/*
 * Chirping Gridea Theme - Main Styles
 * Pixel-perfect migration from Astro version
 */

/* i18n anti-FOUC: hide the entire body until i18n-boot.js has applied the
   correct language. The .i18n-pending class is added in <head> and removed
   after the first translation. */
html.i18n-pending body {
  opacity: 0 !important;
}

/* === Theme switch: circular reveal via View Transitions API ===
   Ported from the Astro reference site. The toggle is wrapped in
   document.startViewTransition(); the browser snapshots the old root
   and we replace the default cross-fade with a circular clip-path
   expanding/shrinking from the bottom-left corner (—theme-x / —theme-y).

   Directional polish:
     - Switching TO dark:  new (dark) image revealed on top (circle expands).
     - Switching TO light: old (dark) image concealed on top (circle shrinks),
       so the light theme appears to peel through from the corner.
   The origin is fixed at the bottom-left so the sweep always travels
   diagonally toward the top-right. */
@supports (view-transition-name: root) {
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none;
    mix-blend-mode: normal;
  }

  /* Going to dark: animate the NEW snapshot in. */
  html[data-theme-anim='to-dark']::view-transition-old(root) {
    z-index: 1;
  }
  html[data-theme-anim='to-dark']::view-transition-new(root) {
    z-index: 2;
    animation: chirpy-theme-reveal 520ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
  }

  /* Going to light: animate the OLD (dark) snapshot away. */
  html[data-theme-anim='to-light']::view-transition-old(root) {
    z-index: 2;
    animation: chirpy-theme-conceal 520ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
  }
  html[data-theme-anim='to-light']::view-transition-new(root) {
    z-index: 1;
  }

  @keyframes chirpy-theme-reveal {
    from {
      clip-path: circle(0 at var(--theme-x, 0px) var(--theme-y, 100vh));
    }
    to {
      clip-path: circle(var(--theme-radius, 150vmax) at var(--theme-x, 0px) var(--theme-y, 100vh));
    }
  }

  @keyframes chirpy-theme-conceal {
    from {
      clip-path: circle(var(--theme-radius, 150vmax) at var(--theme-x, 0px) var(--theme-y, 100vh));
    }
    to {
      clip-path: circle(0 at var(--theme-x, 0px) var(--theme-y, 100vh));
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none !important;
  }
}

:root {
  /* Light Theme Tokens */
  --bg: oklch(97% 0.0015 264);
  --bg-card: oklch(100% 0 0);
  --border: oklch(91% 0.0025 264);
  --text: oklch(20% 0.012 264);
  --text-soft: oklch(40% 0.01 264);
  --primary: oklch(45% 0.135 264);
  --primary-rgb: 42, 64, 142;
  --primary-content: oklch(99% 0.003 264);
  --accent: oklch(76% 0.135 75);
  --code-bg: #f4f7fb;
  --code-border: rgba(148, 163, 184, 0.24);
  --code-text: #243245;
  --code-toolbar-text: rgba(36, 50, 69, 0.6);
  --code-comment: #7c8798;
  --code-keyword: #c6287a;
  --code-string: #2f8f52;
  --code-number: #b96a12;
  --code-function: #006dca;
  --code-variable: #334155;
  --code-builtin: #0f9b8e;
  
  --sidebar-from: oklch(100% 0 0);
  --sidebar-to: oklch(95% 0.005 264);
  --sidebar-text: oklch(40% 0.01 264);
  --sidebar-muted: oklch(50% 0.012 264);

  /* Dimensions */
  --sidebar-width: 260px;
  --panel-width: 220px;
  --topbar-height: 48px;
  --content-max-width: 1250px;
  --radius-box: 0.5rem;
  --radius-selector: 0.375rem;

  /* Fonts */
  --font-sans: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", "SFMono-Regular", Consolas, ui-monospace, monospace;
}

[data-theme='dark'] {
  --bg: oklch(20% 0.005 264);
  --bg-card: oklch(22% 0.005 264);
  --border: oklch(28% 0.008 264);
  --text: oklch(86% 0.01 264);
  --text-soft: oklch(55% 0.012 264);
  --primary: oklch(72% 0.11 264);
  --primary-content: oklch(15% 0.015 264);
  --code-bg: #141922;
  --code-border: rgba(148, 163, 184, 0.2);
  --code-text: #d7dde8;
  --code-toolbar-text: rgba(255, 255, 255, 0.58);
  --code-comment: #7f8c98;
  --code-keyword: #ff7ab2;
  --code-string: #9ecb6a;
  --code-number: #f5a97f;
  --code-function: #7dcfff;
  --code-variable: #c6d0f5;
  --code-builtin: #73daca;
  
  --sidebar-from: oklch(20% 0.005 264);
  --sidebar-to: oklch(17% 0.005 264);
  --sidebar-text: oklch(75% 0.01 264);
  --sidebar-muted: oklch(55% 0.012 264);
}

/* Base reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  font-size: 15px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: clip;
}

code,
pre,
kbd,
samp {
  font-family: var(--font-mono);
  font-size: 1em;
}

body,
button,
input,
textarea,
select {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
}

body {
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
  width: 100%;
  position: relative;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: 16px;
  top: 12px;
  width: auto;
  height: auto;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  color: var(--text);
  z-index: 1001;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

/* Layout */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: linear-gradient(180deg, var(--sidebar-from) 0%, var(--sidebar-to) 100%);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px;
  z-index: 100;
  transition: transform 0.3s ease;
}

