/* ===================================
 * Layout Styles
 * Page Layout, Header, Footer, Responsive
 * =================================== */

/* ===================================
 * Page Container
 * =================================== */
.page-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  width: 100%;
  max-width: var(--blog-page-max-width);
  margin: 0 auto;
  padding: calc(var(--blog-header-height) + 32px) 24px 64px;
}

/* ===================================
 * Header — Clean, no heavy elevation
 * =================================== */
.md-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--blog-header-height);
  display: flex;
  align-items: center;
  padding: 0 24px;
  z-index: 1000;
  background: transparent;
  transition: background-color var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard),
              border-color var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
  border-bottom: 1px solid transparent;
}

.md-header.scrolled {
  background: color-mix(in srgb, var(--md-sys-color-background) 88%, transparent);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom-color: var(--md-sys-color-outline-variant);
}

.md-header__leading {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.md-header__title {
  font: var(--md-sys-typescale-title-large);
  font-family: var(--md-sys-typescale-font-family-display);
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.01em;
}

.md-header__nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  justify-content: flex-end;
}

.md-header__nav-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--md-sys-shape-corner-full);
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-large);
  text-decoration: none;
  --_state-color: var(--md-sys-color-on-surface-variant);
  line-height: 1;
  vertical-align: middle;
}

.md-header__nav-item .md-icon {
  font-size: 18px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
}

.md-header__nav-item.active {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  --_state-color: var(--md-sys-color-on-primary-container);
}

.md-header__trailing {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  margin-left: 12px;
}

/* Mobile menu button */
.md-header__menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--md-sys-shape-corner-full);
  border: none;
  background: transparent;
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.md-header__menu-btn:hover {
  background: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent);
}

/* Mobile navigation drawer */
.md-drawer {
  position: fixed;
  top: 0;
  left: -100%;
  width: 280px;
  max-width: 80vw;
  height: 100vh;
  background: var(--md-sys-color-surface-container-low);
  box-shadow: var(--md-sys-elevation-2);
  z-index: 1100;
  transition: left var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
  padding: 24px 0;
  overflow-y: auto;
}

.md-drawer.open {
  left: 0;
}

.md-drawer__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard),
              visibility var(--md-sys-motion-duration-medium);
}

.md-drawer__overlay.open {
  opacity: 1;
  visibility: visible;
}

.md-drawer__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-large);
  text-decoration: none;
  --_state-color: var(--md-sys-color-on-surface-variant);
}

.md-drawer__item.active {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  --_state-color: var(--md-sys-color-on-primary-container);
}

.md-drawer__item .md-icon {
  font-size: 22px;
}

/* Theme toggle */
.md-theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--md-sys-shape-corner-full);
  border: none;
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.md-theme-toggle:hover {
  background: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent);
}

/* ===================================
 * Hero — Slim Brand Bar
 * =================================== */
.md-hero {
  padding: 48px 0 40px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.md-hero__inner {
  max-width: var(--blog-content-max-width);
  margin: 0;
}

.md-hero__title {
  font: var(--md-sys-typescale-display-medium);
  color: var(--md-sys-color-on-surface);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  text-align: left;
}

.md-hero__subtitle {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-primary);
  margin-bottom: 8px;
  text-align: left;
}

.md-hero__description {
  font: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface-variant);
  margin: 0;
  text-align: left;
}

/* ===================================
 * Home Content Layout (posts + sidebar)
 * =================================== */

/* ===================================
 * Home Sections (categories, tags)
 * =================================== */
.home-section {
  max-width: var(--blog-page-max-width);
  margin: 0 auto 24px;
  padding: 0 0 20px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.home-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.home-section__title {
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.home-section__title .md-icon {
  color: var(--md-sys-color-primary);
  font-size: 20px;
}

.home-section__more {
  display: flex;
  align-items: center;
  gap: 4px;
  font: var(--md-sys-typescale-label-medium);
  color: var(--md-sys-color-primary);
  text-decoration: none;
}

.home-section__more:hover {
  text-decoration: underline;
}

/* Home Categories Grid */
.home-categories {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}

.home-category-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--md-sys-shape-corner-medium);
  border: 1px solid var(--md-sys-color-outline-variant);
  text-decoration: none;
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              border-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.home-category-card:hover {
  background: var(--md-sys-color-surface-container);
  border-color: var(--md-sys-color-primary);
  text-decoration: none;
}

