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

#app {
    background-color: #333;
    color: #fff;
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

input {
    padding: 10px;
    border-radius: 4px;
    border: none;
    margin-bottom: 20px;
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    background-color: #007bff;
    color: white;
    cursor: pointer;
    font-size: 1rem;
}

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

#result {
    margin-top: 20px;
    padding: 10px;
    background-color: #222;
    display: inline-block;
}