.main-wrapper {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.shell {
  max-width: var(--content-max-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 48px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.topbar {
  position: sticky;
  top: 0;
  min-height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px);
  z-index: 90;
  margin-bottom: 24px;
  margin-left: -48px;
  margin-right: -48px;
  padding-left: 48px;
  padding-right: 48px;
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-right {
  flex: none;
  justify-content: flex-start;
}

@media (min-width: 1280px) {
  .topbar-right {
    width: calc(var(--panel-width) + 40px);
    padding-left: 40px;
  }
}

.topbar-search {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-width: 0;
  height: 36px;
  padding: 0 6px 0 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  color: var(--text-soft);
  cursor: pointer;
  transition: all 0.2s ease;
}

.topbar-search:hover {
  border-color: color-mix(in srgb, var(--primary) 30%, var(--border));
  color: var(--text);
}

.topbar-search span {
  flex: 1;
  text-align: left;
  font-size: 0.8125rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-search kbd {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1;
  min-width: 24px;
  height: 24px;
  padding: 0 6px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-soft);
}

.topbar-site-title {
  display: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.separator {
  color: color-mix(in srgb, var(--text) 30%, transparent);
}

.crumb-current {
  color: var(--text);
  font-weight: 600;
}

.header-action-btn {
  background: none;
  border: none;
  color: var(--text-soft);
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.header-action-btn:hover {
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  color: var(--primary);
}

.sun-icon { display: block; }
.moon-icon { display: none; }

[data-theme='dark'] .sun-icon { display: none; }
[data-theme='dark'] .moon-icon { display: block; }

.site-footer {
  margin-top: auto;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 0.8125rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.footer-author {
  font-weight: 600;
  color: var(--text);
}

.footer-author:hover {
  color: var(--primary);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.shell {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.main-container {
  display: flex;
  gap: 40px;
  flex: 1;
}

.main-column {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.content-area {
  width: 100%;
  padding-bottom: 4.5rem;
  flex: 1 0 auto;
}

.content-area > .page-heading,
.content-area > .archive-wrap,
.content-area > .taxonomy-cloud,
.content-area > .custom-page,
.content-area > .posts-list,
.content-area > .post-list,
.content-area > .post-single,
.content-area > .empty-state,
.content-area > .pagination {
  width: min(100%, 72rem);
  margin-left: auto;
  margin-right: auto;
}

.panel-rail {
  width: var(--panel-width);
  flex: none;
  display: none;
}

@media (min-width: 1280px) {
  .panel-rail {
    display: block;
  }
}

@keyframes image-loading-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Sidebar Components */
.sidebar-header {
  text-align: center;
  margin-bottom: 32px;
}

.avatar-wrap {
  position: relative;
  display: block;
  width: 112px;
  height: 112px;
  border-radius: 50%;
  border: 4px solid var(--bg-card);
  overflow: hidden;
  margin: 0 auto 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  background-color: color-mix(in srgb, var(--bg-card) 95%, var(--primary));
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: filter 0.6s ease, opacity 0.6s ease;
}

.avatar-img.is-loading {
  filter: blur(15px);
  opacity: 0.6;
}

.avatar-wrap.is-loading::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    110deg,
    rgba(255, 255, 255, 0) 8%,
    rgba(255, 255, 255, 0.2) 18%,
    rgba(255, 255, 255, 0) 33%
  );
  background-size: 200% 100%;
  animation: image-loading-shimmer 1.8s linear infinite;
}

.site-title {
  font-size: 1.1875rem;
  font-weight: 600;
  letter-spacing: 0.025em;
  margin-bottom: 4px;
}

.site-title:hover {
  color: var(--primary);
}

.site-bio {
  font-size: 0.875rem;
  color: var(--text-soft);
  font-style: italic;
  max-width: 220px;
}

.sidebar-nav {
  width: 100%;
  flex: 1;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  color: var(--sidebar-text);
  font-size: 0.9375rem;
  font-weight: 700;
  border-radius: var(--radius-selector);
  transition: all 0.2s ease;
}

.nav-link:hover {
  background: rgba(var(--primary-rgb, 42, 64, 142), 0.1);
  color: var(--primary);
}

.nav-link.active {
  background-color: rgba(var(--primary-rgb, 42, 64, 142), 0.12);
  color: var(--primary);
  font-weight: 700;
}

.nav-link.active:hover {
  background: rgba(var(--primary-rgb, 42, 64, 142), 0.2);
  color: var(--primary);
}

.sidebar-bottom {
  width: 100%;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.sidebar-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  flex-wrap: wrap;
}

.sidebar-actions-separator {
  width: 3px;
  height: 3px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--sidebar-muted) 75%, transparent);
  flex: none;
}

.action-btn {
  width: 36px;
  height: 36px;
  padding: 0;
  background: color-mix(in srgb, var(--bg-card) 92%, var(--bg));
  border: 1px solid var(--border);
  color: var(--sidebar-muted);
  cursor: pointer;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
}

.action-btn:hover {
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  color: var(--primary);
}

.social-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--sidebar-muted);
}

.social-link {
  width: 36px;
  height: 36px;
  padding: 0;
  background: color-mix(in srgb, var(--bg-card) 92%, var(--bg));
  border: 1px solid var(--border);
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
}

.action-btn svg,
.social-link svg {
  width: 16px;
  height: 16px;
}

.social-link:hover {
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  color: var(--primary);
}

