/* ============================================
   Custom Blog Enhancements
   Francisco Mendes — FranciscoRMendes.github.io
   ============================================ */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Lora:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&display=swap');

body,
.content,
.navbar-item,
.title,
.subtitle,
.button,
.input,
.tag,
.card-content,
.widget,
.footer {
  font-family: 'Lora', Georgia, serif !important;
}

code,
pre,
.highlight,
tt,
kbd,
samp {
  font-family: 'IBM Plex Mono', monospace !important;
}

/* Body text */
article.article .content {
  font-weight: 400;
  letter-spacing: 0;
}

/* ---------- Drop caps ---------- */
article.article .content > p:first-of-type::first-letter {
  font-family: 'Lora', Georgia, serif;
  font-size: 3.6em;
  font-weight: 700;
  float: left;
  line-height: 0.78;
  margin: 0.06em 0.1em 0 0;
  color: #1e293b;
}

/* ---------- Background ---------- */
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background:
    radial-gradient(ellipse at 15% 15%, rgba(210, 190, 150, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 85%, rgba(190, 165, 120, 0.08) 0%, transparent 50%),
    linear-gradient(160deg, #f5f1ea 0%, #f8f4ed 50%, #f3efe7 100%) fixed !important;
  min-height: 100vh;
}

/* Branded text selection */
::selection {
  background: rgba(50, 115, 220, 0.18);
  color: inherit;
}

/* ---------- Navbar ---------- */
.navbar-main {
  background: rgba(255, 255, 255, 0.75) !important;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6), 0 4px 24px rgba(0, 0, 0, 0.06) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-main .navbar-item {
  font-weight: 500;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  transition: color 0.15s ease !important;
  position: relative;
}

/* Animated underline on nav hover */
.navbar-main a.navbar-item::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 18px;
  height: 2px;
  background: linear-gradient(90deg, #3273dc, #7c3aed);
  border-radius: 2px;
  transition: transform 0.2s ease;
}

.navbar-main a.navbar-item:hover::after,
.navbar-main a.navbar-item.is-active::after {
  transform: translateX(-50%) scaleX(1);
}

.navbar-logo img {
  filter: drop-shadow(0 1px 3px rgba(0,0,0,0.15));
}

/* ---------- Cards (posts + sidebar) ---------- */
.card {
  border-radius: 16px !important;
  background: rgba(255, 255, 255, 0.68) !important;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05), 0 8px 28px rgba(0, 0, 0, 0.07) !important;
  border: 1px solid rgba(255, 255, 255, 0.75) !important;
  transition: box-shadow 0.3s ease, transform 0.3s ease, background 0.3s ease !important;
}

.card:hover {
  background: rgba(255, 255, 255, 0.82) !important;
  box-shadow:
    0 4px 16px rgba(50, 115, 220, 0.1),
    0 24px 56px rgba(50, 115, 220, 0.1) !important;
  transform: translateY(-4px);
}

/* Sidebar widget cards shouldn't float as much */
.sidebar .card:hover {
  transform: translateY(-2px);
}

/* ---------- Post card thumbnails ---------- */
.card .card-image {
  border-radius: 14px 14px 0 0;
  overflow: hidden;
}

.card .card-image img {
  transition: transform 0.5s ease, filter 0.4s ease !important;
  display: block;
  filter: sepia(0.18) saturate(0.82) brightness(1.01);
}

.card:hover .card-image img {
  transform: scale(1.05);
  filter: none;
}

/* ---------- Post card title links ---------- */
.card .card-content .title a {
  transition: color 0.2s ease;
}

.card .card-content .title a:hover {
  color: #3273dc !important;
}

/* ---------- Image color grading ---------- */
article.article .content img {
  filter: sepia(0.18) saturate(0.82) brightness(1.01);
  transition: filter 0.4s ease;
  border-radius: 6px;
}

article.article .content img:hover {
  filter: none;
}

/* ---------- Article content typography ---------- */
article.article .content {
  font-size: 1.05rem;
  line-height: 1.9;
  color: #374151;
  max-width: 690px;
  margin-left: auto;
  margin-right: auto;
}

