/* One stylesheet for every page (owner: ui). Dark, in the spirit of Obsidian's graph view.
   The tokens on :root are Contract 4: other files only read them. Motion: transform and opacity
   only, strong ease-out, under 300 ms for UI; view transitions carry the page changes. */

/* The opt-in for page-to-page view transitions is inline in base.html: the browser reads it when
   <body> starts, which can be before this file has loaded. */

:root {
  color-scheme: dark;
  --bg: #111115;
  --surface: #191920;
  --surface-2: #23232d;
  --border: #30303c;
  --text: #ececf2;
  --muted: #a3a3b3;
  --accent: #a48cff;
  --accent-ink: #130f24;

  /* relation colours: spread in hue and in lightness; line style and labels carry them too */
  --rel-main: #ffd166;
  --rel-mutual: #a48cff;
  --rel-out: #4cc9f0;
  --rel-in: #ff8f5a;
  --rel-related: #8d93a5;
  --ring: #ff6b6b;
  --added: #3ddc97;
  --removed: #ff7b8a;

  --radius: 12px;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --dur-fast: 140ms;
  --dur: 220ms;
  --dur-slow: 420ms;
  --font: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "Cascadia Code", Consolas, "SF Mono", Menlo, monospace;

  /* extras for the ui pages (not part of the contract) */
  --font-serif: "Iowan Old Style", "Sitka Text", "Sitka", Charter, Georgia, "Times New Roman", serif;
  --warn: #ffb454;
  --accent-soft: color-mix(in srgb, var(--accent) 16%, transparent);
  --glass: color-mix(in srgb, var(--surface) 76%, transparent);
  --shadow: 0 10px 30px -12px rgb(0 0 0 / .65), 0 2px 6px -2px rgb(0 0 0 / .4);
  --page: 72rem;
}

/* ---- base ----------------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: clamp(100%, 93% + 0.22vw, 112.5%); -webkit-text-size-adjust: 100%; scrollbar-gutter: stable; }
body { margin: 0; min-height: 100dvh; display: flex; flex-direction: column; background: var(--bg); color: var(--text);
  font: 1rem/1.55 var(--font); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: transparent; }
body::before { content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;      /* static glow, never animated */
  background:
    radial-gradient(60rem 28rem at 50% -8rem, color-mix(in srgb, var(--accent) 13%, transparent), transparent 70%),
    radial-gradient(circle at 1px 1px, rgb(255 255 255 / .045) 1px, transparent 1.5px) 0 0 / 28px 28px; }
main { flex: 1; width: 100%; max-width: var(--page); margin: 0 auto; padding: 1.5rem 1.25rem 3.5rem; }
a { color: var(--accent); text-underline-offset: .18em; text-decoration-thickness: 1px; }
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
::selection { background: color-mix(in srgb, var(--accent) 40%, transparent); }
.sr { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: 1rem; top: -4rem; z-index: 50; padding: .5rem .9rem; border-radius: 8px;
  background: var(--accent); color: var(--accent-ink); font-weight: 600; text-decoration: none; }
.skip:focus { top: .6rem; }
.kicker { color: var(--muted); font-size: .75rem; font-weight: 600; letter-spacing: .09em; text-transform: uppercase; }
.num { font-variant-numeric: tabular-nums; }

/* ---- top bar and footer --------------------------------------------------------------------- */
.topbar { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 1rem; min-height: 3.25rem;
  padding: .5rem 1.25rem; background: color-mix(in srgb, var(--bg) 70%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.5); backdrop-filter: blur(14px) saturate(1.5);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 60%, transparent); view-transition-name: topbar; }
.brand { display: inline-flex; align-items: center; gap: .55rem; flex: none; color: var(--text); font-weight: 650;
  letter-spacing: -.01em; text-decoration: none; }
.brand svg { color: var(--accent); }
.back { display: inline-flex; align-items: center; gap: .45rem; min-width: 0; max-width: min(34rem, 60vw); margin-left: auto;
  padding: .35rem .8rem .35rem .6rem; border: 1px solid var(--border); border-radius: 99px; background: var(--surface);
  color: var(--muted); font-size: .875rem; text-decoration: none;
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) ease, color var(--dur-fast) ease; }
.back span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); }
.back:active { transform: scale(.97); }
footer { width: 100%; max-width: var(--page); margin: 0 auto; padding: 1rem 1.25rem 1.5rem; color: var(--muted);
  font-size: .8125rem; border-top: 1px solid color-mix(in srgb, var(--border) 60%, transparent); }
footer a { color: inherit; }

/* ---- controls ------------------------------------------------------------------------------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .4rem; min-height: 2.25rem; padding: .4rem .85rem;
  border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2); color: var(--text);
  font: 500 .875rem/1.2 var(--font); text-decoration: none; white-space: nowrap; cursor: pointer; user-select: none;
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) ease, background-color var(--dur-fast) ease; }
.btn:active { transform: scale(.97); }
.btn-primary { border-color: var(--accent); background: var(--accent); color: var(--accent-ink); font-weight: 650; }
.btn-quiet { border-color: transparent; background: transparent; color: var(--accent); padding-inline: .5rem; }
.linkish { padding: 0; border: 0; background: none; color: var(--accent); font: inherit; font-size: .875rem; cursor: pointer;
  text-decoration: underline; text-underline-offset: .18em; }
.pill { display: inline-flex; align-items: center; gap: .35rem; padding: .12rem .6rem; border: 1px solid var(--border);
  border-radius: 99px; color: var(--muted); font-size: .75rem; font-weight: 500; letter-spacing: .02em; text-transform: none; white-space: nowrap; }
.pill-accent { border-color: color-mix(in srgb, var(--accent) 45%, transparent); color: var(--accent); background: var(--accent-soft); }
.pill-warn { border-color: color-mix(in srgb, var(--warn) 45%, transparent); color: var(--warn); }
.pill-sample { display: inline-block; max-width: min(100%, 24rem); overflow: hidden; text-overflow: ellipsis; vertical-align: middle; cursor: help; }
@media (hover: hover) and (pointer: fine) {
  .btn:hover { border-color: color-mix(in srgb, var(--accent) 70%, var(--border)); }
  .btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, white); }
  .btn-quiet:hover { background: var(--accent-soft); border-color: transparent; }
  .back:hover { border-color: var(--accent); color: var(--text); }
  .chip:hover { border-color: color-mix(in srgb, var(--accent) 70%, var(--border)); background: var(--surface-2); }
  .rel:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
}

/* ---- ask page: landing ---------------------------------------------------------------------- */
.ask { display: grid; justify-items: center; padding-top: clamp(1.5rem, 11vh, 6.5rem); }
.ask > * { width: 100%; }
.ask:not([data-state="landing"]) { padding-top: .25rem; }
.hero { max-width: 46rem; margin-bottom: 2rem; text-align: center; }
.hero h1 { margin: .9rem 0 1rem; font: 500 clamp(2.1rem, 1.3rem + 3.2vw, 3.5rem)/1.06 var(--font-serif);
  letter-spacing: -.022em; text-wrap: balance; }
.hero h1 em { font-style: italic; color: var(--accent); }
.hero p:not(.kicker) { max-width: 36rem; margin: 0 auto; color: var(--muted); font-size: 1.0625rem; text-wrap: pretty; }
.ask:not([data-state="landing"]) .hero { display: none; }

