/* field guide article styles */

.field-guide-article {
  min-height: 100vh;
  background: var(--deep-evergreen);
  color: var(--ivory);
  padding: clamp(24px, 5vw, 80px);
  box-sizing: border-box;
}

.article-content {
  width: 100%;
  max-width: 880px;
  margin-inline: auto;
}

.article-content h1 {
  margin: 48px 0 32px;
  font-family: var(--display);
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.055em;
}

/* article nav */

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 64px;
  font-family: var(--body);
  font-size: 14px;
  color: var(--ivory);
  text-decoration: none;
}

.article-back-icon {
  color: var(--thistle);
  text-decoration: none;
}

.article-back-label {
  text-decoration: none;
}

.article-back:hover {
  color: var(--thistle);
}

.article-back:focus-visible {
  outline: 2px solid var(--thistle);
  outline-offset: 4px;
}

/* article header */

.article-header {
  margin-bottom: 80px;
  position: relative;
  isolation: isolate;
}

.article-category {
  margin: 0 0 20px;
  color: var(--thistle);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.article-header h1 {
  margin: 0 0 28px;
}

/* article typography */

.article-content .article-summary {
  font-family: var(--serif);
  color: var(--thistle);
  font-weight: 400;
  font-size: clamp(20px, 2vw, 24px);
  line-height: 1.6;
  max-width: 560px;
}

.article-body p {
  margin: 0 0 24px;
  font-family: var(--body);
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 400;
  line-height: 1.8;
  color: var(--body-ink);
}

.article-body h2 {
  margin: 64px 0 24px;
  font-family: var(--display);
  font-size: clamp(24px, 3.5vw, 28px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--ivory);
}

.article-body h3 {
  margin: 40px 0 16px;
  font-family: var(--display);
  font-size: clamp(18px, 2.5vw, 20px);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--ivory);
}

/* article table of contents */

/* desktop: static toc */
.article-toc-desktop {
  display: block;
}

.article-toc-disclosure {
  display: none;
}

.article-toc {
  margin: 0 0 48px;
}

.article-toc .toc-label {
  margin: 0 0 20px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--thistle);
}

.article-toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: toc;
}

.article-toc li {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 8px;
  margin-bottom: 8px;
  padding: 0;
  counter-increment: toc;
  margin-left: -24px;
}

.article-toc li::before {
  content: counter(toc, upper-alpha) ".";
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--thistle);
}

.article-toc a {
  font-family: var(--body);
  font-size: 14px;
  color: var(--ivory);
  text-decoration: none;
}

.article-references-preview a {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  display: inline-block;
  color: var(--ivory);
  text-decoration: underline;
  text-underline-offset: 3px;
  overflow-wrap: anywhere;
}

.article-body sup > a {
  color: var(--thistle);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-toc a:hover {
  color: var(--thistle);
}

.article-toc a:focus-visible {
  outline: 2px solid var(--thistle);
  outline-offset: 4px;
}

/* sidebar reference previews */

.article-references-preview {
  margin-top: 0;
  padding-top: 0;
}

.article-references-preview h2 {
  margin: 0 0 20px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--thistle);
}

.article-references-preview ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.article-references-preview li {
  margin-bottom: 16px;
}

.article-references-preview .uncited-reference,
.article-references-preview .cited-reference {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 4px;
  margin-left: -28px;
}

/* reference numbers stay separate from the source details */

.article-references-preview .reference-marker {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--thistle);
}

/* keep reference titles and their links together */

.article-references-preview .reference-content {
  grid-column: 2;
  min-width: 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--sage);
  overflow-wrap: break-word;
}

.article-references-preview a:hover {
  color: var(--clay-light);
}

.article-references-preview a:focus-visible {
  outline: 2px solid var(--thistle);
  outline-offset: 4px;
}

/* two-column article layout */

.article-layout {
  display: grid;
  grid-template-columns: 196px minmax(0, 1fr);
  grid-template-rows: auto 1fr;
  gap: 32px;
  align-items: start;
}

.article-layout .article-body {
  min-width: 0;
  padding-left: 32px;
  border-left: 1px solid var(--rule);
  grid-column: 2;
  grid-row: 1 / 3;
}

/* desktop article layout */

.article-layout .article-toc {
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
  margin: 0;
}

