body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #a18cd1, #fbc2eb);
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.app {
  background: #fff;
  padding: 2rem;
  border-radius: 1.5rem;
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
  text-align: center;
  max-width: 400px;
}

h1 {
  margin-bottom: 0.3rem;
}

.subtitle {
  color: #555;
  margin-bottom: 1.5rem;
}

.prompt-box {
  background: #f3f4f6;
  padding: 1.2rem;
  border-radius: 0.8rem;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

button {
  background: #6c5ce7;
  color: white;
  border: none;
  padding: 0.7rem 1.5rem;
  font-size: 1rem;
  border-radius: 0.8rem;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background: #341f97;
}

.timer {
  font-size: 1.2rem;
  margin-top: 1rem;
  font-weight: bold;
}