.tfa-reading-post {
  --tfa-reading-scale: 1;
  --tfa-reading-leading: 1.72;
  --tfa-reading-width: 1;
}

.tfa-reading-post .single-content .reading-col,
.tfa-reading-post .entry-content {
  position: relative;
  font-size: calc(1.125rem * var(--tfa-reading-scale)) !important;
  line-height: var(--tfa-reading-leading) !important;
  max-width: calc(720px * var(--tfa-reading-width));
  transition: max-width .2s ease, font-size .2s ease, line-height .2s ease;
}

.tfa-reading-post .tfa-reading-tools {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin: 0 0 24px;
  padding: 12px 0;
  border-top: 1px solid var(--color-tertiary, #e4edf5);
  border-bottom: 1px solid var(--color-tertiary, #e4edf5);
}

.tfa-reading-post .tfa-article-overview {
  margin: 0 0 28px;
  padding: 18px 20px;
  border-left: 4px solid var(--color-primary, #1e7fc0);
  background: rgba(228, 237, 245, .58);
}

.tfa-reading-post .tfa-article-overview h2 {
  margin: 0 0 8px !important;
  color: var(--color-primary, #1e7fc0) !important;
  font-size: 1.15rem !important;
  line-height: 1.3 !important;
}

.tfa-reading-post .tfa-article-overview p {
  margin: 0 !important;
  font-size: 1rem !important;
  line-height: 1.6 !important;
}

.tfa-reading-post .tfa-reading-tools-primary,
.tfa-reading-post .tfa-reading-tools-secondary,
.tfa-reading-post .tfa-reading-section-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.tfa-reading-post .tfa-reading-button {
  appearance: none;
  border: 1px solid var(--color-tertiary, #e4edf5);
  border-radius: 6px;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
  font-size: .82rem;
  line-height: 1.2;
  padding: 8px 10px;
}

.tfa-reading-post .tfa-reading-button:hover,
.tfa-reading-post .tfa-reading-button:focus-visible {
  border-color: var(--color-primary, #1e7fc0);
  color: var(--color-primary, #1e7fc0);
}

.tfa-reading-post .tfa-reading-search {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .78rem;
  color: var(--color-neutral, #0d1117);
}

.tfa-reading-post .tfa-reading-search input {
  width: 170px;
  max-width: 42vw;
  border: 1px solid var(--color-tertiary, #e4edf5);
  border-radius: 6px;
  padding: 8px 9px;
  font: inherit;
  font-size: .82rem;
}

.tfa-reading-post .tfa-reading-toc {
  margin: 0 0 28px;
  padding: 12px 14px;
  border: 1px solid var(--color-tertiary, #e4edf5);
  border-radius: 6px;
  background: rgba(228, 237, 245, .45);
}

.tfa-reading-post .tfa-reading-toc summary {
  cursor: pointer;
  font-weight: 700;
}

.tfa-reading-post .tfa-reading-toc nav {
  margin-top: 12px;
}

.tfa-reading-post .tfa-reading-toc ol {
  margin: 0;
  padding-left: 22px;
}

.tfa-reading-post .tfa-reading-toc li {
  margin: 4px 0;
}

.tfa-reading-post .tfa-reading-toc li.tfa-toc-subitem {
  margin-left: 16px;
  font-size: .92em;
}

.tfa-reading-post .tfa-reading-toc a {
  text-decoration: none;
}

.tfa-reading-post .reading-col h2,
.tfa-reading-post .reading-col h3,
.tfa-reading-post .reading-col h4,
.tfa-reading-post .reading-col h5,
.tfa-reading-post .reading-col h6,
.tfa-reading-post .entry-content h2,
.tfa-reading-post .entry-content h3,
.tfa-reading-post .entry-content h4,
.tfa-reading-post .entry-content h5,
.tfa-reading-post .entry-content h6 {
  scroll-margin-top: 92px;
}

.tfa-reading-post .reading-col h2:not(:first-child),
.tfa-reading-post .entry-content h2:not(:first-child) {
  padding-top: 1.8em;
  border-top: 1px solid var(--color-tertiary, #e4edf5);
}

