/* expero — editorial systems theme for Hexo Fluid */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

/* ═══════════════════════════════════════════
   0. FONTS
   ═══════════════════════════════════════════ */
:root {
  --ex-sans: 'IBM Plex Sans', 'Noto Sans SC', 'PingFang SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --ex-mono: 'IBM Plex Mono', 'JetBrains Mono', 'SFMono-Regular', 'Cascadia Code', monospace;
}


/* ═══════════════════════════════════════════
   1. DESIGN TOKENS
   ═══════════════════════════════════════════ */
:root {
  --ex-accent: #0f766e;
  --ex-accent-dim: #14b8a6;
  --ex-accent-bg: rgba(15, 118, 110, .09);
  --ex-accent-line: rgba(15, 118, 110, .2);
  --ex-signal: #b45309;
  --ex-ink: #111827;
  --ex-text: #334155;
  --ex-muted: #5f6b7a;
  --ex-faint: #94a3b8;
  --ex-border: rgba(148, 163, 184, .28);
  --ex-surface: rgba(255, 253, 248, .84);
  --ex-surface-strong: #fffdfa;
  --ex-bg: #f3ede3;
  --ex-code-bg: #f6f0e6;
  --ex-r-sm: 12px;
  --ex-r: 24px;
  --ex-r-lg: 32px;
  --ex-shadow-sm: 0 12px 30px rgba(15, 23, 42, .05);
  --ex-shadow-md: 0 26px 60px rgba(15, 23, 42, .08);
}

[data-user-color-scheme="dark"] {
  --ex-accent: #2dd4bf;
  --ex-accent-dim: #5eead4;
  --ex-accent-bg: rgba(45, 212, 191, .12);
  --ex-accent-line: rgba(45, 212, 191, .22);
  --ex-signal: #f59e0b;
  --ex-ink: #f8fafc;
  --ex-text: #d6deea;
  --ex-muted: #97a6ba;
  --ex-faint: #64748b;
  --ex-border: rgba(71, 85, 105, .46);
  --ex-surface: rgba(11, 19, 30, .84);
  --ex-surface-strong: #0d1724;
  --ex-bg: #08111b;
  --ex-code-bg: #101b28;
  --ex-shadow-sm: 0 16px 36px rgba(2, 6, 23, .32);
  --ex-shadow-md: 0 26px 60px rgba(2, 6, 23, .48);
}


/* ═══════════════════════════════════════════
   2. BASE
   ═══════════════════════════════════════════ */
html,
body {
  background-color: var(--ex-bg);
}

body {
  position: relative;
  min-height: 100vh;
  isolation: isolate;
  font-family: var(--ex-sans) !important;
  color: var(--ex-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(ellipse 62% 46% at 6% -4%, rgba(180, 83, 9, .12) 0%, transparent 68%),
    radial-gradient(ellipse 58% 42% at 100% 0%, rgba(15, 118, 110, .12) 0%, transparent 66%);
  background-repeat: no-repeat;
}

[data-user-color-scheme="dark"] html,
[data-user-color-scheme="dark"] body {
  background-color: var(--ex-bg);
}

[data-user-color-scheme="dark"] body {
}

[data-user-color-scheme="dark"] body::before {
  background-image:
    radial-gradient(ellipse 62% 46% at 6% -4%, rgba(45, 212, 191, .12) 0%, transparent 68%),
    radial-gradient(ellipse 56% 40% at 100% 0%, rgba(56, 189, 248, .10) 0%, transparent 64%);
}

::selection { background: rgba(15, 118, 110, .18); }
[data-user-color-scheme="dark"] ::selection { background: rgba(45, 212, 191, .24); }


/* ═══════════════════════════════════════════
   3. SCROLLBAR
   ═══════════════════════════════════════════ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, .56);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover { background: var(--ex-faint); }


/* ═══════════════════════════════════════════
   4. NAVBAR
   ═══════════════════════════════════════════ */
.navbar {
  background: rgba(255, 253, 248, .78) !important;
  border-bottom: 1px solid var(--ex-border) !important;
  backdrop-filter: saturate(140%) blur(16px) !important;
  -webkit-backdrop-filter: saturate(140%) blur(16px) !important;
  box-shadow: none !important;
}
[data-user-color-scheme="dark"] .navbar {
  background: rgba(8, 17, 27, .82) !important;
}

