body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f0f4f8;
  color: #333;
}

header {
  background-color: #0d9488;
  color: white;
  padding: 1rem;
  text-align: center;
}

nav button {
  margin: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: white;
  color: #0d9488;
  border: 1px solid #0d9488;
  border-radius: 4px;
  cursor: pointer;
}

.section {
  padding: 1rem;
}

textarea, input[type="text"] {
  width: 100%;
  padding: 0.5rem;
  margin-bottom: 1rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}

button {
  padding: 0.5rem 1rem;
  background-color: #0d9488;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.hidden {
  display: none;
}

#ttsResult, #uploadStatus, #confStatus {
  margin-top: 1rem;
  font-weight: bold;
}