.home-category-card__icon {
  width: 32px;
  height: 32px;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.home-category-card__icon .md-icon {
  font-size: 16px;
}

.home-category-card__name {
  font: var(--md-sys-typescale-label-large);
  color: var(--md-sys-color-on-surface);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.home-category-card__count {
  font: var(--md-sys-typescale-label-small);
  color: var(--md-sys-color-on-surface-variant);
  flex-shrink: 0;
  background: var(--md-sys-color-surface-container);
  padding: 2px 8px;
  border-radius: var(--md-sys-shape-corner-full);
}

/* Home Tags */
.home-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.home-tag-chip {
  height: 30px;
  font-size: 0.8125em;
}

.home-tag-chip__count {
  font-size: 0.8em;
  opacity: 0.6;
  margin-left: 2px;
}

/* ===================================
 * Home Content Layout (posts + sidebar)
 * =================================== */
.home-content {
  max-width: var(--blog-page-max-width);
  margin: 0 auto;
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

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

/* ===================================
 * Sidebar
 * =================================== */
.md-sidebar {
  width: 300px;
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--blog-header-height) + 24px);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.md-sidebar__card {
  background: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 28px 20px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.md-sidebar__avatar-wrap {
  display: block;
  margin-bottom: 4px;
  width: 78px;
  height: 78px;
  flex-shrink: 0;
}

.md-sidebar__avatar {
  width: 72px;
  height: 72px;
  border-radius: var(--md-sys-shape-corner-full);
  object-fit: cover;
  border: 3px solid var(--md-sys-color-background);
  box-sizing: border-box;
  display: block;
  margin: 0 auto;
  transition: transform var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.md-sidebar__avatar-wrap:hover .md-sidebar__avatar {
  transform: scale(1.08);
}

.md-sidebar__name {
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface);
  margin: 0;
}

.md-sidebar__bio {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
  margin: 0 0 4px;
  line-height: 1.6;
  white-space: pre-line;
}

/* Stats */
.md-sidebar__stats {
  display: flex;
  justify-content: center;
  gap: 0;
  width: 100%;
  padding: 12px 0 4px;
  margin-top: 4px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
}

.md-sidebar__stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-decoration: none;
  padding: 6px 0;
  border-radius: var(--md-sys-shape-corner-small);
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.md-sidebar__stat:hover {
  background: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent);
  text-decoration: none;
}

.md-sidebar__stat-num {
  font: 600 20px/1.2 var(--md-sys-typescale-font-family-display);
  color: var(--md-sys-color-primary);
}

.md-sidebar__stat-label {
  font: var(--md-sys-typescale-label-small);
  color: var(--md-sys-color-on-surface-variant);
}

/* Sections */
.md-sidebar__section {
  background: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 16px 20px;
}

.md-sidebar__section-title {
  font: var(--md-sys-typescale-title-small);
  color: var(--md-sys-color-on-surface);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Social Buttons */
.md-sidebar__social {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.md-sidebar__social-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--md-sys-shape-corner-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
  position: relative;
  overflow: hidden;
}

.md-sidebar__social-btn:hover {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  text-decoration: none;
}

.md-sidebar__social-btn .md-icon {
  font-size: 20px;
}

/* Friend Links */
.md-sidebar__links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.md-sidebar__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--md-sys-shape-corner-small);
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-body-medium);
  text-decoration: none;
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.md-sidebar__link:hover {
  background: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-primary);
  text-decoration: none;
}

.md-sidebar__link::before {
  content: 'link';
  font-family: 'Material Symbols Rounded';
  font-size: 16px;
  opacity: 0.5;
}

/* ===================================
 * Home Posts Section
 * =================================== */

/* ===================================
 * Post Card — Timeline Style
 * =================================== */
.post-card {
  position: relative;
  padding: 24px 0 24px 0;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

/* Pinned post card */
.post-card--pinned {
  background: color-mix(in srgb, var(--md-sys-color-primary-container) 15%, transparent);
  margin: 0 -16px;
  padding-left: 16px;
  padding-right: 16px;
  border-radius: var(--md-sys-shape-corner-medium);
  border-bottom: none;
}

.post-card__pin-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  padding: 3px 10px 3px 6px;
  border-radius: var(--md-sys-shape-corner-full);
  font: 500 11px/1.3 var(--md-sys-typescale-font-family-ui);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.post-card__pin-badge .md-icon {
  font-size: 14px;
}

