* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: #000;
  color: #fff;
}

main {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  height: 100vh;
}

h1 {
  margin: 0;
}

#palette {
  display: flex;
  gap: 0.5rem;
  background: #333;
  padding: 0.5rem 0.5rem 0rem 0.5rem;
} #palette button {
  cursor: grab;
  border: none;
  padding: 0.5rem 1rem;
  font-size: 1rem;
}

canvas {
  flex-grow: 1;
  display: block;
  border: 0.5rem solid #333;
}