/* Post page title */
article.article .article-title {
  font-family: 'Lora', Georgia, serif;
  font-size: 2.1rem !important;
  font-weight: 700 !important;
  letter-spacing: 0 !important;
  line-height: 1.25 !important;
  color: #0f172a !important;
  max-width: 690px;
  margin-left: auto !important;
  margin-right: auto !important;
}

article.article .content h1,
article.article .content h2,
article.article .content h3,
article.article .content h4,
article.article .content h5 {
  font-weight: 600;
  color: #111827;
  margin-top: 2.25rem;
  margin-bottom: 0.75rem;
}

article.article .content h2 {
  padding-bottom: 0.45rem;
  border-bottom: 2px solid;
  border-image: linear-gradient(90deg, #3273dc 0%, rgba(50, 115, 220, 0.15) 55%, transparent 100%) 1;
}

/* ---------- Blockquotes ---------- */
article.article .content blockquote {
  border-left: 4px solid #3273dc !important;
  background: linear-gradient(to right, rgba(50, 115, 220, 0.06), transparent) !important;
  border-radius: 0 8px 8px 0 !important;
  padding: 1rem 1.5rem !important;
  margin: 1.75rem 0 !important;
  color: #4b5563;
  font-style: italic;
}

/* ---------- Code ---------- */
article.article .content pre {
  border-radius: 10px !important;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.14) !important;
}

article.article .content :not(pre) > code {
  background: #f0f4ff !important;
  color: #3730a3 !important;
  border-radius: 4px !important;
  padding: 0.15em 0.45em !important;
  font-size: 0.875em !important;
}

/* ---------- Links in article ---------- */
article.article .content a:not(.button):not(.tag) {
  color: #3273dc;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s ease, color 0.2s ease;
}

article.article .content a:not(.button):not(.tag):hover {
  color: #1d4ed8;
  text-decoration-color: currentColor;
}

/* ---------- Tables ---------- */
article.article .content .table-container,
article.article .content table {
  width: 100%;
}

article.article .content table {
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

article.article .content thead th {
  background-color: rgba(50, 115, 220, 0.06);
  font-weight: 600;
  letter-spacing: 0.03em;
  font-size: 0.85em;
  text-transform: uppercase;
}

/* ---------- Article tags ---------- */
.article-tags .tag,
.article-meta .tag {
  border-radius: 20px !important;
  font-weight: 500;
  font-size: 0.73rem;
  letter-spacing: 0.03em;
  padding: 0 0.85em;
  height: 1.9em;
  line-height: 1.9em;
  transition: all 0.2s ease !important;
}

.article-tags .tag:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.12) !important;
}

/* ---------- Profile widget ---------- */
/* Gradient banner behind the avatar — no backdrop blur to avoid child image blurriness */
[data-type="profile"] .card {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  background:
    linear-gradient(135deg, #3273dc 0%, #7c3aed 100%) top / 100% 150px no-repeat,
    rgba(255, 255, 255, 0.72) !important;
  overflow: hidden !important;
}

[data-type="profile"] .card:hover {
  background:
    linear-gradient(135deg, #3273dc 0%, #7c3aed 100%) top / 100% 150px no-repeat,
    rgba(255, 255, 255, 0.85) !important;
  box-shadow:
    0 4px 16px rgba(50, 115, 220, 0.15),
    0 24px 56px rgba(50, 115, 220, 0.12) !important;
}

/* Push content down so the banner is visible above the avatar */
[data-type="profile"] .card-content {
  padding: 60px 1.25rem 1.5rem !important;
}

[data-type="profile"] .image.is-128x128 {
  width: 128px;
  height: 128px;
}

[data-type="profile"] .image img.avatar {
  border-radius: 50% !important;
  object-fit: cover;
  object-position: center top;
  width: 100%;
  height: 100%;
  filter: none !important;
  image-rendering: high-quality;
  box-shadow:
    0 0 0 4px #fff,
    0 0 0 7px rgba(114, 58, 237, 0.35),
    0 8px 32px rgba(0, 0, 0, 0.22) !important;
  transition: transform 0.3s ease, box-shadow 0.3s ease !important;
}

[data-type="profile"] .image img.avatar:hover {
  transform: scale(1.04);
  box-shadow:
    0 0 0 4px #fff,
    0 0 0 8px rgba(114, 58, 237, 0.5),
    0 12px 40px rgba(0, 0, 0, 0.28) !important;
}