.tfa-reading-post .tfa-section-link {
  width: 0;
  max-width: 0;
  overflow: hidden;
  margin-left: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-primary, #1e7fc0);
  cursor: pointer;
  opacity: 0;
  font-size: .72em;
  vertical-align: middle;
  white-space: nowrap;
  transition: opacity .15s ease, width .15s ease, max-width .15s ease, margin-left .15s ease, padding .15s ease;
}

.tfa-reading-post h2:hover .tfa-section-link,
.tfa-reading-post h3:hover .tfa-section-link,
.tfa-reading-post h4:hover .tfa-section-link,
.tfa-reading-post h5:hover .tfa-section-link,
.tfa-reading-post h6:hover .tfa-section-link,
.tfa-reading-post .tfa-section-link:hover,
.tfa-reading-post .tfa-section-link:focus-visible {
  width: auto;
  max-width: 5em;
  margin-left: 8px;
  padding: 0 3px;
  opacity: 1;
}

.tfa-reading-post .tfa-reading-section-nav {
  justify-content: space-between;
  margin: 48px 0 24px;
  padding-top: 20px;
  border-top: 1px solid var(--color-tertiary, #e4edf5);
}

.tfa-reading-post .tfa-reading-end {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--color-tertiary, #e4edf5);
}

.tfa-reading-post .tfa-reading-end p {
  color: var(--color-primary, #1e7fc0);
  font-weight: 600;
}

.tfa-reading-post.tfa-reading-dim {
  --color-background: #20262b;
  --color-neutral: #e8edf0;
  --color-tertiary: #3c464d;
}

.tfa-reading-post.tfa-reading-dim .site-container,
.tfa-reading-post.tfa-reading-dim .single-content {
  background: #20262b;
  color: #e8edf0;
}

.tfa-reading-post .tfa-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(13, 17, 23, .92);
}

.tfa-reading-post .tfa-lightbox[hidden] {
  display: none;
}

.tfa-reading-post .tfa-lightbox img {
  display: block;
  max-width: min(92vw, 1200px);
  max-height: 80vh;
  width: auto;
  height: auto;
  object-fit: contain;
}

.tfa-reading-post .tfa-lightbox-caption {
  max-width: 900px;
  margin-top: 10px;
  color: #fff;
  text-align: center;
  font-size: .9rem;
}

.tfa-reading-post .tfa-lightbox-close,
.tfa-reading-post .tfa-lightbox-prev,
.tfa-reading-post .tfa-lightbox-next {
  position: absolute;
  border: 1px solid rgba(255,255,255,.65);
  border-radius: 6px;
  background: rgba(13,17,23,.65);
  color: #fff;
  cursor: pointer;
  font: inherit;
  padding: 9px 12px;
}

.tfa-reading-post .tfa-lightbox-close { top: 20px; right: 20px; }
.tfa-reading-post .tfa-lightbox-prev { left: 20px; top: 50%; }
.tfa-reading-post .tfa-lightbox-next { right: 20px; top: 50%; }
.tfa-reading-post .tfa-lightbox-count { color: #fff; text-align: center; font-size: .8rem; }

.tfa-reading-post .tfa-reference-return {
  display: inline-block;
  margin-left: 8px;
  font-size: .82rem;
}

.tfa-reading-post .tfa-bibliography-entry.is-targeted,
.tfa-reading-post .tfa-bibliography-entry.is-return-target {
  outline: 2px solid var(--color-primary, #1e7fc0);
  outline-offset: 5px;
  border-radius: 4px;
}

.tfa-reading-post .tfa-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 2000;
  width: 0;
  height: 3px;
  background: var(--color-primary, #1e7fc0);
  pointer-events: none;
}

/* Long-form article presentation. Kept inside the post body so the theme's
   homepage, archive, editor, references, and SEO surfaces are unaffected. */
.tfa-reading-post .single-post-content > h1,
.tfa-reading-post .single-post-content > .entry-title,
.tfa-reading-post .single-post-content .post-title {
  max-width: 22ch;
  margin-bottom: 24px;
  font-size: clamp(2.55rem, 5.4vw, 4.6rem) !important;
  line-height: 1.05 !important;
}

.tfa-reading-post .entry-content {
  color: var(--color-neutral, #0d1117);
}

.tfa-reading-post .entry-content p {
  max-width: 72ch;
  margin-bottom: 1.45em;
  font-size: calc(1.1rem * var(--tfa-reading-scale)) !important;
  line-height: var(--tfa-reading-leading) !important;
}