/* Right Panel Refinement */
.panel-section {
  margin-bottom: 40px;
}

.panel-section-title {
  margin: 0 0 16px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-soft);
}

.aside-list {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border);
  margin-left: 2px;
}

.aside-item {
  display: block;
  padding: 6px 16px;
  font-size: 0.9375rem;
  color: var(--text-soft);
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: all 0.2s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.6;
}

.aside-item:hover {
  color: var(--text);
  border-left-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 5%, transparent);
}

/* Search Modal */
.search-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: min(10vh, 88px) 12px 12px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  overflow-x: hidden;
}

.search-modal.is-visible {
  opacity: 1;
  visibility: visible;
}

.search-modal-content {
  width: min(100%, 650px);
  max-width: calc(100vw - 24px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.2);
  display: flex;
  flex-direction: column;
  max-height: 70vh;
  box-sizing: border-box;
  overflow: hidden;
}

.search-modal-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px;
  border-bottom: 1px solid var(--border);
  color: var(--primary);
  min-width: 0;
}

#search-input {
  flex: 1;
  min-width: 0;
  background: none;
  border: none;
  font-size: 1.125rem;
  color: var(--text);
  outline: none;
}

.search-modal-close {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--text-soft);
  cursor: pointer;
}

.search-modal-results {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.search-no-results {
  padding: 40px;
  text-align: center;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.search-result-item {
  display: block;
  padding: 16px;
  border-radius: 8px;
  transition: background 0.2s;
}

.search-result-item:hover {
  background: color-mix(in srgb, var(--primary) 8%, transparent);
}

.search-result-title {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.search-result-meta {
  font-size: 0.8125rem;
  color: var(--text-soft);
  margin-bottom: 8px;
}

.search-result-abstract {
  font-size: 0.875rem;
  color: var(--text-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-modal-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 50%, transparent);
}

.search-hints {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.75rem;
  color: var(--text-soft);
}

.search-hints kbd {
  font-family: var(--font-mono);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 1px 4px;
  border-radius: 3px;
}

/* Taxonomy & Archive Pages */
.page-heading {
  margin-bottom: 40px;
}

.page-heading h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.page-heading p {
  color: var(--text-soft);
  font-size: 0.95rem;
}

.taxonomy-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.taxonomy-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-selector);
  transition: all 0.2s;
}

.taxonomy-link:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.taxonomy-count {
  font-size: 0.75rem;
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Categories Grid */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.category-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-box);
  transition: all 0.3s ease;
}

.category-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.category-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(var(--primary-rgb, 42, 64, 142), 0.1);
  color: var(--primary);
  border-radius: 12px;
  flex: none;
}

.category-name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}

.category-meta {
  font-size: 0.875rem;
  color: var(--text-soft);
}

.custom-page-body {
  margin-top: 24px;
}

.memo-heatmap-wrap {
  margin-bottom: 24px;
  padding: 20px 20px 14px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--primary) 4%, var(--bg-card)) 0%, var(--bg-card) 100%);
  border: 1px solid color-mix(in srgb, var(--border) 88%, transparent);
  border-radius: var(--radius-box);
  overflow-x: hidden;
  overflow-y: hidden;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.memo-heatmap-wrap::-webkit-scrollbar {
  display: none;
}

.memo-heatmap {
  display: flex;
  justify-content: center;
  width: 100%;
  min-width: 0;
}

.memo-heatmap-shell {
  display: grid;
  gap: 10px;
  width: fit-content;
  max-width: 100%;
  min-width: 0;
  margin: 0 auto;
}

.memo-heatmap-months {
  display: grid;
  grid-template-columns: repeat(var(--memo-weeks), var(--memo-cell-size));
  column-gap: var(--memo-cell-gap);
  padding-left: calc(var(--memo-day-width) + 8px);
  align-items: end;
  width: auto;
  min-width: 0;
  padding-right: var(--memo-tail-space, 12px);
  overflow: visible;
  justify-content: start;
}

.memo-heatmap-month-label {
  font-size: 0.75rem;
  color: var(--text-soft);
  text-align: left;
  white-space: nowrap;
  line-height: 1;
  min-width: 0;
  overflow: visible;
}

.memo-heatmap-body {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  width: auto;
  min-width: 0;
  overflow: hidden;
  justify-content: center;
}

.memo-heatmap-days {
  display: grid;
  grid-template-rows: repeat(7, var(--memo-cell-size));
  row-gap: var(--memo-row-gap, var(--memo-cell-gap));
}

.memo-heatmap-day-label {
  width: var(--memo-day-width);
  min-width: var(--memo-day-width);
  height: var(--memo-cell-size);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding-right: 0;
  font-size: 0.75rem;
}

.memo-heatmap-weeks {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: var(--memo-cell-size);
  grid-template-rows: repeat(7, var(--memo-cell-size));
  column-gap: var(--memo-cell-gap);
  row-gap: var(--memo-row-gap, var(--memo-cell-gap));
  min-width: 0;
  overflow: hidden;
  width: var(--memo-grid-width);
  justify-content: start;
}

.memo-heatmap-cell.is-future {
  opacity: 0.3;
}

.memo-heatmap-cell,
.memo-heatmap-legend-cell {
  width: var(--memo-cell-size, 12px);
  height: var(--memo-cell-size, 12px);
  min-width: var(--memo-cell-size, 12px);
  max-width: var(--memo-cell-size, 12px);
  border-radius: 4px;
  border: 1px solid color-mix(in srgb, var(--border) 76%, transparent);
  background: color-mix(in srgb, var(--primary) 8%, var(--bg));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16);
}

