/* 静室 · 33-catalog-index.css
   完整目录页（/archive）的摊开视图：左侧分类索引常驻 + 右侧按分类分区摊开全部文章。
   只负责这一页的布局与紧凑列表，不改动其他页面的既有规则。 */

/* ===== 页头 ===== */
.catalog-head { padding-block: var(--space-8) var(--space-6); border-bottom: 1px solid var(--border-subtle); }
.catalog-head .eyebrow { margin: 0 0 10px; }
.catalog-head h1 {
  font-family: var(--font-ui);
  font-size: var(--publication-h1);
  font-weight: 500;
  letter-spacing: -0.012em;
  margin: 0 0 14px;
}
.catalog-lead {
  font-size: 15px; line-height: 1.85; color: var(--text-secondary);
  max-width: 52ch; margin: 0 0 14px;
}
.catalog-alt { font-size: 13px; margin: 0; color: var(--text-muted); }
.catalog-alt a { color: var(--action-primary); text-decoration: none; }
.catalog-alt .footer-sep { margin-inline: 8px; }

/* ===== 两列布局：索引 + 内容 ===== */
.catalog-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 44px;
  align-items: start;
  padding-block: var(--space-6) 0;
}

/* ===== 左侧分类索引（常驻） ===== */
.catalog-nav {
  position: sticky;
  top: 96px;
  align-self: start;
  max-height: calc(100vh - 140px);
  overflow-y: auto;
  padding-right: 4px;
}
.catalog-nav-kicker {
  font-size: 12px; letter-spacing: 0.06em; color: var(--text-muted);
  margin: 0 0 12px; text-transform: uppercase;
}
.catalog-nav-list { list-style: none; margin: 0 0 16px; padding: 0; }
.catalog-nav-link {
  display: flex; justify-content: space-between; align-items: baseline; gap: 10px;
  padding: 8px 12px; border-radius: 8px;
  font-size: 14px; text-decoration: none; color: var(--text-secondary);
  border-left: 2px solid transparent;
}
.catalog-nav-link:hover { background: var(--surface-subtle); color: var(--text-primary); }
.catalog-nav-link.is-active {
  background: var(--surface-subtle);
  border-left-color: var(--action-primary);
  color: var(--text-primary);
}
.catalog-nav-link strong { font-weight: 500; }
.catalog-nav-count {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.catalog-nav-total {
  font-size: 12px; color: var(--text-muted); margin: 0;
  padding-top: 12px; border-top: 1px solid var(--border-subtle);
}

/* ===== 首屏快速入口：四条路径 ===== */
.catalog-quick {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-block: 22px 4px;
}
.catalog-quick-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 18px 20px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--surface-canvas);
  text-decoration: none;
  color: inherit;
  transition: var(--transition-control);
}
.catalog-quick-item:hover {
  border-color: var(--action-primary);
  background: var(--surface-subtle);
  transform: translateY(-1px);
}
.cq-title {
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}
.cq-desc {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* 分类标题右侧的编号区间 */
.catalog-group-range {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 400;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ===== 工具栏：筛选 + 排序 + 展开收起 ===== */
.catalog-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin-block: 20px 14px;
  padding: 14px 16px;
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  background: var(--surface-subtle);
}
.catalog-search { display: flex; align-items: baseline; gap: 12px; flex: 1 1 240px; }
.catalog-search-input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 8px 12px;
  font: inherit; font-size: 14px;
  color: var(--text-primary);
  background: var(--surface-canvas);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
}
.catalog-search-input:focus { outline: 2px solid var(--accent-soft); outline-offset: 1px; border-color: var(--action-primary); }
.catalog-search-count { font-size: 12.5px; color: var(--text-muted); white-space: nowrap; }

.catalog-sort { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.catalog-sort-label { font-size: 12px; color: var(--text-muted); margin-right: 6px; }
.catalog-sort-link {
  padding: 5px 11px;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid transparent;
}
.catalog-sort-link:hover { background: var(--surface-canvas); color: var(--text-primary); }
.catalog-sort-link.is-active {
  background: var(--surface-canvas);
  border-color: var(--border-strong);
  color: var(--action-primary);
}

.catalog-expand { display: flex; gap: 8px; margin-left: auto; }
.catalog-expand-btn {
  padding: 6px 13px;
  font: inherit; font-size: 12.5px;
  color: var(--text-secondary);
  background: var(--surface-canvas);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  cursor: pointer;
}
.catalog-expand-btn:hover { color: var(--action-primary); border-color: var(--action-primary); }

/* ===== 右侧：分类分区（标题常驻 + 可收起） ===== */
.catalog-group { margin-bottom: var(--space-7); scroll-margin-top: 96px; }
.catalog-group-title {
  position: sticky;
  top: 88px;
  z-index: 10;
  font-family: var(--font-ui); font-size: 18px; font-weight: 500;
  display: flex; align-items: center; gap: 10px;
  margin: 0 0 10px; padding: 10px 0;
  background: var(--surface-canvas);
  border-bottom: 1px solid var(--border-strong);
}
.catalog-group-toggle {
  flex-shrink: 0;
  width: 24px; height: 24px;
  display: grid; place-items: center;
  padding: 0;
  font: inherit; font-size: 15px; line-height: 1;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  cursor: pointer;
}
.catalog-group-toggle:hover { color: var(--action-primary); border-color: var(--action-primary); }
.catalog-toggle-icon { display: block; }
.catalog-group.is-collapsed .catalog-group-body { display: none; }
.catalog-group.is-collapsed { margin-bottom: var(--space-5); }

