body {
    font-family: Arial, sans-serif;
    background-image: url(sunny.jpeg);
    background-size: cover;
    background-position: center;
    margin: 0;
    padding: 0;
}

h1 {
    color: rgb(5, 5, 60);
    font-size: 50px;
    text-align: center;
    margin: 20px 0;
}

form {
    background-color: rgb(251, 253, 253);
    text-align: center;
    max-width: 450px;
    margin: 20px auto;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.2);
}

#textbox {
    width: 100%;
    max-width: 300px;
    text-align: center;
    font-size: 1.5em;
    border: rgb(58, 3, 3) solid 4px;
    border-radius: 5px;
    padding: 10px;
    box-sizing: border-box;
}

label {
    font-size: 1.2em;
    font-weight: bold;
    display: block;
    margin-bottom: 10px;
}

button {
    margin-top: 15px;
    background-color: chocolate;
    font-size: 1.2em;
    border-radius: 5px;
    cursor: pointer;
    color: white;
    padding: 10px 20px;
    border: none;
}

button:hover {
    background-color: rgb(215, 12, 12);
}

#result {
    font-size: 1.5em;
    font-weight: bold;
    margin-top: 20px;
}

/* Media Queries for Mobile Devices */
@media (max-width: 768px) {
    h1 {
        font-size: 40px;
    }

    form {
        padding: 20px;
    }

    #textbox {
        font-size: 1.2em;
        max-width: 80%;
    }

    label {
        font-size: 1em;
    }

    button {
        font-size: 1em;
        padding: 10px;
    }

    #result {
        font-size: 1.2em;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 30px;
    }

    form {
        padding: 15px;
    }

    #textbox {
        font-size: 1em;
        max-width: 90%;
    }

    label {
        font-size: 0.9em;
    }

    button {
        font-size: 0.9em;
        padding: 8px;
    }

    #result {
        font-size: 1em;
    }
}