.memo-heatmap-cell[data-level="1"],
.memo-heatmap-legend-cell[data-level="1"] {
  background: color-mix(in srgb, var(--primary) 26%, var(--bg));
}

.memo-heatmap-cell[data-level="2"],
.memo-heatmap-legend-cell[data-level="2"] {
  background: color-mix(in srgb, var(--primary) 42%, var(--bg));
}

.memo-heatmap-cell[data-level="3"],
.memo-heatmap-legend-cell[data-level="3"] {
  background: color-mix(in srgb, var(--primary) 60%, var(--bg));
}

.memo-heatmap-cell[data-level="4"],
.memo-heatmap-legend-cell[data-level="4"] {
  background: color-mix(in srgb, var(--primary) 78%, var(--bg));
}

.memo-heatmap-footer,
.memo-heatmap-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.memo-heatmap-footer {
  justify-content: space-between;
  margin-top: 14px;
  font-size: 0.8125rem;
  color: var(--text-soft);
}

.memo-heatmap-total {
  font-weight: 500;
}

.notes-feed,
.friends-grid {
  display: grid;
  gap: 16px;
}

.friends-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.note-card,
.friend-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-box);
  padding: 20px 22px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

.note-card {
  position: relative;
}

.memo-card {
  padding: 22px 24px 18px;
  border-color: color-mix(in srgb, var(--border) 86%, transparent);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--primary) 3%, var(--bg-card)) 0%, var(--bg-card) 100%);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.memo-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
  border-color: color-mix(in srgb, var(--primary) 18%, var(--border));
}

.note-card::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 20px;
  bottom: 20px;
  width: 4px;
  border-radius: 99px;
  background: color-mix(in srgb, var(--primary) 58%, transparent);
}

.note-card p,
.friend-card-description,
.friend-card-meta {
  color: var(--text-soft);
}

.memo-card-content {
  color: var(--text);
  padding-left: 12px;
}

.memo-card-content p + p {
  margin-top: 0.9rem;
}

.memo-inline-tag,
.memo-card-content a[href*="/tags/"] {
  display: inline-flex;
  align-items: center;
  margin: 0 0.28rem 0.32rem 0;
  padding: 0.28rem 0.72rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--primary) 16%, var(--border));
  background: color-mix(in srgb, var(--primary) 8%, var(--bg-card));
  color: var(--primary);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.2;
  vertical-align: middle;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
}

.memo-card-content a[href*="/tags/"] {
  text-decoration: none;
}

.memo-inline-tag:hover,
.memo-card-content a[href*="/tags/"]:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--primary) 34%, var(--border));
  background: color-mix(in srgb, var(--primary) 12%, var(--bg-card));
}

.memo-card-content > :last-child {
  margin-bottom: 0;
}

.memo-card-date {
  display: inline-block;
  margin-top: 16px;
  margin-left: 12px;
  padding-top: 12px;
  border-top: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  font-size: 0.8125rem;
  color: var(--text-soft);
}

.memo-load-more-wrap {
  display: flex;
  justify-content: center;
  margin-top: 36px;
}

.memo-load-more-btn {
  min-width: 120px;
  padding: 0.7rem 1.8rem;
  border: 1px solid color-mix(in srgb, var(--primary) 18%, var(--border));
  border-radius: 999px;
  background: color-mix(in srgb, var(--primary) 7%, var(--bg-card));
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all 0.2s ease;
}

.memo-load-more-btn:hover {
  transform: translateY(-1px);
  background: color-mix(in srgb, var(--primary) 12%, var(--bg-card));
  border-color: color-mix(in srgb, var(--primary) 32%, var(--border));
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}

.friend-card-link {
  display: flex;
  align-items: center;
  gap: 16px;
  color: inherit;
}

.friend-card-link:hover {
  border-color: color-mix(in srgb, var(--primary) 22%, var(--border));
  background: color-mix(in srgb, var(--primary) 6%, var(--bg-card));
}

.friend-card-avatar-wrap {
  position: relative;
  display: inline-flex;
  width: 48px;
  height: 48px;
  flex: none;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--border);
  background-color: color-mix(in srgb, var(--bg-card) 95%, var(--primary));
}

.friend-card-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  flex: none;
  background: transparent;
  transition: filter 0.6s ease, opacity 0.6s ease;
}

.friend-card-avatar.is-loading {
  filter: blur(15px);
  opacity: 0.6;
}

.friend-card-avatar-wrap.is-loading::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    110deg,
    color-mix(in srgb, var(--bg-card) 65%, transparent) 8%,
    color-mix(in srgb, var(--primary) 12%, transparent) 18%,
    color-mix(in srgb, var(--bg-card) 65%, transparent) 33%
  );
  background-size: 220% 100%;
  animation: image-loading-shimmer 1.8s linear infinite;
  pointer-events: none;
}

.friend-card-content {
  min-width: 0;
}

.friend-card-title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.friend-card-meta {
  margin-top: 12px;
  font-size: 0.875rem;
}

.archive-content {
  font-size: 1.08rem;
  margin-top: 2rem;
  overflow-wrap: break-word;
}

