/* ============================================================
   Editorial Swiss — A refined theme for Hexo blogs
   Swiss Modernism + Editorial warmth for long-form reading
   ============================================================ */

/* --- CSS Custom Properties (Light Mode) -------------------- */
:root {
  --color-bg: #FAFAFA;
  --color-card: #FFFFFF;
  --color-text: #18181B;
  --color-text-secondary: #52525B;
  --color-text-tertiary: #A1A1AA;
  --color-accent: #2563EB;
  --color-accent-hover: #1D4ED8;
  --color-accent-light: #DBEAFE;
  --color-accent-warm: #F59E0B;
  --color-gold: #6C63FF;
  --color-gold-light: rgba(108, 99, 255, 0.1);
  --color-border: #E4E4E7;
  --color-border-light: #F4F4F5;
  --color-separator: rgba(0, 0, 0, 0.06);
  --color-shadow: rgba(0, 0, 0, 0.04);
  --color-shadow-hover: rgba(0, 0, 0, 0.08);
  --color-highlight: #FEF9C3;
  --color-code-bg: #F4F4F5;
  --color-code-text: #18181B;
  --color-code-header-bg: #E4E4E7;
  --color-code-dot-red: #FF5F56;
  --color-code-dot-yellow: #FFBD2E;
  --color-code-dot-green: #27C93F;
  --color-blockquote-border: #2563EB;
  --color-blockquote-text: #52525B;
  --color-sidebar-bg: #FFFFFF;
  --color-sidebar-hover: #F4F4F5;
  --color-sidebar-active: #DBEAFE;
  --color-tag-bg: #F4F4F5;
  --color-tag-hover: #2563EB;
  --color-toc-bg: #FAFAFA;
  --color-copyright-bg: #FAFAFA;
  --color-table-stripe: #FAFAFA;
  --color-inline-code: #2563EB;
  --color-inline-code-bg: #DBEAFE;
  --color-scrollbar-thumb: #D4D4D8;
  --color-scrollbar-track: transparent;

  --font-display: 'Playfair Display', 'Noto Serif SC', 'Times New Roman', serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;

  --sidebar-width: 260px;
  --content-max-width: 800px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;

  color-scheme: light;
}

/* --- Dark Mode --------------------------------------------- */
html.dark {
  --color-bg: #09090B;
  --color-card: #18181B;
  --color-text: #FAFAFA;
  --color-text-secondary: #A1A1AA;
  --color-text-tertiary: #71717A;
  --color-accent: #60A5FA;
  --color-accent-hover: #93C5FD;
  --color-accent-light: #1E3A5F;
  --color-accent-warm: #FBBF24;
  --color-gold: #F5C345;
  --color-gold-light: rgba(245, 195, 69, 0.18);
  --color-border: #27272A;
  --color-separator: rgba(255, 255, 255, 0.06);
  --color-border-light: #1C1C1F;
  --color-shadow: rgba(0, 0, 0, 0.3);
  --color-shadow-hover: rgba(0, 0, 0, 0.5);
  --color-highlight: #713F12;
  --color-code-bg: #1E1E22;
  --color-code-text: #E4E4E7;
  --color-code-header-bg: #2D2D33;
  --color-code-dot-red: #FF5F56;
  --color-code-dot-yellow: #FFBD2E;
  --color-code-dot-green: #27C93F;
  --color-blockquote-border: #60A5FA;
  --color-blockquote-text: #A1A1AA;
  --color-sidebar-bg: #18181B;
  --color-sidebar-hover: #27272A;
  --color-sidebar-active: #1E3A5F;
  --color-tag-bg: #27272A;
  --color-tag-hover: #60A5FA;
  --color-toc-bg: #0F0F12;
  --color-copyright-bg: #0F0F12;
  --color-table-stripe: #0F0F12;
  --color-inline-code: #93C5FD;
  --color-inline-code-bg: #1E3A5F;
  --color-scrollbar-thumb: #3F3F46;
  --color-scrollbar-track: transparent;

  color-scheme: dark;
}

/* --- Base & Reset ------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  overflow-x: hidden;
  transition: background var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--color-accent-hover);
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

::selection {
  background: var(--color-accent);
  color: #FFFFFF;
}

::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-scrollbar-track);
}
::-webkit-scrollbar-thumb {
  background: var(--color-scrollbar-thumb);
  border-radius: 3px;
}