[data-type="profile"] .title.is-size-4 {
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 0.75rem;
  color: #0f172a;
}

/* Social link icon buttons */
[data-type="profile"] .button.is-transparent {
  border-radius: 50% !important;
  width: 2.4em;
  height: 2.4em;
  transition: background-color 0.2s ease, transform 0.2s ease, color 0.2s ease !important;
}

[data-type="profile"] .button.is-transparent:hover {
  transform: translateY(-2px);
  background-color: rgba(50, 115, 220, 0.08) !important;
  color: #3273dc !important;
}

/* Stat counters (posts / categories / tags) */
[data-type="profile"] .level.is-mobile .title {
  font-weight: 600;
  color: #3273dc;
}

/* Article card gets more generous padding */
article.article > .card > .card-content {
  padding: 2rem 2.5rem;
}

@media screen and (max-width: 768px) {
  article.article > .card > .card-content {
    padding: 1.5rem 1.25rem;
  }
}

/* ---------- Sidebar widget cards spacing ---------- */
.sidebar .card-content {
  padding: 1.2rem 1.25rem;
}

/* ---------- Tags cloud ---------- */
.widget .tags .tag {
  border-radius: 20px !important;
  transition: all 0.2s ease !important;
}

.widget .tags .tag:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.12) !important;
}

/* ---------- Pagination ---------- */
.pagination-link,
.pagination-previous,
.pagination-next {
  border-radius: 8px !important;
  transition: all 0.2s ease !important;
}

/* ---------- Footer ---------- */
.footer {
  background: #1e293b !important;
  color: #94a3b8 !important;
  padding: 2.5rem 1.5rem !important;
}

.footer a {
  color: #94a3b8 !important;
  transition: color 0.2s ease !important;
}

.footer a:hover {
  color: #e2e8f0 !important;
}

.footer .icon {
  color: #64748b !important;
}

/* ---------- Progress bar ---------- */
#nprogress .bar {
  background: linear-gradient(90deg, #3273dc, #7c3aed) !important;
  height: 3px !important;
}

#nprogress .peg {
  box-shadow: 0 0 10px #7c3aed, 0 0 5px #7c3aed !important;
}

/* ---------- Back-to-top button ---------- */
#back-to-top {
  border-radius: 50% !important;
  background: linear-gradient(135deg, #3273dc, #7c3aed) !important;
  box-shadow: 0 4px 16px rgba(50, 115, 220, 0.35) !important;
  transition: all 0.3s ease !important;
}

#back-to-top:hover {
  transform: translateY(-3px) !important;
  box-shadow: 0 8px 24px rgba(50, 115, 220, 0.5) !important;
}

/* ---------- Section spacing ---------- */
.section.main {
  padding-top: 2rem;
  padding-bottom: 3rem;
}

/* ---------- Article read-more button ---------- */
.article-more {
  border-radius: 8px !important;
  font-weight: 500;
  transition: all 0.2s ease !important;
}

.article-more:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1) !important;
}

/* ---------- Custom scrollbar ---------- */
@media screen and (min-width: 1088px) {
  ::-webkit-scrollbar {
    width: 7px;
    height: 7px;
  }

  ::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.04);
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.18);
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: rgba(50, 115, 220, 0.5);
  }
}

/* ---------- Series navigation box ---------- */
.series-box {
  border: 1px solid rgba(50, 115, 220, 0.2);
  border-left: 4px solid #3273dc;
  border-radius: 0 8px 8px 0;
  background: linear-gradient(to right, rgba(50, 115, 220, 0.04), transparent);
  padding: 1rem 1.25rem 1rem 1.5rem;
  margin-bottom: 2.5rem;
}

.series-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #3273dc;
  margin-bottom: 0.2rem;
}

.series-name {
  font-family: 'Lora', Georgia, serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 0.75rem;
}

.series-list {
  margin: 0 !important;
  padding-left: 1.25rem !important;
  list-style: decimal !important;
}

.series-item {
  font-size: 0.875rem;
  line-height: 1.6;
  color: #64748b;
  margin-bottom: 0.15rem !important;
}

.series-item a {
  color: #3273dc !important;
  text-decoration: none !important;
}

