/* Premium editorial article layout and generated document navigation. */
.resource-single--article {
  --article-orange: #f28b36;
  --article-sky: #55c7ec;
  --article-toc-accent: var(--accent-teal);
  --article-nav-offset: 6.5rem;
  /* resources.css uses overflow:hidden on all resource singles. That makes
     this page an inert scrolling ancestor and cuts position:sticky short. */
  overflow: visible;
  overflow-x: clip;
}

.resource-single--article .article-breadcrumb {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: 1.2rem;
  color: var(--media-text-secondary);
  font-size: .65rem;
  font-weight: 650;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.resource-single--article .article-breadcrumb a {
  color: inherit;
  text-decoration: none;
  transition: color .25s ease;
}
.resource-single--article .article-breadcrumb a:hover,
.resource-single--article .article-breadcrumb a:focus-visible { color: var(--media-text); }
.resource-single--article .article-breadcrumb span { color: var(--article-orange) !important; }

.resource-single--article .article-layout {
  position: relative;
  padding: clamp(4.5rem, 8vw, 8rem) 0 clamp(6rem, 10vw, 10rem);
  background:
    radial-gradient(circle at 8% 8%, color-mix(in srgb, var(--article-sky) 7%, transparent), transparent 24rem),
    var(--background-primary);
}

.resource-single--article .article-layout > .container {
  display: grid;
  grid-template-columns: minmax(190px, 23%) minmax(0, 760px);
  justify-content: center;
  align-items: start;
  gap: clamp(2.5rem, 5vw, 6rem);
  width: min(calc(100% - 2 * var(--type-gutter, 1.5rem)), 1240px);
}

.resource-single--article .article-rail {
  position: sticky;
  top: var(--article-nav-offset);
  align-self: start;
  height: max-content;
  display: block;
  max-height: calc(100dvh - var(--article-nav-offset) - 1.5rem);
  overflow: hidden auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  padding: 0 .7rem 1rem 0;
  color: var(--text-muted);
  text-transform: none;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.article-rail__meta {
  display: flex;
  align-items: center;
  gap: .65rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--border);
  font-size: .66rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.article-rail__meta span { color: var(--article-orange); }
.article-rail__meta b { color: var(--text-primary); font-weight: 650; }
.article-rail__meta span + b::before { content: '·'; margin-right: .65rem; color: var(--text-muted); }

.article-toc { min-width: 0; }
.article-toc summary {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: .75rem;
  min-height: 2.5rem;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  font-size: .73rem;
  font-weight: 750;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.article-toc summary::-webkit-details-marker { display: none; }
.article-toc summary small {
  color: var(--text-muted);
  font-size: .58rem;
  font-weight: 550;
  letter-spacing: .03em;
  text-transform: none;
}
.article-toc summary i { display: none; }

.article-toc__nav {
  position: relative;
  display: grid;
  margin-top: .65rem;
  padding-left: 1rem;
}
.article-toc__nav::before {
  content: '';
  position: absolute;
  inset: .45rem auto .45rem 0;
  width: 1px;
  background: var(--article-toc-accent);
  opacity: .3;
}

.article-toc__link {
  position: relative;
  display: grid;
  grid-template-columns: 1.8rem minmax(0, 1fr);
  gap: .25rem;
  align-items: baseline;
  padding: .52rem 0;
  border: 0;
  color: var(--text-muted) !important;
  text-decoration: none;
  font-size: .74rem;
  line-height: 1.45;
  transition: color .25s ease, transform .25s ease;
}
.article-toc__link::before {
  content: '';
  position: absolute;
  top: .95rem;
  left: calc(-1rem - 2px);
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--background-primary);
  border: 1px solid var(--border-strong);
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.article-toc__link span {
  color: var(--text-muted) !important;
  font-size: .54rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: .05em;
  opacity: .7;
}
.article-toc__link b { font-weight: 560; }
.article-toc__link--h3 { padding-left: .85rem; font-size: .7rem; }
.article-toc__link:hover,
.article-toc__link:focus-visible { color: var(--article-toc-accent) !important; transform: translateX(2px); }
.article-toc__link:hover :where(span, b),
.article-toc__link:focus-visible :where(span, b) { color: var(--article-toc-accent) !important; }
.article-toc__link:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 3px; border-radius: 3px; }
.article-toc__link.is-active,
.article-toc__link.is-active :where(span, b) { color: var(--article-toc-accent) !important; }
.article-toc__link.is-active::before {
  background: var(--article-toc-accent);
  border-color: var(--article-toc-accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--article-toc-accent) 16%, transparent);
}
.article-toc__link.is-active b { font-weight: 700; }

