body {
    font-family: Arial, sans-serif;
    text-align: center;
    background: url('background.jpg') no-repeat center center fixed;
    background-size: cover;
}

h1 {
    color: white;
}

button {
    padding: 10px 20px;
    margin: 10px;
    border: none;
    cursor: pointer;
}

#scan {
    background-color: blue;
    color: white;
}

#startSpam {
    background-color: green;
    color: white;
}

#stopSpam {
    background-color: red;
    color: white;
}