/* --- Layout ------------------------------------------------ */
.site-wrapper {
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar ----------------------------------------------- */
.site-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-sidebar-bg);
  border-right: none;
  box-shadow: 1px 0 0 var(--color-separator);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform .5s ease, background var(--transition-normal), box-shadow .5s ease;
  overflow-y: auto;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  padding: 32px 24px;
  height: 100%;
}

/* Sidebar collapse toggle (desktop only) — sits on boundary */
.sidebar-collapse-btn {
  display: none;
}
@media (min-width: 769px) {
  .sidebar-collapse-btn {
    position: absolute;
    top: 50%;
    right: -14px;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1.5px solid var(--color-separator);
    background: var(--color-sidebar-bg);
    color: var(--color-text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 200ms ease;
    box-shadow: 0 2px 8px var(--color-shadow);
  }
  .sidebar-collapse-btn svg {
    transition: transform 200ms ease;
    width: 14px;
    height: 14px;
  }
  .sidebar-collapse-btn:hover {
    color: var(--color-gold);
    border-color: var(--color-gold);
    box-shadow: 0 0 0 4px var(--color-gold-light), 0 4px 16px var(--color-shadow-hover);
    transform: translateY(-50%) scale(1.1);
  }
  .sidebar-collapse-btn:hover svg {
    transform: translateX(-2px);
  }

  .site-sidebar.collapsed {
    transform: translateX(calc(-100% - 1px));
    box-shadow: none;
  }
  .site-wrapper.sidebar-collapsed .main-content {
    margin-left: 0;
  }

  .sidebar-expand-btn {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    left: 12px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-card);
    color: var(--color-text-secondary);
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1100;
    box-shadow: 0 2px 8px var(--color-shadow);
    transition: all var(--transition-fast);
  }
  .sidebar-expand-btn:hover {
    color: var(--color-gold);
    border-color: var(--color-gold);
    box-shadow: 0 0 0 4px var(--color-gold-light), 0 4px 16px var(--color-shadow-hover);
  }
  .sidebar-expand-btn.visible {
    display: flex;
  }
}

/* --- Search Overlay ------------------------------------------ */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 10001;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 18vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}
.search-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.search-modal {
  width: 560px;
  max-width: 90vw;
  max-height: 70vh;
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateY(-12px);
  transition: transform 200ms ease;
}
.search-overlay.active .search-modal {
  transform: translateY(0);
}

.search-modal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border-light);
}

.search-input {
  flex: 1;
  padding: 10px 14px;
  border: none;
  background: transparent;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1.05rem;
  outline: none;
}
.search-input::placeholder {
  color: var(--color-text-tertiary);
}

.search-close-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--color-text-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.search-close-btn:hover {
  color: var(--color-text);
  background: var(--color-sidebar-hover);
}

.search-results {
  overflow-y: auto;
  max-height: 400px;
  display: none;
}
.search-results.active {
  display: block;
}

.search-result-item {
  display: block;
  padding: 14px 18px;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-light);
  transition: background var(--transition-fast);
}
.search-result-item:last-child {
  border-bottom: none;
}
.search-result-item:hover {
  background: var(--color-sidebar-hover);
}

.search-result-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
}
.search-result-date {
  font-size: 0.78rem;
  color: var(--color-text-tertiary);
  margin-top: 3px;
}
.search-result-empty {
  padding: 24px;
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: 0.9rem;
}
.search-mark {
  background: var(--color-highlight);
  border-radius: 2px;
  padding: 0 2px;
}

.sidebar-profile {
  text-align: center;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-separator);
}

.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-border);
  transition: border-color var(--transition-fast), transform 400ms ease;
}
.profile-avatar:hover {
  border-color: var(--color-gold);
  transform: rotate(180deg);
}

.profile-name {
  display: block;
  margin-top: 12px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  transition: color var(--transition-fast);
}
.profile-name:hover {
  color: var(--color-accent);
}

.profile-bio {
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

/* Sidebar TOC */
.sidebar-toc {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar-toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.sidebar-toc-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-tertiary);
  margin-bottom: 0;
  padding-left: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.toc-expand-all-btn {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--color-text-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  margin-right: 4px;
}
.toc-expand-all-btn:hover {
  color: var(--color-gold);
  background: var(--color-gold-light);
}
.toc-expand-all-btn .toc-expand-icon {
  transition: transform var(--transition-fast);
}
.toc-expand-all-btn.expanded .toc-expand-icon {
  transform: rotate(180deg);
}

