*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #0d0d12;
  --surf:    #12121a;
  --surf2:   #181820;
  --bord:    #22222e;
  --bord2:   #2c2c3c;
  --txt:     #c0c0d4;
  --dim:     #5a5a78;
  --acc:     #c9a84c;
  --acc2:    #7a6028;
  --red:     #c94c4c;
  --green:   #4aaf80;
  --blue:    #4a70b0;
  --font:    'SF Mono', 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--txt);
  font-family: var(--font);
  font-size: 12px;
  overflow: hidden;
}

#app {
  display: flex;
  height: 100vh;
}

/* ── Sidebar ── */
#sidebar {
  width: 272px;
  min-width: 272px;
  background: var(--surf);
  border-right: 1px solid var(--bord);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px 14px;
  overflow-y: auto;
}

#title-block {
  text-align: center;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--bord);
}

#emblem {
  font-size: 26px;
  line-height: 1;
  margin-bottom: 6px;
  filter: sepia(0.8) hue-rotate(10deg);
}

#title-block h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .35em;
  color: var(--acc);
}

#tagline {
  margin-top: 3px;
  font-size: 10px;
  color: var(--dim);
  letter-spacing: .18em;
}

#year-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

#year-row .dim { font-size: 10px; }

#year-val {
  font-size: 26px;
  font-weight: 700;
  color: var(--acc);
  letter-spacing: .05em;
}

/* Presets */
#presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
}

.preset {
  background: var(--surf2);
  border: 1px solid var(--bord2);
  color: var(--dim);
  padding: 6px 4px;
  font-family: var(--font);
  font-size: 10px;
  cursor: pointer;
  transition: border-color .12s, color .12s;
  text-align: center;
  letter-spacing: .05em;
}

.preset:hover {
  border-color: var(--acc2);
  color: var(--acc);
}

.preset.active {
  border-color: var(--acc);
  color: var(--acc);
  background: #1e1a0a;
}

/* Constitution editor */
#editor {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article {
  background: var(--surf2);
  border: 1px solid var(--bord);
  padding: 10px 10px 8px;
}

.art-title {
  font-size: 9.5px;
  color: var(--acc);
  letter-spacing: .12em;
  font-weight: 600;
  margin-bottom: 9px;
  text-transform: uppercase;
}

.ctrl {
  margin-bottom: 8px;
}
.ctrl:last-child { margin-bottom: 0; }

.ctrl label {
  display: block;
  font-size: 10px;
  color: var(--dim);
  margin-bottom: 4px;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slider-row input[type=range] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: var(--bord2);
  outline: none;
  cursor: pointer;
  border-radius: 0;
}

.slider-row input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 11px;
  height: 11px;
  background: var(--acc);
  cursor: pointer;
  border-radius: 0;
}

.slider-row input[type=range]::-moz-range-thumb {
  width: 11px;
  height: 11px;
  background: var(--acc);
  cursor: pointer;
  border-radius: 0;
  border: none;
}

.val {
  font-size: 11px;
  color: var(--txt);
  min-width: 36px;
  text-align: right;
}

/* Radio buttons */
#redist-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rb {
  background: transparent;
  border: 1px solid var(--bord2);
  color: var(--dim);
  padding: 5px 8px;
  font-family: var(--font);
  font-size: 10px;
  text-align: left;
  cursor: pointer;
  transition: border-color .12s, color .12s, background .12s;
  letter-spacing: .04em;
}

.rb:hover:not(.active) {
  border-color: var(--acc2);
  color: var(--txt);
}

.rb.active {
  background: #1e1a0a;
  border-color: var(--acc);
  color: var(--acc);
}

/* Run row */
#run-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#btn-run, #btn-reset {
  background: var(--surf2);
  border: 1px solid var(--acc2);
  color: var(--acc);
  padding: 7px 14px;
  font-family: var(--font);
  font-size: 11px;
  cursor: pointer;
  letter-spacing: .06em;
  transition: background .12s, color .12s;
}

#btn-run:hover, #btn-reset:hover {
  background: var(--acc);
  color: var(--bg);
}

#speed-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
}

#sl-speed {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: var(--bord2);
  cursor: pointer;
}

#sl-speed::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  background: var(--acc2);
  cursor: pointer;
  border-radius: 0;
}

/* Metrics */
#metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.met {
  background: var(--surf2);
  border: 1px solid var(--bord);
  padding: 7px 8px;
}

.met-l {
  display: block;
  font-size: 9px;
  color: var(--dim);
  letter-spacing: .08em;
  margin-bottom: 3px;
  text-transform: uppercase;
}

.met-v {
  display: block;
  font-size: 17px;
  color: var(--acc);
  font-weight: 700;
}

/* Legend */
#legend {
  border-top: 1px solid var(--bord);
  padding-top: 10px;
}

.leg-title {
  font-size: 9px;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.leg-row {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 10px;
  color: var(--dim);
  margin-bottom: 4px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dim { color: var(--dim); }

/* ── Main area ── */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 18px 14px;
  background: var(--bg);
  overflow: hidden;
  min-width: 0;
}

#sim-canvas {
  border: 1px solid var(--bord);
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

#charts {
  display: flex;
  gap: 10px;
}

.chart-box {
  flex: 1;
  background: var(--surf);
  border: 1px solid var(--bord);
  padding: 7px 8px 6px;
  min-width: 0;
}

.chart-lbl {
  font-size: 9px;
  color: var(--dim);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 5px;
}

.ch {
  display: block;
  width: 100%;
  height: auto;
}

#dist-box {
  background: var(--surf);
  border: 1px solid var(--bord);
  padding: 7px 8px 6px;
}

#ch-dist {
  display: block;
  width: 100%;
  height: auto;
}

/* Scrollbar */
#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-track { background: transparent; }
#sidebar::-webkit-scrollbar-thumb { background: var(--bord2); }