/* =====================================================================
   QOC — page-specific styles (built on the tokens in main.css)
   1. Field map      2. Topic pages & articles      3. Home: papers chart
   ===================================================================== */

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}
.page-hero-compact { padding-bottom: 24px; }

/* ---------------------------------------------------------------- 1. Field map */
.fm { margin-bottom: 56px; }
.fm-toolbar { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.fm-search {
  flex: 1; min-width: 0; display: flex; align-items: center; gap: 10px;
  padding: 0 14px; height: 46px; border-radius: 12px;
  background: var(--bg-elev); border: 1px solid var(--line); color: var(--ink-3);
}
.fm-search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
.fm-search input {
  flex: 1; min-width: 0; height: 100%; border: 0; outline: 0; background: transparent;
  font: inherit; color: var(--ink);
}
.fm-zoom { display: flex; gap: 2px; padding: 3px; border-radius: 12px; background: var(--bg-elev); border: 1px solid var(--line); }
.fm-zoom .icon-btn { width: 38px; height: 38px; font-size: 1.15rem; font-weight: 600; }

.fm-legend { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.fm-fam {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  padding: .36em .8em; border-radius: 999px; font: inherit; font-size: .8rem; font-weight: 500;
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--ink-2);
}
.fm-fam .fam-dot { width: 8px; height: 8px; }
.fm-fam:hover { color: var(--ink); border-color: color-mix(in srgb, var(--fam) 50%, var(--line)); }
.fm-fam[aria-pressed="true"] { color: var(--ink); border-color: var(--fam); background: color-mix(in srgb, var(--fam) 12%, var(--bg-elev)); }

.fm-stage {
  position: relative; border-radius: var(--radius-l); overflow: hidden;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 1px 1px, color-mix(in srgb, var(--ink-3) 22%, transparent) 1px, transparent 0) 0 0 / 22px 22px,
    var(--bg-elev);
}
.fm-canvas { overflow-x: auto; overscroll-behavior-x: contain; }
.fm-canvas svg { display: block; width: 100%; max-width: none; height: auto; touch-action: pan-x pan-y; user-select: none; }
.fm-links line { stroke: var(--line-strong); stroke-width: 1.1; transition: opacity .2s, stroke .2s; }
.fm-links line.is-hot { stroke: var(--ink-2); stroke-width: 1.8; }
.fm-links line.is-dim { opacity: .18; }
.fm-famlabels text {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: .1em;
  text-transform: uppercase; opacity: .9; pointer-events: none; transition: opacity .2s;
}
.fm-famlabels text.is-dim { opacity: .15; }
.fm-node { cursor: pointer; transition: opacity .2s; }
.fm-node circle { fill: color-mix(in srgb, var(--fam) 16%, var(--bg-elev)); stroke: var(--fam); stroke-width: 2; }
.fm-node.has-article circle { fill: var(--fam); }
.fm-node .fm-label {
  font-family: var(--font-sans); font-size: 12.5px; font-weight: 500; fill: var(--ink);
  paint-order: stroke; stroke: var(--bg-elev); stroke-width: 4px; stroke-linejoin: round;
  pointer-events: none;
}
.fm-node.is-dim { opacity: .16; }
.fm-node.is-active circle, .fm-node:focus-visible circle { stroke: var(--ink); stroke-width: 3; }
.fm-node.is-match .fm-label { font-weight: 700; }
.fm-node:focus { outline: none; }

.fm-card {
  position: absolute; left: 0; top: 0; z-index: 2; width: min(300px, 80%);
  padding: 14px 16px; border-radius: 12px;
  background: var(--bg-elev); border: 1px solid var(--line); border-top: 3px solid var(--fam);
  box-shadow: var(--shadow-hover);
}
.fm-card[hidden] { display: none; }
.fm-card p { margin: 0; }
.fm-card-fam { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--fam); }
.fm-card-title { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; margin: 4px 0 6px !important; }
.fm-card-short { font-size: .86rem; color: var(--ink-2); line-height: 1.5; }
.fm-card-link { display: inline-block; margin-top: 10px; font-size: .86rem; font-weight: 600; text-decoration: none; }