.archive-listing {
  width: min(100%, 42rem);
  margin: 0 auto;
}

.archive-source-list {
  display: none;
}

.archive-year-group {
  margin-bottom: 2rem;
}

.archive-year-group .year {
  display: block;
  margin-bottom: 0.9rem;
  font-size: 2rem;
  line-height: 1.15;
  font-weight: 700;
  color: var(--text);
  margin-left: -0.18rem;
}

.archive-year-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.archive-year-list li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.58rem 0;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
}

.archive-year-list li:last-child {
  border-bottom: none;
}

.archive-year-list .date.day {
  min-width: 1.7rem;
  font-weight: 700;
  color: var(--text);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.archive-year-list .date.month {
  min-width: 2.2rem;
  color: var(--text-soft);
  text-transform: capitalize;
  font-size: 0.92rem;
}

.archive-year-list a {
  min-width: 0;
  color: var(--primary);
  font-size: 1rem;
  line-height: 1.6;
  transition: color 0.2s ease;
}

.archive-year-list a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.archive-empty {
  color: var(--text-soft);
}

.panel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-pill {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(var(--primary-rgb, 42, 64, 142), 0.05);
  border: 1px solid rgba(var(--primary-rgb, 42, 64, 142), 0.1);
  border-radius: 99px;
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 500;
  transition: all 0.3s ease;
}

.tag-pill:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  transform: translateY(-1px);
}

/* Post Cards */
.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-box);
  margin-bottom: 20px;
  overflow: hidden;
  transition: transform 0.2s ease, shadow 0.2s ease;
}

.post-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.post-card-link {
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .post-card-link.has-image {
    grid-template-columns: 1fr 240px;
  }
}

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

.post-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.35;
}

.post-card-excerpt {
  color: var(--text-soft);
  font-size: 0.9rem;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8125rem;
  color: var(--text-soft);
  line-height: 1;
}

.post-card-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  line-height: 1;
}

.post-card-meta .meta-item svg {
  flex: none;
  width: 14px;
  height: 14px;
  opacity: 0.9;
}

.post-card-image-wrap {
  position: relative;
  height: 180px;
  overflow: hidden;
  background: transparent;
}

.post-card-image-wrap::after,
.post-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      110deg,
      color-mix(in srgb, var(--bg-card) 68%, transparent) 8%,
      color-mix(in srgb, var(--primary) 12%, transparent) 18%,
      color-mix(in srgb, var(--bg-card) 68%, transparent) 33%
    );
  background-size: 220% 100%;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.post-card-image-wrap.is-loading::after,
.post-hero.is-loading::after {
  opacity: 1;
  animation: image-loading-shimmer 1.8s linear infinite;
}

@media (min-width: 768px) {
  .post-card-link.has-image .post-card-image-wrap {
    height: auto;
    border-left: 0;
  }
}

.post-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background-color: transparent;
  transition: filter 0.6s ease, opacity 0.6s ease, transform 0.6s ease;
}

.post-card-image.is-loading,
.post-hero img.is-loading,
.prose img.is-loading {
  filter: blur(20px);
  opacity: 0.6;
  transform: scale(1.05);
  min-height: 100px; /* Ensure there is some height while loading */
}

/* Article Page */
.post-single {
  max-width: 800px;
  margin: 0 auto;
}

.post-header {
  margin-bottom: 32px;
}

.post-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.2;
}

.post-summary {
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 20px;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  color: var(--text-soft);
  font-size: 0.875rem;
}

.post-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pin-icon {
  color: var(--primary);
}

.post-meta-item svg {
  flex: none;
  opacity: 0.85;
}

.post-hero {
  position: relative;
  margin: 0 -24px 32px;
  background: transparent;
  overflow: hidden;
  border-radius: var(--radius-box);
}

.post-hero img {
  width: 100%;
  border-radius: var(--radius-box);
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  border: 0;
  display: block;
  background-color: transparent;
  transition: filter 0.6s ease, opacity 0.6s ease, transform 0.6s ease;
}

.post-footer {
  margin-top: 48px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.post-tags-label {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-soft);
}

.post-tags {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.post-tags::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.post-taxonomy-group {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  width: 100%;
}

.taxon-meta-item {
  color: inherit;
  font-size: inherit;
  font-weight: inherit;
}

.taxon-meta-item:visited {
  color: inherit;
}

.taxon-meta-item svg {
  opacity: 0.85;
}

.taxon-meta-item:hover {
  color: var(--primary);
}

.post-meta .taxon-meta-item,
.post-card-meta .taxon-meta-item {
  transform: none;
}

.taxon-chip,
.tag-meta {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 0.52rem 1rem;
  background: color-mix(in srgb, var(--primary) 8%, var(--bg-card));
  color: var(--primary);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.2;
  transition: all 0.2s ease;
  border: 1px solid color-mix(in srgb, var(--primary) 28%, var(--border));
  white-space: nowrap;
}

.taxon-chip svg,
.tag-meta svg {
  display: none;
}

.taxon-chip--tag,
.taxon-chip--tag:visited {
  color: var(--primary);
}

.taxon-chip--category,
.taxon-chip--category:visited {
  color: var(--primary);
}

.taxon-chip:hover,
.tag-meta:hover {
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 14%, var(--bg-card));
  border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
  transform: translateY(-1px);
}

