body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f9;
  color: #333;
  text-align: center;
}

.container {
  margin: 50px auto;
  max-width: 600px;
  padding: 20px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

h1 {
  color: #0073e6;
}

form {
  display: flex;
  flex-direction: column;
  align-items: center;
}

label {
  font-weight: bold;
  margin-top: 10px;
}

select, input, button {
  margin-top: 10px;
  padding: 10px;
  width: 80%;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  background-color: #0073e6;
  color: white;
  cursor: pointer;
}

button:hover {
  background-color: #005bb5;
}

.results {
  margin-top: 20px;
  padding: 15px;
  background-color: #f9f9f9;
  border-radius: 5px;
}

.line {
  margin: 5px 0;
  font-size: 16px;
}

.error {
  color: red;
  font-weight: bold;
  margin-top: 10px;
}