:root {
  --bg: #f7f4ef;
  --bg2: #efe8dc;
  --ink: #1c1914;
  --muted: #5c564c;
  --line: #d9d0c2;
  --card: #fffdf8;
  --accent: #0f6b5c;
  --accent2: #c45c26;
  --gold-track: #f0c94d;
  --pred-track: #2f6f66;
  --coarse-track: #9aa0a6;
  --contact-track: #2f6f66;
  --selector-track: #c45c26;
  --good: #1f7a3f;
  --bad: #a33b2b;
  --warn: #9a6b12;
  --shadow: 0 10px 30px rgba(28, 25, 20, 0.06);
  --max: 920px;
  --page-max: 1180px;
  --toc-w: 200px;
  --serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: var(--sans);
  line-height: 1.65;
  font-size: 17px;
}

a { color: var(--accent); }
img, svg, video { max-width: 100%; height: auto; display: block; }

.topnav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid #e8e8e8;
}
.topnav-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0.7rem 1.2rem;
  display: flex; gap: 0.85rem; flex-wrap: wrap; align-items: center;
}
.brand {
  font-weight: 700; letter-spacing: -0.02em; color: var(--ink); text-decoration: none;
  margin-right: auto;
}
.topnav-links {
  display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center;
}
.topnav a {
  text-decoration: none; color: var(--muted); font-size: 0.86rem;
}
.topnav a:hover { color: var(--accent); }
@media (min-width: 1100px) {
  .topnav-links { display: none; }
}
.lang-switch {
  display: inline-flex; gap: 0.15rem; margin-left: 0.35rem;
  border: 1px solid var(--line); border-radius: 6px; padding: 0.1rem;
  background: rgba(255,255,255,0.55);
}
.lang-btn {
  border: 0; background: transparent; cursor: pointer;
  font: inherit; font-size: 0.8rem; color: var(--muted);
  padding: 0.2rem 0.55rem; border-radius: 4px;
}
.lang-btn:hover { color: var(--ink); }
.lang-btn.active {
  background: var(--ink); color: #fff; font-weight: 600;
}

/* —— Splash: full-viewport 5×5 video wall —— */
.splash {
  position: relative;
  min-height: 100vh;
  height: 100vh;
  display: flex;
  flex-direction: column;
  color: #fff;
  overflow: hidden;
  background: #0a0c0f;
}
.splash-grid.hero-grid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(5, 1fr);
  gap: 2px;
  border-radius: 0;
  background: #000;
  z-index: 0;
}
.splash-grid .hero-cell {
  position: relative;
  aspect-ratio: auto;
  width: 100%;
  height: 100%;
  min-height: 0;
  overflow: hidden;
  background: #111;
}
.splash-grid .hero-cell video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  max-width: none;
}
.splash-grid .hero-cell .cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 0.2rem 0.3rem;
  font-size: 0.55rem;
  line-height: 1.2;
  color: #fff;
  background: linear-gradient(transparent, rgba(0,0,0,0.78));
  pointer-events: none;
  opacity: 0.9;
}
@media (max-width: 900px) {
  .splash-grid.hero-grid {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(9, 1fr);
  }
}
@media (max-width: 520px) {
  .splash-grid.hero-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(13, 1fr);
  }
  .splash { height: auto; min-height: 100vh; }
  .splash-grid.hero-grid { position: absolute; min-height: 100%; }
}
.splash-scrim {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 45%, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.25) 55%, rgba(0,0,0,0.55) 100%),
    linear-gradient(180deg, rgba(0,0,0,0.45) 0%, transparent 28%, transparent 65%, rgba(0,0,0,0.5) 100%);
  pointer-events: none;
  z-index: 1;
}
.splash-ui {
  position: relative; z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: var(--page-max);
  width: 100%;
  margin: 0 auto;
  padding: 1rem 1.2rem 2.5rem;
}
.splash-bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap;
}
.splash-brand { color: #fff !important; margin-right: 0; font-size: 1.05rem; }
.splash-bar-right {
  display: flex; align-items: center; gap: 0.85rem; flex-wrap: wrap;
}
.splash-link {
  color: rgba(255,255,255,0.82);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
}
.splash-link:hover { color: #fff; }
.splash .lang-switch {
  border-color: rgba(255,255,255,0.35);
  background: rgba(0,0,0,0.25);
}
.splash .lang-btn { color: rgba(255,255,255,0.75); }
.splash .lang-btn:hover { color: #fff; }
.splash .lang-btn.active { background: #fff; color: #0b1c2c; }
.splash-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 3rem 0 2rem;
}
.splash-kicker {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  color: rgba(255,255,255,0.7);
  margin: 0 0 1rem;
  font-weight: 600;
}
.splash-center h1 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 0.55rem;
  max-width: 16ch;
  text-shadow: 0 2px 24px rgba(0,0,0,0.45);
}
.splash-lede {
  max-width: 48ch;
  color: rgba(255,255,255,0.9);
  font-size: 1.05rem;
  margin: 0 0 1.1rem;
  text-shadow: 0 1px 12px rgba(0,0,0,0.5);
}
.splash .tag-pills { justify-content: center; margin-bottom: 1.4rem; }
.splash .tag-pill {
  color: #fff;
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.28);
}
.splash-cta {
  display: inline-block;
  background: #fff;
  color: #0b1c2c;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
}
.splash-cta:hover { background: #e8eef4; }