/* Post Card Cover Image */
.post-card--has-cover {
  display: flex;
  flex-direction: row;
  gap: 20px;
  align-items: flex-start;
}

.post-card__cover-wrap {
  flex-shrink: 0;
  width: 200px;
  height: 130px;
  border-radius: var(--md-sys-shape-corner-medium);
  overflow: hidden;
  display: block;
}

.post-card__cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
  margin: 0;
}

.post-card__cover-wrap:hover .post-card__cover {
  transform: scale(1.05);
}

.post-card--has-cover .post-card__content {
  flex: 1;
  min-width: 0;
}

.home-posts > .post-card:first-child {
  padding-top: 16px;
}

.home-posts > .post-card:last-child {
  border-bottom: none;
}

.post-card__link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.post-card__link:hover {
  text-decoration: none;
}

.post-card__content {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Meta bar — date prominent, category next to it */
.post-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font: var(--md-sys-typescale-label-medium);
  color: var(--md-sys-color-on-surface-variant);
}

.post-card__date {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  padding: 4px 12px 4px 8px;
  border-radius: var(--md-sys-shape-corner-full);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.post-card__date .md-icon {
  font-size: 14px;
}

.post-card__category {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--md-sys-color-on-surface-variant);
}

.post-card__category .md-icon {
  font-size: 14px;
}

.post-card__category a {
  color: inherit;
  text-decoration: none;
}

.post-card__category a:hover {
  color: var(--md-sys-color-primary);
}

.post-card__stats {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-medium);
  opacity: 0.85;
}

.post-card__stats .md-icon {
  font-size: 14px;
}

.post-card__stats-sep {
  opacity: 0.5;
  margin: 0 2px;
}

/* Title */
.post-card__title {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
  margin: 0;
  line-height: 1.35;
  transition: color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.post-card__title a {
  color: inherit;
  text-decoration: none;
}

.post-card:hover .post-card__title a {
  color: var(--md-sys-color-primary);
}

/* Excerpt */
.post-card__excerpt {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Tags */
.post-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.post-card__tags .md-chip {
  height: 26px;
  font-size: 0.75em;
  padding: 0 10px;
  border-color: var(--md-sys-color-outline-variant);
}

.post-card__tags .md-chip .md-icon {
  font-size: 14px;
}

/* ===================================
 * Post Article — Single Column
 * =================================== */
.post-article {
  max-width: var(--blog-content-max-width);
  margin: 0 auto;
}

/* ===================================
 * Post Header
 * =================================== */
.post-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

/* Post Cover Banner */
.post-header__cover {
  margin: -8px -8px 24px;
  border-radius: var(--md-sys-shape-corner-large);
  overflow: hidden;
  max-height: 360px;
}

.post-header__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  margin: 0;
  border-radius: 0;
}

.post-header__title {
  font: var(--md-sys-typescale-display-small);
  font-family: var(--md-sys-typescale-font-family-display);
  color: var(--md-sys-color-on-surface);
  margin-bottom: 20px;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.post-header__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
}

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

.post-header__meta-item .md-icon {
  font-size: 16px;
  color: var(--md-sys-color-primary);
}

.post-header__meta-item a {
  color: var(--md-sys-color-on-surface-variant);
}

.post-header__meta-item a:hover {
  color: var(--md-sys-color-primary);
}

/* ===================================
 * Post Content Area
 * =================================== */
.post-content {
  font: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface);
  line-height: 1.8;
}

/* ===================================
 * TOC Panel — Slide-out from Right
 * =================================== */
.md-toc-fab {
  position: fixed;
  bottom: 24px;
  right: 96px; /* left of back-to-top FAB */
  height: 48px;
  padding: 0 20px;
  border-radius: var(--md-sys-shape-corner-full);
  border: none;
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  display: none; /* shown only on article pages with headings */
  align-items: center;
  gap: 8px;
  font: 500 14px/1 var(--md-sys-typescale-font-family-ui);
  box-shadow: var(--md-sys-elevation-2);
  z-index: 90;
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              transform var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.md-toc-fab:hover {
  background: var(--md-sys-color-surface-container-highest);
}

.md-toc-fab:active {
  transform: scale(0.96);
}

.md-toc-fab .md-icon {
  font-size: 20px;
}

.md-toc-fab.visible {
  display: flex;
}

.md-toc-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard),
              visibility var(--md-sys-motion-duration-medium);
}