.navbar .container {
  max-width: 1200px;
}

.navbar-inner .navbar-brand,
.navbar-brand {
  font-family: var(--ex-mono) !important;
  font-weight: 600 !important;
  font-size: .92rem !important;
  color: var(--ex-ink) !important;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.nav-item .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--ex-mono) !important;
  font-weight: 500 !important;
  font-size: .76rem !important;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ex-muted) !important;
  transition: color .18s ease, opacity .18s ease !important;
}
.nav-item .nav-link:hover,
.nav-item .nav-link.active {
  color: var(--ex-accent) !important;
}

.nav-item .nav-link i {
  font-size: .9rem;
}

.navbar-toggler {
  border-color: var(--ex-border) !important;
  background: var(--ex-surface-strong);
  border-radius: 999px;
}


/* ═══════════════════════════════════════════
   5. BANNER — hidden
   ═══════════════════════════════════════════ */
.banner { display: none !important; }


/* ═══════════════════════════════════════════
   6. BOARD / LAYOUT
   ═══════════════════════════════════════════ */
#board-ctn {
  max-width: 1220px;
}

#board {
  border-radius: 0;
  background: transparent !important;
  margin-top: 88px !important;
  padding: 0 0 40px;
  box-shadow: none !important;
}
#board::before { display: none; }

body:has(.home-feed) #board {
  padding-bottom: 16px;
}

#board:has(.about-avatar),
#board:has(.post-content),
#board:has(.tagcloud),
#board:has(.category-list),
#board:has(.list-group) {
  background: var(--ex-surface-strong) !important;
  border: 1px solid var(--ex-border);
  border-radius: var(--ex-r-lg);
  box-shadow: var(--ex-shadow-sm);
  overflow: hidden;
}

#board:has(.about-avatar) {
  padding-top: 148px;
}

#board:has(.tagcloud),
#board:has(.category-list),
#board:has(.list-group) {
  padding: 34px 36px 40px;
}

.container-fluid.nopadding-x,
.row.nomargin-x {
  background: transparent !important;
}


/* ═══════════════════════════════════════════
   7. HOME INTRO + INDEX CARDS
   ═══════════════════════════════════════════ */
.home-empty,
.ex-index-card {
  border: 1px solid var(--ex-border);
  border-radius: var(--ex-r);
  background: var(--ex-surface);
  box-shadow: var(--ex-shadow-sm);
}

.home-feed__eyebrow,
.home-empty__eyebrow {
  margin: 0 0 12px;
  font-family: var(--ex-mono);
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ex-signal);
}

.ex-pill-link,
.home-feed__archive {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--ex-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, .72);
  color: var(--ex-ink) !important;
  font-family: var(--ex-mono);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  text-decoration: none !important;
  transition: border-color .18s ease, color .18s ease, transform .18s ease, background .18s ease;
}

.ex-pill-link:hover,
.home-feed__archive:hover {
  border-color: var(--ex-accent);
  color: var(--ex-accent) !important;
  transform: translateY(-1px);
}

.home-topic,
.post-hero__chip,
.post-hero__taxonomy .category-chain-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: 1px solid var(--ex-accent-line);
  border-radius: 999px;
  background: var(--ex-accent-bg);
  color: var(--ex-accent) !important;
  font-family: var(--ex-mono);
  font-size: .78rem;
  font-weight: 500;
  line-height: 1;
  text-decoration: none !important;
}

.home-empty__copy {
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ex-muted);
}

.home-feed__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.home-feed__title,
.home-empty__title {
  margin: 0;
  color: var(--ex-ink);
  font-size: clamp(1.45rem, 3vw, 2.05rem);
  line-height: 1.08;
  letter-spacing: -.04em;
}

.home-empty {
  padding: 28px 30px;
}

.ex-index-card {
  margin-bottom: 18px;
  overflow: hidden;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease !important;
}

.ex-index-card:hover {
  border-color: var(--ex-accent-line) !important;
  transform: translateY(-2px);
  box-shadow: var(--ex-shadow-md);
}

.ex-index-card__media {
  padding: 0 !important;
}

.ex-index-card__media a {
  display: block;
  height: 100%;
}

.index-card .index-img img {
  width: 100%;
  height: 100%;
  min-height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 0;
  border-radius: 0;
}

