body {
  margin: 40px auto;
  max-width: 650px;
  line-height: 1.6;
  font-size: 18px;
  color: #444;
  padding: 0 10px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

h1, h2, h3 {
  line-height: 1.2;
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: #1a1a1a;
    color: #ccc;
  }
}

/* Centering utility for the index page */
.centered-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 80vh;
  text-align: center;
}