.series-item a:hover {
  text-decoration: underline !important;
  text-underline-offset: 2px;
}

.series-item.series-current span {
  color: #0f172a;
  font-weight: 600;
}

/* ---------- Smooth transitions site-wide ---------- */
a {
  transition: color 0.15s ease, background-color 0.15s ease, opacity 0.15s ease;
}

/* ---------- Popular posts on home page ---------- */
.popular-posts {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(50, 115, 220, 0.18);
}

.popular-posts-heading {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #9ca3af;
  margin-bottom: 0.75rem;
}

.popular-posts-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: popular-counter;
}

.popular-posts-list li {
  counter-increment: popular-counter;
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.popular-posts-list li:last-child {
  border-bottom: none;
}

.popular-posts-list li::before {
  content: counter(popular-counter, decimal-leading-zero);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: #d1d5db;
  min-width: 1.6em;
  flex-shrink: 0;
}

.popular-posts-list li a {
  font-size: 0.92rem;
  line-height: 1.45;
  color: #374151;
  text-decoration: none;
  transition: color 0.2s ease;
}

.popular-posts-list li a:hover {
  color: #3273dc !important;
}

/* ---------- Footnotes ---------- */
article.article .content sup {
  line-height: 0;
  vertical-align: super;
  font-size: 0.72em;
}

article.article .content sup a {
  color: #3273dc !important;
  text-decoration: none !important;
  font-weight: 600;
  padding: 0 1px;
}

article.article .content sup a:hover {
  text-decoration: underline !important;
}

article.article .content .footnotes,
article.article .content section.footnotes {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  font-size: 0.83rem;
  color: #6b7280;
  line-height: 1.75;
}

article.article .content .footnotes ol,
article.article .content section.footnotes ol {
  padding-left: 1.5rem;
  margin: 0 !important;
}

article.article .content .footnotes li,
article.article .content section.footnotes li {
  margin-bottom: 0.4rem;
}

/* Suppress ⁂ ornament on the auto-generated footnote separator */
article.article .content .footnotes hr::after,
article.article .content section.footnotes hr::after {
  display: none;
}

/* ---------- Category-tinted cards ---------- */
.card[data-category] {
  position: relative;
  overflow: hidden;
}

.card[data-category]::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  z-index: 1;
}

.card[data-category="machine-learning"]::before { background: rgba(59, 130, 246, 0.55); }
.card[data-category="statistics"]::before       { background: rgba(13, 148, 136, 0.55); }
.card[data-category="opinion"]::before          { background: rgba(245, 158, 11, 0.55); }
.card[data-category="economics"]::before        { background: rgba(5, 150, 105, 0.55); }
.card[data-category="books"]::before            { background: rgba(161, 98, 7, 0.55); }
.card[data-category="physics"]::before          { background: rgba(124, 58, 237, 0.55); }
.card[data-category="mathematics"]::before      { background: rgba(79, 70, 229, 0.55); }

/* ---------- Display math (MathJax v3) ---------- */
article.article .content mjx-container[display="true"] {
  display: block;
  padding: 1.25rem 1.75rem;
  margin: 2rem 0 !important;
  background: rgba(50, 115, 220, 0.04);
  border-radius: 6px;
  border-left: 3px solid rgba(50, 115, 220, 0.18);
  overflow-x: auto;
}

/* ---------- Horizontal rules ---------- */
article.article .content hr {
  border: none;
  height: auto;
  margin: 3rem 0;
  text-align: center;
  background: none;
}

article.article .content hr::after {
  content: '⁂';
  display: inline-block;
  color: #94a3b8;
  font-size: 1.1rem;
  letter-spacing: 0.5em;
}

/* ============================================
   Dark Mode  (html.dark — set by dark-mode.js)
   ============================================ */

/* Smooth theme transitions on key surfaces */
body,
.navbar-main,
.card {
  transition: background 0.25s ease, background-color 0.25s ease,
              color 0.25s ease, border-color 0.25s ease !important;
}

/* --- Body background --- */
html.dark body {
  background:
    radial-gradient(ellipse at 8% 8%, rgba(59, 89, 200, 0.18) 0%, transparent 48%),
    radial-gradient(ellipse at 92% 92%, rgba(109, 58, 190, 0.12) 0%, transparent 48%),
    linear-gradient(160deg, #0c1220 0%, #0f172a 45%, #0b1120 100%) fixed !important;
}

