/* DEVS — instrument interface. Strictly black & white. */
:root {
  --bg: #000;
  --fg: #fff;
  --dim: rgba(255, 255, 255, 0.5);
  --faint: rgba(255, 255, 255, 0.16);
  --hair: rgba(255, 255, 255, 0.1);
  --panel-w: 296px;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}
#stage {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  cursor: crosshair;
  touch-action: none;
}
#stage.grabbing { cursor: grabbing; }

.ui { transition: opacity 0.4s ease, transform 0.4s ease; }
body.hide-ui .ui:not(#panel-toggle) { opacity: 0; pointer-events: none; }
body.hide-ui #panel { transform: translateX(16px); }
body.hide-ui #panel-toggle { opacity: 0.25; }

/* ── masthead ─────────────────────────── */
#mast { position: fixed; top: 22px; left: 24px; pointer-events: none; }
#mast .mark { font-weight: 800; font-size: 13px; letter-spacing: 0.12em; }
#mast .mark sup { font-weight: 400; color: var(--dim); font-size: 10px; margin: 0 1px; }
#mast .sub { color: var(--dim); margin-top: 4px; font-size: 9px; letter-spacing: 0.14em; }

/* ── hud ──────────────────────────────── */
#hud {
  position: fixed;
  left: 24px;
  bottom: 22px;
  min-width: 230px;
  pointer-events: none;
  font-size: 9.5px;
  line-height: 1.75;
}
#hud-level { font-weight: 500; letter-spacing: 0.16em; border-bottom: 1px solid var(--faint); padding-bottom: 4px; margin-bottom: 4px; }
.hud-line { display: flex; justify-content: space-between; gap: 18px; }
.hud-line.dim { color: var(--dim); }

/* ── zoom ladder ──────────────────────── */
#ladder {
  position: fixed;
  left: 50%;
  bottom: 26px;
  width: min(360px, 34vw);
  transform: translateX(-50%);
  pointer-events: none;
}
#ladder .track { position: relative; height: 9px; border-bottom: 1px solid var(--faint); }
#ladder .track i { position: absolute; bottom: 0; width: 1px; height: 5px; background: var(--faint); }
#ladder .track b { position: absolute; bottom: -1px; width: 1px; height: 11px; background: var(--fg); transform: translateX(-0.5px); transition: left 0.08s linear; }
#ladder .ticks { position: relative; height: 12px; margin-top: 6px; font-size: 8px; color: var(--dim); letter-spacing: 0.18em; }
#ladder .ticks span { position: absolute; top: 0; transform: translateX(-50%); white-space: nowrap; transition: color 0.3s; }
#ladder .ticks span:first-child { transform: none; }
#ladder .ticks span.on { color: var(--fg); }

/* ── panel ────────────────────────────── */
#panel-toggle {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 5;
  width: 28px;
  height: 28px;
  border: 1px solid var(--faint);
  background: #000;
  cursor: pointer;
  display: grid;
  place-content: center;
  gap: 4px;
  padding: 0;
}
#panel-toggle span { display: block; width: 11px; height: 1px; background: var(--fg); }
#panel-toggle:hover { border-color: var(--fg); }

#panel {
  position: fixed;
  top: 56px;
  right: 18px;
  bottom: 18px;
  width: var(--panel-w);
  z-index: 4;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
#panel .scroll {
  pointer-events: auto;
  max-height: 100%;
  overflow-y: auto;
  background: rgba(0, 0, 0, 0.86);
  border: 1px solid var(--hair);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  scrollbar-width: thin;
  scrollbar-color: var(--faint) transparent;
}
.sec { border-bottom: 1px solid var(--hair); }
.sec:last-child { border-bottom: 0; }
.sec header {
  display: grid;
  grid-template-columns: 26px 1fr auto;
  align-items: center;
  padding: 11px 14px;
  cursor: pointer;
  letter-spacing: 0.2em;
}
.sec header .num { color: var(--dim); font-size: 9px; }
.sec header .ttl { font-weight: 500; }
.sec header .chev { color: var(--dim); transition: transform 0.25s; }
.sec.closed header .chev { transform: rotate(90deg); }
.sec header:hover .ttl { text-decoration: underline; text-underline-offset: 3px; }
.sec .body { padding: 2px 14px 12px; display: grid; gap: 7px; }
.sec.closed .body { display: none; }