.ask-form { max-width: 46rem; view-transition-name: ask-form; }
.ask-box { display: flex; align-items: center; gap: .5rem; padding: .4rem .4rem .4rem 1rem; border: 1px solid var(--border);
  border-radius: 16px; background: var(--surface); box-shadow: var(--shadow);
  transition: border-color var(--dur) ease; }
.ask-box:focus-within { border-color: var(--accent); outline: 3px solid var(--accent-soft); }
.ask-box svg { flex: none; color: var(--muted); }
.ask-box input { flex: 1; min-width: 0; height: 2.9rem; border: 0; background: none; color: var(--text);
  font: 1.125rem var(--font); outline: none; }
.ask-box input::placeholder { color: color-mix(in srgb, var(--muted) 75%, transparent); }
.ask-box .btn { min-height: 2.75rem; padding-inline: 1.15rem; border-radius: 11px; font-size: 1rem; }
.ask-box kbd { font: .75rem var(--font-mono); opacity: .7; }
.ask-opts { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: .4rem .6rem; min-height: 2.4rem;
  margin-top: .6rem; color: var(--muted); font-size: .875rem; }
.ask-opts input { height: 2rem; padding: 0 .5rem; border: 1px solid var(--border); border-radius: 8px; background: var(--surface);
  color: var(--text); font: .875rem var(--font); font-variant-numeric: tabular-nums; }
.ask-opts input:not(:valid), .ask-opts input:placeholder-shown { color: var(--muted); }

#ask-error { max-width: 46rem; }
.alert { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .5rem 1rem; margin-top: .9rem; padding: .7rem 1rem;
  border: 1px solid color-mix(in srgb, var(--removed) 50%, var(--border)); border-radius: var(--radius);
  background: color-mix(in srgb, var(--removed) 9%, var(--surface)); animation: rise var(--dur) var(--ease-out) both; }
.alert b { color: var(--removed); }

.examples { max-width: 52rem; margin-top: 2.25rem; text-align: center; }
.ask[data-state="loading"] .examples, .ask[data-state="answer"] .examples { display: none; }
/* the loop: constant motion, so linear; paused while the pointer or focus is on it so a chip can be read and hit */
.marquee { margin-top: .8rem; overflow: hidden; padding-block: .25rem;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.examples ul { display: flex; width: max-content; animation: marquee 60s linear infinite; }
.examples li { margin-right: .6rem; }  /* margin, not gap: the gap after the last chip keeps -50% exact */
.marquee:hover ul, .marquee:focus-within ul { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }
.chip { display: inline-flex; align-items: center; gap: .55rem; max-width: 100%; padding: .55rem .95rem; border: 1px solid var(--border);
  border-radius: 99px; background: var(--surface); color: var(--text); font: .9375rem/1.3 var(--font); text-align: left; cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) ease, background-color var(--dur-fast) ease; }
.chip:active { transform: scale(.97); }

/* first paint of the landing page: one short wave, title first */
.ask[data-state="landing"] :is(.hero, .ask-form, .examples) { animation: rise var(--dur-slow) var(--ease-out) both; }
.ask[data-state="landing"] .ask-form { animation-delay: 70ms; }
.ask[data-state="landing"] .examples { animation-delay: 130ms; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }
@keyframes fade { from { opacity: 0; } }

/* ---- ask page: results ---------------------------------------------------------------------- */
.results { display: none; max-width: 50rem; min-height: 62vh; margin-top: 1.5rem; }
.ask[data-state="loading"] .results, .ask[data-state="answer"] .results { display: block; }
.status { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem 1.4rem; min-height: 2.25rem; margin-bottom: 1rem;
  padding-bottom: .75rem; border-bottom: 1px solid var(--border); color: var(--muted); font-size: .9375rem; }
.status > * { animation: fade var(--dur) ease both; }
.step { display: inline-flex; align-items: center; gap: .5rem; opacity: .45; transition: opacity var(--dur) ease; }
.step.is-active { opacity: 1; color: var(--text); }
.step.is-done { opacity: .8; }
.step i { position: relative; flex: none; width: 1rem; height: 1rem; border-radius: 50%; border: 2px solid var(--border); }
.step.is-active i { border-top-color: var(--accent); animation: spin .7s linear infinite; }
.step.is-done i { border-color: var(--accent); background: var(--accent); }
.step.is-done i::after { content: ""; position: absolute; left: 3.5px; top: 1px; width: 4px; height: 7px;
  border: solid var(--accent-ink); border-width: 0 2px 2px 0; transform: rotate(45deg); }
@keyframes spin { to { transform: rotate(1turn); } }

.answer-wrap { position: relative; }                  /* the source popover is placed inside it */
.answer { min-width: 0; }
.answer-text { font: 1.3rem/1.62 var(--font-serif); text-wrap: pretty; }
.answer-part + .answer-part { margin-top: 1.6rem; }
.answer-part h2 { margin-bottom: .45rem; }
.sent { border-radius: 4px; -webkit-box-decoration-break: clone; box-decoration-break: clone;
  transition: background-color var(--dur-fast) ease; }
.sent.is-hl { background: var(--accent-soft); }
.sent.uncited { text-decoration: underline dotted var(--warn); text-decoration-thickness: 2px; text-underline-offset: .28em; }
.tag-uncited { margin-left: .4em; vertical-align: .2em; font-family: var(--font); }
.cite { position: relative; display: inline-grid; place-items: center; min-width: 1.5rem; height: 1.5rem; margin: 0 .1em 0 .2em; padding: 0 .3rem;
  vertical-align: .22em; border: 1px solid color-mix(in srgb, var(--accent) 50%, transparent); border-radius: 99px;
  background: var(--accent-soft); color: var(--accent); font: 650 .75rem/1 var(--font); font-variant-numeric: tabular-nums; cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out), background-color var(--dur-fast) ease, color var(--dur-fast) ease; }
.cite::before { content: ""; position: absolute; inset: -.45rem; }                     /* larger hit area */
.cite:active { transform: scale(.92); }
.cite.is-hl, .cite[aria-expanded="true"] { background: var(--accent); color: var(--accent-ink); }