.tag-pills {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  margin: 0 0 0.85rem;
}
.tag-pill {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.22rem 0.7rem;
}

.blog-shell {
  background: #fff;
  border-top: 1px solid #eee;
}
.page-body {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 1.5rem 1.2rem 0;
  display: grid;
  grid-template-columns: var(--toc-w) minmax(0, 1fr);
  gap: 1.75rem;
  align-items: start;
}
.side-toc {
  position: sticky;
  top: 3.6rem;
  align-self: start;
  padding: 0.4rem 0 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  max-height: calc(100vh - 4.2rem);
  overflow-y: auto;
}
.side-toc-label {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 0.45rem;
}
.side-toc a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.84rem;
  padding: 0.28rem 0.55rem 0.28rem 0.7rem;
  border-left: 2px solid transparent;
  line-height: 1.35;
}
.side-toc a:hover { color: var(--ink); }
.side-toc a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
  background: rgba(15, 107, 92, 0.06);
}
.wrap {
  max-width: none;
  margin: 0;
  padding: 0 0 5rem;
  min-width: 0;
}
@media (max-width: 1099px) {
  .page-body { grid-template-columns: 1fr; }
  .side-toc { display: none; }
}

.tldr {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
  margin: 1.5rem 0 2.5rem;
}
@media (max-width: 800px) {
  .tldr { grid-template-columns: 1fr; }
}
.tldr .card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.1rem 1.15rem;
  box-shadow: var(--shadow);
}
.tldr .k { font-size: 0.78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.tldr .v {
  font-family: var(--serif);
  font-size: 2rem; margin: 0.25rem 0;
  letter-spacing: -0.03em;
}
.tldr .s { font-size: 0.88rem; color: var(--muted); }

section {
  margin: 2.8rem 0;
  padding-top: 0.5rem;
}
section > h2 {
  font-family: var(--serif);
  font-size: 1.85rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.8rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.45rem;
}
h3 {
  font-family: var(--serif);
  font-size: 1.25rem;
  margin: 1.6rem 0 0.55rem;
}
h4 { margin: 1rem 0 0.4rem; font-size: 1.02rem; }

.callout {
  background: #f3ebe0;
  border-left: 4px solid var(--accent2);
  padding: 0.9rem 1rem;
  border-radius: 0 10px 10px 0;
  margin: 1rem 0;
}
.callout.good { border-left-color: var(--good); background: #eaf5ee; }
.callout.bad { border-left-color: var(--bad); background: #f8ecea; }
.callout.warn { border-left-color: var(--warn); background: #f7f0df; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin: 1rem 0 1.4rem;
}
th, td {
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
th {
  background: var(--bg2);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
tr:last-child td { border-bottom: none; }
tr.best td { background: #eaf5ee; font-weight: 600; }
.num { font-variant-numeric: tabular-nums; font-family: var(--mono); font-size: 0.86rem; }
.delta-up { color: var(--good); }
.delta-down { color: var(--bad); }

