.app-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
  color: #646cff;
}

.test-marker {
  font-size: 1.2em;
  color: #888;
  margin: 1rem 0;
}

.card {
  padding: 2em;
  background-color: #f9f9f9;
  border-radius: 8px;
  margin: 2rem 0;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  color: white;
  cursor: pointer;
  transition: border-color 0.25s;
}

button:hover {
  border-color: #646cff;
}

.version {
  font-size: 0.9em;
  color: #999;
  margin-top: 2rem;
}