body {
  margin: 0;
  background: #000;
  color: #fff;
  font-family: system-ui, sans-serif;
}

header {
  padding: 20px;
  background: #111;
  border-bottom: 1px solid #222;
}

section {
  margin: 20px;
  padding: 20px;
  background: #111;
  border-radius: 8px;
  border: 1px solid #222;
}