/* Single Article reader, figures, tables, source list, sidebar and image viewer. */
.articles-reader-shell {
  display: grid;
  grid-template-columns: minmax(0, var(--articles-reader)) minmax(15.5rem, var(--articles-sidebar));
  align-items: start;
  justify-content: center;
  gap: clamp(2rem, 5vw, 4.5rem);
  width: min(100%, var(--articles-container));
  margin-inline: auto;
  padding: clamp(3rem, 8vw, 6.25rem) var(--articles-space-page) var(--articles-space-8);
}

.articles-reader {
  min-width: 0;
}

.articles-reader-header {
  margin-bottom: var(--articles-space-7);
}

.articles-reader-header h1 {
  max-width: 18ch;
  font-size: clamp(2.55rem, 6.2vw, 4.85rem);
}

.articles-reader-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.2rem;
  margin: var(--articles-space-4) 0 0;
  padding: 0;
  color: var(--articles-muted-soft);
  font-size: var(--articles-text-xs);
  list-style: none;
}

.articles-reader-header__meta li + li::before {
  margin-right: 1.2rem;
  color: rgba(189, 201, 218, 0.35);
  content: "\2022";
}

.articles-toc {
  margin: 0 0 var(--articles-space-7);
  border: 1px solid var(--articles-line);
  border-radius: var(--articles-radius-md);
  overflow: hidden;
  background: rgba(13, 25, 43, 0.84);
}

.articles-toc summary {
  padding: 1rem 1.15rem;
  color: var(--articles-ink-strong);
  cursor: pointer;
  font-weight: 800;
}

.articles-toc nav,
.articles-toc > ol {
  padding: 0 1.15rem 1.1rem;
}

.articles-toc ol {
  margin: 0;
  padding-left: 1.4rem;
}

.articles-toc li {
  margin: 0.45rem 0;
  color: var(--articles-muted);
}

.articles-toc a {
  color: #d9e3ef;
  text-decoration-line: underline;
  text-decoration-color: rgba(244, 170, 37, 0.45);
  text-underline-offset: 0.2em;
}

.articles-toc a[aria-current="location"] {
  color: var(--articles-gold-light);
  font-weight: 750;
}

.articles-prose {
  color: #ced8e5;
  font-size: var(--articles-text-lg);
  line-height: 1.82;
}

.articles-prose > * {
  max-width: var(--articles-readable);
}

.articles-prose > :first-child {
  margin-top: 0;
}

.articles-prose h2,
.articles-prose h3,
.articles-prose h4 {
  color: var(--articles-ink-strong);
  font-family: var(--articles-font-serif);
  line-height: 1.18;
  letter-spacing: -0.015em;
  scroll-margin-top: 1.5rem;
  text-wrap: balance;
}

.articles-prose h2 {
  margin: clamp(2.8rem, 7vw, 4.7rem) 0 1rem;
  font-size: clamp(1.85rem, 4vw, 2.65rem);
}

.articles-prose h3 {
  margin: 2.4rem 0 0.8rem;
  font-size: clamp(1.4rem, 2.6vw, 1.8rem);
}

.articles-prose p {
  margin: 0 0 1.25rem;
}

.articles-prose strong {
  color: var(--articles-ink-strong);
  font-weight: 750;
}

.articles-prose :where(ul, ol) {
  margin-block: 1.15rem 1.6rem;
  padding-left: 1.5rem;
}

.articles-prose li {
  margin: 0.52rem 0;
  padding-left: 0.2rem;
}

.articles-prose li::marker {
  color: var(--articles-gold-light);
  font-weight: 800;
}

.articles-prose a {
  color: #f4c871;
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.articles-prose blockquote {
  margin: 1.8rem 0;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--articles-gold);
  color: #d9e3ef;
  background: var(--articles-panel);
}

.articles-callout,
.articles-formula,
.articles-deep-dive {
  max-width: none;
  margin: var(--articles-space-6) 0;
  border: 1px solid var(--articles-line-soft);
  border-radius: var(--articles-radius-md);
  padding: clamp(1.1rem, 3vw, 1.5rem);
  background: var(--articles-panel);
}

.articles-formula {
  border-color: var(--articles-line);
  text-align: center;
}

.articles-formula__expression {
  margin: 0;
  color: var(--articles-ink-strong);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.65rem, 4vw, 2.5rem);
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.articles-deep-dive {
  padding: 0;
  overflow: hidden;
}

.articles-deep-dive summary {
  padding: 1rem 1.2rem;
  color: var(--articles-ink-strong);
  cursor: pointer;
  font-weight: 800;
}

