:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --accent-ink: #1c5cab;
  --context: #c3c2b7;
  --wash: #f0efec;
  --seq-100: #cde2fb; --seq-200: #9ec5f4; --seq-300: #6da7ec; --seq-400: #3987e5;
  --seq-500: #256abf; --seq-600: #184f95; --seq-700: #0d366b;
  --land: #e1e0d9;
  --notice: #fdf3dc;
  --notice-ink: #6b4d00;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --page: #0d0d0d; --surface: #1a1a19; --ink: #f0efec; --ink-2: #c3c2b7;
    --grid: #2c2c2a; --axis: #383835; --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5; --accent-ink: #86b6ef; --context: #4a4a46; --wash: #262624;
    --seq-100: #104281; --seq-200: #184f95; --seq-300: #1c5cab; --seq-400: #256abf;
    --seq-500: #3987e5; --seq-600: #6da7ec; --seq-700: #9ec5f4;
    --land: #2c2c2a; --notice: #2e2716; --notice-ink: #f0d58c;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d; --surface: #1a1a19; --ink: #f0efec; --ink-2: #c3c2b7;
  --grid: #2c2c2a; --axis: #383835; --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5; --accent-ink: #86b6ef; --context: #4a4a46; --wash: #262624;
  --seq-100: #104281; --seq-200: #184f95; --seq-300: #1c5cab; --seq-400: #256abf;
  --seq-500: #3987e5; --seq-600: #6da7ec; --seq-700: #9ec5f4;
  --land: #2c2c2a; --notice: #2e2716; --notice-ink: #f0d58c;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--page); color: var(--ink); line-height: 1.55; font-size: 16px; }
a { color: var(--accent-ink); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

header.site { padding: 0; }
header.site .top { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; padding: 28px 0 12px; }
header.site h1 { font-size: 1.6rem; margin: 0; letter-spacing: -0.01em; }
header.site p.lede { margin: 4px 0 0; color: var(--ink-2); max-width: 46em; }
.theme-toggle { background: none; border: 1px solid var(--border); color: var(--ink-2); border-radius: 8px;
  padding: 6px 10px; cursor: pointer; font: inherit; font-size: 0.85rem; white-space: nowrap; }

header.site .top > div:first-child { flex: 1 1 auto; min-width: 0; }
.tiles { display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; flex: 0 0 260px; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 8px 14px; }
.tile .value { font-size: 1.4rem; font-weight: 600; line-height: 1.3; }
.tile .label { color: var(--ink-2); font-size: 0.85rem; }
.nowrap { white-space: nowrap; }
@media (max-width: 720px) {
  header.site .top { flex-wrap: wrap; }
  .tiles { flex: 1 1 100%; order: 2; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Menu: a full-width bar at the top of the page */
.menu-bar { background: var(--surface); border-bottom: 1px solid var(--border); }
.menu { display: flex; align-items: center; gap: 12px; }
.menu .theme-toggle { flex: none; }
nav.tabs { display: flex; gap: 0 24px; flex: 1 1 auto; min-width: 0; }
nav.tabs a { padding: 14px 0 12px; color: var(--ink-2); text-decoration: none; border-bottom: 2px solid transparent;
  white-space: nowrap; }
nav.tabs a:hover { color: var(--ink); }
nav.tabs a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }
/* Phones: the menu wraps onto a second row instead of hiding items, and the theme button shows only its value */
@media (max-width: 600px) {
  nav.tabs { flex-wrap: wrap; gap: 0 18px; }
  nav.tabs a { padding: 10px 0 8px; }
  .menu { align-items: flex-start; }
  .menu .theme-toggle { margin-top: 6px; }
  .theme-word { display: none; }
}

main { padding: 24px 0 64px; }
section.tab[hidden] { display: none; }
h2 { font-size: 1.25rem; margin: 0 0 6px; }
h3 { font-size: 1.05rem; margin: 0 0 4px; }
.secondary { color: var(--ink-2); }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px;
  margin: 0 0 16px; min-width: 0; }
.card .how { color: var(--ink-2); font-size: 0.9rem; margin: 0 0 8px; max-width: 60em; }
.grid-2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
@media (max-width: 860px) { .grid-2 { grid-template-columns: minmax(0, 1fr); } }
.chart { width: 100%; height: 420px; }
.chart.tall { height: 520px; }
.scroll-x { overflow-x: auto; }

