/* Article detail page */

:root {
  --code-bg: #0a0d0b;
  --code-text: #c7d2c6;
}

:root[data-theme="light"] {
  --code-bg: #efe9dc;
  --code-text: #333a32;
}

.reading-progress {
  z-index: 110;
  background: rgba(8, 10, 9, .55);
}
:root[data-theme="light"] .reading-progress { background: rgba(242, 238, 227, .55); }

/* Cover ------------------------------------------------------------------- */

.article-cover-index {
  position: absolute;
  z-index: 1;
  right: var(--pad);
  bottom: 36px;
  color: transparent;
  font: italic 400 190px/.75 var(--serif);
  letter-spacing: -.08em;
  -webkit-text-stroke: 1px rgba(236, 232, 221, .18);
  pointer-events: none;
  user-select: none;
}

.article-cover-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 25px;
}
.cover-tag {
  padding: 5px 8px;
  border: 1px solid rgba(236, 232, 221, .18);
  color: rgba(236, 232, 221, .62);
  font: 500 9px var(--mono);
  letter-spacing: .03em;
}

.article-hero .page-lede { max-width: 680px; }
.article-hero .hero-scroll { display: none; }
.article-hero h1 { text-wrap: wrap; }

.title-break { display: inline; }

/* Layout ------------------------------------------------------------------ */

.reading-layout {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 74px var(--pad) 120px;
  display: grid;
  grid-template-columns: minmax(0, 720px) 240px;
  gap: 76px;
  align-items: start;
}

.reading-body { min-width: 0; }

/* Mobile table of contents ------------------------------------------------- */

.toc-mobile {
  display: none;
  margin: 0 0 34px;
  border: 1px solid var(--line);
  background: var(--surface);
}
.toc-mobile summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 15px;
  color: var(--text);
  font: 500 10px var(--mono);
  letter-spacing: .08em;
  cursor: pointer;
  list-style: none;
}
.toc-mobile summary::-webkit-details-marker { display: none; }
.toc-mobile summary::after {
  content: "+";
  color: var(--accent);
  font-size: 14px;
}
.toc-mobile[open] summary::after { content: "−"; }
.toc-mobile .toc { padding: 0 15px 12px; }

/* Prose ------------------------------------------------------------------- */

.prose {
  max-width: 720px;
  color: var(--body-text);
  font-size: 17px;
  line-height: 2.02;
  letter-spacing: .005em;
}

.prose > p { margin: 0 0 1.45em; }

.prose .prose-lead {
  margin-bottom: 1.9em;
  color: var(--text);
  font-size: 19px;
  line-height: 2;
}

.prose h2 {
  display: flex;
  align-items: baseline;
  gap: 13px;
  margin: 2.5em 0 .85em;
  color: var(--text-strong);
  font-size: 30px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -.025em;
  scroll-margin-top: 108px;
}
.prose h2 .section-no {
  color: var(--accent);
  font: 500 9px var(--mono);
  letter-spacing: .1em;
  transform: translateY(-3px);
}

.prose h3 {
  margin: 2.1em 0 .65em;
  color: var(--text);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -.01em;
  scroll-margin-top: 108px;
}

.prose strong { color: var(--text); font-weight: 600; }

.prose a {
  color: var(--accent);
  border-bottom: 1px solid rgba(98, 214, 197, .38);
  transition: border-color .2s ease;
}
.prose a:hover { border-bottom-color: var(--accent); }

.prose ul,
.prose ol {
  margin: 0 0 1.5em;
  padding-left: 1.35em;
}
.prose li { margin: .5em 0; padding-left: .2em; }
.prose li::marker { color: var(--accent); }

.prose blockquote {
  margin: 2.4em 0;
  padding: 4px 0 4px 26px;
  border-left: 2px solid var(--accent);
  color: var(--text);
  font: 400 23px/1.7 var(--serif);
  letter-spacing: -.01em;
}
.prose blockquote p { margin: 0; }
.prose blockquote cite {
  display: block;
  margin-top: 12px;
  color: var(--faint);
  font: normal 9px var(--mono);
  letter-spacing: .1em;
}

