/* Draft project page. One stylesheet, no framework. */

:root {
  /* seaborn "deep" */
  --deep-blue: #4c72b0;
  --deep-orange: #dd8452;
  --deep-green: #55a868;
  --deep-red: #c44e52;
  --deep-purple: #8172b3;
  --deep-grey: #8c8c8c;
  --deep-olive: #ccb974;
  --j-roll: var(--deep-grey);
  --j-pitch: var(--deep-purple);
  --j-knee: var(--deep-red);
  --good: var(--deep-green);
  --warn: #b89a3e;
  --bad: var(--deep-red);
  --ink: #1f2328;
  --ink-2: #4b5260;
  --ink-3: #7a8190;
  --line: #e4e6eb;
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --pill: #2b2f36;
  --pill-hover: #000000;
  --accent: var(--deep-orange);

  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 6px 24px rgba(16, 24, 40, .08);
  --sans: "Google Sans", "Noto Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --body: "Noto Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img, video { display: block; max-width: 100%; }
[hidden] { display: none !important; }
a { color: #2463c7; text-decoration: none; }
a:hover { text-decoration: underline; }
sub, sup { line-height: 0; }

.container { width: 100%; max-width: 1100px; margin: 0 auto; padding-inline: 24px; }
.container.narrow { max-width: 860px; }
.container.wide { max-width: 1320px; }
.center { text-align: center; }
.muted { color: var(--ink-3); }
.small { font-size: .88rem; }

/* ---------------------------------------------------------------- hero */
.hero { padding-block: 72px 28px; }
.title {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(3.4rem, 9vw, 5.6rem);
  letter-spacing: -.02em;
  line-height: 1;
  margin: 0;
}
.title::after {
  content: "";
  display: block;
  width: 64px;
  height: 5px;
  margin: 18px auto 0;
  background: var(--accent);
  border-radius: 3px;
}
.subtitle {
  font-family: var(--sans);
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  font-weight: 400;
  line-height: 1.25;
  margin: 18px 0 26px;
}
.authors {
  font-family: var(--sans);
  font-size: 1.2rem;
  margin: 0 0 4px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 28px;
}
.authors sup { font-size: .7em; margin-left: 1px; color: var(--ink-3); }
.affiliations {
  color: var(--ink-2);
  font-size: .98rem;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2px 24px;
}
.logos { display: flex; justify-content: center; align-items: center; gap: 34px; margin: 22px 0 6px; }
.logos img { height: 34px; width: auto; }
.logos .logo-brl { height: 46px; }

.links { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 24px; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  border-radius: 999px;
  background: var(--pill);
  color: #fff;
  font-family: var(--sans);
  font-size: 1rem;
  transition: background .15s, transform .15s;
}
.pill:hover { background: var(--pill-hover); text-decoration: none; transform: translateY(-1px); }
.pill i { font-size: 1.05em; }
.pill.is-disabled { background: #b8bcc4; cursor: default; pointer-events: none; }

/* ---------------------------------------------------------------- teaser */
.teaser { padding-block: 12px 8px; }
.teaser-caption {
  max-width: 860px;
  margin: 20px auto 0;
  text-align: center;
  color: var(--ink-2);
  font-size: 1.08rem;
}

.media-frame {
  border-radius: var(--radius);
  overflow: hidden;
  background: #eceef1;
  box-shadow: var(--shadow);
}
.media-frame video { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
/* Fullscreen fills a screen of any shape: letterbox rather than crop the sides. */
.media-frame video:fullscreen { object-fit: contain; aspect-ratio: auto; }
.media-frame video:-webkit-full-screen { object-fit: contain; aspect-ratio: auto; }
.video-main { max-width: 960px; margin: 0 auto; }

/* ---------------------------------------------------------------- stats */
.stats { padding-block: 36px 8px; }
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 18px 10px;
  border-top: 3px solid var(--ink);
}
.stat-num { font-family: var(--sans); font-weight: 700; font-size: 2.4rem; line-height: 1.1; }
.stat-num small { font-size: .6em; font-weight: 500; }
.stat-label { color: var(--ink-2); font-size: .92rem; line-height: 1.4; margin-top: 6px; }