.tfa-reading-post .entry-content h2,
.tfa-reading-post .entry-content h3,
.tfa-reading-post .entry-content h4,
.tfa-reading-post .entry-content h5,
.tfa-reading-post .entry-content h6 {
  max-width: 34ch;
  font-style: normal !important;
  text-transform: none !important;
  letter-spacing: normal !important;
}

.tfa-reading-post .entry-content h2 {
  margin-top: 2.8em !important;
  margin-bottom: .75em !important;
  color: var(--color-primary, #1e7fc0) !important;
  font-family: var(--font-headline, 'Clash Display', sans-serif) !important;
  font-size: clamp(1.85rem, 3.4vw, 2.8rem) !important;
  line-height: 1.15 !important;
  font-weight: 700 !important;
}

.tfa-reading-post .entry-content h3 {
  margin-top: 2.1em !important;
  margin-bottom: .65em !important;
  color: var(--color-primary, #1e7fc0) !important;
  font-family: var(--font-headline, 'Clash Display', sans-serif) !important;
  font-size: clamp(1.45rem, 2.5vw, 2rem) !important;
  line-height: 1.22 !important;
  font-weight: 600 !important;
}

.tfa-reading-post .entry-content h4 {
  margin-top: 1.8em !important;
  margin-bottom: .55em !important;
  color: #2e5b84 !important;
  font-family: var(--font-body, 'Plus Jakarta Sans', sans-serif) !important;
  font-size: clamp(1.2rem, 1.9vw, 1.5rem) !important;
  line-height: 1.3 !important;
  font-weight: 700 !important;
}

.tfa-reading-post .entry-content h5,
.tfa-reading-post .entry-content h6 {
  margin-top: 1.5em !important;
  margin-bottom: .5em !important;
  color: var(--color-neutral, #0d1117) !important;
  font-family: var(--font-body, 'Plus Jakarta Sans', sans-serif) !important;
  font-size: 1.05rem !important;
  line-height: 1.4 !important;
  font-weight: 700 !important;
}

.tfa-reading-post .entry-content figure,
.tfa-reading-post .entry-content .wp-block-image,
.tfa-reading-post .entry-content .wp-block-gallery {
  margin: 2.5rem 0;
}

.tfa-reading-post .entry-content figure img,
.tfa-reading-post .entry-content .wp-block-image img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

.tfa-reading-post .entry-content figcaption {
  margin-top: .65rem;
  color: var(--color-neutral, #0d1117);
  font-size: .88rem;
  line-height: 1.5;
  opacity: .72;
}

.tfa-reading-post .tfa-reading-tools {
  position: sticky;
  top: 72px;
  z-index: 10;
  margin-bottom: 28px;
  padding: 10px 12px;
  background: rgba(242, 246, 250, .96);
  box-shadow: 0 1px 0 rgba(13, 17, 23, .08);
}

.tfa-reading-post .tfa-reading-button {
  min-height: 36px;
  background: rgba(255, 255, 255, .7);
  color: var(--color-neutral, #0d1117);
}

.tfa-reading-post .tfa-reading-toc {
  margin-bottom: 36px;
  padding: 18px 20px;
  background: rgba(228, 237, 245, .58);
}

.tfa-reading-post .tfa-reading-toc summary {
  color: var(--color-primary, #1e7fc0);
  font-size: 1rem;
}

.tfa-reading-post .tfa-reading-toc ol {
  max-height: min(60vh, 720px);
  overflow: auto;
  padding-right: 10px;
}

.tfa-reading-post .tfa-reading-toc li {
  line-height: 1.45;
}

@media (min-width: 1280px) {
  .tfa-reading-post .tfa-reading-toc {
    position: sticky;
    top: 92px;
    float: left;
    width: 220px;
    margin-left: -260px;
    margin-right: 40px;
  }
}

@media (max-width: 767px) {
  .tfa-reading-post .single-post-content > h1,
  .tfa-reading-post .single-post-content > .entry-title,
  .tfa-reading-post .single-post-content .post-title {
    max-width: none;
    font-size: clamp(2.2rem, 10vw, 3.2rem) !important;
  }

  .tfa-reading-post .tfa-reading-tools {
    top: 0;
    padding: 8px 0;
    background: rgba(242, 246, 250, .98);
  }

