body {
  font-family: 'Segoe UI', sans-serif;
  background: #e0f7fa;
  color: #333;
  padding: 40px;
  text-align: center;
}
.container {
  background: white;
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  max-width: 500px;
  margin: auto;
}
select, input[type="range"] {
  width: 80%;
  padding: 8px;
  margin: 10px 0;
}
button {
  background: #00796b;
  color: white;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}
.result-box {
  background: #f1f8e9;
  padding: 20px;
  border-radius: 10px;
  margin-top: 20px;
}