body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
     background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  text-align: center;
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  max-width: 320px;
  width: 90%;
}

h1 {
  background-color: #00ffff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 1.8rem;
  margin-bottom: 20px;
}

img {
  width: 100px;
  height: auto;
  margin-bottom: 1rem;
}

label {
  font-weight: bold;
  display: block;
  margin-bottom: 8px;
}

input[type="number"] {
  padding: 0.5rem;
  width: 100%;
  border: 2px solid #ccc;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 1rem;
}

button {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  background-color: #0077ff;
  color: white;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

button:hover {
  background-color: #005eea;
  transform: scale(1.05);
  box-shadow: 0 8px 20px rgba(0, 119, 255, 0.3);
}

#answer {
  margin-top: 20px;
  font-size: 1.4rem;
  color: #0077ff;
}