:root {
  color-scheme: dark;
  font-family: system-ui, sans-serif;
  background: #080c10;
  color: #dfeaf2;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at top, #16303a, #080c10 58%);
}

main {
  width: min(92vw, 680px);
  text-align: center;
  padding: 2rem 0;
}

.eyebrow {
  color: #5edcf0;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

canvas {
  display: block;
  width: min(80vw, 320px);
  height: auto;
  margin: 1.5rem auto;
  border: 1px solid #2f4354;
  border-radius: 14px;
  box-shadow: 0 18px 60px #0008;
  touch-action: none;
}

output {
  display: block;
  min-height: 1.5em;
}

button {
  margin-top: 1rem;
  border: 0;
  border-radius: 999px;
  padding: .75rem 1.15rem;
  background: #22c7e2;
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}