:root {
  --bg: #0b0e10;
  --chassis: #131819;
  --panel: #171d1f;
  --line: #263033;
  --line-soft: #1d2528;
  --ink: #e2eaec;
  --muted: #7f8f95;
  --dim: #5b696e;
  --mint: #86e7c0;
  --mint-dim: #2b6d59;
  --amber: #f0a95e;
  --amber-dim: #6d4a24;
  --radius: 3px;
  --pad: 18px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: var(--pad);
  gap: 14px;
  max-width: 1500px;
  margin: 0 auto;
}

h1, h2 { margin: 0; font-weight: 600; }

.masthead {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 20px;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.brand h1 {
  font-size: 22px;
  letter-spacing: 0.22em;
  font-weight: 500;
}

.brand p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.transport {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.seg {
  display: flex;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.seg button {
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  padding: 0 12px;
  min-height: 44px;
  cursor: pointer;
}

.seg button:last-child { border-right: 0; }
.seg button:hover { color: var(--ink); background: #1b2224; }

.seg button.on {
  background: var(--mint);
  color: #06231a;
  font-weight: 600;
}

#compareSeg button.on { background: var(--amber); color: #2a1704; }

button {
  font: inherit;
  color: var(--ink);
  background: #1b2224;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 44px;
  padding: 0 14px;
  cursor: pointer;
}

button:hover { border-color: #3a4649; background: #212a2d; }
button:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

.trigger { letter-spacing: 0.08em; text-transform: lowercase; }
.trigger kbd {
  font: inherit;
  font-size: 10px;
  color: var(--dim);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 1px 4px;
  margin-left: 6px;
}
.trigger.live { background: var(--mint); color: #06231a; font-weight: 600; }

button.primary {
  background: transparent;
  border-color: var(--mint-dim);
  color: var(--mint);
  letter-spacing: 0.04em;
}
button.primary:hover { background: #12241f; border-color: var(--mint); }

.work {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 344px;
  gap: 14px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-head h2 {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.read { font-size: 11px; color: var(--dim); font-variant-numeric: tabular-nums; }

.field {
  position: relative;
  height: 420px;
  background: linear-gradient(180deg, #101618 0%, #0d1214 100%);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  touch-action: none;
}

#plot { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

.lanes { position: absolute; inset: 0; pointer-events: none; }

.lane-tag {
  position: absolute;
  left: 8px;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
}
.decay-tag { top: 8px; color: var(--mint); opacity: 0.75; }
.tone-tag { bottom: 8px; color: var(--amber); opacity: 0.75; }

#handles { position: absolute; inset: 0; pointer-events: none; }

.handle {
  position: absolute;
  width: 44px;
  height: 44px;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  cursor: ns-resize;
  min-height: 0;
  pointer-events: auto;
}

.handle::after {
  content: '';
  position: absolute;
  inset: 14px;
  border-radius: 50%;
  background: #0d1214;
  border: 2px solid var(--mint);
  transition: transform 90ms ease;
}

#toneHandles .handle::after { border-color: var(--amber); }

.handle:hover::after, .handle:focus-visible::after { transform: scale(1.28); }
.handle:focus-visible { outline: none; }
.handle:focus-visible::after { box-shadow: 0 0 0 3px rgba(134, 231, 192, 0.32); }
#toneHandles .handle:focus-visible::after { box-shadow: 0 0 0 3px rgba(240, 169, 94, 0.32); }
.handle.drag::after { background: var(--mint); }
#toneHandles .handle.drag::after { background: var(--amber); }

.readouts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin: 12px 0 0;
}

.readouts div { border-left: 1px solid var(--line); padding-left: 9px; }
.readouts dt {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
}
.readouts dd {
  margin: 2px 0 0;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.rack { display: flex; flex-direction: column; gap: 12px; }

.jobs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.jobs button {
  text-align: left;
  padding: 8px 10px;
  font-size: 12px;
  line-height: 1.25;
  display: flex;
  flex-direction: column;
  gap: 3px;
  justify-content: center;
}

.jobs button small { color: var(--dim); font-size: 10px; }
.jobs button.on { border-color: var(--mint-dim); background: #12241f; }
.jobs button.on small { color: var(--mint-dim); }

details { border-top: 1px solid var(--line-soft); padding-top: 10px; }
details summary {
  cursor: pointer;
  list-style: none;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 4px 0;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 4px;
}
details summary::-webkit-details-marker { display: none; }
details summary::before { content: '+ '; color: var(--dim); }
details[open] summary::before { content: '– '; }
summary .hint { text-transform: none; letter-spacing: 0.02em; color: var(--dim); margin-left: auto; font-size: 10px; }

.row { display: block; margin: 10px 0; }
.row > span {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 3px;
}
.row em {
  font-style: normal;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 44px;
  background: transparent;
  margin: 0;
  cursor: pointer;
}
input[type=range]::-webkit-slider-runnable-track {
  height: 4px;
  background: #232c2f;
  border-radius: 2px;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  margin-top: -8px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid #0d1214;
}
input[type=range]:hover::-webkit-slider-thumb { background: var(--mint); }
input[type=range]::-moz-range-track { height: 4px; background: #232c2f; border-radius: 2px; }
input[type=range]::-moz-range-thumb { width: 18px; height: 18px; border: 2px solid #0d1214; border-radius: 50%; background: var(--ink); }

.seed-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.seed-row > span { font-size: 12px; color: var(--muted); }
.seed-row em { font-style: normal; color: var(--ink); font-variant-numeric: tabular-nums; }
.seed-tools button { min-height: 44px; font-size: 12px; }

.state-row { display: flex; flex-wrap: wrap; gap: 8px; }
.state-row button { font-size: 12px; min-height: 44px; flex: 1 1 auto; }

.status {
  border-top: 1px solid var(--line);
  padding-top: 10px;
  font-size: 12px;
  color: var(--muted);
  min-height: 24px;
}
.status.err { color: var(--amber); }

@media (max-width: 900px) {
  body { padding: 12px; }
  .work { grid-template-columns: minmax(0, 1fr); }
  .field { height: 360px; }
  .readouts { grid-template-columns: 1fr 1fr; }
  .brand h1 { font-size: 19px; }
  .transport { width: 100%; }
  .trigger { flex: 1 1 auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}