.prose code {
  padding: 2px 5px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--accent);
  font: 12.5px var(--mono);
}

.prose hr {
  height: 1px;
  margin: 2.6em 0;
  border: 0;
  background: var(--line);
}

/* Callout ----------------------------------------------------------------- */

.callout {
  margin: 2.2em 0;
  padding: 18px 21px 17px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  background: var(--surface);
}
.callout-label {
  margin: 0 0 9px;
  color: var(--accent);
  font: 500 8.5px var(--mono);
  letter-spacing: .16em;
}
.callout p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.85;
}

/* Code -------------------------------------------------------------------- */

.code-block {
  margin: 2.1em 0;
  border: 1px solid var(--line);
  background: var(--code-bg);
  overflow: hidden;
}
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
  font: 500 8px var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.copy-code {
  padding: 2px 6px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--faint);
  font: 500 8px var(--mono);
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease;
}
.copy-code:hover { color: var(--accent); border-color: var(--accent); }

.code-block pre {
  margin: 0;
  padding: 17px 18px 19px;
  overflow-x: auto;
  color: var(--code-text);
  font: 12.5px/1.85 var(--mono);
  tab-size: 2;
}
.code-block code { padding: 0; border: 0; background: transparent; color: inherit; font: inherit; }
.tok-key { color: var(--accent); }
.tok-str { color: var(--warm); }
.tok-com { color: var(--faint); font-style: italic; }

/* Table ------------------------------------------------------------------- */

.table-scroll {
  margin: 2em 0;
  overflow-x: auto;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.prose table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 13.5px;
  line-height: 1.65;
}
.prose th {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line-strong);
  color: var(--faint);
  font: 500 8.5px var(--mono);
  letter-spacing: .1em;
  text-align: left;
  text-transform: uppercase;
}
.prose td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  vertical-align: top;
}
.prose tr:last-child td { border-bottom: 0; }
.prose td:first-child { color: var(--text); }

/* Footnotes --------------------------------------------------------------- */

.footnotes {
  margin-top: 2.8em;
  padding-top: 17px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font: 500 10.5px/1.8 var(--sans);
}
.footnotes p { margin: 0 0 .5em; }
.footnotes sup { color: var(--accent); font: 500 8px var(--mono); }

.end-mark {
  margin: 3em 0;
  color: var(--accent);
  font: 500 12px var(--mono);
  letter-spacing: .2em;
  text-align: center;
  opacity: .55;
}

/* End matter -------------------------------------------------------------- */

.article-end {
  max-width: 720px;
  margin-top: 54px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.article-tag {
  padding: 5px 9px;
  border: 1px solid var(--line);
  color: var(--muted);
  font: 500 9.5px var(--mono);
  transition: color .2s ease, border-color .2s ease;
}
.article-tag:hover { color: var(--accent); border-color: var(--accent); }

.article-share {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 20px;
  color: var(--faint);
  font: 500 9px var(--mono);
}
.article-share button {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  cursor: pointer;
}
.article-share button:hover { color: var(--accent); }

.author-card {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 15px;
  align-items: center;
  margin-top: 30px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.author-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--accent);
  font: italic 400 20px var(--serif);
}
.author-name {
  margin: 0;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
}
.author-bio {
  margin: 4px 0 0;
  color: var(--faint);
  font-size: 11px;
  line-height: 1.7;
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 28px;
}
.post-nav a {
  display: block;
  padding: 15px 16px;
  border: 1px solid var(--line);
  background: transparent;
  transition: border-color .2s ease, background-color .2s ease;
}
.post-nav a:hover { border-color: var(--accent); background: var(--accent-soft); }
.post-nav small {
  display: block;
  margin-bottom: 8px;
  color: var(--faint);
  font: 500 8px var(--mono);
  letter-spacing: .12em;
}
.post-nav strong {
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
}
.post-nav a:last-child { text-align: right; }

/* Rail -------------------------------------------------------------------- */

.article-rail {
  position: sticky;
  top: 100px;
  align-self: start;
  display: grid;
  gap: 26px;
}

