:root {
  /* the UI is greyscale. colour is reserved for the graph and the heatmaps. */
  --bg:#000;
  --stage:#050506;
  --panel:#0a0a0b;
  --well:#111112;
  --raise:#1a1a1c;
  --sel:#1f1f22;           /* selected row */

  --ink:#fafafa;
  --dim:#a2a2a6;
  --faint:#78787e;

  --line:rgba(255,255,255,.10);
  --line2:rgba(255,255,255,.26);

  /* editorial serif for prose, neutral sans for controls, mono for figures */
  --serif:"New York","Iowan Old Style",ui-serif,Georgia,"Hoefler Text","Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Inter","SF Pro Text",system-ui,"Segoe UI",sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,"Roboto Mono",monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}
* { box-sizing:border-box; margin:0; padding:0; border-radius:0; }
html,body { height:100%; }
body {
  background:
    radial-gradient(rgba(255,255,255,.045) 1px, transparent 1px) 0 0 / 28px 28px,
    var(--stage);
  color:var(--ink);
  font:12.5px/1.5 var(--sans);
  letter-spacing:-.005em;
  -webkit-font-smoothing:antialiased; font-synthesis:none;
  text-rendering:optimizeLegibility;
  overflow:hidden;
}
::selection { background:var(--ink); color:#000; }
button { font:inherit; color:inherit; background:none; border:none; cursor:pointer; }
:focus-visible { outline:1px solid var(--ink); outline-offset:2px; }
a { color:var(--ink); text-decoration:underline; text-decoration-color:var(--line2);
    text-decoration-thickness:1px; text-underline-offset:3px; transition:text-decoration-color .15s var(--ease); }
a:hover { text-decoration-color:var(--ink); }

/* ================= the stage: one full-bleed canvas ================= */
canvas#c {
  position:fixed; inset:0; width:100%; height:100%;
  display:block; cursor:none; touch-action:none;
}
/* every control floats above it */
#masthead, #proj, #deck, #displayCl, #records, #dock, .keys, .credit { position:fixed; z-index:2; }

/* shared bits */
.ov {                                    /* small-caps overline heading */
  display:flex; align-items:center; gap:8px;
  font:600 10px/1 var(--serif); letter-spacing:.2em; text-transform:uppercase;
  color:var(--faint);
}
.ov::after { content:""; flex:1; height:1px; background:var(--line); }

/* ---- top-left: identity + telemetry ---- */
#masthead { top:22px; left:26px; max-width:370px; }
#masthead h1 { font:500 15px/1.3 var(--serif); letter-spacing:.13em; text-transform:uppercase; }
#masthead h1 em { font-style:normal; }
#masthead p { font:italic 12.5px/1.5 var(--serif); letter-spacing:.005em; color:var(--dim); margin-top:4px; }
#readout {
  margin-top:16px; display:flex; flex-wrap:wrap; gap:9px 16px;
  font:10.5px/1 var(--mono); color:var(--faint);
}
#readout span { display:flex; align-items:baseline; gap:6px; }
#readout i {
  font-style:normal; font-family:var(--serif); font-weight:600; font-size:9.5px;
  letter-spacing:.14em; text-transform:uppercase;
}
#readout b { color:var(--ink); font-weight:600; font-variant-numeric:tabular-nums; }
#spark { width:74px; height:15px; display:block; align-self:center; }
#hud {
  margin-top:10px; pointer-events:none; min-height:1.5em;
  font:10.5px/1 var(--mono); color:var(--dim); letter-spacing:-.01em;
}

/* ---- top-center: projection switcher ---- */
#proj { top:22px; left:50%; transform:translateX(-50%); text-align:center; }
#proj .ov { justify-content:center; }
#proj .ov::before { content:""; flex:1; height:1px; background:var(--line); }
#layoutMain { display:flex; justify-content:center; gap:2px; margin-top:9px; }
#layoutMain .vrow {
  padding:5px 14px 6px; border-bottom:2px solid transparent;
  transition:background .12s var(--ease), border-color .12s var(--ease);
}
#layoutMain .vrow:hover { background:var(--raise); }
#layoutMain .vrow.active { background:var(--sel); border-bottom-color:var(--ink); }
#layoutMain .vdesc { display:none; }
#layoutCap { font:italic 11.5px/1.5 var(--serif); color:var(--faint); margin-top:7px; }

