body {
    font-family: 'Arial', sans-serif;
    background: url('darts-image.jpg') no-repeat center center fixed; 
    background-size: cover;
    color: #333;
    margin: 0;
    padding: 20px;
}

img#logo {
    width: 100px;
    height: auto;
    display: block;
    margin: 20px auto;
}

h1 {
    text-align: center;
    color: #fff;
    font-size: 3em;
    margin-bottom: 20px;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0 auto;
    max-width: 600px;
}

ul li {
    margin-bottom: 15px;
}

ul li a {
    text-decoration: none;
    color: white;
    background: #004BFF;
    padding: 18px 25px;
    display: block;
    text-align: center;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    font-size: 1.25em;
}

ul li a:hover {
    background: #0038cc;
}

@media (min-width: 768px) {
    img#logo {
        width: 250px;
    }

    h1 {
        font-size: 4.5em;
    }

    ul li a {
        font-size: 2em;
        padding: 25px 40px;
    }
}