body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 20px;
}
.container {
    max-width: 500px;
    margin: auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 10px;
    background-color: #f9f9f9;
}
.result-box {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    font-weight: bold;
}
#class-1 {
    background-color: #D4EDDA;
    color: #155724;
}
#class-2 {
    background-color: #F8D7DA;
    color: #721C24;
}