.article-layout .article-references-preview {
  grid-column: 1;
  grid-row: 2;
}

/* stack the columns on smaller screens */

@media (width <= 760px) {
  /* mobile: show disclosure instead of static toc */
  .article-toc-desktop {
    display: none;
  }

  /* mobile: collapsible table of contents */
  .article-toc-disclosure {
    display: block;
    border: 1px solid var(--rule);
    border-radius: 4px;
  }

  .article-toc-disclosure > summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px;
    cursor: pointer;
  }

  .article-toc-disclosure .toc-label {
    margin: 0;
  }

  .article-toc-disclosure .toc-chevron {
    display: block;
    width: 8px;
    height: 8px;
    border-right: 1px solid currentcolor;
    border-bottom: 1px solid currentcolor;
    transform: rotate(45deg);
  }

  .article-toc-disclosure[open] .toc-chevron {
    transform: rotate(225deg);
  }

  .article-toc-disclosure > ol {
    display: none;
    padding: 0 16px 16px;
  }

  .article-toc-disclosure[open] > ol {
    display: block;
  }

  .article-layout {
    grid-template-columns: 1fr;
    grid-template-rows: none;
    gap: 32px;
  }

  /* mobile: reduce space below article header */
  .article-header {
    margin-bottom: 56px;
  }

  /* mobile: separate references from article content */
  .article-layout .article-references-preview {
    border-top: 1px solid var(--rule);
    padding-top: 32px;
  }

  /* restore natural document order on smaller screens */
  .article-layout .article-toc,
  .article-layout .article-body,
  .article-layout .article-references-preview {
    grid-column: 1;
    grid-row: auto;
  }

  .article-layout .article-body {
    padding-left: 0;
    border-left: none;
  }

  .article-references-preview .cited-reference,
  .article-references-preview .uncited-reference {
    margin-left: 0;
  }

  .article-toc li {
    margin-left: 0;
  }
}

/* article figures */

.article-figure {
  margin: 48px 0 64px;
}

.article-figure img {
  display: block;
  max-width: 100%;
  height: auto;
}

.article-image-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 4px;
  background:
    radial-gradient(
      circle at 70% 40%,
      rgb(222 204 245 / 85%) 0%,
      rgb(222 204 245 / 20%) 28%,
      transparent 45%
    ),
    radial-gradient(
      circle at 35% 65%,
      rgb(39 70 144 / 90%) 0%,
      transparent 40%
    ),
    var(--forest);
}

.article-figure figcaption {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--thistle);
}

/* article blockquotes */

.article-blockquote {
  margin: 40px 0;
  padding: 4px 0 4px 24px;
  border-left: 2px solid var(--rule);
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 400;
  font-style: italic;
  line-height: 1.6;
  color: var(--ivory);
}

/* article callouts */

.article-callout {
  margin: 48px 0;
  padding: 20px 24px;
  background: var(--surface-raised);
  border-left: 2px solid var(--thistle);
  border-radius: 4px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

/* optional callout emoji */

.article-callout-icon {
  flex: 0 0 auto;
  font-size: 24px;
  line-height: 1.4;
}

.article-callout .article-callout-label {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--thistle);
}

.article-callout p:not(.article-callout-label) {
  margin: 0;
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ivory);
}

/* article code blocks */

.article-code-block {
  margin: 32px 0;
  background: var(--forest);
  border-radius: 4px;
  overflow: hidden;
}

.article-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--surface-raised);
}

.article-code-language {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--thistle);
}

.article-code-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--sage);
  cursor: pointer;
}

.article-code-copy:hover {
  background: var(--surface-raised);
  color: var(--ivory);
}

.article-code-copy:focus-visible {
  outline: 2px solid var(--thistle);
  outline-offset: 2px;
}

/* screen-reader announcement for code copying */

.article-code-copy-status {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.article-code {
  margin: 0;
  padding: 20px 24px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ivory);
}

/* syntax highlighting */

.article-code pre.astro-code {
  margin: 0;
  padding: 0;
  background: transparent !important;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.article-code pre.astro-code code {
  font-family: inherit;
  font-size: inherit;
}

/* article tables */

.article-table-scroll {
  max-width: 100%;
  overflow-x: auto;
  border-radius: 4px;
}

.article-table-scroll:focus-visible {
  outline: 2px solid var(--thistle);
  outline-offset: 4px;
}

