body {
  background: linear-gradient(135deg, #667eea, #764ba2);
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  color: white;
}

.card {
  background: rgba(0,0,0,0.4);
  padding: 30px;
  border-radius: 16px;
  width: 320px;
  text-align: center;
}

select, input, button {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
  border-radius: 8px;
  border: none;
}

button {
  background: #00ffcc;
  font-weight: bold;
  cursor: pointer;
}

#result {
  margin-top: 15px;
}