.sidebar-toc-content {
  max-height: calc(100vh - 420px);
  overflow-y: auto;
  font-size: 0.82rem;
  padding-right: 4px;
}

.sidebar-toc-content ol {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.sidebar-toc-content ol ol {
  padding-left: 12px;
}

.sidebar-toc-content li {
  margin: 1px 0;
}

.sidebar-toc-content a {
  display: block;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  border-left: 2px solid transparent;
  line-height: 1.5;
}
.sidebar-toc-content a:hover {
  color: var(--color-accent);
  background: var(--color-sidebar-hover);
}
.sidebar-toc-content a.active-toc {
  color: var(--color-gold);
  background: var(--color-gold-light);
  border-left-color: var(--color-gold);
  font-weight: 500;
}

/* Hide h3+ in TOC by default, show h1/h2. Auto-expand h3+ on scroll */
.sidebar-toc-content .toc-child .toc-child {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.35s ease;
}
.sidebar-toc-content .toc-child .toc-child.toc-expanded {
  max-height: 2000px;
  opacity: 1;
}

/* Full-height TOC on post pages */
.sidebar-toc--full {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.sidebar-toc--full .sidebar-toc-content {
  flex: 1;
  max-height: none;
}

/* Sidebar Navigation */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex: 1;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  letter-spacing: -0.01em;
}
.sidebar-nav-item:hover,
.sidebar-nav-item.active {
  color: var(--color-gold);
  background: var(--color-gold-light);
}

.sidebar-nav-item .nav-icon {
  width: 20px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.7;
}

/* Sidebar Social */
.sidebar-social {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--color-separator);
}

.social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text-tertiary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}
.social-link:hover {
  background: var(--color-gold);
  color: #FFFFFF;
}

.sidebar-footer-info {
  margin-top: 16px;
  text-align: center;
  font-size: 0.72rem;
  color: var(--color-text-tertiary);
}

/* --- Main Content ------------------------------------------ */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: margin-left .5s ease;
}

/* --- Header ------------------------------------------------ */
.site-header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 14px 36px;
  border-bottom: none;
  box-shadow: 0 1px 0 var(--color-separator);
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  z-index: 100;
  transition: transform .5s ease, background var(--transition-normal), box-shadow var(--transition-normal);
  backdrop-filter: blur(12px);
  background: rgba(250, 250, 250, 0.82);
}
.site-header.header-hidden {
  transform: translateY(-100%);
}
.site-wrapper.sidebar-collapsed .site-header {
  left: 0;
}

html.dark .site-header {
  background: rgba(24, 24, 27, 0.82);
}

.header-nav {
  display: flex;
  gap: 2px;
}

.header-nav .nav-item {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.header-nav .nav-item:hover {
  color: var(--color-gold);
  background: var(--color-gold-light);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

/* --- Content Area ------------------------------------------ */
.content-area {
  flex: 1;
  max-width: var(--content-max-width);
  width: 100%;
  margin: 0 auto;
  padding: 80px 36px 32px;
  transition: max-width var(--transition-normal);
}

.immersive-mode .content-area {
  animation: immersive-in .6s ease;
}

@keyframes immersive-in {
  from {
    opacity: .92;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Post Cards (Index) ------------------------------------ */
.posts-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.post-card {
  background: var(--color-card);
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}
.post-card:hover {
  border-color: var(--color-gold);
  box-shadow: 0 2px 16px var(--color-shadow-hover);
}

.post-card-cover img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 0;
}

.post-card-body {
  padding: 24px 28px;
}

.post-card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.post-card-title a {
  color: var(--color-text);
  transition: color var(--transition-fast);
}
.post-card-title a:hover {
  color: var(--color-accent);
}

.post-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.82rem;
  color: var(--color-text-tertiary);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.meta-item i {
  font-size: 0.75rem;
}
.meta-item a {
  color: var(--color-text-tertiary);
}
.meta-item a:hover {
  color: var(--color-accent);
}

.post-card-excerpt {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.post-card-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-accent);
  transition: gap var(--transition-fast);
}
.post-card-more::after {
  content: '→';
  transition: transform var(--transition-fast);
}
.post-card-more:hover::after {
  transform: translateX(3px);
}

/* --- Full Post --------------------------------------------- */
.post-full {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
}

.post-header {
  margin-bottom: 36px;
}

.post-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 12px;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.88rem;
  color: var(--color-text-tertiary);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.tag-badge {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-tag-bg);
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.tag-badge:hover {
  background: var(--color-tag-hover);
  color: #FFFFFF;
}

