/* ============================================
   THEME ENHANCEMENTS CSS

   Hydejack & Halve-Z inspired components:
   - Year-based post grouping
   - Taxonomy grid
   - Post addons system
   - Compact list items
   - GitHub repo cards
   - Aspect ratio containers
   - Column system
   ============================================ */

/* --------------------------------------------------
   YEAR-BASED POST GROUPING
   -------------------------------------------------- */

.posts-by-year {
  max-width: var(--content-wide-max-width);
  margin: 0 auto;
}

.year-group {
  margin-bottom: var(--space-lg);
}

.year-heading {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-border);
  margin-bottom: var(--space-md);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
}

.year-heading .anchor-link {
  opacity: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: opacity var(--duration-fast);
}

.year-heading:hover .anchor-link {
  opacity: 1;
}

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

/* --------------------------------------------------
   COMPACT POST LIST ITEMS
   -------------------------------------------------- */

.post-list-compact {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.post-list-compact:last-child {
  border-bottom: none;
}

.post-list-compact__link {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  text-decoration: none;
  gap: var(--space-md);
  transition: color var(--duration-fast);
}

.post-list-compact__link:hover,
.post-list-compact__link:focus-visible {
  color: var(--color-primary);
}

.post-list-compact__link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.post-list-compact__link:hover .post-list-compact__title,
.post-list-compact__link:focus-visible .post-list-compact__title {
  color: var(--color-primary);
}

.post-list-compact__title {
  font-weight: 500;
  color: var(--color-text);
  font-size: var(--text-base);
  transition: color var(--duration-fast);
}

.post-list-compact__meta {
  display: flex;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.post-list-compact__meta time {
  font-variant-numeric: tabular-nums;
}

.post-list-compact__tags {
  display: flex;
  gap: var(--space-xs);
  list-style: none;
  padding: 0;
  margin: var(--space-xs) 0 0 0;
  font-size: var(--text-xs);
}

.post-list-compact__tags a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.post-list-compact__tags a:hover {
  color: var(--color-primary);
}

/* Mobile responsive */
@media (max-width: 600px) {
  .post-list-compact__link {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .post-list-compact__meta {
    font-size: var(--text-xs);
  }
}

/* --------------------------------------------------
   TAXONOMY GRID
   -------------------------------------------------- */

.taxonomy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.taxonomy-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  background: var(--color-bg);
  /* Allow glow to extend */
  position: relative;
  overflow: visible;
  /* Synchronized transition timing */
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
  will-change: transform, box-shadow;
}

/* Unified glow effect using pseudo-element */
.taxonomy-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: calc(var(--radius-md) + 1px);
  background: transparent;
  box-shadow: none;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
  pointer-events: none;
  z-index: -1;
}

.taxonomy-card:hover,
.taxonomy-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.taxonomy-card:hover::before,
.taxonomy-card:focus-within::before {
  opacity: 1;
  box-shadow:
    0 0 0 1px var(--color-primary),
    0 20px 40px -8px rgba(var(--shadow-color), var(--alpha-15)),
    0 8px 16px -4px rgba(var(--shadow-color), var(--alpha-10));
}

.taxonomy-card:focus-within {
  outline: 2px solid var(--color-link);
  outline-offset: 2px;
}

.taxonomy-card__name {
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.taxonomy-card__count {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

.taxonomy-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
  line-height: 1.5;
}

/* --------------------------------------------------
   POST ADDONS SYSTEM
   -------------------------------------------------- */

.post-addons {
  margin-top: var(--space-xxl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.addon {
  margin-bottom: var(--space-lg);
}

.addon-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

/* Author About Addon */
.author-card {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-md);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

.author-avatar {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
}

.author-info {
  flex: 1;
}

.author-name {
  margin: 0 0 var(--space-xs) 0;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}

.author-bio {
  margin: 0 0 var(--space-sm) 0;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.author-social {
  display: flex;
  gap: var(--space-sm);
  list-style: none;
  padding: 0;
  margin: 0;
}

.author-social a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--duration-fast);
}

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

/* Related Posts Addon */
.related-posts-addon {
  margin-bottom: var(--space-lg);
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
  list-style: none;
  padding: 0;
  margin: 0;
}

.related-post-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: visible;
  position: relative;
  /* Synchronized transition timing */
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
  will-change: transform, box-shadow;
}

/* Unified glow effect using pseudo-element */
.related-post-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: calc(var(--radius-md) + 1px);
  background: transparent;
  box-shadow: none;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
  pointer-events: none;
  z-index: -1;
}