/* the source popover: a short preview on hover/focus of a marker, the full card on click */
.cite-pop { position: absolute; z-index: 30; width: min(23rem, 100%); padding: .75rem .9rem .7rem;
  border: 1px solid color-mix(in srgb, var(--border) 80%, var(--accent)); border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface-2) 94%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(1.4); backdrop-filter: blur(16px) saturate(1.4); box-shadow: var(--shadow); }
.cite-pop[data-mode="card"] { width: min(29rem, 100%); padding: .95rem 1.05rem .7rem; }
.cite-pop[data-mode="peek"] { cursor: default; }
.cite-pop:focus { outline: none; }
.cite-pop:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.cite-pop[data-era="then"] { border-left: 3px solid var(--warn); }
/* a small arrow pointing at the marker (--arrow = its x inside the popover) */
.cite-pop::before { content: ""; position: absolute; left: calc(var(--arrow, 50%) - 6px); width: 10px; height: 10px; rotate: 45deg;
  background: inherit; border: inherit; border-width: 0; }
.cite-pop[data-side="below"]::before { top: -6px; border-top-width: 1px; border-left-width: 1px; }
.cite-pop[data-side="above"]::before { bottom: -6px; border-bottom-width: 1px; border-right-width: 1px; }
.cite-pop header { display: flex; gap: .65rem; align-items: flex-start; }
.cite-pop header > div { flex: 1; min-width: 0; }
.cite-pop header .pill { flex: none; margin-top: .15rem; }
.cite-pop .n { flex: none; display: grid; place-items: center; min-width: 1.6rem; height: 1.6rem; border-radius: 99px; background: var(--accent-soft);
  color: var(--accent); font: 650 .75rem/1 var(--font); font-variant-numeric: tabular-nums; }
.cite-pop h3 { font: 600 1.0625rem/1.25 var(--font-serif); letter-spacing: -.005em; overflow-wrap: anywhere; width: fit-content; }
.src-heading { color: var(--muted); font-size: .8125rem; }
.src-text { white-space: pre-line; margin-top: .55rem; color: color-mix(in srgb, var(--text) 86%, var(--muted)); font-size: .9375rem; line-height: 1.55; overflow-wrap: anywhere; }
.cite-pop[data-mode="card"] .src-text:not(.clamp) { max-height: 16rem; overflow: hidden auto; overscroll-behavior: contain; }
.cite-pop[data-mode="card"] { overflow: hidden auto; overscroll-behavior: contain; }
.clamp { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; line-clamp: 3; overflow: hidden; }
.cite-pop[data-mode="card"] .clamp { -webkit-line-clamp: 6; line-clamp: 6; }
.cite-pop .clamp-2 { -webkit-line-clamp: 2; line-clamp: 2; }
.pop-hint { margin-top: .45rem; color: var(--muted); font-size: .75rem; }
.cite-pop .more { margin-top: .2rem; }
.src-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .35rem .6rem; margin-top: .6rem; color: var(--muted); font-size: .8125rem; }
.src-meta:empty { display: none; }
.src-actions { display: flex; flex-wrap: wrap; gap: .15rem; margin: .45rem -.5rem 0; padding-top: .45rem;
  border-top: 1px solid color-mix(in srgb, var(--border) 70%, transparent); }

/* skeleton: the same boxes as the answer, a light sweep across each line */
.sk { position: relative; overflow: hidden; height: .95rem; margin: .55rem 0; border-radius: 6px; background: var(--surface-2); }
.sk::after { content: ""; position: absolute; inset: 0; transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgb(255 255 255 / .09), transparent); animation: sweep 1.5s var(--ease-in-out) infinite; }
.answer .sk { height: 1.25rem; margin: .85rem 0; }
@keyframes sweep { to { transform: translateX(100%); } }

/* arrival: sentences one after another (fade, they are inline), then the rest */
.is-arriving .sent, .is-arriving .answer-part h2 { animation: fade 380ms ease both; animation-delay: calc(var(--i, 0) * 90ms); }
.is-arriving .diffs { animation: rise 320ms var(--ease-out) 300ms both; }
.related.is-arriving { animation: fade 300ms ease both; }

/* then vs now: the word diff */
.diffs { margin-top: 2.25rem; }
.diffs > h2 { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1rem; margin-bottom: .75rem; }
.diff-key { display: inline-flex; gap: .75rem; font-size: .8125rem; font-weight: 400; letter-spacing: 0; text-transform: none; }
.diff { padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.diff + .diff { margin-top: .8rem; }
.diff-head { display: flex; flex-wrap: wrap; align-items: center; gap: .3rem .9rem; margin-bottom: .7rem; color: var(--muted); font-size: .875rem; }
.diff-head strong { flex-basis: 100%; color: var(--text); font: 600 1.0625rem var(--font-serif); }
.diff-head .pill { margin-left: auto; }
.diff-body { font: 1.0625rem/1.7 var(--font-serif); overflow-wrap: anywhere; }
.diff-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.diff-cols h4 { margin-bottom: .3rem; }
del, ins { padding: .05em .2em; border-radius: 4px; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
del { background: color-mix(in srgb, var(--removed) 17%, transparent); color: color-mix(in srgb, var(--removed) 55%, var(--text));
  text-decoration: line-through; text-decoration-color: var(--removed); }
ins { background: color-mix(in srgb, var(--added) 15%, transparent); color: color-mix(in srgb, var(--added) 45%, var(--text));
  text-decoration: underline; text-decoration-color: var(--added); text-underline-offset: .22em; }

/* related articles */
.related { margin-top: 2.75rem; }
.related > p { margin: .2rem 0 .9rem; color: var(--muted); font-size: .9375rem; }
.rel-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem; }
.rel { display: flex; align-items: center; gap: 1rem; padding: .8rem .9rem .8rem 1.1rem; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--surface); transition: border-color var(--dur-fast) ease; }
.rel > div { flex: 1; min-width: 0; }
.rel h3 { font: 600 1.0625rem/1.3 var(--font-serif); width: fit-content; }
.rel p { margin-top: .15rem; color: var(--muted); font-size: .875rem; line-height: 1.45; -webkit-line-clamp: 2; line-clamp: 2; }

/* ---- top bar navigation --------------------------------------------------------------------- */
.nav { display: flex; gap: .15rem; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.nav a { flex: none; padding: .35rem .7rem; border-radius: 8px; color: var(--muted); font-size: .875rem; text-decoration: none;
  transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease; }
.nav a[aria-current="page"] { color: var(--text); background: var(--surface-2); }

/* ---- ask page: sources, popover, rewind (added) ---------------------------------------------- */
.scope { display: inline-flex; align-items: center; gap: .4rem; margin-left: .6rem; cursor: pointer; }
.scope input { accent-color: var(--accent); width: 1rem; height: 1rem; margin: 0; }
.status .hint { color: var(--muted); font-size: .875rem; }
.status .slow { display: inline-flex; flex-wrap: wrap; gap: .3rem; color: var(--text); }
.status .slow a { color: var(--accent); }

/* the past version of a source carries amber, everywhere it appears */
.cite[data-era="then"], .src-chip[data-era="then"] .n { border-color: color-mix(in srgb, var(--warn) 55%, transparent);
  background: color-mix(in srgb, var(--warn) 14%, transparent); color: var(--warn); }
.cite[data-era="then"].is-hl, .cite[data-era="then"][aria-expanded="true"] { background: var(--warn); color: var(--accent-ink); }
/* rewind states on markers and chips: a different text that year, or none at all */
.cite[data-rw="changed"], .src-chip[data-rw="changed"] .n { box-shadow: 0 0 0 2px color-mix(in srgb, var(--warn) 70%, transparent); }
.cite[data-rw="absent"], .cite[data-rw="no_article"], .src-chip[data-rw="absent"] .n, .src-chip[data-rw="no_article"] .n {
  border-style: dashed; background: transparent; color: var(--muted); }
.sent { transition: background-color var(--dur-fast) ease, opacity var(--dur) ease; }
.sent.rw-gone { opacity: .38; }

.src-strip { margin-top: 1.6rem; padding-top: 1rem; border-top: 1px solid color-mix(in srgb, var(--border) 70%, transparent); }
.src-strip .chips { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .55rem; }
.src-chip { position: relative; display: inline-flex; align-items: center; gap: .5rem; max-width: 100%; padding: .3rem .7rem .3rem .35rem;
  border: 1px solid var(--border); border-radius: 99px; background: var(--surface); color: var(--text); font: .875rem/1.25 var(--font);
  text-align: left; cursor: pointer; transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) ease, background-color var(--dur-fast) ease; }
.src-chip:active { transform: scale(.97); }
.src-chip .n { flex: none; display: grid; place-items: center; min-width: 1.4rem; height: 1.4rem; border: 1px solid transparent; border-radius: 99px;
  background: var(--accent-soft); color: var(--accent); font: 650 .75rem/1 var(--font); font-variant-numeric: tabular-nums; }
.src-chip .t { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: var(--font-serif); font-weight: 600; }
.src-chip .h { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); max-width: 14rem; }
.src-chip .dot { width: 7px; height: 7px; flex: none; border-radius: 50%; background: transparent; }
.src-chip[data-health="ok"] .dot { background: var(--added); }
.src-chip[data-health="warn"] .dot { background: var(--warn); }
.src-chip.is-hl, .src-chip[aria-expanded="true"] { border-color: var(--accent); background: var(--surface-2); }
.also { margin-top: .6rem; }
.also summary { width: fit-content; color: var(--muted); font-size: .8125rem; cursor: pointer; }
.license { margin-top: .7rem; color: var(--muted); font-size: .75rem; }
.license a { color: inherit; }