.articles-deep-dive > :not(summary) {
  padding-inline: 1.2rem;
}

.articles-deep-dive > :last-child {
  padding-bottom: 1.2rem;
}

.articles-basics {
  margin: var(--articles-space-6) 0;
  border: 1px solid var(--articles-line);
  border: 1px solid color-mix(in srgb, var(--module-accent, var(--articles-gold)) 46%, var(--articles-line-soft));
  border-radius: var(--articles-radius-md);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(15, 36, 52, 0.96), rgba(8, 20, 33, 0.96));
  box-shadow: var(--articles-shadow-sm);
}

.articles-basics summary {
  display: grid;
  gap: 0.2rem;
  padding: 1rem 1.2rem;
  color: var(--articles-ink-strong);
  cursor: pointer;
}

.articles-basics summary span {
  font-weight: 850;
}

.articles-basics summary small {
  color: var(--articles-muted);
  font-size: var(--articles-text-sm);
  font-weight: 600;
}

.articles-basics__body {
  padding: 0 1.2rem 1.2rem;
  border-top: 1px solid var(--articles-line-soft);
}

.articles-basics__body h2 {
  margin-top: 1.2rem;
}

.articles-basics__terms {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 1rem 0;
}

.articles-basics__terms > div {
  padding: 0.85rem;
  border: 1px solid var(--articles-line-soft);
  border-radius: var(--articles-radius-sm);
  background: rgba(5, 11, 22, 0.34);
}

.articles-basics__terms dt {
  color: var(--articles-ink-strong);
  font-weight: 800;
}

.articles-basics__terms dd {
  margin: 0.35rem 0 0;
  color: var(--articles-muted);
}

.articles-basics__tip {
  margin-bottom: 0;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--module-accent, var(--articles-gold));
  background: rgba(5, 11, 22, 0.42);
}

.articles-figure {
  max-width: none;
  margin: clamp(2rem, 6vw, 3.6rem) 0;
}

.articles-figure > button[data-viewer-open] {
  position: relative;
  display: block;
  width: 100%;
  min-height: 9rem;
  border: 1px solid var(--articles-line-soft);
  border-radius: var(--articles-radius-md);
  overflow: hidden;
  padding: 0;
  color: var(--articles-ink-strong);
  background: var(--articles-navy-950);
  box-shadow: var(--articles-shadow-sm);
  text-align: left;
  text-decoration: none;
  cursor: zoom-in;
}

.articles-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: contain;
  background: var(--articles-navy-950);
}

.articles-figure figcaption {
  margin-top: 0.7rem;
  color: var(--articles-muted-soft);
  font-size: var(--articles-text-sm);
  line-height: 1.6;
}

.articles-table-wrap {
  max-width: none;
  margin: var(--articles-space-6) 0;
  border: 1px solid var(--articles-line-soft);
  border-radius: var(--articles-radius-md);
  overflow-x: auto;
  background: var(--articles-panel);
  -webkit-overflow-scrolling: touch;
}

.articles-table-wrap table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
  color: #d6e0ec;
  font-size: var(--articles-text-sm);
}

.articles-table-wrap :where(th, td) {
  padding: 0.8rem 0.9rem;
  border-bottom: 1px solid var(--articles-line-soft);
  text-align: left;
  vertical-align: top;
}

.articles-table-wrap th {
  color: var(--articles-ink-strong);
  background: rgba(244, 170, 37, 0.08);
  font-weight: 800;
}

body.articles-viewer-open { overflow: hidden; }

/* Shared renderer components. */
.articles-share {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--articles-space-2);
  margin-top: var(--articles-space-5);
  color: var(--articles-muted-soft);
  font-size: var(--articles-text-xs);
}

.articles-share > span:first-child {
  flex-basis: 100%;
  color: #dce5f1;
  font-weight: 750;
}

.articles-share [data-share-action="native"] { display: none; }
.articles-share.has-native-share [data-share-action="native"] { display: inline-flex; }

.articles-share__status {
  flex-basis: 100%;
  min-height: 1.25rem;
  color: var(--articles-muted-soft);
}

.articles-callout h3,
.articles-callout__title {
  margin: 0 0 0.5rem;
  color: var(--articles-gold-light);
  font-family: var(--articles-font-sans);
  font-size: var(--articles-text-sm);
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.articles-callout__title {
  margin-block: 0 0.5rem;
}

.articles-callout--warning { border-color: rgba(244, 170, 37, 0.5); }
.articles-callout--safety { border-color: rgba(255, 180, 171, 0.5); }
.articles-callout--tip { border-color: rgba(120, 221, 185, 0.42); }

.articles-formula > h3 {
  margin: 0 0 0.8rem;
  font-family: var(--articles-font-sans);
  font-size: var(--articles-text-sm);
  letter-spacing: 0.04em;
}

