.calculator-container {
  background: #fff;
  padding: 25px;
  border-radius: 15px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  max-width: 420px;
  width: 100%;
  margin: 20px auto;
  font-family: Arial, sans-serif;
}

.calculator-container h2 {
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

label {
  font-size: 14px;
  color: #444;
  margin-bottom: 6px;
  display: block;
}

input {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 16px;
  margin-bottom: 15px;
  outline: none;
  transition: border 0.3s;
}

input:focus {
  border: 1px solid #007bff;
}

button {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  background: #007bff;
  color: white;
  cursor: pointer;
  transition: background 0.3s;
  margin-top: 8px;
}

button:hover {
  background: #0056b3;
}

.bill-breakdown {
  margin-top: 20px;
  padding: 15px;
  border-radius: 10px;
  background: #f9fafc;
  border: 1px solid #eee;
}

.bill-breakdown h3 {
  margin-bottom: 10px;
  font-size: 18px;
  color: #333;
}

.bill-breakdown p {
  margin: 6px 0;
  font-size: 15px;
  color: #444;
}

.total {
  font-weight: bold;
  font-size: 17px;
  color: #000;
}

.refresh-btn {
  background: #6c757d;
}

.refresh-btn:hover {
  background: #495057;
}