/* popover additions */
.cite-pop .clamp-3 { -webkit-line-clamp: 3; line-clamp: 3; }
.cite-pop mark { padding: 0 .1em; border-radius: 3px; background: color-mix(in srgb, var(--accent) 26%, transparent); color: inherit; }
.cite-pop .support { border-radius: 4px; background: color-mix(in srgb, var(--accent) 9%, transparent);
  -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.cite-pop[data-mode="peek"] { cursor: pointer; }
.pop-close { flex: none; display: grid; place-items: center; width: 2rem; height: 2rem; margin: -.35rem -.45rem 0 0; border: 0; border-radius: 8px;
  background: transparent; color: var(--muted); font-size: .9rem; cursor: pointer; transition: background-color var(--dur-fast) ease, color var(--dur-fast) ease; }
.pill-ok { border-color: color-mix(in srgb, var(--added) 45%, transparent); color: var(--added); }
.rw-note { margin-top: .55rem; padding: .45rem .6rem; border-radius: 8px; background: color-mix(in srgb, var(--warn) 10%, transparent);
  color: var(--text); font-size: .8125rem; }
.rw-note[data-state="same"] { background: color-mix(in srgb, var(--added) 10%, transparent); }
.rw-note .diff-key { margin-left: .3rem; }
/* phone: the card is a bottom sheet over a scrim (iOS drawer curve, see showPop) */
.cite-pop[data-sheet] { position: fixed; inset: auto 0 0 0; z-index: 60; width: auto; max-height: min(72dvh, 36rem); overflow: auto;
  overscroll-behavior: contain; padding: 1.1rem 1.1rem calc(.9rem + env(safe-area-inset-bottom)); border-radius: 18px 18px 0 0;
  border-width: 1px 0 0; background: var(--surface-2); }
.cite-pop[data-sheet]::before { left: 50%; top: .45rem; width: 2.5rem; height: 4px; margin-left: -1.25rem; rotate: none; border: 0;
  border-radius: 99px; background: var(--border); }
.cite-pop[data-sheet] header { padding-top: .35rem; }
.cite-scrim { position: fixed; inset: 0; z-index: 55; background: rgb(0 0 0 / .45); }

.rewind { margin: -.25rem 0 1.25rem; padding: .7rem .95rem .55rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.rw-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: .2rem .8rem; }
.rw-year { min-width: 3.2em; font: 600 1.35rem/1 var(--font-serif); color: var(--text); }
.rw-sum { flex: 1 1 16rem; color: var(--muted); font-size: .875rem; }
.rw-track { position: relative; margin-top: .55rem; }
.rw-bars { position: absolute; inset: 0 .5rem auto; display: flex; align-items: flex-end; gap: 2px; height: 1.4rem; pointer-events: none; }
.rw-bars i { flex: 1; height: calc(var(--h) * 100%); min-height: 2px; border-radius: 2px 2px 0 0;
  background: color-mix(in srgb, var(--warn) 55%, var(--surface-2)); opacity: .8; }
.rw-track input { position: relative; width: 100%; margin: 1.2rem 0 0; accent-color: var(--accent); cursor: grab; }
.rw-track input:active { cursor: grabbing; }
.rw-ends { display: flex; align-items: center; justify-content: space-between; gap: .5rem; min-height: 2rem; color: var(--muted); font-size: .75rem; }
.rw-ask { font-size: .8125rem; }
.rewind[data-loading] .rw-sum { color: var(--text); }

/* related: four first, the rest behind "Show all" */
.related:not(.is-all) .rel:nth-child(n+5) { display: none; }
.rel h3 a { color: inherit; text-decoration: none; }
.rel-actions { display: flex; flex-direction: column; align-items: stretch; gap: .25rem; }
.rel-more { margin-top: .6rem; }

@media (hover: hover) and (pointer: fine) {
  .nav a:hover { color: var(--text); }
  .src-chip:hover { border-color: color-mix(in srgb, var(--accent) 60%, var(--border)); }
  .pop-close:hover { background: var(--surface); color: var(--text); }
  .rel h3 a:hover { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .18em; }
}

/* ---- shared page layout: drift, tools, error (added) ---------------------------------- */
.page { max-width: 58rem; margin: 0 auto; padding-top: clamp(.5rem, 4vh, 2rem); }
.page-head { max-width: 44rem; margin-bottom: 1.5rem; animation: rise var(--dur-slow) var(--ease-out) both; }
.page-head h1 { margin: .6rem 0 .7rem; font: 500 clamp(1.9rem, 1.3rem + 2.4vw, 2.9rem)/1.08 var(--font-serif); letter-spacing: -.02em; text-wrap: balance; }
.page-head h1 em { font-style: italic; color: var(--accent); }
.lede { color: var(--muted); font-size: 1.0625rem; text-wrap: pretty; }
.muted, .muted-note { color: var(--muted); }
.muted-note { font-size: .875rem; margin: .5rem 0; }
.tool-loading { display: flex; align-items: center; gap: .6rem; margin: 1rem 0; color: var(--muted); }
.tool-loading i { width: 1rem; height: 1rem; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .7s linear infinite; }

/* segmented control (tabs, radio groups) */
.seg { display: inline-flex; flex-wrap: wrap; gap: .2rem; padding: .25rem; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.seg button { min-height: 2.25rem; padding: .35rem .85rem; border: 0; border-radius: 9px; background: transparent; color: var(--muted);
  font: 500 .9375rem/1.2 var(--font); cursor: pointer; transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out); }
.seg button:active { transform: scale(.97); }
.seg button[aria-selected="true"], .seg button[aria-checked="true"] { background: var(--surface-2); color: var(--text); box-shadow: inset 0 0 0 1px var(--border); }
.seg-sm button { min-height: 2rem; padding: .25rem .7rem; font-size: .8125rem; }

/* cards in result lists arrive with a short stagger */
.results-list { display: grid; gap: .8rem; margin-top: 1rem; }
.card { padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface);
  animation: rise 320ms var(--ease-out) both; animation-delay: calc(min(var(--i, 0), 6) * 50ms); }
.card header { display: flex; flex-wrap: wrap; align-items: baseline; gap: .2rem .7rem; }
.card h3 { font: 600 1.125rem/1.25 var(--font-serif); }
.card h3 a { color: inherit; text-decoration: none; }
.card-link { margin-left: auto; font-size: .8125rem; }
.quote { margin: .55rem 0; font: 1rem/1.6 var(--font-serif); color: color-mix(in srgb, var(--text) 90%, var(--muted)); overflow-wrap: anywhere; }
.quote mark, .flip-text mark { padding: 0 .1em; border-radius: 3px; background: color-mix(in srgb, var(--accent) 26%, transparent); color: inherit; }
.chip-sm { padding: .3rem .7rem; font-size: .8125rem; }
.quick { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; margin: .7rem 0 0; font-size: .875rem; }