.articles-formula > p:not(.articles-formula__expression) {
  margin: 0.8rem auto 0;
  color: var(--articles-muted);
  font-size: var(--articles-text-sm);
}

.articles-formula dl {
  display: grid;
  gap: 0.4rem;
  max-width: 36rem;
  margin: 1.15rem auto 0;
  text-align: left;
}

.articles-formula dl > div {
  display: grid;
  grid-template-columns: minmax(3.5rem, auto) minmax(0, 1fr);
  gap: 0.8rem;
  padding-top: 0.4rem;
  border-top: 1px solid var(--articles-line-soft);
}

.articles-formula :where(dt, dd) { margin: 0; }
.articles-formula dt { color: var(--articles-gold-light); font-weight: 800; }
.articles-formula dd { color: var(--articles-muted); }

.articles-formula__example {
  max-width: 36rem;
  margin: 1.2rem auto 0;
  padding: 0.8rem 1rem;
  border-radius: var(--articles-radius-sm);
  color: var(--articles-muted);
  background: rgba(5, 11, 22, 0.48);
  text-align: left;
}

.articles-formula__example p { margin-bottom: 0; }

.articles-list li > span,
.articles-steps li > span {
  display: block;
  margin-top: 0.2rem;
}

.articles-figure > button[data-viewer-open] > span {
  display: block;
  padding: 0.6rem 0.8rem;
  color: var(--articles-gold-light);
  background: rgba(8, 15, 32, 0.92);
  font-size: var(--articles-text-xs);
  font-weight: 750;
}

html:not(.articles-js) .articles-figure > button[data-viewer-open] {
  cursor: default;
}

html:not(.articles-js) .articles-figure > button[data-viewer-open] > span {
  display: none;
}

.articles-figure__description {
  margin-top: 0.75rem;
  border-left: 2px solid var(--articles-line);
  padding-left: 0.85rem;
  color: var(--articles-muted);
  font-size: var(--articles-text-sm);
}

.articles-figure__description summary {
  color: #dce5f1;
  font-weight: 750;
}

.articles-table-wrap caption {
  padding: 0.8rem 0.9rem;
  color: var(--articles-muted);
  font-weight: 750;
  text-align: left;
}

.articles-references {
  max-width: none;
  margin-top: var(--articles-space-8);
  padding-top: var(--articles-space-6);
  border-top: 1px solid var(--articles-line-soft);
}

.articles-references h2 { margin-top: 0; }

.articles-references li {
  margin-bottom: 0.9rem;
  overflow-wrap: anywhere;
  font-size: var(--articles-text-sm);
}

.articles-references :where(small, span) {
  display: block;
  color: var(--articles-muted-soft);
  line-height: 1.55;
}

.articles-references a {
  color: #f4c871;
  text-decoration-line: underline;
  text-decoration-color: rgba(244, 170, 37, 0.5);
  text-underline-offset: 0.2em;
}

.articles-sidebar {
  position: sticky;
  top: 1.25rem;
  max-height: calc(100vh - 2.5rem);
  max-height: calc(100dvh - 2.5rem);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(244, 170, 37, 0.45) transparent;
}

.articles-sidebar h2 {
  margin: 0 0 var(--articles-space-3);
  font-family: var(--articles-font-serif);
  font-size: 1.45rem;
  line-height: 1.25;
}

.articles-sidebar h2 a {
  text-decoration-line: underline;
  text-decoration-color: rgba(244, 170, 37, 0.48);
  text-underline-offset: 0.2em;
}

.articles-sidebar ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.articles-sidebar li {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.45rem;
  padding: 0.62rem 0;
  border-top: 1px solid rgba(189, 201, 218, 0.1);
  color: var(--articles-muted-soft);
  font-size: 0.76rem;
  line-height: 1.42;
}

.articles-sidebar li:first-child { border-top: 0; }
.articles-sidebar li > span:first-child { color: var(--module-accent, var(--articles-gold-light)); font-weight: 800; }
.articles-sidebar li > :last-child { min-width: 0; }

.articles-sidebar li a {
  color: #cbd7e5;
  text-decoration-line: underline;
  text-decoration-color: transparent;
}

.articles-sidebar li a:hover,
.articles-sidebar li a:focus-visible {
  color: var(--articles-ink-strong);
  text-decoration-color: var(--articles-gold);
}

.articles-sidebar li.is-current {
  color: var(--articles-ink-strong);
}

.articles-sidebar li a[aria-current="page"] {
  color: var(--articles-gold-light);
  font-weight: 800;
}

