body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #f7f7f7;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background: white;
  padding: 2rem;
  max-width: 600px;
  width: 90%;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  text-align: center;
}

h1 {
  margin-bottom: 1rem;
}

#sentence {
  font-style: italic;
  color: #555;
  margin-bottom: 1rem;
}

textarea {
  width: 100%;
  height: 100px;
  margin: 1rem 0;
  font-size: 1rem;
  padding: 0.75rem;
  border-radius: 6px;
  border: 1px solid #ccc;
  resize: none;
}

button {
  padding: 0.5rem 1.2rem;
  font-size: 1rem;
  background-color: #0077cc;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background-color: #005fa3;
}

#result {
  margin-top: 1rem;
  font-weight: bold;
  color: #333;
  background: #f0f0f0;
  padding: 0.5rem;
  border-radius: 6px;
}