.vname { font:500 13px/1.4 var(--serif); color:var(--dim); transition:color .12s var(--ease); }
.vrow:hover .vname, .vrow.active .vname { color:var(--ink); }

/* ---- top-right: transport + tempo, one instrument block ---- */
#deck { top:22px; right:26px; width:232px; background:var(--panel); }
#transport { display:flex; }
#transport button {
  flex:1; padding:7px 0; font-size:11.5px; font-weight:500; color:var(--dim);
  transition:background .12s var(--ease), color .12s var(--ease);
}
#transport button + button { border-left:1px solid var(--line); }
#transport button:hover { background:var(--raise); color:var(--ink); }
#deckSpeed {
  display:flex; flex-direction:row-reverse; align-items:center; gap:10px;
  padding:9px 12px; border-top:1px solid var(--line);
  font:10.5px/1 var(--mono); color:var(--faint); cursor:pointer;
}
#deckSpeed span {
  color:var(--ink); min-width:12ch; text-align:right; white-space:nowrap;
  font-variant-numeric:tabular-nums;
}
#deckSpeed input[type=range] { flex:1; width:auto; }

/* ---- bottom-left: display toggles + brush ---- */
#displayCl { left:26px; bottom:52px; width:168px; }
.chips { display:grid; gap:5px; margin-top:12px; }
.chip {
  display:flex; align-items:center; justify-content:center; gap:7px;
  cursor:pointer; -webkit-user-select:none; user-select:none;
  background:transparent; border:1px solid var(--line);
  padding:6px 0; font-size:11.5px; font-weight:500; color:var(--faint);
  transition:background .12s var(--ease), color .12s var(--ease), border-color .12s var(--ease);
}
.chip input { display:none; }
.chip::before {                                 /* on/off tell */
  content:""; width:7px; height:7px; flex:none;
  box-shadow:inset 0 0 0 1px var(--line2);
  transition:background .12s var(--ease), box-shadow .12s var(--ease);
}
.chip:hover { color:var(--dim); background:var(--raise); }
.chip:has(input:checked) { background:var(--well); border-color:var(--line2); color:var(--ink); }
.chip:has(input:checked)::before { background:var(--ink); box-shadow:none; }

.ctrl { margin-top:14px; }
.ctrl label {
  font-size:11.5px; color:var(--dim); display:flex; justify-content:space-between;
  align-items:baseline; margin-bottom:8px;
}
.ctrl label span { color:var(--ink); font-family:var(--mono); font-size:10.5px;
                   font-variant-numeric:tabular-nums; }
input[type=range] {
  -webkit-appearance:none; appearance:none; width:100%; height:3px;
  background:linear-gradient(90deg,var(--dim) var(--fill,50%), var(--well) var(--fill,50%));
  box-shadow:inset 0 0 0 1px var(--line);
  outline:none; cursor:pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance:none; appearance:none; width:3px; height:12px;
  background:var(--ink); border:none;
}
input[type=range]::-moz-range-thumb { width:3px; height:12px; background:var(--ink); border:none; }

/* ---- bottom-right: the records (trace + weights), expand upward ---- */
#records {
  right:26px; bottom:52px; width:236px;
  max-height:max(200px, calc(100vh - 200px)); overflow-y:auto;
  scrollbar-width:thin; scrollbar-color:var(--line2) transparent;
}
#records::-webkit-scrollbar { width:6px; }
#records::-webkit-scrollbar-thumb { background:var(--line2); }
#records details + details { margin-top:18px; }
summary.h2 {
  display:flex; align-items:center; gap:8px;
  font:600 10px/1 var(--serif); letter-spacing:.2em; text-transform:uppercase;
  color:var(--faint); margin-bottom:8px;
  cursor:pointer; list-style:none; transition:color .12s var(--ease);
}
summary.h2::after { content:""; flex:1; height:1px; background:var(--line); }
summary.h2:hover { color:var(--dim); }
summary.h2::-webkit-details-marker { display:none; }
summary.h2::before { content:"+"; font:400 12px/1 var(--mono); color:var(--dim); width:8px; text-align:center; }
details[open] summary.h2::before { content:"\2212"; }
.mat {
  width:100%; display:block; image-rendering:pixelated;
  background:var(--well); border:1px solid var(--line);
}
#trace { height:50px; }
.wcap { font:italic 11.5px/1.45 var(--serif); color:var(--faint); margin-top:6px; }
.wcap + .mat { margin-top:10px; }

