html, body {
  font-size: 14px;
  font-family: sans-serif;
  margin: 0;
}

.top-bar {
  background: #333;
  color: white;
  padding: 10px 20px;
}

.top-bar a {
  color: white;
}

.container {
  padding: 20px;
}

.hide { display: none; }
.show { display: block; }

.error-container {
  color: red;
}

.pp {
  padding: 1em 2em;
}