.post-cover {
  margin: 0 0 36px;
}
.post-cover img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* Post TOC */
.post-toc {
  background: var(--color-toc-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 28px;
}

.toc-details {
  font-size: 0.9rem;
}
.toc-summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text);
  user-select: none;
}
.toc-details ol {
  margin-top: 10px;
  padding-left: 20px;
}
.toc-details li {
  margin: 4px 0;
  line-height: 1.6;
}
.toc-details a {
  color: var(--color-text-secondary);
}
.toc-details a:hover {
  color: var(--color-accent);
}

/* --- Post Content Typography ------------------------------- */
.post-content {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-text);
  overflow-wrap: break-word;
}

/* Post heading hierarchy: size + weight + accent + color */
.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  font-family: var(--font-display);
  line-height: 1.25;
  letter-spacing: -0.015em;
}
.post-content h1:first-child,
.post-content h2:first-child,
.post-content h3:first-child {
  margin-top: 0.4em;
}

/* h1 — major section: left accent bar, largest */
.post-content h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 2.5em 0 0.7em;
  padding-left: 16px;
  border-left: 3px solid var(--color-gold);
}

/* h2 — sub-section: bottom rule, clean separation */
.post-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 2.0em 0 0.5em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

/* h3 — sub-sub-section: lighter weight, muted, no rule */
.post-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin: 1.6em 0 0.4em;
}

/* h4+ — minor headings */
.post-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 1.4em 0 0.3em;
}
.post-content h5 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin: 1.2em 0 0.3em;
}
.post-content h6 {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 1.0em 0 0.3em;
}

/* Collapsible headings */
.post-content h1,
.post-content h2,
.post-content h3 {
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.post-content h1 .heading-chevron,
.post-content h2 .heading-chevron,
.post-content h3 .heading-chevron {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
  color: var(--color-text-tertiary);
}
.post-content h1.collapsed .heading-chevron,
.post-content h2.collapsed .heading-chevron,
.post-content h3.collapsed .heading-chevron {
  transform: rotate(-90deg);
}
.post-content .heading-chevron {
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.post-content h1:hover .heading-chevron,
.post-content h2:hover .heading-chevron,
.post-content h3:hover .heading-chevron {
  opacity: 1;
}
.post-content h1.collapsed .heading-chevron,
.post-content h2.collapsed .heading-chevron,
.post-content h3.collapsed .heading-chevron {
  opacity: 1;
}
.collapse-section {
  overflow-y: hidden;
  transition: opacity var(--transition-normal), max-height var(--transition-normal);
  max-height: none;
  opacity: 1;
}
.collapse-section.collapsed {
  max-height: 0;
  opacity: 0;
  margin: 0;
  padding: 0;
}

.post-content p {
  margin: 1.1em 0;
}

.post-content a {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.post-content ul,
.post-content ol {
  padding-left: 1.5em;
  margin: 0.8em 0;
}
.post-content li {
  margin: 0.3em 0;
}
.post-content li::marker {
  color: var(--color-text-tertiary);
}

.post-content blockquote {
  margin: 1.2em 0;
  padding: 14px 20px;
  border-left: 3px solid var(--color-blockquote-border);
  background: var(--color-toc-bg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-blockquote-text);
  font-style: italic;
  overflow-wrap: break-word;
  word-break: break-word;
  overflow-x: auto;
}
.post-content blockquote p {
  margin: 0.3em 0;
}

/* Inline code */
.post-content :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 2px 6px;
  border-radius: 3px;
  background: var(--color-inline-code-bg);
  color: var(--color-inline-code);
  font-weight: 500;
}

/* Code block wrapper */
.code-block-wrapper {
  margin: 1.4em 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: var(--color-code-bg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.code-block-wrapper:hover {
  border-color: var(--color-text-tertiary);
  box-shadow: 0 2px 12px var(--color-shadow);
}

/* Code block header bar */
.code-block-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--color-code-header-bg);
  border-bottom: 1px solid var(--color-border);
  user-select: none;
}

/* macOS-style traffic light dots */
.code-dots {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}
.code-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.code-dot-red    { background: var(--color-code-dot-red); }
.code-dot-yellow { background: var(--color-code-dot-yellow); }
.code-dot-green  { background: var(--color-code-dot-green); }

/* Language label */
.code-lang {
  flex: 1;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  letter-spacing: 0.02em;
}

