#l13rc-book .top-bar .l13rc-index-link {
  flex: 0 0 auto;
  font-size: clamp(0.72rem, 2vw, 0.82rem);
  font-weight: 800;
  color: var(--l13rc-accent-ink, #6d28d9);
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border-radius: 10px;
  border: 2px solid var(--l13rc-accent, #7c3aed);
  background: linear-gradient(180deg, #f5f3ff, #ede9fe);
  box-shadow: 0 2px 0 rgba(124, 58, 237, 0.18);
  white-space: nowrap;
}
#l13rc-book .top-bar .l13rc-index-link:hover { filter: brightness(1.05); }
@media (min-width: 720px) {
  #l13rc-book .top-bar { justify-content: space-between; text-align: left; padding: 8px 14px; }
  #l13rc-book .top-bar .top-bar-main { text-align: left; }
}