/* ---------------------------------------------------------------- sections */
.section { padding-block: 64px; }
.section.alt { background: var(--bg-alt); }
.section.builder-first { padding-top: 8px; }
/* The hero: the generator video's link primitives assembling a
   humanoid, faded behind the hero and blended into the page at the bottom. */
.hero-video { position: relative; overflow: hidden; isolation: isolate; }
.hero-video .hero-bg {
  position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%;
  object-fit: cover; object-position: center 45%; opacity: .3; pointer-events: none;
}
.hero-video::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 30%; z-index: -1;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0), var(--bg));
}
.summary { padding-block: 8px 24px; }
.summary p { margin: 0 0 12px; color: var(--ink-2); font-size: 1.05rem; line-height: 1.7; }
.summary p:last-child { margin-bottom: 0; }
.b-disclaimer {
  max-width: 820px; margin: -20px auto 28px; text-align: center;
  font-size: .9rem; color: var(--ink-3);
}
.section-title {
  font-family: var(--sans);
  font-weight: 500;
  font-size: clamp(1.7rem, 3.6vw, 2.25rem);
  line-height: 1.2;
  text-align: center;
  margin: 0 0 28px;
}
.eyebrow {
  text-align: center;
  font-family: var(--sans);
  font-size: .85rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 8px;
}
.eyebrow + .section-title { margin-bottom: 16px; }
.lede { max-width: 820px; margin: 0 auto 36px; color: var(--ink-2); font-size: 1.08rem; text-align: center; }
.lede.below { margin: 24px auto 0; }
.lede.spaced { margin-top: 56px; }
.abstract { text-align: justify; hyphens: auto; margin: 0; }

.figure { margin: 0; }
figcaption { color: var(--ink-2); font-size: .94rem; line-height: 1.55; margin-top: 12px; text-align: center; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.how { display: flex; flex-direction: column; gap: 48px; max-width: 1000px; margin: 0 auto; }
.how-step header { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 14px; }
.how-step h3 { font-family: var(--sans); font-weight: 500; font-size: 1.35rem; margin: 0; }
.how-step p { margin: 2px 0 0; color: var(--ink-2); }
.step-n {
  flex: none; display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
  background: var(--ink); color: #fff; font-family: var(--sans); font-size: .95rem; margin-top: 2px;
}

/* ---------------------------------------------------------------- placeholders */
/* A block where a video will go: same 16:9 footprint, says what belongs there. */
.ph {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  border: 2px dashed #c9cdd4;
  background:
    repeating-linear-gradient(135deg, transparent 0 14px, rgba(31, 35, 40, .025) 14px 28px),
    #eef0f3;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.ph-body { max-width: 34em; padding: 18px 24px; text-align: center; display: flex; flex-direction: column; gap: 6px; }
.ph-tag {
  align-self: center;
  font-family: var(--sans);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
  border: 1px solid #c9cdd4;
  border-radius: 999px;
  padding: 2px 10px;
}
.ph-body b { font-family: var(--sans); font-size: 1.15rem; font-weight: 500; color: var(--ink); }
.ph-body p { margin: 0; color: var(--ink-2); font-size: .92rem; line-height: 1.5; }
.ph-body code { font-family: var(--mono, monospace); font-size: .78rem; color: var(--ink-3); }
.ph-clock { position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: rgba(31, 35, 40, .06); }
.ph-clock span { display: block; height: 100%; width: 0; background: var(--robot, var(--ink-3)); }

/* ---------------------------------------------------------------- explorer */
.explorer-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 18px; }
.switch { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; font-size: .95rem; }
.switch input { position: absolute; opacity: 0; }
.switch-track { width: 38px; height: 22px; border-radius: 999px; background: #c9cdd4; position: relative; transition: background .15s; }
.switch-thumb { position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; border-radius: 50%; background: #fff; transition: transform .15s; }
.switch input:checked + .switch-track { background: var(--pill); }
.switch input:checked + .switch-track .switch-thumb { transform: translateX(16px); }
.switch input:focus-visible + .switch-track { outline: 2px solid var(--accent); outline-offset: 2px; }