/* ---- language drift --------------------------------------------------------------------------- */
:root { --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500; --s5: #d55181; }   /* dataviz palette, dark steps, validated on --surface */
.drift-main { margin-top: 1.25rem; padding: 1.25rem 1.25rem 1rem; border: 1px solid var(--border); border-radius: calc(var(--radius) + 4px); background: var(--surface); }
.drift-intro { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: .8rem 1.5rem; }
.drift-intro h2 { font: 600 1.5rem/1.2 var(--font-serif); }
.drift-intro p { max-width: 36rem; margin-top: .3rem; color: var(--muted); font-size: .9375rem; }
.chart { margin: 1.2rem 0 0; }
.chart-plot { position: relative; border-radius: 8px; }
.chart-plot svg { display: block; width: 100%; height: auto; overflow: visible; font: 12px var(--font); }
.chart .grid line { stroke: color-mix(in srgb, var(--border) 70%, transparent); stroke-width: 1; }
.chart text { fill: var(--muted); font-variant-numeric: tabular-nums; }
.chart .end text { fill: var(--text); font-size: 12.5px; }
.chart .line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; stroke-dasharray: 1; }
.chart .cross line { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 3 3; }
.chart .cross circle { stroke: var(--surface); stroke-width: 2; }
.tip { position: absolute; left: 0; top: 0; z-index: 2; display: grid; gap: .2rem; min-width: 11rem; padding: .55rem .7rem; border: 1px solid var(--border);
  border-radius: 10px; background: color-mix(in srgb, var(--surface-2) 96%, transparent); box-shadow: var(--shadow); font-size: .8125rem; pointer-events: none; }
.tip > b { font-size: .875rem; }
.tip span { display: grid; grid-template-columns: auto 1fr auto auto; align-items: center; gap: .45rem; }
.tip i, .legend i { display: inline-block; width: 9px; height: 9px; border-radius: 50%; }
.tip small { color: var(--muted); }
.legend { display: flex; flex-wrap: wrap; gap: .35rem 1.1rem; margin-top: .7rem; color: var(--muted); font-size: .8125rem; }
.legend span { display: inline-flex; align-items: center; gap: .4rem; }
.legend b { color: var(--text); font-weight: 600; }
.legend-note { flex-basis: 100%; font-size: .75rem; }
.table-view { margin-top: .9rem; font-size: .8125rem; }
.table-view summary { width: fit-content; color: var(--muted); cursor: pointer; }
.table-view table { width: 100%; border-collapse: collapse; margin-top: .6rem; font-variant-numeric: tabular-nums; }
.table-view th, .table-view td { padding: .3rem .5rem; border-bottom: 1px solid color-mix(in srgb, var(--border) 60%, transparent); text-align: right; }
.table-view th:first-child, .table-view thead th { text-align: right; } .table-view tbody th { text-align: left; color: var(--muted); font-weight: 500; }
.table-view-wrap, #d-table { overflow-x: auto; }
.flips { margin-top: 1.6rem; padding-top: 1.1rem; border-top: 1px solid color-mix(in srgb, var(--border) 70%, transparent); }
.flips > div > p { margin: .45rem 0; }
.dir-bars { display: grid; gap: .35rem; margin: .6rem 0 1rem; max-width: 34rem; }
.dir-bars li { display: grid; grid-template-columns: minmax(10rem, auto) 1fr 3rem; align-items: center; gap: .6rem; font-size: .875rem; }
.dir-bars .bar { height: 8px; border-radius: 0 4px 4px 0; background: var(--s1); transform-origin: left; transform: scaleX(var(--w)); }
.dir-bars b { text-align: right; }
.flip-list { display: grid; gap: .6rem; }
.flip { padding: .75rem .9rem; border: 1px solid var(--border); border-radius: 10px; background: var(--bg); }
.flip-meta { display: flex; flex-wrap: wrap; align-items: baseline; gap: .2rem .8rem; font-size: .875rem; }
.flip-meta > span { color: var(--muted); }
.flip-meta a:not(.flip-diff) { color: var(--text); font-family: var(--font-serif); font-weight: 600; text-decoration: none; }
.flip-diff { margin-left: auto; font-size: .8125rem; }
.flip-text { display: grid; gap: .3rem; margin-top: .4rem; font: .9375rem/1.55 var(--font-serif); overflow-wrap: anywhere; }
.flip-text .was { color: var(--muted); }
.flip-more { color: var(--muted); font-size: .8125rem; }
.method { margin-top: 1.2rem; color: var(--muted); font-size: .75rem; line-height: 1.5; }

/* ---- editor tools: three visual checks ------------------------------------------------------- */
.tool-panel { margin-top: 1.1rem; }
.tool-help { max-width: 42rem; color: var(--muted); font-size: .9375rem; }
.tool-form { display: grid; gap: .6rem; margin-top: .8rem; }
.tool-form textarea, .tool-form input { width: 100%; padding: .7rem .85rem; border: 1px solid var(--border); border-radius: 12px; background: var(--surface);
  color: var(--text); font: 1rem/1.5 var(--font); resize: vertical; transition: border-color var(--dur) ease; }
.tool-form textarea:focus, .tool-form input:focus { outline: 3px solid var(--accent-soft); border-color: var(--accent); }
.tool-form.picker { grid-template-columns: minmax(0, 1fr) auto; }
.tool-row { display: flex; align-items: center; gap: 1rem; }
.tool-title { margin-top: 1.2rem; font: 600 1.4rem/1.2 var(--font-serif); }
.tool-out, .tool-title { scroll-margin-top: 4.5rem; }
.viz-sum { margin: .4rem 0 .2rem; color: var(--muted); font-size: .9375rem; }
.viz-sum b { color: var(--text); }
.key { display: inline-block; width: 10px; height: 10px; margin-right: .4rem; border-radius: 50%; vertical-align: -1px; }
.key.here { background: var(--s1); } .key.there { background: var(--s2); }

/* tooltip shared by the three charts: transform and opacity only */
.viz-tip { position: fixed; z-index: 90; display: grid; gap: .15rem; max-width: 18rem; padding: .5rem .65rem; border: 1px solid var(--border); border-radius: 10px;
  background: color-mix(in srgb, var(--surface-2) 96%, transparent); box-shadow: var(--shadow); font-size: .8125rem; pointer-events: none;
  opacity: 0; transform: translateY(4px); transition: opacity 120ms ease, transform 120ms var(--ease-out); }
.viz-tip.on { opacity: 1; transform: none; }
.viz-tip .q { margin-top: .2rem; font: .875rem/1.45 var(--font-serif); display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; line-clamp: 3; overflow: hidden; }
.viz-tip mark, .cd-quote mark, .snip mark { padding: 0 .1em; border-radius: 3px; background: color-mix(in srgb, var(--accent) 28%, transparent); color: inherit; }