.ex-index-card__body {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 30px !important;
}

.ex-index-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--ex-mono);
  font-size: .78rem;
  letter-spacing: .03em;
  color: var(--ex-muted);
}

.ex-index-card__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.ex-index-card__meta-item--category .category-chain-item {
  color: var(--ex-muted) !important;
  font-size: .78rem;
  font-weight: 500;
}

.ex-index-card__title {
  margin: 0;
}

.ex-index-card__title a {
  color: var(--ex-ink) !important;
  font-size: clamp(1.55rem, 2.4vw, 2rem);
  line-height: 1.08;
  letter-spacing: -.04em;
}

.index-pin {
  color: var(--ex-signal) !important;
}

.ex-index-card__excerpt {
  display: block;
  color: var(--ex-text) !important;
  font-size: 1rem;
  line-height: 1.8;
  text-decoration: none !important;
}

.ex-index-card__excerpt div {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.ex-index-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 4px;
}

.ex-index-card__tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  min-height: 28px;
  color: var(--ex-faint);
  font-family: var(--ex-mono);
  font-size: .78rem;
}

.ex-index-card__tags a {
  color: var(--ex-muted) !important;
  text-decoration: none !important;
}

.ex-index-card__tags a:hover {
  color: var(--ex-accent) !important;
}

.ex-index-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ex-accent) !important;
  font-family: var(--ex-mono);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  text-decoration: none !important;
}

[data-user-color-scheme="dark"] .ex-pill-link,
[data-user-color-scheme="dark"] .home-feed__archive,
[data-user-color-scheme="dark"] .ex-footer__social a,
[data-user-color-scheme="dark"] .about-overview__identity,
[data-user-color-scheme="dark"] .about-overview__focus,
[data-user-color-scheme="dark"] .post-content .post-meta,
[data-user-color-scheme="dark"] .post-prevnext article a {
  background: rgba(15, 23, 42, .42);
}


/* ═══════════════════════════════════════════
   8. TYPOGRAPHY
   ═══════════════════════════════════════════ */
.markdown-body {
  font-family: var(--ex-sans) !important;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ex-text);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  color: var(--ex-ink);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-top: 2.2em;
  margin-bottom: .6em;
  line-height: 1.3;
}

.markdown-body h1 { font-size: 1.8em; }
.markdown-body h2 { font-size: 1.35em; }
.markdown-body h3 { font-size: 1.12em; }

.markdown-body h2 {
  padding-bottom: .35em;
  border-bottom: 1px solid var(--ex-border);
}

.markdown-body p { margin-bottom: 1.2em; }

.markdown-body strong {
  color: var(--ex-ink);
  font-weight: 600;
}

.markdown-body hr {
  border: none;
  height: 1px;
  background: var(--ex-border);
  margin: 2.5em 0;
}

.markdown-body ul,
.markdown-body ol { padding-left: 1.5em; }
.markdown-body li { margin-bottom: .35em; }
.markdown-body li::marker { color: var(--ex-accent); }


/* ═══════════════════════════════════════════
   9. LINKS
   ═══════════════════════════════════════════ */
#board .post-content a {
  color: var(--ex-accent) !important;
  text-decoration: underline !important;
  text-underline-offset: 3px;
  text-decoration-color: var(--ex-accent-line) !important;
  transition: text-decoration-color .15s ease;
}
#board .post-content a:hover {
  text-decoration-color: var(--ex-accent) !important;
}
[data-user-color-scheme="dark"] #board .post-content a {
  text-decoration-color: var(--ex-accent-line) !important;
}
[data-user-color-scheme="dark"] #board .post-content a:hover {
  text-decoration-color: var(--ex-accent) !important;
}