.taxon-chip:hover svg,
.tag-meta:hover svg {
  opacity: 1;
}

.post-card-meta .taxon-chip {
  font-size: 0.875rem;
}

.post-nav {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.post-nav-card,
.post-nav-placeholder {
  min-height: 0;
}

.post-nav-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius-box);
  background: color-mix(in srgb, var(--bg) 60%, var(--bg-card));
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.post-nav-card:hover {
  background: color-mix(in srgb, var(--border) 40%, var(--bg-card));
  border-color: color-mix(in srgb, var(--primary) 14%, var(--border));
}

.post-nav-body {
  padding: 16px 18px;
}

.post-nav-next {
  text-align: right;
}

.post-nav-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
  color: var(--text-soft);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.post-nav-arrow {
  flex: none;
}

.post-nav-arrow-prev {
  transform: rotate(-90deg);
}

.post-nav-arrow-next {
  transform: rotate(90deg);
}

.post-nav-title {
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
}

.post-nav-next .post-nav-label {
  justify-content: flex-end;
}

.post-nav-placeholder {
  display: none;
}

.pagination {
  margin-top: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.pagination-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.5rem;
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  transition: all 0.2s ease;
}

.pagination-link svg {
  width: 18px;
  height: 18px;
}

.pagination-link:hover {
  color: var(--primary);
}

.pagination-link.is-disabled {
  opacity: 0.08;
  pointer-events: none;
}

.pagination-pages {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
}

.pagination-page {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.4rem;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 4px;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.pagination-page:hover {
  color: var(--primary);
}

.pagination-page.is-current {
  background: var(--primary);
  color: var(--primary-content);
}

.pagination-arrow {
  flex: none;
}

.comments-wrap {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.comments-title {
  font-size: 1.125rem;
  font-weight: 800;
  margin-bottom: 18px;
}

.prose {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
  word-break: break-word;
}

.prose p,
.prose li {
  text-align: justify;
  text-justify: inter-ideograph;
}

.prose > :first-child {
  margin-top: 0;
}

.prose > :last-child {
  margin-bottom: 0;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  line-height: 1.28;
  color: var(--text);
  letter-spacing: -0.02em;
}

.prose h1 { font-size: 2rem; margin-top: 2rem; margin-bottom: 1rem; font-weight: 800; }
.prose h2 { font-size: 1.6rem; margin-top: 2.75rem; margin-bottom: 1rem; border-bottom: 1px solid var(--border); padding-bottom: 0.65rem; font-weight: 800; }
.prose h3 { font-size: 1.3rem; margin-top: 2.25rem; margin-bottom: 0.85rem; font-weight: 700; }
.prose h4 { font-size: 1.12rem; margin-top: 1.75rem; margin-bottom: 0.7rem; font-weight: 700; }
.prose p,
.prose ul,
.prose ol,
.prose table,
.prose pre,
.prose blockquote {
  margin: 1.25rem 0;
}

.prose a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--primary) 35%, transparent);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 0.08em;
}

.prose a:hover {
  text-decoration-color: currentColor;
}

.prose strong {
  font-weight: 700;
  color: var(--text);
}

.prose em {
  color: color-mix(in srgb, var(--text) 85%, var(--primary));
}

.prose ul,
.prose ol {
  padding-left: 1.55rem;
}

.prose li + li {
  margin-top: 0.45rem;
}

.prose li > ul,
.prose li > ol {
  margin-top: 0.55rem;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

.prose :not(pre) > code,
.post-summary code {
  padding: 0.18rem 0.45rem;
  border-radius: 0.45rem;
  border: 1px solid color-mix(in srgb, var(--primary) 12%, var(--border));
  background: color-mix(in srgb, var(--primary) 7%, var(--bg-card));
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.prose blockquote {
  border-left: 4px solid var(--primary);
  background: color-mix(in srgb, var(--primary) 5%, var(--bg-card));
  padding: 18px 22px;
  border-radius: 0 1rem 1rem 0;
  color: var(--text-soft);
}

.prose blockquote > :last-child {
  margin-bottom: 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
  font-size: 0.95rem;
}

.prose thead th {
  background: color-mix(in srgb, var(--primary) 6%, var(--bg-card));
}

.prose th,
.prose td {
  padding: 0.8rem 1rem;
  border: 1px solid var(--border);
  text-align: left;
}

.prose pre {
  font-size: 0.875rem;
  overflow: auto;
  padding: 3.25rem 1.25rem 1.25rem;
  border-radius: 1rem;
  border: 1px solid var(--code-border);
  background: var(--code-bg);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.1);
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.prose pre::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.prose .code-block-shell {
  position: relative;
  margin: 1.25rem 0;
}

.prose .code-block-shell > pre {
  margin: 0;
}

.prose pre code {
  background: transparent !important;
  padding: 0 !important;
  color: inherit !important;
}

/* highlight.js theme overrides */
.hljs {
  background: transparent !important;
  padding: 0 !important;
}

.code-block-shell.is-collapsible > pre {
  transition: max-height 0.24s ease;
}

.code-block-shell.is-collapsible.is-collapsed > pre {
  overflow: hidden;
  max-height: var(--code-collapsed-height, 18rem);
}

.prose .code-block-shell::before {
  content: "";
  position: absolute;
  top: 0.95rem;
  left: 1rem;
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: #ff5f57;
  box-shadow: 1.18rem 0 0 #febc2e, 2.36rem 0 0 #28c840;
  z-index: 2;
}

