/* ============================================
   《腌笃鲜》维基百科 - Layout
   ============================================ */

.chapter-nav {
  position: sticky;
  top: 0;
  z-index: 130;
  background: var(--bg-card);
  background: color-mix(in srgb, var(--bg-card) 94%, transparent);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 5px 16px rgba(37, 29, 22, 0.06);
  backdrop-filter: blur(12px);
}

.chapter-nav-inner {
  display: flex;
  align-items: stretch;
  justify-content: center;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
}

.chapter-nav-pages {
  display: flex;
  align-items: stretch;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.chapter-nav-pages::-webkit-scrollbar {
  display: none;
}

.book-switcher {
  position: relative;
  flex: 0 0 auto;
  align-self: center;
}

.book-switcher summary {
  display: flex;
  align-items: baseline;
  gap: 7px;
  min-height: 48px;
  padding: 12px 13px;
  color: var(--text-secondary);
  cursor: pointer;
  list-style: none;
  white-space: nowrap;
}

.book-switcher summary::-webkit-details-marker {
  display: none;
}

.book-switcher summary strong {
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: 15px;
}

.book-switcher summary::after {
  content: '';
  width: 6px;
  height: 6px;
  margin: 0 2px 3px 1px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition-fast);
}

.book-switcher[open] summary::after {
  transform: translateY(3px) rotate(225deg);
}

.book-switcher summary:hover,
.book-switcher summary:focus-visible {
  color: var(--accent-fire);
  background: var(--accent-fire-bg);
}

.book-switcher-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 180;
  display: grid;
  min-width: 174px;
  padding: 7px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  box-shadow: var(--shadow-float);
}

.book-switcher-link {
  padding: 9px 11px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  white-space: nowrap;
}

.book-switcher-link:hover,
.book-switcher-link:focus-visible {
  color: var(--accent-fire);
  background: var(--accent-fire-bg);
}

.book-switcher-link.active {
  color: var(--text-primary);
  font-weight: 700;
  background: var(--bg-hover);
}

.chapter-nav-divider {
  align-self: center;
  flex: 0 0 1px;
  width: 1px;
  height: 22px;
  margin: 0 7px 0 2px;
  background: var(--border-light);
}

/* 当前阅读位置：sticky 导航内的超薄指示行，滚入正文后展开 */
.reading-position {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height var(--transition-normal), opacity var(--transition-fast);
}

.reading-position.visible {
  max-height: 34px;
  opacity: 1;
  border-top: 1px solid var(--border-light);
}

.reading-position-text {
  display: block;
  max-width: 1460px;
  margin: 0 auto;
  padding: 7px 20px 8px calc(308px + clamp(28px, 4vw, 64px));
  color: var(--text-secondary);
  font-size: 12.5px;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reading-position .rp-num {
  margin-right: 8px;
  color: var(--accent-gold);
  font-weight: 700;
  letter-spacing: 0.06em;
}

@media (prefers-reduced-motion: reduce) {
  .reading-position {
    transition: none;
  }
}

.chapter-nav-link {
  position: relative;
  flex: 0 0 auto;
  padding: 14px 18px 13px;
  color: var(--text-secondary);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.chapter-nav-link::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 2px;
  background: var(--accent-fire);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.chapter-nav-link:hover,
.chapter-nav-link:focus-visible {
  color: var(--accent-fire);
  background: var(--accent-fire-bg);
}

.chapter-nav-link.active,
.chapter-nav-link[aria-current="page"] {
  color: var(--accent-fire);
}

.chapter-nav-link.active::after,
.chapter-nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.layout {
  display: flex;
  max-width: 1460px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  gap: 28px;
  align-items: flex-start;
}

.sidebar {
  position: sticky;
  top: 70px;
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-sidebar);
  background-image: var(--texture-paper);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: 20px 0;
  max-height: calc(100vh - 90px);
  overflow-y: auto;
  transition: box-shadow var(--transition-normal), background var(--transition-normal);
}

