:root {
  --paper: oklch(0.935 0.022 82);
  --paper-2: oklch(0.90 0.028 78);
  --ink: oklch(0.27 0.032 52);
  --muted: oklch(0.46 0.03 55);
  --rule: oklch(0.78 0.03 75);
  --accent: oklch(0.47 0.145 32);
  --accent-ink: oklch(0.97 0.02 80);
  --figure: oklch(0.86 0.028 78);
  --focus: oklch(0.47 0.145 32);
  --display: "Cormorant Garamond", "Palatino Linotype", serif;
  --ui: "Barlow", "Segoe UI", sans-serif;
  --cond: "Barlow Condensed", "Barlow", sans-serif;
  --space: 0.8rem;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--paper); color: var(--ink); font: 15px/1.45 var(--ui); }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--ink); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: var(--space); top: var(--space); background: var(--paper); padding: 0.4rem 0.6rem; z-index: 9; }

.mast {
  padding: 1.6rem 2.2rem 0.6rem 2.2rem;
  border-bottom: 1px solid var(--ink);
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  column-gap: 2rem;
}
.mast h1 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(2rem, 4vw, 3.1rem);
  letter-spacing: -0.02em;
  margin: 0;
  grid-column: 1;
  line-height: 1.05;
}
.mast h1 em { font-style: italic; color: var(--accent); font-weight: 500; }
.sig {
  grid-column: 2;
  grid-row: 1 / span 2;
  margin: 0;
  align-self: start;
  text-align: right;
  font-family: var(--cond);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.crumb {
  margin: 0.35rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.bench {
  display: grid;
  grid-template-columns: 11.5rem minmax(0, 1fr);
  min-height: calc(100vh - 6rem);
}
.rail {
  border-right: 1px solid var(--rule);
  padding: 1.4rem 1.1rem 2rem 2.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.rail-kicker, .figcap, .kicker {
  font-family: var(--cond);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--muted);
  margin: 0 0 0.6rem;
}
.rail a {
  color: var(--ink);
  text-decoration: none;
  font-size: 1.05rem;
  padding: 0.15rem 0;
  border-bottom: 1px solid transparent;
}
.rail a:hover, .rail a[aria-current="page"] { border-bottom-color: var(--accent); color: var(--accent); }
.rail-note { margin-top: 1.4rem; font-size: 0.78rem; color: var(--muted); line-height: 1.4; }

#stage { padding: 1.2rem 2.2rem 3rem 1.6rem; min-width: 0; }
.spread {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 24rem);
  gap: 1.4rem 1.8rem;
  align-items: start;
}
.spread.solo { grid-template-columns: minmax(0, 1fr); }
h2 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.85rem;
  margin: 0 0 0.4rem;
}
h3 { font-family: var(--display); font-weight: 600; font-size: 1.15rem; margin: 1rem 0 0.35rem; }
.lede { margin: 0 0 1rem; color: var(--muted); max-width: 40rem; }

.index {
  columns: 3;
  column-gap: 1.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.index a {
  display: grid;
  grid-template-columns: 2.1rem 1fr;
  color: var(--ink);
  text-decoration: none;
  padding: 0.18rem 0;
  border-bottom: 1px solid var(--rule);
  break-inside: avoid;
}
.index a:hover { color: var(--accent); }
.index .n { font-family: var(--cond); color: var(--muted); }

.figure {
  background: var(--figure);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
}
.figure canvas, .figure video { display: block; width: 100%; height: min(62vh, 540px); }
.figcap { padding: 0.45rem 0.1rem 0; }

.toggles { display: flex; flex-wrap: wrap; gap: 0.35rem 0.9rem; margin: 0.5rem 0 0.8rem; }
.toggles label { font-size: 0.85rem; display: flex; gap: 0.35rem; align-items: center; cursor: pointer; }
.toggles input { accent-color: var(--accent); }

.tree { max-height: 28rem; overflow: auto; font-size: 0.82rem; line-height: 1.35; }
.tree button {
  display: block; width: 100%; text-align: left;
  background: none; border: 0; color: inherit; font: inherit; cursor: pointer; padding: 0.08rem 0.2rem;
}
.tree button:hover, .tree button.sel { background: color-mix(in oklab, var(--accent) 16%, var(--paper)); }
.tree .extra { color: var(--muted); font-style: italic; }

table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
th, td { text-align: left; padding: 0.22rem 0.45rem 0.22rem 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-family: var(--cond); letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600; color: var(--muted); }
.num { font-variant-numeric: tabular-nums; font-family: var(--cond); font-size: 0.95rem; }

.slots {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 2px;
}
.slots button {
  aspect-ratio: 1;
  border: 1px solid var(--rule);
  background: var(--paper-2);
  color: var(--ink);
  font: 600 0.72rem/1 var(--cond);
  cursor: pointer;
  padding: 0;
}
.slots button:hover, .slots button.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.slots button.known { box-shadow: inset 0 -2px 0 var(--accent); }