.row { display: grid; grid-template-columns: 84px 1fr; align-items: center; gap: 8px; min-height: 20px; }
.row.range { grid-template-columns: 84px 1fr 40px; }
.lbl { color: var(--dim); font-size: 9px; letter-spacing: 0.12em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.val { text-align: right; font-size: 9.5px; font-variant-numeric: tabular-nums; }

/* range */
input[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 18px;
  background: transparent;
  cursor: ew-resize;
  margin: 0;
  --p: 50%;
}
input[type='range']::-webkit-slider-runnable-track {
  height: 1px;
  background: linear-gradient(to right, var(--fg) 0 var(--p), var(--faint) var(--p) 100%);
}
input[type='range']::-moz-range-track { height: 1px; background: var(--faint); }
input[type='range']::-moz-range-progress { height: 1px; background: var(--fg); }
input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 9px;
  height: 9px;
  margin-top: -4px;
  background: var(--fg);
  border: 0;
  border-radius: 0;
}
input[type='range']::-moz-range-thumb { width: 9px; height: 9px; background: var(--fg); border: 0; border-radius: 0; }
input[type='range']:focus { outline: none; }

/* buttons */
button {
  font: inherit;
  color: var(--fg);
  background: transparent;
  border: 1px solid var(--faint);
  padding: 5px 6px;
  cursor: pointer;
  letter-spacing: 0.12em;
  font-size: 9px;
  white-space: nowrap;
}
button:hover { border-color: var(--fg); }
button.on { background: var(--fg); color: var(--bg); border-color: var(--fg); }
button:active { background: var(--fg); color: var(--bg); }
.segs { display: flex; gap: 0; }
.segs button { flex: 1; margin-left: -1px; }
.segs button:first-child { margin-left: 0; }
.row.seg { grid-template-columns: 84px 1fr; }
.row.btns { grid-template-columns: none; display: flex; gap: 6px; }
.row.btns button { flex: 1; }
button.wide { flex: 1; }
.tog { justify-self: start; min-width: 44px; }
.slots button.filled { border-color: var(--dim); }
.slots button.filled::after { content: '·'; margin-left: 3px; }

/* select / text */
select, .txt {
  font: inherit;
  font-size: 9.5px;
  letter-spacing: 0.1em;
  color: var(--fg);
  background: #000;
  border: 1px solid var(--faint);
  padding: 4px 6px;
  border-radius: 0;
  width: 100%;
  outline: none;
}
select { -webkit-appearance: none; appearance: none; cursor: pointer; background-image: none; }
select:hover, .txt:focus { border-color: var(--fg); }
.hint { margin: 2px 0 0; color: var(--dim); font-size: 8px; line-height: 1.6; letter-spacing: 0.12em; }

/* toast */
#toast {
  position: fixed;
  top: 22px;
  left: 50%;
  transform: translate(-50%, -6px);
  padding: 7px 12px;
  border: 1px solid var(--fg);
  background: #000;
  letter-spacing: 0.16em;
  font-size: 9.5px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 10;
}
#toast.on { opacity: 1; transform: translate(-50%, 0); }
body.recording #stage { cursor: progress; }

/* boot */
#boot {
  position: fixed;
  inset: 0;
  background: #000;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 10px;
  z-index: 20;
  transition: opacity 0.8s;
}
#boot div { font-weight: 800; font-size: 28px; letter-spacing: 0.3em; }
#boot span { color: var(--dim); letter-spacing: 0.2em; }
#boot.done { opacity: 0; pointer-events: none; }

@media (max-width: 720px) {
  :root { --panel-w: calc(100vw - 32px); }
  #panel { top: auto; height: 46vh; right: 16px; }
  #ladder { display: none; }
  #hud { bottom: auto; top: 64px; left: 16px; }
  #mast { left: 16px; }
}

/* keep centred overlays clear of the panel on wide screens */
@media (min-width: 901px) {
  body:not(.hide-ui) #ladder { left: calc((100vw - 318px) / 2); }
}