body {
  font-family: system-ui, sans-serif;
  margin: 0;
  background: #f8f9fa;
  color: #222;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header,
footer {
  background: #222;
  color: #fff;
  padding: 1em;
}

nav a {
  color: #fff;
  margin-right: 1em;

  header,
  footer {
    background: #222;
    color: #fff;
    padding: 1em;
  }

  box-sizing: border-box;
}

main {
  padding: 2em;
}

.header-title {
  color: #fff;
  text-decoration: none;
}

footer {
  margin-top: auto;
}

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