body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
    margin: 0;
}

.container {
    text-align: center;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    max-width: 400px;
    width: 100%;
}

.input-section {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="number"], button {
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin-right: 10px;
}

button {
    cursor: pointer;
    background-color: #007bff;
    color: #fff;
    border: none;
}

button:hover {
    background-color: #0056b3;
}

#output {
    margin-top: 20px;
    font-size: 18px;
    font-weight: bold;
}