.md-toc-overlay.open {
  opacity: 1;
  visibility: visible;
}

.md-toc-panel {
  position: fixed;
  top: 0;
  right: -360px;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: var(--md-sys-color-surface-container-low);
  box-shadow: var(--md-sys-elevation-3);
  z-index: 1000;
  transition: right var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.md-toc-panel.open {
  right: 0;
}

.md-toc-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface);
  flex-shrink: 0;
}

.md-toc-panel__list {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.md-toc__link {
  display: block;
  padding: 8px 12px;
  border-radius: var(--md-sys-shape-corner-small);
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-body-medium);
  text-decoration: none;
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
  line-height: 1.45;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.md-toc__link:hover {
  background: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-primary);
  text-decoration: none;
}

.md-toc__link.active {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-weight: 500;
}

.md-toc__link.level-3 {
  padding-left: 28px;
  font-size: 0.875em;
}

.md-toc__link.level-4 {
  padding-left: 44px;
  font-size: 0.8125em;
}

/* Hide old sidebar-based TOC */
.post-sidebar,
.md-toc {
  display: none;
}

/* ===================================
 * Footer
 * =================================== */
.md-footer {
  background: var(--md-sys-color-surface-container);
  padding: 32px 24px;
  text-align: center;
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  margin-top: auto;
  box-sizing: border-box;
  width: 100%;
}

.md-footer a {
  color: var(--md-sys-color-primary);
}

.md-footer p {
  margin-bottom: 0.5em;
}

.md-footer p:last-child {
  margin-bottom: 0;
}

.md-footer__links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.md-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--md-sys-color-primary);
  text-decoration: none;
}

.md-footer__link:hover {
  text-decoration: underline;
}

.md-footer__busuanzi {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-body-small);
}

.md-footer__busuanzi .md-icon {
  font-size: 14px;
}

/* ===================================
 * Pagination
 * =================================== */
.md-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  max-width: var(--blog-content-max-width);
  margin-left: auto;
  margin-right: auto;
}

.md-pagination__item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--md-sys-shape-corner-full);
  font: var(--md-sys-typescale-label-large);
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  --_state-color: var(--md-sys-color-on-surface-variant);
}

.md-pagination__item.current {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  --_state-color: var(--md-sys-color-on-primary);
}

.md-pagination__item.disabled {
  opacity: 0.38;
  pointer-events: none;
}

/* ===================================
 * Page Title (archives, categories, tags)
 * =================================== */
.page-title {
  font: var(--md-sys-typescale-headline-large);
  color: var(--md-sys-color-on-surface);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.page-title .md-icon {
  color: var(--md-sys-color-primary);
  font-size: 28px;
}

/* ===================================
 * Archives Page
 * =================================== */
.archives-page {
  max-width: var(--blog-content-max-width);
  margin: 0 auto;
}

.archive-year {
  margin-bottom: 36px;
}

.archive-year__title {
  font: var(--md-sys-typescale-headline-small);
  font-family: var(--md-sys-typescale-font-family-display);
  color: var(--md-sys-color-on-surface);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--md-sys-color-primary-container);
}

.archive-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.archive-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 10px 16px;
  border-radius: var(--md-sys-shape-corner-medium);
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
  text-decoration: none;
}

.archive-item:hover {
  background: var(--md-sys-color-surface-container);
}

.archive-item__date {
  font: var(--md-sys-typescale-label-large);
  color: var(--md-sys-color-on-surface-variant);
  flex-shrink: 0;
  min-width: 90px;
}

.archive-item__title {
  font: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface);
  flex: 1;
}

.archive-item__category {
  display: flex;
  align-items: center;
  gap: 4px;
  font: var(--md-sys-typescale-label-medium);
  color: var(--md-sys-color-on-surface-variant);
  flex-shrink: 0;
}

/* ===================================
 * Categories Page
 * =================================== */
.categories-page {
  max-width: var(--blog-page-max-width);
  margin: 0 auto;
}

.category-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.category-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: var(--md-sys-shape-corner-medium);
  border: 1px solid var(--md-sys-color-outline-variant);
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              border-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
  text-decoration: none;
}

.category-card:hover {
  background: var(--md-sys-color-surface-container);
  border-color: var(--md-sys-color-primary);
  text-decoration: none;
}

.category-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.category-card__icon .md-icon {
  font-size: 22px;
}

.category-card__info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.category-card__name {
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface);
}