.related-post-card:hover,
.related-post-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.related-post-card:hover::before,
.related-post-card:focus-within::before {
  opacity: 1;
  box-shadow:
    0 0 0 1px var(--color-primary),
    0 20px 40px -8px rgba(var(--shadow-color), var(--alpha-15)),
    0 8px 16px -4px rgba(var(--shadow-color), var(--alpha-10));
}

.related-post-card:focus-within {
  outline: 2px solid var(--color-link);
  outline-offset: 2px;
}

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

.related-post-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  isolation: isolate;
}

.related-post-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* Synchronized transition timing */
  transition: transform var(--duration-normal) var(--ease-out);
  will-change: transform;
}

/* Synchronized hover: image scales with container */
.related-post-card:hover .related-post-image img,
.related-post-card:focus-within .related-post-image img {
  transform: scale(1.05);
}

.related-post-content {
  padding: var(--space-md);
}

.related-post-title {
  font-size: var(--text-base);
  font-weight: 600;
  margin: 0 0 var(--space-xs) 0;
  color: var(--color-text);
}

.related-post-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-sm) 0;
  line-height: 1.5;
}

.related-post-date {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

/* --------------------------------------------------
   GITHUB REPOSITORY CARDS
   -------------------------------------------------- */

.github-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  background: var(--color-bg);
  margin: var(--space-lg) 0;
}

.github-card--error {
  background: var(--color-error-bg);
  border-color: var(--color-error);
}

.github-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.github-icon {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.github-card__name {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.github-card__name:hover {
  color: var(--color-primary);
}

.github-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-md) 0;
  line-height: 1.5;
}

.github-card__meta {
  display: flex;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.github-card__lang {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.lang-color {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
}

.github-card__hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin: var(--space-xs) 0 0 0;
}

/* --------------------------------------------------
   ASPECT RATIO CONTAINERS
   -------------------------------------------------- */

.aspect-ratio {
  position: relative;
  width: 100%;
  height: 0;
  overflow: hidden;
}

.aspect-ratio--16x9 { padding-top: 56.25%; }
.aspect-ratio--4x3 { padding-top: 75%; }
.aspect-ratio--1x1 { padding-top: 100%; }
.aspect-ratio--3x2 { padding-top: 66.66%; }
.aspect-ratio--21x9 { padding-top: 42.857%; }

.aspect-ratio > *,
.aspect-ratio > picture > * {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --------------------------------------------------
   COLUMN SYSTEM (Hydejack-inspired)
   -------------------------------------------------- */

.columns {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.column-1 { flex: 1 1 100%; }
.column-1-2 { flex: 1 1 calc(50% - var(--space-sm)); }
.column-1-3 { flex: 1 1 calc(33.333% - var(--space-md)); }
.column-2-3 { flex: 2 1 calc(66.666% - var(--space-sm)); }
.column-3-5 { flex: 3 1 60%; }
.column-2-5 { flex: 2 1 40%; }

@media (max-width: 768px) {
  .column-1-2,
  .column-1-3,
  .column-2-3,
  .column-3-5,
  .column-2-5 {
    flex: 1 1 100%;
  }
}

/* --------------------------------------------------
   DARK MODE ADJUSTMENTS
   -------------------------------------------------- */

[data-theme="dark"] .taxonomy-card,
[data-theme="dark"] .github-card,
[data-theme="dark"] .related-post-card,
.dark-mode .taxonomy-card,
.dark-mode .github-card,
.dark-mode .related-post-card {
  background: var(--color-bg-secondary);
}

[data-theme="dark"] .taxonomy-card:hover,
[data-theme="dark"] .taxonomy-card:focus-within,
[data-theme="dark"] .related-post-card:hover,
[data-theme="dark"] .related-post-card:focus-within,
.dark-mode .taxonomy-card:hover,
.dark-mode .taxonomy-card:focus-within,
.dark-mode .related-post-card:hover,
.dark-mode .related-post-card:focus-within {
  box-shadow: 0 4px 12px rgba(var(--shadow-color), var(--alpha-30));
}

[data-theme="dark"] .taxonomy-card:hover::before,
[data-theme="dark"] .taxonomy-card:focus-within::before,
[data-theme="dark"] .related-post-card:hover::before,
[data-theme="dark"] .related-post-card:focus-within::before,
.dark-mode .taxonomy-card:hover::before,
.dark-mode .taxonomy-card:focus-within::before,
.dark-mode .related-post-card:hover::before,
.dark-mode .related-post-card:focus-within::before {
  box-shadow:
    0 0 0 1px var(--color-primary),
    0 20px 40px -8px rgba(var(--shadow-color), var(--alpha-30)),
    0 8px 16px -4px rgba(var(--shadow-color), var(--alpha-20));
}