#sidebar .nav-group .group-title {
  width: 100%;
  min-height: 34px;
  margin: 0 0 4px;
  padding: 8px 9px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--wa-reader-nav-ink);
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 760;
  line-height: 1.25;
  letter-spacing: 0;
  text-align: left;
  text-transform: none;
}

#sidebar .nav-group .group-title:hover {
  background: var(--wa-reader-nav-soft);
}

#sidebar .nav-group.open > .group-title {
  background: color-mix(in srgb, var(--wa-reader-nav-accent) 9%, var(--wa-reader-nav-panel));
}

#sidebar .group-title-text {
  min-width: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#sidebar .group-count {
  min-width: 24px;
  padding: 1px 7px;
  border: 1px solid var(--wa-reader-nav-line);
  border-radius: 999px;
  color: var(--wa-reader-nav-muted);
  background: color-mix(in srgb, var(--wa-reader-nav-panel) 82%, transparent);
  font-size: 11px;
  font-weight: 720;
  line-height: 1.45;
  text-align: center;
}

#sidebar .group-chevron {
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transform-origin: 50% 50%;
  transition: transform 0.18s ease;
  opacity: 0.72;
}

#sidebar .nav-group.collapsed .group-chevron {
  transform: rotate(-45deg);
}

#sidebar .nav-pages {
  display: grid;
  grid-template-rows: 1fr;
  opacity: 1;
  transform: translateY(0);
  transition: grid-template-rows 0.2s ease, opacity 0.16s ease, transform 0.2s ease;
}

#sidebar .nav-pages-inner {
  min-height: 0;
  overflow: hidden;
  padding: 1px 0 7px;
}

#sidebar .nav-group.collapsed > .nav-pages {
  grid-template-rows: 0fr;
  opacity: 0;
  transform: translateY(-3px);
}

#sidebar .nav-group.collapsed .nav-pages-inner {
  padding-bottom: 0;
}

#sidebar .nav-link {
  position: relative;
  display: block;
  width: 100%;
  margin: 1px 0;
  padding: 6px 10px 6px 22px;
  border-radius: 7px;
  color: var(--wa-reader-nav-muted);
  font-size: 13px;
  font-weight: 480;
  line-height: 1.45;
  text-align: left;
  text-decoration: none;
}

#sidebar button.nav-link {
  border: 0;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
}

#sidebar .nav-link:before {
  content: "";
  position: absolute;
  left: 9px;
  top: 0.85em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.22;
}

#sidebar .nav-link:hover {
  background: var(--wa-reader-nav-soft);
  color: var(--wa-reader-nav-ink);
  text-decoration: none;
}

#sidebar .nav-link.active {
  background: color-mix(in srgb, var(--wa-reader-nav-accent) 12%, var(--wa-reader-nav-panel));
  color: var(--wa-reader-nav-accent);
  font-weight: 720;
}

#sidebar .nav-link.active:before {
  opacity: 0.95;
}

@media (prefers-reduced-motion: reduce) {
  #sidebar .group-chevron,
  #sidebar .nav-pages {
    transition: none;
  }
}