/* 1. Blog Semantic Tokens */
.blog-listing, .article-container {
  --blog-card-title: var(--fs-h3);
  --blog-body: 1.125rem;
  --blog-body-lh: 1.75;
  --blog-lead: 1.25rem;
  --blog-meta: var(--fs-caption);
  --blog-code: 0.875rem;
}

/* 2. Blog Search Input */
.blog-search {
  position: relative;
  width: 100%;
  margin-bottom: var(--sp-3);
}

.blog-search svg,
.blog-search .blog-search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  pointer-events: none;
}

.blog-search input,
.blog-search .blog-search-input {
  width: 100%;
  height: 46px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-soft);
  padding-left: 44px;
  padding-right: 44px;
  font-size: var(--fs-small);
  color: var(--text);
  outline: none;
  font-family: inherit;
  transition: border-color var(--fast) var(--ease), background var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}

.blog-search input:focus,
.blog-search .blog-search-input:focus {
  border-color: var(--border-strong);
  background: var(--surface-hover);
  box-shadow: var(--shadow-sm);
}

.blog-search-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: none;
  place-items: center;
  color: var(--text-muted);
  cursor: pointer;
  border: none;
  background: transparent;
  padding: 0;
  transition: color var(--fast) var(--ease), background var(--fast) var(--ease);
}

.blog-search-clear svg {
  width: 14px;
  height: 14px;
  position: static;
  transform: none;
  pointer-events: none;
}

.blog-search-clear:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.has-value .blog-search-clear {
  display: grid;
}

/* 3. Blog Filter Bar */
.blog-filters {
  display: flex;
  flex-direction: row;
  gap: var(--sp-2);
  overflow-x: auto;
  padding: var(--sp-3) 0;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.blog-filters::-webkit-scrollbar {
  display: none;
}

.pill.is-active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

/* 4. Blog Card */
.blog-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  overflow: hidden;
  transition: border-color var(--medium) var(--ease), background var(--medium) var(--ease), box-shadow var(--medium) var(--ease);
  height: 100%;
}

.blog-card:hover {
  border-color: var(--border-strong);
  background: var(--surface-raised);
  box-shadow: var(--shadow-md);
}

.blog-card-image {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}

.blog-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.blog-card-body {
  padding: var(--sp-4);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.blog-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--sp-1);
}

.blog-card-title {
  font-size: var(--fs-h3);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

.blog-card-desc {
  font-size: var(--fs-small);
  line-height: var(--lh-normal);
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

.blog-card-desc:empty {
  display: none;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-top: auto;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.blog-card-meta {
  font-size: var(--blog-meta);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

.blog-card-meta .sep::before {
  content: "·";
}

.blog-card-action {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--text);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-soft);
  transition: background var(--fast) var(--ease), border-color var(--fast) var(--ease), color var(--fast) var(--ease);
}

.blog-card:hover .blog-card-action {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

a.blog-card {
  text-decoration: none;
  color: inherit;
}

/* 5. Blog Grid */
.blog-grid {
  display: grid;
  gap: var(--sp-4);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 360px), 1fr));
}

@media (max-width: 640px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
}

/* 7. Loading Skeleton */
.blog-skeleton {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  overflow: hidden;
}

.skeleton-block {
  display: block;
  border-radius: 4px;
  background: var(--surface-hover);
}

.skeleton-image {
  aspect-ratio: 16/9;
}

.skeleton-line {
  height: 14px;
}

.skeleton-line--title {
  height: 20px;
}

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

.blog-skeleton .skeleton-block {
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface-hover) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
}

/* 8. Empty State */
.blog-empty {
  text-align: center;
  padding: var(--sp-8) var(--sp-4);
  max-width: 400px;
  margin-inline: auto;
}

.blog-empty-icon {
  width: 48px;
  height: 48px;
  margin-inline: auto;
  margin-bottom: var(--sp-3);
  color: var(--text-muted);
  opacity: 0.5;
}

.blog-empty-icon svg {
  width: 100%;
  height: 100%;
}

.blog-empty-title {
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
  color: var(--text);
  margin-bottom: var(--sp-2);
}

.blog-empty-desc {
  font-size: var(--fs-small);
  color: var(--text-muted);
  line-height: var(--lh-normal);
  margin-bottom: var(--sp-4);
}

/* 9. Error State */
.blog-error {
  text-align: center;
  padding: var(--sp-8) var(--sp-4);
  max-width: 400px;
  margin-inline: auto;
}

.blog-error-icon {
  width: 48px;
  height: 48px;
  margin-inline: auto;
  margin-bottom: var(--sp-3);
  color: #ef4444;
}

.blog-error-icon svg {
  width: 100%;
  height: 100%;
}

.blog-error-title {
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
  color: var(--text);
  margin-bottom: var(--sp-2);
}

.blog-error-desc {
  font-size: var(--fs-small);
  color: var(--text-muted);
  line-height: var(--lh-normal);
  margin-bottom: var(--sp-4);
}

/* 10. Callout Blocks */
.callout {
  border-left: 3px solid;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
}

.callout-label {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-small);
  margin-bottom: var(--sp-2);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
}

.callout-label svg, 
.callout-label .callout-icon {
  width: 16px;
  height: 16px;
}

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

.callout-note {
  border-color: #3b82f6;
  background: rgba(59, 130, 246, 0.08);
}
.callout-note .callout-label {
  color: #3b82f6;
}

