body {
  font-family: Arial, sans-serif;
  background: #f8f8f8;
  padding: 30px;
}

.calculator {
  background: #fff;
  padding: 30px;
  max-width: 600px;
  margin: auto;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  font-size: 24px;
  color: #333;
}

label {
  font-size: 16px;
  display: block;
  margin-top: 20px;
}

select, input[type="range"] {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  font-size: 16px;
}

.result {
  margin-top: 30px;
  text-align: center;
}

.adsense {
  color: #27ae60;
  font-size: 20px;
  margin-bottom: 10px;
}

.header-bidding {
  color: #2980b9;
  font-size: 20px;
}