body {
  margin: 0;
  padding: 24px;
  background: #10131a;
  color: #dfe4ee;
  font: 15px/1.5 system-ui, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

h1 { font-size: 1.3rem; margin: 0; letter-spacing: .04em; }

canvas {
  background: #1a2030;
  border: 1px solid #2b3348;
  border-radius: 6px;
  max-width: 100%;
}

.controls, .goal-note { margin: 0; color: #8b93a7; font-size: .85rem; }