.fm-hint {
  margin: 0; padding: 10px 14px; border-top: 1px solid var(--line); background: var(--bg-elev);
  display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: .78rem; color: var(--ink-3);
}
.fm-hint > span { display: inline-flex; align-items: center; gap: 6px; }
.fm-hint-zoom { margin-left: auto; }
.fm-key { width: 10px; height: 10px; border-radius: 50%; border: 2px solid var(--ink-3); }
.fm-key-solid { background: var(--ink-3); }

.outline-title { margin-top: 8px; }
.family-head h2, .family-head h3 { display: flex; align-items: center; gap: 14px; font-size: 1.45rem; }
a.topic-card { display: flex; flex-direction: column; gap: 6px; color: inherit; text-decoration: none;
  transition: transform .2s ease, box-shadow .2s ease; }
a.topic-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.topic-card[hidden], .family-block[hidden] { display: none; }
.topic-card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.topic-card-title { font-family: var(--font-display); font-weight: 600; font-size: 1.08rem; }
.topic-card-short { font-size: .9rem; color: var(--ink-2); }
.badge-article {
  flex: none; font-family: var(--font-mono); font-size: .66rem; letter-spacing: .06em; text-transform: uppercase;
  padding: .2em .55em; border-radius: 999px; color: var(--fam); background: color-mix(in srgb, var(--fam) 12%, transparent);
}

@media (max-width: 640px) {
  .fm-hint-zoom { display: none; }
  .fm-zoom { display: none; }      /* pinch-zoom and scrolling instead */
  .fm-legend { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; scrollbar-width: none; }
  .fm-fam { flex: none; }
}

/* ---------------------------------------------------------------- 2. Topic pages */
.topic-hero {
  padding: clamp(28px, 5vw, 56px) 0 28px; border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, color-mix(in srgb, var(--fam) 7%, transparent), transparent);
}
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; font-size: .88rem; margin-bottom: 18px; color: var(--ink-3); }
.breadcrumb a { color: var(--ink-2); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink); text-decoration: underline; }
.topic-hero h1 { margin-bottom: .3em; }
.topic-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; font-size: .86rem; color: var(--ink-3); margin-top: 6px; }
.fam-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: .3em .8em; border-radius: 999px;
  color: var(--ink); text-decoration: none; font-weight: 500;
  background: color-mix(in srgb, var(--fam) 12%, var(--bg-elev)); border: 1px solid color-mix(in srgb, var(--fam) 35%, var(--line));
}
.fam-badge .fam-dot { width: 8px; height: 8px; }
.topic-aliases { margin: 16px 0 0; font-size: .86rem; color: var(--ink-3); }
.topic-aliases span {
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; margin-right: 8px;
}

.topic-layout { display: grid; grid-template-columns: minmax(0, 1fr) 250px; gap: 56px; padding-top: 36px; }
.topic-main { min-width: 0; max-width: 760px; }
.aside-sticky { position: sticky; top: calc(var(--header-h) + 24px); display: grid; gap: 28px; }
.aside-block h2 {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: .72rem; font-weight: 500; letter-spacing: .08em;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 10px;
}
.aside-block ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; border-left: 1px solid var(--line); }
.aside-block a {
  display: block; padding: 4px 0 4px 14px; margin-left: -1px; border-left: 2px solid transparent;
  color: var(--ink-2); text-decoration: none; font-size: .88rem; line-height: 1.4;
}
.aside-block a:hover { color: var(--ink); }
.aside-block a[aria-current="page"] { color: var(--ink); font-weight: 600; border-left-color: var(--fam); }
.toc a.is-current { color: var(--ink); border-left-color: var(--accent); }
.family-nav .soon { color: var(--ink-3); margin-left: 4px; }