.chart-box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  margin: 1rem 0 1.5rem;
  box-shadow: var(--shadow);
}
.chart-box h4 { margin: 0 0 0.75rem; font-size: 0.95rem; }

.bars { display: grid; gap: 0.45rem; }
.bar-row { display: grid; grid-template-columns: minmax(140px, 2.2fr) 1fr 64px; gap: 0.6rem; align-items: center; }
.bar-label { font-size: 0.82rem; color: var(--muted); }
.bar-track {
  height: 12px; background: #ebe4d8; border-radius: 999px; overflow: hidden;
}
.bar-fill {
  height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), #2a9b7f);
}
.bar-fill.alt { background: linear-gradient(90deg, var(--accent2), #e0894a); }
.bar-val { font-family: var(--mono); font-size: 0.8rem; text-align: right; }

.timeline {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  margin: 1rem 0;
}
.lane { margin: 0.7rem 0; }
.lane-title { font-size: 0.8rem; color: var(--muted); margin-bottom: 0.35rem; }
.lane-track {
  position: relative; height: 34px; background: #efe8dc; border-radius: 8px;
}
.lane-track.tall { height: 42px; }
.seg {
  position: absolute; top: 4px; bottom: 4px; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.65rem; color: white; font-family: var(--mono);
  cursor: pointer; overflow: hidden; padding: 0 4px;
  white-space: nowrap; text-overflow: ellipsis;
  transition: filter 0.12s ease, transform 0.12s ease;
}
.seg:hover, .seg.active { filter: brightness(1.08); transform: translateY(-1px); outline: 2px solid var(--ink); outline-offset: 1px; }
.seg.gold { background: var(--gold-track); color: #1a1510; }
.seg.pred { background: var(--pred-track); opacity: 0.94; }
.seg.match { box-shadow: inset 0 0 0 2px #f5d76e; }

.figure {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  margin: 1.2rem 0;
  box-shadow: var(--shadow);
}
.figure figcaption {
  font-size: 0.85rem; color: var(--muted); margin-top: 0.6rem;
}
.figure img, .figure video {
  width: 100%;
  border-radius: 8px;
  background: #1a222c;
}
.figure img[src$=".svg"] {
  background: var(--card);
}
.gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}
@media (max-width: 700px) { .gallery { grid-template-columns: 1fr; } }

.pipeline {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 1rem 0;
}
@media (max-width: 1050px) { .pipeline { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 800px) { .pipeline { grid-template-columns: 1fr 1fr; } }
.pipeline .step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem;
}
.pipeline .n {
  font-family: var(--mono); font-size: 0.75rem; color: var(--accent);
}
.pipeline .t { font-weight: 650; margin: 0.2rem 0; }
.pipeline .d { font-size: 0.84rem; color: var(--muted); }

pre, code { font-family: var(--mono); }
pre {
  background: #1d2228;
  color: #e8e2d6;
  padding: 1rem;
  border-radius: 12px;
  overflow: auto;
  font-size: 0.82rem;
  line-height: 1.5;
  white-space: pre-wrap;
}
.prompt-box { margin: 1rem 0 1.5rem; }

.toc {
  columns: 2; gap: 1.5rem;
  font-size: 0.92rem;
}
@media (max-width: 700px) { .toc { columns: 1; } }
.toc a { text-decoration: none; }

footer {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 2rem 1.2rem 3rem;
  color: var(--muted);
  font-size: 0.86rem;
  border-top: 1px solid var(--line);
}

/* glossary */
.glossary {
  display: grid;
  gap: 0.55rem;
  margin: 1rem 0 1.5rem;
}
.glossary-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
}
.glossary-item dt {
  font-family: var(--mono);
  font-size: 0.86rem;
  color: var(--accent);
  font-weight: 600;
}
.glossary-item dd {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