.explorer-rows { display: flex; flex-direction: column; gap: 22px; }
.xrow {
  background: #fff;
  border: 1px solid var(--line);
  border-left: 5px solid var(--robot);
  border-radius: var(--radius);
  padding: 16px 18px 14px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .04);
}
.xrow:focus { outline: none; }
.xrow-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 20px; margin-bottom: 12px; }
.xrow-id { display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 12px; }
.xrow-swatch { width: 12px; height: 12px; border-radius: 3px; background: var(--robot); align-self: center; }
.xrow-name { font-family: var(--sans); font-size: 1.35rem; font-weight: 700; margin: 0; color: var(--robot); }
.xrow-facts { color: var(--ink-2); font-size: .9rem; }

.task-nav { display: flex; align-items: center; gap: 6px; }
.arrow {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  cursor: pointer; display: grid; place-items: center;
  transition: background .15s, border-color .15s;
}
.arrow:hover { background: var(--pill); color: #fff; border-color: var(--pill); }
.task-name { min-width: 150px; text-align: center; display: flex; flex-direction: column; line-height: 1.2; }
.task-name b { font-family: var(--sans); font-weight: 500; font-size: 1.05rem; }
.task-count { font-size: .75rem; color: var(--ink-3); }

.xrow-body { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 18px; align-items: start; }
.xrow-video video { width: 100%; aspect-ratio: 16 / 9; border-radius: var(--radius); background: #eceef1; }
.xrow-plot { display: flex; flex-direction: column; position: relative; }
.plot-head { display: flex; justify-content: space-between; align-items: center; font-family: var(--sans); font-size: .9rem; color: var(--ink-2); margin-bottom: 4px; }
.plot-flag { font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: var(--warn); border: 1px solid currentColor; border-radius: 999px; padding: 1px 8px; }
.ts-plot { width: 100%; aspect-ratio: 1 / .82; display: block; }
.plot-legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: .8rem; color: var(--ink-2); }
.plot-legend i { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: var(--c); margin-right: 5px; vertical-align: 0; }
.plot-legend i.sq { border-radius: 2px; }
.plot-legend i.dash { width: 16px; height: 0; border-radius: 0; background: none; border-top: 1.5px dashed var(--ink); vertical-align: 3px; }
.plot-tip {
  position: absolute; z-index: 2; pointer-events: none; min-width: 150px;
  display: flex; flex-direction: column; gap: 1px; padding: 7px 10px;
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  box-shadow: 0 4px 14px rgba(16, 24, 40, .12); font-size: .78rem; color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}
.plot-tip b { color: var(--ink); font-weight: 600; }
.plot-tip .tip-main { color: var(--ink); margin-bottom: 3px; }
.plot-tip span:not(.tip-main) { display: flex; justify-content: space-between; gap: 12px; }
.plot-tip em { font-style: normal; color: var(--ink); }
.plot-legend i.ring { background: var(--ink-3); box-shadow: 0 0 0 1.5px #fff, 0 0 0 2.5px var(--ink-3); }
.plot-readout { margin: 6px 0 0; font-size: .82rem; color: var(--ink-2); font-variant-numeric: tabular-nums; min-height: 1.3em; }

.xrow-ladder { margin-top: 12px; }
/* The slider's stops sit over the rung buttons' centres. The rungs are --n equal
   columns with a --gap between them, so centres are (100% + gap) / n apart and
   the first is half a column in; the slider is sized and shifted so its thumb's
   centre lands on each of those. */
.xrow-ladder { --gap: 3px; }
.level {
  --fill: var(--robot);
  --pitch: calc((100% + var(--gap)) / var(--n, 1));
  display: block;
  width: calc(var(--pitch) * (var(--n, 1) - 1) + var(--thumb));
  margin: 10px 0 16px calc(var(--pitch) / 2 - var(--gap) / 2 - var(--thumb) / 2);
}
.rungs { display: grid; grid-template-columns: repeat(var(--n), 1fr); gap: var(--gap); margin-top: 4px; }
.rung {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  border: 0; background: none; padding: 3px 0; cursor: pointer;
  font: .72rem var(--body); color: var(--ink-3); border-radius: 6px;
}
.rung i { display: block; width: 80%; height: 5px; border-radius: 3px; background: #e4e6eb; position: relative; overflow: hidden; }
.rung i::after { content: ""; position: absolute; inset: 0; width: calc(var(--p) * 100%); background: var(--good); }
.rung[data-state="partial"] i::after { background: var(--warn); }
.rung[data-state="fail"] i::after { background: var(--bad); }
.rung[data-state="fail"] i { background: rgba(196, 78, 82, .25); }
.rung[data-state="none"] { opacity: .45; }
.rung.is-on { color: var(--ink); font-weight: 700; background: var(--bg-alt); }
.rung-axis { display: block; text-align: right; font-size: .75rem; color: var(--ink-3); margin-top: 2px; }
.rung-caption { margin: 6px 0 0; font-size: .92rem; color: var(--ink-2); }