/* article typography */
.article-body { font-size: 1.04rem; line-height: 1.72; }
.article-body > :first-child { margin-top: 0; }
.article-body h2 { font-size: 1.55rem; margin: 2.1em 0 .6em; scroll-margin-top: calc(var(--header-h) + 16px); }
.article-body h3 { font-size: 1.15rem; margin: 1.7em 0 .5em; scroll-margin-top: calc(var(--header-h) + 16px); }
.article-body p, .article-body li { color: var(--ink-2); }
.article-body strong { color: var(--ink); }
.article-body ul, .article-body ol { padding-left: 1.3em; }
.article-body li { margin-bottom: .45em; }
.article-body .katex-display { overflow-x: auto; overflow-y: hidden; padding: 4px 0; margin: 1.1em 0; }
.article-body .katex { font-size: 1.06em; }
.article-body table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: .92rem; display: block; overflow-x: auto; }
.article-body th, .article-body td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.article-body th { font-family: var(--font-display); font-weight: 600; color: var(--ink); border-bottom: 2px solid var(--line-strong); }
.article-body code { font-family: var(--font-mono); font-size: .88em; background: var(--bg-sunken); padding: .1em .35em; border-radius: 5px; }
.article-body a.topic-link {
  color: inherit; text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 55%, transparent);
  text-decoration-thickness: 2px; text-underline-offset: 3px;
}
.article-body a.topic-link:hover { color: var(--accent); }
.cite { font-size: .78em; vertical-align: .35em; line-height: 0; white-space: nowrap; color: var(--ink-3); }
.cite a { text-decoration: none; font-weight: 600; }
.cite a:hover { text-decoration: underline; }

.admonition {
  margin: 1.6em 0; padding: 16px 20px; border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--line));
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-elev));
}
.admonition > :last-child { margin-bottom: 0; }
.article-body .admonition-title {
  font-family: var(--font-mono); font-size: .74rem; font-weight: 500; letter-spacing: .08em;
  text-transform: uppercase; color: var(--accent); margin-bottom: .5em;
}
.admonition.warning {
  border-color: color-mix(in srgb, var(--st-building) 35%, var(--line));
  background: color-mix(in srgb, var(--st-building) 7%, var(--bg-elev));
}
.article-body .admonition.warning .admonition-title { color: var(--st-building); }

.article-section { margin-top: 56px; }
.article-section > h2 { font-size: 1.35rem; padding-top: 20px; border-top: 1px solid var(--line); scroll-margin-top: calc(var(--header-h) + 16px); }
.key-papers { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.key-papers li { padding: 14px 16px; border-radius: 12px; background: var(--bg-elev); border: 1px solid var(--line); }
.kp-note { margin: 8px 0 0; font-size: .92rem; color: var(--ink-2); }
.ref, .ref-list li { font-size: .9rem; line-height: 1.55; color: var(--ink-2); }
.ref-title { color: var(--ink); font-weight: 500; }
.ref-title::before { content: "\201C"; }
.ref-title::after { content: ",\201D"; }
.ref-authors::after { content: ","; }
.ref-links { white-space: nowrap; }
.ref-links a { font-family: var(--font-mono); font-size: .82em; }
.ref-list { padding-left: 1.6em; display: grid; gap: 8px; }
.ref-list li { scroll-margin-top: calc(var(--header-h) + 16px); padding-left: 4px; }
.ref-list li:target { background: color-mix(in srgb, var(--accent) 10%, transparent); border-radius: 6px; }
.software-list { padding-left: 1.2em; display: grid; gap: 6px; color: var(--ink-2); }
.software-list a { font-weight: 600; }

.article-missing { display: flex; gap: 16px; padding: 22px 24px; align-items: flex-start; }
.article-missing .icon { color: var(--accent); margin-top: 4px; }
.article-missing h2 { font-size: 1.15rem; }
.article-missing p { margin: 0; color: var(--ink-2); }

.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); gap: 12px; }
.related-card {
  display: flex; flex-direction: column; gap: 4px; padding: 14px 16px; border-radius: 12px;
  background: var(--bg-elev); border: 1px solid var(--line); border-left: 3px solid var(--fam);
  color: inherit; text-decoration: none; transition: transform .2s, box-shadow .2s;
}
.related-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.related-title { font-weight: 600; font-size: .95rem; }
.related-short {
  font-size: .82rem; color: var(--ink-3); line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}

