body {
  font-family: 'Segoe UI', sans-serif;
  background: #f0f2f5;
  display: flex;
  justify-content: center;
  padding-top: 60px;
}

.container {
  background: white;
  padding: 30px 40px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  width: 400px;
  text-align: center;
}

input, button {
  padding: 10px;
  margin-top: 10px;
  width: 90%;
  border: 1px solid #ccc;
  border-radius: 8px;
}

button {
  background-color: #4caf50;
  color: white;
  cursor: pointer;
  border: none;
}

.result {
  margin-top: 20px;
  background: #e0f1f4;
  padding: 5px;
  border-radius: 8px;
}