/* ---------------------------------------------------------------- builder */
.builder {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) 320px;
  gap: 18px;
  align-items: start;
}
.b-controls, .b-report {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
.b-slider { display: block; margin-bottom: 13px; }
.b-slider-head { display: flex; justify-content: space-between; font-size: .9rem; color: var(--ink-2); }
.b-slider-head b { color: var(--ink); font-variant-numeric: tabular-nums; }
.b-slider input[type=range] { width: 100%; margin: 8px 0 4px; --fill: var(--robot-accent, var(--accent)); }
.b-slider-ends { display: flex; justify-content: space-between; align-items: center; gap: 6px; font-size: .72rem; color: var(--ink-3); }
.b-auto { display: inline-flex; align-items: center; gap: 4px; color: var(--ink-2); cursor: pointer; }
.b-auto input { margin: 0; accent-color: var(--robot-accent, var(--accent)); }
.b-slider input[type=range]:disabled { opacity: .4; }
.b-time { font-size: .74rem; color: var(--ink-3); }
/* The actuator fits under the render. */
.b-mid { display: flex; flex-direction: column; gap: 18px; min-width: 0; }
.b-fits { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px 10px; transition: opacity .2s; }
.b-fits.is-stale { opacity: .45; }
.fits-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 16px; margin-bottom: 6px; }
.fits-head h4 { font-family: var(--sans); font-weight: 500; font-size: .95rem; margin: 0; }
.fits-legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: .8rem; color: var(--ink-2); }
.fits-legend i { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: var(--c); margin-right: 5px; }
.fits-legend i.this { background: var(--ink); box-shadow: 0 0 0 2px #fff, 0 0 0 3px var(--ink); width: 8px; height: 8px; }
.fits-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 14px; }
.fits-grid canvas { width: 100%; aspect-ratio: 1.25 / 1; display: block; }
.fits-note { margin: 6px 0 0; }

/* The robot switch: a segmented control, like the site's pills but joined. */
.b-top { display: flex; flex-direction: column; align-items: center; gap: 8px; margin: -8px 0 22px; }
.seg {
  display: inline-flex; padding: 4px; gap: 4px;
  background: #eceef1; border-radius: 999px;
  box-shadow: inset 0 1px 2px rgba(16, 24, 40, .06);
}
.seg-btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 9px 22px; border: 0; border-radius: 999px;
  background: transparent; color: var(--ink-2);
  font-family: var(--sans); font-size: 1rem; font-weight: 500; cursor: pointer;
  transition: background .18s, color .18s, box-shadow .18s;
}
.seg-btn i { font-size: 1.05em; opacity: .75; }
.seg-btn:hover { color: var(--ink); }
.seg-btn.is-active { background: #fff; color: var(--ink); box-shadow: 0 1px 3px rgba(16, 24, 40, .12), 0 1px 1px rgba(16, 24, 40, .06); }
.seg-btn.is-active i { opacity: 1; color: var(--robot-accent, var(--accent)); }
.seg-btn.is-active { color: var(--robot-accent, var(--ink)); }
.seg-btn:focus-visible { outline: 2px solid var(--robot-accent, var(--accent)); outline-offset: 2px; }
.b-preset { margin: 0; }
.b-reset { font-family: var(--sans); font-size: .88rem; border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 5px 14px; cursor: pointer; color: var(--ink-2); }
.b-reset:hover { border-color: #b8bcc4; color: var(--ink); }
.b-note { margin: 14px 0 0; line-height: 1.45; }