.prose .code-block-shell::after {
  content: attr(data-code-lang);
  position: absolute;
  top: 0.78rem;
  right: 1rem;
  color: var(--code-toolbar-text);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  pointer-events: none;
  z-index: 2;
}

.code-copy-btn {
  position: absolute;
  top: 0.7rem;
  right: 4.8rem;
  z-index: 3;
  height: 1.65rem;
  padding: 0 0.6rem;
  border: 1px solid color-mix(in srgb, var(--code-toolbar-text) 35%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg-card) 70%, transparent);
  color: var(--code-toolbar-text);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s ease;
}

.code-copy-btn:hover {
  color: var(--code-text);
  border-color: color-mix(in srgb, var(--primary) 26%, var(--code-border));
  background: color-mix(in srgb, var(--bg-card) 92%, var(--bg));
}

.code-copy-btn.is-copied {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 38%, var(--code-border));
}

.code-collapse-btn {
  position: absolute;
  left: 50%;
  bottom: 0.85rem;
  transform: translateX(-50%);
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  min-height: 2rem;
  padding: 0.42rem 0.85rem;
  border: 1px solid color-mix(in srgb, var(--code-border) 85%, var(--border));
  border-radius: 999px;
  background: color-mix(in srgb, var(--code-bg) 90%, var(--bg-card));
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.12);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.code-collapse-btn:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 34%, var(--code-border));
  background: color-mix(in srgb, var(--code-bg) 75%, var(--bg-card));
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.16);
}

.code-collapse-arrow {
  display: inline-block;
  font-size: 0.92rem;
  line-height: 1;
}

.code-collapse-arrow::before {
  content: "↓";
}

.code-block-shell.is-expanded .code-collapse-arrow::before {
  content: "↑";
}

.prose pre code {
  display: block;
  min-width: max-content;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.75;
}

.prose pre .hljs-comment,
.prose pre .hljs-quote,
.prose pre .token.comment,
.prose pre .token.prolog {
  color: var(--code-comment);
}

.prose pre .hljs-keyword,
.prose pre .hljs-selector-tag,
.prose pre .hljs-literal,
.prose pre .token.keyword,
.prose pre .token.atrule {
  color: var(--code-keyword);
}

.prose pre .hljs-string,
.prose pre .hljs-attr,
.prose pre .hljs-template-tag,
.prose pre .token.string,
.prose pre .token.attr-value {
  color: var(--code-string);
}

.prose pre .hljs-number,
.prose pre .hljs-symbol,
.prose pre .token.number,
.prose pre .token.boolean {
  color: var(--code-number);
}

.prose pre .hljs-title,
.prose pre .hljs-title.function_,
.prose pre .hljs-function,
.prose pre .token.function,
.prose pre .token.class-name {
  color: var(--code-function);
}

.prose pre .hljs-variable,
.prose pre .hljs-name,
.prose pre .hljs-selector-id,
.prose pre .token.variable,
.prose pre .token.property {
  color: var(--code-variable);
}

.prose pre .hljs-built_in,
.prose pre .hljs-type,
.prose pre .token.builtin,
.prose pre .token.tag {
  color: var(--code-builtin);
}

.prose img {
  max-width: 100%;
  border-radius: var(--radius-box);
  margin: 32px auto;
  display: block;
  border: 0;
  box-shadow: none;
  background-color: transparent;
  transition: filter 0.6s ease, opacity 0.6s ease, transform 0.6s ease;
}

.prose .bilibili-embed {
  position: relative;
}

/* KaTeX Layout Fix */
.katex-mathml {
  display: none;
}
.katex-html {
  display: inline-block;
}
.katex-display {
  display: block;
  margin: 1em 0;
  text-align: center;
}
.katex-display > .katex {
  display: inline-block;
  text-align: initial;
}
.katex-display > .katex > .katex-html {
  display: block;
}
  width: 100%;
  margin: 1.5rem 0;
  overflow: hidden;
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: #000;
  aspect-ratio: 16 / 9;
}

.prose .bilibili-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

@keyframes image-loading-shimmer {
  from {
    background-position: 200% 0;
  }
  to {
    background-position: -20% 0;
  }
}

/* TOC */
.toc-container {
  position: sticky;
  top: 80px;
  border-left: 1px solid var(--border);
  padding-left: 16px;
}

.toc-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-soft);
  margin-bottom: 12px;
}

.toc-list {
  list-style: none;
  font-size: 0.875rem;
  color: var(--text-soft);
}

.toc-link {
  display: block;
  padding: 4px 0;
  color: var(--text-soft);
  transition: color 0.2s;
  text-decoration: none;
}

.toc-link:hover {
  color: var(--primary);
}

.toc-link.active {
  color: var(--primary);
  font-weight: 600;
}

/* Sidebar Mask & Utilities */
.sidebar-mask {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 99;
  border: none;
  backdrop-filter: blur(4px);
}

.sidebar-mask.is-visible {
  display: block;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  z-index: 100;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Mobile Controls */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
}

@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.is-open {
    transform: translateX(0);
  }
  .main-wrapper {
    margin-left: 0;
  }
  .mobile-nav-toggle {
    display: block;
  }
  .shell {
    padding: 0 20px;
  }

  .topbar {
    margin-left: -20px;
    margin-right: -20px;
    padding-left: 20px;
    padding-right: 20px;
  }

  .post-hero {
    margin-left: -20px;
    margin-right: -20px;
    border-radius: 0;
  }