/* ═══════════════════════════════════════════
   10. CODE BLOCKS
   ═══════════════════════════════════════════ */
figure.highlight,
.markdown-body > pre,
.markdown-body pre[class*="language-"] {
  margin: 1.4rem 0;
  border-radius: 18px !important;
  border: 1px solid var(--ex-border) !important;
  background: var(--ex-code-bg) !important;
  box-shadow: none !important;
  font-family: var(--ex-mono) !important;
  font-size: .93rem !important;
  line-height: 1.7 !important;
  overflow: hidden;
}

figure.highlight table {
  width: 100% !important;
  margin: 0 !important;
  border-collapse: collapse;
}

figure.highlight td,
figure.highlight td.gutter,
figure.highlight td.code {
  border: 0 !important;
  background: transparent !important;
}

figure.highlight pre,
.markdown-body > pre,
.markdown-body pre[class*="language-"] {
  margin: 0 !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  font-family: inherit !important;
  font-size: inherit !important;
  line-height: inherit !important;
}

figure.highlight td.gutter {
  width: auto;
  min-width: 2rem;
  white-space: nowrap;
}

figure.highlight .gutter pre {
  padding: 1rem .35rem 1rem .22rem !important;
  border-right: 1px solid var(--ex-border) !important;
  color: var(--ex-faint) !important;
  font-size: .76rem !important;
  text-align: right;
  background: rgba(255, 255, 255, .3) !important;
}

figure.highlight td.code > pre,
.markdown-body > pre,
.markdown-body pre[class*="language-"] {
  padding: 1rem .95rem 1rem .55rem !important;
  overflow-x: auto;
}

figure.highlight td.code > pre code,
.markdown-body > pre code,
.markdown-body pre[class*="language-"] code {
  display: block;
  white-space: pre;
  min-width: 100%;
}

.markdown-body figure.highlight .hljs,
.markdown-body > pre .hljs,
.markdown-body pre[class*="language-"] .hljs {
  background: transparent !important;
}

/* Reading-first posts: line numbers add noise and waste width. */
.post-content figure.highlight table,
.post-content figure.highlight tbody,
.post-content figure.highlight tr,
.post-content figure.highlight td.code {
  display: block !important;
  width: 100% !important;
}

.post-content figure.highlight td.gutter,
.post-content figure.highlight .gutter {
  display: none !important;
}

.post-content figure.highlight td.code,
.post-content figure.highlight td.code > pre {
  width: 100% !important;
}

.post-content figure.highlight td.code > pre {
  padding-left: .85rem !important;
  padding-right: .85rem !important;
}

.post-content figure.highlight td.code > pre code,
.post-content figure.highlight td.code > pre code.hljs {
  display: block !important;
  width: 100% !important;
  min-width: 0 !important;
  background: transparent !important;
}

figure.highlight .code-lang {
  font-family: var(--ex-mono) !important;
  font-size: .65em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  opacity: .35;
}

/* inline code */
.markdown-body code:not([class*="language-"]):not(.hljs) {
  font-family: var(--ex-mono) !important;
  background: var(--ex-accent-bg);
  color: var(--ex-accent);
  padding: 2px 6px;
  border-radius: 8px;
  font-size: .85em;
  font-weight: 500;
}
[data-user-color-scheme="dark"] .markdown-body code:not([class*="language-"]):not(.hljs) {
  background: var(--ex-accent-bg);
  color: var(--ex-accent-dim);
}

.markdown-body .mermaid {
  margin: 1.5rem 0;
  padding: 1rem 1.15rem;
  border: 1px solid var(--ex-border);
  border-radius: var(--ex-r);
  background: var(--ex-surface);
  overflow-x: auto;
  text-align: center;
  box-shadow: var(--ex-shadow-sm);
}

.markdown-body .mermaid svg,
.markdown-body img[src^="data:image/svg+xml"],
.markdown-body img[src*="/plantuml/svg/"] {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

[data-user-color-scheme="dark"] .markdown-body .mermaid {
  background: var(--ex-surface-strong);
}


/* ═══════════════════════════════════════════
   11. BLOCKQUOTE
   ═══════════════════════════════════════════ */
.markdown-body blockquote {
  border-left: 3px solid var(--ex-accent);
  background: var(--ex-accent-bg);
  padding: 12px 16px;
  margin: 1.5em 0;
  border-radius: 0 var(--ex-r) var(--ex-r) 0;
  color: var(--ex-text);
}
.markdown-body blockquote p:last-child { margin-bottom: 0; }

[data-user-color-scheme="dark"] .markdown-body blockquote {
  border-left-color: var(--ex-accent);
  background: var(--ex-accent-bg);
}