.transport { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin: 0.6rem 0; }
.transport button, .ghost {
  background: none; border: 1px solid var(--ink); color: var(--ink);
  font: 500 0.85rem var(--ui); padding: 0.25rem 0.7rem; cursor: pointer;
}
.transport button:hover, .ghost:hover { background: var(--ink); color: var(--paper); }
.transport input[type="range"] { flex: 1; accent-color: var(--accent); min-width: 8rem; }

.hyp {
  border-left: 2px solid var(--accent);
  padding: 0.2rem 0 0.2rem 0.7rem;
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0.6rem 0 1rem;
}

svg.graph { width: 100%; height: auto; background: var(--paper-2); }
svg.graph text { font: 500 11px var(--ui); fill: var(--ink); }
svg.graph .edge { stroke: var(--ink); fill: none; stroke-width: 1; }
svg.graph .node { fill: var(--paper); stroke: var(--ink); }
svg.graph .node.c { fill: color-mix(in oklab, var(--accent) 18%, var(--paper)); }

.tl {
  position: relative;
  height: 4.2rem;
  background: var(--paper-2);
  border-top: 1px solid var(--ink);
  margin: 0.6rem 0 1rem;
}
.tl i {
  position: absolute; top: 0.4rem; width: 2px; height: 1.4rem; background: var(--accent);
}
.tl i[data-k="cam"] { height: 2.4rem; background: var(--ink); }
.tl i[data-k="anim"] { top: 1.6rem; background: oklch(0.45 0.08 155); }
.tl i[data-k="fade"] { top: 2.6rem; background: var(--muted); width: 8px; opacity: 0.7; }
.playhead { position: absolute; top: 0; bottom: 0; width: 1px; background: var(--accent); }


.menu-cv { display: block; width: min(100%, 640px); height: auto; background: #1a120c; border: 1px solid var(--ink); image-rendering: pixelated; }
.menu-pick { display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 0.4rem 0; }
.menu-pick button { font: 500 0.85rem var(--cond); letter-spacing: 0.06em; text-transform: uppercase; border: 1px solid var(--ink); background: var(--paper); padding: 0.2rem 0.5rem; cursor: pointer; }
.menu-pick button:hover { background: var(--accent); color: var(--accent-ink); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.empty { color: var(--muted); font-style: italic; }
.live-wrap { margin: 0.6rem 0 1rem; }
.live-bar { display: flex; flex-wrap: wrap; gap: 0.55rem; align-items: center; margin-bottom: 0.35rem; }
.live-bar .st { color: var(--accent); font-family: var(--cond); }
.live { background: #111; aspect-ratio: 4/3; max-height: min(46vh, 400px); border: 1px solid var(--ink); }
.live iframe { width: 100%; height: 100%; border: 0; display: block; }
.plays, .wep { display: flex; flex-wrap: wrap; gap: 0.25rem; margin: 0.35rem 0 0.7rem; }
.plays button, .wep button, td button.play { font: 500 0.75rem var(--cond); letter-spacing: 0.04em; text-transform: uppercase; border: 1px solid var(--ink); background: var(--paper); padding: 0.12rem 0.4rem; cursor: pointer; }
.plays button:hover, .wep button:hover, td button.play:hover { background: var(--accent); color: var(--accent-ink); }
.tl i.on { outline: 2px solid var(--accent); background: var(--accent); }


.combo-study { display: grid; grid-template-columns: minmax(0, 1fr) minmax(16rem, 20rem); gap: 1.5rem; align-items: start; }
.combo-study > section { position: sticky; top: 1rem; min-width: 0; }
.combo-study .figure { margin: 0; }
.combo-study #zhao-vp { height: min(58vh, 540px); min-height: 320px; }
.combo-study canvas { height: 100%; }
.combo-study .figcap { padding: 0.5rem; }
.combo-family h3 { margin-top: 0; }
.combo-family { margin-bottom: 1.25rem; }
.combo-family button { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.3rem; width: 100%; min-height: 44px; padding: 0.6rem; border: 0; border-bottom: 1px solid var(--rule); color: var(--ink); background: transparent; font: inherit; text-align: left; cursor: pointer; }
.combo-family button:hover, .combo-family button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); }
.combo-family button:disabled { opacity: 0.55; cursor: not-allowed; }
.combo-family button:disabled:hover { background: transparent; color: var(--ink); }
.combo-family small { flex-basis: 100%; }
.combo-input { font-size: 1rem; letter-spacing: 0.06em; }
#zhao-current { min-height: 3rem; }
.transport select { font: inherit; color: var(--ink); background: var(--paper); }

@media (max-width: 900px) {
  .bench { grid-template-columns: 1fr; }
  .rail { flex-direction: row; flex-wrap: wrap; border-right: 0; border-bottom: 1px solid var(--rule); padding: 0.8rem 1.2rem; }
  .rail-note { display: none; }
  .spread, .row2, .index { grid-template-columns: 1fr; columns: 1; }
  .combo-study { grid-template-columns: 1fr; }
  .combo-study > section { position: static; }
  .mast { padding: 1rem 1.2rem 0.5rem; }
  #stage { padding: 1rem 1.2rem 2rem; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}