body {
  font-family: Arial, sans-serif;
  background: #f4f7fb;
  display: flex;
  justify-content: center;
  padding: 20px;
}

.app-container {
  background: white;
  border-radius: 12px;
  padding: 20px;
  width: 350px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  text-align: center;
}

header h1 {
  color: #0077cc;
}

textarea {
  width: 100%;
  height: 80px;
  margin: 10px 0;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #ccc;
}

.languages {
  margin: 10px 0;
  text-align: left;
}

button {
  background: #0077cc;
  color: white;
  padding: 10px 15px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background: #005fa3;
}

.hidden {
  display: none;
}