/* Explore controls: one row above everything it scopes */
.controls { position: sticky; top: 0; z-index: 5; background: var(--page); padding: 10px 0; margin: -10px 0 12px;
  display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; }
.segmented { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.segmented button { background: var(--surface); border: 0; padding: 7px 12px; font: inherit; font-size: 0.9rem;
  color: var(--ink-2); cursor: pointer; }
.segmented button + button { border-left: 1px solid var(--border); }
.segmented button[aria-pressed="true"] { background: var(--accent); color: #fff; }
select.topic-select { font: inherit; font-size: 0.9rem; padding: 6px 8px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface); color: var(--ink); max-width: 100%; min-width: 0; flex: 1 1 260px; }
.controls label { font-size: 0.85rem; color: var(--ink-2); }

.topic-card .stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 12px 0; }
.topic-card .stat .value { font-size: 1.25rem; font-weight: 600; }
.topic-card .stat .label { font-size: 0.8rem; color: var(--ink-2); }
.topic-card .keywords { font-size: 0.85rem; color: var(--ink-2); }
.topic-card .path { font-size: 0.85rem; color: var(--ink-2); }
.topic-papers h3 { margin-top: 16px; }
ol.paper-list { margin: 0; padding-left: 1.4em; font-size: 0.88rem; line-height: 1.4; }
ol.paper-list li { margin: 0 0 8px; }
ol.paper-list .meta { font-size: 0.8rem; color: var(--ink-2); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.chip { border: 1px solid var(--border); background: var(--wash); color: var(--ink); border-radius: 999px;
  padding: 3px 10px; font: inherit; font-size: 0.8rem; cursor: pointer; }
.linkish { background: none; border: 0; padding: 0; color: var(--accent-ink); font: inherit; cursor: pointer;
  text-decoration: underline; }

/* Newsletter */
.notice { background: var(--notice); color: var(--notice-ink); border-radius: 8px; padding: 8px 12px;
  font-size: 0.88rem; margin: 0 0 16px; }
article.issue { max-width: 46em; }
article.issue h2 { font-size: 1.5rem; }
article.issue h3 { margin-top: 22px; }
article.issue .topic-tag { font-size: 0.8rem; color: var(--ink-2); }
.archive { list-style: none; padding: 0; margin: 0; }
.archive li { padding: 8px 0; border-bottom: 1px solid var(--border); }
.archive button { text-align: left; }
.empty { color: var(--ink-2); padding: 24px; text-align: center; }

/* Tables */
table { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--grid); vertical-align: top; }
th { color: var(--ink-2); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
tr.selected td { background: var(--wash); }
details summary { cursor: pointer; color: var(--ink-2); font-size: 0.9rem; }

.methods { max-width: 50em; }
.methods h2 { margin-top: 28px; }
footer.site { border-top: 1px solid var(--border); padding: 20px 0 40px; color: var(--ink-2); font-size: 0.85rem; }
footer.site p { margin: 0 0 4px; }
ul.contact { list-style: none; padding: 0; }
ul.contact li { padding: 2px 0; }
ul.references li { padding: 3px 0; }
p.citation { border-left: 3px solid var(--accent); padding: 4px 0 4px 12px; color: var(--ink-2); }
.grid-2.week-layout { grid-template-columns: minmax(0, 3fr) minmax(0, 1fr); }
@media (max-width: 860px) { .grid-2.week-layout { grid-template-columns: minmax(0, 1fr); } }
.grid-2.topics-layout { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); }
@media (max-width: 860px) { .grid-2.topics-layout { grid-template-columns: minmax(0, 1fr); } }
/* Side by side, the topic panel takes the chart's height (its content doesn't size the row) and scrolls */
@media (min-width: 861px) { .topics-layout .topic-card { contain: size; overflow-y: auto; } }
#sunburst { height: auto; aspect-ratio: 1 / 1; max-height: 680px; }

/* Topic search: a combobox whose results drop down over the page */
.search { position: relative; flex: 1 1 280px; min-width: 0; }
input.topic-search { width: 100%; font: inherit; font-size: 0.9rem; padding: 6px 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface); color: var(--ink); }
input.topic-search:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.search-panel { position: absolute; left: 0; right: 0; top: calc(100% + 4px); z-index: 20; background: var(--surface);
  border: 1px solid var(--border); border-radius: 10px; box-shadow: 0 6px 20px rgba(0, 0, 0, 0.14);
  max-height: min(70vh, 520px); overflow-y: auto; }
.search-panel[hidden] { display: none; }
.search-status { font-size: 0.8rem; color: var(--ink-2); padding: 8px 12px 6px; }
.search-results { list-style: none; margin: 0; padding: 0; }
.search-results li { padding: 8px 12px; border-top: 1px solid var(--grid); cursor: pointer; }
.search-results li[aria-selected="true"], .search-results li:hover { background: var(--wash); }
.search-results .name { font-weight: 600; font-size: 0.92rem; }
.search-results .meta { font-size: 0.78rem; color: var(--ink-2); }
.search-results .desc { font-size: 0.84rem; color: var(--ink-2); display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden; }