body {
    background-color: #f4f4f4;
    padding: 20px;
}

.container {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    max-width: 400px;
    margin-top: 50px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.1);
}

h2 {
    font-weight: bold;
    margin-bottom: 20px;
}

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