/* ============================================================
   post.css
   Post page styles for Firefly Hexo theme
   ============================================================ */

/* Post container */
.post-container {
  padding-top: 1.5rem;
}

/* Post cover image */
.post-cover {
  border-radius: var(--radius-large);
  overflow: hidden;
  margin-bottom: 1.5rem;
}
.post-cover img {
  width: 100%;
  height: auto;
  display: block;
}

/* Post header */
.post-header {
  margin-bottom: 2rem;
}

/* Category breadcrumbs */
.post-meta-categories {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: 0.5rem;
}
.category-breadcrumb-item {
  padding: 0.2rem 0.65rem;
  background: var(--btn-regular-bg);
  color: var(--text-secondary);
  border-radius: var(--radius-full, 999px);
  font-size: 0.8125rem;
  transition: all var(--duration-fast);
  text-decoration: none;
}
.category-breadcrumb-item:hover {
  background: var(--primary);
  color: #fff;
}
.category-separator {
  color: var(--meta-divider);
  font-size: 0.875rem;
}

/* Category breadcrumbs (old class name support) */
.category-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: 0.5rem;
}
.category-breadcrumbs a {
  color: var(--text-secondary);
}
.category-breadcrumbs a:hover { color: var(--primary); }
.category-breadcrumbs .separator {
  color: var(--meta-divider);
}

/* Post title */
.post-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}
.post-title-custom {
  font-size: 2rem;
  font-weight: 800;
  margin: 1.5rem 0 1.25rem;
  border-left: 4px solid var(--primary);
  padding-left: 0.875rem;
  line-height: 1.35;
}
@media (max-width: 768px) {
  .post-title-custom {
    font-size: 1.5rem;
    padding-left: 0.625rem;
    border-left-width: 3px;
  }
}

/* Post header badges/pills — M3 assist chip style */
.post-header-badges-top,
.post-header-badges-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem;
  margin: 0.75rem 0;
}
.post-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.35rem 0.75rem;
  background: var(--md-sys-color-surface-variant);
  border: 1px solid var(--line-divider);
  border-radius: var(--md-shape-corner-full);
  font-size: 0.8125rem;
  color: var(--md-sys-color-on-surface-variant);
  transition:
    background-color var(--md-motion-duration-short) var(--md-motion-easing-standard),
    color var(--md-motion-duration-short) var(--md-motion-easing-standard),
    border-color var(--md-motion-duration-short) var(--md-motion-easing-standard);
}
.post-meta-badge:hover {
  background: var(--md-sys-color-primary-container);
  border-color: var(--primary);
  color: var(--md-sys-color-on-primary-container);
}
.post-meta-badge .material-symbols-outlined {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.875rem;
  transition: font-variation-settings var(--md-motion-duration-short) var(--md-motion-easing-standard);
}
.post-meta-badge:hover .material-symbols-outlined {
  font-variation-settings: 'FILL' 1, 'wght' 500, 'GRAD' 0, 'opsz' 24;
}
.taxonomy-path {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
}
.taxonomy-separator {
  color: var(--text-tertiary);
  margin: 0 0.375rem;
  font-size: 0.75rem;
  font-weight: bold;
}
.taxonomy-cat, .taxonomy-tag {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast, 0.2s);
}
.taxonomy-cat:hover, .taxonomy-tag:hover {
  color: var(--primary);
  text-decoration: underline;
}


/* Post meta in header */
.post-header-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-tertiary);
}
.post-header-meta time,
.post-header-meta .word-count,
.post-header-meta .reading-time {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.post-meta-top {
  margin-bottom: 1.25rem;
}

/* Post updated notice — M3 assist chip style */
.post-updated-note {
  display: flex;
  width: fit-content;
  align-items: center;
  gap: 0.375rem;
  padding: 0.35rem 0.75rem;
  background: var(--md-sys-color-surface-variant);
  border: 1px solid var(--line-divider);
  border-radius: var(--md-shape-corner-full);
  font-size: 0.8125rem;
  color: var(--md-sys-color-on-surface-variant);
  margin-top: 0.75rem;
  margin-bottom: 1.25rem;
  font-weight: 500;
  transition:
    background-color var(--md-motion-duration-short) var(--md-motion-easing-standard),
    color var(--md-motion-duration-short) var(--md-motion-easing-standard);
}
.post-updated-note .material-symbols-outlined {
  font-size: 1rem;
  color: var(--md-sys-color-on-surface-variant);
}

/* Post body */
.post-body {
  font-size: 1.125rem;
  line-height: 1.85;
  font-weight: 400;
}