/* 1. citation finder: the evidence constellation */
.const { margin: 1rem 0 0; border: 1px solid var(--border); border-radius: calc(var(--radius) + 4px); overflow: hidden;
  background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--accent) 9%, var(--surface)), var(--surface) 72%); }
.const svg { display: block; width: 100%; height: auto; font: 12px var(--font); user-select: none; }
.const figcaption { padding: 0 1rem .8rem; color: var(--muted); font-size: .8125rem; text-align: center; }
.const .ring { fill: none; stroke: color-mix(in srgb, var(--border) 80%, transparent); stroke-dasharray: 2 6; }
.const .link { stroke: var(--accent); stroke-linecap: round; opacity: .3; transition: opacity var(--dur) ease; }
.const.is-in .link { stroke-dasharray: var(--len); stroke-dashoffset: var(--len); animation: draw 600ms var(--ease-out) forwards; animation-delay: calc(120ms + var(--i) * 70ms); }
@keyframes draw { to { stroke-dashoffset: 0; } }
.const .link.is-sel { opacity: .85; }
.const .center { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1.5; }
.const .pulse { fill: none; stroke: var(--accent); opacity: .25; transform-box: fill-box; transform-origin: center; animation: breathe 3.2s ease-in-out infinite; }
@keyframes breathe { 50% { transform: scale(1.18); opacity: 0; } }
.const .ctext { fill: var(--text); font: 600 12px var(--font); text-anchor: middle; }
.const .sat { cursor: pointer; outline: none; }
.const.is-in .sat .enter { animation: pop 380ms var(--ease-out) both; animation-delay: calc(220ms + var(--i) * 70ms); transform-box: fill-box; transform-origin: center; }
@keyframes pop { from { opacity: 0; transform: scale(.6); } }
.const .sat .body { transform-box: fill-box; transform-origin: center; transition: transform var(--dur-fast) var(--ease-out); }
.const .sat .halo { fill: var(--accent); opacity: 0; transition: opacity var(--dur) ease; }
.const .sat .node { fill: color-mix(in srgb, var(--accent) 24%, var(--surface-2)); stroke: var(--accent); stroke-width: 1.5; transition: fill var(--dur) ease; }
.const .sat .count { fill: var(--text); font: 700 13px var(--font); text-anchor: middle; font-variant-numeric: tabular-nums; }
.const .sat .name { fill: var(--text); font: 600 13px var(--font-serif); text-anchor: middle; paint-order: stroke; stroke: var(--surface); stroke-width: 4px; }
.const .sat .sub { fill: var(--muted); font-size: 11.5px; text-anchor: middle; paint-order: stroke; stroke: var(--surface); stroke-width: 4px; }
.const .sat.is-sel .node { fill: var(--accent); }
.const .sat.is-sel .count { fill: var(--accent-ink); }
.const .sat.is-sel .halo { opacity: .18; }
.const .sat:focus-visible .halo { opacity: .3; }
.const .sat:active .body { transform: scale(.96); }
.cite-detail { margin-top: .8rem; padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.cite-detail header { display: flex; flex-wrap: wrap; align-items: center; gap: .3rem .6rem; }
.cite-detail h3 { font: 600 1.2rem/1.25 var(--font-serif); }
.cite-detail h3 a { color: inherit; text-decoration: none; }
.card-link { margin-left: auto; font-size: .8125rem; }
.cd-quote { margin: .6rem 0; font: 1.075rem/1.6 var(--font-serif); display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; line-clamp: 3; overflow: hidden; }
.cd-refs { display: flex; flex-wrap: wrap; gap: .4rem; }
.ref-chip { display: inline-flex; align-items: center; gap: .6rem; max-width: 100%; padding: .35rem .5rem .35rem .75rem; border: 1px solid var(--border); border-radius: 99px;
  background: var(--bg); color: var(--text); font: .8125rem/1.3 var(--font); cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) ease, background-color var(--dur-fast) ease; }
.ref-chip:active { transform: scale(.97); }
.ref-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.copy-state { flex: none; padding: .1rem .5rem; border-radius: 99px; background: var(--accent-soft); color: var(--accent); font-size: .75rem; font-weight: 600; }
.ref-chip.is-copied { border-color: var(--added); }
.ref-chip.is-copied .copy-state { background: color-mix(in srgb, var(--added) 18%, transparent); color: var(--added); }

/* 2. contradictions: dumbbell rows */
.db-legend { display: flex; flex-wrap: wrap; gap: .3rem 1.2rem; margin: .3rem 0 0; font-size: .8125rem; }
.db-list { display: grid; gap: .15rem; margin-top: .6rem; }
.db-row { border-radius: 12px; animation: rise 320ms var(--ease-out) both; animation-delay: calc(min(var(--i), 7) * 45ms); }
.db-row.is-open { background: var(--surface); box-shadow: inset 0 0 0 1px var(--border); }
.db-main { display: grid; grid-template-columns: 9.5rem minmax(0, 1fr) 5.6rem; align-items: center; gap: .9rem; width: 100%; padding: .55rem .8rem; border: 0; border-radius: 12px;
  background: none; color: inherit; font: inherit; text-align: left; cursor: pointer; transition: background-color var(--dur-fast) ease; }
.db-label { display: grid; min-width: 0; }
.db-label b { font: 600 1rem var(--font-serif); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.db-label small { color: var(--muted); font-size: .75rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.db-track { position: relative; height: 3rem; margin-inline: .6rem; }
.db-track::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; height: 1px; background: color-mix(in srgb, var(--border) 80%, transparent); }
.db-line { position: absolute; top: 50%; height: 4px; margin-top: -2px; border-radius: 2px; background: color-mix(in srgb, var(--muted) 55%, transparent);
  transform-origin: left; animation: grow 520ms var(--ease-out) both; animation-delay: calc(120ms + min(var(--i, 0), 7) * 45ms); }
@keyframes grow { from { transform: scaleX(0); } }
.db-dot { position: absolute; top: 50%; width: 13px; height: 13px; margin: -6.5px 0 0 -6.5px; border-radius: 50%; border: 2px solid var(--surface); box-shadow: 0 0 0 1px color-mix(in srgb, var(--bg) 60%, transparent);
  animation: pop 360ms var(--ease-out) both; animation-delay: calc(300ms + min(var(--i, 0), 7) * 45ms); }
.db-dot.here { background: var(--s1); } .db-dot.there { background: var(--s2); }
.db-val { position: absolute; font-size: .75rem; color: var(--text); transform: translateX(-50%); white-space: nowrap; }
.db-val.up { top: 0; } .db-val.down { bottom: 0; }
.db-gap { justify-self: end; padding: .15rem .55rem; border: 1px solid color-mix(in srgb, var(--warn) 45%, transparent); border-radius: 99px; color: var(--warn); font-size: .75rem; font-weight: 600; white-space: nowrap; }
.db-more { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 260ms var(--ease-out); }
.db-row.is-open .db-more { grid-template-rows: 1fr; }
.db-more > div { min-height: 0; overflow: hidden; }
.db-snips { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; padding: .2rem 1rem 1rem; }
.db-snips .kicker { display: flex; align-items: center; }
.db-snips .kicker a { color: inherit; }
.snip { margin: .35rem 0; font: .9375rem/1.55 var(--font-serif); overflow-wrap: anywhere; }
.db-all { margin-top: .5rem; }