/* ═══════════════════════════════════════════
   12. TABLES
   ═══════════════════════════════════════════ */
.markdown-body table {
  border-collapse: collapse;
  width: 100%;
  font-size: .92em;
  border: 1px solid var(--ex-border);
}
.markdown-body table thead th {
  font-family: var(--ex-mono) !important;
  background: var(--ex-bg);
  font-weight: 600;
  font-size: .8em;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--ex-muted);
  padding: 10px 14px;
  border-bottom: 1px solid var(--ex-border);
}
.markdown-body table tbody td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--ex-border);
}
[data-user-color-scheme="dark"] .markdown-body table thead th {
  background: var(--ex-code-bg);
}


/* ═══════════════════════════════════════════
   13. IMAGES
   ═══════════════════════════════════════════ */
.markdown-body img {
  border-radius: var(--ex-r);
  border: 1px solid var(--ex-border);
}

.image-caption {
  text-align: center;
  font-family: var(--ex-mono);
  font-size: .78em;
  color: var(--ex-faint);
  margin-top: 8px;
}


/* ═══════════════════════════════════════════
   14. NOTE BOXES — terminal style
   ═══════════════════════════════════════════ */
.note {
  background: var(--ex-code-bg) !important;
  border-left: 3px solid var(--ex-accent) !important;
  border-radius: 0 var(--ex-r-sm) var(--ex-r-sm) 0 !important;
  color: var(--ex-text) !important;
  font-size: .93em;
}
[data-user-color-scheme="dark"] .note {
  background: var(--ex-code-bg) !important;
}


/* ═══════════════════════════════════════════
   15. TOC SIDEBAR
   ═══════════════════════════════════════════ */
#toc {
  position: sticky;
  top: 88px;
  margin-top: 0;
  padding: 18px 18px 16px;
  border: 1px solid var(--ex-border);
  border-radius: 20px;
  background: var(--ex-surface);
  box-shadow: var(--ex-shadow-sm);
  visibility: hidden;
}

.toc-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--ex-mono);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ex-signal);
}

.toc-body {
  max-height: calc(100vh - 170px);
  overflow: auto;
  padding-right: 4px;
}

.tocbot-list a {
  font-family: var(--ex-mono) !important;
  font-size: .76rem !important;
  color: var(--ex-faint) !important;
  letter-spacing: .01em;
  line-height: 1.55;
  transition: color .15s ease;
}
.tocbot-list a:hover {
  color: var(--ex-ink) !important;
}
.tocbot-active-link {
  color: var(--ex-accent) !important;
  font-weight: 600 !important;
}
[data-user-color-scheme="dark"] .tocbot-active-link {
  color: var(--ex-accent) !important;
}


/* ═══════════════════════════════════════════
   16. TAGS & CATEGORIES
   ═══════════════════════════════════════════ */
.tagcloud a,
.tag-plugin-list a,
.category-list a {
  font-family: var(--ex-mono) !important;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.tagcloud a:hover,
.tag-plugin-list a:hover,
.category-list a:hover {
  color: var(--ex-accent) !important;
}


/* ═══════════════════════════════════════════
   17. COPYRIGHT BOX
   ═══════════════════════════════════════════ */
.post-copyright {
  border-radius: 20px !important;
  border: 1px solid var(--ex-border) !important;
  border-left: 3px solid var(--ex-accent) !important;
  background: var(--ex-code-bg) !important;
  padding: 18px 20px !important;
}
[data-user-color-scheme="dark"] .post-copyright {
  background: var(--ex-code-bg) !important;
  border-color: var(--ex-border) !important;
  border-left-color: var(--ex-accent) !important;
}
.post-copyright .post-copyright-info {
  font-family: var(--ex-mono);
  font-size: .8em;
  line-height: 1.8;
}
.post-copyright .post-copyright-info a {
  color: var(--ex-accent) !important;
}