.topic-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 48px; }
.topic-pager a {
  display: flex; flex-direction: column; gap: 2px; padding: 14px 16px; border-radius: 12px;
  border: 1px solid var(--line); text-decoration: none; color: var(--ink); font-weight: 600;
}
.topic-pager a:hover { border-color: var(--line-strong); background: var(--bg-elev); }
.topic-pager span { font-family: var(--font-mono); font-size: .7rem; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.pager-next { text-align: right; grid-column: 2; }

@media (max-width: 960px) {
  .topic-layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .topic-aside { display: none; }
}

/* ---------------------------------------------------------------- 3. Home: papers chart */
.field-stats { padding-block: clamp(32px, 6vw, 64px); }
.stats-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(24px, 4vw, 48px); align-items: center; }
.hero-figure { display: flex; flex-direction: column; gap: 6px; margin: 0 0 28px; }
.hero-value {
  font-family: var(--font-sans); font-weight: 600; font-size: clamp(3rem, 7vw, 4.4rem);
  line-height: 1; letter-spacing: -0.03em; color: var(--ink);
}
.hero-label { color: var(--ink-2); font-size: 1.02rem; }
.stat-tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 0 0 22px; }
.stat { padding: 14px 16px; border-radius: 12px; background: var(--bg-elev); border: 1px solid var(--line); }
.stat dt { font-size: .84rem; color: var(--ink-3); }
.stat dd { margin: 2px 0 0; font-size: 1.7rem; font-weight: 600; color: var(--ink); line-height: 1.2; }
.stat-delta { margin: 4px 0 0; font-size: .8rem; color: var(--ink-2); }
.stat-wide { grid-column: 1 / -1; }
.stats-note { font-size: .86rem; color: var(--ink-3); margin: 0; }

.chart-card { margin: 0; padding: 20px 20px 14px; }
.chart-title { font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; color: var(--ink); margin-bottom: 6px; }
.chart-title span { display: block; font-family: var(--font-sans); font-weight: 400; font-size: .82rem; color: var(--ink-3); }
.chart-wrap { position: relative; }
.year-chart { display: block; width: 100%; height: auto; overflow: visible; }
.chart-grid line { stroke: var(--line); stroke-width: 1; shape-rendering: crispEdges; }
.chart-grid line.baseline { stroke: var(--line-strong); }
.chart-grid text, .year-chart .year, .year-chart .year-note {
  font-family: var(--font-sans); font-size: 12px; fill: var(--ink-3); font-variant-numeric: tabular-nums;
}
.year-chart .year { fill: var(--ink-2); font-size: 12.5px; }
.year-chart .year-note { font-size: 10.5px; }
.year-chart .cap { font-family: var(--font-sans); font-size: 12.5px; font-weight: 600; fill: var(--ink); }
.year-chart .bar path { fill: var(--accent); transition: opacity .15s; }
.year-chart .bar.is-partial path { fill: color-mix(in srgb, var(--accent) 45%, var(--bg-elev)); }
.year-chart .hit { fill: transparent; }
.year-chart .bar { cursor: default; outline: none; }
.year-chart .bar:hover .hit, .year-chart .bar:focus-visible .hit { fill: color-mix(in srgb, var(--ink) 4%, transparent); }
.year-chart.has-hover .bar:not(.is-hover) path { opacity: .55; }

.chart-tip {
  position: absolute; left: 0; top: 0; z-index: 3; pointer-events: none; white-space: nowrap;
  padding: 8px 12px; border-radius: 10px; font-size: .84rem; line-height: 1.4;
  background: var(--bg-elev); border: 1px solid var(--line); box-shadow: var(--shadow-hover); color: var(--ink-2);
}
.chart-tip[hidden] { display: none; }
.chart-tip strong { display: block; color: var(--ink); font-size: .95rem; }

.chart-table { margin-top: 10px; font-size: .86rem; }
.chart-table summary { cursor: pointer; color: var(--ink-3); width: max-content; }
.chart-table summary:hover { color: var(--ink); }
.chart-table table { width: 100%; border-collapse: collapse; margin-top: 8px; font-variant-numeric: tabular-nums; }
.chart-table th, .chart-table td { text-align: right; padding: 5px 8px; border-bottom: 1px solid var(--line); }
.chart-table th:first-child { text-align: left; }
.chart-table thead th { color: var(--ink-3); font-weight: 500; }

