*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: #0d1117;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  min-height: 100vh;
  padding: 1.5rem 1rem;
}

canvas {
  display: block;
  border-radius: 14px;
  cursor: default;
  user-select: none;
  -webkit-user-select: none;
  max-width: 100%;
}