.resource-single--article .article-share {
  margin-top: 1.8rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}
.resource-single--article .article-share > span {
  margin-right: .2rem;
  color: var(--text-muted);
  font-size: .6rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.resource-single--article .article-share a,
.resource-single--article .article-share button {
  border-color: var(--border-strong);
  color: var(--text-primary);
}
.resource-single--article .article-share a:hover,
.resource-single--article .article-share button:hover {
  border-color: var(--article-sky);
  background: color-mix(in srgb, var(--article-sky) 10%, transparent);
}

.resource-single--article .article-manuscript {
  width: 100%;
  max-width: 760px;
  min-width: 0;
  color: var(--text-secondary);
  font-size: clamp(1.02rem, 1.15vw, 1.13rem);
  line-height: 1.88;
  overflow-wrap: anywhere;
}
.resource-single--article .article-manuscript > :first-child { margin-top: 0; }
.resource-single--article .article-manuscript h2,
.resource-single--article .article-manuscript h3 {
  scroll-margin-top: calc(var(--article-nav-offset) + 1rem);
  text-wrap: balance;
}
.resource-single--article .article-manuscript h2 {
  position: relative;
  margin-top: clamp(4.2rem, 7vw, 6.5rem);
  padding-top: 1.4rem;
  border-top: 1px solid var(--border);
  color: var(--text-primary);
  font-size: clamp(2rem, 3.25vw, 3.25rem);
  line-height: 1.05;
}
.resource-single--article .article-manuscript h2::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(3.5rem, 9vw, 7rem);
  height: 2px;
  background: linear-gradient(90deg, var(--article-orange), var(--article-sky));
}
.resource-single--article .article-manuscript h3 {
  margin-top: 2.8rem;
  color: var(--text-primary);
  font-size: clamp(1.25rem, 2vw, 1.65rem);
}
.resource-single--article .article-manuscript p,
.resource-single--article .article-manuscript li { color: var(--text-secondary); }
.resource-single--article .article-manuscript ul,
.resource-single--article .article-manuscript ol {
  margin-block: 1.8rem;
  padding-left: 1.35rem;
}
.resource-single--article .article-manuscript li { padding-left: .35rem; }
.resource-single--article .article-manuscript li::marker { color: var(--article-orange); }
.resource-single--article .article-manuscript strong { color: var(--text-primary); }
.resource-single--article .article-manuscript a { color: var(--accent-teal); text-underline-offset: .22em; }
.resource-single--article .article-manuscript table {
  display: block;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  margin: 2.2rem 0;
  border-collapse: collapse;
  border: 1px solid var(--border);
}
.resource-single--article .article-manuscript th,
.resource-single--article .article-manuscript td {
  min-width: 9rem;
  padding: .9rem 1rem;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.resource-single--article .article-manuscript th { color: var(--text-primary); background: var(--surface-raised); }

@media (max-width: 820px) {
  .resource-single--article .article-layout > .container { grid-template-columns: minmax(0, 760px); gap: 2rem; }
  .resource-single--article .article-rail {
    position: static;
    max-height: none;
    overflow: visible;
    padding: 0;
  }
  .article-rail__meta { margin-bottom: 1rem; }
  .article-toc {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface);
  }
  .article-toc summary {
    grid-template-columns: 1fr auto 1rem;
    min-height: 3.6rem;
    padding: 0 1rem;
  }
  .article-toc summary i {
    position: relative;
    display: block;
    width: 12px;
    height: 12px;
  }
  .article-toc summary i::before,
  .article-toc summary i::after {
    content: '';
    position: absolute;
    top: 5px;
    left: 0;
    width: 12px;
    height: 1px;
    background: var(--text-primary);
    transition: transform .25s ease;
  }
  .article-toc summary i::after { transform: rotate(90deg); }
  .article-toc[open] summary i::after { transform: rotate(0); }
  .article-toc__nav { margin: 0 1rem 1rem; padding-top: .45rem; border-top: 1px solid var(--border); }
  .resource-single--article .article-share { display: none; }
}

@media (max-width: 640px) {
  .resource-single--article .article-layout { padding-top: 3rem; }
  .resource-single--article .article-layout > .container { width: min(calc(100% - 2rem), 760px); }
  .article-toc summary small { display: none; }
  .article-toc summary { grid-template-columns: 1fr 1rem; }
  .article-toc__link { font-size: .72rem; }
  .resource-single--article .article-manuscript { font-size: 1rem; line-height: 1.8; }
  .resource-single--article .article-manuscript h2 { margin-top: 4rem; font-size: clamp(1.85rem, 9vw, 2.55rem); }
  .resource-single--article .article-manuscript blockquote { margin-inline: 0; padding: 1.25rem 1.35rem; }
}

@media (prefers-reduced-motion: reduce) {
  .article-toc__link,
  .article-toc__link::before,
  .article-toc summary i::after { transition: none; }
}

@media print {
  .resource-single--article .article-rail { display: none !important; }
  .resource-single--article .article-layout > .container { display: block !important; }
}