* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #111;
  color: #f5f5f5;
}

main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  gap: 24px;
  padding: 32px;
}

.intro {
  text-align: center;
  max-width: 640px;
}

.intro h1 {
  margin-bottom: 8px;
  font-size: 2rem;
}

.intro p {
  margin-top: 0;
  color: #bbb;
}

#sketch-holder {
  border: 1px solid #333;
  border-radius: 16px;
  overflow: hidden;
}