/* 排盘一级分类：与书籍/题库的分类轨道保持同一层级和触控密度。 */
.paipan-category-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  width: calc(100% - 40px);
  min-width: 0;
  margin: 4px 20px 24px;
  padding: 3px;
  border: 1px solid rgba(32, 35, 33, 0.08);
  border-radius: 12px;
  background: rgba(32, 35, 33, 0.06);
  box-sizing: border-box;
  overflow: hidden;
}

.paipan-category-tab {
  flex: 1 1 0;
  min-width: 0;
  min-height: 42px;
  padding: 0 14px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--muted, #68706a);
  font: inherit;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: color 0.16s ease, background 0.16s ease, box-shadow 0.16s ease;
}

.paipan-category-tab:hover,
.paipan-category-tab:focus-visible {
  color: var(--cinnabar, #b94132);
  background: rgba(var(--accent-rgb, 185, 65, 50), 0.08);
}

.paipan-category-tab:focus-visible {
  outline: 3px solid rgba(var(--accent-rgb, 185, 65, 50), 0.18);
  outline-offset: -2px;
}

.paipan-category-tab.is-active {
  color: #fffdf7;
  background: var(--cinnabar, #b94132);
  box-shadow: 0 5px 14px rgba(var(--accent-rgb, 185, 65, 50), 0.2);
}

.paipan-nav-item[data-paipan-category-hidden="true"] {
  display: none !important;
}

.paipan-tools-item[data-paipan-category-hidden="true"] {
  display: none !important;
}

.paipan-tool-picker-category-heading {
  grid-column: 1 / -1;
  margin: 8px 2px 2px;
  padding: 4px 6px 2px;
  color: var(--muted, #68706a);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.3;
}

.paipan-tool-picker-category-heading:first-child {
  margin-top: 2px;
}

html.dark .paipan-tool-picker-category-heading {
  color: #bac3bd;
}

html.dark .paipan-category-nav {
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.06);
}

html.dark .paipan-category-tab {
  color: #bac3bd;
}

html.dark .paipan-category-tab.is-active {
  color: #fff7f1;
  background: var(--cinnabar, #b94132);
}

@media (max-width: 760px) {
  .paipan-category-nav {
    width: calc(100% - 36px);
    margin: 4px 18px 24px;
    padding: 4px;
    border: 0;
  }

  .paipan-category-tab {
    min-height: 40px;
    padding: 0 10px;
    font-size: 14px;
  }
}

/* 手机端与书籍阅读的 18px 内容轨道对齐；排盘右侧展开按钮仍保留，
   这里只统一二级滚动轨道的左边缘和上下内边距。 */
@media (max-width: 760px) {
  .paipan-tool-frame .paipan-nav-shell {
    width: calc(100% - 36px);
    margin-right: 18px;
    margin-left: 18px;
  }

  .paipan-tool-frame .paipan-nav-shell .paipan-nav {
    padding-right: 0;
    padding-left: 0;
  }
}