* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #000;
    font-family: 'Arial', sans-serif;
    overflow: hidden;
}

#gameCanvas {
    display: block;
    border: 2px solid #333;
    background: #000;
    cursor: pointer;
}

#gameCanvas:focus {
    outline: none;
}