  .tfa-reading-post .tfa-reading-tools-primary {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 6px;
  }

  .tfa-reading-post .tfa-reading-tools-primary .tfa-reading-button {
    width: 100%;
    padding: 7px 5px;
    font-size: .76rem;
  }

  .tfa-reading-post .entry-content h2 {
    margin-top: 2.2em !important;
    font-size: clamp(1.7rem, 7vw, 2.25rem) !important;
  }

  .tfa-reading-post .entry-content h3 {
    margin-top: 1.8em !important;
    font-size: clamp(1.35rem, 5.5vw, 1.75rem) !important;
  }

  .tfa-reading-post .entry-content p {
    font-size: calc(1.03rem * var(--tfa-reading-scale)) !important;
  }

  .tfa-reading-post .tfa-reading-tools,
  .tfa-reading-post .tfa-reading-tools-primary,
  .tfa-reading-post .tfa-reading-tools-secondary {
    align-items: stretch;
  }

  .tfa-reading-post .tfa-reading-tools-primary,
  .tfa-reading-post .tfa-reading-tools-secondary,
  .tfa-reading-post .tfa-reading-search {
    width: 100%;
  }

  .tfa-reading-post .tfa-reading-button {
    min-height: 38px;
  }

  .tfa-reading-post .tfa-reading-search input {
    flex: 1;
    width: auto;
    max-width: none;
  }

  .tfa-reading-post .tfa-reading-toc {
    position: static;
    float: none;
    width: auto;
    margin: 0 0 24px;
  }

  .tfa-reading-post .tfa-reading-section-nav {
    align-items: stretch;
  }

  .tfa-reading-post .tfa-reading-section-nav .tfa-reading-button {
    flex: 1;
  }

  .tfa-reading-post .tfa-lightbox-prev { left: 8px; }
  .tfa-reading-post .tfa-lightbox-next { right: 8px; }
}

@media print {
  .tfa-reading-post .tfa-reading-tools,
  .tfa-reading-post .tfa-reading-toc,
  .tfa-reading-post .tfa-reading-section-nav,
  .tfa-reading-post .tfa-reading-end,
  .tfa-reading-post .tfa-section-link,
  .tfa-reading-post .tfa-progress-bar,
  .tfa-reading-post .tfa-lightbox {
    display: none !important;
  }
}

/* Final prototype-aligned surface. Keep the TOC clean and editorial in the
   existing theme content column; use the sidebar only where the theme gives
   it enough room. */
.tfa-reading-post .tfa-reading-shell {
  display: block;
  width: 100%;
}

.tfa-reading-post .tfa-reading-main {
  min-width: 0;
}

.tfa-reading-post .tfa-reading-article-body {
  min-width: 0;
  max-width: 820px;
}

.tfa-reading-post .tfa-reading-toc {
  position: static;
  float: none;
  width: auto;
  margin: 0 0 30px;
  padding: 12px 0 16px;
  border: 0;
  border-top: 1px solid var(--color-tertiary, #e4edf5);
  border-bottom: 1px solid var(--color-tertiary, #e4edf5);
  border-radius: 0;
  background: transparent;
}

.tfa-reading-post .tfa-reading-toc summary {
  color: var(--color-primary, #1e7fc0);
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.tfa-reading-post .tfa-reading-toc nav {
  margin-top: 14px;
}

.tfa-reading-post .tfa-reading-toc li {
  margin: 8px 0;
  font-size: .9rem;
  line-height: 1.45;
}

.tfa-reading-post .tfa-reading-toc a {
  color: var(--color-neutral, #0d1117);
  text-decoration: none;
}

.tfa-reading-post .tfa-reading-toc a:hover,
.tfa-reading-post .tfa-reading-toc a:focus-visible {
  color: var(--color-primary, #1e7fc0);
}

@media (min-width: 1280px) {
  .tfa-reading-post .tfa-reading-toc {
    position: sticky;
    top: 100px;
    float: left;
    width: 220px;
    margin-left: -260px;
    margin-bottom: 0;
    border-top: 1px solid var(--color-tertiary, #e4edf5);
    border-bottom: 0;
  }
}

@media (max-width: 767px) {
  .tfa-reading-post .tfa-reading-toc {
    margin-bottom: 24px;
  }

  .tfa-reading-post .tfa-reading-article-body {
    max-width: 100%;
  }
}