body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
}

.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

.header {
  background-color: #212529;
  color: white;
  padding: 20px;
}

.h1,
.h2 {
  margin: 0;
}