/* 每 100 篇一个分隔标记，让长分类有节奏 */
.index-posts-divider {
  list-style: none;
  padding: 14px 0 6px;
  margin-top: 6px;
  border-top: 1px solid var(--border-subtle);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.catalog-group-count {
  font-family: var(--font-mono); font-size: 12px; font-weight: 400;
  color: var(--text-muted); font-variant-numeric: tabular-nums;
}

/* ===== 紧凑文章行（每篇一行，摊开也不显拥挤） ===== */
.catalog-body .index-posts { list-style: none; margin: 0; padding: 0; }
.catalog-body .index-post { border-bottom: 1px solid var(--border-subtle); }
.catalog-body .index-post:last-child { border-bottom: 0; }
.catalog-body .index-post-link {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 6px 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-primary);
  text-decoration: none;
}
.catalog-body .index-post-link:hover { color: var(--action-primary); }
.catalog-body .index-post-number {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-muted);
}
.catalog-body .index-post-date {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-muted);
  margin-left: 12px; font-variant-numeric: tabular-nums;
}
.catalog-body .index-post-star { color: var(--action-primary); }
.catalog-body .index-post--starred .index-post-number { color: var(--action-primary); }

/* ===== 回到顶部 ===== */
.catalog-back-top {
  position: fixed;
  right: 28px; bottom: 28px;
  z-index: 40;
  padding: 10px 18px;
  font: inherit; font-size: 13px;
  color: var(--text-secondary);
  background: var(--surface-canvas);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(16, 24, 40, 0.08);
}
.catalog-back-top:hover { color: var(--action-primary); border-color: var(--action-primary); }

/* ===== 首页：前言折叠（后三段收起，原文一字未改） ===== */
.preface-rest { margin-top: 14px; }
.preface-rest-summary {
  font-size: 13.5px;
  color: var(--action-primary);
  cursor: pointer;
  list-style: none;
  display: inline-block;
}
.preface-rest-summary::-webkit-details-marker { display: none; }
.preface-rest-summary::before { content: "＋ "; }
.preface-rest[open] .preface-rest-summary::before { content: "－ "; }
.preface-rest p { margin-block: 14px 0; }

/* ===== 首页：进入完整目录的入口 ===== */
.catalog-entry {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin-block: var(--space-7);
  padding: 24px 28px;
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  background: var(--surface-subtle);
  text-decoration: none;
}
.catalog-entry:hover { border-color: var(--action-primary); }
.catalog-entry-text { display: flex; flex-direction: column; gap: 6px; }
.catalog-entry-text strong { font-size: 16.5px; font-weight: 500; color: var(--text-primary); }
.catalog-entry-sub { font-size: 13.5px; color: var(--text-muted); }
.catalog-entry-arrow { font-size: 20px; color: var(--action-primary); flex-shrink: 0; }

@media (max-width: 760px) {
  .catalog-entry { padding: 20px; }
  .catalog-entry-text strong { font-size: 15.5px; }
  .catalog-entry-sub { font-size: 13px; }
}

/* ===== 手机：索引移到顶部横向滚动 ===== */
@media (max-width: 760px) {
  .catalog-head { padding-block: var(--space-6) var(--space-5); }
  .catalog-quick { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .catalog-quick-item { padding: 14px 15px 16px; }
  .cq-title { font-size: 14.5px; }
  .cq-desc { font-size: 12px; }
  .catalog-group-range { display: none; }
  .catalog-layout { grid-template-columns: 1fr; gap: 20px; }
  .catalog-nav {
    position: sticky; top: 0; z-index: 20;
    max-height: none; overflow: visible;
    padding-block: 10px;
    background: var(--surface-canvas);
    border-bottom: 1px solid var(--border-subtle);
  }
  .catalog-nav-kicker, .catalog-nav-total { display: none; }
  .catalog-nav-list {
    display: flex; gap: 8px; margin: 0;
    overflow-x: auto; padding-bottom: 2px;
  }
  .catalog-nav-list li { flex: 0 0 auto; }
  .catalog-nav-link {
    border-left: 0; border-bottom: 2px solid transparent;
    padding: 6px 12px; white-space: nowrap;
  }
  .catalog-nav-link.is-active { border-left: 0; border-bottom-color: var(--action-primary); }
  .catalog-group { scroll-margin-top: 64px; }
  .catalog-body .index-post-link { grid-template-columns: 70px minmax(0, 1fr); gap: 10px; font-size: 14.5px; }
  .catalog-back-top { right: 16px; bottom: 16px; }
}