/* Copy button in header */
.code-header-copy {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-text-tertiary);
  font-size: 0.75rem;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.code-header-copy:hover {
  color: var(--color-text);
  background: var(--color-code-bg);
  border-color: var(--color-border);
}

/* Code block pre */
.post-content pre {
  margin: 0;
  padding: 18px 20px;
  background: transparent;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.7;
  border: none;
  border-radius: 0;
  max-height: 480px;
  overflow-y: auto;
}
.post-content pre code {
  padding: 0;
  background: none;
  color: var(--color-code-text);
  font-size: inherit;
  font-weight: 400;
}

/* Scrollbar for code blocks */
.post-content pre::-webkit-scrollbar {
  height: 5px;
  width: 5px;
}
.post-content pre::-webkit-scrollbar-thumb {
  background: var(--color-scrollbar-thumb);
  border-radius: 3px;
}
.post-content pre::-webkit-scrollbar-track {
  background: transparent;
}
.post-content pre::-webkit-scrollbar-corner {
  background: transparent;
}

.post-content table {
  width: 100%;
  margin: 1.2em 0;
  border-collapse: collapse;
  font-size: 0.88rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.post-content th,
.post-content td {
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  text-align: left;
}
.post-content th {
  background: var(--color-toc-bg);
  font-weight: 600;
}
.post-content tr:nth-child(even) td {
  background: var(--color-table-stripe);
}

.post-content hr {
  margin: 2em 0;
  border: none;
  border-top: 1px solid var(--color-border);
}

.post-content img {
  display: block;
  margin: 1.5em auto;
  border-radius: var(--radius-md);
  max-width: 100%;
}

.post-content mark {
  background: var(--color-highlight);
  padding: 1px 4px;
  border-radius: 2px;
}

.post-content .katex-display,
.post-content mjx-container[display="true"] {
  margin: 1.4em 0;
  overflow-x: auto;
  overflow-y: hidden;
}

/* Post Copyright */
.post-copyright {
  margin-top: 36px;
  padding: 16px 20px;
  background: var(--color-copyright-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}
.post-copyright p {
  margin: 2px 0;
}
.post-copyright strong {
  color: var(--color-text);
  margin-right: 4px;
  font-weight: 600;
}

/* Post Navigation */
.post-navigation {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 32px;
}
.post-nav-item {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  max-width: 48%;
}
.post-nav-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 12px var(--color-shadow);
}
.post-nav-item.prev { text-align: left; }
.post-nav-item.next {
  text-align: right;
  justify-content: flex-end;
}
.nav-arrow {
  font-size: 1.1rem;
  color: var(--color-text-tertiary);
  flex-shrink: 0;
}
.nav-text {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Post Comments */
.post-comments {
  margin-top: 36px;
  padding: 28px 32px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

/* --- Pagination -------------------------------------------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.page-btn,
.page-number {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-card);
  transition: all var(--transition-fast);
}
.page-btn:hover,
.page-number:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.page-number.current {
  background: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
}

/* --- Archive / Category / Tag Pages ------------------------ */
.archive-page,
.category-page,
.tag-page {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
}

.page-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.archive-count,
.category-count,
.tag-count {
  font-size: 0.88rem;
  color: var(--color-text-tertiary);
  margin-bottom: 24px;
}

.archive-list {
  display: flex;
  flex-direction: column;
}

.archive-year {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 24px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border-light);
}
.archive-year:first-child {
  margin-top: 0;
}

.archive-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.archive-date {
  font-size: 0.82rem;
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
  white-space: nowrap;
  min-width: 48px;
}

.archive-title {
  font-size: 0.95rem;
  color: var(--color-text);
  transition: color var(--transition-fast);
}
.archive-title:hover {
  color: var(--color-accent);
}

/* Category Cloud */
.category-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.category-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 40px;
  transition: all 250ms cubic-bezier(0.25, 0.8, 0.25, 1.2);
  position: relative;
}
.category-item::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 40px;
  padding: 1px;
  background: linear-gradient(135deg, var(--color-gold), transparent 60%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 250ms ease;
}
.category-item:hover {
  border-color: var(--color-gold);
  box-shadow: 0 4px 16px var(--color-gold-light);
  transform: translateY(-2px);
}
.category-item:hover::before {
  opacity: 1;
}
.category-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.category-count {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-gold);
  background: var(--color-gold-light);
  padding: 3px 10px;
  border-radius: 12px;
  min-width: 26px;
  text-align: center;
  line-height: 1.2;
}

