.qpager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto 1rem;
  padding: 0 var(--content-padding);
  box-sizing: border-box;
}

/* 大問ナビ */
.qpager-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1 1 auto;
  min-width: 0;
}

.qpager-arrow {
  appearance: none;
  flex: 0 0 auto;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background: var(--input-bg);
  color: var(--fg);
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    background 0.15s,
    opacity 0.15s;
}

.qpager-arrow:hover:not(:disabled) {
  background: var(--hoverable, var(--highlight-bg));
}

.qpager-arrow:disabled {
  opacity: 0.35;
  cursor: default;
}

.qpager-select-wrap {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.qpager-select {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 100%;
  appearance: none;
  border: 1px solid var(--input-border, var(--border-color));
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--fg);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.5rem 2rem 0.5rem 0.85rem;
  cursor: pointer;
  /* chevron */
  background-image:
    linear-gradient(45deg, transparent 50%, var(--fg-muted) 50%),
    linear-gradient(135deg, var(--fg-muted) 50%, transparent 50%);
  background-position:
    calc(100% - 1rem) center,
    calc(100% - 0.7rem) center;
  background-size:
    6px 6px,
    6px 6px;
  background-repeat: no-repeat;
}

.qpager-badge {
  flex: 0 0 auto;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  color: var(--fg-muted);
  white-space: nowrap;
}

.qpager-badge.selected {
  background: var(--badge-bg);
  color: var(--badge-color);
  border-color: transparent;
}

.qpager-count {
  flex: 0 0 auto;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  color: var(--fg-muted);
  white-space: nowrap;
}

/* ページ表示時の大問ラッパ（スワイプ検出領域） */
.paged-section {
  width: 100%;
}

/* モバイル: トグルとナビを縦に積み、指で押しやすいサイズにする */
@media (max-width: 640px) {
  .qpager {
    gap: 0.6rem;
  }
  .qpager-nav {
    width: 100%;
  }
  .qpager-count {
    display: none;
  }
  .qpager-arrow {
    width: 2.75rem;
    height: 2.75rem;
    font-size: 1rem;
  }
  .qpager-select {
    font-size: 1rem;
    padding-top: 0.65rem;
    padding-bottom: 0.65rem;
  }
}