:root {
  --bg: #0b0d12;
  --fg: #c9d1d9;
  --muted: #6e7681;
  --panel: rgba(18, 22, 30, 0.88);
  --border: #262c36;
  --accent: #e4307a;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: radial-gradient(ellipse at 50% 45%, #121622 0%, var(--bg) 70%);
  color: var(--fg);
  font: 13px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow: hidden;
}

#stage {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
}

.hud {
  position: fixed;
  left: 12px;
  bottom: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
}

button,
select {
  font: inherit;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

.seed {
  color: var(--muted);
  text-decoration: none;
}

.seed:hover {
  color: var(--fg);
}

.dev-panel {
  position: fixed;
  top: 12px;
  right: 12px;
  width: 260px;
  padding: 12px;
  display: grid;
  gap: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  backdrop-filter: blur(6px);
}

.dev-panel[hidden] {
  display: none;
}

.dev-panel header {
  display: grid;
  gap: 2px;
}

.dev-panel label {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px;
  color: var(--muted);
}

.dev-panel label output {
  color: var(--fg);
}

.dev-panel input[type="range"],
.dev-panel select {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--accent);
}

.dev-panel .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hint {
  color: var(--muted);
  font-size: 11px;
}