/* Tag Cloud */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.tag-cloud-item {
  display: inline-block;
  padding: 5px 12px;
  background: var(--color-tag-bg);
  border-radius: 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  line-height: 1.6;
}
.tag-cloud-item:hover {
  background: var(--color-accent);
  color: #FFFFFF;
}
.tag-cloud-item sup {
  font-size: 0.7em;
  margin-left: 2px;
  opacity: 0.7;
}

/* --- Links Page -------------------------------------------- */
.links-page {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}
.link-card:hover {
  border-color: var(--color-gold);
  box-shadow: 0 4px 16px var(--color-shadow-hover);
  transform: translateY(-2px);
}

.link-info {
  flex: 1;
  min-width: 0;
}

.link-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.link-desc {
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
  margin: 0;
}

.link-btn {
  flex-shrink: 0;
  padding: 8px 20px;
  background: var(--color-accent);
  color: #FFFFFF;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}
.link-btn:hover {
  background: var(--color-accent-hover);
  color: #FFFFFF;
}

/* --- Footer ------------------------------------------------ */
.site-footer {
  text-align: center;
  padding: 24px 36px 32px;
  color: var(--color-text-tertiary);
  font-size: 0.8rem;
  line-height: 1.8;
}

.site-footer a {
  color: var(--color-text-secondary);
  font-weight: 500;
}
.site-footer a:hover {
  color: var(--color-accent);
}

.footer-runtime {
  color: var(--color-text-tertiary);
  font-size: 0.8rem;
  margin-top: 4px;
}

/* --- Floating Actions (bottom-right) ----------------------- */
.floating-actions {
  position: fixed;
  bottom: 32px;
  right: 32px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 500;
}

.back-to-top,
.dark-toggle-float,
.floating-home,
.search-toggle-float {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  color: var(--color-text-secondary);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  box-shadow: 0 2px 8px var(--color-shadow);
}
.back-to-top {
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
/* Show sun icon in dark mode, moon icon in light mode */
.dark-toggle-float .icon-sun { display: none; }
.dark-toggle-float .icon-moon { display: block; }
html.dark .dark-toggle-float .icon-sun { display: block; }
html.dark .dark-toggle-float .icon-moon { display: none; }

.dark-toggle-float:hover,
.back-to-top:hover,
.floating-home:hover,
.search-toggle-float:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
}
.back-to-top:active,
.dark-toggle-float:active {
  transform: scale(0.95);
}
.back-to-top.visible:active {
  transform: scale(0.95);
}

/* --- Reading Progress Ring (post pages) ---------------------- */
.back-to-top-wrap {
  position: relative;
  width: 52px;
  height: 52px;
}

.progress-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-ring-bg {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 3;
}

.progress-ring-fill {
  fill: none;
  stroke: var(--color-gold);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke-dashoffset 150ms ease-out;
}

.back-to-top-wrap .back-to-top {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  opacity: 0;
  visibility: hidden;
}

.back-to-top-wrap .back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%);
}

.back-to-top-wrap .back-to-top.visible:active {
  transform: translate(-50%, -50%) scale(0.95);
}

/* --- Mobile Menu Overlay ----------------------------------- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 999;
}

/* --- Image Lightbox ----------------------------------------- */
.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 250ms ease;
}
.image-lightbox.visible {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(6px);
}

.lightbox-img {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
  transform: scale(0.92);
  transition: transform 250ms ease;
}
.image-lightbox.visible .lightbox-img {
  transform: scale(1);
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2;
  transition: background 150ms ease;
}
.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Clickable images in posts */
.post-content img {
  cursor: zoom-in;
}
.post-content a img {
  cursor: pointer;
}

/* --- Responsive -------------------------------------------- */
@media (max-width: 1024px) {
  .content-area {
    padding: 72px 28px 32px;
  }
  .post-title {
    font-size: 1.85rem;
  }
}

@media (max-width: 768px) {
  .site-sidebar {
    transform: translateX(-100%);
    box-shadow: none;
  }
  .site-sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 24px var(--color-shadow-hover);
  }

  .sidebar-overlay.active {
    display: block;
  }

  .main-content {
    margin-left: 0;
  }

  .site-header {
    left: 0;
    justify-content: space-between;
    padding: 12px 20px;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .header-nav {
    display: none;
  }

  .content-area {
    padding: 64px 16px 24px;
  }

  .post-title {
    font-size: 1.65rem;
  }

  .post-cover {
    margin: 0 0 24px;
  }
  .post-cover img {
    max-height: 240px;
    border-radius: var(--radius-sm);
  }