.callout-tip {
  border-color: #22c55e;
  background: rgba(34, 197, 94, 0.08);
}
.callout-tip .callout-label {
  color: #22c55e;
}

.callout-warning {
  border-color: #f59e0b;
  background: rgba(245, 158, 11, 0.08);
}
.callout-warning .callout-label {
  color: #f59e0b;
}

.callout-important {
  border-color: #a855f7;
  background: rgba(168, 85, 247, 0.08);
}
.callout-important .callout-label {
  color: #a855f7;
}

.callout-caution {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
}
.callout-caution .callout-label {
  color: #ef4444;
}

/* 11. Article Table */
.article-table-wrap {
  overflow-x: auto;
  margin-bottom: 1.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-small);
}

.article-table th {
  background: var(--surface-hover);
  font-weight: var(--fw-semibold);
  text-align: left;
  padding: 10px 14px;
  border-bottom: 2px solid var(--border);
}

.article-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.article-table tbody tr:nth-child(even) {
  background: var(--bg-soft);
}

.article-table tbody tr:last-child td {
  border-bottom: none;
}

/* 12. Task List */
.task-list {
  list-style: none;
  padding-left: 0;
}

.task-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-2);
  padding-left: 0;
}

.task-list input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin-top: 0.3em;
  accent-color: var(--accent);
  flex-shrink: 0;
  pointer-events: none;
}

/* 13. Article Footnotes */
.article-footnotes {
  border-top: 1px solid var(--border);
  margin-top: var(--sp-6);
  padding-top: var(--sp-4);
}

.article-footnotes-title {
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--text-muted);
  margin-bottom: var(--sp-3);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
}

.article-footnotes ol {
  padding-left: 1.5rem;
  font-size: var(--fs-small);
  color: var(--text-muted);
  line-height: var(--lh-normal);
}

.footnote-ref {
  font-size: 0.75em;
  vertical-align: super;
  color: var(--accent);
  text-decoration: none;
  font-weight: var(--fw-semibold);
}

.footnote-ref:hover {
  text-decoration: underline;
}

/* 14. Article Table of Contents */
.article-toc {
  position: sticky;
  top: 120px;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
  width: 220px;
  padding-left: var(--sp-4);
  border-left: 1px solid var(--border);
}

.article-toc-title {
  font-size: var(--fs-label);
  font-weight: var(--fw-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  margin-bottom: var(--sp-3);
}

.article-toc-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.article-toc-link {
  display: block;
  font-size: var(--fs-caption);
  color: var(--text-muted);
  text-decoration: none;
  padding: 4px 0;
  line-height: var(--lh-snug);
  border-left: 2px solid transparent;
  padding-left: 12px;
  margin-left: -1px;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

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

.article-toc-link.is-active {
  color: var(--text);
  border-left-color: var(--accent);
}

.article-toc-link[data-level="3"] {
  padding-left: 24px;
}

.article-toc-link[data-level="4"] {
  padding-left: 36px;
}

@media (max-width: 1199px) {
  .article-toc {
    display: none;
  }
}

/* 15. Article Layout with TOC */
.article-with-toc {
  display: flex;
  gap: var(--sp-6);
  max-width: 1060px;
  margin-inline: auto;
  padding-inline: 20px;
}

.article-with-toc .article-container {
  flex: 1;
  min-width: 0;
}

@media (max-width: 1199px) {
  .article-with-toc {
    display: block;
  }
}

/* 16. Post Navigation */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
  margin-top: var(--sp-7);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--border);
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding: var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: border-color var(--fast) var(--ease), background var(--fast) var(--ease);
}

.post-nav-link:hover {
  border-color: var(--border-strong);
  background: var(--surface-hover);
}

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

.post-nav-label {
  font-size: var(--fs-label);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
}

.post-nav-title {
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 640px) {
  .post-nav {
    grid-template-columns: 1fr;
  }
}

/* 17. Highlight & Inline Elements */
mark, .highlight {
  background: rgba(250, 204, 21, 0.25);
  color: inherit;
  padding: 1px 4px;
  border-radius: 2px;
}

kbd {
  display: inline-block;
  padding: 2px 6px;
  font-size: 0.85em;
  font-family: var(--font-mono);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: 0 1px 0 var(--border);
  line-height: 1.4;
}

/* Article Cover Image */
.article-cover {
  margin: 0 0 var(--sp-5);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
}

.article-cover img {
  display: block;
  width: 100%;
  height: auto;
}

/* Metadata Separator */
.sep::before {
  content: "\00b7";
}

/* 18. Admin Dashboard */
.admin-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: var(--fs-small);
}

.admin-table th {
  padding: 14px 16px;
  background: var(--surface-raised);
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-size: var(--fs-label);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  white-space: nowrap;
}

.admin-table td {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-table tr:hover td {
  background: var(--surface-hover);
}

.admin-post-title {
  font-weight: var(--fw-semibold);
  color: var(--text);
  text-decoration: none;
  font-size: var(--fs-body);
  display: block;
  transition: color var(--fast) var(--ease);
}

.admin-post-title:hover {
  color: var(--accent);
}

.admin-post-slug {
  font-size: var(--fs-caption);
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 3px;
}

.admin-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: flex-end;
  white-space: nowrap;
}

.admin-status-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: var(--fs-label);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  white-space: nowrap;
}

.admin-status-badge--draft {
  background: rgba(245, 158, 11, 0.12);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.admin-status-badge--published {
  background: rgba(34, 197, 94, 0.12);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.3);
}