body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 90%;
    max-width: 400px;
}

h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

input[type="number"] {
    padding: 10px;
    margin: 10px 0;
    width: 100%;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
}

button {
    padding: 10px 15px;
    margin: 5px;
    font-size: 16px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    width: 45%;
}

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

#result {
    margin-top: 20px;
    font-weight: bold;
    font-size: 18px;
    color: #333;
    word-wrap: break-word;
    /*The word will break at any point and move to the next line to prevent overflow. */
}

@media (max-width: 500px) {
    .container {
        padding: 20px;
    }

    h2 {
        font-size: 1.2rem;
    }

    button {
        width: 100%;
        margin-top: 10px;
    }
}