  .post-card-body {
    padding: 20px;
  }
  .post-card-title {
    font-size: 1.2rem;
  }

  .post-navigation {
    flex-direction: column;
  }
  .post-nav-item {
    max-width: 100%;
  }

  .archive-page,
  .category-page,
  .tag-page {
    padding: 24px 20px;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .post-comments {
    padding: 20px;
  }

  .code-block-header {
    padding: 8px 12px;
  }
  .post-content pre {
    padding: 14px 16px;
    font-size: 0.8rem;
    max-height: 360px;
  }
  .code-header-copy span {
    display: none;
  }
  .code-dot {
    width: 9px;
    height: 9px;
  }
}

@media (max-width: 480px) {
  .post-card-meta {
    gap: 8px;
    font-size: 0.78rem;
  }
  .post-content {
    font-size: 0.95rem;
  }
  .post-title {
    font-size: 1.45rem;
  }
  .floating-actions {
    bottom: 20px;
    right: 16px;
    gap: 8px;
  }
  .back-to-top,
  .dark-toggle-float,
  .floating-home,
  .search-toggle-float {
    width: 38px;
    height: 38px;
    font-size: 0.9rem;
  }
  .back-to-top-wrap {
    width: 44px;
    height: 44px;
  }
  .back-to-top-wrap .back-to-top {
    width: 34px;
    height: 34px;
  }
  .immersive-toggle {
    width: 38px;
    height: 38px;
    font-size: 0.9rem;
  }
}

/* --- Immersive Reading Mode ------------------------------- */
.immersive-toggle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  box-shadow: 0 2px 8px var(--color-shadow);
}
.immersive-toggle:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
}
.immersive-toggle .icon-enter { display: block; }
.immersive-toggle .icon-exit { display: none; }

.immersive-mode .site-sidebar {
  transform: translateX(calc(-100% - 1px));
  box-shadow: none;
}
.immersive-mode .site-header {
  transform: translateY(-100%);
}
.immersive-mode .main-content {
  margin-left: 0;
}
.immersive-mode .sidebar-expand-btn {
  display: none !important;
}
.immersive-mode .floating-home,
.immersive-mode .dark-toggle-float,
.immersive-mode .search-toggle-float {
  display: none;
}
.immersive-mode .back-to-top {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.immersive-mode .back-to-top-wrap .back-to-top {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%);
}
.immersive-mode .immersive-toggle {
  /* no highlight, keep default appearance */
}
.immersive-mode .immersive-toggle .icon-enter { display: none; }
.immersive-mode .immersive-toggle .icon-exit { display: block; }
.immersive-mode .immersive-toggle:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
}

/* ============================================================
   Entrance Animations
   ============================================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-entry {
  opacity: 0;
  transform: translateY(18px);
}

.animate-entry.animate-in {
  animation: fadeInUp 0.55s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

/* Delay utility classes */
.animate-delay-0   { animation-delay: 0ms; }
.animate-delay-80  { animation-delay: 80ms; }
.animate-delay-160 { animation-delay: 160ms; }
.animate-delay-240 { animation-delay: 240ms; }
.animate-delay-300 { animation-delay: 300ms; }

/* 40ms stagger — archive items, category/tag cloud items */
.animate-stagger-40 > *:nth-child(1)  { animation-delay: 40ms; }
.animate-stagger-40 > *:nth-child(2)  { animation-delay: 80ms; }
.animate-stagger-40 > *:nth-child(3)  { animation-delay: 120ms; }
.animate-stagger-40 > *:nth-child(4)  { animation-delay: 160ms; }
.animate-stagger-40 > *:nth-child(5)  { animation-delay: 200ms; }
.animate-stagger-40 > *:nth-child(6)  { animation-delay: 240ms; }
.animate-stagger-40 > *:nth-child(7)  { animation-delay: 280ms; }
.animate-stagger-40 > *:nth-child(8)  { animation-delay: 320ms; }
.animate-stagger-40 > *:nth-child(9)  { animation-delay: 360ms; }
.animate-stagger-40 > *:nth-child(10) { animation-delay: 400ms; }
.animate-stagger-40 > *:nth-child(11) { animation-delay: 440ms; }
.animate-stagger-40 > *:nth-child(12) { animation-delay: 480ms; }
.animate-stagger-40 > *:nth-child(13) { animation-delay: 520ms; }
.animate-stagger-40 > *:nth-child(14) { animation-delay: 560ms; }
.animate-stagger-40 > *:nth-child(15) { animation-delay: 600ms; }
.animate-stagger-40 > *:nth-child(16) { animation-delay: 640ms; }
.animate-stagger-40 > *:nth-child(17) { animation-delay: 680ms; }
.animate-stagger-40 > *:nth-child(18) { animation-delay: 720ms; }
.animate-stagger-40 > *:nth-child(19) { animation-delay: 760ms; }
.animate-stagger-40 > *:nth-child(20) { animation-delay: 800ms; }