.b-view { position: relative; height: 600px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.b-canvas, .b-canvas canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.b-overlay { position: absolute; top: 12px; left: 14px; display: flex; flex-direction: column; gap: 4px; pointer-events: none; }
.b-mass { font-family: var(--sans); font-size: 1rem; color: var(--ink-2); }
.b-mass b { font-size: 2rem; color: var(--ink); }
.b-mass.is-stale { opacity: .35; }
.b-status { align-self: flex-start; font-size: .78rem; border-radius: 999px; padding: 2px 10px; color: #fff; background: var(--ink-3); }
.b-status.good { background: var(--good); }
.b-status.warn { background: var(--warn); }
.b-status.bad { background: var(--bad); }
.b-refused {
  position: absolute; left: 12px; right: 12px; bottom: 12px;
  background: rgba(255, 255, 255, .95); border: 1px solid rgba(196, 78, 82, .4);
  border-left: 4px solid var(--bad); border-radius: 10px; padding: 10px 14px;
  font-size: .88rem; color: var(--ink-2);
}
.b-refused b { color: var(--bad); font-family: var(--sans); }
.b-refused ul { margin: 6px 0; padding-left: 18px; }
.b-sim-bar { position: absolute; right: 12px; bottom: 12px; left: 12px; display: flex; justify-content: flex-end; align-items: center; gap: 10px; pointer-events: none; }
.b-sim-note { font-size: .78rem; color: var(--ink-2); background: rgba(255, 255, 255, .85); border-radius: 999px; padding: 3px 10px; font-variant-numeric: tabular-nums; }
.b-sim {
  pointer-events: auto; display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  font: 500 .88rem var(--sans); color: #fff; background: var(--robot-accent, var(--accent));
  border: 0; border-radius: 999px; padding: 8px 16px; box-shadow: 0 2px 8px rgba(16, 24, 40, .18);
}
.b-sim:disabled { opacity: .45; cursor: default; }
@media (max-width: 640px) {
  .b-sim-bar { flex-wrap: wrap; }
  .b-sim-note { flex: 1 1 100%; text-align: center; }
}
.b-loading { position: absolute; inset: 0; display: grid; place-items: center; color: var(--ink-3); background: var(--bg-alt); padding: 16px; text-align: center; }
.b-load { width: min(340px, 100%); display: flex; flex-direction: column; align-items: center; gap: 10px; }
.b-load-text { color: var(--ink-2); font-size: .92rem; }
.b-load-bar { width: 100%; height: 6px; border-radius: 3px; background: #dfe2e7; overflow: hidden; }
.b-load-bar i { display: block; height: 100%; width: 0; border-radius: 3px; background: var(--accent); transition: width .25s linear; }
.b-load-detail { font-size: .78rem; color: var(--ink-3); font-variant-numeric: tabular-nums; }

.b-report { position: sticky; top: calc(16px + env(safe-area-inset-top, 0px)); font-size: .88rem; display: flex; flex-direction: column; gap: 16px; transition: opacity .2s; max-height: 640px; overflow-y: auto; }
.b-report.is-stale { opacity: .45; }
.b-report h4 { font-family: var(--sans); font-weight: 500; font-size: .95rem; margin: 0 0 8px; }
.massbar { display: flex; height: 12px; border-radius: 6px; overflow: hidden; gap: 2px; }
.massbar-legend { display: flex; flex-direction: column; gap: 1px; margin-top: 6px; color: var(--ink-2); font-size: .82rem; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 3px 12px; margin: 0; }
.kv dt { color: var(--ink-2); }
.kv dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.kv em { display: block; font-style: normal; color: var(--ink-3); font-size: .76rem; }
.check { margin-bottom: 10px; }
.check-head { display: flex; justify-content: space-between; }
.check-head b.ok { color: var(--good); }
.check-head b.warn { color: var(--warn); }
.band { position: relative; height: 8px; background: #eef0f3; border-radius: 4px; margin: 5px 0 2px; }
.band-in { position: absolute; top: 0; bottom: 0; background: rgba(85, 168, 104, .28); border-radius: 4px; }
.band-mark { position: absolute; top: -3px; width: 3px; height: 14px; margin-left: -1.5px; background: var(--good); border-radius: 2px; }
.band-mark.warn { background: var(--warn); }
.check-foot { display: flex; justify-content: space-between; gap: 8px; font-size: .74rem; color: var(--ink-3); }
.check-foot .warn { color: var(--warn); }
.override { display: grid; grid-template-columns: 1fr auto; gap: 0 10px; margin-bottom: 8px; }
.override s { color: var(--ink-3); }
.override em { grid-column: 1 / -1; font-style: normal; font-size: .76rem; color: var(--ink-3); }
details summary { cursor: pointer; font-family: var(--sans); font-weight: 500; font-size: .95rem; }
.count { display: inline-block; min-width: 1.6em; text-align: center; font-size: .75rem; background: var(--bg-alt); border-radius: 999px; padding: 0 6px; color: var(--ink-2); }
.warnings { margin: 8px 0 0; padding-left: 18px; color: var(--ink-2); font-size: .8rem; display: flex; flex-direction: column; gap: 6px; }