.category-card__count {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
}

/* ===================================
 * Tags Page
 * =================================== */
.tags-page {
  max-width: var(--blog-page-max-width);
  margin: 0 auto;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-cloud .md-chip {
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              border-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.tag-cloud .md-chip:hover {
  background: var(--md-sys-color-primary-container);
  border-color: transparent;
  color: var(--md-sys-color-on-primary-container);
}

.md-chip__count {
  font-size: 0.75em;
  opacity: 0.7;
  margin-left: 2px;
}

/* ===================================
 * Page Content (About, etc.)
 * =================================== */
.page-content {
  max-width: var(--blog-content-max-width);
  margin: 0 auto;
}

/* ===================================
 * Friend Links Page
 * =================================== */
.links-page {
  max-width: var(--blog-content-max-width);
  margin: 0 auto;
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.links-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--md-sys-shape-corner-medium);
  border: 1px solid var(--md-sys-color-outline-variant);
  text-decoration: none;
  transition: background-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              border-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              transform var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.links-card:hover {
  background: var(--md-sys-color-surface-container);
  border-color: var(--md-sys-color-primary);
  transform: translateY(-2px);
  text-decoration: none;
}

.links-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.links-card__icon .md-icon {
  font-size: 22px;
}

.links-card__info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.links-card__name {
  font: var(--md-sys-typescale-title-small);
  color: var(--md-sys-color-on-surface);
}

.links-card__url {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===================================
 * Comments Section
 * =================================== */
.md-comments {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  max-width: 100%;
  min-width: 0;
  overflow: hidden;
}

.md-comments #giscus-container,
.md-comments .giscus {
  max-width: 100%;
  min-width: 0;
}

.md-comments #giscus-container > iframe,
.md-comments .giscus-frame {
  max-width: 100% !important;
  width: 100% !important;
}

.md-comments__title {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
  margin-bottom: 16px;
}

/* ===================================
 * Image Preview Overlay
 * =================================== */
.image-preview {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}

.image-preview img {
  max-width: 95%;
  max-height: 95%;
  object-fit: contain;
  border-radius: 0;
}

/* ===================================
 * Skip Navigation
 * =================================== */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 9999;
  padding: 8px 16px;
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border-radius: var(--md-sys-shape-corner-small);
  font: var(--md-sys-typescale-label-large);
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

/* ===================================
 * Responsive
 * =================================== */

/* Tablet */
@media (max-width: 1024px) {
  .main-content {
    padding-left: 20px;
    padding-right: 20px;
  }

  .home-content {
    gap: 24px;
  }

  .md-sidebar {
    width: 260px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --blog-header-height: 52px;
  }

  .md-header {
    padding: 0 16px;
  }

  .md-header__nav {
    display: none;
  }

  .md-header__menu-btn {
    display: flex;
  }

  .md-header__title {
    margin-left: 0;
  }

  .main-content {
    padding: calc(var(--blog-header-height) + 20px) 16px 40px;
  }

  /* Sidebar: full width below posts on mobile */
  .home-content {
    flex-direction: column;
  }

  .md-sidebar {
    width: 100%;
    position: static;
    margin-top: 24px;
  }

  /* Post card: stack cover image vertically on mobile */
  .post-card--has-cover {
    flex-direction: column;
    gap: 12px;
  }

  .post-card__cover-wrap {
    width: 100%;
    height: 180px;
  }

  /* Hero compact on mobile */
  .md-hero {
    padding: 28px 0 24px;
    margin-bottom: 16px;
  }

  .md-hero__title {
    font: var(--md-sys-typescale-display-small);
  }

  .md-hero__subtitle {
    font: var(--md-sys-typescale-title-medium);
  }

  /* Post card adjustments */
  .post-card {
    padding: 20px 0;
  }

  .post-card__excerpt {
    -webkit-line-clamp: 2;
  }

  /* Article page */
  .post-header {
    margin-bottom: 28px;
  }

  .post-header__title {
    font: var(--md-sys-typescale-display-small);
  }

  .post-header__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .md-pagination {
    gap: 4px;
  }

  .md-pagination__item {
    min-width: 36px;
    height: 36px;
    padding: 0 8px;
  }

  /* TOC FAB position */
  .md-toc-fab {
    right: 80px;
    bottom: 20px;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .md-hero__title {
    font: var(--md-sys-typescale-headline-large);
  }

  .md-hero__subtitle {
    font: var(--md-sys-typescale-title-small);
  }

  .post-header__title {
    font-size: 26px;
  }
}

/* ===================================
 * Reduced Motion
 * =================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}