@media (max-width: 900px) {
  .stats-grid { grid-template-columns: minmax(0, 1fr); }
}

/* about page: term list */
.term-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.term-list code { font-family: var(--font-mono); font-size: .78rem; padding: .2em .55em; border-radius: 6px; background: var(--bg-sunken); border: 1px solid var(--line); color: var(--ink-2); }

/* The chart SVG scales down on phones: enlarge its text in viewBox units to stay legible. */
@media (max-width: 560px) {
  .chart-grid text { font-size: 19px; }
  .year-chart .year { font-size: 19px; }
  .year-chart .year-note { font-size: 16px; }
  .year-chart .cap { font-size: 19px; }
  .stat-tiles { grid-template-columns: minmax(0, 1fr); }
}

/* about page: data-quality list */
.quality-list { display: grid; gap: 12px; margin: 1em 0; }
.quality-list > div { padding: 12px 16px; border-radius: 10px; background: var(--bg-elev); border: 1px solid var(--line); }
.quality-list dt { font-weight: 600; color: var(--ink); margin-bottom: 4px; }
.quality-list dd { margin: 0; font-size: .92rem; color: var(--ink-2); }

/* ---------------------------------------------------------------- Paper tracker */
.tracker { margin-bottom: 64px; }
.tracker-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 14px 0 0; font-size: .92rem; }
.tracker-links a { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; text-decoration: none; }
.tracker-links a:hover { text-decoration: underline; }
.tracker-links .icon, .section-note .icon { width: 16px; height: 16px; }
.tracker-toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 10px; }
.tracker-search {
  flex: 1 1 320px; min-width: 0; display: flex; align-items: center; gap: 10px;
  padding: 0 14px; height: 46px; border-radius: 12px;
  background: var(--bg-elev); border: 1px solid var(--line); color: var(--ink-3);
}
.tracker-search:focus-within, .tracker-select select:focus-visible {
  border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); outline: 0;
}
.tracker-search input { flex: 1; min-width: 0; height: 100%; border: 0; outline: 0; background: transparent; font: inherit; color: var(--ink); }
.tracker-select select {
  height: 46px; max-width: 100%; padding: 0 12px; border-radius: 12px; font: inherit; font-size: .92rem;
  background: var(--bg-elev); color: var(--ink); border: 1px solid var(--line);
}
.tracker-select { flex: 0 1 auto; min-width: 0; }
.tracker-reset { height: 46px; padding-block: 0; }
.tracker-status { font-size: .9rem; color: var(--ink-3); margin: 6px 0 14px; }