/* ---------------------------------------------------------------- sliders */
/* A thin grey track filled up to the thumb's centre (--frac, 0..1, set by
   paintRange in main.js). The thumb's centre travels from thumb/2 to
   100% - thumb/2, not 0 to 100%, so the fill stops at the same place.
   (draft-site-fixes) */
input[type=range] {
  --thumb: 16px;
  --stop: calc(var(--thumb) / 2 + var(--frac, .5) * (100% - var(--thumb)));
  -webkit-appearance: none; appearance: none;
  height: 4px; border-radius: 2px; cursor: pointer;
  background: linear-gradient(to right, var(--fill, var(--accent)) var(--stop), #dfe2e7 var(--stop));
}
input[type=range]:disabled { cursor: default; filter: grayscale(1); opacity: .5; }
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; box-sizing: border-box; width: var(--thumb); height: var(--thumb); border-radius: 50%;
  background: #fff; border: 2px solid var(--fill, var(--accent));
  box-shadow: 0 1px 3px rgba(16, 24, 40, .2); transition: transform .12s;
}
input[type=range]:active::-webkit-slider-thumb { transform: scale(1.15); }
input[type=range]::-moz-range-thumb {
  box-sizing: border-box; width: var(--thumb); height: var(--thumb); border-radius: 50%; background: #fff;
  border: 2px solid var(--fill, var(--accent)); box-shadow: 0 1px 3px rgba(16, 24, 40, .2);
}
input[type=range]::-moz-range-track { height: 4px; border-radius: 2px; background: #dfe2e7; }
input[type=range]::-moz-range-progress { height: 4px; border-radius: 2px; background: var(--fill, var(--accent)); }
input[type=range]:focus-visible { outline: 2px solid var(--fill, var(--accent)); outline-offset: 4px; }

/* ---------------------------------------------------------------- bibtex */
.bibtex { position: relative; }
.bibtex pre {
  margin: 0;
  padding: 20px 22px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: .9rem;
  line-height: 1.6;
}
.copy {
  position: absolute;
  top: 10px;
  right: 10px;
  font-family: var(--sans);
  font-size: .85rem;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  cursor: pointer;
}
.copy:hover { color: var(--ink); border-color: #b8bcc4; }

/* ---------------------------------------------------------------- footer */
.footer { padding-block: 36px 48px; border-top: 1px solid var(--line); color: var(--ink-2); font-size: .92rem; }
.footer p { margin: 4px 0; }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 1100px) {
  .builder { grid-template-columns: 240px minmax(0, 1fr); }
  .b-report { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); max-height: none; }
}
@media (max-width: 860px) {
  .xrow-body { grid-template-columns: 1fr; }
  .builder { grid-template-columns: 1fr; }
  .b-view { height: 420px; }
  .fits-grid { grid-template-columns: 1fr; }
  .b-report { position: static; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .container { padding-inline: 16px; }
  .hero { padding-top: 48px; }
  .section { padding-block: 48px; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .rung span { font-size: .6rem; }
  .task-name { min-width: 110px; }
  .abstract { text-align: left; }
}