body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

header {
    text-align: center;
    padding: 1rem;
    background-color: #333;
    color: white;
    width: 100%;
}

header a {
    color: #fff;
    text-decoration: none;
    margin-left: 1rem;
}

header a:hover {
    text-decoration: underline;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

#gameCanvas {
    background-color: #fff;
    border: 2px solid #333;
    max-width: 100%;
    height: auto;
}

#instructions {
    margin-top: 1rem;
    text-align: center;
    max-width: 800px;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 1.5rem;
    }

    #instructions {
        font-size: 0.9rem;
    }
}