/* ---- bottom dock: the story, the optics, the channel filmstrip ---- */
#dock {
  left:50%; bottom:24px; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:9px;
  width:min(calc(100vw - 560px), 940px);
}
#story {
  font:14.5px/1.5 var(--serif); letter-spacing:.005em;
  color:var(--dim); text-align:center; min-height:1.5em; max-width:640px;
  background:rgba(5,5,6,.6); padding:1px 12px;
  -webkit-backdrop-filter:blur(6px); backdrop-filter:blur(6px);
}
#story b { color:var(--ink); font-weight:600; }
#dockrow { display:flex; align-items:stretch; gap:12px; width:100%; }
#viewMain {
  flex:none; display:flex; flex-direction:column; justify-content:space-between;
  padding-right:12px; border-right:1px solid var(--line);
}
#viewMain .vrow {
  display:flex; text-align:left;
  padding:2px 12px 2px 8px; border-left:2px solid transparent;
  transition:background .12s var(--ease), border-color .12s var(--ease);
}
#viewMain .vrow:hover { background:var(--raise); }
#viewMain .vrow.active { background:var(--sel); border-left-color:var(--ink); }
#viewMain .vname { font-size:12.5px; }
#viewMain .vdesc { display:none; }
#viewCap { display:none; }               /* the legend carries the caption */

#chanbar { flex:1; min-width:0; }
#chanstrip { display:flex; gap:1px; background:var(--line); border:1px solid var(--line); height:100%; }
#chanstrip .cell {
  position:relative; flex:1; min-width:0; display:block;
  padding:5px 5px 4px; background:var(--panel);
  transition:background .12s var(--ease);
}
#chanstrip .cell:hover { background:var(--raise); }
#chanstrip .cell.active { background:var(--sel); }
#chanstrip .cell.active::after {
  content:""; position:absolute; left:0; right:0; top:0; height:2px; background:var(--ink);
}
#chanstrip .cell.alpha { box-shadow:1px 0 0 var(--line2); }
.cth {
  display:block; width:100%; aspect-ratio:1; background:#000;
  box-shadow:inset 0 0 0 1px var(--line);
}
.clab {
  display:block; margin-top:3px; text-align:center;
  font:500 9.5px/1.4 var(--mono); color:var(--faint);
  font-variant-numeric:tabular-nums; transition:color .12s var(--ease);
}
.cell:hover .clab, .cell.active .clab { color:var(--ink); }
#legend {
  font:italic 11.5px/1.5 var(--serif); color:var(--faint); text-align:center;
  background:rgba(5,5,6,.6); padding:1px 12px;
  -webkit-backdrop-filter:blur(6px); backdrop-filter:blur(6px);
}
#legend .sw {
  display:inline-flex; align-items:center; gap:6px; vertical-align:-1px;
  font:9.5px/1 var(--mono); font-style:normal; color:var(--faint);
}
#legend .sw b { width:54px; height:7px; box-shadow:inset 0 0 0 1px var(--line); }

/* ---- corners: shortcuts + attribution ---- */
.keys, .credit {
  bottom:16px; white-space:nowrap;
  font:11.5px/1.5 var(--serif); color:var(--faint);
}
.keys { left:26px; cursor:default; }
.keys .klist { opacity:0; transition:opacity .15s var(--ease); }
.keys:hover .klist { opacity:1; }
.credit { font-style:italic; right:26px; text-align:right; }
.keys b {
  font:600 9.5px/1 var(--mono); color:var(--dim); background:var(--well);
  border:1px solid var(--line); border-bottom-width:2px;
  padding:2px 4px; margin:0 2px;
}

@media (max-width:1100px) {
  #masthead { max-width:230px; }
  #masthead p { display:none; }
  #displayCl, #records { display:none; }
  #dock { width:96vw; }
}
@media (max-width:900px) {
  .credit, #layoutCap { display:none; }
  #dock { bottom:20px; }
  #viewMain .vrow { padding:1px 8px 1px 6px; }
}