/* Post footer */
.post-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line-divider);
}

/* Tags in post footer */
.post-meta-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.post-meta-tags i {
  color: var(--text-tertiary);
}
.post-tag-link {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  border-radius: var(--md-shape-corner-full);
  background: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid var(--line-divider);
  transition:
    background-color var(--md-motion-duration-short) var(--md-motion-easing-standard),
    color var(--md-motion-duration-short) var(--md-motion-easing-standard),
    border-color var(--md-motion-duration-short) var(--md-motion-easing-standard);
}
.post-tag-link:hover {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-color: var(--primary);
}

/* Categories at bottom */
.post-meta-categories-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.post-meta-categories-bottom i {
  color: var(--text-tertiary);
}
.post-category-link {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  border-radius: var(--md-shape-corner-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  transition:
    background-color var(--md-motion-duration-short) var(--md-motion-easing-standard),
    color var(--md-motion-duration-short) var(--md-motion-easing-standard);
}
.post-category-link:hover {
  filter: brightness(0.92);
}

/* Old tags class (backward compat) */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.post-tags a {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full, 999px);
  background: var(--btn-regular-bg);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  transition: all var(--duration-fast);
}
.post-tags a:hover {
  background: var(--btn-plain-bg-hover);
  color: var(--primary);
}

/* Copyright Box */
.post-copyright-box {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  background: var(--btn-regular-bg);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-medium);
  font-size: 0.875rem;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-fast);
}
.post-copyright-box:hover {
  box-shadow: var(--shadow-md);
  background: var(--btn-regular-bg-hover);
}
.copyright-header {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px dashed var(--line-divider);
  padding-bottom: 0.75rem;
}
.copyright-title {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1rem;
}
.copyright-link {
  color: var(--primary);
  text-decoration: none;
  word-break: break-all;
  font-size: 0.8125rem;
}
.copyright-link:hover {
  text-decoration: underline;
}
.copyright-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.copyright-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.copyright-meta-item .meta-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.copyright-meta-item .meta-value {
  font-weight: 600;
  color: var(--text-primary);
}
.copyright-meta-item .meta-value a {
  color: var(--primary);
  text-decoration: none;
}
.copyright-meta-item .meta-value a:hover {
  text-decoration: underline;
}

/* Post navigation (prev/next) */
.post-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 2rem 0;
}
.post-navigation a {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  border-radius: var(--md-shape-corner-medium);
  background: var(--card-bg);
  border: 1px solid var(--line-divider);
  transition:
    background-color var(--md-motion-duration-short) var(--md-motion-easing-standard),
    border-color var(--md-motion-duration-short) var(--md-motion-easing-standard);
}
.post-navigation a:hover {
  background: var(--md-sys-color-surface-variant);
  border-color: var(--primary);
}
.post-navigation a.prev { align-items: flex-start; text-align: left; }
.post-navigation a.next { align-items: flex-end; text-align: right; grid-column: 2; }
.post-navigation .nav-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-bottom: 0.25rem;
}
.post-navigation .nav-title {
  font-size: 0.9375rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* Share buttons */
.post-share {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1.5rem 0;
}
.post-share button, .post-share a {
  padding: 0.5rem;
  border: 1px solid var(--line-divider);
  border-radius: var(--radius-medium);
  background: var(--card-bg);
  cursor: pointer;
  transition: all var(--duration-fast);
  font-size: 1rem;
}
.post-share button:hover, .post-share a:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Last modified card — M3 tonal surface */
.post-last-modified {
  padding: 0.75rem 1rem;
  margin: 1.5rem 0;
  background: var(--md-sys-color-surface-variant);
  border-radius: var(--md-shape-corner-medium);
  border: 1px solid var(--line-divider);
  font-size: 0.875rem;
  color: var(--md-sys-color-on-surface-variant);
}
.dark .post-last-modified {
  background: var(--md-sys-color-surface-variant);
  border-color: var(--line-divider);
}

/* Card container for post content — M3 surface */
.post-content-card {
  background: var(--card-bg);
  border: 1px solid var(--line-divider);
  border-radius: var(--md-shape-corner-large);
  padding: 2rem 2.5rem;
  margin-bottom: 1.5rem;
  transition: border-color var(--md-motion-duration-short) var(--md-motion-easing-standard);
}
.post-content-card:hover {
  border-color: oklch(0.65 0.18 var(--hue) / 0.25);
}

@media (max-width: 768px) {
  .post-content-card {
    padding: 1.25rem 1rem;
    border-radius: var(--radius-medium, 12px);
  }
}