.paper-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.paper { padding: 16px 18px; border-radius: 12px; background: var(--bg-elev); border: 1px solid var(--line); min-width: 0; }
.paper-meta { display: flex; flex-wrap: wrap; gap: 4px 14px; font-family: var(--font-mono); font-size: .76rem; color: var(--ink-3); }
.paper-meta a { color: inherit; text-decoration: none; }
.paper-meta a:hover { color: var(--accent); text-decoration: underline; }
.paper-title { font-size: 1.04rem; line-height: 1.4; margin: 6px 0 4px; overflow-wrap: anywhere; }
.paper-title a { color: var(--ink); text-decoration: none; }
.paper-title a:hover { color: var(--accent); text-decoration: underline; }
.paper-authors { margin: 0; font-size: .88rem; color: var(--ink-2); line-height: 1.5; }
.paper-authors a { color: inherit; text-decoration: none; }
.paper-authors a:hover { color: var(--accent); text-decoration: underline; }
.paper-topics { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 10px 0 0; padding: 0; }
.topic-chip {
  display: inline-block; font-size: .76rem; line-height: 1.2; padding: .35em .7em; border-radius: 999px;
  text-decoration: none; color: var(--ink-2);
  border: 1px solid color-mix(in srgb, var(--fam) 45%, var(--line));
  background: color-mix(in srgb, var(--fam) 9%, var(--bg-elev));
}
.topic-chip:hover { color: var(--ink); border-color: var(--fam); }
.paper-abstract { margin-top: 8px; font-size: .9rem; }
.paper-abstract summary { cursor: pointer; color: var(--ink-3); width: max-content; font-size: .84rem; }
.paper-abstract summary:hover { color: var(--ink); }
.paper-abstract p { margin: 8px 0 0; color: var(--ink-2); line-height: 1.6; overflow-wrap: anywhere; }
.paper-list-compact .paper { padding: 12px 14px; }
.paper-list-compact .paper-title { font-size: .98rem; }
.tracker-more { display: flex; justify-content: center; margin-top: 16px; }
.tracker-more .btn[hidden] { display: none; }
.tracker-note { display: flex; gap: 16px; padding: 20px 22px; margin-top: 40px; align-items: flex-start; }
.tracker-note .icon { color: var(--accent); flex: none; margin-top: 3px; }
.tracker-note h2 { font-size: 1.08rem; margin-bottom: .4em; }
.tracker-note p { margin: 0; color: var(--ink-2); font-size: .94rem; }
.section-note { color: var(--ink-2); font-size: .94rem; }
.section-note a { display: inline-flex; align-items: center; gap: 4px; font-weight: 600; }

/* authors */
.author-search-box { max-width: 560px; margin-bottom: 28px; }
.author-results { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 4px; font-size: .94rem; }
.author-top h2, .author-columns h2 { font-size: 1.2rem; }
.author-top-list { columns: 3 220px; column-gap: 32px; padding-left: 1.5em; font-size: .92rem; }
.author-top-list li { break-inside: avoid; margin-bottom: 4px; }
.author-view[hidden], .author-top[hidden] { display: none; }
.author-columns { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 40px; }
.author-aside ul { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 6px; font-size: .9rem; }
.author-note { font-size: .86rem; margin-top: 32px; }
@media (max-width: 900px) { .author-columns { grid-template-columns: minmax(0, 1fr); } }

/* weekly digest */
.weekly { margin-bottom: 64px; }
.weekly-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.weekly-nav a { padding: .4em .8em; border-radius: 999px; border: 1px solid var(--line); background: var(--bg-elev); font-size: .86rem; text-decoration: none; color: var(--ink-2); }
.weekly-nav a:hover { color: var(--ink); border-color: var(--ink-3); }
.weekly-week { margin-bottom: 48px; scroll-margin-top: calc(var(--header-h) + 16px); }
.weekly-week > h2 { font-size: 1.35rem; padding-top: 16px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
.weekly-week > h2 .muted { font-size: .9rem; font-weight: 400; }
.weekly-family { display: flex; align-items: center; gap: 10px; font-size: 1.02rem; margin: 26px 0 10px; color: var(--ink-2); }
.weekly-family .fam-dot { background: var(--fam); }