  .post-hero img {
    border-radius: 0;
  }

  .topbar-search {
    width: 220px;
  }
}

@media (max-width: 720px) {
  .friends-grid {
    grid-template-columns: 1fr;
  }

  #archives.archive-timeline {
    --tl-row-h: 3.15rem;
    --tl-line-x: 5rem;
    --tl-row-start: 7rem;
    width: 100%;
  }

  #archives .archive-list li {
    min-height: var(--tl-row-h);
    line-height: var(--tl-row-h);
    padding-left: var(--tl-row-start);
    font-size: 0.92rem;
    padding-right: 0.55rem;
    margin: 0.34rem 0;
  }

  #archives .year {
    min-height: 3.35rem;
    line-height: 3.35rem;
    font-size: 1.7rem;
    padding-left: 6.1rem;
  }

  #archives .year::before,
  #archives .archive-list li::before {
    left: var(--tl-line-x);
  }

  #archives .year::after {
    width: 12px;
    height: 12px;
    left: calc(var(--tl-line-x) - 4px);
  }

  #archives .day {
    width: calc(var(--tl-line-x) - 0.8rem);
    gap: 0.5rem;
    font-size: 0.86rem;
  }

  #archives .day-full {
    width: calc(var(--tl-line-x) - 0.8rem);
  }

  #archives .day-num {
    font-size: 1.08em;
  }

  #archives .month {
    font-size: 0.9em;
  }

  #archives .archive-list a {
    font-size: 0.9rem;
  }

  #archives .archive-list li > a::before {
    display: none;
  }

  #archives .archive-list li::after {
    width: 9px;
    height: 9px;
    left: calc(var(--tl-line-x) - 3px);
  }

  .breadcrumbs {
    display: none;
  }

  .topbar-site-title {
    display: inline-block;
    font-size: 1.05rem;
    font-weight: 700;
  }

  .topbar-left {
    min-width: 0;
    flex: 1;
    gap: 14px;
  }

  .topbar-right {
    gap: 10px;
  }

  .topbar {
    min-height: 56px;
  }

  .topbar-search,
  .header-action-btn {
    width: 42px;
    height: 42px;
    min-width: 42px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg-card) 92%, var(--bg));
    border-radius: 999px;
    box-shadow: 0 1px 1px rgba(15, 23, 42, 0.03);
  }

  .post-card-link.has-image {
    display: flex;
    flex-direction: column;
  }

  .post-card-link.has-image .post-card-image-wrap {
    order: -1;
    height: auto;
    aspect-ratio: 16 / 9;
    border-left: 0;
    border-bottom: 1px solid var(--border);
  }

  .post-card-body {
    padding: 20px;
  }

  .memo-heatmap-wrap {
    margin-left: -2px;
    margin-right: -2px;
    padding: 14px 12px 10px;
  }

  .memo-heatmap-shell {
    gap: 8px;
  }

  .memo-heatmap-months {
    padding-left: calc(var(--memo-day-width) + 6px);
  }

  .memo-heatmap-day-label {
    font-size: 0.6875rem;
  }

  .memo-heatmap-month-label {
    font-size: 0.625rem;
  }

  .memo-card {
    padding: 18px 18px 16px;
  }

  .note-card::before {
    left: 10px;
    top: 16px;
    bottom: 16px;
  }

  .memo-card-content,
  .memo-card-date {
    margin-left: 8px;
    padding-left: 0;
  }

  .memo-inline-tag,
  .memo-card-content a[href*="/tags/"] {
    font-size: 0.84rem;
    padding: 0.24rem 0.62rem;
    margin-right: 0.24rem;
  }

  .memo-load-more-btn {
    width: 100%;
    min-width: 0;
  }


  .post-title {
    font-size: 2rem;
  }

  .page-heading {
    margin-bottom: 28px;
  }

  .page-heading h1 {
    font-size: 2.1rem;
    margin-bottom: 10px;
  }

  .page-heading p {
    font-size: 0.95rem;
  }

  .post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav-next,
  .post-nav-next .post-nav-label {
    text-align: left;
    justify-content: flex-start;
  }

  .pagination {
    gap: 0.35rem;
  }

  .pagination-link {
    gap: 0.24rem;
    padding: 0.24rem 0.1rem;
    font-size: 0.76rem;
    max-width: 4.5rem;
    min-width: 0;
    line-height: 1.15;
  }

  .pagination-link span {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-wrap: balance;
  }

  .pagination-link svg {
    width: 14px;
    height: 14px;
  }

  .pagination-pages {
    gap: 0.35rem;
  }

  .pagination-page {
    min-width: 1.8rem;
    height: 1.8rem;
    padding: 0 0.25rem;
    font-size: 0.84rem;
  }

  .topbar-search {
    width: 44px;
    min-width: 44px;
    padding: 0;
    justify-content: center;
  }

  .topbar-search span,
  .topbar-search kbd {
    display: none;
  }
}

@media (max-width: 480px) {
  .pagination {
    gap: 0.25rem;
  }

  .pagination-link {
    max-width: 3.8rem;
    font-size: 0.72rem;
    padding: 0.2rem 0.05rem;
  }

  .pagination-link span {
    -webkit-line-clamp: 1;
  }

  .pagination-link svg {
    width: 13px;
    height: 13px;
  }

  .pagination-page {
    min-width: 1.65rem;
    height: 1.65rem;
    font-size: 0.78rem;
  }
}
