body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  color: #333;
}

h1 {
  text-align: center;
  color: #2c3e50;
}

h2 {
  color: #2c3e50;
  margin-top: 30px;
}

.last-updated {
  text-align: right;
  color: #666;
  font-size: 0.9em;
  margin-top: 50px;
}

.language-selector {
  text-align: right;
  margin-bottom: 20px;
}

.language-btn {
  background: none;
  border: 1px solid #2c3e50;
  border-radius: 4px;
  padding: 5px 10px;
  margin-left: 5px;
  cursor: pointer;
  height: 32px;
  vertical-align: middle;
  line-height: 1;
}

.language-btn.active {
  background-color: #2c3e50;
  color: white;
}

.content {
  display: none;
}

.content.active {
  display: block;
}