:root {
  --bg: #e9f2ff;
  --panel: rgba(255, 255, 255, 0.75);
  --panel-border: rgba(0, 0, 0, 0.12);
  --text: #111;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial,
    "Noto Sans", "Liberation Sans", sans-serif;
  background: radial-gradient(1200px 800px at 40% 20%, #f7fbff, var(--bg));
  color: var(--text);
  overflow: hidden;
}

.stage {
  height: 100%;
}

canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  border-radius: 0;
  box-shadow: none;
  background: #cfe6ff;
}

.hud {
  position: fixed;
  top: 14px;
  left: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  user-select: none;
}

.hud__row {
  display: flex;
  gap: 10px;
  align-items: baseline;
}

.hud__title {
  font-weight: 700;
  letter-spacing: 0.2px;
}

.hud__value {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.hud__hint {
  margin-top: 6px;
  font-size: 12px;
  opacity: 0.75;
  max-width: 240px;
  line-height: 1.25;
}