/* ═══════════════════════════════════════════
   18. PAGINATION
   ═══════════════════════════════════════════ */
.pagination .page-item .page-link {
  font-family: var(--ex-mono) !important;
  border-radius: 999px !important;
  border: 1px solid var(--ex-border);
  margin: 0 4px;
  min-width: 42px;
  font-weight: 500;
  font-size: .85em;
  transition: all .15s ease;
}
.pagination .page-item .page-link:hover {
  background: var(--ex-accent-bg);
  border-color: var(--ex-accent);
  color: var(--ex-accent);
}
.pagination .page-item.active .page-link {
  background: var(--ex-accent) !important;
  border-color: var(--ex-accent) !important;
  color: #fff !important;
}
[data-user-color-scheme="dark"] .pagination .page-item.active .page-link {
  background: var(--ex-accent) !important;
  border-color: var(--ex-accent) !important;
  color: #0a0a0f !important;
}


/* ═══════════════════════════════════════════
   19. PREV / NEXT
   ═══════════════════════════════════════════ */
.post-prevnext {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 16px;
}

.post-prevnext article {
  flex: 0 0 calc(50% - 8px);
  max-width: calc(50% - 8px);
  min-width: 0;
  padding: 0;
}

.post-prevnext article a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  min-height: 88px;
  padding: 18px 20px;
  border: 1px solid var(--ex-border);
  border-radius: 20px;
  background: var(--ex-surface);
  color: var(--ex-ink) !important;
  text-decoration: none !important;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}

.post-prevnext article a:hover {
  border-color: var(--ex-accent-line);
  transform: translateY(-1px);
  box-shadow: var(--ex-shadow-sm);
}

.post-prevnext .post-title,
.post-prevnext .hidden-mobile,
.post-prevnext .visible-mobile {
  font-weight: 500;
}

.post-prevnext a:hover .post-title,
.post-prevnext a:hover .hidden-mobile,
.post-prevnext a:hover .visible-mobile {
  color: var(--ex-accent) !important;
}


/* ═══════════════════════════════════════════
   20. WALINE COMMENTS
   ═══════════════════════════════════════════ */
.wl-editor { border-radius: var(--ex-r) !important; }
.wl-card {
  border-radius: 20px !important;
  border-color: var(--ex-border) !important;
  background: var(--ex-surface) !important;
}
.wl-btn {
  border-radius: 999px !important;
  font-family: var(--ex-mono) !important;
}


/* ═══════════════════════════════════════════
   21. FOOTER
   ═══════════════════════════════════════════ */
footer {
  background: transparent !important;
  padding: 56px 0 44px;
  font-family: var(--ex-mono);
  font-size: .78em;
  color: var(--ex-faint);
  letter-spacing: .03em;
  overflow: visible;
}

body:has(.home-feed) footer {
  padding-top: 28px;
}

.footer-inner,
.ex-footer {
  display: grid;
  gap: 18px;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding-top: 0;
  overflow: visible;
}

.ex-footer__main {
  display: grid;
  justify-items: center;
  gap: 16px;
  text-align: center;
  overflow: visible;
}

.ex-footer__copyright {
  margin: 0;
  color: var(--ex-muted);
  font-size: .94rem;
  line-height: 1.7;
}

.ex-footer__social {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  overflow: visible;
}

.ex-footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 40px;
  height: 40px;
  border: 1px solid var(--ex-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, .62);
  color: var(--ex-faint) !important;
  text-decoration: none !important;
  transition: border-color .18s ease, color .18s ease, transform .18s ease, background .18s ease;
}

.ex-footer__social a:hover {
  border-color: var(--ex-accent);
  color: var(--ex-accent) !important;
  transform: translateY(-1px);
}

.ex-footer__social i,
.ex-footer__social .ex-social-icon {
  font-size: 1rem;
}

.ex-footer__extra {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--ex-border);
  color: var(--ex-faint);
  font-size: .74rem;
}

.ex-footer__extra .statistics,
.ex-footer__extra .beian {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
}

footer a:hover { color: var(--ex-accent) !important; }


/* ═══════════════════════════════════════════
   22. ABOUT PAGE
   ═══════════════════════════════════════════ */
.about-overview {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(300px, .95fr);
  gap: 24px;
  margin: 0 auto 28px;
}

.about-overview__identity,
.about-overview__focus {
  border: 1px solid var(--ex-border);
  border-radius: var(--ex-r);
  background: var(--ex-surface);
  box-shadow: var(--ex-shadow-sm);
}

.about-overview__identity {
  padding: 34px 38px;
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, .10), transparent 34%),
    radial-gradient(circle at bottom right, rgba(180, 83, 9, .10), transparent 26%),
    var(--ex-surface-strong);
}

