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

main {
    text-align: center;
}

h1 {
    color: #333;
}

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

label {
    margin-right: 10px;
}

input[type="number"] {
    width: 50px;
    padding: 5px;
    font-size: 16px;
    text-align: center;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    margin-top: 20px;
}

button:hover {
    background-color: #45a049;
}