body {
    font-family: Arial, sans-serif;
    background-color: #708090;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-sizing: border-box;
}

.card {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 100%;
    max-width: 400px;
    margin-bottom: 20px;
}

.card h1 {
    margin-bottom: 20px;
    font-size: 24px;
}

input[type="number"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 5px;
    border: 1px solid #ccc;
    font-size: 16px;
}

button {
    padding: 10px 20px;
    border: none;
    background-color: #007BFF;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
    box-shadow: 0 0 10px rgba(0, 123, 255, 0.5);
    transition: box-shadow 0.3s ease;
    font-size: 16px;
}

button:hover {
    background-color: #0056b3;
    box-shadow: 0 0 20px rgba(0, 123, 255, 0.7);
}

#result {
    margin-top: 20px;
    font-size: 18px;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-all;
}

.container {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    width: 100%;
}

.container h2 {
    margin-top: 20px;
}

@media screen and (max-width: 768px) {
    body {
        padding: 10px;
    }

    .card {
        padding: 15px;
        max-width: 100%;
    }

    input[type="number"], button {
        font-size: 14px;
        padding: 8px;
    }

    #result {
        font-size: 16px;
    }

    .container {
        padding: 15px;
    }
}

@media screen and (max-width: 480px) {
    body {
        padding: 5px;
    }

    .card {
        padding: 10px;
    }

    input[type="number"], button {
        font-size: 12px;
        padding: 6px;
    }

    #result {
        font-size: 14px;
    }

    .container {
        padding: 10px;
    }
}