.about-overview__eyebrow,
.about-overview__panel-label {
  margin: 0 0 12px;
  font-family: var(--ex-mono);
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ex-signal);
}

.about-overview__title {
  max-width: 12ch;
  margin: 0;
  color: var(--ex-ink);
  font-size: clamp(2.3rem, 5vw, 4rem);
  line-height: .98;
  letter-spacing: -.05em;
}

.about-overview__lead {
  max-width: 56ch;
  margin: 18px 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ex-muted);
}

.about-overview__profile {
  display: grid;
  gap: 0;
  max-width: 56ch;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--ex-border);
}

.about-overview__social {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  overflow: visible;
}

.about-overview__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  color: var(--ex-faint) !important;
  transition: color .15s ease, transform .15s ease;
}

.about-overview__social a:hover {
  color: var(--ex-accent) !important;
  transform: translateY(-1px);
}

.about-overview__social i,
.about-overview__social .ex-social-icon {
  font-size: 1.42rem;
}

.ex-social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.ex-social-icon svg {
  display: block;
  width: 1em;
  height: 1em;
  fill: currentColor;
}

.ex-footer__social [class*='hint--'][aria-label]::before,
.ex-footer__social [class*='hint--'][aria-label]::after,
.about-overview__social [class*='hint--'][aria-label]::before,
.about-overview__social [class*='hint--'][aria-label]::after {
  z-index: 120;
}

.about-overview__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.about-overview__focus {
  padding: 28px 28px 26px;
}

.about-overview__topics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.about-overview__copy {
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ex-muted);
}

.about-avatar img {
  width: 132px;
  height: 132px;
  border-radius: 50% !important;
  border: 3px solid var(--ex-accent) !important;
  box-shadow: 0 0 0 4px var(--ex-accent-bg);
}

.about-content {
  margin-top: 28px !important;
}


/* ═══════════════════════════════════════════
   23. ARCHIVE PAGE
   ═══════════════════════════════════════════ */
.list-group-item {
  font-family: var(--ex-mono) !important;
  font-size: .88em;
  transition: background .15s ease !important;
}
.list-group-item:hover {
  background: var(--ex-accent-bg) !important;
}
[data-user-color-scheme="dark"] .list-group-item:hover {
  background: var(--ex-accent-bg) !important;
}


/* ═══════════════════════════════════════════
   24. SEARCH
   ═══════════════════════════════════════════ */
.search-input {
  font-family: var(--ex-mono) !important;
  border-radius: var(--ex-r) !important;
  border: 1px solid var(--ex-border) !important;
}
.search-input:focus {
  border-color: var(--ex-accent) !important;
  box-shadow: 0 0 0 3px var(--ex-accent-bg) !important;
}


/* ═══════════════════════════════════════════
   25. 404
   ═══════════════════════════════════════════ */
.error-content h2 {
  font-family: var(--ex-mono);
  color: var(--ex-ink);
}
.error-content a { color: var(--ex-accent) !important; }


/* ═══════════════════════════════════════════
   26. SCROLL BUTTONS
   ═══════════════════════════════════════════ */
.scroll-top-arrow {
  background: var(--ex-surface) !important;
  border: 1px solid var(--ex-border) !important;
  border-radius: 999px !important;
  color: var(--ex-muted) !important;
  box-shadow: none !important;
}
.scroll-top-arrow:hover {
  border-color: var(--ex-accent) !important;
  color: var(--ex-accent) !important;
}


/* ═══════════════════════════════════════════
   27. POST HEADER (title + meta)
   ═══════════════════════════════════════════ */
.post-content {
  max-width: 780px;
  padding: 0 40px 16px;
}

.post-hero {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--ex-border);
  margin-bottom: 32px;
}

#seo-header {
  display: block !important;
  margin: 0;
  border: 0;
  color: var(--ex-ink);
  font-size: clamp(1.9rem, 3.8vw, 3.05rem);
  line-height: 1.02;
  letter-spacing: -.06em;
}

.post-hero__meta {
  margin-top: 22px;
}

.post-hero__meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

.post-content .post-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--ex-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, .66);
  font-family: var(--ex-mono) !important;
  font-size: .8em !important;
  color: var(--ex-muted) !important;
}
.post-content .post-meta a {
  color: var(--ex-accent) !important;
}

