.chapter-nav-label-short { display: none; }

.chapter-bar {
  grid-template-columns: minmax(0, 1fr) minmax(96px, 116px) minmax(0, 1fr);
  gap: 8px;
}

.chapter-footer-nav {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.chapter-bar .small-btn,
.chapter-footer-nav .small-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  line-height: 1.15;
  text-align: center;
}

.chapter-bar .small-btn {
  font-size: 13px;
  padding: 13px 8px;
}

.chapter-footer-nav .small-btn {
  font-size: 14px;
  padding: 13px 10px;
}

.chapter-bar select {
  min-width: 0;
  width: 100%;
  text-align: center;
  text-align-last: center;
  order: 0;
}

@media (max-width: 420px) {
  .chapter-nav-label-full { display: none; }
  .chapter-nav-label-short { display: inline; }

  .chapter-bar {
    grid-template-columns: minmax(0, 1fr) minmax(92px, 108px) minmax(0, 1fr);
    gap: 6px;
  }

  .chapter-bar .small-btn,
  .chapter-footer-nav .small-btn {
    min-height: 48px;
    font-size: 12px;
    padding: 12px 8px;
  }

  .chapter-footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }
}