.articles-sidebar__modules {
  display: grid;
  gap: 0.2rem;
  margin-top: var(--articles-space-5);
  padding-top: var(--articles-space-4);
  border-top: 1px solid var(--articles-line);
}

.articles-sidebar__modules a {
  padding-block: 0.35rem;
  color: #cbd7e5;
  font-size: 0.78rem;
  text-decoration-line: underline;
  text-decoration-color: transparent;
}

.articles-sidebar__modules a:hover,
.articles-sidebar__modules a:focus-visible {
  color: var(--articles-ink-strong);
  text-decoration-color: var(--articles-gold);
}

/* The production viewer uses the compact component markup and receives its
   toolbar/zoom control through progressive enhancement. */
.articles-viewer {
  width: min(96vw, 90rem);
  max-width: none;
  height: min(94vh, 62rem);
  height: min(94dvh, 62rem);
  max-height: none;
  margin: auto;
  border: 1px solid rgba(244, 170, 37, 0.36);
  border-radius: var(--articles-radius-md);
  padding: 0;
  color: var(--articles-ink);
  background: var(--articles-navy-950);
  box-shadow: 0 32px 100px rgba(0, 0, 0, 0.72);
}

.articles-viewer::backdrop {
  background: rgba(1, 5, 12, 0.9);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}

.articles-viewer[open] { display: grid; }

.articles-viewer.is-fallback-open {
  position: fixed;
  z-index: 1000;
  inset: 3vh 2vw;
  display: grid;
}

.articles-viewer__inner {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  min-width: 0;
  min-height: 0;
}

.articles-viewer__toolbar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--articles-space-3);
  min-height: 3.5rem;
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--articles-line-soft);
  background: rgba(8, 15, 32, 0.96);
}

.articles-viewer__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.45rem;
}

.articles-viewer__toolbar button {
  min-height: 2.5rem;
  border: 1px solid rgba(189, 201, 218, 0.34);
  border-radius: var(--articles-radius-sm);
  padding: 0.5rem 0.75rem;
  color: var(--articles-ink-strong);
  background: var(--articles-navy-750);
  font-weight: 750;
}

.articles-viewer__toolbar button:hover,
.articles-viewer__toolbar button:focus-visible {
  border-color: var(--articles-gold);
  background: var(--articles-navy-700);
}

.articles-viewer__canvas {
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 0;
  overflow: auto;
  padding: 1rem;
  overscroll-behavior: contain;
  touch-action: pan-x pan-y pinch-zoom;
  -webkit-overflow-scrolling: touch;
}

.articles-viewer__canvas img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 100%;
  object-fit: contain;
  background: var(--articles-navy-950);
  cursor: zoom-in;
}

.articles-viewer.is-zoomed .articles-viewer__canvas {
  display: block;
}

.articles-viewer.is-zoomed .articles-viewer__canvas img {
  max-width: none;
  max-height: none;
  cursor: zoom-out;
}

.articles-viewer__caption {
  margin: 0;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--articles-line-soft);
  color: var(--articles-muted);
  background: var(--articles-navy-900);
  font-size: var(--articles-text-sm);
  text-align: center;
}

@media (max-width: 61rem) {
  .articles-reader-shell {
    grid-template-columns: minmax(0, var(--articles-reader));
  }

  .articles-sidebar {
    position: static;
    max-height: none;
    overflow: visible;
    order: 2;
  }
}

@media (max-width: 42rem) {
  .articles-reader-shell { padding-inline: 1rem; }

  .articles-reader-header__meta {
    display: grid;
    gap: 0.25rem;
  }

  .articles-reader-header__meta li + li::before { display: none; }

  .articles-figure { margin-inline: -0.25rem; }

  .articles-basics__terms { grid-template-columns: minmax(0, 1fr); }

  .articles-viewer {
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    max-height: none;
    border: 0;
    border-radius: 0;
  }

  .articles-viewer.is-fallback-open { inset: 0; }

  .articles-viewer__toolbar {
    align-items: flex-start;
    padding-top: max(0.65rem, env(safe-area-inset-top, 0px));
    padding-right: max(0.8rem, env(safe-area-inset-right, 0px));
    padding-left: max(0.8rem, env(safe-area-inset-left, 0px));
  }

  .articles-viewer__toolbar > strong {
    padding-top: 0.55rem;
    font-size: var(--articles-text-sm);
  }
}

@media print {
  .articles-reader-shell {
    display: block;
    padding: 0;
  }

  .articles-sidebar,
  .articles-viewer,
  .articles-share,
  .articles-toc {
    display: none !important;
  }

  .articles-prose { color: #111; }

  .articles-prose h2,
  .articles-prose h3,
  .articles-prose strong { color: #000; }

  .articles-basics > :not(summary) { display: block !important; }
}