/* 3. edit-war radar: heat map and swim-lanes */
.heat-legend { display: flex; align-items: center; gap: .6rem; margin-top: .8rem; color: var(--muted); font-size: .8125rem; }
.ramp { width: 7rem; height: .6rem; border-radius: 3px; background: linear-gradient(90deg, var(--surface-2), var(--warn)); }
.heat { margin-top: .6rem; overflow-x: auto; padding-bottom: .3rem; }
.heat-grid { display: grid; grid-template-columns: minmax(7rem, 13rem) repeat(var(--n), minmax(9px, 1fr)) 3.2rem; gap: 2px 2px; min-width: 24rem; }
.heat-axis { display: grid; grid-template-columns: subgrid; grid-column: 1 / -1; color: var(--muted); font-size: .6875rem; font-variant-numeric: tabular-nums; }
.heat-axis span { white-space: nowrap; }
.heat-row { display: grid; grid-template-columns: subgrid; grid-column: 1 / -1; align-items: center; gap: 2px; padding: 0; border: 0; border-radius: 8px; background: none; color: inherit; font: inherit; text-align: left; cursor: pointer;
  transition: background-color var(--dur-fast) ease; }
.heat-row[aria-selected] { background: var(--accent-soft); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 55%, transparent); }
.heat-name { padding: .2rem .5rem .2rem .3rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font: 600 .875rem var(--font-serif); }
.heat-cell { display: block; height: 1.4rem; border-radius: 3px; background: color-mix(in srgb, var(--warn) calc(var(--v) * 100%), var(--surface-2));
  animation: fade 340ms ease both; animation-delay: calc(var(--r, 0) * 28ms + var(--c) * 9ms); }
.heat-total { padding-right: .4rem; text-align: right; color: var(--muted); font-size: .8125rem; }
.heat-all { margin-top: .4rem; }
.heat-row:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.radar-detail { margin-top: 1rem; padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); animation: rise 320ms var(--ease-out) both; }
.radar-detail header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.radar-detail h2 { font: 600 1.35rem var(--font-serif); }
.lanes { display: grid; gap: .55rem; margin-top: .6rem; }
.lane-axis { position: relative; height: 1rem; color: var(--muted); font-size: .6875rem; font-variant-numeric: tabular-nums; }
.lane-axis span { position: absolute; transform: translateX(-50%); }
.lane { animation: rise 300ms var(--ease-out) both; animation-delay: calc(min(var(--i), 8) * 45ms); }
.lane-head { display: flex; flex-wrap: wrap; align-items: center; gap: .2rem .6rem; font-size: .875rem; }
.lane-track { position: relative; height: 1.7rem; }
.lane-track::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; height: 1px; background: color-mix(in srgb, var(--border) 85%, transparent); }
.lane-track .span { position: absolute; top: 50%; height: 4px; margin-top: -2px; border-radius: 2px; background: color-mix(in srgb, var(--muted) 45%, transparent);
  transform-origin: left; animation: grow 520ms var(--ease-out) both; }
.tick { position: absolute; top: 50%; width: 11px; height: 11px; margin: -5.5px 0 0 -5.5px; border-radius: 50%; background: var(--warn); border: 2px solid var(--surface);
  transition: transform var(--dur-fast) var(--ease-out); }
.tick::before { content: ""; position: absolute; inset: -9px; }
.tick:active { transform: scale(.9); }
.lane-text { color: var(--muted); font: .8125rem/1.45 var(--font-serif); -webkit-line-clamp: 1; line-clamp: 1; }
.tv-scroll { overflow-x: auto; }
.tv-scroll th, .tv-scroll td { white-space: nowrap; }

@media (hover: hover) and (pointer: fine) {
  .db-main:hover { background: var(--surface-2); }
  .ref-chip:hover { border-color: color-mix(in srgb, var(--accent) 60%, var(--border)); }
  .const .sat:hover .body { transform: scale(1.07); }
  .const .sat:hover .halo { opacity: .14; }
  .heat-row:hover:not([aria-selected]) { background: var(--surface-2); }
  .tick:hover { transform: scale(1.35); }
}
@media (max-width: 52rem) {
  .tool-form.picker { grid-template-columns: minmax(0, 1fr); }
  .db-main { grid-template-columns: minmax(0, 1fr) auto; row-gap: .1rem; }
  .db-track { grid-column: 1 / -1; grid-row: 2; }
  .db-snips { grid-template-columns: minmax(0, 1fr); }
  .heat-grid { grid-template-columns: minmax(5.5rem, 7rem) repeat(var(--n), minmax(7px, 1fr)); min-width: 0; }
  .heat-total { display: none; }
}

/* ---- explain one edit (history page) --------------------------------------------------------- */
.explain { margin: 0 0 1.25rem; padding: .9rem 1rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); animation: rise 280ms var(--ease-out) both; }
.explain-summary { margin: .4rem 0; font: 1.0625rem/1.55 var(--font-serif); }
.explain-facts { display: flex; flex-wrap: wrap; gap: .35rem; margin: .5rem 0; }
.explain-changes { display: grid; gap: .6rem; margin-top: .6rem; }
.explain-changes .diff-body { font-size: .9375rem; }

/* ---- error page ------------------------------------------------------------------------------- */
.page-error { max-width: 36rem; margin: 12vh auto 0; text-align: center; animation: rise var(--dur-slow) var(--ease-out) both; }
.page-error h1 { margin: .6rem 0; font: 500 2.2rem/1.1 var(--font-serif); }
.page-error p { color: var(--muted); }
.page-error-actions { display: flex; justify-content: center; gap: .6rem; margin-top: 1.4rem; }

@media (hover: hover) and (pointer: fine) {
  .seg button:hover { color: var(--text); }
  .option:not(:disabled):hover { border-color: color-mix(in srgb, var(--accent) 60%, var(--border)); }
  .card h3 a:hover { text-decoration: underline; text-underline-offset: .18em; text-decoration-thickness: 1px; }
}
@media (max-width: 52rem) {
  .dir-bars li { grid-template-columns: minmax(0, 1fr) 4rem 2.5rem; }
  .l-next { margin-left: 0; }
  .drift-main { padding: 1rem .8rem; }
}