.sidebar:hover {
  box-shadow: var(--shadow-card-hover);
}

.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: #bbb;
}

html[data-theme="dark"] .sidebar::-webkit-scrollbar-thumb {
  background: #59483b;
}

html[data-theme="dark"] .sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--accent-gold);
}

.sidebar-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0 20px 16px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 8px;
}

.sidebar-header h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.sidebar-header span {
  font-size: 12px;
  color: var(--text-secondary);
}

.toc-list,
.toc-sublist {
  list-style: none;
  padding: 0;
}

.toc-sublist {
  padding-left: 0;
  display: none;
}

.toc-section.open > .toc-sublist,
.toc-list.searching .toc-sublist {
  display: block;
}

.toc-item {
  position: relative;
}

.toc-link {
  display: block;
  padding: 8px 20px 8px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  transition: color var(--transition-fast),
              background-color var(--transition-fast),
              border-color var(--transition-fast);
  border-left: 3px solid transparent;
  line-height: 1.5;
  cursor: pointer;
}

/* 章序序号：构建期/运行时给章级目录项注入 data-num */
.toc-section > .toc-link[data-num]::before {
  content: attr(data-num);
  margin-right: 7px;
  color: var(--accent-gold);
  font-size: 12px;
  font-weight: 700;
}

.toc-section.has-children > .toc-link::after {
  content: '›';
  float: right;
  color: var(--text-secondary);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.toc-section.open > .toc-link::after,
.toc-list.searching .toc-section.has-children > .toc-link::after {
  transform: rotate(90deg);
  color: var(--accent-fire);
}

.toc-link:hover {
  color: var(--accent-fire);
  background: var(--accent-fire-bg);
}

.toc-link.active {
  color: var(--accent-fire);
  font-weight: 600;
  background: var(--accent-fire-bg);
  border-left-color: transparent;
  border-radius: 0 999px 999px 0;
  margin-right: 10px;
}

.toc-link.h4 {
  padding-left: 36px;
  font-size: 13px;
  font-weight: 400;
  color: var(--text-secondary);
}

.toc-link.h4:hover {
  color: var(--accent-fire);
}

.toc-link.h4.active {
  color: var(--accent-fire);
  font-weight: 500;
}

.main-content {
  flex: 1;
  min-width: 0;
}

.content-card {
  background: var(--bg-card);
  background-image: var(--texture-paper);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: 32px clamp(28px, 4vw, 64px) 64px;
  transition: box-shadow var(--transition-normal), background var(--transition-normal);
}

.footer {
  text-align: center;
  padding: 36px 20px 32px;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 2;
}

.footer-message {
  max-width: 960px;
  margin: 0 auto 20px;
}

.footer-message p {
  margin: 0;
}

.footer-message-text {
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.9;
}

.footer-signature {
  margin-top: 7px !important;
  color: var(--accent-gold);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.8;
}

.footer a {
  color: var(--accent-fire);
  font-weight: 500;
}

.footer a:hover {
  text-decoration: underline;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-bottom: 6px;
}

.footer-links a {
  font-size: 14px;
  font-weight: 600;
}

.footer-divider {
  position: relative;
  width: 120px;
  height: 1px;
  background: var(--gold-foil);
  margin: 0 auto 18px;
  border-radius: 0;
  opacity: 0.75;
}

.footer-divider::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 7px;
  height: 7px;
  border: 1px solid var(--accent-gold);
  background: var(--bg-page);
  transform: translate(-50%, -50%) rotate(45deg);
}

noscript .noscript-warning {
  background: var(--color-warning-bg);
  border-left: 4px solid var(--color-warning);
  padding: 16px 20px;
  margin: 20px auto;
  max-width: 1400px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-primary);
}

/* V1.1: 页脚分隔线回归发丝线 */
.footer-divider {
  background: var(--border-light);
}