body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    overflow: hidden;
}

#gameContainer {
    position: relative;
    width: 100vw;
    height: 100vh;
}

#gameCanvas {
    display: block;
}

#uiOverlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

#uiOverlay button {
    pointer-events: auto;
}

#gameOverScreen {
    z-index: 20;
}