#updated-time {
  margin-top: 18px;
}

.markdown-body {
  max-width: 68ch;
}

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

.post-content .markdown-body > h1:first-child {
  display: none;
}

.post-content .markdown-body > h1:first-child + * {
  margin-top: 0;
}

.post-content hr {
  margin: 2.75rem 0;
}

.post-taxonomy {
  display: grid;
  gap: 18px;
  margin-top: 32px;
}

.post-taxonomy__group {
  display: grid;
  gap: 10px;
}

.post-taxonomy__label {
  font-family: var(--ex-mono);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ex-faint);
}

.post-taxonomy__content,
.post-taxonomy__content .category-chains {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.post-taxonomy__content--categories .category-chain {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.post-taxonomy__content--categories .category-chain span {
  color: var(--ex-faint);
  font-family: var(--ex-mono);
  font-size: .74rem;
}

.post-taxonomy__content--categories .category-chain-item {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--ex-border);
  border-radius: 12px;
  background: var(--ex-surface);
  color: var(--ex-ink) !important;
  font-family: var(--ex-mono);
  font-size: .8rem;
  text-decoration: none !important;
  transition: border-color .18s ease, color .18s ease, background .18s ease, box-shadow .18s ease;
}

.post-taxonomy__content--categories .category-chain-item:hover,
.post-taxonomy__tag:hover {
  border-color: var(--ex-accent-line);
  color: var(--ex-accent) !important;
  background: var(--ex-surface);
  box-shadow: var(--ex-shadow-sm);
}

.post-taxonomy__content--tags {
  gap: 12px;
}

.post-taxonomy__tag {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--ex-border);
  border-radius: 12px;
  background: var(--ex-surface);
  color: var(--ex-muted) !important;
  font-family: var(--ex-mono);
  font-size: .8rem;
  text-decoration: none !important;
  transition: border-color .18s ease, color .18s ease, background .18s ease, box-shadow .18s ease;
}


/* ═══════════════════════════════════════════
   28. RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 991px) {
  #board {
    margin-top: 76px !important;
  }

  .about-overview {
    grid-template-columns: 1fr;
  }

  .post-content {
    max-width: 100%;
    padding: 0 24px 12px;
  }

  .post-hero {
    padding: 30px 0 24px;
    margin-bottom: 24px;
  }

  .post-prevnext article {
    max-width: 100%;
    flex: 0 0 100%;
  }
}

@media (max-width: 767px) {
  .navbar .container {
    padding-inline: 18px;
  }

  #board {
    padding-bottom: 28px;
  }

  #board:has(.about-avatar),
  #board:has(.post-content),
  #board:has(.tagcloud),
  #board:has(.category-list),
  #board:has(.list-group) {
    border-radius: 24px;
  }

  #board:has(.tagcloud),
  #board:has(.category-list),
  #board:has(.list-group) {
    padding: 24px 22px 28px;
  }

  .about-overview__identity,
  .about-overview__focus,
  .home-empty,
  .ex-index-card__body {
    padding: 24px 22px !important;
  }

  .about-overview__title {
    max-width: none;
    font-size: clamp(2rem, 11vw, 2.9rem);
  }

  .home-feed__header,
  .ex-index-card__footer,
  .ex-footer__main {
    align-items: flex-start;
    flex-direction: column;
  }

  .ex-footer__main {
    justify-items: flex-start;
    text-align: left;
  }

  .markdown-body {
    font-size: 15px;
    line-height: 1.75;
  }

  .ex-index-card__title a {
    font-size: 1.45rem;
  }

  #seo-header {
    font-size: clamp(1.8rem, 9vw, 2.45rem);
  }

  .nav-item .nav-link {
    font-size: .78rem !important;
  }
}


/* ═══════════════════════════════════════════
   29. PRINT
   ═══════════════════════════════════════════ */
@media print {
  .navbar, .scroll-top-arrow, .scroll-down-arrow,
  footer, #comments, .prev-next,
  .post-copyright, .category-bar, .tocbot-list {
    display: none !important;
  }
  .markdown-body { font-size: 11pt; line-height: 1.6; }
  #board::before { display: none; }
}