.article-table {
  width: 100%;
  min-width: 480px;
  margin: 32px 0;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--forest);
  border-radius: 4px;
  font-family: var(--body);
  font-size: 14px;
  line-height: 1.7;
}

.article-table th,
.article-table td {
  padding: 6px 24px;
  text-align: left;
  vertical-align: top;
}

/* table outer spacing */

.article-table tr:first-child > * {
  padding-top: 14px;
}

.article-table tr:last-child > * {
  padding-bottom: 14px;
}

.article-table tr:has(> th[scope="col"]) > * {
  padding-top: 14px;
  padding-bottom: 14px;
}

.article-table tr:has(> th[scope="col"]) + tr > * {
  padding-top: 14px;
}

.article-table th {
  color: var(--thistle);
  font-weight: 700;
  vertical-align: middle;
}

.article-table th[scope="row"] {
  vertical-align: top;
}

.article-table th[scope="col"] {
  border-bottom: 1px solid rgb(205 180 219 / 40%);
}

/* row header divider */

.article-table:has(th[scope="row"]) tr > :first-child {
  border-right: 1px solid rgb(205 180 219 / 40%);
}

/* inline reference citations */

.article-body sup {
  font-family: var(--mono);
  font-size: 0.7em;
  line-height: 0;
  vertical-align: super;
}

.article-body sup a:hover {
  color: var(--clay-light);
}

.article-body sup a:focus-visible {
  outline: 2px solid var(--thistle);
  outline-offset: 3px;
}

/* full article references */

.article-references {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.article-references h2 {
  margin: 0 0 24px;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--ivory);
}

.article-references ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.article-references li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 8px;
  margin-bottom: 16px;
  font-family: var(--body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--body-ink);
  scroll-margin-top: 96px;
}

.article-references .reference-number {
  font-family: var(--mono);
  color: var(--thistle);
}

/* citation return links */

.article-references .reference-backlink {
  display: inline-block;
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 20px;
  line-height: 1;
  color: var(--thistle);
  text-decoration: none;
}

.article-references .reference-backlink:hover {
  color: var(--ivory);
}

.article-references .reference-backlink:focus-visible {
  outline: 2px solid var(--thistle);
  outline-offset: 4px;
}

/* related concepts tbc */

.article-related {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.article-related h2 {
  margin: 0 0 24px;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--ivory);
}

.article-related ul {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.article-related li {
  font-family: var(--body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ivory);
}

/* nested table of contents */

.article-toc .toc-subsections {
  grid-column: 2;
  margin-top: 10px;
  padding-left: 0;
  counter-reset: none;
}

.article-toc .toc-subsections li {
  display: grid;
  grid-template-columns: 6px minmax(0, 1fr);
  gap: 8px;
  margin: 0 0 10px;
  padding: 0;
  counter-increment: none;
}

.article-toc .toc-subsections li::before {
  content: "•";
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--thistle);
}

/* notion article lists — initial semantic baseline; visual refinement follows review. */

.article-body .notion-list {
  margin: 0 0 24px;
  padding-left: 1.5em;
  color: var(--body-ink);
  font-family: var(--body);
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.8;
}

.article-body .notion-list li {
  margin: 0 0 4px;
  padding-left: 0.2em;
}

.article-body .notion-list .notion-list {
  margin: 4px 0;
}

.article-body .notion-task-list {
  list-style: none;
  padding-left: 0;
}

.article-body .notion-task-list > li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.65em;
}

.article-body .notion-task-list > li > .notion-list {
  flex-basis: 100%;
}

/* article task lists */

.notion-task-list input[type="checkbox"] {
  appearance: none;
  width: 16px;
  height: 16px;
  margin: 0;
  flex-shrink: 0;
  border: 1px solid var(--thistle);
  border-radius: 2px;
  background: var(--surface-raised);
  opacity: 1;
  cursor: default;
}

.notion-task-list input[type="checkbox"]:checked {
  background-color: var(--thistle);
  border-color: var(--thistle);
  background-image: none;
}

.notion-task-list input[type="checkbox"]:checked::after {
  content: "";
  display: block;
  width: 4px;
  height: 8px;
  border: solid var(--forest);
  border-width: 0 2px 2px 0;
  transform: translate(4px, 1px) rotate(45deg);
}

/* completed task text */

.article-body .notion-task-list input:checked + span {
  color: var(--sage);
  text-decoration: line-through;
}