/* ---------------------------------------------------------------- Research groups */
.groups { margin-bottom: 64px; }
.groups { margin-bottom: 0; }
.groups-below { margin-top: 28px; margin-bottom: 64px; }
.groups-map {
  height: calc(100vh - var(--header-h) - 24px); max-height: 940px; min-height: 380px; width: 100%; margin: 8px 0 0;
  background: var(--bg); border-block: 1px solid var(--line); position: relative; z-index: 0;
}
.groups-map-fallback { padding: 20px; }
.groups-map.leaflet-container, .leaflet-container { font: inherit; background: var(--bg); }
.leaflet-container .leaflet-control-attribution { background: color-mix(in srgb, var(--bg-elev) 85%, transparent); color: var(--ink-3); font-size: .7rem; }
.leaflet-container .leaflet-control-attribution a { color: var(--ink-2); }
.leaflet-bar a { background: var(--bg-elev); color: var(--ink); border-bottom-color: var(--line); }
.leaflet-bar a:hover { background: var(--bg-sunken); }
.group-dot { border-radius: 50%; background: var(--accent); border: 2px solid var(--bg-elev); box-shadow: 0 0 0 1px var(--accent), 0 2px 6px rgba(0,0,0,.25); }
.group-cluster { display: grid; place-items: center; border-radius: 50%; background: color-mix(in srgb, var(--accent) 22%, transparent); }
.group-cluster span {
  display: grid; place-items: center; width: calc(100% - 8px); height: calc(100% - 8px); border-radius: 50%;
  background: var(--accent); color: var(--accent-ink); font-weight: 600; font-size: .8rem;
}
.leaflet-popup-content { margin: 12px 14px; font-size: .86rem; line-height: 1.45; }
.leaflet-popup-content p { margin: 0 0 4px; }
.map-pop-title { font-family: var(--font-display); font-weight: 600; font-size: .98rem; }
.map-pop-meta { color: #3a4466; }
.map-pop-topics { color: #646c8a; font-size: .8rem; }
.group-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: 12px; }
.group-card { padding: 16px 18px; }
.group-card[hidden] { display: none; }
.group-card-title { font-size: 1.05rem; margin: 0 0 4px; }
.group-card-title a { color: var(--ink); text-decoration: none; }
.group-card-title a:hover { color: var(--accent); text-decoration: underline; }
.group-card-meta { margin: 0; font-size: .88rem; color: var(--ink-2); }
.group-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); gap: 12px 28px; margin: 20px 0 0; }
.group-facts dt { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.group-facts dd { margin: 2px 0 0; color: var(--ink); overflow-wrap: anywhere; }
.group-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 48px; padding-top: 28px; margin-bottom: 64px; }
.group-main h2 { font-size: 1.3rem; }
.group-main section + section { margin-top: 40px; }
.group-topics { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 14px; font-size: .9rem; }
.group-check { display: flex; gap: 12px; padding: 16px; font-size: .88rem; color: var(--ink-2); }
.group-check .icon { color: var(--st-live); flex: none; }
.group-check p { margin: 0; }
.group-aside a { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; }
.group-aside .icon { width: 18px; height: 18px; }
@media (max-width: 900px) { .group-layout { grid-template-columns: minmax(0, 1fr); gap: 24px; } }

/* home: optimal control and the circuit model */
.pulses-circuits { padding-block: 24px 8px; }
.pc-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 8px; }
.pc-card { padding: 22px 24px; }
.pc-card h3 { font-size: 1.2rem; margin-bottom: .4em; }
.pc-card h4 { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); margin: 16px 0 6px; }
.pc-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font-size: .94rem; color: var(--ink-2); }
.pc-list li { position: relative; padding-left: 22px; line-height: 1.5; }
.pc-list li::before { position: absolute; left: 0; top: 0; font-weight: 700; }
.pc-pro li::before { content: "+"; color: var(--st-live); }
.pc-con li::before { content: "−"; color: var(--st-building); }
.pc-more { margin-top: 14px; color: var(--ink-2); font-size: .94rem; }
@media (max-width: 800px) { .pc-grid { grid-template-columns: minmax(0, 1fr); } }