/* --- Navbar --- */
html.dark .navbar-main {
  background: rgba(10, 18, 35, 0.85) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  box-shadow: 0 1px 0 rgba(255,255,255,0.04), 0 4px 24px rgba(0,0,0,0.5) !important;
}

html.dark .navbar-main .navbar-item,
html.dark .navbar-main .navbar-link {
  color: #94a3b8 !important;
}

html.dark .navbar-main a.navbar-item:hover,
html.dark .navbar-main .navbar-link:hover {
  background-color: rgba(255, 255, 255, 0.05) !important;
  color: #e2e8f0 !important;
}

html.dark .navbar-main a.navbar-item::after {
  background: linear-gradient(90deg, #60a5fa, #a78bfa);
}

/* Mobile collapsed menu */
html.dark .navbar-menu {
  background: rgba(10, 18, 35, 0.97) !important;
}

/* --- Cards --- */
html.dark .card {
  background: rgba(17, 28, 50, 0.72) !important;
  border: 1px solid rgba(255, 255, 255, 0.07) !important;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4), 0 8px 28px rgba(0,0,0,0.5) !important;
}

html.dark .card:hover {
  background: rgba(22, 36, 62, 0.85) !important;
  box-shadow:
    0 4px 16px rgba(96, 165, 250, 0.08),
    0 24px 56px rgba(96, 165, 250, 0.06) !important;
}

html.dark .card .card-content {
  color: #94a3b8 !important;
}

html.dark .card .card-content .title,
html.dark .card .card-content .title a {
  color: #e2e8f0 !important;
}

html.dark .card .card-content .title a:hover {
  color: #60a5fa !important;
}

/* --- Article body --- */
html.dark article.article .content {
  color: #cbd5e1 !important;
}

html.dark article.article .article-title {
  color: #f1f5f9 !important;
}

html.dark article.article .content h1,
html.dark article.article .content h2,
html.dark article.article .content h3,
html.dark article.article .content h4,
html.dark article.article .content h5 {
  color: #f1f5f9 !important;
}

html.dark article.article .content h2 {
  border-image: linear-gradient(90deg, #60a5fa 0%, rgba(96,165,250,0.15) 55%, transparent 100%) 1;
}

html.dark article.article .content a:not(.button):not(.tag) {
  color: #60a5fa;
}

html.dark article.article .content a:not(.button):not(.tag):hover {
  color: #93c5fd !important;
}

html.dark article.article .content blockquote {
  border-left-color: #60a5fa !important;
  background: linear-gradient(to right, rgba(96,165,250,0.08), transparent) !important;
  color: #94a3b8 !important;
}

html.dark article.article .content :not(pre) > code {
  background: rgba(96, 165, 250, 0.12) !important;
  color: #93c5fd !important;
}

html.dark article.article .content pre {
  box-shadow: 0 4px 24px rgba(0,0,0,0.5) !important;
}

html.dark article.article .content table {
  color: #cbd5e1 !important;
}

html.dark article.article .content thead th {
  background-color: rgba(96, 165, 250, 0.08) !important;
  color: #e2e8f0 !important;
}

html.dark article.article .content td,
html.dark article.article .content th {
  border-color: rgba(255, 255, 255, 0.08) !important;
}

/* --- Article meta --- */
html.dark .article-meta .level-item,
html.dark .article-meta a {
  color: #475569 !important;
}

html.dark .article-tags .tag,
html.dark .article-meta .tag {
  background: rgba(96, 165, 250, 0.12) !important;
  color: #93c5fd !important;
}

/* --- Sidebar widgets --- */
html.dark .widget .menu-label,
html.dark .widget li a {
  color: #64748b !important;
}

html.dark .widget li a:hover {
  color: #93c5fd !important;
}

html.dark .widget .title {
  color: #cbd5e1 !important;
}

html.dark .widget .tags .tag {
  background: rgba(96, 165, 250, 0.1) !important;
  color: #60a5fa !important;
}

html.dark .widget .tags .tag:hover {
  background: rgba(96, 165, 250, 0.2) !important;
}