/* walkthrough steps */
.steps { display: grid; gap: 1.4rem; margin: 1.2rem 0; }
.step-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow);
}
.step-card .step-h {
  display: flex; gap: 0.75rem; align-items: baseline; flex-wrap: wrap;
  margin-bottom: 0.55rem;
}
.step-card .badge {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}
.step-card .step-title {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin: 0;
}
.step-card .plain { color: var(--muted); margin: 0.35rem 0 0.8rem; }

details.prompt-fold {
  margin: 0.8rem 0 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #faf7f1;
}
details.prompt-fold > summary {
  cursor: pointer;
  padding: 0.65rem 0.9rem;
  font-weight: 600;
  font-size: 0.92rem;
  list-style: none;
}
details.prompt-fold > summary::-webkit-details-marker { display: none; }
details.prompt-fold > summary::before {
  content: "▸ ";
  color: var(--accent);
  font-family: var(--mono);
}
details.prompt-fold[open] > summary::before { content: "▾ "; }
details.prompt-fold .prompt-box { margin: 0; }
details.prompt-fold pre {
  border-radius: 0 0 10px 10px;
  margin: 0;
  max-height: 420px;
}

/* appendix */
pre.formula {
  font-family: var(--mono);
  font-size: 0.86rem;
  background: #f4f1ea;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  line-height: 1.55;
  color: var(--ink);
}
.concept-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem 1rem;
  margin: 0.75rem 0;
  background: #fffdf8;
}
.concept-card h4 {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
}
.concept-card p {
  margin: 0.35rem 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}
.concept-card p strong { color: var(--ink); }

.legend-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  margin: 0.75rem 0 1rem;
  color: var(--muted);
  font-size: 0.86rem;
}
.legend-key {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.legend-swatch {
  width: 1rem;
  height: 0.68rem;
  border-radius: 3px;
  border: 1px solid rgba(0,0,0,0.12);
}
.legend-swatch.gold { background: var(--gold-track); }
.legend-swatch.pred { background: var(--pred-track); }
.legend-swatch.coarse { background: var(--coarse-track); }
.legend-swatch.selector { background: var(--selector-track); }

.ref-list {
  display: grid;
  gap: 0.7rem;
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}
.ref-list li { padding-left: 0.2rem; }
.ref-list li, .ref-list a { overflow-wrap: anywhere; }
.ref-list .ref-note {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
  margin-top: 0.1rem;
}

/* method cards */
.method-grid {
  display: grid;
  gap: 0.9rem;
  margin: 1.2rem 0;
}
.method-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}
.method-card.fail { border-left: 4px solid var(--bad); }
.method-card.win { border-left: 4px solid var(--good); }
.method-card .mc-head {
  display: flex; justify-content: space-between; gap: 0.8rem; flex-wrap: wrap;
  align-items: baseline;
}
.method-card .mc-name { font-weight: 650; }
.method-card .mc-score {
  font-family: var(--mono); font-size: 0.9rem; color: var(--accent);
}
.method-card .mc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem 1rem;
  margin-top: 0.7rem;
  font-size: 0.9rem;
}
@media (max-width: 700px) { .method-card .mc-grid { grid-template-columns: 1fr; } }
.method-card .lab {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--muted); margin-bottom: 0.15rem;
}
.method-card img {
  margin-top: 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.cand-table td:first-child { font-family: var(--mono); white-space: nowrap; }
.seg-detail {
  background: #f3ebe0;
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  margin-top: 0.75rem;
  font-size: 0.92rem;
  min-height: 3.2rem;
}
.seg-detail .muted,
.plain.muted { color: var(--muted); font-size: 0.85rem; }

.video-wrap video {
  width: 100%;
  max-height: 420px;
  background: #111;
  border-radius: 10px;
}
.video-wrap.landscape video {
  max-height: 480px;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #0b0b0b;
}
.walk-explore {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(280px, 1.2fr);
  gap: 0.85rem;
  margin-top: 0.85rem;
  align-items: stretch;
}
@media (max-width: 860px) {
  .walk-explore { grid-template-columns: 1fr; }
}
.walk-explore-anno .seg-detail {
  height: 100%;
  min-height: 8rem;
  margin-top: 0;
}
.walk-explore-video {
  position: relative;
}
.walk-clip-meta {
  margin-top: 0.4rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
}
.walk-seg-table tbody tr {
  cursor: pointer;
}
.walk-seg-table tbody tr:hover {
  background: #f6f1ea;
}
.walk-seg-table tbody tr.active {
  background: #eaf5ee;
  outline: 1px solid #b7d7c2;
}
.timeline .seg.active {
  box-shadow: 0 0 0 2px #1a7f4b;
  z-index: 2;
}