.rail-block {
  padding-top: 13px;
  border-top: 1px solid var(--line);
}
.rail-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  color: var(--faint);
  font: 500 8px var(--mono);
  letter-spacing: .18em;
}
.rail-label::before {
  content: "";
  width: 3px;
  height: 3px;
  background: var(--accent);
}

.toc { display: grid; }
.toc a {
  display: block;
  padding: 6px 0 6px 11px;
  border-left: 1px solid var(--line);
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.55;
  transition: color .2s ease, border-color .2s ease, padding-left .2s ease;
}
.toc a:hover { color: var(--text); }
.toc a.is-active {
  padding-left: 14px;
  border-left-color: var(--accent);
  color: var(--text);
}
.toc a.toc-sub { padding-left: 24px; font-size: 10.5px; }
.toc a.toc-sub.is-active { padding-left: 27px; }

.rail-progress-row {
  display: flex;
  align-items: center;
  gap: 15px;
}
.rail-progress {
  width: 74px;
  height: 74px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: conic-gradient(var(--accent) var(--p, 0%), var(--line) 0);
  transition: background .2s linear;
}
.rail-progress > div {
  width: 64px;
  height: 64px;
  display: grid;
  place-content: center;
  border-radius: 50%;
  background: var(--bg);
  text-align: center;
}
.rail-progress strong {
  color: var(--text);
  font: 500 15px var(--mono);
}
.rail-progress span {
  margin-top: 1px;
  color: var(--faint);
  font: 500 7px var(--mono);
  letter-spacing: .14em;
}
.rail-progress-copy {
  color: var(--faint);
  font: 500 9.5px/1.7 var(--mono);
}

.rail-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.rail-tag {
  padding: 4px 7px;
  border: 1px solid var(--line);
  color: var(--muted);
  font: 500 9px var(--mono);
  transition: color .2s ease, border-color .2s ease;
}
.rail-tag:hover { color: var(--accent); border-color: var(--accent); }

.rail-actions { display: grid; gap: 9px; }
.rail-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: 500 10px var(--mono);
  text-align: left;
  cursor: pointer;
  transition: color .2s ease;
}
.rail-action:hover { color: var(--accent); }
.rail-action span { color: var(--faint); }

.rail-note {
  margin: 0;
  color: var(--faint);
  font: 500 9px/1.7 var(--mono);
}

/* Responsive --------------------------------------------------------------- */

@media (max-width: 1100px) {
  .article-cover-index { display: none; }
}

@media (max-width: 1020px) {
  .reading-layout {
    max-width: 850px;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 60px var(--pad) 104px;
  }
  .article-rail { display: none; }
  .toc-mobile { display: block; }
  .prose { max-width: 760px; }
}

@media (max-width: 700px) {
  .article-cover-index { display: none; }
  .title-break { display: none; }
  .article-hero .page-lede { max-width: none; }
  .reading-layout { padding: 42px var(--pad) 80px; }
  .toc-mobile { margin-bottom: 28px; }
  .prose { font-size: 16px; line-height: 1.92; }
  .prose .prose-lead { font-size: 17px; line-height: 1.9; }
  .prose h2 { gap: 9px; margin-top: 2.15em; font-size: 25px; }
  .prose h2 .section-no { font-size: 8px; }
  .prose h3 { font-size: 19px; }
  .prose blockquote { padding-left: 18px; font-size: 20px; line-height: 1.7; }
  .prose code { font-size: 11.5px; }
  .code-block pre { padding: 15px 14px; font-size: 11.5px; }
  .callout { padding: 15px 16px; }
  .callout p { font-size: 12.5px; }
  .prose table { font-size: 12.5px; }
  .article-end { margin-top: 38px; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav a:last-child { text-align: left; }
  .article-share { gap: 12px; }
  .author-card { margin-top: 24px; }
}

@media (max-width: 390px) {
  .article-cover-tags { margin-top: 18px; }
  .prose { font-size: 15.5px; }
}