/* --- Profile widget --- */
html.dark [data-type="profile"] .card {
  background:
    linear-gradient(135deg, #1d3d7a 0%, #3b1f6e 100%) top / 100% 90px no-repeat,
    rgba(17, 28, 50, 0.85) !important;
}

html.dark [data-type="profile"] .card:hover {
  background:
    linear-gradient(135deg, #1d3d7a 0%, #3b1f6e 100%) top / 100% 90px no-repeat,
    rgba(22, 36, 62, 0.9) !important;
}

html.dark [data-type="profile"] .title.is-size-4 {
  color: #f1f5f9 !important;
}

html.dark [data-type="profile"] .level-item p.heading {
  color: #475569 !important;
}

html.dark [data-type="profile"] .level-item .title {
  color: #60a5fa !important;
}

html.dark [data-type="profile"] .button.is-transparent {
  color: #64748b !important;
}

html.dark [data-type="profile"] .button.is-transparent:hover {
  background-color: rgba(96, 165, 250, 0.1) !important;
  color: #60a5fa !important;
}

/* --- Popular posts (home page) --- */
html.dark .popular-posts {
  border-top-color: rgba(96, 165, 250, 0.15);
}

html.dark .popular-posts-list li {
  border-bottom-color: rgba(255, 255, 255, 0.04);
}

html.dark .popular-posts-list li a {
  color: #94a3b8;
}

html.dark .popular-posts-list li a:hover {
  color: #60a5fa !important;
}

/* --- Image color grading --- */
html.dark article.article .content img {
  filter: sepia(0.08) saturate(0.75) brightness(0.88) contrast(0.95);
}

html.dark article.article .content img:hover,
html.dark .card:hover .card-image img {
  filter: none;
}

html.dark .card .card-image img {
  filter: sepia(0.08) saturate(0.75) brightness(0.88) contrast(0.95);
}

/* --- Drop caps --- */
html.dark article.article .content > p:first-of-type::first-letter {
  color: #f1f5f9;
}

/* --- Footnotes --- */
html.dark article.article .content sup a {
  color: #60a5fa !important;
}

html.dark article.article .content .footnotes,
html.dark article.article .content section.footnotes {
  border-top-color: rgba(255, 255, 255, 0.07);
  color: #475569;
}

/* --- Display math --- */
html.dark article.article .content mjx-container[display="true"] {
  background: rgba(96, 165, 250, 0.06);
  border-left-color: rgba(96, 165, 250, 0.25);
}

/* --- Horizontal rules --- */
html.dark article.article .content hr::after {
  color: #334155;
}

/* --- Series box --- */
html.dark .series-box {
  border-color: rgba(96, 165, 250, 0.2);
  border-left-color: #60a5fa;
  background: linear-gradient(to right, rgba(96,165,250,0.06), transparent);
}

html.dark .series-name {
  color: #e2e8f0;
}

html.dark .series-item {
  color: #475569 !important;
}

/* --- Pagination --- */
html.dark .pagination-link,
html.dark .pagination-previous,
html.dark .pagination-next {
  background: rgba(17, 28, 50, 0.7) !important;
  border-color: rgba(255, 255, 255, 0.08) !important;
  color: #94a3b8 !important;
}

html.dark .pagination-link:hover,
html.dark .pagination-previous:hover,
html.dark .pagination-next:hover {
  color: #e2e8f0 !important;
  border-color: rgba(96, 165, 250, 0.3) !important;
}

html.dark .pagination-link.is-current {
  background: #3273dc !important;
  color: #fff !important;
}

/* --- Dark mode toggle button --- */
#dark-mode-toggle {
  cursor: pointer;
  padding: 0 0.5rem !important;
}

#dark-mode-toggle .icon {
  color: #9ca3af;
  transition: color 0.2s ease, transform 0.4s ease;
}

#dark-mode-toggle:hover .icon {
  color: #3273dc !important;
  transform: rotate(20deg);
}

html.dark #dark-mode-toggle .icon {
  color: #64748b;
}

html.dark #dark-mode-toggle:hover .icon {
  color: #fbbf24 !important;
  transform: rotate(30deg);
}

/* ---------- Background noise texture ---------- */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='256' height='256'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='256' height='256' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
}