:root {
  --bg: #07070a;
  --panel: #121218;
  --panel-edge: #23232e;
  --ink: #d8d4cc;
  --ink-dim: #8a8a98;
  --accent: #d4a54a;
  --accent-cool: #7ab8f0;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font: 13px/1.4 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  overflow: hidden;
}

body {
  display: grid;
  grid-template-columns: 1fr 300px;
  height: 100vh;
}

#stage-area {
  position: relative;
  overflow: hidden;
}

#view {
  width: 100%;
  height: 100%;
  display: block;
}

#sidebar {
  background: var(--panel);
  border-left: 1px solid var(--panel-edge);
  padding: 16px 16px 12px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 600;
}
.sub { margin: -6px 0 4px; color: var(--ink-dim); font-size: 11px; }

#readout {
  background: #0c0c11;
  border: 1px solid var(--panel-edge);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 11px;
  color: var(--ink-dim);
}
#readout b { color: var(--ink); font-weight: 600; }
#err { color: #e06a5a; margin-top: 4px; min-height: 0; }
#err:empty { display: none; }

#controls { display: flex; flex-direction: column; gap: 7px; }

.row {
  display: grid;
  grid-template-columns: 78px 1fr 42px;
  align-items: center;
  gap: 8px;
}
.row label { color: var(--ink-dim); font-size: 11px; }
.row .val { text-align: right; color: var(--ink); font-variant-numeric: tabular-nums; }

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  height: 4px;
}

.seed-row { grid-template-columns: 40px 1fr auto auto; }
.seed-row button { padding: 5px 7px; white-space: nowrap; }
.seed-row input[type="number"] {
  background: #0c0c11;
  border: 1px solid var(--panel-edge);
  color: var(--ink);
  border-radius: 4px;
  padding: 4px 6px;
  font: inherit;
  width: 100%;
}
button {
  background: #1c1c24;
  border: 1px solid var(--panel-edge);
  color: var(--ink);
  border-radius: 4px;
  padding: 5px 9px;
  font: inherit;
  cursor: pointer;
}
button:hover { background: #26262f; border-color: var(--accent); color: var(--accent); }

.toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  grid-template-columns: none;
  margin-top: 2px;
}
.tog { display: flex; align-items: center; gap: 5px; color: var(--ink-dim); cursor: pointer; }
.tog input { accent-color: var(--accent-cool); }

.stage { margin-top: auto; }
.stage .val { width: auto; text-align: right; font-size: 10px; color: var(--accent-cool); }

.hint { color: var(--ink-dim); font-size: 10px; margin: 4px 0 0; text-align: center; }