:root {
  --ground: #111111;
  --well: #18181b;
  --raised: #232326;
  --raised-hover: #2c2c30;
  --text: #ffffff;
  --body: #e8e8e8;
  --muted: #888888;
  --on-raised: #f5f5f5;
  --accent: #ff4d6d;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 2rem 1rem 3rem;
  background: var(--ground);
  color: var(--body);
  font: 400 0.9375rem/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
main { max-width: 1100px; margin: 0 auto; }
h1 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
p.lede { margin: 0 0 2rem; font-size: 0.8125rem; color: var(--muted); }
canvas {
  display: block;
  width: 100%;
  height: auto;
  background: var(--well);
  border-radius: 8px;
  touch-action: none;
  cursor: crosshair;
}
.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem;
  margin-top: 1.5rem;
}
button {
  font: 600 0.8125rem/1 inherit;
  letter-spacing: -0.02em;
  color: var(--on-raised);
  background: var(--raised);
  border: 0;
  border-radius: 999px;
  padding: 0.375rem 0.75rem;
  cursor: pointer;
  transition: background 150ms ease, color 150ms ease;
}
button:hover { background: var(--raised-hover); }
button:focus-visible { outline: 2px solid var(--body); outline-offset: 2px; }
#toggle { background: var(--accent); color: var(--ground); }
#toggle:hover { background: var(--accent); }
.stats {
  margin-left: auto;
  font-size: 0.8125rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.stats span {
  display: inline-block;
  transition: transform 350ms cubic-bezier(0.34, 1.38, 0.64, 1), opacity 350ms ease;
}
.stats span.tick { transform: translateY(0.45em); opacity: 0; }
.notes { margin-top: 3rem; max-width: 640px; }
.notes h2 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
.notes p { margin: 0 0 1rem; }
.notes ul { margin: 0 0 1rem; padding-left: 1rem; color: var(--muted); }
.notes li { margin-bottom: 0.375rem; }
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}