/* —— Boundary comparison (Macrodata-style) —— */
.bc-card {
  background: #f7f4ef;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem 1.1rem 1.15rem;
  margin: 1rem 0 1.5rem;
  box-shadow: var(--shadow);
}
.bc-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.35rem;
}
.bc-title {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.bc-title strong {
  color: var(--ink);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  text-transform: none;
}
.bc-now {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
}
.bc-instr {
  margin: 0 0 0.75rem;
  font-size: 0.92rem;
  color: var(--ink);
}
.bc-video-wrap {
  background: #111;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 0.9rem;
}
.bc-video-wrap video {
  display: block;
  width: 100%;
  max-height: 420px;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #0b0b0b;
}
.bc-board {
  position: relative;
  background: #fff;
  border: 1px solid #e5ddd0;
  border-radius: 12px;
  padding: 0.75rem 0.75rem 0.55rem;
  overflow: hidden;
}
.bc-lane {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 0.55rem;
  align-items: center;
  margin: 0.45rem 0;
}
.bc-lane-label {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.2;
}
.bc-lane-track {
  position: relative;
  height: 36px;
  background: #f0ebe3;
  border-radius: 8px;
}
.bc-seg {
  position: absolute;
  top: 4px;
  bottom: 4px;
  border-radius: 6px;
  padding: 0 6px;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  color: #1a1510;
  font-size: 0.68rem;
  cursor: pointer;
  overflow: hidden;
  white-space: nowrap;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.06);
  transition: filter 0.12s ease, transform 0.12s ease;
}
.bc-seg:hover,
.bc-seg.active {
  filter: brightness(1.05);
  transform: translateY(-1px);
  outline: 2px solid #1a1a1a;
  outline-offset: 0;
  z-index: 2;
}
.bc-seg .bc-idx {
  font-family: var(--mono);
  font-weight: 600;
  opacity: 0.75;
  flex: 0 0 auto;
}
.bc-seg .bc-txt {
  overflow: hidden;
  text-overflow: ellipsis;
}
.bc-seg.color-gold { background: var(--gold-track); color: #1a1510; }
.bc-seg.color-frame { background: var(--coarse-track); color: #111; }
.bc-seg.color-contact { background: var(--contact-track); color: #f5fffc; }
.bc-playhead {
  position: absolute;
  top: 0.55rem;
  bottom: 1.55rem;
  width: 2px;
  background: #111;
  left: calc(112px + 0.55rem);
  z-index: 5;
  pointer-events: none;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.35);
}
.bc-axis {
  display: flex;
  justify-content: space-between;
  margin: 0.35rem 0 0;
  padding-left: calc(112px + 0.55rem);
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--muted);
}
.bc-caption {
  margin: 0.85rem 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-transform: uppercase;
  line-height: 1.45;
}
.bc-tip {
  margin-top: 0.65rem;
  padding: 0.7rem 0.85rem;
  background: #1b1b1b;
  color: #f4f1ea;
  border-radius: 10px;
  font-size: 0.9rem;
  line-height: 1.4;
}
.bc-tip[hidden] { display: none !important; }
.bc-tip-meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: #b9b3a8;
  margin-bottom: 0.35rem;
}
.bc-tip-full {
  white-space: normal;
  word-break: break-word;
}
@media (max-width: 700px) {
  .bc-lane { grid-template-columns: 84px 1fr; }
  .bc-playhead { left: calc(84px + 0.55rem); }
  .bc-axis { padding-left: calc(84px + 0.55rem); }
  .bc-seg { font-size: 0.62rem; padding: 0 4px; }
}

.param-pills {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  margin: 0.5rem 0 0.8rem;
}
.param-pills span {
  font-family: var(--mono);
  font-size: 0.75rem;
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  color: var(--muted);
}