body {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #2c2c2c;
    color: #f0f0f0;
}

#app {
    text-align: center;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    margin-top: 10px;
    cursor: pointer;
}