:root {
  color-scheme: dark;
  --bg: #101317;
  --panel: #171c22;
  --panel-border: #28303a;
  --text: #e6edf5;
  --muted: #97a6b7;
  --accent: #4aa8ff;
  --accent-dim: #244462;
  --warn: #ff5f56;
  --meter-bg: #0d1117;
  --meter-fill: #57c7ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: sans-serif;
}

body {
  height: 100vh;
  margin: 0;
  overflow: hidden;
}

.app,
.app-shell {
  position: relative;
  display: flex;
  flex-direction: row;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

.sidebar {
  position: relative;
  z-index: 1000;
  pointer-events: auto;
  width: 340px;
  min-width: 340px;
  height: 100%;
  padding: 18px;
  background: var(--panel);
  border-right: 1px solid var(--panel-border);
  overflow-y: auto;
  overflow-x: hidden;
}

.panel-head h1 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.2;
}

.subhead {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.4;
}

.panel-section {
  margin-top: 22px;
}

.panel-section h2 {
  margin: 0 0 12px;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.button-row,
.select-row,
.slider-row,
.meter-row,
.status-row {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.button-row {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.button-row .wide {
  grid-column: 1 / -1;
}

button,
select,
input[type="range"],
input[type="number"] {
  width: 100%;
}

button,
select,
input[type="number"] {
  border: 1px solid var(--panel-border);
  background: #11161d;
  color: var(--text);
  padding: 10px 12px;
  border-radius: 6px;
  font: inherit;
}

button,
input,
select,
label {
  pointer-events: auto;
}

button {
  cursor: pointer;
}

button:hover,
select:hover {
  border-color: #39506a;
}

button:active {
  background: #0d1218;
}

button.active {
  border-color: #66b8ff;
  background: #17324a;
}

.slider-row {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
}

.slider-row label {
  font-size: 0.92rem;
}

.slider-row .value {
  min-width: 56px;
  text-align: right;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.slider-row input[type="range"] {
  grid-column: 1 / -1;
  accent-color: var(--accent);
  margin: 0;
}

.select-row label,
.meter-row .meter-head,
.status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
}

.meter {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: var(--meter-bg);
  border: 1px solid var(--panel-border);
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-dim), var(--meter-fill));
}

.meter-value {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.meter-stack {
  display: grid;
  gap: 8px;
}

.meter-subrow {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.meter-tag {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-align: right;
}

.indicator {
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
}

.indicator-off {
  background: #1c232c;
  color: var(--muted);
}

.indicator-on {
  background: rgba(255, 95, 86, 0.16);
  color: var(--warn);
}

.main,
.canvasPane,
.canvasWrap,
.stage {
  position: relative;
  z-index: 1;
  pointer-events: auto;
}

.stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  height: 100%;
  padding: 12px;
  overflow: hidden;
  min-width: 0;
  min-height: 0;
}

.canvasOverlay,
.hudOverlay,
.legendOverlay {
  pointer-events: none;
}

.stage-stack {
  width: 100%;
  height: 100%;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  gap: 8px;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
}

.canvas-frame {
  width: 100%;
  flex: 1 1 auto;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-width: 0;
}

.panel-headings {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  display: none;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  flex: 0 0 auto;
}

.panel-headings.is-visible {
  display: grid;
}

.metrics-strip {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 8px 10px;
  border: 1px solid var(--panel-border);
  background: #11161d;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.45;
  font-variant-numeric: tabular-nums;
  flex: 0 0 auto;
  min-height: 72px;
  max-height: 84px;
  overflow: hidden;
  white-space: normal;
  overflow-wrap: anywhere;
}

.metrics-subtitle {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.3;
}

.panel-heading {
  padding: 8px 10px;
  border: 1px solid var(--panel-border);
  background: #11161d;
  border-radius: 6px;
  color: var(--text);
  font-size: 0.88rem;
  text-align: center;
}

#sim-canvas {
  display: block;
  background: #07090c;
  border: 1px solid var(--panel-border);
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
}

.legend {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 10px 12px;
  border: 1px solid var(--panel-border);
  background: #11161d;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
  flex: 0 0 auto;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.92rem;
}

.checkbox-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--accent);
}

.panel-label {
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.preset-grid {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.control-helper {
  margin: -2px 0 12px;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.4;
}

.summary-block {
  margin: 0 0 12px;
  padding: 10px 12px;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  background: #11161d;
}

.summary-line {
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.45;
  font-variant-numeric: tabular-nums;
}

.debug-block {
  margin-top: 14px;
  padding: 10px 12px;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  background: #11161d;
}

.debug-line {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
  font-variant-numeric: tabular-nums;
}