/* ---- graph page shell: the canvas fills the screen, the chrome floats over it ----------------- */
body.page-graph {   /* Linear's near-black canvas, surface ladder and lavender (docs/design-md/linear.app.md) */
  --bg: #010102; --surface: #0f1011; --surface-2: #141516; --border: #23252a; --text: #f7f8f8; --muted: #8a8f98;
  --accent: #5e6ad2; --accent-ink: #ffffff; --accent-soft: color-mix(in srgb, var(--accent) 16%, transparent);
  --glass: color-mix(in srgb, var(--surface) 80%, transparent);
  height: 100dvh; overflow: hidden; }
body.page-graph .g-float { box-shadow: none; }              /* depth from the surfaces and hairlines, not shadows */
body.page-graph::before { background: none; }
body.page-graph main { position: relative; max-width: none; min-height: 0; padding: 0; }
body.page-graph footer { max-width: none; padding: .3rem 1rem; border: 0; font-size: .6875rem; text-align: center; opacity: .8; }
#graph-canvas { position: absolute; inset: 0; overflow: hidden; touch-action: none; animation: fade var(--dur-slow) ease both;
  background:                                               /* a faint starfield: three tiles of odd sizes so it never lines up */
    radial-gradient(circle at 17% 23%, #ffffff70 0 1px, transparent 1.6px) 0 0 / 233px 233px,
    radial-gradient(circle at 71% 64%, #c9cfff55 0 1px, transparent 1.6px) 0 0 / 311px 311px,
    radial-gradient(circle at 42% 88%, #ffffff40 0 .7px, transparent 1.3px) 0 0 / 173px 173px; }
.g-ui > :not(#graph-canvas) { position: relative; z-index: 1; }
.g-ui { position: absolute; inset: 0; display: grid; gap: .75rem; padding: 1rem; pointer-events: none;
  grid-template-columns: minmax(0, 17rem) minmax(0, 1fr) minmax(0, 22rem);
  grid-template-rows: auto minmax(0, 1fr) auto;
  grid-template-areas: "head status panel" "list . panel" "legend timeline panel"; }
.g-ui > * { min-width: 0; min-height: 0; pointer-events: auto; }
.g-float { border: 1px solid color-mix(in srgb, var(--border) 85%, transparent); border-radius: calc(var(--radius) + 2px);
  background: var(--glass); -webkit-backdrop-filter: blur(18px) saturate(1.5); backdrop-filter: blur(18px) saturate(1.5);
  box-shadow: var(--shadow); }
.g-head { grid-area: head; margin: -1rem 0 0 -1rem; padding: 1rem 1rem 1.25rem; pointer-events: none;      /* a soft scrim keeps the title readable over nodes */
  background: radial-gradient(130% 110% at 0 0, color-mix(in srgb, var(--bg) 94%, transparent) 50%, transparent 100%); }
.g-head h1 { margin-top: .15rem; font: 600 clamp(1.6rem, 1.2rem + 1.4vw, 2.3rem)/1.1 var(--font-serif); letter-spacing: -.018em;
  overflow-wrap: anywhere; width: fit-content; view-transition-name: article-title; }
#graph-status { grid-area: status; justify-self: center; align-self: start; padding: .4rem .9rem; border-radius: 99px; font-size: .875rem;
  text-align: center; }
#graph-panel { grid-area: panel; align-self: start; max-height: 100%; padding: 1.1rem 1.15rem; overflow: auto; overscroll-behavior: contain; }
#graph-timeline { grid-area: timeline; align-self: end; justify-self: center; width: min(100%, 46rem); padding: .8rem 1.1rem; }
#graph-legend { grid-area: legend; align-self: end; padding: .75rem .9rem; font-size: .8125rem; }
.g-list { grid-area: list; align-self: start; max-height: 100%; overflow: auto; overscroll-behavior: contain; }
.g-list summary { position: sticky; top: 0; z-index: 1; border-radius: inherit; background: var(--surface); padding: .55rem .9rem; color: var(--muted); font-size: .8125rem; font-weight: 600; cursor: pointer; user-select: none; }
.g-list[open] summary { border-bottom: 1px solid var(--border); }
#graph-nodelist { padding: .6rem .7rem; }
.g-list:has(#graph-nodelist:empty), #graph-status:empty, #graph-panel:empty, #graph-timeline:empty, #graph-legend:empty { display: none; }
/* each floating piece arrives once, when it gets its content */
#graph-panel, #graph-timeline, #graph-legend, .g-list { transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); }
@starting-style {
  #graph-panel:not(:empty) { opacity: 0; transform: translateX(14px); }
  #graph-timeline:not(:empty) { opacity: 0; transform: translateY(14px); }
  #graph-legend:not(:empty), .g-list { opacity: 0; transform: translateX(-10px); }
}

/* ---- page-to-page transitions --------------------------------------------------------------- */
::view-transition-group(*) { animation-duration: 340ms; animation-timing-function: var(--ease-in-out); }
::view-transition-old(root) { animation: 160ms ease both vt-out; }
::view-transition-new(root) { animation: 280ms ease 60ms both fade; }
@keyframes vt-out { to { opacity: 0; } }

/* ---- phone ---------------------------------------------------------------------------------- */
@media (max-width: 52rem) {
  .nav a { padding: .3rem .5rem; font-size: .8125rem; }
  .topbar .back span { display: none; }
  .scope { margin-left: 0; }
  .src-chip .h { display: none; }
  main { padding-inline: 1rem; }
  .topbar { padding-inline: 1rem; }
  .answer-text { font-size: 1.1875rem; }
  .rel-list, .diff-cols { grid-template-columns: minmax(0, 1fr); }
  .ask-box kbd { display: none; }
  .ask-box .btn { padding-inline: .9rem; }
  .chip { border-radius: 14px; }
  .g-ui { padding: .6rem; gap: .5rem; grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: auto auto minmax(0, 1fr) auto auto;
    grid-template-areas: "head head" "list status" ". ." "panel panel" "timeline timeline"; }
  #graph-canvas { grid-area: 1 / 1 / 4 / -1; inset: -.6rem -.6rem 0; }   /* absolute inside the rows above the bottom sheet, not under it */
  .g-head { margin: -.6rem 0 0 -.6rem; padding: .6rem .6rem .8rem; }
  #graph-legend { display: none; }      /* phone: the legend's labels are in the article list */
  #graph-status { justify-self: end; }
  #graph-panel { align-self: end; max-height: 30dvh; padding: .9rem 1rem; }
  #graph-timeline { padding: .6rem .8rem; }
  .g-list { max-height: 45dvh; }
  @starting-style { #graph-panel:not(:empty) { transform: translateY(14px); } }
}

/* ---- preferences ---------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-delay: 0s !important; animation-iteration-count: 1 !important;
    scroll-behavior: auto !important; }
  .step.is-active i, .sk::after { animation: none !important; }
  .btn:active, .chip:active, .cite:active, .back:active { transform: none; }
  .marquee { mask-image: none; }
  .examples ul { width: auto; flex-wrap: wrap; justify-content: center; gap: .6rem; animation: none !important; }
  .examples li { margin: 0; }
  .examples li[aria-hidden] { display: none; }
  #graph-panel, #graph-timeline, #graph-legend, .g-list { transition-property: opacity; transform: none !important; }
  ::view-transition-group(*), ::view-transition-old(*), ::view-transition-new(*) { animation-duration: .01ms !important; animation-delay: 0s !important; }
  ::view-transition-old(root), ::view-transition-new(root) { animation-duration: 150ms !important; }     /* a plain cross-fade stays */
}
@media (prefers-reduced-transparency: reduce) {
  .topbar, .g-float { -webkit-backdrop-filter: none; backdrop-filter: none; background: var(--surface); }
}
@media (prefers-contrast: more) {
  :root { --border: #6a6a7c; --muted: #c9c9d6; }
  .g-float, .topbar { -webkit-backdrop-filter: none; backdrop-filter: none; background: var(--surface); }
}

/* Ask page: what English / Swedish Wikipedia add (app/xlang.py) */
.pill-xl { border-color: color-mix(in srgb, var(--rel-out) 45%, transparent); color: var(--rel-out); }
.xl-adds { margin-top: 1.6rem; padding: 1rem 1.1rem; border: 1px solid color-mix(in srgb, var(--rel-out) 35%, var(--border));
  border-radius: var(--radius); background: color-mix(in srgb, var(--rel-out) 5%, var(--surface)); }
.xl-note { margin: .2rem 0 .4rem; color: var(--muted); font-size: .875rem; }
.xl-add { display: flex; gap: .75rem; padding: .75rem 0 .2rem; border-top: 1px solid var(--border); }
.xl-add > div { min-width: 0; }
.xl-lang { flex: none; align-self: flex-start; margin-top: .1rem; padding: .05rem .4rem; border: 1px solid var(--border); border-radius: 5px;
  font: 600 .6875rem var(--font-mono); color: var(--muted); }
.xl-where { margin: 0; font-weight: 600; font-size: .9375rem; }
.xl-text { margin: .2rem 0 .3rem; font-size: .9rem; color: color-mix(in srgb, var(--text) 85%, var(--muted));
  display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.xl-add a { font-size: .8125rem; }

/* Machine translation of a Finnish block (static/translate.js): always labelled as such */
[data-fi]::after { content: " · machine translation (Opus-MT)"; color: var(--muted); font-size: .8em; font-style: italic; }
.ans-tools { margin: 0 0 .5rem; }
.ans-mt { color: var(--muted); font-size: .8em; font-style: italic; }