/* ---------------------------------------------------------------- Open problems */
.status-open { --st: var(--accent); }
.status-partial { --st: var(--st-building); }
.status-solved { --st: var(--st-done); }
.problems { margin-bottom: 64px; }
.problem-filter { display: flex; flex-wrap: wrap; gap: 4px; padding: 3px; border-radius: 12px; background: var(--bg-elev); border: 1px solid var(--line); }
.problem-filter-btn {
  height: 38px; padding: 0 12px; border: 0; border-radius: 9px; background: transparent; cursor: pointer;
  font: inherit; font-size: .9rem; color: var(--ink-2); display: inline-flex; align-items: center; gap: 8px;
}
.problem-filter-btn > span:last-child { font-family: var(--font-mono); font-size: .76rem; color: var(--ink-3); }
.problem-filter-btn .status { font-size: .7rem; }
.problem-filter-btn:hover { color: var(--ink); background: var(--bg-sunken); }
.problem-filter-btn[aria-pressed="true"] { color: var(--ink); background: var(--bg-sunken); box-shadow: inset 0 0 0 1px var(--line-strong); }
.problem-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.problem-card { padding: 18px 20px; min-width: 0; }
.problem-card[hidden] { display: none; }
.problem-card-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; }
.problem-draft { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.problem-card-title { font-size: 1.15rem; line-height: 1.35; margin: 8px 0 6px; }
.problem-card-title a { color: var(--ink); text-decoration: none; }
.problem-card-title a:hover { color: var(--accent); text-decoration: underline; }
.problem-card-question { margin: 0; color: var(--ink-2); font-size: .95rem; line-height: 1.6; overflow-wrap: anywhere; }
.problem-topics { margin-top: 16px; }
.problem-question {
  margin: 0 0 36px; padding: 18px 22px; border-radius: var(--radius);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-elev));
}
.problem-question h2 {
  font-family: var(--font-mono); font-size: .72rem; font-weight: 500; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 8px;
}
.problem-question p { margin: 0; font-size: 1.08rem; line-height: 1.65; color: var(--ink); }
.topic-problems { padding-left: 1.2em; display: grid; gap: 8px; color: var(--ink-2); }
.topic-problems a { font-weight: 600; margin-right: 8px; }

/* ---------------------------------------------------------------- Resources */
.res-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.res-nav a {
  padding: .45em .9em; border-radius: 999px; border: 1px solid var(--line); background: var(--bg-elev);
  color: var(--ink-2); text-decoration: none; font-size: .9rem; font-weight: 500;
}
.res-nav a:hover { color: var(--ink); border-color: var(--line-strong); }
.resources { margin-bottom: 64px; }
.res-section { padding-top: 28px; }
.res-section + .res-section { margin-top: 36px; border-top: 1px solid var(--line); }
.res-section > h2 { font-size: 1.6rem; scroll-margin-top: calc(var(--header-h) + 16px); }
.res-group { font-size: 1.08rem; margin: 28px 0 12px; }
.sw-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 12px; }
.sw-card { padding: 16px 18px; min-width: 0; display: flex; flex-direction: column; }
.sw-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 12px; }
.sw-name { font-family: var(--font-display); font-weight: 600; font-size: 1.04rem; color: var(--ink); text-decoration: none; }
.sw-name:hover { color: var(--accent); text-decoration: underline; }
.sw-lang { font-family: var(--font-mono); font-size: .74rem; color: var(--ink-3); }
.sw-what { margin: 6px 0 0; font-size: .9rem; color: var(--ink-2); line-height: 1.5; }
.sw-refs { margin: 8px 0 0; display: grid; gap: 4px; }
.sw-refs .ref { font-size: .8rem; }
.sw-card .paper-topics { margin-top: auto; padding-top: 10px; }
.glossary { margin: 0; display: grid; gap: 4px; }
.glossary > div { padding: 12px 0; border-bottom: 1px solid var(--line); scroll-margin-top: calc(var(--header-h) + 16px); }
.glossary > div:target { background: color-mix(in srgb, var(--accent) 8%, transparent); border-radius: 8px; padding-inline: 10px; }
.glossary dt { font-family: var(--font-display); font-weight: 600; color: var(--ink); }
.glossary dd { margin: 4px 0 0; color: var(--ink-2); line-height: 1.6; }
.gl-links { display: block; margin-top: 4px; font-size: .86rem; color: var(--ink-3); }
.timeline { list-style: none; margin: 16px 0 0; padding: 0; position: relative; }
.timeline::before { content: ""; position: absolute; left: 3.95rem; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.timeline li { display: grid; grid-template-columns: 3.2rem minmax(0, 1fr); gap: 0 1.6rem; padding: 0 0 22px; position: relative; }
.timeline li::before {
  content: ""; position: absolute; left: calc(3.95rem - 4px); top: 7px; width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 3px var(--bg);
}
.tl-year { font-family: var(--font-mono); font-weight: 600; color: var(--ink); text-align: right; padding-top: 1px; }
.tl-body { padding-left: .6rem; }
.tl-body p { margin: 0 0 6px; color: var(--ink); line-height: 1.55; }
.tl-body .ref { font-size: .82rem; margin-top: 2px; }