/* 50ms stagger — sidebar nav items, header nav items */
.animate-stagger-50 > *:nth-child(1)  { animation-delay: 50ms; }
.animate-stagger-50 > *:nth-child(2)  { animation-delay: 100ms; }
.animate-stagger-50 > *:nth-child(3)  { animation-delay: 150ms; }
.animate-stagger-50 > *:nth-child(4)  { animation-delay: 200ms; }
.animate-stagger-50 > *:nth-child(5)  { animation-delay: 250ms; }
.animate-stagger-50 > *:nth-child(6)  { animation-delay: 300ms; }
.animate-stagger-50 > *:nth-child(7)  { animation-delay: 350ms; }
.animate-stagger-50 > *:nth-child(8)  { animation-delay: 400ms; }
.animate-stagger-50 > *:nth-child(9)  { animation-delay: 450ms; }
.animate-stagger-50 > *:nth-child(10) { animation-delay: 500ms; }
.animate-stagger-50 > *:nth-child(11) { animation-delay: 550ms; }
.animate-stagger-50 > *:nth-child(12) { animation-delay: 600ms; }
.animate-stagger-50 > *:nth-child(13) { animation-delay: 650ms; }
.animate-stagger-50 > *:nth-child(14) { animation-delay: 700ms; }
.animate-stagger-50 > *:nth-child(15) { animation-delay: 750ms; }
.animate-stagger-50 > *:nth-child(16) { animation-delay: 800ms; }
.animate-stagger-50 > *:nth-child(17) { animation-delay: 850ms; }
.animate-stagger-50 > *:nth-child(18) { animation-delay: 900ms; }
.animate-stagger-50 > *:nth-child(19) { animation-delay: 950ms; }
.animate-stagger-50 > *:nth-child(20) { animation-delay: 1000ms; }

/* 60ms stagger — post cards, post content lists */
.animate-stagger-60 > *:nth-child(1)  { animation-delay: 60ms; }
.animate-stagger-60 > *:nth-child(2)  { animation-delay: 120ms; }
.animate-stagger-60 > *:nth-child(3)  { animation-delay: 180ms; }
.animate-stagger-60 > *:nth-child(4)  { animation-delay: 240ms; }
.animate-stagger-60 > *:nth-child(5)  { animation-delay: 300ms; }
.animate-stagger-60 > *:nth-child(6)  { animation-delay: 360ms; }
.animate-stagger-60 > *:nth-child(7)  { animation-delay: 420ms; }
.animate-stagger-60 > *:nth-child(8)  { animation-delay: 480ms; }
.animate-stagger-60 > *:nth-child(9)  { animation-delay: 540ms; }
.animate-stagger-60 > *:nth-child(10) { animation-delay: 600ms; }
.animate-stagger-60 > *:nth-child(11) { animation-delay: 660ms; }
.animate-stagger-60 > *:nth-child(12) { animation-delay: 720ms; }
.animate-stagger-60 > *:nth-child(13) { animation-delay: 780ms; }
.animate-stagger-60 > *:nth-child(14) { animation-delay: 840ms; }
.animate-stagger-60 > *:nth-child(15) { animation-delay: 900ms; }
.animate-stagger-60 > *:nth-child(16) { animation-delay: 960ms; }
.animate-stagger-60 > *:nth-child(17) { animation-delay: 1020ms; }
.animate-stagger-60 > *:nth-child(18) { animation-delay: 1080ms; }
.animate-stagger-60 > *:nth-child(19) { animation-delay: 1140ms; }
.animate-stagger-60 > *:nth-child(20) { animation-delay: 1200ms; }

@media (prefers-reduced-motion: reduce) {
  .animate-entry,
  .animate-entry.animate-in {
    animation: none !important;
    opacity: 1;
    transform: none;
    animation-delay: 0ms !important;
  }
  .animate-stagger-40 > *,
  .animate-stagger-50 > *,
  .animate-stagger-60 > * {
    animation-delay: 0ms !important;
  }
}